Results 41 to 50 of about 1,316 (180)

Enantiopure Chiral Crystals: A Powerful Tool for Absolute Asymmetric Synthesis

open access: yesAsian Journal of Organic Chemistry, Volume 14, Issue 8, August 2025.
This review covers absolute asymmetric syntheses, which allow the preparation of enantiomerically enriched chiral compounds from achiral precursors. By exploiting the crystallization of certain compounds as a conglomerate, enantiopure chiral crystals are spontaneously obtained.
Jiacheng Li, Valérie Alezra
wiley   +1 more source

Carbonylation of hair proteins: A robust biomarker of molecular and structural oxidative damage in hair fibres

open access: yesInternational Journal of Cosmetic Science, Volume 47, Issue 4, Page 604-625, August 2025.
The protein carbonylation biomarker is validated as reliable molecular damage marker to monitor hair oxidative damage (chemical and photo oxidation). It is slightly more sensitive than the cysteic acid in the case of photochemical oxidation and allows to geolocate qualitatively and quantitatively the oxidation within the hair fibre substructures ...
Camille Grosjacques   +5 more
wiley   +1 more source

Les sols forestiers, puits de méthane : un service écosystémique méconnu

open access: yesRevue Forestière Française, 2016
Le méthane est le second gaz à effet de serre, derrière le gaz carbonique, dont la concentration dans l’atmosphère augmente du fait des activités humaines.
Daniel Epron   +3 more
doaj   +1 more source

(+)-Methyl 3β-acetoxy-13-carboxy-19-hydroxy-11-oxo-C-norolean-18-en-30-oate γ-lactone

open access: yesActa Crystallographica Section E, 2010
The title compound, C33H46O7, is an unusual oxydation product of the therapeutic agent glycyrrhetinic acid that has, in comparison to the latter, a distinctly altered triterpene structure with one five- and four six-membered carbocycles complemented by a
Kurt Mereiter   +3 more
doaj   +1 more source

Une cardiomyopathie révélant un déficit en carnitine palmitoyltransférase I: à propos d´un cas inhabituel

open access: yesThe Pan African Medical Journal, 2020
Les déficits en carnitine palmitoyltransférase (CPT) sont des atteintes rares dues à un défaut d´oxydation des acides gras. Patient de 10 ans sans antécédant présenteune dyspnée aigue associée à une toux productive dans un contexte fébrile et d ...
Imane Fetoui   +4 more
doaj   +1 more source

Floral Scent Variation in Cyrtorchis letouzeyi (Orchidaceae) Between Natural Versus Cultivated Environments

open access: yesBiotropica, Volume 57, Issue 3, May 2025.
Shade houses serve as effective scientific tools for ex situ cultivation and orchid conservation in tropical forests. A comparison of the floral scent chemistry of Cyrtorchis letouzeyi between shade houses and natural populations in Cameroon revealed the same dominant compound, identical qualitative compositions across sites, but variations in emission
Kamga Lydie Messado   +4 more
wiley   +1 more source

Cosmetic emulsions containing innovative complex coacervates: A cross‐sectional study

open access: yesInternational Journal of Cosmetic Science, Volume 47, Issue 2, Page 383-397, April 2025.
This study demonstrates the successful encapsulation of α‐tocopherol using non‐animal biopolymers, improving its stability and functional properties in cosmetic emulsions. The developed microcapsules enhance product texture and rheological behaviour, offering promising potential for more stable and functional skincare formulations.
Delaporte Adeline   +2 more
wiley   +1 more source

Influence of particle parameters on deposition onto healthy and damaged human hair

open access: yesInternational Journal of Cosmetic Science, Volume 47, Issue 1, Page 58-72, February 2025.
This study utilized streaming potential to explore particle affinity to hair, considering factors, such as zeta potential, size, and hydrophobicity. Smaller particles deposited better than bigger particles. Neutrally charged particles were found to deposit best on both healthy and damaged hair while positively charged particles deposited the fastest at
Huijun Phoebe Tham   +10 more
wiley   +1 more source

INHIBITION DE L’OXYDATION DE L’HUILE DE TOURNESOL PRODUITE EN ALGERIE PAR LES PRODUITS DE MAILLARD

open access: yesRevue Nature et Technologie, 2022
Depuis sa mise en évidence, la réaction de Maillard a été utilisée depuis de très nombreuses années pour produire des aliments qui paraissent attractifs pour les consommateurs ; elle peut conduire à la formation de couleur, favoriser la formation de ...
Samira MEZIANI   +5 more
doaj   +4 more sources

Thin films produced on 5052 aluminum alloy by plasma electrolytic oxydation with Red Mud-containing Electrolytes [PDF]

open access: yesMaterials Research, 2014
In this paper, we propose the production of ceramic protective thin films by plasma electrolytic oxidation using red mud-containing electrolytes. The treatments were performed through the application of pulsed voltage (600 V, 200 Hz) during 300 seconds ...
Lívia Sottovia   +4 more
doaj   +1 more source

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