Results 11 to 20 of about 13,428 (198)

Tailored Stereo-Configuration of Crosslinkable Polyester-Based Solid Polymer Electrolytes for All-Solid-State and Binder-Free Li Metal Batteries. [PDF]

open access: yesAdv Sci (Weinh)
Variations in polymer conformations of unsaturated poly(n‐alkyl esters) driven by monomer‐level stereochemistry directly govern Li+ solvation structures in polymer host matrices. The synergistic strategies of polymer conformation control, UV‐induced interchain crosslinking, and end‐group fluorination are implemented for engineering advanced solid ...
Song HJ   +11 more
europepmc   +2 more sources

Early contributions of crystallography to the atomic theory of matter

open access: yesSubstantia, 2019
After briefly presenting early hypotheses on the submicroscopic origin of symmetry and polyhedral morphology in the crystals, the structural model proposed by Haüy in 1784, based on the periodic repetition of integrant molecules made up of simple ...
Giovanni Ferraris
doaj   +1 more source

Pyrethroid Stereoisomerism: Diastereomeric and Enantiomeric Selectivity in Environmental Matrices – A Review

open access: yesOrbital: The Electronic Journal of Chemistry, 2018
Pyrethroids are chiral insecticides characterized by stereoisomerism, which occurs due to the presence of one to three asymmetric (chiral) carbons, generating one or two pairs of cis/trans diastereomers, and two or four pairs of enantiomers ...
Cláudio Ernesto Taveira Parente   +3 more
doaj   +3 more sources

Stereoisomerism and Conformational Directionality (Prelog Lecture)

open access: yesCHIMIA, 1986
The inaugural Prelog Lecture provides me with a unique opportunity to pay tribute to a great scientist, teacher, and friend. As I hope to show, the work of Vladimir Prelog is profoundly relevant to the work that I want to describe today.
Kurt Mislow
doaj   +1 more source

Stereoselective formation of bismuth complexes by transmetalation of lead with adaptable overhanging carboxylic acid 5,10-strapped porphyrins

open access: yesComptes Rendus. Chimie, 2021
Out-of-plane deformations of metalloporphyrin skeletons have been well documented as playing important roles in relevant biological processes. In contrast, out-of-plane binding to the N-core of large metal cations as period 6 post-transition elements has
Barakat, Wael   +5 more
doaj   +1 more source

The role of stereochemistry of antibiotic agents in the development of antibiotic resistance in the environment

open access: yesEnvironment International, 2020
Antibiotic resistance (ABR) is now recognised as a serious global health and economic threat that is most efficiently managed via a ‘one health’ approach incorporating environmental risk assessment.
Felicity C.T. Elder   +4 more
doaj   +1 more source

Friedel-Crafts chemistry. Part 55. Competing indan versus tetralin ring formations during Friedel-Crafts intramolecular cyclialkylations of some selected di-, tri- and tetraphenylated alkanols [PDF]

open access: yesAssiut University Journal of Multidisciplinary Scientific Research, 2018
Friedel-Crafts cyclialkylations of six phenylated alkanols 2a-f to new substituted indans andtetralins mediated by AlCl3/CH3NO2, 85% H2SO4 and/or PPA are described.
doaj   +1 more source

Hepatic Organoid-Based High-Content Imaging Boosts Evaluation of Stereoisomerism-Dependent Hepatotoxicity of Stilbenes in Herbal Medicines

open access: yesFrontiers in Pharmacology, 2022
The complexity of chemical components of herbal medicines often causes great barriers to toxicity research. In our previous study, we have found the critical divergent hepatotoxic potential of a pair of stilbene isomers in a famous traditional Chinese ...
Juan Liu   +12 more
doaj   +1 more source

Analysis of cis-isomer-enriched dihydroquercetin sample by 1D and 2D NMR spectroscopy

open access: yesРазработка и регистрация лекарственных средств
Introduction. The structure of dihydroquercetin (DHQ) is characterized by two chiral centers at positions 2 and 3 of the benzopyran cycle, resulting in possible diastereomers: trans- and cis-isomers.
R. P. Terekhov   +5 more
doaj   +1 more source

3-(3-Azabicyclo[2, 2, 1]heptan-2-yl)-1,2,4-oxadiazoles as Novel Potent DPP-4 Inhibitors to Treat T2DM

open access: yesPharmaceuticals
Background: Type 2 diabetes mellitus (T2DM) is a prevalent metabolic disease with global implications, necessitating effective management strategies.
Tatiana V. Zinevich   +7 more
doaj   +1 more source

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