نتایج جستجو برای: maleic acid
تعداد نتایج: 748533 فیلتر نتایج به سال:
Alcoholic beverages produced by fermentation (e.g., beer and wine) are powerful stimulants of gastric acid output and gastrin release in humans. The aim of this study was to separate and specify the gastric acid stimulatory ingredients in alcoholic beverages produced by fermentation. Yeast-fermented glucose was used as a simple model of fermented alcoholic beverages; it was stepwise separated b...
• The photocatalytic partial conversion of maleic acid in green conditions was studied the presence TiO 2 based catalysts. effect pH and addition two different acids were investigated. best selectivity towards succinic 23.2 % at 70 = 1. Fumaric also formed as another high added value compound. This study reports anaerobic reduction to aqueous dispersion photocatalysts. Some home prepared commer...
The Cover Feature shows acid hydrotropic fractionation (AHF) of lignocellulosic plant biomass at atmospheric pressure, to result in cellulose-rich water-insoluble solids, a light colored and minimally condensed lignin, dissolved xylose sugar stream, using only recyclable hydrotrope such as maleic acid. More information can be found the Minireview by J. Zhu et al.
CLEFMA, 4-(3,5-bis(2-chlorobenzylidene)-4-oxo-piperidine-1-yl)-4-oxo-2-butenoic acid, is a new chemical entity with anti-cancer and anti-inflammatory activities. Here, we report its stability in solution against stress conditions of exposure to acid/base, light, oxidant, high temperature, and plasma. The identity of the degradation products was ascertained by mass and proton nuclear magnetic re...
Vanadium phosphate catalysts have been widely studied for the selective oxidation of alkanes to a variety of products, including maleic and phthalic anhydride. More recently they are starting to find use as low temperature liquid phase oxidation catalysts. For all these applications the synthesis of the precursor is key to the performance of the final catalyst. Changes in the preparation proced...
Layer-by-layer (LBL) electrostatic assembly of poly-electrolytes is proving to be an increasingly rich and versatile technique for the formation of multilayered thin films with a wide range of electrical, magnetic, and optical properties. In the present work we synthesized a new nonlinear optical (NLO) maleic acid copolymer containing Disperse Red 1 moieties, built-up multilayer assemblies by a...
Petrochemical based polymers, paints and coatings are cornerstones of modern industry but our future sustainable society demands greener processes renewable feedstock materials. A challenge is to access platform monomers from biomass resources while integrating the principles green chemistry in their chemical synthesis. We present a synthesis route starting biomass-derived furfural towards comm...
In this study, maleic acid was produced from xylose contained in a hydrolysate generated by oxalic pretreatment of yellow poplar (Liriodendron tulipifera), and the factors that influenced production were evaluated. Furfural obtained using H2SO4 as catalyst, depending on combined severity (CSFs). increased concentration increased. yield (46.70%), conversion (70.95%), xylo–oligomer (75.47%) high ...
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