Results 1 to 10 of about 2,156 (43)

Huiles essentielles et chiralité moléculaire [PDF]

open access: yesComptes Rendus. Chimie, 2021
Molecular chirality is a property of the nature and life, it is present everywhere and at all scales of magnitude. A fundamental aspect of molecules that is generally overlooked in scientific aromatherapy yet based on the use of the chemistry of ...
Aribi-Zouioueche, Louisa   +1 more
doaj   +5 more sources

Pasteur : sous le savant l’artiste [PDF]

open access: yesComptes Rendus. Chimie, 2022
As a school boy, Pasteur tried his hand at pastel and lithography with real talent. This largely ignored trait of the scientist did not propel him into an artistic career but certainly helped to develop gifts for observation and precision, which the ...
Perrot, Annick
doaj   +3 more sources

Chiralité et médicaments: Une très importante découverte scientifique européenne

open access: yesDebater a Europa, 2016
Les travaux de Malus, de Biot, de Mitscherlich, puis de Louis Pasteur conduisirent à la découverte de la dissymétrie moléculaire, qui fut ensuite nommée chiralité par Lord Kelvin. L’importance de la chiralité pour l’activité thérapeutique des médicaments
Olivier Lafont
doaj   +1 more source

Le limonène dans les huiles essentielles  : énantiomères et activités biologiques

open access: yesComptes Rendus. Chimie
Literature data are used to identify the enantiomeric diversity of limonene in 54 essential oils composed of between 0.3–99.7% of this molecule. Significant enantiomeric excesses are observed, either in (R)-(+)-, or in (S)-(–)-limonene, and more rarely ...
Aribi-Zouioueche, Louisa
doaj   +1 more source

Sur la sémiosphère

open access: yesCygne Noir
Cet article, d’abord publié en russe en 1984, introduit le concept de sémiosphère et décrit ses principaux attributs. Si Lotman parle de sémiose, en revanche, il n’emploie pas le concept de signe, lui préférant les notions de texte, de message, de ...
Juri Lotman
doaj   +1 more source

Straightforward access to mono- and bis-cycloplatinated helicenes that display circularly polarized phosphorescence using crystallization resolution methods. [PDF]

open access: yesChem Sci, 2014
Shen C   +12 more
europepmc   +1 more source

Le temps en fhysique Quatique Relativiste [PDF]

open access: yes, 1989
No disponibleThe paradigma of a period of time “deployed in the act” and intrinsically symmetrical (theoretical reversibility of the relation of cause and effect) is not necessarily linked to deterministic metaphysics, as it can be expressed in terms ...
Costa de Beauregard, O.
core   +6 more sources

Rhenium complexes bearing phosphole-pyridine chelates: simple molecules with large chiroptical properties. [PDF]

open access: yes, 2012
International audienceThe synthesis and chiroptical properties of chiral rhenium complexes bearing mono- or di-topic phosphole ligands are described. [on SciFinder(R)
Boucekkine, Abdou   +10 more
core   +2 more sources

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