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Total 2868 results found since Jan 2013.

Molecules, Vol. 28, Pages 3430: Effect of Carbonization Temperature on Microstructures and Properties of Electrospun Tantalum Carbide/Carbon Fibers
igai Duan Compared with traditional metal materials, carbon-based materials have the advantages of low density, high conductivity, good chemical stability, etc., and can be used as reliable alternative materials in various fields. Among them, the carbon fiber conductive network constructed by electrospinning technology has the advantages of high porosity, high specific surface area and rich heterogeneous interface. In order to further improve the conductivity and mechanical properties of pure carbon fiber films, tantalum carbide (TaC) nanoparticles were selected as conductive fillers. The crystallization degree, electr...
Source: Molecules - April 13, 2023 Category: Chemistry Authors: Hongtao Guo Xiaofan Ma Qiqi Lv Chunmei Zhang Gaigai Duan Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3409: Intelligent Workflow and Software for Non-Target Analysis of Complex Samples Using a Mixture of Toxic Transformation Products of Unsymmetrical Dimethylhydrazine as an Example
K. Buryak Unsymmetrical dimethylhydrazine (UDMH) is a widely used rocket propellant. Entering the environment or being stored in uncontrolled conditions, UDMH easily forms an enormous variety (at least many dozens) of transformation products. Environmental pollution by UDMH and its transformation products is a major problem in many countries and across the Arctic region. Unfortunately, previous works often use only electron ionization mass spectrometry with a library search, or they consider only the molecular formula to propose the structures of new products. This is quite an unreliable approach. It was demonstrated t...
Source: Molecules - April 12, 2023 Category: Chemistry Authors: Anastasia Yu. Sholokhova Dmitriy D. Matyushin Oksana I. Grinevich Svetlana A. Borovikova Aleksey K. Buryak Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3403: Biofabrication of Fe3O4 Nanoparticles from Spirogyra hyalina and Ajuga bracteosa and Their Antibacterial Applications
In this study, the fabrication of iron oxide NPs from Spirogyra hyalina and Ajuga bracteosa was conducted via an easy, environmentally friendly, and cost-effective process. The fabricated Fe3O4 NPs were characterized using various analytical methods to study their unique properties. UV-Vis absorption peaks were observed in algal and plant-based Fe3O4 NPs at 289 nm and 306 nm, respectively. Fourier transform infrared (FTIR) spectroscopy analyzed diverse bioactive phytochemicals present in algal and plant extracts that functioned as stabilizing and capping agents in the fabrication of algal and plant-based Fe3O4 NPs. X-ray d...
Source: Molecules - April 12, 2023 Category: Chemistry Authors: Muhammad Shakeeb Sharif Hajra Hameed Abdul Waheed Muhammad Tariq Afshan Afreen Asif Kamal Eman A. Mahmoud Hosam O. Elansary Saddam Saqib Wajid Zaman Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3396: A Self-Cleaning TiO2 Bacterial Cellulose Super-Hydrophilic Underwater Super-Oleophobic Composite Membrane for Efficient Oil & ndash;Water Separation
Molecules, Vol. 28, Pages 3396: A Self-Cleaning TiO2 Bacterial Cellulose Super-Hydrophilic Underwater Super-Oleophobic Composite Membrane for Efficient Oil–Water Separation Molecules doi: 10.3390/molecules28083396 Authors: Yawen Cui Xudong Zheng Tongtong Xu Biao Ji Jinfeng Mei Zhongyu Li Due to the increasingly serious problem of offshore oil spills, research related to oil–water separation has attracted more and more attention. Here, we prepared a super-hydrophilic/underwater super-oleophobic membrane (hereinafter referred to as BTA) using poly-dopamine (PDA) to adhesive TiO2 nano...
Source: Molecules - April 12, 2023 Category: Chemistry Authors: Yawen Cui Xudong Zheng Tongtong Xu Biao Ji Jinfeng Mei Zhongyu Li Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3392: A Highly Efficient Workflow for Detecting and Identifying Sequence Variants in Therapeutic Proteins with a High Resolution LC-MS/MS Method
Feng Yang Large molecule protein therapeutics have steadily grown and now represent a significant portion of the overall pharmaceutical market. These complex therapies are commonly manufactured using cell culture technology. Sequence variants (SVs) are undesired minor variants that may arise from the cell culture biomanufacturing process that can potentially affect the safety and efficacy of a protein therapeutic. SVs have unintended amino acid substitutions and can come from genetic mutations or translation errors. These SVs can either be detected using genetic screening methods or by mass spectrometry (MS). Recent ad...
Source: Molecules - April 12, 2023 Category: Chemistry Authors: Lance Cadang Chi Yan Janet Tam Benjamin Nathan Moore Juergen Fichtl Feng Yang Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3360: Fast Detection of Heavy Metal Content in Fritillaria thunbergii by Laser-Induced Breakdown Spectroscopy with PSO-BP and SSA-BP Analysis
In this study, laser-induced breakdown spectroscopy (LIBS) was applied to detect the heavy metal content (Cd, Cu, and Pb) in Fritillaria thunbergii. Quantitative prediction models were established using a back-propagation neural network (BPNN) optimized using the particle swarm optimization (PSO) algorithm and sparrow search algorithm (SSA), called PSO-BP and SSA-BP, respectively. The results revealed that the BPNN models optimized by PSO and SSA had better accuracy than the BPNN model without optimization. The performance evaluation metrics of the PSO-BP and SSA-BP models were similar. However, the SSA-BP model had two ad...
Source: Molecules - April 11, 2023 Category: Chemistry Authors: Xinmeng Luo Rongqin Chen Muhammad Hilal Kabir Fei Liu Zhengyu Tao Lijuan Liu Wenwen Kong Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3344: Electrodeposition of High-Quality Ni/SiC Composite Coatings by Using Binary Non-Ionic Surfactants
Haining Chen In order to increase the hardness, wear resistance and corrosion resistance of nickel-based coatings, pure nickel is often co-electrodeposited with silicon carbide (SiC) particles. However, SiC particles tend to agglomerate and precipitate in the bath, which reduces the amounts of nanoparticles and causes nonuniformity. Herein, we solve these problems by using binary non-ionic surfactants (Span 80 and Tween 60) to effectively disperse SiC particles (binary-SiC) in the bath, which suppresses nanoparticles agglomeration and leads to uniformly distributed SiC particles in the composite coatings. In compariso...
Source: Molecules - April 10, 2023 Category: Chemistry Authors: Han Rao Weiping Li Fuzhen Zhao Yongfa Song Huicong Liu Liqun Zhu Haining Chen Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3336: Highly Efficient Selective Hydrogenation of Cinnamaldehyde to Cinnamyl Alcohol over CoRe/TiO2 Catalyst
Zuojun Wei Allylic alcohols typically produced through selective hydrogenation of α,β-unsaturated aldehydes are important intermediates in fine chemical industry, but it is still a challenge to achieve its high selectivity transformation. Herein, we report a series of TiO2-supported CoRe bimetallic catalysts for the selective hydrogenation of cinnamaldehyde (CAL) to cinnamyl alcohol (COL) using formic acid (FA) as a hydrogen donor. The resultant catalyst with the optimized Co/Re ratio of 1:1 can achieve an exceptional COL selectivity of 89% with a CAL conversion of 99% under mild conditions ...
Source: Molecules - April 10, 2023 Category: Chemistry Authors: Mengting Chen Yun Wang Limin Jiang Yuran Cheng Yingxin Liu Zuojun Wei Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3320: One Pot Synthesis, Biological Efficacy of AuNPs and Au-Amoxicillin Conjugates Functionalized with Crude Flavonoids Extract of Micromeria biflora
Hussain Essam A. Ali Amoxicillin is the most widely used antibiotic in human medicine for treating bacterial infections. However, in the present research, Micromeria biflora’s flavonoids extract mediated gold nanoparticles (AuNPs) were conjugated with amoxicillin (Au-amoxi) to study their efficacy against the inflammation and pain caused by bacterial infections. The formation of AuNPs and Au-amoxi conjugates were confirmed by UV–visible surface plasmon peaks at 535 nm and 545 nm, respectively. The scanning electron microscopy (SEM), zeta potential (ZP), and X-ray diffraction (XRD) studies...
Source: Molecules - April 9, 2023 Category: Chemistry Authors: Kamran Jalil Shabir Ahmad Nazrul Islam Rahim Ullah Qudsia Jalil Sulaiman Sulaiman Anoosha Sajjad Riaz Ullah Ali S. Alqahtani Ahmed Bari Hidayat Hussain Essam A. Ali Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3318: A Straightforward Method for the Development of Positively Charged Gold Nanoparticle-Based Vectors for Effective siRNA Delivery
tr I. Nikitin The therapeutic potential of short interfering RNA (siRNA) to treat many diseases that are incurable with traditional preparations is limited by the extensive metabolism of serum nucleases, low permeability through biological membrane barriers because of a negative charge, and endosomal trapping. Effective delivery vectors are required to overcome these challenges without causing unwanted side effects. Here, we present a relatively simple synthetic protocol to obtain positively charged gold nanoparticles (AuNPs) with narrow size distribution and the surface modified with Tat-related cell-penetrating pepti...
Source: Molecules - April 8, 2023 Category: Chemistry Authors: Tatiana N. Elizarova Maxim L. Antopolsky Denis O. Novichikhin Artemiy M. Skirda Alexey V. Orlov Vera A. Bragina Petr I. Nikitin Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3286: Study of the Sensing Kinetics of G Protein-Coupled Estrogen Receptor Sensors for Common Estrogens and Estrogen Analogs
This study also provides a novel platform for the accurate functional evaluation of food-functional components and toxins.
Source: Molecules - April 7, 2023 Category: Chemistry Authors: Dingqiang Lu Xinqian Wang Chunlei Feng Danyang Liu Yixuan Liu Yujiao Liu Jie Li Jiayao Zhang Na Li Yujing Deng Ke Wang Ruijuan Ren Guangchang Pang Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3299: Biosynthesis and Mathematical Interpretation of Zero-Valent Iron NPs Using Nigella sativa Seed Tincture for Indemnification of Carcinogenic Metals Present in Industrial Effluents
In this study, heavy metal remediation capabilities are determined by the green synthesis of ZVI-NPs using aqueous seed extract of Nigella sativa which is a convenient, environmentally friendly, efficient, and cost-effective technique. The seed extract of Nigella sativa was utilized as a capping and reducing agent for the generation of ZVI-NPs. UV-visible spectrophotometry (UV-vis), scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy (SEM-EDX), and Fourier transform infrared spectroscopy (FTIR) was used to investigate the ZVI-NP composition, shape, elemental constitution, and perspective function...
Source: Molecules - April 7, 2023 Category: Chemistry Authors: Muhammad Naveed Syeda Izma Makhdoom Shafiq ur Rehman Tariq Aziz Farzana Bashir Urooj Ali Metab Alharbi Abdulrahman Alshammari Abdullah F. Alasmari Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3262: TiO2-MXene/PEDOT:PSS Composite as a Novel Electrochemical Sensing Platform for Sensitive Detection of Baicalein
n Duan Limin Lu In this work, TiO2-MXene/poly (3,4-ethylenedioxythiophene): poly(styrenesulfonate) (PEDOT:PSS) composite was utilized as an electrode material for the sensitive electrochemical detection of baicalein. The in-situ growth of TiO2 nanoparticles on the surface of MXene nanosheets can effectively prevent their aggregation, thus presenting a significantly large specific surface area and abundant active sites. However, the partial oxidation of MXene after calcination could reduce its conductivity. To address this issue, herein, PEDOT:PSS films were introduced to disperse the TiO2-MXene materials. The uniform...
Source: Molecules - April 6, 2023 Category: Chemistry Authors: Shuya Xue Min Shi Jinye Wang Jiapeng Li Guanwei Peng Jingkun Xu Yansha Gao Xuemin Duan Limin Lu Tags: Article Source Type: research

Molecules, Vol. 28, Pages 3278: A Comprehensive Review on Pharmacologically Active Phyto-Constituents from Hedychium species
In this study, we present a reinvestigation of the chemical constituents present in Hedychium species obtained from the essential oil and solvent extraction of the flowers, leaves and rhizomes under consideration. Key databases such as PubMed, Science Direct, Scopus, and Google Scholar amongst others were probed for a systematic search using keywords to retrieve relevant publications on this plant. An exhaustive electronic survey of the related literature on Hedychium species resulted in around 200 articles. Articles published between the years 1975–2021 were included. The studies conducted on either crude ex...
Source: Molecules - April 6, 2023 Category: Chemistry Authors: Alok Pratap Singh Havagiray Chitme Rajeev Kumar Sharma JB Kandpal Ashok Behera Basel A. Abdel Wahab Mohammed Abdelmalek Orabi Masood Medleri Khateeb Shafiuddin Habeeb Mohammed Marwa Bakir Tags: Review Source Type: research

Molecules, Vol. 28, Pages 3274: Preparation of Mesoporous Si Nanoparticles by Magnesiothermic Reduction for the Enhanced Reactivity
In this study, mesoporous silicon nanoparticles (M-Si) were successfully prepared by a magnesiothermic reduction of mesoporous silica nanoparticles, which were synthesized by a templated sol-gel method and used as the precursors. M-Si exhibited a uniform size distribution with an average diameter of about 160 nm. The measured BET surface area was 93.0 m2 g−1, and the average pore size calculated by the BJH method was 16 nm. The large internal surface area provides rich reaction sites, resulting in unique interfacial properties and reduced mass diffusion limitations. The mechanism of the magnesiothermic reduct...
Source: Molecules - April 6, 2023 Category: Chemistry Authors: Xinwen Ma Weiduo Fei Xiandie Zhang Jie Ji Xiang Zhou Tags: Article Source Type: research