Un gargon de 13 ans fut hospitalise dans le Service de Pediatrie du C.H.U. de Pahlavi de la Faculte de Medicine de Teheran, pour une insuf­fisance cardiaque. Les signes auscultatoires, radiologiques et electriques evoquaient une stenose mitrale. Le malade deceda <lans le tableau d'oedeme pulmonaire aigli, apres quel­ques episodes d'hemiparesies resolutives.  A l'autopsie, il existait un myxcme...

A novel generic method of silica supported catalyst system generation from a fluid state is presented. The technique is based on the combined flow and radiation (such as microwave, thermal or UV) induced co-assembly of the support and catalyst precursors forming nano-reactors, followed by catalyst precursor decomposition. The transformation from the precursor to supported catalyst oxide state c...

The photocatalytic degradation of acridine orange (AO) dye by NaBiO3 photocatalyst under visible light irradiation was investigated systematically. The NaBiO3 photocatalyst exhibited a higher photocatalytic activity compared to the P25 photocatalyst. After 160 min of photocatalytic reaction, the degradation rate of AO could reach to 99% in appropriate conditions. Factors, such as catalyst dosag...

Intercalation of oxygen at the interface of graphene grown by chemical vapour deposition and its polycrystalline copper catalyst can have a strong impact on the electronic, chemical and structural properties of both the graphene and the Cu. This can affect the oxidation resistance of the metal as well as subsequent graphene transfer. Here, we show, using near ambient pressure X-ray photoelectro...

SnTe has attracted worldwide interest since its theoretical predication as topological crystalline insulator. Because of promising applications of one-dimensional topological insulator in nanoscale electronics and spintronics device, it is very important to realize the observation of topological surface states in one-dimensional SnTe. In this work, for the first time we successfully synthesized...

"Etude etiologique de la circulation ra.pide iutra-rena-le"  Le but de l'angiographle renale n'est pas '.seu­lement le controle anatomique de l'organe, une etude physiologique (Hemodynamique) doit toujours etre prise en consideration.  Le temps normal de la circulation intra-renale selon les differents auteurs varie entre 6 a 8, 8 a 10 et 10 a 12 secondes, mais le temps moyen est de 6 a 8 seco...

Recent studies of the CO oxidation activity exhibited by highly dispersed nano-gold (Au) catalysts have reached the following conclusions: (a) bilayer structures of Au are critical; (b) a strong interaction between Au and the support leads to wetting and electronrich Au; (c) oxidative environments deactivate Au catalyst by re-oxidizing the support, which causes the Au to de-wet and sinter. Rece...

The essential flavoenzyme Ero1p both creates de novo disulfide bonds and transfers these disulfides to the folding catalyst protein disulfide isomerase (PDI). The recently solved crystal structure of Ero1p, in combination with previous biochemical, genetic and structural data, provides insight into the mechanism by which Ero1p accomplishes these tasks. A comparison of Ero1p with the smaller fla...