Journal of Solution ChemistryRoux, A., et al., Enthalpies of reaction and reaction rates by flow microcalorimetry: Ester Hydrolysis in basic medium. Journal of Solution Chemistry, 1980. 9: p. 59-73.Roux, A.; Perron, G.; Desnoyers, J. E. Enthalpies of reaction and reaction rates by ...
The saponification of thioesters produces a carboxylate anion and a thiol. Remember, the medium, the environment is too basic for carboxylic acid to remain. It would be deprotonated, and we're going to see a carboxylate anion form instead. Nevertheless, we...
A novel method for ester hydrolysis catalyzed by enzymes having an oxyanion hole wherein the amide hydrolysis reaction is minimized. Enzymes are selected or alternatively derived by replacement of amino acid residues, which have minimal hydrogen bonding at or within 15 angstroms of the oxyanion hole...
The joint use of amylases isolated from Rhizopus, A. oryzae, and A. niger glucoamylase has been patented.1593 Acidification of the mash is not beneficial for the production of hydrolases because it inhibits the propagation of fungal mycelia. Hence, the composition of the culture medium for the...
The enantioselective catalysis ranks the privileged characteristic of enzymatic transformations. Here, we report two pyridine-linked bis(β-cyclodextrin) (bisCD) copper(II) complexes that enantioselectively hydrolyse chiral esters. Hydrolytic kinetic resolution of three pairs of amino acid ester enantiomers...
Monolayers of vinyl stearate and bulk poly(vinyl stearate) were maintained at constant pressures of 15 dyn/cm and spread on subphases of pH ranging from 2 to 12 in order to determine the extent of ester hydrolysis under these experimental conditions. Monomer films exposed to basic subphases for...
of which the slowest is the formation of acovalent bondbetween the oxygen atom of the water molecule and the carbon atom of the ester. In succeeding steps, which are very rapid, the carbon–oxygen bond of the ester breaks and hydrogen ions become detached from the original water molecule and...
Functional analysis of ethyl esters genes in the Saccharomyces genus Analysis of the expression of the ethyl ester biosynthesis genes EEB1 and EHT1 after addition of medium-chain fatty acid precursors suggested that the ... S Orlić,T Vojvoda 被引量: 0发表: 2008年 The Saccharomyces cerevisiae...
It showed that the alkyl snbstituent effect on the rate of hydrolysis of these alkylphosphonates bearing six or seven membered ester ring in alkaline medium is very similar. For the evaluation of solvent effect, the rate constants of basic hydrolysis of O, O-trimethylene alkylphosphonates in ...
It is known that lipases may have their catalytic properties improved by the action of some salts or by the adsorption on hydrophobic supports. However, what we present in this work is more than that: we evaluate the combination of these two factors of hyperactivation of lipases from Acremonium...