Tungsten accumulation

Hale, K.L. et al., Anthocyanins facilitate tungsten accumulation in Brassica, Physiol. Plant., 116, 351, 2002. 

Reproductive Toxicity. At a dose range without toxic effects to the maternal oiganism, the following influences could be observed Increase in embryo lethality decrease in ossification of bones tungsten accumulation in the fetus no significant retention in die placenta. 

Tungsten accumulates biologically on the leaves of Rohinia and in Chlordla (Wennig and Kirsch 1988). The individual animal intake from food is estimated to be up to 13.0 xg per day (Wester 1974). 

Wagner R, JR Andressen (1987) Accumulation and incorporation of W-tungsten into proteins of Clostridium acidiurici and Clostridium cylindrosporum. Arch Microbiol 147 295-299. 

Catalysts used for hydrodesulfurization (HDS) and hydrodenitrogenation (HDN) of heavy oil fractions are largely based on alumina-supported molybdenum or tungsten to which cobalt or nickel is added as a promoter [11]. As the catalysts are active in the sulfided state, activation is carried out by treating the oxidic catalyst precursor in a mixture of H2S and H2 (or by exposing the catalyst to the sulfur-containing feed). The function of hydrogen is to prevent the decomposition of the relatively unstable H2S to elemental sulfur, which would otherwise accumulate on the surface of the... 

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