A moderately thermophilic, anaerobic bacterium (strain SB91^T) was isolated from a freshwater hot spring at Barguzin Valley, Buryatiya, Russia. Cells of strain SB91^Twere straight to slightly curved rods, 0·5–0·6 μm in diameter and 3·0–7·0 μm in length. Formation of endospores was not observed. The temperature range for growth was 26–62 °C, with an optimum at 50 °C. The pH range for growth was 5·5–9·5, with an optimum at pH 7·5–8·0. The substrates utilized by strain SB91^Tin the presence of 9,10-anthraquinone 2,6-disulfonate included peptone, tryptone, Casamino acids, yeast extract, beef extract, casein hydrolysate, alanine plus glycine, alanine plus proline,l-valine and n-propanol. Carbohydrates were not utilized. Strain SB91^Treduced amorphous Fe(III) oxide, Fe(III) citrate, Fe(III) EDTA or Fe(III) nitrilotriacetate with peptone,l-valine or n-propanol as an electron donor. Strain SB91^Treduced 9,10-anthraquinone 2,6-disulfonate, thiosulfate, elemental sulfur, fumarate and selenite. Strain SB91^Tsurvived after exposure to gamma-radiation at a dose of 5·4 kGy. The G+C content of the DNA of strain SB91^Twas 33 mol%. Analysis of the 16S rRNA gene sequence revealed that the isolated organism belonged to cluster XII of the clostridia. On the basis of its physiological properties and the results of phylogenetic analyses, it is proposed that strain SB91^Trepresents the sole species of a novel genus,Tepidimicrobium; the nameTepidimicrobium ferriphilumgen. nov., sp. nov. is proposed, with strain SB91^T(=DSM 16624^T=VKM B-2348^T) as the type strain.

A simple understanding on the trend of stability for transition metal carbides.

The review is devoted to overview of the current status on some radiochemical studies and their technological applications in Russian Federation. Multiple view on the problem is given including achievements of recent years in this field. The collected data reflect importance of studies connected with spent nuclear fuel and explain how complicated is this problem.

The speciation of Tc(VII) was studied in 12 M H₂SO₄ by NMR, UV-visible and XAFS spectroscopy. Experimental results and density functional calculations show the formation of TcO₃(OH)(H₂O)₂.

Receptors bearing hydrogen and halogen bond donors for recognition of perrhenate and pertechnetate were designed and studied. Acyclic hosts with N–H and C–H binding sites showed the best selectivity for TcO₄ ⁻ and ReO₄ ⁻ over spherical and more basic tetrahedral anions.