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36 Results Found

  • Article
  • Open Access
3 Citations
2,865 Views
17 Pages

A selection of dimeric Cu(II) complexes with bidentate N,N′ ligands with the general formula [Cu(L)(X)(μ-OH)]2·nH2O and [Cu(L)(μ-OH)]2X2·nH2O were magneto-structurally analyzed using the Density Functional Theory (DFT). A Br...

  • Article
  • Open Access
22 Citations
3,450 Views
11 Pages

Thermal Decomposition of Ammonium Dinitramide (ADN) as Green Energy Source for Space Propulsion

  • Zakaria Harimech,
  • Kainaubek Toshtay,
  • Meiram Atamanov,
  • Seitkhan Azat and
  • Rachid Amrousse

25 September 2023

The thermal decomposition of an ammonium dinitramide-based energetic compound was conducted for the first time using a dispersive inductively coupled plasma mass spectrometer, DTA-TG analysis, and pyrolysis at a constant temperature. A liquid droplet...

  • Article
  • Open Access
1,067 Views
18 Pages

9 September 2025

To enhance the spectral efficiency of hybrid beamforming in millimeter-wave massive MIMO systems, the problem is formulated as a high-dimensional non-convex optimization under constant modulus constraints. A novel algorithm based on fourth-order tens...

  • Article
  • Open Access
15 Citations
2,944 Views
16 Pages

27 February 2023

A spherical antenna array (SAA) is an array-designed arrangement capable of scanning in almost all the radiation sphere with constant directivity. It finds recent applications in aerospace, spacecraft, vehicular and satellite communications. Therefor...

  • Article
  • Open Access
2 Citations
4,290 Views
22 Pages

18 February 2025

Terrestrial Storage of Biomass (TSB) is a Negative Emission Technology for removing CO2 already in the atmosphere. TSB is compared to other NETs and is shown to be a natural, carbon-efficient, and low-cost option. Nature performs the work of removal...

  • Article
  • Open Access
18 Citations
5,347 Views
12 Pages

18 September 2017

In the present work, entropy generation in the flow and heat transfer of couple stress fluid through an infinite inclined channel embedded in a saturated porous medium is presented. Due to the channel geometry, the asymmetrical slip conditions are im...

  • Article
  • Open Access
10 Citations
2,688 Views
14 Pages

Solution of a Complex Nonlinear Fractional Biochemical Reaction Model

  • Fatima Rabah,
  • Marwan Abukhaled and
  • Suheil A. Khuri

This paper discusses a complex nonlinear fractional model of enzyme inhibitor reaction where reaction memory is taken into account. Analytical expressions of the concentrations of enzyme, substrate, inhibitor, product, and other complex intermediate...

  • Article
  • Open Access
1 Citations
3,139 Views
12 Pages

2 April 2022

This paper analyzes how special relativity changes the equation for the many-body-induced current density starting from the Foldy–Wouthuysen diagonalization of the Dirac–Coulomb Hamiltonian. This current density differs from that obtained...

  • Feature Paper
  • Article
  • Open Access
1 Citations
3,322 Views
29 Pages

30 January 2023

The Schrödinger–Newton model is a nonlinear system obtained by coupling the linear Schrödinger equation of canonical quantum mechanics with the Poisson equation of Newtonian mechanics. In this paper, we investigate the effects of dark...

  • Article
  • Open Access
15 Citations
5,349 Views
24 Pages

A Modified Phase-Field Damage Model for Metal Plasticity at Finite Strains: Numerical Development and Experimental Validation

  • Jelena Živković,
  • Vladimir Dunić,
  • Vladimir Milovanović,
  • Ana Pavlović and
  • Miroslav Živković

28 December 2020

Steel structures are designed to operate in an elastic domain, but sometimes plastic strains induce damage and fracture. Besides experimental investigation, a phase-field damage model (PFDM) emerged as a cutting-edge simulation technique for predicti...

  • Article
  • Open Access
13 Citations
3,278 Views
25 Pages

31 March 2023

Nano-titanium dioxides (nano-TiO2) surface modified with isopropyl tri(dioctylpyrophosphate) titanate (NDZ-201), a titanate coupling agent, and 3-glycidoxypropyltrimethoxysilane (KH-560), a silane coupling agent, were separately mixed with bisphenol...

  • Article
  • Open Access
3 Citations
2,231 Views
21 Pages

Human activity today produces a large number of pollutants that end up in the environment, such as soil, water, and airborne particles. The first objective of this work is to introduce a new third-order multivariate calibration approach called self-w...

  • Article
  • Open Access
13 Citations
4,256 Views
15 Pages

3 October 2019

Hybrid electrochemical capacitors have emerged as attractive energy storage option, which perfectly fill the gap between electric double-layer capacitors (EDLCs) and batteries, combining in one device the high power of the former and the high energy...

  • Feature Paper
  • Review
  • Open Access
46 Citations
9,308 Views
25 Pages

4 July 2020

The constant depletion of fossil fuels along with the increasing need for novel materials, necessitate the development of alternative routes for polymer synthesis. Lignocellulosic biomass, the most abundant carbon source on the planet, can serve as a...

  • Article
  • Open Access
1 Citations
511 Views
14 Pages

Tensor Network Modeling of Electronic Structure of Semiconductor Nanoparticles and Sensory Effect of Layers Based on Them

  • Vladimir S. Posvyanskii,
  • Valeria L. Bodneva,
  • Andrei V. Chertkov,
  • Kairat S. Kurmangaleev,
  • Maria I. Ikim,
  • Vasily B. Novozhilov,
  • Ivan V. Oseledets and
  • Leonid I. Trakhtenberg

15 October 2025

This paper develops mathematical apparatus for the modeling of the electronic structure of semiconductor nanoparticles and the description of sensor response of the layers constructed on their base. The developed technique involves solutions of both...

  • Article
  • Open Access
296 Views
22 Pages

7 February 2026

Designing structure-preserving numerical schemes for the generalized Poisson-Nernst-Planck (PNP) system is challenging due to its inherent strong nonlinearity and coupling. In this paper, we propose a class of efficient, unconditional energy-stable s...

  • Article
  • Open Access
21 Citations
7,318 Views
20 Pages

22 October 2016

The main aim of this study was the application of excitation-emission fluorescence matrices (EEMs) combined with two decomposition methods: parallel factor analysis (PARAFAC) and nonnegative matrix factorization (NMF) to study the interaction mechani...

  • Article
  • Open Access
4 Citations
2,642 Views
16 Pages

Valorization of Cork and High-Density Polyethylene and Polypropylene Wastes in Cork–Plastic Composites: Their Morphology, Mechanical Performance, and Fire Properties

  • Svetlana Petlitckaia,
  • Virginie Tihay-Felicelli,
  • Laurent Ferry,
  • Sylvain Buonomo,
  • Camille Luciani,
  • Yann Quilichini,
  • Paul-Antoine Santoni,
  • Elisabeth Pereira and
  • Toussaint Barboni

The recycling of waste materials is a way of limiting over-consumption and optimizing the value of resources. Within the framework of a circular economy, this can be applied to post-consumer plastic wastes, but also to biobased by-products. Hence, th...

  • Article
  • Open Access
25 Citations
3,643 Views
16 Pages

5 October 2021

In this paper, we analyzed the mass transfer model with chemical reactions during the absorption of carbon dioxide (CO2) into phenyl glycidyl ether (PGE) solution. The mathematical model of the phenomenon is governed by a coupled nonlinear differenti...

  • Article
  • Open Access
15 Citations
3,032 Views
13 Pages

11 March 2021

The photodegradation of the most prescribed glucocorticoids (GCs) was studied under relevant environmental conditions in the presence of suspended TiO2. The considered drugs included cortisone (CORT), hydrocortisone (HCORT), betamethasone (BETA), dex...

  • Article
  • Open Access
43 Citations
7,998 Views
16 Pages

14 November 2017

Two halogen-free inorganic flame retardants, ammonium polyphosphate (APP) and aluminum hydroxide (ATH) were added to wood-flour/polypropylene composites (WPCs) at different APP to ATH mass ratios (APP/ATH ratios), with a constant total loading of 30...

  • Article
  • Open Access
6 Citations
2,325 Views
13 Pages

10 May 2023

5-(1H-Indol-2-yl)-4-phenyl-2,4-dihydro-3H-1,2,4-triazole-3-thione 1a and 4-(4-chlorophenyl)-5-(1H-indol-2-yl)-2,4-dihydro-3H-1,2,4-triazole-3-thione 1b were galactosylated in the presence of NaHCO3 in ethanol to produce S-galactosides 3,4, whereas, i...

  • Article
  • Open Access
60 Citations
6,466 Views
16 Pages

16 May 2018

Using phase change materials (PCMs) in building envelopes became a reliable method to improve indoor comfort and reduce buildings’ energy consumption. This research developed molecular-bridged expanded graphite (EG)/polyethylene glycol (PEG) co...

  • Article
  • Open Access
4 Citations
3,790 Views
14 Pages

11 September 2021

The characterization of competent intermediates of metal complexes, involved in catalytic transformations for the activation of small molecules, is an important target for mechanistic comprehension and catalyst design. Iron complexes deserve particul...

  • Article
  • Open Access
17 Citations
3,534 Views
20 Pages

Efficient Removal of Methylene Blue and Ciprofloxacin from Aqueous Solution Using Flower-like, Nanostructured ZnO Coating under UV Irradiation

  • Vasile Tiron,
  • Mihai Alexandru Ciolan,
  • Georgiana Bulai,
  • Gabriela Mihalache,
  • Florin Daniel Lipsa and
  • Roxana Jijie

26 June 2022

Flower-like ZnO architectures assembled with many nanorods were successfully synthesized through Thermionic Vacuum Arc, operated both in direct current (DC-TVA) and a pulsed mode (PTVA), and coupled with annealing in an oxygen atmosphere. The prepare...

  • Article
  • Open Access
4 Citations
1,742 Views
18 Pages

Visible-Light Photocatalytic Activity of a ZnO-Loaded Isoreticular Metal-Organic Framework

  • Ana Y. Rojas-Forero,
  • Laura Y. Hernández-Benítez,
  • María L. Ospina-Castro,
  • Nataly J. Galán-Freyle,
  • John R. Castro-Suarez,
  • Maximiliano Méndez-López,
  • Samuel P. Hernández-Rivera,
  • José A. Centeno-Ortiz,
  • Sandra P. Romero-Nieto and
  • Leonardo C. Pacheco-Londoño

19 March 2025

A hybrid material composed of IRMOF-3 and ZnO (IRMOF-3/ZnO) was synthesized to enhance photocatalytic methylene blue (MB) degradation under visible-light irradiation. Scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffra...

  • Article
  • Open Access
10 Citations
2,925 Views
15 Pages

30 August 2023

The outbreak of coronavirus disease 2019 (COVID-19) has sparked an urgent demand for advanced diagnosis and vaccination worldwide. The discovery of high-affinity ligands is of great significance for vaccine and diagnostic reagent manufacturing. Targe...

  • Article
  • Open Access
16 Citations
2,637 Views
17 Pages

4 August 2022

Proban® is a multiphase treatment of cotton fabrics based on the formation of pre-condensates using the flame retardant (FR) agent tetrakis (hydroxymethyl) phosphonium salts (THPx). The assessment of the durability of a product demands a prelimin...

  • Feature Paper
  • Article
  • Open Access
12 Citations
4,048 Views
24 Pages

Highly Active Transition Metal-Promoted CuCeMgAlO Mixed Oxide Catalysts Obtained from Multicationic LDH Precursors for the Total Oxidation of Methane

  • Hussein Mahdi S. Al-Aani,
  • Mihaela M. Trandafir,
  • Ioana Fechete,
  • Lucia N. Leonat,
  • Mihaela Badea,
  • Cătălin Negrilă,
  • Ionel Popescu,
  • Mihaela Florea and
  • Ioan-Cezar Marcu

1 June 2020

To improve the catalytic performance of an active layered double hydroxide (LDH)-derived CuCeMgAlO mixed oxide catalyst in the total oxidation of methane, it was promoted with different transition-metal cations. Thus, two series of multicationic mixe...

  • Article
  • Open Access
27 Citations
4,246 Views
13 Pages

Synthesizing CuO/CeO2/ZnO Ternary Nano-Photocatalyst with Highly Effective Utilization of Photo-Excited Carriers under Sunlight

  • Kaiyi Luo,
  • Jing Li,
  • Wenyu Hu,
  • Han Li,
  • Qiuping Zhang,
  • Huan Yuan,
  • Fei Yu,
  • Ming Xu and
  • Shuyan Xu

29 September 2020

The construction of heterostructured photocatalyst with an appropriate energy band structure will help realize highly efficient photo-excited charge separation. In this study, ternary CuO/CeO2/ZnO nano-particle (NP) composites were synthesized by a f...

  • Article
  • Open Access
579 Views
23 Pages

Horizontal Wellbore Stability in the Production of Offshore Natural Gas Hydrates via Depressurization

  • Zhengfeng Shan,
  • Zhiyuan Wang,
  • Shipeng Wei,
  • Peng Liu,
  • En Li,
  • Jianbo Zhang and
  • Baojiang Sun

29 September 2025

Wellbore stability is a crucial factor affecting the safe exploitation of offshore natural gas hydrates. As a sustainable energy source, natural gas hydrate has significant reserves, high energy density, and low environmental impact, making it an imp...

  • Feature Paper
  • Article
  • Open Access
5 Citations
2,263 Views
31 Pages

Transition Metal-Promoted LDH-Derived CoCeMgAlO Mixed Oxides as Active Catalysts for Methane Total Oxidation

  • Marius C. Stoian,
  • Cosmin Romanitan,
  • Katja Neubauer,
  • Hanan Atia,
  • Constantin Cătălin Negrilă,
  • Ionel Popescu and
  • Ioan-Cezar Marcu

17 September 2024

A series of M(x)CoCeMgAlO mixed oxides with different transition metals (M = Cu, Fe, Mn, and Ni) with an M content x = 3 at. %, and another series of Fe(x)CoCeMgAlO mixed oxides with Fe contents x ranging from 1 to 9 at. % with respect to cations, wh...

  • Article
  • Open Access
43 Citations
5,937 Views
26 Pages

The main objective of this study is to evaluate the regenerative effect of functionalized CeO2±δ nanoparticles with a mass fraction of 0.89% of NiO and 1.1% of PdO in adsorption and subsequent decomposition of n-C7 asphaltenes in steam g...

  • Article
  • Open Access
15 Citations
3,698 Views
25 Pages

Hyperthermia of Magnetically Soft-Soft Core-Shell Ferrite Nanoparticles

  • Venkatesha Narayanaswamy,
  • Jayalakshmi Jagal,
  • Hafsa Khurshid,
  • Imaddin A. Al-Omari,
  • Mohamed Haider,
  • Alexander S. Kamzin,
  • Ihab M. Obaidat and
  • Bashar Issa

26 November 2022

Magnetically soft-soft MnFe2O4-Fe3O4 core-shell nanoparticles were synthesized through a seed-mediated method using the organometallic decomposition of metal acetyl acetonates. Two sets of core-shell nanoparticles (S1 and S2) of similar core sizes of...

  • Article
  • Open Access
31 Citations
7,397 Views
20 Pages

25 July 2016

Graphene nanosheets and graphene nanoribbons, G combined with vanadium pentoxide (VO) nanobelts (VNBs) and VNBs forming GVNB composites with varying compositions were synthesized via a one-step low temperature facile hydrothermal decomposition method...