Results 31 to 40 of about 48,679 (293)

Enantioseparation and stereoselective dissipation of the novel chiral fungicide pydiflumetofen by ultra-high-performance liquid chromatography tandem mass spectrometry

open access: yesEcotoxicology and Environmental Safety, 2021
Pydiflumetofen is a novel and efficient broad-spectrum chiral fungicide consisting of a pair of enantiomers. A simple and sensitive chiral analytical method was established to determine the enantiomers of this chiral fungicide in food and environmental ...
Zhen Wang   +8 more
doaj   +1 more source

Cromatografia gasosa quiral na resolução de enantiômeros envolvidos em flavours de frutas

open access: yesQuímica Nova, 2014
This work addresses the use of chiral gas chromatography in resolving optically active stereoisomers and racemates found in fruit flavours. It presents the types of chiral selectors applied to terpene-derived metal coordination compounds, polysiloxane ...
Alexandre Porte   +2 more
doaj   +1 more source

Pharmacological evaluation of enantiomerically separated positive allosteric modulators of cannabinoid 1 receptor, GAT591 and GAT593

open access: yesFrontiers in Pharmacology, 2022
Positive allosteric modulation of the type 1 cannabinoid receptor (CB1R) has substantial potential to treat both neurological and immune disorders.
Asher L. Brandt   +10 more
doaj   +1 more source

Separation of Enantiomers through Local Vorticity: A Screw Model Mechanism

open access: yes, 2021
We present a model to explain the mechanism behind enantiomeric separation under either shear flow or local rotational motion in a fluid. Local vorticity of the fluid imparts molecular rotation that couples to translational motion, sending enantiomers in
J. Daniel, Gezelter, Anderson, Duraes
core   +1 more source

Effect of Cd/Cu on the toxicity and stereoselective environmental behavior of dinotefuran in earthworms Eisenia foetida

open access: yesEcotoxicology and Environmental Safety, 2023
Pesticides and heavy metals commonly coexist in soil. In this study, the influence of Cd and Cu on the toxicity of rac-dinotefuran and the enantioselective behavior of dinotefuran enantiomers in soil-earthworm microcosms were investigated.
Yirong Zhang   +3 more
doaj   +1 more source

Enhanced mechanical and thermal strength in mixed enantiomers based supramolecular gel [PDF]

open access: yes, 2018
Mixing supramolecular gels based on enantiomers leads to re-arrangement of gel fibers at the molecular level, which results in more favorable packing and tuneable properties.
António A. Vicente (5855534)   +15 more
core   +1 more source

(±)-Peniorthoesters A and B, Two Pairs of Novel Spiro-Orthoester en-antiomers With an Unusual 1,4,6-Trioxaspi-ro[4.5]decane-7-One Unit From Penicillium minioluteum

open access: yesFrontiers in Chemistry, 2018
(±)-Peniorthoesters A and B (±1 and ±2), two pairs of unprecedented spiro-orthoester enantiomers with a 1,4,6-trioxaspiro[4. 5]decane-7-one unit, were obtained from Penicillium minioluteum. Their structures were determined by spectroscopic methods, X-ray
Xiaorui Liu   +10 more
doaj   +1 more source

Enantiospecific effects of ketoconazole on aryl hydrocarbon receptor. [PDF]

open access: yesPLoS ONE, 2014
Azole antifungal ketoconazole (KET) was demonstrated to activate aryl hydrocarbon receptor (AhR). Since clinically used KET is a racemic mixture of two cis-enantiomers (2R,4S)-(+)-KET and (2S,4R)-(-)-KET, we examined the effects of KET enantiomers on AhR
Aneta Novotna   +8 more
doaj   +1 more source

Enantioselective Monitoring of Biodegradation of Ketamine and Its Metabolite Norketamine by Liquid Chromatography

open access: yesChemosensors, 2021
Ketamine (K) and its main metabolite, norketamine (NK), are chiral compounds that have been found in effluents from wastewater treatment plants (WWTPs) and aquatic environments.
Ariana Pérez-Pereira   +4 more
doaj   +1 more source

Development of novel chiral capillary electrophoresis methods for the serotonin receptor (5-HT2A) antagonist MDL 100,907 (volinanserin) and for its key intermediate compound [PDF]

open access: yes, 2014
Enantioselective capillary electrophoretic methods were elaborated for the determination of the enantiomeric purity of (R)-MDL 100,907 and its preparatively resolved key intermediate compound during the synthesis route. The pKa values of the intermediate
Palkó, Roberta   +3 more
core   +1 more source

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