Vitamin B12, Cobyric Acid, Fe(III)Cobalamin, Fe(III)Cobyric Acid, Iron-B12-Analogues, UV/VIS-, NMR-, ESR-Spectra The reaction of hydrogenocobalamin or hydrogenocobyric acid (both isolated from Chromatium vinosum) with iron(III) acetate and iron powder in acetic acid under N 2 at 80 °C leads to the incorporation of iron into these cobalt-free corrinoids. The products, Fe(III)cobalamin and Fe(ni)...

A procedure for the efficient extraction and separation of rare earths and other valuable elements from used NdFeB permanent magnets is presented. In a first step, an iron free leachate is prepared from an used magnet using nitric acid. Cobalt is separated through a liquid–liquid extraction in aqueous nitrate media using as organic phase the ionic liquid trihexyl(tetradecyl)phosphonium nitrate ...

Histochemical methods have been devised Lo demonstrate certain metabolic activities of cells. By these techniques certain structures in a particular tissue are made to stand out in contrast to the other constituents. We have applied the methods for demonstrating alkaline and acid phosphatase activity to the study of the skin in leprosy. Pearse (5) has pointed out that these methods depend on in...

To determine how a substitutionally inert metal can play a catalytic role in the metalloenzyme nitrile hydratase (NHase), a reactive five-coordinate Co(III) thiolate complex ([Co(III)(S(2)(Me2)N(3)(Pr,Pr))](PF(6)) (1)) that resembles the active site of cobalt containing nitrile hydratase (Co NHase) was prepared. This was screened for reactivity, by using low-temperature electronic absorption sp...

A nitrate-dependent Fe(II)-oxidizing bacterium was isolated and used to evaluate whether Fe(II) chemical form or oxidation rate had an effect on the mineralogy of biogenic Fe(III) (hydr)oxides resulting from nitrate-dependent Fe(II) oxidation. The isolate (designated FW33AN) had 99% 16S rRNA sequence similarity to Klebsiella oxytoca. FW33AN produced Fe(III) (hydr)oxides by oxidation of soluble ...