9results about How to "Thermally stable" patented technology

The application belongs to the technical field of microorganisms, and particularly discloses application of Bifidobacterium longum subsp. longum CGMCC No. 20105 in bacteriostasis. The application discloses for the first time that the Bifidobacterium longum subsp. longum strain CGMCC No. 20105 has the ability to ferment TPY or MRS to synthesize bacteriostatic substances, and the fermentation liquor has certain inhibitory effect on intestinal pathogenic bacteria, oral pathogenic bacteria, environmental pathogenic bacteria and antibiotic-resistant microorganisms. More importantly, the fermentation product does not affect the survival performance of conventional probiotics, indicating that the bacteriostatic substances synthesized by the Bifidobacterium longum subsp. longum strain CGMCC No. 20105 fermentation have certain safety, specificity and pertinence. Compared with other MRS fermentation strains, the bacteriostatic effect of the MRS fermentation liquor of the Bifidobacterium longum subsp. longum strain CGMCC No. 20105 is remarkable, and therefore has potential application value.

The invention relates to a system and method for testing the high-temperature creep performance of a thermoplastic non-crosslinked insulating material, and relates to the technical field of cable material performance test.The system comprises a temperature control box, a sample bearing frame and a pressure loading mechanism; the temperature control box body is provided with a test chamber which can be closed, a temperature control module is arranged on the temperature control box body, and the temperature control module is used for controlling the temperature of the test chamber and realizing air circulation in the test chamber; the sample bearing frame is fixedly arranged in the test chamber and is used for horizontally bearing at least one sample to be tested; the pressure loading mechanism comprises a pressure applying unit and a weight assembly, the pressure applying unit is arranged on the upper side of the sample bearing frame, and the weight assembly is connected with the pressure applying unit, so that the pressure applying unit applies constant vertical acting force to the surface of the to-be-tested sample. Through a high-precision temperature control and forced circulation system integrated by the temperature control box body and the temperature control module, the temperature fluctuation and gradient in the box are effectively reduced, a more stable thermal environment is provided, and a test temperature field is more uniform.

This invention discloses a hot melt adhesive for high-temperature protective clothing and its preparation method, comprising the following raw materials: Fischer-Tropsch wax, styrene-isoprene-styrene block copolymer with 0% diblock content, styrene-isoprene-styrene block copolymer with 20-30% diblock content, styrene-isoprene-styrene block copolymer with 40-50% diblock content, rosin resin, petroleum resin, ethylene-vinyl acetate copolymer, and antioxidant. This hot melt adhesive requires no toxic solvents, possesses both heat resistance and water resistance, and is suitable for high-temperature protective clothing. The preparation method of this hot melt adhesive involves heating and mixing polymer materials without adding any solvents or toxic substances during the preparation process, reducing the risk of toluene poisoning, completely solving the problems of solvent evaporation and recovery, and, more importantly, eliminating safety hazards in the storage and use of organic chemicals, achieving environmentally friendly, safe, and efficient production.

The present invention provides a method of producing short amylose, treating a native starch containing amylopectin with a 4-a-glucanotransferase to extend the starch chain, and treating the extended starch chain with a starch debranching enzyme to produce an a-amylase resistant starch comprising short amylose fragments; the method is a method for producing the low-molecular-weight alpha-amylase resistant starch under the condition of high temperature, the obtained alpha-amylase resistant starch has the polymerization degree of 12-25, the conversion efficiency from natural starch to the alpha-amylase resistant starch is not lower than 50% by weight, the whole reaction process is carried out under the condition of 80-85 DEG C, and the alpha-amylase resistant starch can be produced under the condition of high temperature. The resistant starch capable of resisting hydrolysis of alpha-amylase can be obtained and is used for reducing the calorie content of the starch or increasing the content of dietary fibers of the starch; meanwhile, the low-molecular-weight alpha-amylase resistant starch has thermal stability at least in a solution of about 80 DEG C, so that the low-molecular-weight alpha-amylase resistant starch can be widely applied to food processed under high temperature or high humidity.

This invention relates to an npn-type solar-blind ultraviolet detector using Ga2O3 as the light-absorbing layer and its fabrication method. The detector, from bottom to top, comprises a GaN substrate, a CuI hole transport layer, a Ga2O3 solar-blind ultraviolet absorption layer, a Ti electrode layer, and an Au electrode layer. An In electrode layer is disposed on one side of the CuI hole transport layer on the GaN substrate. This invention uses n-GaN, which has high electron mobility, good thermal stability, and a mature fabrication process, as the bottom substrate; p-CuI, with high hole concentration, high mobility, and excellent p-type conductivity, and good energy level matching with n-GaN and subsequent materials, as the hole transport layer; and n-Ga2O3, with an ultrawide bandgap, high chemical stability, and a high absorption coefficient for solar-blind ultraviolet light, as the light-absorbing layer. Combining the low contact resistance of the bottom In electrode with the high contact area of ​​the top Ti / Au interdigitated electrode improves carrier collection efficiency.

The application provides an antibacterial peptide AMP-OUC329 of marine plant Lactobacillus and application thereof, the antibacterial peptide is derived from marine plant Lactobacillus Bac-329, the amino acid sequence is VSGFETLDEDAKKLSNN, the molecular weight is 1866.5 Da, and the antibacterial peptide has thermal stability and acid stability.The application extracts the metabolite of Bac-329 strain by culture, obtains the crude extract of antibacterial peptide, uses the antibacterial activity of water product spoilage bacteria Shewanella and the damage of bacterial microstructure as directional screening index, separates by Sephadex G-25 gel filtration chromatography and TSKgel G2000SWxl reverse phase high performance liquid chromatography, optimizes the separation and purification conditions of antibacterial peptide, and the obtained antibacterial peptide has strong inhibition activity on Shewanella and precise target.

The application discloses a kind of ZIF-8 nanoparticle loaded cellulose barrier membrane and preparation method thereof, comprising the following steps: (1) TOCNF suspension gel is diluted into TOCNF suspension by deionized water, to obtain nanocellulose suspension solution A;(2) zinc nitrate hexahydrate is added in solution A to obtain solution B;(3) polyvinylpyrrolidone is added in solution B to obtain solution C;(4) 2-methylimidazole is added in solution C to obtain solution D;(5) solution D is placed in mold by vacuum filtration device to form a wet film, the wet film is removed, and the wet film is clamped between two pieces of acrylic plate, dried in vacuum drying oven, to obtain ZIF-8 nanoparticle loaded cellulose barrier membrane.The application selects TOCNF as the template for ZIF-8 growth, TOCNF as the template for ZIF-8 in-situ growth, which can effectively prevent them from forming aggregates, and load ZIF-8 nanoparticles through in-situ + non-in-situ method to improve the hydrophobicity, thermal stability and ultraviolet shielding property of TOCNF membrane.

The application discloses a kind of P-containing polythiol compound, LED silicone encapsulating material and its preparation method, by introducing the hetero element such as sulfur, phosphorus with higher molar refractivity and smaller molar volume, and smaller dispersion coefficient, to effectively improve the refractive index of polymer, and have better light transmittance;At the same time, the design of unsymmetrical conjugated aromatic side group structure can reduce the crystallization rate of molecular chain, ensure the light transmittance of encapsulating material.The polythiol compound is dissolved in liquid mercapto crosslinking agent and vinyl organosilicon oligomer to occur mercapto-alkene free radical polymerization to prepare high light transmittance, high refractive index and high thermal stability organosilicon encapsulating material.

The invention relates to the technical field of chromatographic analysis, and discloses a chromatographic instrument rapid heating method and system, an intelligent terminal and a storage medium, and the method comprises the following steps: applying a high-frequency alternating current to a peripheral electromagnetic coil of a chromatographic column, and generating heating power by virtue of an eddy current; carrying out forced heat exchange on the carrier gas and the outer surface of the chromatographic column to form a convective heat exchange field; the heating power generates temperature gradient to excite the thermoelectric effect of the metal tube wall to generate thermoelectric electromotive force; inverting the current average temperature and temperature difference trend based on the calibration relation, and cooperatively regulating the current and the carrier gas flow to construct a composite thermal field; when the current average temperature reaches the preset target temperature and the temperature difference trend information shows that the temperature distribution tends to be steady, switching the regulation and control parameters of the high-frequency alternating current and the preheated carrier gas to a steady-state maintenance mode, and enabling the chromatographic column to enter a constant-temperature control stage; according to the invention, the rapid heating efficiency of the chromatograph can be improved.