Results 21 to 30 of about 228,636 (318)

Chiral extensions of chiral polytopes

open access: yesDiscrete Mathematics, 2014
Given a chiral d-polytope K with regular facets, we describe a construction for a chiral (d + 1)-polytope P with facets isomorphic to K. Furthermore, P is finite whenever K is finite. We provide explicit examples of chiral 4-polytopes constructed in this way from chiral toroidal maps.
Gabe Cunningham, Daniel Pellicer
openaire   +3 more sources

Chiral Nanomaterials and Chiral Light [PDF]

open access: yesOptics and Photonics News, 2016
Advances in nanofabrication are expanding opportunities to exploit and customize the “handedness” of materials-and of light itself.
openaire   +1 more source

Chiral Aspects of Local Anesthetics

open access: yesMolecules, 2020
Thanks to the progress made in chemical technology (particularly in the methodologies of stereoselective syntheses and analyses) along with regulatory measures, the number of new chiral drugs registered in the form of pure enantiomers has increased over ...
Ružena Čižmáriková   +4 more
doaj   +1 more source

Opportunities Offered by Chiral η6-Arene/N-Arylsulfonyl-diamine-RuII Catalysts in the Asymmetric Transfer Hydrogenation of Ketones and Imines

open access: yesMolecules, 2011
Methods for the asymmetric transfer hydrogenation (ATH) of ketones and imines are still being intensively studied and developed. Of foremost interest is the use of Noyori’s [RuCl(η6-arene)(N-TsDPEN)] complexes in the presence of a hydrogen donor (i-PrOH,
Libor Červený   +3 more
doaj   +1 more source

Constraints on chiral operators in N=2 SCFTs [PDF]

open access: yes, 2014
: We study certain higher-spin chiral operators in (formula presented)(formula presented) superconformal field theories (SCFTs). In Lagrangian theories, or in theories related to Lagrangian theories by generalized Argyres-Seiberg-Gaiotto duality (“type A”
Matthew Buican   +5 more
core   +1 more source

Asymmetric Synthesis of US-FDA Approved Drugs over Five Years (2016–2020): A Recapitulation of Chirality

open access: yesPharmaceuticals, 2023
Chirality is a major theme in the design, discovery, and development of new drugs. Historically, pharmaceuticals have been synthesized as racemic mixtures. However, the enantiomeric forms of drug molecules have distinct biological properties.
Rekha Tamatam, Dongyun Shin
doaj   +1 more source

Chiral plasmonics and enhanced chiral light-matter interactions [PDF]

open access: yes, 2019
International audienceChirality, which describes the broken mirror symmetry in geometric structures, exists macroscopically in our daily life as well as microscopically down to molecular levels. Correspondingly, chiral molecules interact differently with
Qiu, Cheng-Wei   +5 more
core   +1 more source

Method for the simultaneous enantioselective analysis of 21 natural amino acids and its application to analytics of fluorenylmethoxycarbonyl-derivatives under liquid chromatography conditions

open access: yesJournal of Chromatography Open
The aim of this short communication is to show effective solutions for the control of enantiomeric excess simultaneously on free and protected amino acids (AAs).
Antoine Falatas   +4 more
doaj   +1 more source

Stereoselective Synthesis of Flavonoids: A Brief Overview

open access: yesMolecules, 2023
Stereoselective synthesis has been emerging as a resourceful tool because it enables the obtaining of compounds with biological interest and high enantiomeric purity. Flavonoids are natural products with several biological activities.
Ana Margarida Pereira   +2 more
doaj   +1 more source

Chiral behaviour and screening masses close to the chiral phase transition

open access: yes, 1994
Laermann E, Boyd G, Gupta S, Karsch F, Petersson B, Redlich K. Chiral behaviour and screening masses close to the chiral phase transition. Nuclear Physics, B: Proceedings Supplements.
Karsch, Frithjof   +9 more
core   +1 more source

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