Results 31 to 40 of about 667,303 (272)

Well Plate Circular Dichroism Reader for the Rapid Determination of Enantiomeric Excess. [PDF]

Chem Sci, 2014
Metola P, Nichols SM, Kahr B, Anslyn EV.
europepmc   +2 more sources

Asymmetric Meerwein-Ponndorf-Verley reduction of long chain keto alkanoic acid methyl esters [PDF]

Journal of the Serbian Chemical Society, 2007
3-, 7- and 13-Monoketo tetradecanoic acid methyl esters carrying a keto group at the ends and at the middle of the chain with 14 carbon atoms were reduced by a Meerwein-Ponndorf-Verley reaction in the presence of R-(+)-1,1'-binaphthalene- 2,2'-diol, 1,2 ...
Onar Çelik Hülya, Hasdemir Belma, Yusufoğlu Ayse   +2 more
doaj   +3 more sources

Effect of 50% enantiomeric excess bupivacaine mixture combined with pancuronium on neuromuscular transmission in rat phrenic nerve-diaphragm preparation; a pilot study

Indian Journal of Anaesthesia, 2015
Background and Aims: Local anaesthetics are drugs that are widely used in clinical practice. However, the effects of these drugs on the neuromuscular junction and their influence on the blockade produced by non-depolarising neuromuscular blocking drugs ...
Angelica de Fátima de Assunção Braga, Vanessa Henriques Carvalho, Franklin Sarmento da Silva Braga, Gloria Maria Braga Potério, Filipe Nadir Caparica Santos, Fernando Eduardo Féres Junqueira   +5 more
doaj   +1 more source

Organocatalytic Properties of 3,4-Dihydroxyprolines

Chemistry Proceedings, 2023
The synthesis and organocatalytic properties of (2S,3R,4R)-3,4-bis((tert-butyldimethylsilyl)oxy)pyrrolidine-2-carboxylic acid are reported. Using the aldol condensation of cyclohexanone with p-nitrobenzaldehyde as a model, a yield of 86%, an enantiomeric
Ramón J. Estévez, Rosalino Balo, Andrés Fernández, Juan C. Estévez   +3 more
doaj   +1 more source

Corylus avellana L. Natural Signature: Chiral Recognition of Selected Informative Components in the Volatilome of High-Quality Hazelnuts

Frontiers in Plant Science, 2022
The volatile fraction of plant-based foods provides useful functional information concerning sample-related variables such as plant genotype and phenotype expression, pedoclimatic and harvest conditions, transformation/processing technologies, and can be
Federico Stilo, Federico Stilo, Marta Cialiè Rosso, Simone Squara, Carlo Bicchi, Chiara Cordero, Cecilia Cagliero   +6 more
doaj   +1 more source

Enantiomeric-excess determination based on nonreciprocal-transition-induced spectral-line elimination [PDF]

, 2019
The spontaneous emission spectrum of a multi-level atom or molecule with nonreciprocal transition is investigated. It is shown that the nonreciprocal transition can lead to the elimination of a spectral line in the spontaneous emission spectrum.
Xun-Wei Xu, Chong Ye, Yong Li, Ai-xi Chen   +3 more
semanticscholar   +1 more source

Determination of the enantiomeric purity of mevalonolactone via NMR using a chiral lanthanide shift reagent.

Journal of Lipid Research, 1982
Simple methods for determining the enantiomeric purity of mevalonolactone and linalool by NMR using the chiral shift reagent Eu(hfc)3 are reported. These methods are more reliable than polarimetry and require only a few milligrams of sample to detect as ...
W K Wilson, T J Scallen, C U Morrow
doaj   +1 more source

From Microorganisms to Biosignatures: Subcritical Water Extraction as a Sample Preparation Technique for Future Life Detection Missions

Geophysical Research Letters, 2022
Amino acids are important targets in the search for life beyond Earth. The types of amino acids, their relative abundances, and enantiomeric excess all serve as biosignatures.
Zuzana Cieslarova, Aaron C. Noell, Peter A. Willis, Maria F. Mora   +3 more
doaj   +1 more source

Comparison of reversed-phase enantioselective HPLC methods for determining the enantiomeric purity of (S)-omeprazole in the presence of its related substances

Journal of Pharmaceutical Analysis, 2016
A simple analytical high-performance liquid chromatography (HPLC) method was applied for the enantiomeric excess determination of esomeprazole ((S)-OME), the enantiopure active ingredient contained in drug products, in the presence of its potential ...
Bruno Gallinella, Rosella Ferretti, Leo Zanitti, Isabella Sestili, Antonina Mosca, Roberto Cirilli   +5 more
doaj   +1 more source

Amino Acids in the Universe

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.
doaj   +1 more source