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5,828 Results Found

  • Article
  • Open Access
134 Views
13 Pages

Spatial accessibility to healthcare services is commonly determined by three core components: demand, supply, and traffic speed. Although understanding which factors contribute to accessibility changes can help prioritize interventions to enhance acc...

  • Article
  • Open Access
1,406 Views
24 Pages

15 July 2024

The aims of this paper are to present the methodology, derived mathematical expressions for determining the individual factor influences and the adaptation for the conditions of dynamic deterministic factor analysis and the results of the application...

  • Article
  • Open Access
5 Citations
6,359 Views
19 Pages

9 June 2018

In multiphase (≥3) equilibrium calculations, when the Newton method is used to solve the material balance (Rachford-Rice) equations, poorly conditioned Jacobian can lead to false convergence. We present a robust successive substitution method that so...

  • Feature Paper
  • Article
  • Open Access
4 Citations
3,600 Views
17 Pages

SiC/Si Hybrid Substrate Synthesized by the Method of Coordinated Substitution of Atoms: A New Type of Substrate for LEDs

  • Sergey A. Kukushkin,
  • Lev K. Markov,
  • Alexey S. Pavlyuchenko,
  • Irina P. Smirnova,
  • Andrey V. Osipov,
  • Alexander S. Grashchenko,
  • Andrey E. Nikolaev,
  • Alexey V. Sakharov,
  • Andrey F. Tsatsulnikov and
  • Genadii V. Sviatets

24 June 2023

This paper proposes a new type of substrate for manufacturing LEDs based on AlInGaN heterostructures. Instead of depositing SiC layers on the surface of Si using the conventional method, a new method involving the coordinated substitution of atoms (M...

  • Article
  • Open Access
55 Citations
4,229 Views
13 Pages

5 April 2020

Symmetry plays an important role in nonlinear system theory. In particular, it offers several methods by which to understand and model the chaotic behavior of mathematical, physical and biological systems. This study examines chaotic behavior in the...

  • Article
  • Open Access
2 Citations
1,838 Views
14 Pages

In order to explore the interface adsorption mechanism of hydroxyl-substituted alkylbenzene sulfonates, the interfacial tension relaxation method was used to investigate the dilational rheology properties of sodium 2-hydroxy-3-octyl-5-octylbenzene su...

  • Article
  • Open Access
3 Citations
2,060 Views
12 Pages

Supervised Character Resemble Substitution Personality Adversarial Method

  • Xiujuan Wang,
  • Siwei Cao,
  • Kangfeng Zheng,
  • Xu Guo and
  • Yutong Shi

With the development of science and computer technology, social networks are changing our daily lives. However, this leads to new, often hidden dangers in areas such as cybersecurity. Of these, the most complex and harmful is the Advanced Persistent...

  • Article
  • Open Access
3 Citations
1,703 Views
17 Pages

Chromium Substitution Extraction Method for Its Recovery from Chromium-Tanned Leather Waste

  • Lesław Świerczek,
  • Paulina Hercel,
  • Izabela Konkol,
  • Ksawery Kuligowski and
  • Adam Cenian

30 December 2024

The leather industry generates significant amounts of waste, including chromium-tanned leather waste (CTLW), which poses environmental and health hazards due to chromium’s potential toxicity. Efficient management of CTLW is crucial for environm...

  • Article
  • Open Access
10 Citations
4,483 Views
18 Pages

Skin Substitute Preparation Method Induces Immunomodulatory Changes in Co-Incubated Cells through Collagen Modification

  • Jordan Holl,
  • Cezary Pawlukianiec,
  • Javier Corton Ruiz,
  • Dawid Groth,
  • Kamil Grubczak,
  • Hady Razak Hady,
  • Jacek Dadan,
  • Joanna Reszec,
  • Slawomir Czaban and
  • Andrzej Eljaszewicz
  • + 2 authors

Chronic ulcerative and hard-healing wounds are a growing global concern. Skin substitutes, including acellular dermal matrices (ADMs), have shown beneficial effects in healing processes. Presently, the vast majority of currently available ADMs are pr...

  • Article
  • Open Access
5 Citations
1,603 Views
6 Pages

Range anxiety has been widely recognized as a critical barrier for battery electric vehicles (BEV), but its measurement method is lacking. Such a knowledge gap makes it difficult to analyse the competiveness of and the demand for BEVs. This study dev...

  • Article
  • Open Access
5 Citations
2,797 Views
13 Pages

Assessment of Beef Manure Economic Value by the Method of Equivalent Green and Mineral Fertilizer Substitution

  • Veljko Šarac,
  • Dragan Milić,
  • Nataša Vukelić,
  • Tihomir Novaković,
  • Dragana Novaković,
  • Mirjana Ljubojević and
  • Vesna Rodić

The imperative of sustainable agricultural development, coupled with growing challenges related to climate change reaffirms the importance of manure and increases the demand for it. Due to the underdeveloped market for manure, there is a problem in a...

  • Article
  • Open Access
1 Citations
2,143 Views
16 Pages

YAG:Ce Nanophosphors Synthesized by the Polymer–Salt Method for White LEDs with Isomorphic Substitution of Yttrium by Gadolinium

  • Dmitry V. Bulyga,
  • Diana A. Gavrilova,
  • Sergey K. Evstropiev,
  • Irina A. Arefina,
  • Maxim K. Myagkih and
  • Andrey A. Shelemanov

26 July 2023

Fine-dispersed YGdAG:Ce nanopowders with various degrees of isomorphic substitution of yttrium by gadolinium were synthesized. The structure and luminescent properties were studied by X-ray diffraction, attenuated total reflection Fourier-transform i...

  • Article
  • Open Access
14 Citations
3,072 Views
16 Pages

26 April 2021

Meat substitution by legume proteins in various types of meat products is a common practice. A reliable detection and quantification of these additives is required to control food specifications, especially regarding food fraud. Consequently, a UHPLC...

  • Article
  • Open Access
4 Citations
2,470 Views
14 Pages

26 November 2021

In order to establish the effective application of materials in a particular area, it is important to first investigate the physical and chemical properties, such as the crystallinity, structure, and the optical and surface properties. The objective...

  • Communication
  • Open Access
1 Citations
3,536 Views
9 Pages

31 January 2023

C-C chemokine receptor 9 (CCR9) is a receptor for C-C-chemokine ligand 25 (CCL25). CCR9 is crucial in the chemotaxis of immune cells and inflammatory responses. Moreover, CCR9 is highly expressed in tumors, including several solid tumors and T-cell a...

  • Article
  • Open Access
2 Citations
1,222 Views
15 Pages

Groundwater Pollution Source and Aquifer Parameter Estimation Based on a Stacked Autoencoder Substitute

  • Han Wang,
  • Jinping Zhang,
  • Hang Li,
  • Guanghua Li,
  • Jiayuan Guo and
  • Wenxi Lu

10 September 2024

A concurrent heuristic search iterative process (CHSIP) is used for estimating groundwater pollution sources and aquifer parameters in this work. Frequent calls to carry out a numerical simulation of groundwater pollution have generated a huge calcul...

  • Article
  • Open Access
4 Citations
1,978 Views
15 Pages

18 February 2023

Electrical energy substitution is an important way to achieve the optimization of the energy consumption structure as well as to alleviate environmental problems, and it is also an important source of benefits of the integrated energy system. However...

  • Article
  • Open Access
10 Citations
3,174 Views
10 Pages

Influence of Broiler Age on the Apparent Metabolizable Energy of Cereal Grains Determined Using the Substitution Method

  • Mahmoud M. Khalil,
  • Mohammad Reza Abdollahi,
  • Faegheh Zaefarian,
  • Peter V. Chrystal and
  • Velmurugu Ravindran

13 January 2022

The present study investigated the influence of broiler age on the AMEn of wheat, sorghum, barley, and corn using the substitution method at six different ages (days 7, 14, 21, 28, 35, and 42). A corn-soybean meal basal diet was formulated and, the t...

  • Article
  • Open Access
59 Citations
2,122 Views
22 Pages

9 October 2023

The global macroeconomic shocks of the last decade entail the restructuring of national production networks and induce processes of input substitution. We suggest mathematical tools of Young duality for variational inequalities for studying these pro...

  • Article
  • Open Access
1 Citations
3,232 Views
14 Pages

Varying Synthesis Conditions and Comprehensive Characterization of Fluorine-Doped Hydroxyapatite Nanocrystals in a Simulated Body Fluid

  • Dinbandhu Thakur,
  • Sheng-Chi Yeh,
  • Ren-Hao Cheng,
  • Song-Seng Loke,
  • Hung-Hsiang Wei,
  • Po-Yu Cheng,
  • Yi-Chun Lai,
  • Hsuan-Ying Chen,
  • Yu-Ren Huang and
  • Shang-Wu Ding

19 January 2022

Bone supports animal bodies, is the place where blood is produced, and is essential for the immune system, among other important functions. The dominant inorganic component in bone is hydroxyapatite (Hap), the structure and dynamics of which still po...

  • Article
  • Open Access
2,601 Views
18 Pages

1 December 2023

The iron-promoted 1,5-substitution reaction of endocyclic oxiranes with MeMgBr yields exocyclic 2,4,5-trienols with high diastereomeric ratios of up to 100:0. However, for the method’s success, the oxirane ring must have a trans-configuration....

  • Article
  • Open Access
29 Citations
13,444 Views
16 Pages

Implementation of the Code of Marketing of Breast-Milk Substitutes in Vietnam: Marketing Practices by the Industry and Perceptions of Caregivers and Health Workers

  • Tuan T. Nguyen,
  • Ha T. T. Tran,
  • Jennifer Cashin,
  • Van D. C. Nguyen,
  • Amy Weissman,
  • Trang T. Nguyen,
  • Bridget Kelly and
  • Roger Mathisen

22 August 2021

Background: The promotion of breastmilk substitutes (BMS) is an important barrier to successful breastfeeding. Objective: To examine the enactment and implementation of the Code of Marketing of Breast-Milk Substitutes (the Code) in Vietnam with a foc...

  • Article
  • Open Access
1,152 Views
20 Pages

12 January 2025

During switching in electrical systems, transient electromagnetic processes occur. The resulting dangerous current surges are best studied by computer simulation. However, the time required for computer simulation of such processes is significant for...

  • Review
  • Open Access
7 Citations
2,625 Views
19 Pages

Depollution of Polymeric Leather Waste by Applying the Most Current Methods of Chromium Extraction

  • Ana-Maria Nicoleta Codreanu (Manea),
  • Daniela Simina Stefan,
  • Lidia Kim and
  • Mircea Stefan

30 May 2024

The leather industry is one of the most polluting industries in the world due to the large amounts of waste following raw hide processing but also due to the high content of chemical substances present in leather waste. The main problem with chromium...

  • Article
  • Open Access
5 Citations
2,527 Views
20 Pages

Structural, Morphological, and Optical Properties of Single and Mixed Ni-Co Aluminates Nanoparticles

  • Dana Gingasu,
  • Ovidiu Oprea,
  • Gabriela Marinescu,
  • Jose Maria Calderon Moreno,
  • Daniela C. Culita,
  • Silviu Preda and
  • Vasile-Adrian Surdu

16 September 2023

A series including single and mixed Ni-Co aluminates was obtained using the precursor method, with malic acid as a ligand. The malate precursors (polynuclear coordination compounds) were isolated and characterized by Fourier Transform Infrared (FTIR)...

  • Article
  • Open Access
1 Citations
1,293 Views
13 Pages

4 May 2025

Coarse-grained soil (CGS) is a vital geotechnical material extensively used in engineering projects. Scale effects pose challenges to accurately assessing its shear strength, and the influences of scaling methods and moisture content remain underexpl...

  • Article
  • Open Access
2,122 Views
24 Pages

10 November 2022

As our dependency on the digital world increases, our private information becomes widely visible and an easy target. The digital world is never safe and is full of adversaries who are eager to invade our privacy and learn our secrets. Leveraging the...

  • Article
  • Open Access
6 Citations
8,935 Views
15 Pages

12 May 2011

The study aims to present a detailed theoretical investigation of noncovalent intermolecular interactions between different π–π stacking nitrogen substituted phenothiazine derivatives by applying second-order Møller-Plesset perturbation (MP2), densit...

  • Article
  • Open Access
1 Citations
4,670 Views
23 Pages

Benzo[1,2-d:4,5-d′]bis([1,2,3]thiadiazole) and Its Bromo Derivatives: Molecular Structure and Reactivity

  • Timofey N. Chmovzh,
  • Daria A. Alekhina,
  • Timofey A. Kudryashev,
  • Rinat R. Aysin,
  • Alexander A. Korlyukov and
  • Oleg A. Rakitin

Benzo[1,2-d:4,5-d′]bis([1,2,3]thiadiazole) (isoBBT) is a new electron-withdrawing building block that can be used to obtain potentially interesting compounds for the synthesis of OLEDs and organic solar cells components. The electronic structur...

  • Article
  • Open Access
1 Citations
1,890 Views
18 Pages

8 March 2024

Supersaturated designs (SSDs) refer to those designs in which the run size is much smaller than the main effects to be estimated. They are commonly used to identify a few, but critical, active factors from a large set of potentially active ones, keep...

  • Article
  • Open Access
8 Citations
4,047 Views
17 Pages

22 September 2021

To mitigate the global greenhouse effect and the waste of carbon dioxide, a chemical raw material, high-purity γ-phase mesoporous alumina (MA) with excellent CO2 adsorption performance was synthesized by the direct aging method and ammonium salt subs...

  • Article
  • Open Access
6 Citations
2,633 Views
29 Pages

5 May 2021

This article is an insight into interdisciplinary topics in the field of civil engineering, morphology, architecture, mechanics, and computer programming. A novel method for shaping unconventional complex roofs in which regular folded units transform...

  • Article
  • Open Access
13 Citations
3,831 Views
24 Pages

Synthesis and Characterization of High-Purity Mesoporous Alumina with Excellent Adsorption Capacity for Congo Red

  • Zhonglin Li,
  • Ding Wang,
  • Fengcheng Lv,
  • Junxue Chen,
  • Chengzhi Wu,
  • Yuping Li,
  • Jialong Shen and
  • Yibing Li

27 January 2022

We explore a more concise process for the preparation of high-purity alumina and to address the problem of some conventional micro- and nano-adsorbents having difficulty in exposing their adsorption sites to target pollutants in solution due to the h...

  • Article
  • Open Access
2 Citations
2,255 Views
20 Pages

New Derivatives of N-Hydroxybutanamide: Preparation, MMP Inhibition, Cytotoxicity, and Antitumor Activity

  • Anastasia Balakina,
  • Svyatoslav Gadomsky,
  • Tatyana Kokovina,
  • Tatyana Sashenkova,
  • Denis Mishchenko and
  • Alexei Terentiev

15 November 2023

Using a novel method of N-substituted succinimide ring opening, new N-hydroxybutanamide derivatives were synthesized. These compounds were evaluated for their ability to inhibit matrix metalloproteinases (MMPs) and their cytotoxicity. The iodoaniline...

  • Article
  • Open Access
3 Citations
1,504 Views
22 Pages

Elastoplastic Solution for Tunnel Composite Support Structures Based on Mohr–Coulomb Criterion

  • Wentong Li,
  • Peng He,
  • Gang Wang,
  • Wen Zheng,
  • Kerui Fan,
  • Lantian Wang and
  • Chengcheng Zheng

17 November 2024

Linings and anchor bolts, as common support structures, play a crucial role in ensuring the stability of tunnel surrounding rock. This study aims to investigate the elastic–plastic behavior of lining-anchor bolt support structures in deep circu...

  • Article
  • Open Access
12 Citations
2,624 Views
15 Pages

24 December 2020

In this paper, a series of structurally modified silicate-substituted apatite co-doped with Sr2+ and Eu3+ ions were synthesized by a microwave-assisted hydrothermal method. The concentration of Sr2+ ions was set at 2 mol% and Eu3+ ions were establish...

  • Article
  • Open Access
3 Citations
2,734 Views
13 Pages

28 December 2022

Many variants of uncertain significance (VUS) have been detected in clinical cancer cases using next-generation sequencing-based cancer gene panel analysis. One strategy for the elucidation of VUS is the functional analysis of cultured cancer cell li...

  • Article
  • Open Access
189 Views
25 Pages

7 January 2026

This study evaluates the early impact of Central Bank Digital Currencies (CBDCs) on key financial indicators in The Bahamas, focusing on the introduction of the SandDollar—the world’s first fully implemented retail CBDC. Using the Synthet...

  • Article
  • Open Access
15 Citations
8,345 Views
15 Pages

A Greener and Efficient Method for Nucleophilic Aromatic Substitution of Nitrogen-Containing Fused Heterocycles

  • Joana F. Campos,
  • Mohammed Loubidi,
  • Marie-Christine Scherrmann and
  • Sabine Berteina-Raboin

A simple and efficient methodology for the nucleophilic aromatic substitution of nitrogen-containing fused heterocycles with interesting biological activities has been developed in an environmentally sound manner using polyethylene glycol (PEG-400) a...

  • Article
  • Open Access
6,947 Views
17 Pages

10 February 2023

The rapid loss of Arctic Sea ice cover and thickness diminishes the surface albedo, which increases the ocean’s absorption of solar heat and exacerbates the Arctic amplification effect. According to the most recent research from the Intergovern...

  • Article
  • Open Access
9 Citations
2,770 Views
15 Pages

Effects of Rhenium Substitution of Co and Fe in Spinel CoFe2O4 Ferrite Nanomaterials

  • Yuruo Zheng,
  • Ghulam Hussain,
  • Shuyi Li,
  • Shanta Batool and
  • Xiawa Wang

18 August 2022

In this work, nanoparticles of Co1−xRexFe2O4 and CoFe2−xRexO4 (0 ≤ x ≤ 0.05) were synthesized by the sol-gel method. The Rietveld refinement analysis of XRD and Raman data revealed that all of the prepared samples were single phase...

  • Article
  • Open Access
10 Citations
3,124 Views
13 Pages

26 September 2021

In the present work, a new method for obtaining silicon carbide of the cubic polytype 3C-SiC with silicon vacancies in a stable state is proposed theoretically and implemented experimentally. The idea of the method is that the silicon vacancies are f...

  • Article
  • Open Access
5 Citations
2,846 Views
16 Pages

4 August 2022

Highly accurate measurements of infrared systems cannot be achieved without precise radiometric calibrations. In order to correctly interpret and process infrared images and monitor the performance of infrared cameras, their radiometric calibration i...

  • Article
  • Open Access
5 Citations
4,462 Views
8 Pages

A Concise Synthetic Method for Constructing 3-Substituted Piperazine-2-Acetic Acid Esters from 1,2-Diamines

  • Srinivas Chamakuri,
  • Sunny Ann Tang,
  • Kevin A. Tran,
  • Shiva Krishna Reddy Guduru,
  • Peter K. Bolin,
  • Kevin R. MacKenzie and
  • Damian W. Young

We report a short synthetic route for synthesizing 2,3-substituted piperazine acetic acid esters. Optically pure amino acids were efficiently converted into 1,2-diamines that could be utilized to deliver the title 2,3-substituted piperazines in five...

  • Article
  • Open Access
494 Views
14 Pages

Automatic Substitution of Prioritization Methods Preserving Information Integrity

  • Joao Batista Mendes,
  • Renato Dourado Maia,
  • Marcos Flávio Silveira Vasconcelos D’Angelo,
  • Iara Sibele Silva,
  • Petr Y. Ekel and
  • Matheus Pereira Libório

13 November 2025

Companies face multi-criteria problems every day, such as prioritizing projects, investments, and suppliers. In this respect, the literature offers countless methods, some of which provide partial and flawed solutions. Therefore, identifying and repl...

  • Article
  • Open Access
8 Citations
2,062 Views
11 Pages

25 May 2022

Recently, “power cuts” and “coal price surges” have been significant concerns of individuals and societies. The main reasons for a power cut are a recent rapid increase in power consumption, shortage of thermal coal or the lar...

  • Article
  • Open Access
5 Citations
2,706 Views
19 Pages

12 March 2021

In search for the cause leading to low reaction yields, each step along the reaction energy profile computed for the assumed oxidative nucleophilic substitution of hydrogen (ONSH) reaction between 2-phenylquinoxaline and lithium phenylacetylide was m...

  • Article
  • Open Access
4 Citations
4,805 Views
12 Pages

A Simple, Efficient, and Eco-Friendly Method for the Preparation of 3-Substituted-2,3-dihydroquinazolin-4(1H)-one Derivatives

  • Zainab Almarhoon,
  • Kholood A. Dahlous,
  • Rakia Abd Alhameed,
  • Hazem A. Ghabbour and
  • Ayman El-Faham

9 November 2019

A simple, cost-effective method under environmentally benign conditions is a very important concept for the preparation of 2,3-dihydroquinazolin-4(1H)-one derivatives. The present work describes an efficient and eco-friendly protocol for the synthesi...

  • Review
  • Open Access
25 Citations
6,521 Views
24 Pages

Osteogenic Peptides and Attachment Methods Determine Tissue Regeneration in Modified Bone Graft Substitutes

  • George Bullock,
  • Joss Atkinson,
  • Piergiorgio Gentile,
  • Paul Hatton and
  • Cheryl Miller

The inclusion of biofunctional molecules with synthetic bone graft substitutes has the potential to enhance tissue regeneration during treatment of traumatic bone injuries. The clinical use of growth factors has though been associated with complicati...

  • Article
  • Open Access
8 Citations
2,475 Views
15 Pages

Thermal Stability of Iron- and Silicon-Substituted Hydroxyapatite Prepared by Mechanochemical Method

  • Svetlana V. Makarova,
  • Natalia V. Bulina,
  • Olga B. Vinokurova and
  • Arcady V. Ishchenko

11 May 2023

In this study, hydroxyapatite with the substitution of calcium cations by iron and phosphate by silicate groups was synthesized via a mechanochemical method. The as-prepared compounds have the general formula Ca10−xFex(PO4)6−x(SiO4)x(OH)2...

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