Results 41 to 50 of about 362,061 (261)

Kinetics Modeling of Glycerol Carbonate Synthesis from Glycerol and Urea over Amberlyst-15 Catalyst

open access: yesIndonesian Journal of Chemistry, 2019
Synthesize of glycerol carbonate from glycerol and urea is an attractive path as glycerol carbonate has a large potential as a green solvent. The aim of the present study was to develop a kinetic model of glycerol carbonate synthesis with amberlyst-15 ...
Hary Sulistyo   +3 more
doaj   +1 more source

Recent advances in processes and catalysts for glycerol carbonate production via direct and indirect use of CO2

open access: yesJournal of CO2 Utilization
Glycerol can be utilised as a renewable feedstock in several chemical reactions, including carbonation, carbonylation, transesterification, and oxidation.
Patcharaporn Inrirai   +4 more
doaj   +1 more source

Conférence Chevreul

open access: yesOléagineux, Corps gras, Lipides, 2004
In this study two major strategy of transformation of the vegetables substrate are exposed. The first approach is related to the study of the catalytic heterocyclisation of natural glycerin in the glycerol carbonate.
Mouloungui Zéphirin
doaj   +1 more source

Li掺杂CeO2固体碱催化甘油酯交换合成碳酸甘油酯

open access: yesZhongguo youzhi, 2023
针对由甘油制备碳酸甘油酯的酯交换法中催化剂制备方法复杂、活性组分易流失等问题,采用一锅法制备了Li掺杂CeO2固体碱催化剂。对催化剂进行了X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)、BET、X射线光电子能谱(XPS)、CO2程序升温脱附(CO2-TPD)等表征。以甘油转化率和碳酸甘油酯产率为指标,对催化剂进行了筛选,并采用单因素实验对甘油酯交换合成碳酸甘油酯的工艺条件进行了优化,同时考察了催化剂的重复使用性能。结果表明:Li与CeO2之间能够产生协同作用 ...
陈一峰,范明明,冷炎,蒋平平,张萍波 CHEN Yifeng, FAN Mingming, LENG Yan, JIANG Pingping, ZHANG Pingbo
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

THE SYNTHESIS OF GLYCEROL CARBONATE FROM GLYCEROL AND CARBON DIOXIDE OVER HETEROGENEOUS CATALYSTS [PDF]

open access: yes, 2018
The aim of this work is to synthesise glycerol carbonate from carbon dioxide (CO2) and glycerol. Two key challenges that were investigated in this work including: (1) thermodynamic limitation of this work and (2) desirability of using crude glycerol ...
Razali, N A
core   +6 more sources

A Rapid and Green Method for the Preparation of Solketal Carbonate from Glycerol

open access: yesReactions
Glycerol is a biogenic waste that is generated in both the biodiesel and oleo-chemical industries. The value addition of surplus glycerol is of utmost importance for making these industries economically profitable.
Sanjib Kumar Karmee   +3 more
doaj   +1 more source

L‐aspartate oxidase provides new insights into fumarate reduction in anaerobic darkness in Synechocystis sp. PCC6803

open access: yesFEBS Letters, EarlyView.
Synechocystis strains deficient in succinate dehydrogenase (SDH) secrete more succinate than the WT under dark anaerobic conditions, supporting that SDH then primarily acts as SDH, not as a fumarate reductase. L‐aspartate oxidase (Laspo) from Synechocystis is functional under anaerobic conditions, reducing fumarate to succinate.
Kateryna Kukil   +3 more
wiley   +1 more source

Membrane composition and thermodynamic identity as boundaries of life for synthetic cell research

open access: yesFEBS Letters, EarlyView.
What makes a cell a cell? The boundary of a living cell is not just a wall. Read as a Markov blanket, the membrane separates internal from external states, generating identity and non‐equilibrium order. Can this identity be rebuilt from scratch in a synthetic cell?
Caterina Presutti, Bert Poolman
wiley   +1 more source

Copper-Catalyzed Asymmetric Sulfonylative Desymmetrization of Glycerol

open access: yesMolecules, 2022
Glycerol is the main side product in the biodiesel manufacturing process, and the development of glycerol valorization methods would indirectly contribute the sustainable biodiesel production and decarbonization.
Kosuke Yamamoto   +5 more
doaj   +1 more source

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