Results 91 to 100 of about 33,103 (197)

Mirror image hydrocarbons from Tropical and Boreal forests [PDF]

Atmospheric Chemistry and Physics, 2007
Monoterpenes, emitted in large quantities by trees to attract pollinators and repel herbivores, can exist in mirror image forms called enantiomers. In this study such enantiomeric pairs have been measured in ambient air over extensive forest ecosystems ...
J. Williams, N. Yassaa, S. Bartenbach, J. Lelieveld   +3 more
doaj  

Resolution, quantification, and reliable determination of enantiomeric excess of proteinogenic and non-proteinogenic amino acids by comprehensive two-dimensional gas chromatography. [PDF]

J Sep Sci, 2022
Pepino R, Leyva V, Garcia AD, Bocková J, Meinert C.   +4 more
europepmc   +1 more source

Stability of racemic and chiral steady states in open and closed chemical systems

, 2008
The stability properties of models of spontaneous mirror symmetry breaking in chemistry are characterized algebraically. The models considered here all derive either from the Frank model or from autocatalysis with limited enantioselectivity.
Avetisov, Benson, Blackmond, Blackmond, Brandenburg, Brandenburg, Caglioti, Chang, Crusats, David Hochberg, Eigen, Frank, Ganti, Giaquinta, Gleiser, Gleiser, Gleiser, Gridnev, Gutman, Hochberg, Hochberg, Hochstim, Josep M. Ribó, Kawasaki, Kawasaki, Kondepudi, Lebon, Lente, Mason, Mason, Mauksch, Mauksch, Mikami, Mills, Noorduin, Plasson, Plasson, Quack, Rivera Islas, Saito, Sandars, Soai, Soai, Viedma, Wattis   +44 more
core   +1 more source

Bipolar Electrochemical Measurement of Enantiomeric Excess with Inherently Chiral Polymer Actuators. [PDF]

ACS Meas Sci Au, 2021
Arnaboldi S, Salinas G, Bonetti G, Cirilli R, Benincori T, Kuhn A.   +5 more
europepmc   +1 more source

Chirality imprinting and direct asymmetric reaction screening using a stereodynamic Brønsted/Lewis acid receptor

Nature Communications, 2016
Determining results of asymmetric reactions can take long periods of time and consume large amounts of organic solvents during work-up and analysis. Here, the authors report a bifunctional organic probe that can bind to chiral hydroxyacids, and provide ...
Keith W. Bentley, Daysi Proano, Christian Wolf   +2 more
doaj   +1 more source

A Racemic Naphthyl-Coumarin-Based Probe for Quantitative Enantiomeric Excess Analysis of Amino Acids and Enantioselective Sensing of Amines and Amino Alcohols. [PDF]

ChemistryOpen, 2022
Li JY, Wang L, Yin LP, Jiang XM, Guo K, Zhang C, Yu SS, Yu XQ, Wang Q.   +8 more
europepmc   +1 more source

Fluorine-containing substituents: metabolism of the α,α-difluoroethyl thioether motif

Beilstein Journal of Organic Chemistry, 2019
We report the metabolism of the recently introduced α,α-difluoroethyl thioether motif to explore further its potential as a substituent for bioactives discovery chemistry. Incubation of two aryl–SCF2CH3 ethers with the model yeast organism Cunninghamella
Andrea Rodil, Alexandra M. Z. Slawin, Nawaf Al-Maharik, Ren Tomita, David O’Hagan   +4 more
doaj   +1 more source

Helical springs as a color indicator for determining chirality and enantiomeric excess. [PDF]

Sci Adv, 2021
Maeda K, Hirose D, Nozaki M, Shimizu Y, Mori T, Yamanaka K, Ogino K, Nishimura T, Taniguchi T, Moro M, Yashima E.   +10 more
europepmc   +1 more source

Catalytic enantioselective synthesis of quaternary carbon stereocentres. [PDF]

, 2014
Quaternary carbon stereocentres-carbon atoms to which four distinct carbon substituents are attached-are common features of molecules found in nature. However, before recent advances in chemical catalysis, there were few methods of constructing single ...
Overman, Larry E, Quasdorf, Kyle W
core  

Data-Driven Prediction of Circular Dichroism-Based Calibration Curves for the Rapid Screening of Chiral Primary Amine Enantiomeric Excess Values. [PDF]

J Am Chem Soc, 2022
Howard JR, Bhakare A, Akhtar Z, Wolf C, Anslyn EV.   +4 more
europepmc   +1 more source