Abundances of heavy metals and lead isotopic ratios in subluminous B stars Abstract. We present a detailed abundance analysis of high-resolution ultraviolet echelle spectra of five subdwarf B stars obtained with HST-STIS The goal of our observations was to test the hypothesis that pulsations in sdBs are correlated to the surface abundances of iron-group elements. We study two pulsators and thre...

Fischer-Tropsch synthesis provides an important opportunity for utilization of biomass and plastic waste. Iron catalysts are the choice light olefin using reaction. In this paper, we investigate strong promoting effects antimony tin on catalytic performance silica supported iron a combination advanced in-situ techniques. The catalyst doping with these elements added via impregnation results in ...

The Tin based herbal drug (Vangaparpam a Siddha system of Medicine) has been widely used for the treatment of urinogenital infection and Arthritis. It was prepared by ten sequential stages of calcinations of the medicinally purified tin along with Aloe vera extract. In this study we analysed samples from various stages of preparation using analytical techniques viz., Fourier Transformed Infrare...

The open-shell cationic stannylene-iron(0) complex 4 (4=[PhiPDippSn⋅Fe⋅IPr]+; PhiPDipp={[Ph2PCH2Si(iPr)2](Dipp)N}; Dipp=2,6-iPr2C6H3; IPr=[(Dipp)NC(H)]2C:) cooperatively and reversibly cleaves dihydrogen at the Sn−Fe interface under mild conditions (1.5 bar, 298 K), in forming bridging hydrido-complex 6. One-electron oreduction of related GeII−Fe0 3 leads to oxidative addition one C−P linkage P...

This paper studies the influence of different substrate materials on phase composition, microstructure, microhardness, and wear resistance Ni-Cr-B-Si-C-Ti-Al plasma spray coatings. Two types metals were studied – AISI 1045 steel Pig-P3 Si grey cast iron. It has been found that in as-coated condition surface layers have a composition γ-Ni, Cr23C6, γ-TiAl, TiN, α-Ti(N, O) substrate, α-Ti, Ni3B, C...

(1) The photo-induced solubility and positive-tone direct photo-patterning of iron, copper and lanthanides chelated with 4-(2-nitrobenzyloxycarbonyl)catechol (NBOC) or 4-(6-nitroveratryloxycarbonyl)catechol (NVOC) was investigated. Photo-patterning of iron, copper, cerium, samarium, europium, terbium, dysprosium, holmium, erbium and lutetium complexes was accomplished. Continuous films were for...