9results about How to "Good conversion effect" patented technology

The invention relates to the technical field of lithium-sulfur batteries, in particular to a lithium-sulfur battery positive electrode material, a preparation method of the lithium-sulfur battery positive electrode material and a lithium-sulfur battery, and the preparation method of the lithium-sulfur battery positive electrode material comprises the following steps: S1, mixing molybdenum powder, sulfur powder, a conductive agent, a binder and an organic solvent in proportion to obtain a positive electrode active solution; and S2, coating a battery diaphragm with the positive electrode active liquid in the step S1, and drying to obtain the lithium-sulfur battery positive electrode material. In the application, the catalyst molybdenum has excellent binding capacity and conversion capacity to polysulfide, the conductivity of the positive electrode material of the lithium-sulfur battery is improved, and the positive electrode active coating and the battery diaphragm are integrally formed, so that the positive electrode active coating can be prevented from swelling when encountering electrolyte, the shuttle effect of the polysulfide of the lithium-sulfur battery is inhibited, and the service life of the lithium-sulfur battery is prolonged. And the overall flexibility of the lithium-sulfur battery positive electrode material can be improved.

The invention belongs to the technical field of biology, and particularly relates to Meyerozyma caribba XX2120, and the preservation number of the Meyerozyma caribba XX2120 is GDMCC No: 67777. The invention further relates to a preparation method of the Meyerozyma caribba XX2120. The strain is obtained by taking saccharomycetes X2120 as a starting strain, carrying out ARTP mutagenesis treatment and screening, has relatively strong acid resistance, relatively high salt stress resistance and certain alcohol resistance and aldehyde resistance, can effectively utilize monosaccharide, disaccharide and trisaccharide, has a wide utilization range on carbohydrate and has a relatively good utilization rate on inorganic nitrogen. Moreover, the strain can be used for producing mycoprotein through liquid fermentation by taking Luzhou-flavor distillers' grains as a raw material, and also can be used for performing solid fermentation on the Luzhou-flavor distillers' grains, so that the true protein content of the distillers' grains is increased, the nutritional value of the distillers' grains is improved, and the recycling of distillers' grain resources is effectively promoted.

The invention discloses bifidobacterium lactis recombinant bacteria for expressing arsenic transcription factor related genes as well as a construction method and application of the bifidobacterium lactis recombinant bacteria. The construction method of the recombinant bacterium comprises the following steps: (1) adding a signal peptide amyB, a terminator ter and enzyme cutting sites BamH I and Sal I on the basis of a plasmid pKO403lacZcm, so as to obtain a recombinant vector pKO403-amyB-ter; (2) connecting an arsR or arsB gene segment to a recombinant vector pKO403-amyB-ter, so as to obtain a recombinant plasmid; and (3) electrically transferring the recombinant plasmid into bifidobacterium lactis competent cells, and screening to obtain bifidobacterium lactis recombinant bacteria. The recombinant bifidobacterium lactis constructed by the method is not influenced by As (III), has high As (III) conversion efficiency, and can be used for treating arsenic pollution.

The utility model discloses a preparation device of glucose stevioside, and relates to the technical field of glucose stevioside production, an inlet of a conversion tank is respectively communicated with a raw material tank, an auxiliary material tank and a cyclodextrin glucoside transferase tank, an outlet of the conversion tank is communicated with a hydrolysis tank, an outlet of the hydrolysis tank is communicated with a reaction tank, and the reaction tank is communicated with a reaction tank. The inlet of the reaction tank is respectively communicated with a sucrose tank, a sucrose synthase tank, a uridine diphosphate tank, a first UGT glycosyltransferase tank, a second UGT glycosyltransferase tank and an alkali liquor tank; an outlet of the reaction tank is communicated with a first macroporous adsorption resin column, an inlet of the first macroporous adsorption resin column is communicated with a first ethanol tank, an outlet of the first macroporous adsorption resin column is communicated with a first concentration tank, and a lower outlet of the first concentration tank is communicated with a first dryer; and an outlet of the first dryer is communicated with a first glucosyl stevioside tank. And the residual substrate is converted into stevioside with relatively better taste, so that the taste and quality of the product are improved.

This invention relates to a method for preparing a water-soluble yellow reactive dye, comprising: adding water and ice to 2-naphthylamine-3,6,8-trisulfonic acid and slurrying, followed by a diazotization reaction to obtain a diazo material; adding water and ice to m-ureidoaniline, adding an alkali agent, and stirring to dissolve and obtain a clear m-ureidoaniline solution; adding the diazo material to the clear m-ureidoaniline solution and performing a coupling reaction at a controlled temperature to obtain a yellow base; adding water and ice to cyanuric chloride, adding dispersant CS and dispersant MF and slurrying, then adding sodium 2,4-diaminobenzenesulfonate and mixing and slurrying, with staged heating and pH adjustment to react and obtain a bicondensed material; adding the yellow base to the bicondensed material, heating and adjusting the pH, and performing a controlled reaction to obtain a dye slurry. The preparation method provided by this invention features high chroma conversion rate, short production cycle, and reasonable and efficient process, resulting in a product with excellent solubility, high fixation rate, good storage resistance, and bright color.

The invention discloses a catalyst for treating gas-fueled vehicle exhaust and a preparation method thereof.The catalyst is characterized in that precious metal Pd is loaded on a mixed carrier of two composite materials, the composite materials are composed of a material 1 and a material 2, the material 1 is a cerium-zirconium-aluminum composite material, and the cerium-zirconium-aluminum composite material comprises 0-20% of Ce, 0-10% of Zr, 68-98% of Al and 2% of other rare earth metal; and the material 2 is a cerium-zirconium composite material, and the cerium-zirconium composite material comprises 10-45% of Ce, 35-45% of Zr and 0-20% of other rare earth metals. The preparation method is simple, the preparation process is easy to operate, and the catalyst has excellent CH4 conversion performance, low energy consumption and excellent aging resistance. The catalyst is prepared by adopting a reduction one-step pulping method, so that the catalytic performance of the natural gas catalyst is improved, the energy consumption in the process of preparing the catalyst by adopting a traditional impregnation method is reduced, and more energy is saved.

The invention relates to the field of power transmission devices, in particular to a power device for agricultural machinery, which comprises a motor, a planet wheel mechanism is arranged at the power output end of the motor, an output shaft is mounted on the planet wheel mechanism in a matched manner, the planet wheel mechanism comprises an oil sealing seat and a gear ring, and a supporting column is rotatably mounted at the end part of the output shaft arranged in the gear ring; a first-stage wheel set annularly provided with a transmission wheel is further arranged at the end of the output shaft, a connecting disc is rotationally installed at the end of the supporting column, the transmission wheel matched with the first-stage wheel set is arranged on one end face of the connecting disc, and a second-stage wheel set matched with the power output end of the motor is arranged on the other end face of the connecting disc. The problems that a hydraulic motor is high in follow-up maintenance cost and high in management difficulty can be solved, meanwhile, the problems of deviation and large power consumption occurring during power transmission of a planet wheel can be solved, forward and reverse rotation of the motor can be achieved on agricultural machinery, in-situ steering and speed controllability of a vehicle can be achieved, installation is easy, practicability is high, and the application range is wide.

The present invention relates to the technical field of catalysts, and discloses a biogas in-situ upgrading catalyst for preparing biogas and a preparation method thereof, wherein the catalyst comprises the following components and their proportions: palladium: 2-5wt%; rhodium: 1-3wt%; nickel-based alloy: 15-25wt%; cerium: 5-10wt%; boron: 0.5-2wt%; carrier material: activated carbon, accounting for 50-70wt% of the total weight of the catalyst; wherein, in the nickel-based alloy, aluminum accounts for 5-10% of nickel. The present invention can significantly improve the efficiency and selectivity of the methanogenic reaction by optimizing the ratio of palladium, rhodium and nickel-based alloy, and shows excellent CO2 conversion capacity and high methane yield. This high efficiency makes the biogas upgrading process more economical and efficient, and reduces energy consumption.

The application discloses a method for improving gene transformation efficiency of a microorganism polysaccharide-producing strain, and the method comprises the following steps: treating the microorganism polysaccharide-producing strain by using a polysaccharide-degrading enzyme, removing the wrapping of the polysaccharide on the strain cell, obtaining the cell, and preparing a competent cell; then, an exogenous plasmid is transformed into the treated competent cell by using an electric shock; wherein the polysaccharide-degrading enzyme can degrade the extracellular polysaccharide produced in the culture process of the microorganism polysaccharide-producing strain. The application effectively improves the success rate and the transformation efficiency of plasmid transformation.