Results 31 to 40 of about 320,740 (318)

Renewable thermoplastics – Starch fatty acid esters as alternatives to synthetics

open access: yes, 2022
Thermoplastics are an important class of polymers that find widespread use in a broad variety of applications. Because of environmental concerns regarding the lack of biodegradability of synthetic thermoplastics, green alternatives are increasingly ...
Peggy Hermann, Thomas Heinze
core   +1 more source

Phosphate Esters, Thiophosphate Esters and Metal Thiophosphates as Lubricant Additives [PDF]

open access: yes, 2013
Phosphate esters, thiophosphate esters and metal thiophosphates have been used as lubricant additives for over 50 years. While their use has been extensive, a detailed knowledge of how they work has been a much more recent development. In this paper, the
Johnson, David W., Hils, John E.
core   +2 more sources

Esterification of propanoic acid in the presence of a homogeneous catalyst [PDF]

open access: yesKragujevac Journal of Science, 2022
Esters are organic compounds that are widely used even on an industrial scale, so their production has been extensively investigated. The aim of this work is to carry out the optimization process of esterification of propionic acid with lower monohydric ...
Kastratović Vlatko R.   +2 more
doaj   +1 more source

Electrochemical Synthesis of Sulfinic Esters from Alcohols and Thiophenols [PDF]

open access: yes, 2019
Electrochemical oxidative couplings between S–H and O–H bonds are achieved herein directly from readily-available alcohols and thiophenols, affording a series of diverse sulfinic esters.
Liang, Xu, Yu, Wei, Yang, He
core   +2 more sources

Esterification of malic acid on various catalysts

open access: yesТонкие химические технологии, 2020
Objectives. The study aims to identify the optimal choice of an effective catalyst for the esterification of malic acid to produce esters of high purity. Methods. To determine the qualitative and quantitative composition of reaction masses, the following
N. S. Kuzmina   +2 more
doaj   +1 more source

Cu/ZrO2 Catalyst Modified with Y2O3 for Effective and Stable Dehydration of Glycerol to Acetol

open access: yesMolecules
Glycerol is a main by-product of biodiesel production, and its further processing is essential for the biorefinery. In this paper, a highly active and stable catalyst for the catalytic dehydration of glycerol to acetol is obtained by modifying a Cu-Zr ...
Zhoubing Liang   +5 more
doaj   +1 more source

Effect of low oxygen and high carbon dioxide atmospheres on the formation of volatiles during storage of two sweet cherry cultivars

open access: yesHorticultural Science, 2012
The aroma profiles of two sweet cherry cultivars Kordia and Vanda were investigated during storage at different oxygen and carbon dioxide levels and at a low temperature using solid phase microextraction gas chromatography combined with mass spectrometry
J. Goliáš, J. Létal, O. Veselý
doaj   +1 more source

Effects of a Small Increase in Carbon Dioxide Pressure during Fermentation on Wine Aroma

open access: yesFoods, 2020
The present study tested the effect of a slight increase in pressure (from 0 to 1 bar) during the fermentation on the wine aroma profile. Fermentations were carried out with a commercial dry yeast on Sangiovese juice in the absence of berry skins.
Lorenzo Guerrini   +5 more
doaj   +1 more source

Effect of catalytic conditions on the synthesis of new aconitate esters [PDF]

open access: yes, 2011
Sugar cane is a crop which generates large amounts of biomass and a juice rich in highvalue natural molecules. After extracting sugar from the juice, the recovering of various compounds such as organic acids contained in molasses could contribute to ...
Lacaze-Dufaure, Corinne   +10 more
core   +1 more source

CH2 Linkage Effects on the Reactivity of Bis(aminophosphine)–Ruthenium Complexes for Selective Hydrogenation of Esters into Alcohols

open access: yesScientific Reports, 2017
A novel ruthenium complex binding to two subtly different aminophosphine ligands, (o-PPh2C6H4CH2NH2)(o-PPh2C6H4NH2)RuCl2, was successfully isolated. This bis(aminophosphine)–ruthenium complex shows efficient activity in both dimethyl oxalate (DMO) and ...
Xiaolong Fang   +8 more
doaj   +1 more source

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