Results 21 to 30 of about 511,953 (205)
BIO Web of Conferences, 2014 What is the role played by amino acids in the chemistry of the interstellar medium and the emergence of life on the early Earth? Are they really the primary key compounds as free amino acids?
Guillemin J-C.
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MATEC Web of Conferences, 2015 A systematic theoretical derivation of bioresolution-inversion process was made. An equation was derived between the maximum ee value of final product (eef(max)) and enantiomeric ratio (E) of a reaction. The corresponding equations of conv.(max), eep(max)
Xu Yi, Zhou Dan, Chen Jianbo
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Enantiomeric Excess Determination of Primary Amines
, 2016 Certain organic compounds can exist in two variations, known as enantiomers. Such compounds are characterized as being “chiral”. Enantiomers can exist in either R or S configurations, and the relative proportions of one configuration to another can be ...
Ticatic, Jacylin +1 more
core +2 more sources
Angewandte Chemie, EarlyView.Mixed MtaABC/MtgABC methyltransferase systems were developed for non‐native thiol and aniline methylation using the unactivated methyl donors methanol and glycine betaine. The platform enabled site‐selective and enantioselective methylation with turnover number up to 6000, representing the first enantioselective non‐native catalysis by cobamide ...
Amardeep Kumar +3 more
wiley +2 more sources
Enantiomeric Tartaric Acid Production Using cis-Epoxysuccinate Hydrolase: History and Perspectives
Molecules, 2019 Tartaric acid is an important chiral chemical building block with broad industrial and scientific applications. The enantioselective synthesis of l(+)- and d(−)-tartaric acids has been successfully achieved using bacteria presenting cis ...
Jinsong Xuan, Yingang Feng
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Determining enantiomeric excess using indicator-displacement assays [PDF]
, 2005 The invention includes an enantioselective indicator-displacement assay useful to determine enantiomeric excess (ee) enantiomeric samples calorimetrically.
Zhu, Lei +2 more
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Accurate Determination of Enantiomeric Excess Using Raman Optical Activity
, 2022 The optical purity of a chiral sample is of particular importance to the analytical chemistry and pharmaceutical industries. In recent years, the vibrational optical activity (VOA) has become established as a sensitive and nondestructive technique for ...
Pavel Michal +5 more
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Homochiral Acyl Isocyanates as Diagnostic NMR Probes for the Enantiomeric Purity of Chiral Alcohols
Sultan Qaboos University Journal for Science, 2000 The first reported acyl and sulfonylisocyanates were developed and tested in reactions with chiral alcohols to afford diastereomeric carbamates. NMR analysis of these investigates the chemical shift discrimination that would allow these activated ...
Gregory H. P. Roos, Anthony R. Donovanb
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Plants, 2022 The aim of this study was to extract and identify the chemical compounds of Diplosthephium juniperinum essential oil (EO) from Ecuador and to assess its anticholinesterase and antioxidant properties. The EO chemical composition was determined by GC–MS. A
Melissa Salinas +4 more
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Determining enantiomeric excess using indicator-displacement assays [PDF]
, 2007 The invention includes an enantioselective indicator-displacement assay useful to determine enantiomeric excess (ee) enantiomeric samples colorimetrically.
Folmer-Andersen, Jan Frantz +2 more
core +1 more source