Filtered By:
Source: Molecules

This page shows you your search results in order of date. This is page number 3.

Order by Relevance | Date

Total 2868 results found since Jan 2013.

Molecules, Vol. 28, Pages 6361: Determination of Fluoxetine in Weight Loss Herbal Medicine Using an Electrochemical Sensor Based on rGO-CuNPs
The objective of this work is to develop and evaluate the performance of an electrochemical device by modifying a glassy carbon electrode (GC) with a nanocomposite based on reduced graphene oxide (rGO) and copper nanoparticles (CuNPs) for detecting FLU in manipulated herbal medicines. Scanning electron microscopy (FEG-SEM) and cyclic voltammetry (CV) were applied for morphological and electrochemical characterization and analysis of the composite’s electrochemical behavior. Under optimized conditions, the proposed sensor successfully detected FLU within the range of 0.6 to 1.6 µmol L&min...
Source: Molecules - August 30, 2023 Category: Chemistry Authors: Aline Giuli Melar é Francisco Contini Barreto Martin Kassio Leme Silva Rafael Plana Sim ões Ivana Cesarino Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6329: From Monoamine Oxidase Inhibition to Antiproliferative Activity: New Biological Perspectives for Polyamine Analogs
Maria Luisa Di Paolo Monoamine oxidases (MAOs) are well-known pharmacological targets in neurological and neurodegenerative diseases. However, recent studies have revealed a new role for MAOs in certain types of cancer such as glioblastoma and prostate cancer, in which they have been found overexpressed. This finding is opening new frontiers for MAO inhibitors as potential antiproliferative agents. In light of our previous studies demonstrating how a polyamine scaffold can act as MAO inhibitor, our aim was to search for novel analogs with greater inhibitory potency for human MAOs and possibly with antiproliferative ac...
Source: Molecules - August 29, 2023 Category: Chemistry Authors: Giulia Nordio Francesco Piazzola Giorgio Cozza Monica Rossetto Manuela Cervelli Anna Minarini Filippo Basagni Elisa Tassinari Lisa Dalla Via Andrea Milelli Maria Luisa Di Paolo Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6324: Biogenic Nanoparticles Silver and Copper and Their Composites Derived from Marine Alga Ulva lactuca: Insight into the Characterizations, Antibacterial Activity, and Anti-Biofilm Formation
This study is focused on biogenic silver and copper nanoparticles and their composites (UL/Ag2 O-NPS, Ul/CuO-NPs, and Ul/Ag/Cu-NCMs) produced by the marine green alga Ulva lactuca. The characterization of biogenic nanoparticles UL/Ag2 O-NPS and Ul/CuO-NPs and their composites Ul/Ag/Cu-NCMs has been accomplished by FT-IR, SEM, TEM, EDS, XRD, and the zeta potential. Minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) experiments were conducted to prove antibacterial activity against both Gram-positive and Gram-negative bacteria and anti-biofilm. The FTIR spectroscopy results indicate the exiti...
Source: Molecules - August 29, 2023 Category: Chemistry Authors: Ragaa A. Hamouda Mada A. Alharthi Amenah S. Alotaibi Asma Massad Alenzi Doha A. Albalawi Rabab R. Makharita Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6291: Molecular Profiling, Characterization and Antimicrobial Efficacy of Silver Nanoparticles Synthesized from Calvatia gigantea and Mycena leaiana against Multidrug-Resistant Pathogens
shik Arshad Farid The use of natural products isolated from mushrooms against infection, cancer diseases and other oxidative-stress-related diseases is one of the cornerstones of modern medicine. Therefore, we tried to establish a combination of medicinal mushrooms and nanotechnology possibly with the field of medicine for the development of antibacterial agents against these MDR strains. The aim of the research was to understand the molecular identification, characterization and antibacterial action of Calvatia gigantea and Mycena leaiana. The identification of fruiting body species via morpho-anatomical and molecul...
Source: Molecules - August 28, 2023 Category: Chemistry Authors: Sayab Khan Muhammad Fiaz Humaira Yasmin Junaid Ahmad Amin Ullah Zeeshan Niaz Shubana Hayat Ajaz Ahmad Prashant Kaushik Arshad Farid Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6280: Effects of Nonmagnetic Zn2+ Ion and RE Ion Substitution on the Magnetic Properties of Functional Nanomaterials Co1 & minus;yZnyRExFe2 & minus;xO4 (RE = La, Sm, Gd) by Sol & ndash;Gel
Molecules, Vol. 28, Pages 6280: Effects of Nonmagnetic Zn2+ Ion and RE Ion Substitution on the Magnetic Properties of Functional Nanomaterials Co1−yZnyRExFe2−xO4 (RE = La, Sm, Gd) by Sol–Gel Molecules doi: 10.3390/molecules28176280 Authors: Jinpei Lin Xingxing Yang Kaimin Su Fang Yang Yun He Qing Lin Magnetic Functional Nanomaterials Co1−yZnyRExFe2−xO4 (RE (rare-earth) = La,Sm,Gd) were prepared using the sol–gel combustion method. XRD characterization confirms that the ferrite samples we synthesized are single-phase cubic structures. ...
Source: Molecules - August 28, 2023 Category: Chemistry Authors: Jinpei Lin Xingxing Yang Kaimin Su Fang Yang Yun He Qing Lin Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6243: Characterization and Application of Guar Gum/Polyvinyl Alcohol-Based Food Packaging Films Containing Betacyanins from Pokeweed (Phytolacca acinosa Roxb.) Berries and Silver Nanoparticles
i Jun Liu Food packaging films were prepared by using guar gum/polyvinyl alcohol (GP) as the film matrix, 2% Ag nanoparticles (AgNPs) as reinforcing filler and antimicrobial agent, and 1%, 2% and 3% pokeweed betacyanins (PB) as the colorant and antioxidant agent. The structures and color-changing, barrier, mechanical, thermal and antioxidant/antibacterial properties of different films were measured. The results show that the PB were pH-sensitive pigments with pink, purple and yellow colors at pH 3–8, pH 9–11 and pH 12, respectively. PB improved the compatibility of guar gum and polyvinyl a...
Source: Molecules - August 25, 2023 Category: Chemistry Authors: Xiaoqian Huang Jiangfeng Song Fengfeng Xu Dawei Yun Chenchen Li Jun Liu Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6241: Enhanced Photocatalytic Degradation of Malachite Green Dye Using Silver & ndash;Manganese Oxide Nanoparticles
In this study, silver–manganese oxide nanoparticles (Ag-Mn-NPs) were synthesized through a wet chemical precipitation method and characterized as an advanced catalyst that has enhanced photocatalytic activity under sunlight irradiation. The nanoparticles were characterized using scanning electron microscopy (SEM), XRD, UV–vis light spectra, and energy-dispersive X-ray (EDX) spectroscopy, revealing their spherical and agglomerated form. The EDX spectra confirmed the composition of the nanoparticles, indicating their presence in oxide form. These bimetallic oxide nanoparticles were employed as pho...
Source: Molecules - August 25, 2023 Category: Chemistry Authors: Zhong Xu Noor Zada Fazal Habib Hamid Ullah Kashif Hussain Naveed Ullah Marwa Bibi Maria Bibi Huma Ghani Suliman Khan Khitab Hussain Xinyan Cai Habib Ullah Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6233: Developing an Electrochemically Reversible Switch for Modulating the Optical Signal of Gold Nanoparticles
In this study, we propose a novel approach to address these challenges by constructing a reversible electrochemical switch. The switch (ITO-OMAD) involves covalently linking nitroxide radicals and AuNPs (AuNPs-NO•), followed by tethering this nanocomposite to a siloxane-derived indium tin oxide (ITO) electrode. By simply electrochemically oxidizing/reducing the nitroxide units, one is able to reversibly modulate the optical properties of AuNPs at will. The surface morphology and structure of the as-prepared ITO-OMAD electrode were characterized through scanning electron microscopy (SEM) and cyclic voltammetry ...
Source: Molecules - August 24, 2023 Category: Chemistry Authors: Mengran Tang Long Zhang Xiaoxue Song Long Zhao Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6213: Advances in Biodegradable Polymers and Biomaterials for Medical Applications & mdash;A Review
Molecules, Vol. 28, Pages 6213: Advances in Biodegradable Polymers and Biomaterials for Medical Applications—A Review Molecules doi: 10.3390/molecules28176213 Authors: Małgorzata Oleksy Klaudia Dynarowicz David Aebisher The introduction of new materials for the production of various types of constructs that can connect directly to tissues has enabled the development of such fields of science as medicine, tissue, and regenerative engineering. The implementation of these types of materials, called biomaterials, has contributed to a significant improvement in the quality of human life in terms of health...
Source: Molecules - August 24, 2023 Category: Chemistry Authors: Ma łgorzata Oleksy Klaudia Dynarowicz David Aebisher Tags: Review Source Type: research

Molecules, Vol. 28, Pages 6194: Fabrication of Ag-CaCO3 Nanocomposites for SERS Detection of Forchlorfenuron
In this study, Ag-CaCO3 nanocomposites were synthesized using silver nitrate as the precursor solution based on calcium carbonate nanoparticles (CaCO3 NPs). The synthesis involved the reaction of calcium lignosulphonate and sodium bicarbonate. The properties of Ag-CaCO3 nanocomposites were studied by various technologies, including an ultraviolet–visible spectrophotometer, a transmission electron microscope, and a Raman spectrometer. The results showed that Ag-CaCO3 nanocomposites exhibited a maximum UV absorption peak at 430 nm, the surface-enhanced Raman spectroscopy (SERS) activity of Ag-CaCO3 nanocomposit...
Source: Molecules - August 23, 2023 Category: Chemistry Authors: Fangyi Qin Rongjun Liu Qiong Wu Shulong Wang Fa Liu Qingmin Wei Jiayao Xu Zhihui Luo Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6162: Exploring the Influence of Chemical Conditions on Nanoparticle Graphene Oxide Adsorption onto Clay Minerals
Ahmed S. Elrys High concentrations of graphene oxide (GO), a nanoparticle substance with rapid manufacturing development, have the ability to penetrate the soil surface down to the mineral-rich subsurface layers. The destiny and distribution of such an unusual sort of nanomaterial in the environment must therefore be fully understood. However, the way the chemistry of solutions impacts GO nanoparticle adsorption on clay minerals is still unclear. Here, the adsorption of GO on clay minerals (e.g., bentonite and kaolinite) was tested under various chemical conditions (e.g., GO concentration, soil pH, and cation valence)...
Source: Molecules - August 21, 2023 Category: Chemistry Authors: Marwa I. M. Ibrahim Elsayed A. M. Awad Salah M. M. Dahdouh Wafaa M. T. El-Etr Samy A. Marey Ashraf Atef Hatamleh Mohsin Mahmood Ahmed S. Elrys Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6157: Multi-Functional Electrospun AgNO3/PVB and Its Ag NP/PVB Nanofiber Membrane
This study focuses on the fabrication of fiber membranes containing different concentrations of AgNO3 via the electrospinning technique. The AgNO3 present in the fibers is subsequently reduced to silver nanoparticles (Ag NPs) through UV irradiation. The resulting nanofiber film is characterized using scanning electron microscopy, X-ray diffraction, and evaluations of its anti-UV and anti-electromagnetic radiation properties. Experimental results demonstrate that increasing the AgNO3 content initially decreases and then increases the fiber diameter and fiber diameter deviation. Under UV light, the nanofibers fuse and bond, ...
Source: Molecules - August 21, 2023 Category: Chemistry Authors: Taohai Yan Shengbin Cao Yajing Shi Luming Huang Yang Ou R. Hugh Gong Tags: Article Source Type: research

Molecules, Vol. 28, Pages 6154: Research Progress on Displacement Mechanism of Supercritical CO2 in Low-Permeability Heavy Oil Reservoir and Improvement Mechanism of Displacement Agents
ing Zhang With the continuous growth of global energy demand and the late stage of conventional oilfield exploitation, the demand for developing and utilizing low-permeability heavy oil reservoirs is becoming increasingly urgent. However, the exploitation of low-permeability heavy oil reservoirs faces many challenges due to their high viscosity, low permeability, and complex geological conditions. To overcome these challenges, researchers have gradually introduced SC-CO2 as an oil displacement agent in the exploitation of heavy oil reservoirs. However, the oil displacement mechanism of SC-CO2 in low-permeability heavy ...
Source: Molecules - August 21, 2023 Category: Chemistry Authors: Yuanxiu Sun Weijie Zhang Jinlong Tian Yanzhao Meng Liping Zhang Tags: Review Source Type: research

Molecules, Vol. 28, Pages 6141: Hirsutine, an Emerging Natural Product with Promising Therapeutic Benefits: A Systematic Review
d Torequl Islam Fruits and vegetables are used not only for nutritional purposes but also as therapeutics to treat various diseases and ailments. These food items are prominent sources of phytochemicals that exhibit chemopreventive and therapeutic effects against several diseases. Hirsutine (HSN) is a naturally occurring indole alkaloid found in various Uncaria species and has a multitude of therapeutic benefits. It is found in foodstuffs such as fish, seafood, meat, poultry, dairy, and some grain products among other things. In addition, it is present in fruits and vegetables including corn, cauliflower, mushrooms, po...
Source: Molecules - August 19, 2023 Category: Chemistry Authors: Md. Shimul Bhuia Polrat Wilairatana Jannatul Ferdous Raihan Chowdhury Mehedi Hasan Bappi Md Anisur Rahman Mohammad S. Mubarak Muhammad Torequl Islam Tags: Review Source Type: research

Molecules, Vol. 28, Pages 6123: The Use of Extraction on C18-Silica-Modified Magnetic Nanoparticles for the Determination of Ciprofloxacin and Ofloxacin in Meat Tissues
This study is the first utilization of silica-coated magnetic nanoparticles with attached C18 chains to extract fluoroquinolones from meat tissues. This method is therefore characterized by a very simple sample preparation procedure, but on the other hand, by satisfactory precision and accuracy. Magnetic nanoparticles with an appropriately modified surface were placed in an Eppendorf tube, then conditioned with methanol, next rinsed with water and, finally, a homogenized tissue sample was added. At the neutral pH of the sample solution, these compounds do not have a charge and are able to adsorb on the modified particles. ...
Source: Molecules - August 18, 2023 Category: Chemistry Authors: Izabella Ko śka Pawe ł Kubalczyk Micha ł Cichomski Aneta Kisielewska Tags: Article Source Type: research