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Chem. Proc., 2022, Priochem 2021

The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM

Bucharest, Romania | 27–29 October 2021

Volume Editors:
Mihaela Doni, National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Romania
Florin Oancea, National Institute for Research & Development in Chemistry and Petrochemistry-ICECHIM, Romania
Zina Vuluga, INCDCP-ICECHIM Bucharest, Romania
Radu Claudiu Fierăscu, Development ICECHIM Bucharest, Romania

Number of Papers: 88
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Cover Story (view full-size image): Making complex scientific topics accessible for the public while maintaining scientific accuracy requires placing science and research in a larger narrative context. Society has become more and more [...] Read more.
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2 pages, 187 KiB  
Abstract
Extraction of Germinated Seeds by Conventional and Modern Methods
by Diana Pasarin, Camelia Rovinaru and Catalin Matei
Chem. Proc. 2022, 7(1), 1; https://doi.org/10.3390/chemproc2022007001 - 28 Feb 2022
Viewed by 1205
Abstract
The germination process of whole seeds activates and multiplies the composition of amino acids, antioxidants, vitamins, proteins, enzymes, and sugars, and decreases phytate and protease inhibitors concentrations. Furthermore, germination contributes to the improved digestibility of plant proteins; conversion of carbohydrates to simpler forms [...] Read more.
The germination process of whole seeds activates and multiplies the composition of amino acids, antioxidants, vitamins, proteins, enzymes, and sugars, and decreases phytate and protease inhibitors concentrations. Furthermore, germination contributes to the improved digestibility of plant proteins; conversion of carbohydrates to simpler forms for easy assimilation; bioavailability of minerals; freeing up of minerals for absorption; and an increase of beneficial enzymes. The aim of this paper was to perform the extraction of alfalfa germinated seeds using conventional and modern methods for the purpose of physical-chemical characterization. The extraction of germinated seeds was carried out by several methods, namely conventional (hydro-alcoholic and autoclave extraction) and modern (ultrasound-assisted extraction) methods. For each method, the following parameters have been set: solvent/substrate ratio, temperature, and reaction time. Hydro-alcoholic extraction was performed according to the method described by Piantino et al. (2008) with minor modifications [1]. The parameters were as follows: ethanol:water ratio 70:30 v/v, reaction time 24 h, at room temperature, and stirred at 150 rpm. Autoclave extraction was performed according to the method described by Maurizio D’Auria (2021) using parameters temperature (121 °C), pressure (1 bar), and reaction time (15 min) [2]. Ultrasound-assisted extraction carried out according to the method described by Ahmad and Shehta (2020) with modifications [3]. The parameters were as follows: 70% ethanol, substrat:solvent ratio 1:10, reaction time 10, 20, 30 min, at room temperature in an ultrasonic bath. The proximate chemical composition analysis for each extract was performed, which refers to water content, total nitrogen, crude protein, carbohydrates, ash, and both macro and micro elements using standard methods. Following the comparative analysis of the preliminary results obtained for the four extracts, the modern method ultrasound-assisted extraction was selected. The mean percentage of chemical compounds was: moisture (at 105 °C) 78.2 ± 0.48%, crude protein 23 ± 1%, and ash (at 550 °C) 3.09 ± 0.004%. The preliminary chemical analysis of the extracts served as the basis for the selection of the extraction method. Conventional methods require a long time for extraction and use solvents at high costs. The interest in using modern methods for the extraction of germinated seeds is growing due to reduced reaction time and solvent volume involved and the accuracy of results obtained. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 193 KiB  
Abstract
Use of Bacterial Carbonatogenesis for Construction Materials
by Iuliana Raut, Mariana Constantin, Elvira Alexandrescu, Claudia Ninciuleanu, Monica Raduly, Ana-Maria Gurban, Mihaela Doni, Ionela Petre, Cristian Andi Nicolae, Nicoleta Radu, Gelu Vasilescu and Luiza Jecu
Chem. Proc. 2022, 7(1), 2; https://doi.org/10.3390/chemproc2022007002 - 28 Feb 2022
Viewed by 1103
Abstract
Concrete is the most used construction material, but its industrial production from lime consumes 2–3% of the global energy demand, generating 0 [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 453 KiB  
Abstract
Emphasizing the General Methods for the Use of the Natural Mineral Waters Located around the Salt Mines, according to Their Therapeutic Properties
by Ana Despina Ionescu, Angela Casarica, Roxana Madalina Stoica and Nicoleta Ene
Chem. Proc. 2022, 7(1), 3; https://doi.org/10.3390/chemproc2022007003 - 28 Feb 2022
Viewed by 1095
Abstract
According to studies conducted in Europe [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 182 KiB  
Abstract
Microbes in Saline Environments and Their Potential Applications in Sustainable Agriculture
by Caterina Tomulescu
Chem. Proc. 2022, 7(1), 4; https://doi.org/10.3390/chemproc2022007004 - 28 Feb 2022
Cited by 1 | Viewed by 1246
Abstract
This review paper aims to summarize aspects related to the biotechnological potential of halophile and halotolerant microbes in the sustainable management of agricultural practices. During the past few years, different microorganisms have been isolated from saline environments (including in Romania) and characterized for [...] Read more.
This review paper aims to summarize aspects related to the biotechnological potential of halophile and halotolerant microbes in the sustainable management of agricultural practices. During the past few years, different microorganisms have been isolated from saline environments (including in Romania) and characterized for the discovery of new species and their potential use in industrial applications. This paper presents a brief literature review, conducted using various open access scientific databases using keywords such as halophilic bacteria/bioinoculants, saline soils, halotolerant ecology, novel halophiles, plant growth-promoting halophiles, salinity stress, salt-tolerant microbes, etc. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 368 KiB  
Abstract
Molecular Design of Functional Ingredients Starting from Natural Bioactive Compounds
by Ioana Tabrea, Amalia Stefaniu, Lucia Camelia Pirvu and Gabriela Savoiu
Chem. Proc. 2022, 7(1), 5; https://doi.org/10.3390/chemproc2022007005 - 28 Feb 2022
Viewed by 1139
Abstract
In the last few years, a new concept of functional foods has been developed, leading to the diversification of food production [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 192 KiB  
Abstract
Exploring the Potential of Beneficial Paecilomyces to Improve Plant Growth
by Mariana Constantin, Iuliana Raut, Ana-Maria Gurban, Gelu Vasilescu, Mihaela Doni, Nicoleta Radu, Elvira Alexandrescu and Luiza Jecu
Chem. Proc. 2022, 7(1), 6; https://doi.org/10.3390/chemproc2022007006 - 28 Feb 2022
Viewed by 1198
Abstract
Introduction: For sustainable agriculture, an attempt has been made to reduce the use of fertilizers and agrochemicals, replacing them instead with biostimulants as viable alternatives [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 188 KiB  
Abstract
Silver Nanoparticles Mediated by Natural Extracts Recovered from Wastes and By-Products
by Cristian Moisa, Andreea I. Lupitu, Adriana Csakvari, Dana Radu, Dorina Chambre, Lucian Copolovici and Dana Maria Copolovici
Chem. Proc. 2022, 7(1), 7; https://doi.org/10.3390/chemproc2022007007 - 28 Feb 2022
Viewed by 1214
Abstract
Introduction: Current environmental problems demand an eco-friendlier approach to the chemical synthesis of metal nanoparticles (NPs) [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 185 KiB  
Abstract
The Benefits of Applying Compost in Agriculture as Aronia Crops Fertilizer
by Georgica Pandelea (Voicu), Daniela-Simina Stefan, Mirela Florina Calinescu, Ivona Cristina Enescu (Mazilu) and Camelia Ungureanu
Chem. Proc. 2022, 7(1), 8; https://doi.org/10.3390/chemproc2022007008 - 28 Feb 2022
Viewed by 1223
Abstract
Introduction: This paper presents the preliminary results of a study that aims to emphasize the compost effect, when used as fertilizer, in Aronia melanocarpa crops [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 189 KiB  
Abstract
Evaluation of the Catalytic Degradation Capacity of Green Synthesized Silver Nanoparticles on Bis-Azoic Dyes
by Ana-Alexandra Sorescu, Alexandrina Nuta, Rodica-Mariana Ion, Valentin Raditoiu and Laurentiu Marin
Chem. Proc. 2022, 7(1), 9; https://doi.org/10.3390/chemproc2022007009 - 28 Feb 2022
Viewed by 1135
Abstract
Introduction: Silver nanoparticles (AgNPs), widely recognized for their antimicrobial and antioxidant capacity, can be prepared following both conventional and unconventional routes and have a multitude of applications in numerous scientific domains, including the catalytic degradation of dyes that result from the textile [...] Read more.
Introduction: Silver nanoparticles (AgNPs), widely recognized for their antimicrobial and antioxidant capacity, can be prepared following both conventional and unconventional routes and have a multitude of applications in numerous scientific domains, including the catalytic degradation of dyes that result from the textile industry [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 429 KiB  
Abstract
A Computational Study to Identify Some Potential Inhibitors of SARS-CoV-2 Main Protease from Biological Active Quinolones
by Lucia Pintilie
Chem. Proc. 2022, 7(1), 10; https://doi.org/10.3390/chemproc2022007010 - 28 Feb 2022
Viewed by 1201
Abstract
The coronavirus pandemic, known as COVID-19, is caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 369 KiB  
Abstract
Treatment of Dairy Wastewaters Using Nannochloris sp. Microalgae Strain
by Alin Vintilă, Alexandru Vlaicu, Mihaela Cîlțea-Udrescu, Luiza Mîrț, Ana-Maria Gălan and Anca Paulenco
Chem. Proc. 2022, 7(1), 11; https://doi.org/10.3390/chemproc2022007011 - 28 Feb 2022
Cited by 1 | Viewed by 1160
Abstract
The dairy industry is one of the main sources of agro-industrial wastewater [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 188 KiB  
Abstract
Chitosan-Based Bactericidal Interpenetrated Hydrogels
by Iulia Elena Neblea, Andreea Gabriela Olaru, Anita-Laura Chiriac, Anamaria Zaharia, Razvan Botez, Mircea Teodorescu, Andrei Sarbu and Tanta-Verona Iordache
Chem. Proc. 2022, 7(1), 12; https://doi.org/10.3390/chemproc2022007012 - 28 Feb 2022
Viewed by 1295
Abstract
Bactericidal interpenetrated hydrogels have become a popular topic in recent years due to their unique properties, with potential applications in wound-healing devices [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 216 KiB  
Abstract
Stability of Bioactive Extracts from Porphyridium purpureum Microalgae Biomass under Various Stress Factors
by Alexandru Vlaicu, Mihaela Cîlțea-Udrescu, Alin Vintilă, Grigore Pșenovschi, Anca Paulenco and Ana-Maria Gălan
Chem. Proc. 2022, 7(1), 13; https://doi.org/10.3390/chemproc2022007013 - 28 Feb 2022
Viewed by 1062
Abstract
Nowadays, the interest for high-quality products of natural origin is increasing worldwide [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 177 KiB  
Abstract
The Potential of Biopolyesters as Plasticizers for Polylactide
by Marius Stelian Popa, Elena Ruxandra Radu, Denis Mihaela Panaitescu, Augusta Raluca Gabor, Cristian Andi Nicolae, Monica Florentina Raduly and Adriana Nicoleta Frone
Chem. Proc. 2022, 7(1), 14; https://doi.org/10.3390/chemproc2022007014 - 28 Feb 2022
Viewed by 1030
Abstract
It is estimated that fossil fuel resources will dwindle by the end of 2050 if the current utilization rate persists [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
1 pages, 171 KiB  
Abstract
Mesoporous Silica Systems Loaded with Polyphenols
by Gabriela Petrisor, Ludmila Motelica, Roxana Trusca, Vladimir Lucian Ene, Denisa Ficai, Ovidiu Cristian Oprea, Georgeta Voicu and Anton Ficai
Chem. Proc. 2022, 7(1), 15; https://doi.org/10.3390/chemproc2022007015 - 1 Mar 2022
Viewed by 1452
Abstract
In this work, we obtain mesoporous silica systems loaded with polyphenolic compounds (p-coumaric acid, trans-ferulic acid, epicatechin, and catechin). Polyphenolic compounds are used as biologically active agents for the treatment of various diseases. These compounds have high antioxidant activity. As a carrier, two [...] Read more.
In this work, we obtain mesoporous silica systems loaded with polyphenolic compounds (p-coumaric acid, trans-ferulic acid, epicatechin, and catechin). Polyphenolic compounds are used as biologically active agents for the treatment of various diseases. These compounds have high antioxidant activity. As a carrier, two types of mesoporous silica have been proposed and obtained according to the classical templating method with cetyltrimethylammonium bromide, CTAB, under alkaline conditions. Polyphenols (p-coumaric acid, trans-ferulic acid, epicatechin, and catechin) were loaded under vacuum into the mesoporous silica. The materials obtained were characterized by Scanning Electron Microscopy, X-ray Diffraction, the Brunauer–Emmett–Teller Method, Complex Thermal Analysis–DTA-TG and Fourier Transform Infrared Spectroscopy. In this study, mesoporous silica systems were obtained and further loaded with p-coumaric acid, trans-ferulic acid, epicatechin and catechin. The results highlight that the materials can be used as drug delivery systems, with the results being promising (simulated gastric fluid, SGF, and simulated intestinal fluid, SIF) for various environments. The proposed loading methodology is suitable for loading these natural agents, mostly, inside the pores. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
3 pages, 916 KiB  
Abstract
Plant Biostimulants for Enhanced Sustainability of High-Residue Farming Systems
by Diana Constantinescu-Aruxandei, Steven Brooks, Alina Nicolescu, Sergey Shaposhnikov, Florentina Georgescu, Liliana Adriana Pairault, Luminița Marin, Călin Deleanu and Florin Oancea
Chem. Proc. 2022, 7(1), 16; https://doi.org/10.3390/chemproc2022007016 - 1 Mar 2022
Viewed by 1458
Abstract
Besides multiple benefits, high-residue farming systems have drawbacks: delayed development of the plant in early stages, nutrient availability, and enhanced risks for soil-borne diseases [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 216 KiB  
Abstract
Effect of Nanocellulose Type on the Properties of a Bio-Based Epoxy System
by Marius-Stelian Popa, Celina Maria Damian, Brîndușa Bãlãnucã, Denis Mihaela Panaitescu, Augusta Raluca Gabor, Cristian Andi Nicolae, Valentin Rădiţoiu, Monica Florentina Raduly and Adriana Nicoleta Frone
Chem. Proc. 2022, 7(1), 17; https://doi.org/10.3390/chemproc2022007017 - 2 Mar 2022
Viewed by 1332
Abstract
With the continuous depletion of fossil oils and resulting environmental concerns, there is an urgent need to develop polymeric materials from renewable resources [1,2]. Epoxy resins are thermoset polymers that are recognized for their tunable properties (adhesiveness, tensile and electrical strength, stiffness, heat [...] Read more.
With the continuous depletion of fossil oils and resulting environmental concerns, there is an urgent need to develop polymeric materials from renewable resources [1,2]. Epoxy resins are thermoset polymers that are recognized for their tunable properties (adhesiveness, tensile and electrical strength, stiffness, heat and chemical resistance) and for their various industrial and domestic applications. Still, the main drawback of epoxy resin is its brittleness. Thus, the addition of functional vegetable oils, such as epoxidized linseed oil (ELO), can improve the toughness of epoxy resin, while increasing the bio-based content of the final materials [1]. The goal of this work is to study the influence of composition, cross-linking conditions, and addition of reinforcing agents on the properties of a bio-based epoxy resin, obtained from epoxidized linseed oil (ELO), and a commercial hardener. Nanocellulose from common sources (microcrystalline cellulose MC) and agro-industrial residues (plum seeds shells-SC) were used as fillers in the epoxy-systems. Epoxidized linseed oil (ELO, TRAQUISA, Barcelona, Spain), Epilox—Hardener H 10–30 (G) (NANOCHEM, București, Romania), microcrystalline cellulose (MC) (20 μm, Aldrich, St. Louis, MO, USA) and plum seed cellulose (SC) (laboratory obtained via acidic hydrolysis) were used as raw materials. A 2/1 weight ratio of ELO/G was used to obtain the cross-linked materials. Two types of cellulosic modifiers, MC and SC, were used to reinforce the epoxy systems. The resulted epoxy composite systems were characterized by means of FT-IR, TGA, DMA and water contact angle analysis. TGA analysis showed that the onset and maximum degradation temperatures were increased upon employing an extra cross-linking step at 140 °C or by addition of the cellulosic fillers. Moreover, an increase in the storage modulus of the final epoxy systems was attained as a result of the addition of cellulosic filler, as seen in the DMA results. The addition of a low-weight percentage (0.5%) of cellulose modifiers (MC and SC) enhanced the thermal stability of the epoxy system and had a reinforcing effect by increasing the storage modulus of the final materials. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 725 KiB  
Abstract
Antioxidant and Anti-Inflammatory Potential of Populus nigra L. Buds
by Alice Grigore, Virginia Vulturescu and Georgeta Neagu
Chem. Proc. 2022, 7(1), 18; https://doi.org/10.3390/chemproc2022007018 - 2 Mar 2022
Cited by 1 | Viewed by 1334
Abstract
Populus nigra L [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 761 KiB  
Abstract
Recovery of Waste Industrial Waters Containing Red Congo by Multifunctionalized Mesoporous Silica Nanomaterials
by Ion Fratilescu and Eugenia Fagadar-Cosma
Chem. Proc. 2022, 7(1), 19; https://doi.org/10.3390/chemproc2022007019 - 2 Mar 2022
Cited by 1 | Viewed by 1311
Abstract
Introduction: Colored wastewaters, containing toxic dyes, such as Congo red, methylene blue, malachite green, fuchsine B, bromothymol blue, must first focus on the removal of dyes, before any other recovery treatment [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 177 KiB  
Abstract
Burned Clay Ceramics Used in Water Treatment
by Andrei Victor Sandu
Chem. Proc. 2022, 7(1), 20; https://doi.org/10.3390/chemproc2022007020 - 3 Mar 2022
Viewed by 1043
Abstract
This research is the result of a detailed study performed on construction bricks and traditional ceramics of fired clay involved in water treatments as the last stage of filtration after the active charcoal [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 426 KiB  
Abstract
Phytotoxicity of Clematis vitalba L. (Ranunculaceae) Aqueous Extract and Nanostructured Mixture
by Nicoleta Anca Şuțan, Codruța Mihaela Dobrescu, Oana Alexandra Drăghiceanu, Irina Fierăscu, Radu Claudiu Fierăscu, Claudiu Şuțan and Liliana Cristina Soare
Chem. Proc. 2022, 7(1), 21; https://doi.org/10.3390/chemproc2022007021 - 3 Mar 2022
Viewed by 1281
Abstract
Known in traditional medicine as a good source for the treatment of various diseases, [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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4 pages, 904 KiB  
Abstract
Synthesis of Silver Nanoparticles Embedded in Micro-Hydrogel Particles by Electron Beam Irradiation
by Ioana Ion, Elena Stancu, Ciprian Mihai Mitu, Virgil Marinescu, Eduard Marius Lungulescu and Nicoleta Oana Nicula
Chem. Proc. 2022, 7(1), 22; https://doi.org/10.3390/chemproc2022007022 - 3 Mar 2022
Cited by 2 | Viewed by 1345
Abstract
This study focuses on synthesizing a hybrid micro-hydrogel with antibacterial properties by electron beam irradiation. The micro-hydrogel matrix is based on biocompatible polymer poly(vinyl)alcohol functionalized with antibacterial compounds: graphene oxide and silver nanoparticles The polymer composites were synthesized by irradiation with an electron [...] Read more.
This study focuses on synthesizing a hybrid micro-hydrogel with antibacterial properties by electron beam irradiation. The micro-hydrogel matrix is based on biocompatible polymer poly(vinyl)alcohol functionalized with antibacterial compounds: graphene oxide and silver nanoparticles The polymer composites were synthesized by irradiation with an electron beam at 10, 25, 50 kGy absorbed dose to form silver nanoparticles. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 191 KiB  
Abstract
Emulsifying Effect of Fulvic Acids from Shilajit
by Denisa-Ioana Gheorghe, Diana Constantinescu-Aruxandei, Carmen Lupu and Florin Oancea
Chem. Proc. 2022, 7(1), 23; https://doi.org/10.3390/chemproc2022007023 - 7 Mar 2022
Cited by 3 | Viewed by 2297
Abstract
Shilajit, also known in the north of India as salajit, shilajatu, mimie, or mummiyo, is a blackish-brown powder or an exudate from high mountain rocks, especially in the Himalayans mountains between India and Nepal [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 491 KiB  
Abstract
In Silico Approach toward Analysing the Bioactive Effects of Spent Brewery Yeast Proteins
by Grigore-Mihăiță Stan, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 24; https://doi.org/10.3390/chemproc2022007024 - 7 Mar 2022
Viewed by 1111
Abstract
Saccharomyces cerevisiae, a yeast widely used in food and beverage production, was observed to provide a valuable source of different nutrients, the most important being the bioactive peptides which can become a major supporter in pharmaceutical therapies [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 193 KiB  
Abstract
Experimental Model for High-Throughput Screening of Microalgae Strains Useful for CO2 Fixation
by Eliza-Gabriela Mihaila, Daria Gabriela Popa, Maria Daria Dima, Ioana Marcela Stoian, Cristian Florian Dinca, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 25; https://doi.org/10.3390/chemproc2022007025 - 7 Mar 2022
Viewed by 1291
Abstract
In this study, we developed an experimental model for microalgae cultivation and CO2 fixation [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 178 KiB  
Abstract
Screening Method for Microalgae with Bioremediation and Plant Biostimulant Potential
by Daria-Gabriela Popa, Eliza-Gabriela Mihaila, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 26; https://doi.org/10.3390/chemproc2022007026 - 7 Mar 2022
Viewed by 1256
Abstract
Introduction: During the last decades, the high potential of microalgal products in different industrial and agricultural fields has been demonstrated [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 186 KiB  
Abstract
Closing the Loop in an Efficient Manner—The Feed-Forward Control Solution
by Angela Moraru, Anca Oancea, Marius Ghiurea, Naomi Tritean and Florin Oancea
Chem. Proc. 2022, 7(1), 27; https://doi.org/10.3390/chemproc2022007027 - 7 Mar 2022
Viewed by 1153
Abstract
The Romanian economy is dominated by linear value-chains [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 213 KiB  
Abstract
The Influence of Strigolactone Analog and Mimetic on Trametes versicolor 
by Ioana-Alexandra Bala, Bogdan Trică, Florentina Georgescu, Emilian Georgescu, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 28; https://doi.org/10.3390/chemproc2022007028 - 8 Mar 2022
Cited by 1 | Viewed by 1098
Abstract
Strigolactones (SLs) are apocarotenoids, belonging to carotenoid-derivative metabolites that include other phytohormones, signaling molecules, and volatile compounds [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 181 KiB  
Abstract
Bioaccumulation Potential of Selenium Nanoparticles
by Florin Oancea
Chem. Proc. 2022, 7(1), 29; https://doi.org/10.3390/chemproc2022007029 - 8 Mar 2022
Viewed by 1108
Abstract
Selenium is an essential poison with a very narrow physiological window [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 198 KiB  
Abstract
Clastogenic Effects of Thyme Essential Oil on Vicia faba
by Victoria Bînzari, Denisa-Ioana Gheorghe, Carmen Lupu, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 30; https://doi.org/10.3390/chemproc2022007030 - 8 Mar 2022
Viewed by 1278
Abstract
Indiscriminate use of pesticides in agriculture has many negative implications on both abiotic and biotic components of the environment [1]. One of the alternative methods to maintaining productivity and quality of life is using compounds produced by the secondary metabolism of [...] Read more.
Indiscriminate use of pesticides in agriculture has many negative implications on both abiotic and biotic components of the environment [1]. One of the alternative methods to maintaining productivity and quality of life is using compounds produced by the secondary metabolism of plants, such as essential oils [2]. Due to their rapid efficacy and degradability, essential oils are used as bioherbicides, biostimulants, anti-microbial agents, insect repellents, etc. Evaluations of essential oils toxic, cytotoxic, and genotoxic potentials employing ecotoxicological bioassays are of great importance in determining possible risks [3]. To determine genotoxicity and clastogenic effects of various factors, mitotic divisions are used, with the evaluated parameters being the mitotic index (MI) and the frequency of micronuclei [4]. This study aims to analyze the potential phytotoxic effect of thyme essential oil given its potential use as a plant biostimulant. This phytotoxic assay was done by investigating the clastogenic effect on Vicia faba root meristems. After sterilization, seeds were left to hydrate for 24 h in sterile water. Sterile deionized water was used for the control variant and thyme essential oil at a 0.1% concentration for the sample. The seed plates were placed at 23 °C under dark conditions until the length of rootlets reached 2–3 cm. For cytological analysis of the mitotic index (MI) and micronucleus (MN) tests, 1–2 cm of rootlets were subjected to Carnoy fixation solution for 24 h. The samples were then rinsed with distilled water and hydrolyzed with 1N HCl at 60 °C for 6 min. Schiff’s reagent was used for staining. The mitotic index was calculated as the number of cells in mitosis divided by the total number of cells, x 100, per 1000 scored cells/sample resulting from 10 separate roots for each group. The mitotic index of Vicia faba in the 0.1% essential oil sample did not show significant differences compared to the control sample. The mean values of MI were 31.4% for the control and 31.2% for the sample with thyme essential oil, indicating a similar cell division ratio. Additionally, this essential oil concentration did not significantly lead to micronuclei formation at root meristems relative to the control. Various types of physiological (C-metaphase, stickiness, bridge, laggard, etc.) and clastogenic chromosomal aberrations (chromosomal breaks, fragments, etc.) were not observed when analyzing the cell division phases. Following the study performed on Vicia faba, it was noted that 0.1% thyme essential oil has no cytotoxic effect, as no chromosomal aberrations were observed in the samples, and it did not induce the inhibition of cell proliferation in root meristems. The relative frequencies of the various mitotic phases were not affected by thyme essential oil. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 182 KiB  
Abstract
In Vitro Antioxidant Activity Determination of a Microencapsulated Synergic Polyphenols—Polysaccharide Mixture
by Elena Mihai, Teodora Ciucan, Andreea Iosageanu, Viorica Coroiu, Ana-Maria Gheorghe, Ana Maria Ghenea, Stefania Adelina Milea and Anca Oancea
Chem. Proc. 2022, 7(1), 31; https://doi.org/10.3390/chemproc2022007031 - 9 Mar 2022
Viewed by 1274
Abstract
The aim of this work was to obtain a mixture of polyphenols and polysaccharides, extracted from forest fruit pomace (a side stream of forest fruit juice production) and chia seeds with a synergic antioxidant activity that will be further encapsulated and used in [...] Read more.
The aim of this work was to obtain a mixture of polyphenols and polysaccharides, extracted from forest fruit pomace (a side stream of forest fruit juice production) and chia seeds with a synergic antioxidant activity that will be further encapsulated and used in a fortified protein bar [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 174 KiB  
Abstract
Flow Chemistry for Developing Plant Biostimulants: Designed Grafting of Hydroxycinnamic Acids to Chitosan
by Ioana Silvia Hosu, Luminita Dimitriu, Ioana Bala, Diana Constantinescu-Aruxandei, Ovidiu Dima and Florin Oancea
Chem. Proc. 2022, 7(1), 32; https://doi.org/10.3390/chemproc2022007032 - 9 Mar 2022
Viewed by 1232
Abstract
A plant biostimulant (PBs) is any substance or microorganism applied to plants and intended to enhance nutrition efficiency, abiotic stress tolerance, and/or crop quality traits, regardless of its nutrient content [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 181 KiB  
Abstract
Composition, Antioxidant, and Antifungal Properties of Lavender Floral Waters
by Elena Mihai, Teodora Ciucan, Alexandra Gaspar-Pintiliescu, Ana-Maria Prelipcean, Ruxandra Elena Anton, Adriana Florina Popescu, Mariana Popescu and Oana Craciunescu
Chem. Proc. 2022, 7(1), 33; https://doi.org/10.3390/chemproc2022007033 - 9 Mar 2022
Viewed by 1233
Abstract
During essential oil preparation from aromatic plants, floral waters or hydrosols or hydrolates are obtained as by-products presenting inhibitory effects on phytopathogenic fungi growth, while avoiding the main problem of soil accumulation observed for currently used fungicides [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 184 KiB  
Abstract
Obtaining Protein Hydrolysates from Hemp Seeds
by Diana Pasarin, Camelia Rovinaru and Catalin Matei
Chem. Proc. 2022, 7(1), 34; https://doi.org/10.3390/chemproc2022007034 - 9 Mar 2022
Cited by 1 | Viewed by 1536
Abstract
Hemp (Cannabis sativa ssp [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 180 KiB  
Abstract
Applications of Deep Eutectic Solvents for Lignin Extraction
by Ioana Popa-Tudor, Victor Alexandru Faraon, Florin Oancea and Diana Constantinescu-Aruxandei
Chem. Proc. 2022, 7(1), 36; https://doi.org/10.3390/chemproc2022007036 - 9 Mar 2022
Viewed by 1208
Abstract
Deep eutectic solvents (DESs) represent a new class of compounds with properties similar to ionic liquids, that have a significantly lower boiling point compared to the boiling point of each component, as well as practical applications on extractions from lignocellulosic biomass [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 179 KiB  
Abstract
Formulation of Pullulan Acetate Nanoparticles Loaded with 5-fluorouracil
by Ramona-Daniela Pavaloiu, Fawzia Sha’at, Cristina Hlevca, Oana Gherghescu, Mousa Sha’at, Claudia Sevcenco, Maria Petrescu, Mihaela Eremia and Misu Moscovici
Chem. Proc. 2022, 7(1), 37; https://doi.org/10.3390/chemproc2022007037 - 11 Mar 2022
Cited by 1 | Viewed by 1345
Abstract
Introduction: The aim of this study was to obtain and characterize pullulan acetate-based nanoparticles, loaded with an anticancer agent, 5-fluorouracil (5-FU) [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 171 KiB  
Abstract
Biocatalytic Acylation of Menthol with Fatty Acids in Deep Eutectic Solvent as Reaction Environment
by Florentina Olanescu and Madalina Tudorache
Chem. Proc. 2022, 7(1), 38; https://doi.org/10.3390/chemproc2022007038 - 11 Mar 2022
Viewed by 1192
Abstract
For decades, the administration of transdermal drugs has been accepted as a possible route of noninvasive administration, with advantages of prolonged therapeutic action, low side effects, easy use, and better patient compliance [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 452 KiB  
Abstract
Synthesis and Nonlinear Optical Studies of N-Containing Heterocyclic Compounds
by Maria Marinescu, Maria Antonia Tănase, Ludmila-Otilia Cinteză, Ioana Cătălina Gȋfu, Sabina Georgiana Burlacu and Cristian Petcu
Chem. Proc. 2022, 7(1), 39; https://doi.org/10.3390/chemproc2022007039 - 11 Mar 2022
Viewed by 1240
Abstract
Introduction: The organic compounds which contain a “push–pull” system, that means a couple donor (D)–acceptor (A) connected to a system which contributes to the delocalization of the π-electrons, define the classic structures with optical response due to large hyperpolarizabilities [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 205 KiB  
Abstract
Synthesis, Characterization and Antimicrobial Activities of Some Schiff Bases with Non-Linear Optical Applications
by Maria Marinescu, Ludmila-Otilia Cinteză, Claudia-Valentina Popa, Ioana Cătălina Gȋfu, Sabina Georgiana Burlacu and Cristian Petcu
Chem. Proc. 2022, 7(1), 40; https://doi.org/10.3390/chemproc2022007040 - 11 Mar 2022
Cited by 1 | Viewed by 1093
Abstract
Introduction: Schiff bases or imine compounds are considered a very remarkable category of organic compounds because of their π-delocalized structure and because of their pharmacological properties [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 179 KiB  
Abstract
Potential Application of Apatitic Materials Substituted with Co and Zn as Antimicrobial Treatment in the Preservation of Cultural Heritage
by Toma Fistos, Roxana Ioana Brazdis, Anda Maria Baroi, Irina Fierascu, Lia-Mara Ditu, Valentin Raditoiu and Radu Claudiu Fierascu
Chem. Proc. 2022, 7(1), 41; https://doi.org/10.3390/chemproc2022007041 - 16 Mar 2022
Viewed by 1087
Abstract
Cultural heritage has a major importance, as it represents human identity and evidence of existence and activities that people have left over time [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 192 KiB  
Abstract
Use of Bacterial Carbonatogenesis for Construction Materials
by Iuliana Raut, Mariana Constantin, Elvira Alexandrescu, Claudia Ninciuleanu, Monica Raduly, Ana-Maria Gurban, Mihaela Doni, Ionela Petre, Cristian Andi Nicolae, Nicoleta Radu, Gelu Vasilescu and Luiza Jecu
Chem. Proc. 2022, 7(1), 42; https://doi.org/10.3390/chemproc2022007042 - 16 Mar 2022
Cited by 1 | Viewed by 1108
Abstract
Concrete is the most used construction material, but its industrial production from lime consumes 2–3% of the global energy demand, generating 0 [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 201 KiB  
Abstract
The Effects of Light on the Enzyme Production of Trichoderma atroviride
by Ioana-Alexandra Bala, Naomi Tritean, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 43; https://doi.org/10.3390/chemproc2022007043 - 16 Mar 2022
Viewed by 1440
Abstract
The behavior of living organisms is influenced by sunlight, which is an environmental key factor [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 423 KiB  
Abstract
Evaluation of PVA-Based Cryogels in the Cleaning Process of Contemporary Acrylic Paintings
by Dan Adrian Vasile, Claudiu Eduard Rizescu, Ionut Octavian Zaulet, Irisz Vincze, Laurentiu Marin and Rodica-Mariana Ion
Chem. Proc. 2022, 7(1), 44; https://doi.org/10.3390/chemproc2022007044 - 18 Mar 2022
Viewed by 1099
Abstract
Introduction: History can be defined as the study of people who have lived in the past [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 179 KiB  
Abstract
The Effects of Different Temperature Conditions on Marble Properties
by Claudiu Eduard Rizescu, Ionut-Octavian Zaulet, Dan Adrian Vasile, Irisz Vincze, Laurentiu Marin and Rodica Mariana Ion
Chem. Proc. 2022, 7(1), 45; https://doi.org/10.3390/chemproc2022007045 - 18 Mar 2022
Cited by 1 | Viewed by 1177
Abstract
Introduction: The term marble derives from ancient Greek and has the meaning of “shining stone” [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 167 KiB  
Abstract
Carbon Nanomaterials from Biomass Wastes
by Stefan-Ovidiu Dima, Georgiana Ispas, Valentin Raditoiu, Radu-Claudiu Fierascu, Cristian-Andi Nicolae, Bogdan Trica and Florin Oancea
Chem. Proc. 2022, 7(1), 46; https://doi.org/10.3390/chemproc2022007046 - 22 Mar 2022
Viewed by 1234
Abstract
Biomass represents carbon that has been sequestered from the environment by plants through photosynthesis and nutrition [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 169 KiB  
Abstract
Nanostructured Carbon Adsorbents for Water Depollution
by Stefan-Ovidiu Dima, Radu-Claudiu Fierascu, Monica Raduly, Valentin Raditoiu, Rusandica Stoica, Luiza Capra and Bogdan Trica
Chem. Proc. 2022, 7(1), 47; https://doi.org/10.3390/chemproc2022007047 - 22 Mar 2022
Viewed by 1123
Abstract
Carbon materials, especially nanostructured ones, have well-known adsorbent properties due to their ability to establish covalent bonds, hydrogen bonds, hydrophobic, electrostatic, and π-π interactions [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 878 KiB  
Abstract
Green Synthesis of Bimetallic Nanostructures Using Vine Shoot Extracts—Characterization and Antimicrobial Effects
by Anda Maria Baroi, Radu Claudiu Fierascu, Toma Fistos, Roxana Ioana Brazdis, Raluca Somoghi, Lia-Mara Ditu and Irina Fierascu
Chem. Proc. 2022, 7(1), 48; https://doi.org/10.3390/chemproc2022007048 - 22 Mar 2022
Viewed by 1355
Abstract
In order to obtain high quality grapes, necessary for the wine industry, table grapes or other by-products, different management techniques are applied to the vine crops. The pruning is a common practice that generates massive amounts of waste, especially shoots and canes that [...] Read more.
In order to obtain high quality grapes, necessary for the wine industry, table grapes or other by-products, different management techniques are applied to the vine crops. The pruning is a common practice that generates massive amounts of waste, especially shoots and canes that may affect the environment and also the human health. On the other hand, various scientific studies confirm the presence of phytochemicals (antioxidants) in grapevine waste being used as a natural added-value in food, pharmaceutical and cosmetic industries due to their benefits. The nanoparticle phytosynthesis is a safe, non-toxic and environment friendly approach in which the phytochemicals from vine waste extracts act as reducing agents. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 161 KiB  
Abstract
Conventional versus Modern—Novel Materials in Environmental Depollution
by Roxana-Ioana Brazdis, Anda Maria Baroi, Irina Fierascu, Toma Fistos and Radu Claudiu Fierascu
Chem. Proc. 2022, 7(1), 49; https://doi.org/10.3390/chemproc2022007049 - 23 Mar 2022
Viewed by 1274
Abstract
With the development of human activities, industries and agriculture, water pollution has become a challenging problem since decades. Most of the pollutants found in water bodies are environmentally persistent and resistant to conventional wastewater treatments. Heavy metals, occupying a significant place in the [...] Read more.
With the development of human activities, industries and agriculture, water pollution has become a challenging problem since decades. Most of the pollutants found in water bodies are environmentally persistent and resistant to conventional wastewater treatments. Heavy metals, occupying a significant place in the category of inorganic pollutants, are non-biodegradable and tend to accumulate in living organisms, causing biological and physical complications such as liver, lungs and nervous system disfunctions. Nanoscale adsorbents are a sustainable and safe method for heavy metals’ removal from polluted water, due to their high adsorption capacity and stability. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 180 KiB  
Abstract
Next Generation of Bee Feed by Biomimetic Formulation of a Hydrocinnamic Acid
by Luminița Dimitriu, Andreea Ecaterina Constantin, Andra Nichetean, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 50; https://doi.org/10.3390/chemproc2022007050 - 23 Mar 2022
Viewed by 1244
Abstract
Honeybees, Apis mellifera, play an important role in the global ecology and economy [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 414 KiB  
Abstract
Effect of Humic Acids from Biomass Biostimulant on Microalgae Growth
by Victor Alexandru Faraon, Daria Gabriela Popa, Ioana Tudor-Popa, Eliza Gabriela Mihăilă and Florin Oancea
Chem. Proc. 2022, 7(1), 51; https://doi.org/10.3390/chemproc2022007051 - 23 Mar 2022
Viewed by 1397
Abstract
In this work, HAs were obtained by humification of lignin that was extracted from beer spent grain (BSG) obtained from beer fabrication with deep eutectic solvents (DESs). The humification process used in this case was reacting the BSG-extracted lignin with hydrogen peroxide in [...] Read more.
In this work, HAs were obtained by humification of lignin that was extracted from beer spent grain (BSG) obtained from beer fabrication with deep eutectic solvents (DESs). The humification process used in this case was reacting the BSG-extracted lignin with hydrogen peroxide in the presence of ferric sulphate heptahydrate. The biostimulant effect of HAs was tested on the Chlorella Sorokiniana microalgae species. Additionally, biostimulant tests were conducted using a commercial product containing HAs (BlackJak, BJK) and a coal-extracted lignosulphonate (LsNa). Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 162 KiB  
Abstract
Biocatalytic Preparation of Perillic Derivatives as an Alternative to Limonene Valorization
by Stefania-Alexandra Voicea and Madalina Tudorache
Chem. Proc. 2022, 7(1), 52; https://doi.org/10.3390/chemproc2022007052 - 23 Mar 2022
Viewed by 1382
Abstract
Perillic-type derivatives of limonene from the class of the oxygenated derivatives have not been effectively utilized to date, despite the large number of applications that they can fulfill based on their phytochemical properties [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 198 KiB  
Abstract
Optimized Extraction of Glycoproteins from Ganoderma lucidum
by Naomi Tritean, Ștefan-Ovidiu Dima, Anisoara Cimpean, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 53; https://doi.org/10.3390/chemproc2022007053 - 23 Mar 2022
Viewed by 1225
Abstract
Ganoderma mushrooms are a valuable source of bioactive compounds [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 199 KiB  
Abstract
Optimization of Enzyme Production of Trichoderma atroviride Using Response Surface Methodology
by Naomi Tritean, Ioana-Alexandra Bala, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 54; https://doi.org/10.3390/chemproc2022007054 - 23 Mar 2022
Viewed by 1330
Abstract
Trichoderma atroviride is a well-known filamentous fungus used as biocontrol due to its capacity to produce various enzymes that degrade the cell wall of phytopathogenic fungi [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 203 KiB  
Abstract
The Effect of Graphene Nanoplatelets on the Properties of Hybrid Polyamide/Glass Fiber Composites
by Andreea Afilipoaei, Zina Vuluga, George-Mihail Teodorescu, Monica Cărăulașu, Augusta Raluca Gabor, Cristian Andi Nicolae and Mihai Cosmin Corobea
Chem. Proc. 2022, 7(1), 55; https://doi.org/10.3390/chemproc2022007055 - 24 Mar 2022
Viewed by 1287
Abstract
Currently, the method of solving the issues related to the environment has become a topic of great interest and is approached by researching several directions, such as recycling or the replacement of polluting materials [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 199 KiB  
Abstract
Methods of Obtaining Extracts from Hedera helix L. Leaves and Evaluation of the Total Saponins Content
by Rodica Tatia, Lucia Moldovan, Isabela Tarcomnicu, Anca Daniela Raiciu, Adina Gavrila, Ioan Calinescu and Christina Zalaru
Chem. Proc. 2022, 7(1), 56; https://doi.org/10.3390/chemproc2022007056 - 24 Mar 2022
Cited by 1 | Viewed by 2304
Abstract
Hedera helix L. is known for its therapeutic properties, such as analgesic, anti-inflammatory, expectorant activity. It is currently known that the characteristic therapeutic effects of ivy extracts are induced by phytocompunds, such as: saponins (hederagenin, α and β-hederin, hederacoside B and C), phytosterols [...] Read more.
Hedera helix L. is known for its therapeutic properties, such as analgesic, anti-inflammatory, expectorant activity. It is currently known that the characteristic therapeutic effects of ivy extracts are induced by phytocompunds, such as: saponins (hederagenin, α and β-hederin, hederacoside B and C), phytosterols (sitosterol, stigmasterol, campesterol), flavonoids, falcarinol, falcarinone, scopoline, chlorogenic acid, caffeic acid, phytoestrogens [1]. The purpose of our study was to evaluate the total saponin content of Hedera helix L. leaves extracts obtained by both conventional, and unconventional methods. The commercial fresh leaves of Hedera helix L. were purchased from Hofigal SA, Romania. The following reagents used for testing were α-hederin, hederagenin, and hederacoside C at purity ≥98% (HPLC), DMSO were purchased from Sigma Aldrich. The chemical composition of the obtained extracts was analyzed by HPLC-MS/MS, and the total saponin content was evaluated [2,3]. Our study indicated an optimal method for obtaining Hedera helix L. leaves extract with an enriched saponin content. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 197 KiB  
Abstract
Effect of Humic Acids from Biomass Biostimulant on Microalgae Growth
by Victor Alexandru Faraon, Daria Gabriela Popa, Ioana Tudor-Popa, Eliza Gabriela Mihăilă and Florin Oancea
Chem. Proc. 2022, 7(1), 57; https://doi.org/10.3390/chemproc2022007057 - 28 Mar 2022
Viewed by 1445
Abstract
Humic substances (HSs) are formed by chemical and biological transformations of vegetal and animal biomass through microbial metabolism, representing a major organic carbon source at the soil’s surface. They contribute to the adjustment of many major ecological processes. For example, HSs enhance plant [...] Read more.
Humic substances (HSs) are formed by chemical and biological transformations of vegetal and animal biomass through microbial metabolism, representing a major organic carbon source at the soil’s surface. They contribute to the adjustment of many major ecological processes. For example, HSs enhance plant growth and terrestrial life in general, adjust carbon and nitrogen cycles in the soil, enhance plant and microorganism growth, improve the fate and transportation of anthropogenic compounds and heavy metals and stabilize the soil [1,2]. Scientists define humic acids (HAs) as humic materials that are soluble in aqueous alkaline solutions and that precipitate when the pH is brought to 1–2 [3]. For lignin extraction from BSG, various DESs were used. Humification of the extracted lignin was carried out through a reaction with hydrogen peroxide in the presence of ferric sulphate heptahydrate. Biostimulant tests were conducted at 25 ± 2 °C, illuminating with a fluorescent light lamp at 100 μmol/m2·s (µEinstein), with a light/darkness period of 14/10 h for 9 days up to 2 weeks. Parameters such as turbidity, optic density and chlorophyll content were studied. Concentrations of 10 mg/L and 1 mg/L in the case of reference products BJK and LSNa and of 1 mg/L in the case of the obtained HAs were used. Lignin was extracted with various yields. HAs were identified using FT-IR spectra. HAs derived from lignin had the best biostimulant activity in the period of 9 days for the 0.1 mg/L concentration. The biostimulant effect of various HAs showed promising results in every case, and the Has obtained from lignin had a better effect than the commercial product containing HAs after 9 days. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 182 KiB  
Abstract
Design of Nanoplatforms for Targeted Delivery of Irinotecan
by Ana-Maria Brezoiu, Ana-Maria Prelipcean, Luminița Miclea, Mihaela Moisescu, Mihaela Deaconu, Cristian Matei and Daniela Berger
Chem. Proc. 2022, 7(1), 58; https://doi.org/10.3390/chemproc2022007058 - 31 Mar 2022
Viewed by 1372
Abstract
Irinotecan is an antineoplastic used for the treatment of different types of cancer and solid tumors (rectal, colon, ovarian and glioblastoma) [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 211 KiB  
Abstract
Optimizing the Enzymatic-Assisted Extraction of Aromatic Compounds from Red Wine Lees
by Mălina Deșliu-Avram, Elena Radu, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 59; https://doi.org/10.3390/chemproc2022007059 - 22 Mar 2022
Viewed by 1061
Abstract
In this research, we aimed to optimize the enzymatic-assisted extraction of volatile oily compounds from red wine lees, which give cognac flavor to the wine [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 184 KiB  
Abstract
New Hydrogel Formulations Based on Natural and Synthetic Polymers for Skin Regeneration
by Elena Utoiu, Laura Mihaela Stefan, Teodora Ciucan, Ana Maria Prelipcean, Ana Maria Seciu-Grama, Viorica Coroiu, Anca Oancea and Oana Craciunescu
Chem. Proc. 2022, 7(1), 60; https://doi.org/10.3390/chemproc2022007060 - 2 Apr 2022
Viewed by 1941
Abstract
The skin, which represents about 16% of the total body mass, acts as a protective barrier against external microbial factors [1]. Therefore, damaged tissues, especially burns, require rapid local coverage to avoid infections and to ensure the protective barrier function of [...] Read more.
The skin, which represents about 16% of the total body mass, acts as a protective barrier against external microbial factors [1]. Therefore, damaged tissues, especially burns, require rapid local coverage to avoid infections and to ensure the protective barrier function of the skin [2]. The aim of this study was to design and characterize new hydrogel formulations based on natural and synthetic polymers and that were biodegradable and cytocompatible to serve as temporary dressings with regenerative properties for skin wound healing. The proposed experimental variants of the hydrogels are based on mixtures of gelatin (Gel), sodium alginate (Alg), polyvinyl alcohol (PVA), and methylcellulose (MC1500) in different weight ratios: Gel-Alg (1:0.75, g/g), Gel-Alg-PVA (1:0.27:0.18, g/g/g) and Gel-Alg-MC1500 (1:0.26:0.35, g/g/g). Physicochemical and biochemical characterizations were performed to determine the swelling degree, biodegradation in physiological conditions (pH 7.4, 37 °C) and in the presence of collagenase (mimicking the inflamed wounded milieu), viscosity, and syneresis, while their ultrastructure was investigated by SEM analysis [3]. The L929 murine fibroblast culture was used to assess the in vitro cytocompatibility of the hydrogels after 24 h and 48 h of cultivation using quantitative MTT and LDH assays [4]. Cell morphology was observed in treated cultures by light microscopy after Giemsa staining. The physicochemical and biochemical analyses indicated that the novel polymeric hydrogels variants had a good swelling capacity due to the presence of Alg, had an adjustable viscosity, and controlled biodegradation over time in both physiological and inflamed conditions. Two mixture variants were outlined: Gel-Alg-PVA with reduced porosity and low biodegradability over time and Gel-Alg-MC1500 with increased porosity and higher biodegradation over time, even in the physiological environment. The SEM morphology observations showed that the hydrogels had a dense and microporous structure, with pores of irregular shapes and sizes, which could ensure skin protection against external microbial agents while also maintaining the required degree of humidity and oxygen exchange with the external environment. In vitro quantitative tests indicated a high degree of cytocompatibility for all of the tested hydrogels, with cell viability percentages higher than 90%. The cell morphology observations revealed that in the presence of hydrogel samples, the L929 murine fibroblasts maintained their normal phenotype, and the cell density was similar to that of the negative control (untreated cells). Overall, our findings indicated that the hydrogels containing synthetic polymers (Gel-Alg-PVA, Gel-Alg-MC1500) had adequate physicochemical, biochemical, and biological properties that should be further tested to determine their role as biomaterials for skin tissue engineering applications. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 157 KiB  
Abstract
Hybrid Cryogels with Advanced Adsorbent Properties for Penicillin
by Marinela-Victoria Dumitru, Teodor Sandu, Iulia Elena Neblea, Horia Iovu, Anita-Laura Chiriac, Ionut Cristian Radu, Andrei Sarbu and Tanta Verona Iordache
Chem. Proc. 2022, 7(1), 61; https://doi.org/10.3390/chemproc2022007061 - 2 Apr 2022
Viewed by 1202
Abstract
In recent years, natural polymers (chitosan and biocellulose) have sparked interest, especially when it comes to medical uses (wound healing, excipients for drug administration), due to their great biocompatibility and low toxicity [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 170 KiB  
Abstract
Comparative Studies concerning Bioactive Peptides Obtained from Fish By-Products
by Agnes Toma, Simona Savin, Teodora Ciucan, Elena Mihai, Catalina Sanda, Lucia Moldovan and Anca Oancea
Chem. Proc. 2022, 7(1), 62; https://doi.org/10.3390/chemproc2022007062 - 6 Apr 2022
Viewed by 1395
Abstract
Fish byproducts (bone, scale, or skin) contain a wide range of nutritional components, especially proteins and lipids, the most important of all being collagen [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 183 KiB  
Abstract
Novel Composite Hydrogels Based on Natural Components and Akermanite Enriched with Icariin for Osteochondral Healing
by Elena Iulia Oprita, Oana Craciunescu, Orsolya C. Fazakas-Raduly, Reka Barabas, Teodora Ciucan, Ana Maria Seciu-Grama and Anca Oancea
Chem. Proc. 2022, 7(1), 63; https://doi.org/10.3390/chemproc2022007063 - 10 Apr 2022
Viewed by 1691
Abstract
Osteochondral regeneration is a major challenge due to the different composition of cartilage and subchondral bone and different biochemical, biomechanical and biological properties. For this reason, a biomimetic scaffold is necessary to provide different biological signals needed to allow for osteochondral regeneration [ [...] Read more.
Osteochondral regeneration is a major challenge due to the different composition of cartilage and subchondral bone and different biochemical, biomechanical and biological properties. For this reason, a biomimetic scaffold is necessary to provide different biological signals needed to allow for osteochondral regeneration [1]. This study aims to design novel biodegradable cross-linked composite hydrogels based on gelatin and polysaccharidic components (chondroitin-4-sulphate and hyaluronic acid), mixed with akermanite and enriched with small bioactive molecule (icariin). Akermanite was used as a better alternative to conventional ceramics due to its bone-like apatite formation ability and good bioactivity [2]. Icariin (Ica) flavonoid (from traditional Chinese medicine Epimedium herb) was used as substitute for growth factors to enhance cell proliferation and chondrogenic and osteogenic differentiation [3]. Variants of biodegradable cross-linked composite hydrogel based on gelatin, polysaccharidic components (chondroitin-4-sulphate and hyaluronic acid), in two ratios of 2:0.8:0.2 and 2:0.08:0.02 (w/w/w), were developed and mixed with akermanite, at a ratio of 2:1 (w/w). Subsequently, both composite hydrogel variants were cross-linked with (N,N-(3-dimethylaminopropyl)-N-ethyl carbodiimide (EDC) and enriched with small bioactive molecule (icariin). The obtained cross-linked composite hydrogel variants enriched with Ica were characterized related to enzymatic biodegradation (type I collagenase), swelling capacity, degree of cross-linking (TNBS assay), and morphology (SEM). Their cytocompatibility was evaluated by analyses of cell viability and cellular cycle (flow cytometry), cell proliferation (Neutral Red assay), and cell adhesion to composite hydrogels (SEM) using NCTC clone L929 cell line. The final results show that both cross-linked composite hydrogel variants enriched with Ica presented optimal physicochemical and structural properties to be used as a scaffold for osteochondral healing. Our data did not reveal any toxicity of composite hydrogels in the NCTC cell line within the tested range of concentrations (10–50 mg/mL). Additionally, cells were capable of spreading and proliferating on the surface of composite hydrogels. The designed biodegradable cross-linked composites enriched with Ica are recommended for further studies as natural temporary scaffolds, which can allow both cartilage and subchondral regeneration with implications for the management of osteochondral healing. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 414 KiB  
Abstract
Hybrid Materials Based on Multi-Walled Carbon Nanotubes and TiO2 Nanoparticles with Antimicrobial Properties †
by Madalina Elena David, Rodica Mariana Ion, Lorena Iancu, Ramona Marina Grigorescu, Alina Maria Holban, Raluca Somoghi, Adrian Ionut Nicoara, Bogdan Spurcaciu and Anca Irina Gheboianu
Chem. Proc. 2022, 7(1), 64; https://doi.org/10.3390/chemproc2022007064 - 13 Apr 2022
Viewed by 1405
Abstract
Worldwide, one of the most significant threats to human health problems remains antibiotic resistance [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 180 KiB  
Abstract
Lipase Enzyme for Biomass Valorization
by Madalina Tudorache
Chem. Proc. 2022, 7(1), 65; https://doi.org/10.3390/chemproc2022007065 - 20 Apr 2022
Viewed by 1424
Abstract
Lipase enzymes are part of the hydrolases family acting on carboxylic ester bonds [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 180 KiB  
Abstract
Bioinformatics Supported Liquid Chromatography–Mass Spectrometry for Characterization of Bacterial Metabolites
by Elwira Sieniawska
Chem. Proc. 2022, 7(1), 66; https://doi.org/10.3390/chemproc2022007066 - 20 Apr 2022
Cited by 1 | Viewed by 1187
Abstract
Metabolomics enables the comprehensive characterization of the set of low-molecular-weight compounds that are starting, intermediate, or end products of metabolic transformations in living organisms [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 180 KiB  
Abstract
Functionalized Β-Cyclodextrin for Smart Drug Delivery Application
by Elena-Ruxandra Radu, Cristina Stavarache, Andreea Madalina Pandele and Stefan Ioan Voicu
Chem. Proc. 2022, 7(1), 67; https://doi.org/10.3390/chemproc2022007067 - 21 Apr 2022
Viewed by 1434
Abstract
In recent years, an emphasis has been established on advanced cancer drug delivery, in order to improve the efficiency of the cancer therapy [1]. Cyclodextrin (CD) is a cyclic oligosaccharide formed by 6, 7, or 8 glucose units by α-1,4 glycosidic bonds, which [...] Read more.
In recent years, an emphasis has been established on advanced cancer drug delivery, in order to improve the efficiency of the cancer therapy [1]. Cyclodextrin (CD) is a cyclic oligosaccharide formed by 6, 7, or 8 glucose units by α-1,4 glycosidic bonds, which are called α, β, γ-cyclodextrin, respectively [2]. Due to its hollow truncated morphology with a hydrophobic inside and hydrophilic outside, CD has been studied in numerous drug delivery systems [3–5]. In the present study, the modification of β-CD with 3-(Aminopropyl)triethoxysilane (APTES) was investigated. For this study we used: β-Cyclodextrin (β-CD) purchased from Fluka, 3-(Aminopropyl) triethoxysilane (APTES) from Sigma Aldrich, NaOH from Roth, dimethylforamide (DMF) from Acros Organics, and acetone from Chimreactiv. Firstly, NaOH, APTES, and DMF were solubilized by magnetic stirring for 1 h at 40 °C. After solubilization, β-CD was added and allowed to react for 2 h, at 40 °C, under magnetic stirring. The functionalized β-CD was precipitated in acetone, and in the end washed and filtered. The sample was dried at room temperature and investigated by NMR. The 1H NMR was employed to further demonstrate the molecular structure of β-CD. The obtained NMR spectrum of β-CD shows the presence of characteristic proton peaks. The chemical structure of functionalized β-CD was studied, in order to look for possible biomedical applications, such as smart drug delivery systems. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 679 KiB  
Abstract
Development of Safe Nanoagrochemicals—The Nanoporous Route
by Florin Oancea
Chem. Proc. 2022, 7(1), 68; https://doi.org/10.3390/chemproc2022007068 - 25 Apr 2022
Viewed by 1411
Abstract
Nanoagrochemicals have the advantages of enhanced bioavailability of active ingredients and targeted delivery [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 366 KiB  
Abstract
Hydrogels Based on Polysaccharides Grafted Ferulic Acid: A Biomimetic Approach
by Ahdi Hadrich, Didier Le Cerf, Virginie Dulong and Luc Picton
Chem. Proc. 2022, 7(1), 69; https://doi.org/10.3390/chemproc2022007069 - 28 Apr 2022
Viewed by 1286
Abstract
Some cereal seeds present mucilage composed of polysaccharides bearing ferulic acid (FA) groups, which are capable of reacting in the presence of an enzyme such as laccase to generate chemical hydrogels [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 170 KiB  
Abstract
Numerical Simulation of Coupled Processes of Membrane Filtration and Advanced Oxidation (AOPs) in Photolysis Reactors for Water Decontamination
by Sorin Claudiu Ulinici, Gabriela Baisan, Grigore Vlad, Adriana Popa and Dana Toloman
Chem. Proc. 2022, 7(1), 70; https://doi.org/10.3390/chemproc2022007070 - 6 May 2022
Viewed by 1481
Abstract
(1) Introduction: Chemical pollutants disposed of various branches of industry pose a significant threat to both the aquatic environment and human health. A specific class of pollutants is given by hardly biodegradable organic compounds coming mainly from pharmaceuticals, personal care products and industrial [...] Read more.
(1) Introduction: Chemical pollutants disposed of various branches of industry pose a significant threat to both the aquatic environment and human health. A specific class of pollutants is given by hardly biodegradable organic compounds coming mainly from pharmaceuticals, personal care products and industrial dyes. These pollutants are identified in water bodies (surface or underground) used as a source of water in drinking water treatment plants, the classic technologies for their elimination being inefficient. Exploring new processes and transposing them on an industrial scale in order to develop innovative, operationally and energy-efficient technologies is a complex approach, supported by both theoretical and experimental investigations, numerical modeling and virtual experiment, being basic steps in shortening the time required and increasing accuracy for developing new methods. (2) Materials and methods: Based on laboratory-level and functional model studies, the combined advanced oxidation processes (by photolysis and photocatalysis) and separation at the interface of photocatalytic ultrafiltrating membranes impregnated with elements based on carbon nanotubes (MWCNTs) decorated with ZnO particles, in the presence of active oxygen species (dissolved ozone), were investigated. The paper presents a methodology and a numerical model for modeling hybrid processes of advanced oxidation and membrane separation in photolysis reactors, as a preliminary step in the development of a water decontamination technology on an industrial scale. The model deals with a coaxial reactor configuration, being based on concepts from fluid mechanics (CFD—Computational Fluid Dynamics) assembled in a multi-physical model that incorporates elements of fluid flow, radiation distribution in the reactor and the dynamics of dissolved ozone photolysis processes, both in the reactor volume and at the filter membrane interface. (3) Results: The results obtained from virtual experiments, at different operating parameters of the reactor allowed the determination of the flow regime in the reactor by highlighting active areas, evaluating the efficiency of disinfection processes and photochemical processes (photolysis, photocatalysis) and by analyzing the reaction dynamics of dissolved ozone in the presence of UV radiation, useful in establishing the technical specifications necessary to make the model on a real scale. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 194 KiB  
Abstract
Mesoporous Silica Nanoreservoirs Loaded with 1-H Benzotriazole for Active Anticorrosion Protection
by Cristina Lavinia Nistor, Sabina Georgiana Burlacu, Cătălin Ionuţ Mihăescu, Cristina Scomoroscenco, Ioana Cătălina Gîfu, Claudia Mihaela Ninciuleanu, Raluca Ianchiş, Cristian Petcu and Elvira Alexandrescu
Chem. Proc. 2022, 7(1), 71; https://doi.org/10.3390/chemproc2022007071 - 6 May 2022
Viewed by 1483
Abstract
In recent years, scientists are paying increased attention to the development of intelligent nanocontainers in applications such as biomedical, catalysis, and anticorrosion [1]. Preparation of anticorrosion coatings containing smart nanocontainers loaded with corrosion inhibitors, which can be initiated when the barrier [...] Read more.
In recent years, scientists are paying increased attention to the development of intelligent nanocontainers in applications such as biomedical, catalysis, and anticorrosion [1]. Preparation of anticorrosion coatings containing smart nanocontainers loaded with corrosion inhibitors, which can be initiated when the barrier coatings are damaged, favor the long-term function, as uncontrolled loss by leaching is inhibited [2]. The aim of the present study is to optimize the amount of an organic inhibitor (1-H benzotriazole (BTA)) that can be in situ encapsulated in a mesoporous silica nanocontainer, prepared by an original sol-gel formulation. Materials and methods: For the synthesis of silica mesoporous, nanoparticles loaded with BTA were used with three silica co-precursors: tetraethylorthosilicate (TEOS), phenyltriethoxysilane (PTES), and octyltriethoxysilane (OTES), at a 5/1/1 gravimetric ratio. The synthesis was carried out in the presence of a solvent (ethanol) and of a surfactant (Igepal CA-630). The pH of the sol–gel system was adjusted to ~9 by dripping an aqueous solution of NH4OH (25%). Prior to the addition to the sol–gel reaction system, BTA was completely dissolved in ethanol. Various amounts of BTA were loaded to the sol–gel systems: 0.25; 0.5; 0.75; 1; 1.25; 1.5; and 2 g (corresponding to 0.09; 0.18; 0.27; 0.35; 0.44; 0.53; and 0.70% grav. of the total amount of sol–gel mixture, respectively). Furthermore, a similar set of samples was prepared in the presence of a constant amount of rhodamine B, dissolved in ethanol. This second set was obtained in order to perform a visual evaluation of the encapsulation efficiency. Particles dimensions, size distributions, and particles charging in the final dispersions were evaluated by the dynamic light scattering (DLS) technique and Zeta potential measurements. Surface morphology was observed by SEM. The structural characteristics of the silica mesoporous particles were investigated by N2 adsorption–desorption analysis on the calcined samples. Results: During the in situ synthesis of silica nanoparticles, the aromatic molecules of the corrosion inhibitor BTA were linked via a hydrophobic interaction with the phenyl groups from the silica pores formed by the hydrophobic functions of silica co-precursors, i.e., PTES and OTES. In addition, the corrosion inhibitor was trapped inside the surfactant micelles of Igepal and encapsulated together inside the silica pores formed by the surfactant. Moreover, it was observed that only a small amount of BTA can be encapsulated in the absence of the surfactant. Conclusions: An optimized method was developed to obtain mesoporous silica nanoparticles loaded with 1-H Benzotriazole (BTA) as a corrosion inhibitor. The optimal range of the BTA concentration was found to be between 0.18 and 0.35%. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 593 KiB  
Abstract
Preliminary Studies on Silica Nanoparticles Preparation as Transport Vectors for Curcumin
by Cătălin Ionuţ Mihăescu, Ludmila Otilia Cinteză, Cristina Lavinia Nistor, Cristian Petcu, Sabina Georgiana Burlacu, Bogdan Trică, Cristina Scomoroscenco, Raluca Ianchiş, Claudia Ninciuleanu, Cătălina Gîfu and Elvira Alexandrescu
Chem. Proc. 2022, 7(1), 72; https://doi.org/10.3390/chemproc2022007072 - 9 May 2022
Viewed by 1309
Abstract
Mesoporous silica nanoparticles (MSN) are currently central to studies in different scientific areas [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 179 KiB  
Abstract
Organometallic Compounds and Metal Complexes in Cancer Therapy
by Irina-Gabriela Voinea, Denisa Ficai and Anton Ficai
Chem. Proc. 2022, 7(1), 74; https://doi.org/10.3390/chemproc2022007074 - 9 May 2022
Cited by 1 | Viewed by 1990
Abstract
Globally, colon cancer is a major cause of deaths, being the fourth most common type of cancer in the world. The most common therapeutic choice in the early stages of colon cancer is surgical resection, but in some stages of the disease, adjuvant [...] Read more.
Globally, colon cancer is a major cause of deaths, being the fourth most common type of cancer in the world. The most common therapeutic choice in the early stages of colon cancer is surgical resection, but in some stages of the disease, adjuvant chemotherapy is recommended and is essential for the proper treatment of this pathology [1]. Complex combinations based on metals play an important role in the treatment of cancer because of their cytotoxic properties against cancer cells. An organometallic compound that can be used clinically and that plays an important role in the treatment of patients with colon cancer is oxaliplatin. Following studies, chlorine-based derivatives of Au (I)-phosphate showed comparable values to cisplatin on HT-29 (colon cancer) cell lines. Further studies continued to determine absorption at the cellular level, showing that most lipophilic compounds demonstrated a higher colon cancer cell absorption, meaning that they could be correlated with high antiproliferative activity [2]. Copper-based complex combinations were studied, and an inhibitory effect in the nanomolar range on the Colo 205 and Colo 320 colon cancer cell lines was thus observed. Some complexes showed increased toxicity to cancer cells compared to the MRC-5 cell lines. The antiproliferative activity of these complex combinations is significantly low in normal cell lines, thus increasing selectivity towards neoplastic cells was observed. Complex combinations based on Cu (I) show cytotoxic effects against LoVo MDR cell lines that are five times higher compared to oxaliplatin, thus showing the ability to overcome oxaliplatin resistance [3]. Nanostructured drug delivery systems allow the incorporation of metal-based drugs, thus limiting some of their most common shortcomings, such as low selectivity, low solubility and permeability, and high toxicity, which limit he dosage and the emergence of resistance at the cellular level [4]. These drug delivery systems are able to carry the drug and to release it according to its requested dose, even in a targeted manner, thus improving therapeutic activity and limiting systemic toxicity. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
1 pages, 189 KiB  
Abstract
Setup of ASLT Parameters for Evaluation of the Shelf-Life for the New Dry Snack Food Product
by Cătălin Bilbie
Chem. Proc. 2022, 7(1), 75; https://doi.org/10.3390/chemproc2022007075 - 10 May 2022
Viewed by 1778
Abstract
A challenge in the development process for the new products is represented by the stability study and the determination of the shelf-life of the products that will be launched on the market. Often, these important characteristics, for success on the market, are needed [...] Read more.
A challenge in the development process for the new products is represented by the stability study and the determination of the shelf-life of the products that will be launched on the market. Often, these important characteristics, for success on the market, are needed without having the necessary time available for a real-life study. The purpose of this research was to study the physico-chemical and microbiological processes of degradation to set the Accelerated Shelf-Life Testing (ASLT) parameters for a new dry snack food product development. The experimental samples of dry snack food formulations were stored in certain conditions of temperature, humidity and light (accelerated degradation process) for a total period of 30 days. After the final period of storage to evaluate stability over time, the product was subject to a physical-chemical analysis to determine the following parameters: moisture content and activity of water. Microbiological analysis regarding Total Plate Count (TPC) was performed also on the stored samples to highlight the microbiological growth. After performing the analysis, the intervals for the degradation process parameters were established: temperature (35 °C, 45 °C, 55 °C), humidity (65%, 75%, 85%), and light (on/off). These data will be used later for the development of the accelerated aging model to evaluate the shelf life for a new dry snack food product. The water activity (aw) must be below the value of 0.75, the moisture content between 4% and 6% and for microbiological analysis TPC below 104. The greatest influence in the depreciation of the product was the temperature, which led to physico-chemical and microbiological changes. Given the light and the vapor barrier provided by the product packaging, the other depreciation factors (humidity, light) did not have a significant influence on the depreciation of the product. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
1 pages, 165 KiB  
Abstract
The Investigations’ Importance in Conservation and Restoration of the National Cultural Heritage: Mobile Cultural Heritage and Historical Monuments
by Petronela Fotea
Chem. Proc. 2022, 7(1), 76; https://doi.org/10.3390/chemproc2022007076 - 10 May 2022
Viewed by 1526
Abstract
National Cultural Heritage is the memorable synthesis of events and interactions within human society, and, at the same time, the imprint left by human civilization in relation to the irrational and impersonal dimensions of reality. The importance of this imprint is not only [...] Read more.
National Cultural Heritage is the memorable synthesis of events and interactions within human society, and, at the same time, the imprint left by human civilization in relation to the irrational and impersonal dimensions of reality. The importance of this imprint is not only outlined by the role of landmarks or sources of history and civilization, but also by the fact that it has the power to support and strengthen society, crystallizing group, local, national, or global values. By placing themselves at the same cultural landmarks, the members of a society are aware that they are participating in their own history, and protecting the values of their own history as well as the continuity of these values, is, or should be, a priority that is as importance as continuing their own existence. Thus, the appearance of the first specialized institutions for the preservation and capitalization of cultural heritage and the development of auxiliary sciences in museology was a single step. In Romania, the conservation and restoration of cultural assets began 1975 and was initially carried out by a limited number of Zonal Laboratories, with almost every museum institution having a conservation and restoration department today. The evolution of this field in the last 20 years has been colossal, both from the point of view of the equipment and the inventory that enters the laboratories, but also from the point of view of how these specialists are professionally trained. More and more often, the words interdisciplinarity and archaeometry are used in the field of the conservation and restoration of national cultural heritage. What is certain is that hyperspecialized and high-performance devices appear every two minutes, and the field of cultural heritage cannot keep up with funding them. To this end, the interdisciplinarity of the team has led to colossal performances in terms of the conservation, restoration, and capitalization of mobile national cultural heritage and historical monuments. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 503 KiB  
Abstract
Porous Materials as Platforms for the Delivery of Polyphenols
by Denisa Ficai, Ludmila Motelica, Gabriela Petrisor, Irina Fierascu, Radu Claudiu Fierascu, Anton Ficai and Coralia Bleotu
Chem. Proc. 2022, 7(1), 77; https://doi.org/10.3390/chemproc2022007077 - 12 May 2022
Viewed by 1612
Abstract
Drug delivery systems are intensively studied for a wide range of biomedical applications [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 204 KiB  
Abstract
Zinc Oxide Nanoparticles for the Decontamination of Chemical Warfare Nerve Agents and Blister Agents
by Adriana Elena Bratu, Raluca Elena Ginghină, Andreea Elena Modovan, Tudor Viorel Tigănescu, Gabriela Toader, Ramona Elena Oncioiu, Panaghia Deliu and Gabriel Epure
Chem. Proc. 2022, 7(1), 78; https://doi.org/10.3390/chemproc2022007078 - 28 Jun 2022
Viewed by 1847
Abstract
International standards and environmental regulations require the development of new decontamination solutions for hazardous chemicals of military interest (chemical warfare agents) and industrial chemicals (pesticides, insecticides, etc.). It is necessary for them to be more efficient, with a higher decontamination speed and less [...] Read more.
International standards and environmental regulations require the development of new decontamination solutions for hazardous chemicals of military interest (chemical warfare agents) and industrial chemicals (pesticides, insecticides, etc.). It is necessary for them to be more efficient, with a higher decontamination speed and less waste generation. Metal oxide nanoparticles (NPs) have been intensively studied and have shown promising results in various industries (alimentary [1], medicine [2,3], pharmaceutical [4,5] and microbiology [6,7]). Metal oxide NPs offer promising outcomes—such as small particle size, high specific surface area, and unique physicochemical properties—which allow them to both adsorb and degrade toxic compounds due to their catalytic activity [8,9,10]. The paper presents the influence of zinc oxide nanoparticles, embedded in an internally developed amino-alcoholic decontamination solution, on the decontamination efficiency of chemical warfare nerve and blister agents. In this paper, we aimed to evaluate, using gas chromatography–mass spectrometry/electron impact, the decontamination efficiency of ZnO NPs embedded in the organic decontamination solution. The decontamination efficiency was evaluated against two toxic compounds: sulfur mustard (HD) and soman (GD). Several solutions with different concentrations of ZnO NPs (0.1–2%) were tested and compared with the reference decontamination solutions. The decontamination efficiency was evaluated using GC-MS/EI analysis at 2, 10, and 30 min, and 1, 3, 5 and 24 h. The decontamination product formation was observed and quantified throughout the process. The decontamination procedures were caried out at 25 °C with magnetic stirring. The presence of ZnO NPs in the organic decontamination solution showed better decontamination efficiency, which increased along with the concentration of NPs added, at a concentration interval of 0.1–1%. The solution with 2% ZnO NPs showed a decrease in the decontamination efficiency in the cases of both HD and GD. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 214 KiB  
Abstract
Nanocomposites Based Electrosensitive Platforms for Nitrite and Biogenic Amines Determination
by Ana-Maria Gurban, Petru Epure, Iuliana Răut, Mariana Constantin, Nicoleta Radu, Bogdan Trică, Luiza Jecu, Elvira Alexandrescu and Mihaela Doni
Chem. Proc. 2022, 7(1), 79; https://doi.org/10.3390/chemproc2022007079 - 28 Jun 2022
Viewed by 1866
Abstract
Highly electrosensitive platforms have been developed using different nanocomposite materials based on carbon allotropes and different metallic nanoparticles for determination of nitrite and biogenic amines (BAs). The nitrification process occurred in soil represents an important source of pollution. The nitrification consists in biological [...] Read more.
Highly electrosensitive platforms have been developed using different nanocomposite materials based on carbon allotropes and different metallic nanoparticles for determination of nitrite and biogenic amines (BAs). The nitrification process occurred in soil represents an important source of pollution. The nitrification consists in biological oxidation of the relatively immobile ammonium (NH4+) to highly mobile nitrate, via nitrite. This process is carried out mainly by the ammonia–oxidizing bacteria (Nitrosomonas sp. and Nitrobacter sp.) present in the soil microbial population [1,2]. The nitrite contamination of ground and surface waters represents the major concern associated with the nitrification process. Additionally, the growing needs for food and environmental safety has led to an increase in research for the detection of biogenic amines (BAs) in recent years. Despite the fact that BAs are increasingly present in food and beverages, causing toxic effects in the body, legislation that limits their presence in food chains needs to be updated, thus requiring sensitive tools for their detection [3,4]. Miniaturized analytical tools have been developed based on nanocomposite materials obtained through combination of different carbon allotrope materials (nanoribbons, nanotubes—single and multiwalled—and nanofibers) with metallic nanoparticles (Ag, Au-Ag, Pt, Cu). Thus, carbon based screen-printed electrodes (SPE) were chemically modified with the obtained nanocomposite materials and further characterized using different electrochemical techniques. In order to allow a selective and sensitive determination of analytes, an electropolymerized film was deposed on the modified sensors. For BAs determination were realized with two configurations of biosensors, a bienzymatic one consisting in immobilization of diamine oxidase (DAO) and horseradish peroxidase (HRP) onto the modified sensors, and, respectively, a mono-enzymatic system based on immobilization of DAO onto the modified sensors. It was taken into account that the charge of carbon-based nanomaterials on the surface of the sensors should not exceed 5%, in order to ensure a low based current. Morpho-structural and electrochemical characterization studies of the modified SPEs have been performed in order to achieve a high sensitivity and selectivity of detection, applying a low overvoltage. The co-polymeric film ensured a better stability of the nanocomposite material layers at the electrode surface and an optimal matrix for enzymes immobilization. Optimization of the nanocomposite-based sensors were performed, and finally detection of biogenic amines was carried out using biosensors based on single-walled carbon nanotubes and Pt nanoparticles, while nitrite determination was performed using multi-walled carbon nanotubes and AgNP modified sensors at applied potentials between −0.45 and +0.6 V vs. Ag/AgCL. The developed sensors and biosensors showed good sensitivities of nitrite and BAs detection. Although the enzyme DAO has a low enough activity to catalyze the oxidation of amine of interest, the detection limits were lowered due to the electrocatalytic activity of nanocomposite materials and the HRP enzyme used. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 174 KiB  
Abstract
Calcium Carbonate Enriched-Chitosan Prepared from Shrimp Shell Waste
by Andreea Miron, Cesar Filho, Radu Fierascu, Iulia Elena Neblea, Anita-Laura Chiriac, Andrei Sarbu, Horia Iovu and Tanta Verona Iordache
Chem. Proc. 2022, 7(1), 80; https://doi.org/10.3390/chemproc2022007080 - 28 Jun 2022
Viewed by 1642
Abstract
Chitosan is a natural, nontoxic, biocompatible, biodegradable, and water- insoluble polymer, obtained by deacetylation of chitin [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 177 KiB  
Abstract
Hybrid Inkjet-Printable Paste for Screen-Printed Electrodes
by Ana-Lorena Neagu, Ana-Mihaela Gavrila, Petru Epure, Bianca-Elena Stoica, Iulia Elena Neblea, Catalin Zaharia, Horia Iovu and Tanta-Verona Iordache
Chem. Proc. 2022, 7(1), 81; https://doi.org/10.3390/chemproc2022007081 - 28 Jun 2022
Viewed by 1397
Abstract
Nowadays, Gram-negative bacteria (GNB) are among the most significant public health and environment concerns in the world due to their high resistance to antibiotics [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
1 pages, 182 KiB  
Abstract
Nanocomposite Hydrogels Based on Poly(N-vinyl pyrrolidone)
by Alice Ionela Podaru, Gabriela Toader, Stefania Paula Stoleriu, Paul Octavian Stanescu, Raluca Elena Ginghina and Mircea Teodorescu
Chem. Proc. 2022, 7(1), 82; https://doi.org/10.3390/chemproc2022007082 - 28 Jun 2022
Viewed by 1701
Abstract
Poly(N-vinyl pyrrolidone) (PNVP) is one of the most studied and recognized polymer for use in the pharmaceutical industry and medicine purposes due to its unique combination of highly essential properties such as nontoxicity, biocompatibility with human tissue, chemical stability, and good [...] Read more.
Poly(N-vinyl pyrrolidone) (PNVP) is one of the most studied and recognized polymer for use in the pharmaceutical industry and medicine purposes due to its unique combination of highly essential properties such as nontoxicity, biocompatibility with human tissue, chemical stability, and good solubility in water and other solvents. Most of the PNVP-based hydrogels are characterized by low mechanical properties when handled in a swollen state. For this purpose, several methods have been reported to increase the mechanical properties of these gels by introducing an inorganic clay as a reinforcing agent. The present work deals with the preparation and detailed structural characterization of nanocomposite hydrogels based on amidic N-vinyl pyrrolidone (NVP) monomers with or without N,N-methylenbis(acrylamide) (MBA) as chemical crosslinker and different concentrations of Laponite XLG as reinforcing agent. The hydrogels were synthesized by the radical polymerization of the monomers using 2,2-azobisisobutyronitrile (AIBN) as the initiator. In this study, we evaluated the structure of PNVP-based nanocomposites by using FT-IR, their morphology through SEM–EDX, and the influence of different amounts of Laponite XLG on the final properties, by performing rheological measurements and swelling studies. The Laponite XLG, used as reinforcing agent, significantly contributed to the improvement in the mechanical properties of the nanocomposite hydrogels. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 196 KiB  
Abstract
Antioxidant Capacity of Some Extracts from Aronia and Lonicera Fruits
by Valentina Cristina Negru, Eliza Oprea, Claudia Nicola, Maria Marinescu and Claudia-Valentina Popa
Chem. Proc. 2022, 7(1), 83; https://doi.org/10.3390/chemproc2022007083 - 30 Jun 2022
Viewed by 1352
Abstract
Studies in the literature have shown high levels of phenolic compounds in the fruits of Aronia melanocarpa (fam [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
4 pages, 1950 KiB  
Abstract
Key Intermediates for Building the ω-Side Chain of Prostaglandins with a Constrained Pentalenofurane Scaffold Linked to C-15 Carbon Atom to Diminish the PG Inactivation
by Constantin Tanase, Constantin Draghici, Miron Teodor Caproiu, Anamaria Hanganu, Gheorghe Borodi, Maria Maganu, Emese Gal and Lucia Pintilie
Chem. Proc. 2022, 7(1), 84; https://doi.org/10.3390/chemproc2022007084 - 30 Jun 2022
Viewed by 1616
Abstract
The inactivation of prostaglandin (PG) and prostaglandin analogs (PGs) is realized with enzyme oxidation of the 15α-OH to the 15-keto group via the 15-PGDH pathway [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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2 pages, 190 KiB  
Abstract
Synthesis and Characterization of Medium Molecular Weight Chitosan-Stabilized Selenium Nanoparticles
by Valentina Gabriela Bîrsan, Luminița Dimitriu, Raluca Șomoghi, Daniela Berger, Diana Constantinescu Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 85; https://doi.org/10.3390/chemproc2022007085 - 30 Jun 2022
Viewed by 1634
Abstract
Due to its involvement in physiological, metabolic and pharmacological actions, selenium is considered an essential micronutrient in human nutrition [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 192 KiB  
Abstract
Mesoporous CE-SBA15 Catalysts for Algal Biomass Pyrolysis
by Luiza Mirt, Simona Ghimis, Mihaela Ciltea, Grigore Psenovschi and Gabriel Vasilievici
Chem. Proc. 2022, 7(1), 86; https://doi.org/10.3390/chemproc2022007086 - 4 Jul 2022
Viewed by 1357
Abstract
Introduction: Algae have been suggested for use as a biomass-energy resource for fuel production [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 178 KiB  
Abstract
Bio-Char Production from Algal Biomass
by Grigore Pshenovschi, Simona Ghimis, Luiza Mirt and Gabriel Vasilievici
Chem. Proc. 2022, 7(1), 87; https://doi.org/10.3390/chemproc2022007087 - 30 Aug 2022
Viewed by 1273
Abstract
Introduction: Bio-char is a form of charcoal produced from biomass by a process known as pyrolysis [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
1 pages, 206 KiB  
Abstract
Film-Forming Polymeric Blends Designed for the Removal of Heavy Metals and Radionuclides from Contaminated Surfaces
by Alice Podaru, Gabriela Toader, Daniela Pulpea, Traian Rotariu, Aurel Diacon, Edina Rusen, Andreea Moldovan, Raluca Ginghină, Florentina Alexe, Sorina Bajenaru, Ovidiu Iorga, Mihai Ungureanu, Florin Dirloman, Bogdan Pulpea and Lucia Leonat
Chem. Proc. 2022, 7(1), 88; https://doi.org/10.3390/chemproc2022007088 - 8 Sep 2022
Viewed by 1819
Abstract
Surface decontamination is a vast domain. The majority of the methods use a considerable quantity of water, requiring further treatments. This study presents an ecological method for surface decontamination, based on polymeric nanocomposites, specially designed for the removal of heavy metals and radionuclides. [...] Read more.
Surface decontamination is a vast domain. The majority of the methods use a considerable quantity of water, requiring further treatments. This study presents an ecological method for surface decontamination, based on polymeric nanocomposites, specially designed for the removal of heavy metals and radionuclides. Besides being effective in decontaminating the surfaces, these polymeric coatings also reduce the volume of the waste materials. The novelty of this work consists of the innovative path of combining the advantages brought by the film-forming ability of polyvinyl alcohol, with the remarkable metal retention capacity of bentonite nanoclay, together with the chelating ability of alginate, and with one of two ‘new-generation ‘green’ complexing agents’: iminodisuccinic acid (IDS) and 2-phosphonobutane-1,2,4-tricarboxylic acid (PBTC). These are used to obtain powerful, customizable, and environmentally friendly, film-forming, water-based solutions, for the surface decontamination of heavy metals or radioactive metals. Decontamination tests revealed a high decontamination efficiency for heavy metals (DF ≈ 95–98%, tested on glass surface) and also for radioactive metals (DF ≈ 91–97% for 241Am, 90Sr-Y and 137Cs, tested on metal, painted metal, plastic, and glass surfaces).This eco-friendly, low-waste, biodegradable method can successfully be employed, alternatively, to classical methods, having comparable capabilities for surface decontamination, but multiple advantages. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
2 pages, 414 KiB  
Abstract
Enhancement of Lignolytic Enzyme Activity in Ganoderma Lucidum by Co-Cultivation with Bacteria
by Daniel Preda, Daria-Gabriela Popa, Diana Constantinescu-Aruxandei and Florin Oancea
Chem. Proc. 2022, 7(1), 7035; https://doi.org/10.3390/chemproc2022007035 - 9 Mar 2022
Cited by 1 | Viewed by 1448
Abstract
Fungi are known for their capacity to produce two main categories of enzymes, cellulolytic and lignolytic, both valuable for biodegradation of lignocellulosic biomass [...] Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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4 pages, 578 KiB  
Proceeding Paper
The Molecular Species Identified by GS-MS in Sol-Gel Process. Operational Mass Spectrum Libraries
by Virgil Badescu
Chem. Proc. 2022, 7(1), 73; https://doi.org/10.3390/chemproc2022007073 - 9 May 2022
Viewed by 1474
Abstract
The aim of this article is the presentation of new user mass spectral libraries created based on unambiguous assigning of the mass spectra of the tetraethoxysilane (TEOS) oligomers and transesters obtained in the sol-gel process. Gas-chromatography coupled with mass spectrometry (GC-MS) was used [...] Read more.
The aim of this article is the presentation of new user mass spectral libraries created based on unambiguous assigning of the mass spectra of the tetraethoxysilane (TEOS) oligomers and transesters obtained in the sol-gel process. Gas-chromatography coupled with mass spectrometry (GC-MS) was used to unambiguous identification the TEOS oligomers and transesters obtained in the hydrolysis, condensation and transesterification, reactions of tetraethoxysilane in parental solvent (EtOH) and nonparental solvents (MeOH and n-PrOH). The author’s procedure for the interpretation of mass spectra of silicon alkoxides was applied for TEOS, TEOS dimer, methoxy-transesters, and TEOS cyclic tetramer. GC and MS arguments for unambiguous assigning of TEOS oligomers and transesters in the sol-gel process were presented. Full article
(This article belongs to the Proceedings of The 17th International Symposium “Priorities of Chemistry for a Sustainable Development” PRIOCHEM)
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