36 results about "Tellurous acid" patented technology

The invention relates to a culture medium for simultaneous composite enrichment of five kinds of food-borne pathogenic bacteria, namely Salmonella, Escherichia coli, Staphylococcus aureus, Listeria monocytogenes and Shigella, and a preparation method for the culture medium. Food-borne pathogenic bacteria are a significant reason to cause food positioning, so the rapid and accurate detection of the food-borne pathogenic bacteria has an important practical significance for preventing and controlling food safety incidents. The culture medium is characterized by comprising the following components: 10.0 g of peptone, 10.0 g of sodium chloride, 9.0 g of disodium hydrogen phosphate, 1.5 g of monopotassium phosphate, 0.1 g of cholate, 0.1 mg of potassium tellurite, 1.0 g of lithium chloride, 3.0 g of glucose, 2.0 g of mannitol, 2.5 g of sodium pyruvate, 1.0 g of aesculin and 1,000 mL of distilled water, wherein the pH value is 7.1 to 7.5. The culture medium can simultaneously enrich five kinds of target pathogenic bacteria, can be used for separation and identification of target bacteria, can also be used for the molecular detection of multiple pathogenic bacteria on the same detection platform, provides technical support for a method for rapidly detecting five kinds of pathogenic bacteria in food, and meets the requirement of simultaneous detection of five kinds of food-borne pathogenic bacteria.

The invention relates to a complex enrichment medium used for salmonella, vibrio parahaemolyticus and comma bacillus and a method for preparing the same. The formulation components of the complex enrichment medium in weight portion are as follows: 0.5 to 1.5 portions of buffer peptone water, 1000 portions of distilled water, 1.0 to 5.0 portions of glucose, 1.0 to 5.0 portions of mannitol, 0.03 to 0.06 portion sodium pyruvate, 0.5 to 2.5 portions of anhydrous sodium sulfite, 1.0 to 10.0 portions of sodium citrate, 5.0 to 25.0 portions of sodium chloride, 1 to 5 portions of cholate, and 0.0005 to 0.0025 portion of potassium tellurite. The method comprises the following steps: firstly, adding the buffer peptone water and the like into the distilled water, and sterilizing the mixture after heating and melting; and secondly, cooling the mixture to 50 DEG C, and then adding the potassium tellurite into the mixture to be mixed evenly. The complex enrichment medium can integrate two steps of primary enrichment and selective enrichment of bacterial detection to shorten the enrichment time to 24 hours, can perform enrichment on three target pathogens at the same time, and can inhibit the growth of other microorganisms.

The invention discloses a chromogenic medium used for detecting esherichia coli O157:H7. The medium comprises agar, peptone, beef extract powder, sodium chloride, sorbitol, inositol, neutral red, beta-galactosidase chromogenic substrate, beta-glucuronidase chromogenic substrate, isopropyl-beta-D- thiogalactopyranoside, natrium taurocholicum, potassium tellurite and cefixime. The chromogenic medium used for detecting esherichia coli O157:H7 of the present invention has the advantages of high sensitivity, good specificity, direct bacterial strain discrimination according to colony color, short detection period and strong operationality, is suitable for treating high-reflux samples, is capable of comprehensively, systematically and accurately detecting and preliminarily identifying the esherichia coli O157:H7 in food production and environment, and provides a novel approach for rapidly detecting the microbes.

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 method for producing a plant with increased yield as compared to a corresponding wild type plant whereby the method comprises at least the following step: increasing or generating in a plant or a part thereof one or more activities of a polypeptide selected from the group consisting of 26S proteasome-subunit, 50S ribosomal protein L36, Autophagy-related protein, B0050-protein, Branched-chain amino acid permease, Calmodulin, carbon storage regulator, FK506-binding protein, gamma-glutamyl-gamma-aminobutyrate hydrolase, GM02LC38418-protein, Heat stress transcription factor, Mannan polymerase II complex subunit, mitochondrial precursor of Lon protease homolog, MutS protein homolog, phosphate transporter subunit, Protein EFR3, pyruvate kinase, tellurite resistance protein, Xanthine permease, and YAR047C-protein.

The invention belongs to the field of secondary batteries, and particularly relates to a zinc-tellurium-based aqueous secondary battery. According to the aqueous secondary battery, a positive electrode contains tellurium; a negative electrode contains zinc; and a water system electrolyte and a diaphragm are arranged between the positive electrode and the negative electrode. The aqueous secondary battery is mainly based on an energy storage mechanism of a redox reaction of compounds (tellurium dioxide or tellurous acid) of elementary tellurium and tetravalent tellurium in the aqueous electrolyte at the positive electrode and a dissolution (oxidation)/deposition (reduction) reaction of zinc ions at the negative electrode, so that the aqueous zinc-tellurium secondary battery has the advantages of high capacity, long cycle life, safety, environment-friendliness and the like, and can be widely applied to the important fields of consumer electronic equipment, intelligent devices, electric vehicles, communication, aerospace, scale energy storage and the like.

The invention discloses a preparation method of a thorny magnetic nickel telluride nano wires. The method comprises the following steps: tellurous acid or tellurite is added into an aqueous solution of nickel salt, and stirring is carried out in order to obtain a turbid solution; a hydrazine hydrate solution is added dropwisely into the turbid solution, stirring is carried out till the solution isbrown, and a mixed solution is obtained; a hydrothermal reaction is carried out for the mixed solution, the hydrothermal reaction temperature is 120-160 DEG C, hydrothermal reaction time is 4-10 hours, washing is carried out, and drying is carried out in order to obtain the thorny magnetic nickel telluride nano wires. The invention also discloses the thorny magnetic nickel telluride nano wires. The invention also discloses the thorny magnetic nickel telluride nano wires with functionalized gold nanoparticles. The invention also discloses the preparation method of the thorny magnetic nickel telluride nano wires with functionalized gold nanoparticles. The invention also discloses an application of the thorny magnetic nickel telluride nano wires with functionalized gold nanoparticles.

The invention discloses composite system glass powder which is formed by combining tellurite, borate and silicate and is used for silver paste of an auxiliary gate electrode of a crystalline silicon solar cell. In the temperature rising process of sintering of the auxiliary gate electrode silver paste, the tellurite is firstly melted and spread on the silicon surface, so that the sintering reaction between silicon and silver is blocked; then, borate is melted and penetrates through the antireflection layer on the silicon surface in an etching mode, and a silver-silicon conductive contact window is opened; and finally, melting the silicate to inhibit the erosion of the glass melt to the silicon surface and generate a passivation effect. In the cooling process after sintering, silver dissolved by tellurite and brought to the interface is separated out, and a large number of silver colloid particles are formed. Therefore, the composite system glass powder provided by the invention has the effects and characteristics of increasing effective contact of silver and silicon, reducing contact resistance, passivating a silicon surface and the like, and the application performance of the auxiliary gate electrode silver paste can be remarkably improved.

The invention belongs to the technical field of electro-catalytic ammonia production, and discloses a method of electrocatalysing nitrogen reduction catalyst. The method comprises the following steps:firstly, introducing telluride into electro-catalytic nitrogen reduction by utilizing the hydrogen storage capacity of the telluride, selecting elements with favorable adsorption action on nitrogen,and realizing higher ammonia yield at 0V by virtue of the hydrogen storage property of the telluride, wherein the telluride is prepared from Sb2Te3, Bi3Te4, CoTe and CdTe2; taking Sb2Te3 as an example, the synthesis method of the Sb2Te3 comprises the following steps: SbCl3 is dissolved in water, then 25mg of sodium tartrate, 25mL of ammonia water, 22mg of potassium tellurite and 10mL of hydrazineare sequentially added and stirred for 5min, and the mixture is put into a reaction kettle to react at 180 DEG C for 5h; the nitrogen reduction properties of Sb2Te3, Bi3Te4, CoTe and CdTe are compared, and it is found that telluride has a great prospect in nitrogen reduction under low voltage.

The invention relates to an indium (In)-doping tellurous acid lead (PbTeO3) quantum dot sensitizer for a solar cell and a preparation method of the sensitizer. The method comprises the following step of doping In impurity atoms into PbTeO3 quantum dots to form the sensitizer to assemble the quantum dot sensitized solar cell. Transmission paths of electron holes inside the cell are optimized, so that the electron holes can be more quickly separated and can be more effectively injected into valence bands of NiO, dark current is reduced, and the short-circuit current and the photoelectric conversion efficiency of the solar cell are improved. The method is simple and easy to operate and low in cost, and can be used for large-area manufacturing.

The invention relates to a rubidium molybdenum fluoride tellurite second-order nonlinear optical crystal material and preparation thereof, and application of rubidium molybdenum fluorine tellurite second-order nonlinear optical crystal material in laser frequency conversion. The chemical formula of the crystal material is RbTeMo2O8F; the molecular weight of the crystal material is 551.95; the crystal material belongs to a monoclinic system; the space group of the crystal material is Pn; the cell parameters of the crystal material are that a is equal to 5.55 to 5.73 angstroms, b is equal to 9.18 to 9.30 angstroms,c is equal to 7.44 to 7.57 angstroms, alpha is equal to gamma and equal to 90 degrees, beta is equal to 95.13 to 95.32, and Z is equal to 2; and the cell volume V of the crystal material is equal to 379.1 to 403.4 angstroms<3>.The rubidium molybdenum fluoride tellurite crystal material has excellent optical performance; under irradiation of laser with a wavelength of 1064 nm, the powder frequency doubling strength of the rubidium molybdenum fluoride tellurite crystal material is about 27 times the powder frequency doubling strength of a monopotassium phosphate crystal; and under laser with a wavelength of 2100 nm, the powder frequency doubling strength of the rubidium molybdenum fluoride tellurite crystal material is 2.2 times the powder frequency doubling strength of a potassium titanyl phosphate crystal. In addition, the crystal material has a wide transmission range in a visible light-infrared light region (0.34-5.4 [mu]m), and has wide application prospects in the fields of laser frequency conversion, photoelectric modulation, laser signal holographic storage and the like.

The invention provides an isolation medium for detecting Escherichia coli O157 and a preparation method of the isolation medium. The separation medium for detecting the escherichia coli O157 comprises peptone, rhamnose, inositol, sorbitol, peptone, agar, cholate 3, neutral red, crystal violet, potassium tellurite, cefixime and a [beta]-galactosidase chromogenic substrate. The peptone, the rhamnose, the inositol, the sorbitol and the 5-bromo-4-chloro-3-indole-[beta]-galactoside are added into the separation medium provided by the invention, and the content of each component is optimized, so that not only is the false positive rate reduced, but also the Escherichia coli O157:H7 can be quickly distinguished through the color difference, and the specificity of the culture medium is improved, and the cost is not obviously increased.

The invention provides a high tellurite tolerant bacterium mediated synthesized biological tellurium nanoparticle, which is prepared by the following steps: 1) obtaining a strain mortierella sp.AB1 (Mortierella sp.AB1), and preserving in the China Center for Type Culture Collection (CCTCC) with the preservation number of CCTCC M 20211177); 2) fermenting; 3) adding a tellurite solution into the improved PDA for continuous growth; 4) collecting thalli, performing suction filtration, washing, performing suction filtration, freezing, grinding and resuspending; and 5) washing with Tris-HCl and n-caprylic alcohol, washing with deionized water in sequence, and re-suspending. The invention further provides antibacterial application of the biological tellurium nano-particles. The strain is stable in biological function, and the tellurite reducing capacity and the biological tellurium nano-particle synthesis capacity are high; the product is low in production raw material price, simple in synthesis process condition, safe and controllable, simple in preservation mode, high in stability and strong in antibacterial ability.

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 relates to a tellurium-manganese-cadmium nano-powder and a preparation method thereof. The nano-powder is prepared by taking a cadmium salt, a manganese salt and a tellurite as reaction raw materials, adding sodium citrate and thiohydracrylic acid as stabilizers and a hydroboron as a reducing agent through a hydrothermal reaction. The molar ratio of Cd to Mn to Te in the cadmium salt, the manganese salt and the tellurite is 1: (0.1-0.5): (1.1-1.5); the molar ratio of the cadmium salt to the sodium citrate to the thiohydracrylic acid is 1: (0.1-1): (1-5). The process method is simple to operate, does not need a protective atmosphere, is controllable in powder size and low in reaction temperature, and the prepared product is of a pure-phase sphalerite structure. The powder can be used in the fields of radiation detectors, solar cell raw materials, photocatalysis and the like.