37 results about "Tellurous acid" patented technology

The invention discloses a complex enrichment medium used for salmonella, listeria monocytogenes and staphylococcus aureus and a method for preparing the same. The complex enrichment medium comprises the following components in weight portion: 15 to 19 portions of tryptone, 2 to 4 portions of peptone, 2 to 3 portions of sodium dihydrogen phosphate, 2 to 3 portions of glucose, 0.5 to 1.5 portions of aesculin, 1, 000 portions of distilled water, 1 to 2.5 portions of sodium pyruvate, 3 to 10.0 portions of mannitol, 1.0 to 25.0 portions of sodium chloride, 1 to 2.5 portions of lithium chloride, 0.0001 to 0.0002 portion of potassium tellurite, and 0.005-0.015 portion of nalidixic acid, wherein the pH value is between 7.1 and 7.5. The complex enrichment medium can inhibit the growth of other pathogenic microorganisms while performing enrichment on three target pathogens, thus the complex enrichment medium can be directly applied to the isolation culture and the biological assay test of target bacteria, and can also be directly applied to a detection technology of a plurality of pathogens based on one detection platform for multiple PCR and the like to make a diagnostic report.

The invention belongs to the field of secondary batteries, in particular to an aqueous secondary battery based on zinc-tellurium. An aqueous secondary battery, the positive electrode contains tellurium; the negative electrode contains zinc; and an aqueous electrolyte and a separator are arranged between the positive electrode and the negative electrode. The invention is mainly based on the redox reaction of elemental tellurium and tetravalent tellurium compounds (tellurium dioxide or tellurite) in the aqueous electrolyte in the positive electrode and the dissolution (oxidation) / deposition (reduction) reaction of zinc ions in the negative electrode for energy storage Therefore, the aqueous zinc-tellurium secondary battery of the present invention has the advantages of high capacity, long cycle life, safety and environmental protection, etc., and can be widely used in consumer electronic equipment, intelligent devices, electric vehicles, communications, aerospace and large-scale energy storage, etc. important areas.

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.

A device for reducing radionuclide emission in extreme accidents of nuclear power plants comprises an adsorption tank, three water tanks, three electromagnetic valves, three float valves and a remote controller. The adsorption tank is filled with a high-temperature-resistant inorganic adsorption material is preset in a containment sump, the three water tanks filled with different solutions are preset in a containment, and the remote controller is mounted outside the containment of the nuclear power plant. The solution in the first water tank comprises, by weight, 0.5%-5% of strontium ions, 0.1%-2% of iodide ions, 0.1%-2% of tellurous acid radicals and the balance water or comprises, by weight, 0.5%-5% of strontium ions, 0.1%-2% of iodide ions, 0.1%-2% of tellurous acid radicals, 1%-4% of boric acid and the balance water. The solution in the second water tank comprises, by weight, 0.1%-4% of silver ions and the balance water or comprises, by weight, 0.1%-4% of silver ions, 1%-4% of boric acid and the balance water. The solution in the third water tank comprises, by weight, 0.5%-5% of sulfate radicals and the balance water or comprises, by weight, 0.5%-5% of sulfate radicals, 1%-4% of boric acid and the balance water.

The invention discloses a method for controlling the content of tellurium dioxide, the content of anhydrous tellurite and the content of trihydrate tellurite in a tellurite product. The method comprises the following steps that firstly, alkali metal hydroxide and tellurium dioxide are reacted in an aqueous solution with the mole ratio of 2.00:(1.00-1.15) to obtain a tellurite solution; secondly, alkali metal hydroxide is added in the tellurite solution, wherein the adding amount of alkali metal hydroxide accounts for X of alkali metal hydroxide in the first step by weight, different numerical value ranges are selected from X to control the content of tellurium dioxide, the content of anhydrous tellurite and the content of trihydrate tellurite in the tellurite product, and X is larger than zero and smaller than or equal to 8.00%. By means of the method, high-purity potassium tellurite can be prepared, and high-purity needle-like trihydrate potassium tellurite can also be prepared in an industrialized mode.

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.