Ce dernier, traité par l'acide sulfurique dilué, régénère la méthoxyacétylacétone qu'on extrait à l'éther. Après élimination de l'éther, on distille le résidu sous pression réduite (température d'ébullition: 68-69° sous 14 mm). La méthoxyacétylacétone présente, en général...
The activation energy is found to be of the order of 15 kcal/m. Above 400 °C, the reaction becomes more and more homogeneous and may be explained by a free radical mechanism, although no free radicals could be detected directly. The overall activation energy is of the order of 60 to ...
Les deux premières éditions du Paradoxe de la précocité intellectuelle furent assurées par le CRDP de Haute Normandie. La troisième édition fut torpillée par le Scéren-CNDP puis coulée
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α-tert-Alkylketones are produced by the hydrolysis of these imines. This reaction, involving radical anion intermediates, is a simple method for the synthesis of highly hindered symmetric ketones.Jean-Paul Mazaleyratcanadian journal of chemistry...
It is based on three important sites, which are the Vallonnet cave ((Roquebrune-Cap-Martin, Alpes-Maritimes, France), Isernia La Pineta (Molise, Italy) and the Caune de l'Arago (Tautavel, Pyrénées-Orientales, France), and on se...
The observation of a relation between the electrochemical reduction potential of these ketones and their rate of hydrogenation suggests a transfer of hydrogen to the ketone by a hydride ion intermediate. [Journal translation]D. BeaupereP. BauerR. Uzancanadian journal of chemistry...
Carine ROBERTChristine CHOMIENNETHOMASRéf
Urinary incontinenceInVance™Complete prostatectomyThe surgical treatment of effort-induced urinary incontinence in males by perineal urethra compression is a concept that has been described in the 1960s; its basic principle, the correction of incontinence episodes in the sitting position, has been ...
The thermal and mechanical properties of final materials were studied in order to determine the influence of microstructure on their properties.Alain RonzanoBibliogr