The ethanol dehydration process is studied regarding protonic and Ag-loaded chabazite zeolite in advanced FT-IR and UV-vis spectroscopic studies with simultaneous mass spectroscopy and gas chromatography analyses of products. The spectroscopic investigation provides information on the species formed on the surface of catalysts, while mass spectrometry and gas chromatography methods identify the desorbed products. These studies are also supported by spectroscopic, chromatographic, and thermogravimetric analyses of coke species formed over the catalyst's surface during ethanol conversion. The Ag-chabazite catalyst shows higher selectivity for ethylene and propylene; the slower formation of coke species; and, thus, a longer lifetime.
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http://dx.doi.org/10.3390/molecules29061207 | DOI Listing |
Food Chem
January 2025
Guelph Research and Development Centre, Agri- and Agri-food Canada, Guelph, ON, Canada.
Arabinoxylan-catechin complexes were synthesized using two eco-friendly methods: cold plasma and ultrasonic treatments. Their physicochemical, structural and functional properties were evaluated. Cold plasma and ultrasonic treatments did not significantly alter the molecular structure of arabinoxylan, although a decrease Mw was noticed.
View Article and Find Full Text PDFJ Trace Elem Med Biol
January 2025
Department of Plant Sciences, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan. Electronic address:
Lead (Pb) toxicity impairs the growth, yield, and biochemical traits of rice, making it essential to mitigate Pb stress in soil and restore its growth and production. This study investigated the potential of ascorbic acid-coated quantum dots (AsA-QDs) in alleviating Pb stress in two rice cultivars, Japonica (JP-5) and Indica (Super Basmati), grown in pots under Pb stress (50 mg/kg as lead chloride) with AsA-QD suspensions (50 ppm and 100 ppm) as treatments. The synthesized AsA-QDs were characterized by zeta potential (-14.
View Article and Find Full Text PDFEJNMMI Radiopharm Chem
January 2025
Department of Radioactive Materials, Instituto Nacional de Investigaciones Nucleares, Ocoyoacac, 52750, Mexico.
Background: Cancer immunotherapy is a relatively new approach to cancer treatment. Peptides that target specific pathways and cells involved in immunomodulation can potentially improve the efficacy of cancer therapy. Recently, we reported iPD-L1 as a novel inhibitor peptide that specifically targets the cancer cell ligand PD-L1 (programmed death ligand 1).
View Article and Find Full Text PDFCurr Pharm Biotechnol
January 2025
Department of Nutrition, High Institute of Public Health, Alexandria University, Alexandria, Egypt.
Background: Moringa peregrina, renowned for its extensive health benefits, continues to reveal its therapeutic potential through ongoing research. The synthesis of Moringa peregrina extract-selenium nanoparticles (MPE-SeNPs) has emerged as a promising approach in developing versatile therapeutic agents.
Objective: To evaluate the protective effects of MPE-SeNPs against oxidative damage and inflammation caused by HgCl2 exposure in mice.
RSC Adv
January 2025
Department of Physics and Chemistry, Faculty of Education, Alexandria University Egypt.
A novel series of azo dyes was successfully synthesized by combining amino benzoic acid and amino phenol on the same molecular framework azo linkage. The structural elucidation of these dyes was carried out using various spectroscopic techniques, including UV-vis, FT-IR, NMR spectroscopy, and HRMS. Surprisingly, the aromatic proton in some dyes exhibited exchangeability in DO, prompting a 2D NMR analysis to confirm this phenomenon.
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