Exposure of weanling rats to a diet containing the element tellurium results in specific inhibition of squalene epoxidase, an obligate enzyme in cholesterol biosynthesis. Liver responds to the resulting intracellular sterol deficit by up-regulating, in parallel and to the same extent, expression of mRNA for squalene epoxidase and for HMG-CoA reductase, the major rate-limiting enzyme in the path...

When the former method is employed for production, enriched uranium irradiated for 2-3 weeks in the nuclear reactor is dissoivoc! in nitric acid and the iodine-131 is distilled and collected. '*) But separation of iodine-1 31 from pile irradiated tellurium targets is the most commonly used method of production. The methods <d Reparation varies for different targets. With metal tellurium the tar...

IV-VI semiconductor quaternary alloys lattice matched with BaF2 substrates have been grown by liquid phase ,epitaxy. X-ray diffraction analysis shows that liquid (Pbl-,~Sn,L)0.99(Sel--YLTe~L)0.01 solutions produce Pbt -+Sn,,Ser -rsTey, alloys lattice matched with the substrate when yL=60%, SS%, and 57%, and x,=20%, 40%, and 60%, respectively. These data, which can be used to fabricate lattice-m...

A new tellurium-substituted Lindqvist-type polyoxoniobate [H2TeNb5O19](5-) was synthesized as a tetramethylammonium salt. When irradiated with a Xe lamp, a water-methanol solution of this cluster showed exceptionally high H2-evolution activity suggesting cocatalysis by the hexaniobate cluster and metallic tellurium, both of which are formed as photodecomposition products.

In order to discuss the atomization process of an analyte element occurring in a graphite furnace for atomic absorption spectrometry, we measured variations in the characteristic temperature with the progress of an atomization stage, by using a two-line method under the assumption of a Boltzmann distribution. For this purpose, iron was chosen as the analyte element. Also, the atomic absorption ...

Iron (II) disulfide (FeS2) is a semiconductor which belongs to the space group 6 3 h T Pa  . It has a cubic crystal system (primitive cubic). Iron (II) disulfide is used in Lithium metal sulfide batteries, solar photovoltaics, battery recycling and molding compounds. It has a narrow band gap value of 0.95 eV [1]. Tellurium (Te) is classified as metalloid (p-type semiconductor) and belongs to t...