NOPR Collection:

Synthesis of 8-triazinylamino coumarin derivatives and their fluorescent properties

Thu, 01 Sep 1994 00:00:00 GMT

Title: Synthesis of 8-triazinylamino coumarin derivatives and their fluorescent properties Authors: Modi, B R; Vashi, D M; Desai, K R Abstract: 8-(4-Amino-6-arylthioureido-s-triazin- 2-yl-amino)-7- hydroxy-4-methyl coumarin derivatives have been synthesized by the condensation of 8-amino-7- hydroxy-4-methyl coumarin. Their spectral properties are evaluated, Moreover, these compounds are applied on polyester fibres and their dyeing properties have also been studied. Page(s): 317-318

Viscosities and partial molar volumes of [(CH₃)₄N]₂·HgCl₄ in dioxane-water mixtures

Thu, 01 Sep 1994 00:00:00 GMT

Title: Viscosities and partial molar volumes of [(CH₃)₄N]₂·HgCl₄ in dioxane-water mixtures Authors: Kapadi, U R; Chavan, S K Abstract: The viscosities and partial molar volumes of bis- (tetra methyl ammonium) mercuric tetra chloride in dioxane-water mixtures of various compositions in the temperature range 298-318 K have been measured. The experimental results of viscometry have been analyzed using the Jones-Dole equation. Impact of solute on viscosity is studied in terms of Gruenberg-Nissan parameter (d'). Mechanism of viscous flow has been studied in the light of activation parameters. Apparent molar volumes (φ_V) of this electrolyte at different concentrations have been estimated using Masson's equation. Page(s): 314-316

Electrodeposition of basic compound of dysprosium from aqueous baths

Thu, 01 Sep 1994 00:00:00 GMT

Title: Electrodeposition of basic compound of dysprosium from aqueous baths Authors: Kumbhar, P P; Lokhande, C D Abstract: Electrodeposition of basic compound of dysprosium from aqueous acidic baths has been carried out onto stainless steel, copper, brass, titanium and Indium-Tin Oxide (ITO) coated glass substrates. Oxalic acid is found to be a suitable complexing agent and the deposition potentials are found to be dependent on the nature of the substrate and complexing agent. Yellowish gray colored films of the thickness up to 0.25 microns have been deposited. Some of the preparative parameters are optimized. Page(s): 311-313

Bioprecipitation of some toxic metal ions by sewage bacteria

Thu, 01 Sep 1994 00:00:00 GMT

Title: Bioprecipitation of some toxic metal ions by sewage bacteria Authors: Shukla, Namrata; Pandey, G S Abstract: The presence of sulphate-reducing bacteria (Desulfoibrio desulfuricans ) in the domestic sewage sludge has been experimentally confirmed. The bacterial count is found to be 7.5 x 106/g sewage sludge. Treatment of solutions of Pb (II), Cu (II), Ce (IV),Mn (II), Hg (II), Ni(II), Co(II) and Zn (II), each containing 500 mg of the cations in 250 mL solution with 10g of the sewage sludge in presence of 1 g sulphur powder and 1g glucose as nutrient, indicates the extent of bioprecipitation of the metal ions in the order: Pb(II) > Cu(II) = Ce(IV) > Mn(II) > Hg(II) > Ni(II) > Co(II) > Zn(II). The effect of experimental conditions and extraneously added materials on the rates of bioprecipitation has also been studied. Page(s): 308-310

NOPR Collection:

Synthesis of 8-triazinylamino coumarin derivatives and their fluorescent properties

Viscosities and partial molar volumes of [(CH3)4N]2·HgCl4 in dioxane-water mixtures

Electrodeposition of basic compound of dysprosium from aqueous baths

Bioprecipitation of some toxic metal ions by sewage bacteria

Viscosities and partial molar volumes of [(CH₃)₄N]₂·HgCl₄ in dioxane-water mixtures