In the methanogenic archaeon Methanosarcina barkeri Fusaro, the N5-methyl-tetrahydrosarcinapterin (CH3-H4SPT):coenzyme M (CoM) methyltransferase, encoded by the mtr operon, catalyzes the energy-conserving (sodium-pumping) methyl transfer from CH3-H4SPT to CoM during growth on H2/CO2 or acetate. However, in the disproportionation of C-1 compounds, such as methanol, to methane and carbon dioxide,...

cadmium sulfide nanoparticles were grown using wet chemical method by dissolving the reactants ofcadmium acetate and sodium sulfide in the presence of thioglycerol (tg) as capping agent in ethanolsolvent. different nanoparticle sizes and size distribution were obtained through varying the molaritiesof thioglycerol. at higher tg concentration, synthesis provides a nearly monodisperse nanoparticl...

nanocrystalline zno particles were prepared by a novel sonochemical route from zinc acetate and sodium hydroxide without any requirement of calcination steps at high temperature and without surfactants. variations in several parameters and their effects on the structural (crystal size and morphology) properties of nanoparticles were investigated. characterizations were carried out by x-ray diff...

4,4'-(1,4-naphthalenediyl)bisbenzamine (8). To a solution of 188 mg (0.657 mmol) of 1,4dibromonaphthalene in 10 mL of toluene was added 120 mg (0.104 mmol) of tetrakis(triphenylphosphine) palladium and the mixture was stirred at room temperature for 30 min. To the solution was added 1.3 mL (2M, 2.6 mmol) of aqueous sodium carbonate followed by 288 mg (1.31 mmol) of 4-(4,4,5,5-tetramethyl-1,3,2-...

Studies have been carried out to determine the maximal solubilization of cholesteryl oleate and tocopheryl acetate within mixed bile salt-fatty acid micelles and to establish reproducible assays for pancreatic esterase activity using these micellar substrates. At pH 8.5, using 30 mM sodium taurocholate and 10 mM oleic acid, reproducible micellar solutions of the esters could be prepared giving ...

1. Papillary osmolality and sodium and potassium concentrations were determined in rats during a control period and during escape from the sodium-retaining effect of deoxycorticosterone acetate and compared with the changes observed after acute frusemide injection. 2. During escape, papillary osmolality [554 +/- 36 vs 754 +/- 42 mmol/kg of papillary water (H2O), P less than 0.005] and papillary...

The hypertension which can be induced experimentally in rats by the administration of desoxycorticosterone acetate (DCA) differs from that which develops in rats given cortisone acetate in its dependence upon a liberal sodium intake (1). Not only is DCA-hypertension made more severe by providing the animals with excess sodium (2), but it fails to develop if the available supply of this cation b...