Star-shaped dendritic PbS nanocrystals have been synthesized by the reaction of lead acetate and thioacetamide in the presence of CTAB through a hydrothermal process at 80 ℃ for 5 h. XRD, TEM, SAED, SEM were used to characterize the products.
The results show that the optimum efficiency of the electro-generation of the leaching system can be obtained when taking PbS as the electrode, in which sulfur (wt3%) as a binder and acetylene black (wt6%) as the conducting reagent, are mixed and compressed under 20 MPa pressure for making electrode slice.
In the experiment of the reducing-matting smelting of lead sulfide concentrates the influence of the technics conditions such as smelting time and temperature, the addition of pyrite cinder and additive on the reducing-matting smelting is notable.
The fluorescein film of lead oxide and the photocon film of lead sulphide,with thearea of 4×15 mm~2 and with the thickness of 0.33μm and 0.18μm respectively,were manufacturedby means of laser chemical vapour deposition(LCVD) for the first report.
According to the thermodynamic zones on E-pH diagarm of PbS-H 2O system,when E values are controoled in the range of -0.15 to 0.25 and pH value is 2 to 7,the lead sulphide precipitate is obstained without formation of PbSO 4 and PbO·SO 4.The product lead sulphide is identified and proved by X-ray diffraction.
5. After watery grinding on sediment containing the lead from the acided copper and cadmium sediment ,over 30 percent of sulfuric lead can be floated out ,and the recover}' of lead can surpass 96 percent.
The phase-transfer of oleic acid-stabilized CdSe nanocrystals into PBS buffer solutions was also studied for their potentials in biological applications.
Degradation of p-Toluenesulfonate by Immobilized Comamonas testosteroni BS1310 (pBS1010) Cells
Parameters of degradation of p-toluenesulfonate (TS) by free and agar-embedded Comamonas testosteroni BS1310 (pBS1010) cells were determined.
We studied the specific growth rate, duration of the lag phase, stability of plasmids, and activities of the key enzymes involved in naphthalene biodegradation in rhizosphere pseudomonades carrying the structurally similar plasmids pOV17 and pBS216.
The structural rearrangements in the plasmid pBS216 could "switch off" the genes of the catechol oxidation meta-pathway.
Fluorophosphate Glasses with Quantum Dots Based on Lead Sulfide
The kinetics of formation of nanostructured glass-ceramic materials based on silicate glass doped with lead sulfide PbS is investigated using small-angle X-ray scattering and X-ray powder diffraction.
The inference is made that this effect is possibly caused by the reaction PbS + Na2O = PbO + Na2S, which should bring about a decrease in the lead sulfide concentration in the matrix and the dissolution of precipitated nanocrystals.
Morphology of silicate glasses with lead sulfide nanocrystals
The specific features in the structure of nanostructured glass-ceramic materials based on sodium zinc silicate glasses doped with lead sulfide are investigated using small-angle X-ray scattering and X-ray powder diffraction.