[en] The BILLEAU experimental program studies two dimensional flow of solid spheres in a plant test section. New tests with cold ZrO2 and glass spheres and hot ZrO2 spheres heated up to 2200 K are presented as well as calculations of two cold tests and one hot test with the MC3D multidimensional multiphase thermal-hydraulic premixing code for Fuel Coolant Interaction (FCI) studies. 4 refs., 13 figs., 3 tabs

[en] Action of carbone dioxide on an aqueous suspension of vanadium pentoxyde gives an acid and yellow solution. The study of the composition of the product obtained by evaporation and of the physicochemical properties by methods as thermogravimetry and determination of electronic and IR spectra, allows to assert the existence of a carboxyvanadic derivative

[en] Lactating goats were infused with either technetium-99m (/sup 99m/Tc) or iodine-123 (¹²³I) together with chlorine-36 (³⁶Cl) through an indwelling catheter previously placed in an external pudic mammary artery. The radioisotope infusions were repeated together with 100 mg of sodium perchlorate. There was a rapid transfer of /sup 99m/Tc and ¹²³I into milk, reaching a peak concentration 30 min after a 15-min infusion. The fractional secretion of /sup 99m/Tc and ¹²³I in milk was reduced by 70%-80% and 60%-66%, respectively, by perchlorate. The fractional secretion of ³⁶Cl was not affected by perchlorate, and the shape of the ³⁶Cl secretion curve differed from those of /sup 99m/Tc and ¹²³I, which were similar. It is probable, therefore, that the latter nuclides were secreted by a transport route different from that of chloride. Available data describing the secretion of /sup 99m/Tc in human milk after pertechnetate administration was reviewed, and it was concluded that perchlorate pretreatment significantly reduced the secretion of /sup 99m/Tc in human breast milk

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[en] A new isotopic approach has been developed to study the in vivo release of serotonin (5-HT). 'Encephale isole' cats were implanted with a push-pull cannula in the ventrocaudal part of the head of the caudate nucleus to estimate the release of [³H]5-HT continuously synthesized from L-[³H]tryptophan. Both [³H]5-HT and [³H]tryptamine were found in superfusates. Resting steady state in the release of [³H]indoleamines was observed as soon as 20 min after the beginning of the superfusion with L-[³H]tryptophan; the levels of [³H]5-HT in superfusates were 2.5 times those of [³H]tryptamine and about 6 times the blank value. They were markedly enhanced in the presence of fluoxetine (5 X 10^-6M), a blocker of the 5-HT uptake process. (Auth.)

[en] Short communication

[en] The analysis of some ointments used for the treatment of wounds and burns showed that they were contamined. We proposed β rays for their sterilisation. The induced physicochemical alterations are studied in the case of an ointment containing liposoluble vitamins and essential oils