The topology of the phase diagram four-component mutual system Li,Na,Pb//WO4,SO4 has been analyzed. It is shown that it saturated with formation double compounds, as well triple bonding. Triangulation into stable elements carried out by graph method and main chemical reactions exchange conversion have revealed. internal section Li 2 SO 4 -Na -PbWO was studied differential thermal analysis, coor...

The growth of thin oxide coatings on the aluminum substrate in water-based sodium tungstate electrolyte by plasma electrolytic oxidation (PEO) is discussed and experimentally illustrated. carried out using a distinctive ultra-low duty cycle pulsed direct current (DC) power supply. During PEO processing elements present micro-discharges are identified standard optical emission spectroscopy (OES)...

Background. Two concurrent, childhood leukemia clusters have been identified in the southwestern United States at Fallon, Nevada, and Sierra Vista, Arizona. Additionally, Fallon, Nevada has also experienced concurrent contamination by atmospheric tungsten particles. The etiology of leukemia is not known. Hypothesized risk factors for leukemia are environmental exposure, genetic predisposition, ...

Interferon, interferon inducers, and a variety of other immunomodulators are known to depress the hepatic cytochrome P-450 drug-metabolizing system. Two concepts have been proposed to explain this phenomenon. (a) The steady-state of cytochrome P-450 is altered through decreased synthesis and increased degradation of cytochrome P-450 apoprotein. (b) Interferon induces xanthine oxidase; superoxid...

GdFe 3 (BO ) 4 , single crystals were grown from melt-solutions based on bismuth trimolybdate and lithium tungstate. Single of gadolinium ferroborate lithium-tungstate solution-melt for the first time. The magnetic properties are compared. It is shown that obtained using contains impurities Bi 3+ ions (6% at.), which replace Gd ions. Whereas a tungstate does not seem to contain such uncontrolle...

Of 100 strains of iron-oxidizing bacteria isolated, Thiobacillus ferrooxidans SUG 2-2 was the most resistant to mercury toxicity and could grow in an Fe(2+) medium (pH 2.5) supplemented with 6 microM Hg(2+). In contrast, T. ferrooxidans AP19-3, a mercury-sensitive T. ferrooxidans strain, could not grow with 0.7 microM Hg(2+). When incubated for 3 h in a salt solution (pH 2.5) with 0.7 microM Hg...

The hyperthermophilic archaeon Pyrococcus furiosus expresses five aldehyde oxidoreductase (AOR) enzymes, all containing a tungsto-bispterin cofactor. The growth of this organism is fully dependent on the presence of tungsten in the growth medium. Previous studies have suggested that molybdenum is not incorporated in the active site of these enzymes. Application of the radioisotope (99)Mo in met...