37 results about "Tellurous acid" patented technology

The preparation process of cow mammitis staphylococcus culture fluid and its use belongs to the field of animal epidemic disease diagnosing, preventing and treating technology. The preparation process includes dissolving peptone 10 g, yeast powder 5 g, sodium pyruvate 10 g, glycin 12 g and lithium chloride 5 g in water of 980 ml; regulating pH to 7.3 with sodium hydroxide; sterilizing at 121 deg.c; cooling to 50+ / -10 deg.c; adding bacteria-free 1% concentration potassium tellurite water solution in 10 ml and Tween-80 in 7 ml, and preservation at 4 deg. c. The culture fluid may be used in the fast identification of cow mammitis staphylococcus and antibiotic sensitivity test.

The invention discloses a method for building suicidal plasmids and drug-resistant mutant strains based on mariner transposons. The building of the suicidal plasmids comprises the following steps of performing PCR amplification by using pCat-marinerr plasmids as templates; using an obtained amplification product as a plasmid framework; then, amplifying tpm resistant genes by using pUC57-tpm plasmids as templates; then, performing homologous recombination on the plasmid framework and the tpm resistant genes to obtain the suicidal plasmids. The drug-resistant mutant strains are obtained by converting the suicidal plasmids into bacillus coli WM3064 competent cells; then, performing mixed culture on obtained strains and target strains; next, performing screening by using a single drug plate containing tellurite and a double drug plate containing tellurite and original resistance screening labelling drugs. The method has the advantages that the operation is simple; a transposon mutant strain can be obtained at high flux; the method is applicable to the building of drug-resistant strains or screening drugs.

The invention relates to a bismuth base (bismuth selenide, bismuth telluride) hydrogen storage material and a preparation method thereof, relating to low temperature liquid phase synthesis of bismuth base material and the application thereof on hydrogen storage, lithium storage and electrode material. The invention is characterized in that water is taken as solvent, bismuth salts such as bismuth nitrate, bismuth chloride and the like as a bismuth source, and water-soluble tellurium (selenium) acid salts (such as sodium tellurite, selenium substituted sodium sulfate, sodium selenite) or tellurium (selenium) acids (such as orthotelluric acid, tellurous acid and selenous acid) as a tellurium source (selenium) source; proper coordination agents (such as nitrilotriacetic acid, hexamethylene diamine tetraacethyl and the like) and reducing agents (such as vitamin C, sodium borohydride and the like) are added for liquid phase reaction synthesis at the low temperature of 60-80 DEG C. The bismuth selenide crystal grains prepared by the invention take on flower shapes with the sphere diameter of 1-6mum, and the bismuth telluride crystal grains take on sheet shapes with nanometer diameter; the hydrogen storage performance reaches over 100mAh.g<-1>. The method has the advantages of cheap raw material, simple technique, convenient operation, easy mass production, etc.