نتایج جستجو برای: racemic phenylalanine methyl ester
تعداد نتایج: 147397 فیلتر نتایج به سال:
Reaction of chiral ester linked diynes with chlorotris(triphenylphosphine)cobalt(I) and sodium cyclopentadienide gave (η(5)-cyclopentadienyl)(triphenylphosphine) cobaltacyclopentadiene complexes as single chiral-at-metal diastereoisomers, including a non-racemic example synthesised in three steps from (S)-3-butyn-2-ol.
Ethanolic leaf extract of Hyptis capitata Jacq. showed a toxic effect on Artemia salina larvae1. The was simplified through fractionation using vacuum liquid chromatography to trace compounds with biological activity. F1, F2, F3 and F4 fractions were used in the acute toxicity test A. larvae. F1 highest value 196.77±2.7 µg/ml. As an initial screening for its anticancer potential, ethanolic frac...
Background: Lipase is an enzyme with immense application potential. Ester synthesis by lipase catalysis in organic media is an area of key industrial relevance. Enzymatic preparations with traits that cater to the needs of this function are hence being intensely researched. Objective: The objectives of the study were to immobilize the lipase from Bacillus sp. PS35 by cross-linking and adsorpti...
N-Benzyloxycarbonyl derivatives of isoglutamine and isoasparagine were coupled with arginine methyl ester through the action of dicyclohexylcarbodiimide. The resulting benzyloxycarbonyl derivatives of isoglutaminylarginine methyl ester and isoasparaginylarginine methyl ester were treated with trypsin for removal of the ester groups and then with porcine pancreatic carboxypeptidase B for liberat...
The addition of co-solvent on in situ trans esterification was considered as one method to improve the extractive process and increase yield biodiesel from microalgae. In this study, with using microwave studied for improving performance produced compared without addition. optimal reaction conditions (ratio microalgae methanol 1:15 w /v; 30 ml % H2SO4) at 50 min time, Fatty Acid Methyl Ester (F...
We report the crystallographic structures of the potent phosphoantigens Phosphostim (the bromohydrin of isopentenyl pyrophosphate) and E-4-hydroxy-3-methyl-but-2-enyl pyrophosphate bound to the mevalonate pathway enzyme isopentenyl pyrophosphate/dimethylallyl pyrophosphate isomerase (IPPI). Racemic Phosphostim forms covalent complexes with IPPI: a 4-thioether with C67 and a 4-ester with E116. O...
This work presents the attempt to develop a production technology for grape–plum low-alcohol beverages and enhance their chemical composition flavor complexity through non-Saccharomyces species. Saccharomyces cerevisiae (SC) pure cultures were used as reference beverages. Pure of Lachancea thermotolerans (LT) co-inoculated with (MIX) included must fermentation at pilot scale. The process involv...
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