The mechanism of activated nucleophilic substitution in the aromatic series (S. N. A.*) can be integrated in the general scheme of S. N. synchronous mechanisms. The relative order of mobilities of the halogens in S. N. A. * type reactions, wich varies with the nucleophilic activity of ...
The aim of this dissertation is the analysis of a French manuscript of the Légende Dorée, written at the end of the 13th century by the Dominican Jacques de Voragine and translated into French before 1348 by Jean de Vignay. This manuscript is number 266 in the Bibliothèque Municipale of ...
Revue de Stomatologie et de Chirurgie Maxillo-facialeBeogo R, Andonaba JB, Bouletreau P, Traore Sawadogo H, Traore A. Xeroderma pigmentosum revele par des carcinomes epidermoides multiples de la face chez un enfant. Rev Stomatol Chir Maxillofac 2012;113:50-2....
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Les problèmes fondamentaux de la géodésie et les solutions qui y ont été apportées grâce à l'observation des satellites artificiels的书评 ··· ( 全部0 条 ) 论坛 ··· 在这本书的论坛里发言 + 加入购书单 ...
En este trabajo se realiza una revisión de las contribuciones realizadas en el ámbito de la psicología social al estudio de la satisfacción de los usuarios y consumidores. En concreto, se constata que la investigación se ha realizado predominantemente desde acercamientos cognitivos (confirmaci...
– Introduction of a methyl group in position 4 (angular position) has a deshielding effect on the proton located on carbon 5 (opposite angular position). – The main results are summarized in table I and figure 1.Martin, R. H.Université Libre de Bruxelles, Service de Chimie Organique, ...
Thus, we propose a load sharing method, a splitting technics adapted for the size of search contexts and a function to evaluate the divisibility of a task. We apply and specialize our algorithms in solving the problem of cutting plan, i. E. Position asignement for random pieces on a ...
(International Criminal Tribunals for former Yugoslavia and Rwanda and International Criminal Court) cannot escape the obligation to respect the legality of penalties, even more so as the sole penalty applicable at the international level (imprisonment) threatens a most essential protected legal good: ...
The results obtained as well as the rate constants for neutral or acid catalysed addition always reveal a slight preference for thetrans-isomer (× 2.4). This result agrees with the proposal that preferential equatorial attack of a nucleophile is caused by conformational factors related to a ...