[en] This work falls under a research program. The aim was to synthesize new organic phosphorylated compounds having an interesting radio pharmacological activity without toxicity. That is why, we carried out the synthesis of new benzothiazole and thiadiazole N-substituted derivatives as thiols, amino thiols, acids thio-sulfonic and phosphoro thioates. All these compounds were characterized by NMR (proton, carbon, phosphorus, 2D), by mass spectrometry, elementary analyzes and for some of them by diffraction of x-rays. The activity of the majority of them was evaluated by in vitro tests. The experimental results were confirmed by theoretical study: the aim of D.F.T. calculation was the study of the mechanism of capture of the free radicals by our compounds. In addition, a study of relation structure activity (Q.S.A.R.) was carried out. Our results allow us to create a model making it possible to establish structure-activity relationship. (author)

[en] This paper presents the realization of the first advanced reactor of the 1400/1500MWe series. The technical characteristics of this type of boiler are first given; then the Franco-Belgian collaboration is recalled and the conditions of realization presented

No abstract available

[en] The model of the French advanced steam generator N4 is to be installed initially on the Chooz site. With a capacity approaching 1500 MW (electrical) it is a development of the current 1300 MW unit series and promises significant improvements, for example, better controllability, a steam generator with an economizer, efficient primary pumps and an advanced fuel. For operational planning which envisages commissioning in the first half of 1991, there is only little flexibility, since the project constitutes the start of a construction series. Current construction progress is good and manufacture proceeds in accordance with French regulations. (orig.)

No abstract available