It is now possible to study the hydrolysis reactions of esters under conditions where the substrate is completely protonated. The properties of the protonated ester, however, are more conveniently examined using more strongly acidic media, in the absence of water, where bimolecular reactions are ...
Staphylococci hydrolysed esters at a high rate between 15 and 25 °C; acidic conditions inhibited the hydrolysis. The hydrolysis was also reduced when the water activity was decreased by addition of polyethylene glycol or glycerol. 展开 关键词: esters, esteres, free fatty acids, sausages, ...
水解ofin酸性条件下内酯水解 系统标签: hydrolysislactonemechanismsacidic水解酸性 MechanismsofLactoneHydrolysisinAcidicConditionsRafaelGómez-Bombarelli,†EmilioCalle,‡andJulioCasado*,‡†DepartmentofPhysics,SchoolofEngineeringandPhysicalSciences,Heriot-WattUniversity,EH144ASEdinburgh,U.K.‡DepartamentodeQu...
In the end, SA was produced by the microbial fermentation of sugar. Under optimized conditions, the yields of 134.25 g/L at the laboratory scale can be achieved [20]. However, production costs and feasibility should be considered during the biological production of SA on a large scale. New ...
Therefore, it can be concluded that breaking of hydrogen bonds as a result of the forming of the complexes and esters and the depolymerization of macromolecular chains, are the main factors causing the cellulose dissolution in the concentrated solutions [174]. Hydrolysis of β-1-4 glucosidic ...
Taft used the Ingold notification about the hydrolysis of esters in acidic and alkaline media to separate the steric and polarity effects10. In this it is assumed that the activated complex is tetrahedral, and that the protons and hydroxide ions are too small to change the steric strain during...
2.447448JOURNALOFTHESOCIETYOFCOSMETICCHEMISTSemulsionhydrolysesproceedtocompletion.Inanattempttoexplaintheseobservations,itwaspostulated(3)thatthesurface-activespecieswasanassociationcomplexofanalcoholandanester,asuggestionwhichwasinaccordwiththeknownbehaviourofmixturesofwax-alcoholsandtheirestersasw/oemulsifyingagents.Thus...
Crystallization and preliminary crystallographic analysis of the major acid phosphatase from Legionella pneumophila histidine acid phosphatase (HAP) sequence motif RHGXRXP responsible for the hydrolysis of a phosphoryl group from phosphate monoesters under acidic conditions... Z Dan,P Yang,X Chen,... ...
Reaction mechanism for the kinetic study in the conversion of cellulose to HMF. Full size image The production of HMF occurs in an acidic environment. Generally, two types of acid catalysts can be applied in the conversion process with both their advantages and disadvantages. A first group are ...
Enzymatic hydrolysis of proteins from yellowfin tuna wastes using Alcalase J. Mol. Catal. B: Enzymatic (2001) J.K.Bashkin Hydrolysis of phosphates, esters and related substrates by models of biological catalysts Curr. Opin. Chem. Biol.