57results about How to "Good acid stability" patented technology

To provide a green phosphor with high conversion efficiency of blue of near-ultraviolet light and excellent color purity, a multinary oxynitride phosphor represented by the general formula [I] is proposed.

M1_xBa_yM2_zL_uO_vN_w  [I]

In the formula [I], M1 represents Cr, Mn, Fe, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm and Yb, M2 represents Sr, Ca, Mg and Zn, L represents metal elements belonging to the fourth group or the fourteenth group of the periodic table, and x, y, z, u, v and w are the numeric values in the following ranges:

0.00001≦x≦3

0≦y≦2.99999

2.6≦x+y+z≦3

0<u≦11

6<v≦25

0<w≦17.

A fire-resistant and acid-proof alpha-amylase and its production are disclosed. The process is carried out by separating precursor-alpha-amylase gene from lichenized bacillosporin, mutating for L134 and S320 amino acid residues and high-efficient expressing alpha-amylase mutant in bacterium. It achieves better safety, expression and acid stability, and more yield.

This invention relates to non-precious metal fuel cell cathode catalysts, fuel cells that contain these catalysts, and methods of making the same. The fuel cell cathode catalysts are highly nitrogenated carbon materials that can contain a transition metal. The highly nitrogenated carbon materials can be supported on a nanoparticle substrate.

The invention relates to a preparation method of aquatic protein peptide microcapsules. The preparation method comprises the following steps that dry aquatic protein peptide is selected to be used as core materials and is subjected to ultramicro crushing treatment; 0.5 to 1 mass percent of gelatin, 1 to 2 mass percent of arabic gum and 0.5 percent to 0.8 mass percent of xanthan gum are respectively weighed, are completely dissolved through water addition and are used as wall materials through proportional mixing; the wall materials and the core materials are mixed according to a ratio of 6:1 to 7:1, and the emulsification homogenizing treatment is carried out; and the emulsified and homogenized wall materials and the core materials are subjected to spray drying, and the aquatic protein peptide microcapsules are obtained. The microcapsules obtained according to the preparation method provided by the invention have the advantages that the encapsulation efficiency is high, the palatability is good, the acid stability is good, the slow release is realized, and in addition, the digestive absorption of the peptide is not influenced. The preparation method has the advantages that the newaddition of equipment is not needed, the process is reasonable, the operation is simple and convenient, and the industrial production is easy to realize.

Disclosed are a novel synthetic cationic vegetable oil fat liquor and a preparation method thereof. The novel synthetic cationic vegetable oil fat liquor is prepared from rapeseed oil, methanol, ethanolamine and quaternary ammonium salt ETA (epoxypropyl trimethyl ammonium chloride) by transesterification between the rapeseed oil and the methanol, amidation reaction between rapeseed oil fatty acid methyl ester and the ethanolamine and reaction between quaternization reagent and a product obtained from amidation reaction. The novel synthetic cationic vegetable oil fat liquor and the preparation method have the advantages that by means of an internal emulsification method, cationic active groups are introduced into rapeseed oil molecular structures, and accordingly, the novel synthetic cationic vegetable oil fat liquor is high in dilution-resisting, acid-resisting, alkali-resisting and chromic-salt-resisting stability; permeation and even distribution of chromium can be promoted, chromium absorption of rawhide is increased, and the novel synthetic cationic vegetable oil fat liquor can serve as a pre-fat-liquoring material before chrome tanning; the novel synthetic cationic vegetable oil fat liquor has excellent oil and color fixation performance, thereby being a preferred material serving as leather dyeing and oil and color fixing after fat liquoring.

The invention provides a seedling strengthening agent for rice seedling culture and a use method thereof. The seedling strengthening agent is prepared from the following raw materials in percentage by weight: 45 to 55% of nutrient agent, 8 to 12% of acid regulator, 0.5 to 1.2% of sterilizing and disinfecting agent, and the balance of turfy soil, wherein the nutrient agent is prepared by mixing ammonium sulfate, urea, monopotassium phosphate, potassium humate, calcium magnesium phosphate fertilizer, silicon fertilizer, zinc sulfate, and ammonium ferrous sulfate according to a mass ratio of 1:(0.1 to 0.3):(0.05 to 0.1):(0.2 to 0.4):(0.2 to 0.3):(0.1 to 0.2):(0.02 to 0.06):(0.01 to 0.03); the acid regulator is prepared by mixing concentrated sulfuric acid and natural material with high acid maintaining property; the sterilizing and disinfecting agent is prepared by mixing 10% fubol wettable powder and potassium permanganate according to a mass ratio of 1:(0.2 to 0.7); the natural material with high acid maintaining property is selected from one of straw biomass carbon, expanded vermiculite, and diatomite tailings. The use method comprises the following steps of mixing seedling bed soil and the seedling strengthening agent, primarily adjusting, and slightly adjusting according to the pH (potential of hydrogen) value of the primarily adjusted bed soil. The seedling strengthening agent for rice seedling culture has the advantages that the excellent seedling strengthening, root promoting, greening and disease-resisting functions are realized, the acid stability is higher, and the easiness in recovery of the pH value is avoided.

The invention discloses bifidobacterium adolescentis capable of inhibiting filamentous fungi and an application of the bifidobacterium adolescentis, and belongs to the technical field of biology. Theinvention provides a bifidobacterium adolescentis CCFM1108 strain, and the strain can inhibit filamentous fungi. Inhibition of filamentous fungi is specifically reflected in that after the strain is co-cultured with penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores, the germination rate of the penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores can be remarkably inhibited within 7 days; and after the fermentation supernatant of the strain is separately co-culturedwith penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores, germination of the penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores can be remarkably inhibited, and the spore germination inhibition rates can reach 99.88+/-0.66%, 92.23+/-0.53%, 88.83+/-0.82% and 99.25+/-0.62% respectively.

The invention relates to a novel amphiphilic block acrylic resin retanning agent and a preparation method thereof. The invention is characterized in that the preparation method comprises the following steps: 1. (methyl) acrylic acid reversible addition-fragmentation chain transfer free-radical polymerization; and 2. synthesis of amphiphilic block acrylic resin retanning agent. The amphiphilic block acrylic resin retanning agent is a milk white thick liquid in appearance, the pH value is 3.0, and the effective substance content is 20-30 wt%. The product has the advantages of favorable acid-resistant stability, favorable alkali-resistant stability and favorable storage stability, enhances the absorption of the wet blue leather for the chrome tanning agent, enables the crust leather grain surface to be fine, compact and full, and obviously enhances the tearing strength of the crust leather.

The invention relates to bifidobacterium longum and application thereof in inhibiting filamentous fungi, and belongs to the technical field of biology. The invention provides bifidobacterium longum CCFM1109, and the strain can inhibit the filamentous fungi as follows: after being co-cultured with penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores, the strain can significantly inhibit the germination rate of the penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores separately within 7 days; after a fermented supernatant of the strain is co-cultured with the penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores, germination of the penicillium expansum spores, aspergillus niger spores, penicillium roqueforti spores or penicillium digitatum spores can be significantly inhibited, and the spore germination inhibition rates can reach 98.38 +/- 0.37%, 90.23+/- 0.67%, 92.65+/- 1.27%, 96.34+/- 0.53% respectively.

The invention relates to the field of genetic engineering, in particular to a method for improving acid stability of glucose oxidase, a mutant Q241E/R499E, a gene and application. A glucose oxidase mutant GODM10 with high thermal stability is subjected to site-directed mutagenesis to obtain a mutant with improved acid stability. The glucose oxidase mutant disclosed by the invention has good enzymatic properties and can be applied to the industries of foods, feeds and the like.

The invention discloses a dacron, aupoz fiber and acetate fiber blended yarn which comprises, by weight, 45 to 55 parts of dacron, 15 to 25 parts of aupoz fibers and 15 to 25 parts of acetate fibers. According to the blended yarn, characteristics of dacron, aupoz fibers and acetate fibers are complementary and advantages are fully developed.

The invention relates to a preparation method of an acid-resistant carbon-coated metal oxide/carbon nanofiber composite material. The preparation method comprises: dissolving a metal-containing compound, a high-molecular polymer and cyclodextrin in an organic solvent, spinning the polymer solution into a nanofiber precursor through an electrostatic spinning technology, and carrying out pre-oxidation carbonization and acid pickling to obtain the acid-resistant carbon-coated metal oxide/carbon nanofiber composite material. The composite material maintains stable chemical activity in a strongly acidic solution. The product prepared by the invention is simple in preparation method, the preparation method is simple, the cost is low, the stability is good, the carbon nanofiber serving as a carrier increases the conductivity, metal oxide particles are uniformly distributed and coated with a carbon layer, and the carbon nanofiber can be used as an active electrode material of a pseudocapacitor, has high electrochemical activity and high stability under an acidic condition, and can be applied to the fields of energy storage, catalysis and the like.

The invention provides a spandex, coconut fiber and acetate fiber blended yarn. The spandex, coconut fiber and acetate fiber blended yarn comprises, by weight, 55-65 parts of spandex, 30-40 parts of coconut fibers and 15-25 parts of acetate fibers. The spandex, coconut fiber and acetate fiber blended yarn has the advantages that characteristics of the spandex, the coconut fibers and the acetate fibers are complementary to one another, and accordingly merits of the spandex, the coconut fibers and the acetate fibers can be played.

The present invention relates to variant phytase enzymes and their use thereof.

The invention is applicable to the technical field of microbial breeding and provides lactobacillus plantarum. The lactobacillus plantarum is lactobacillus plantarum PLBS003, is collected in China General Microbiological Culture Collection Center of China Committee for Culture Collection of Microorganisms on December 17, 2018 and has an accession number of CGMCC No. 16943. The invention further provides application of the lactobacillus plantarum in feedstuff of Laoshan dairy goats. Thereby, the lactobacillus plantarum PLBS003 provided by the invention has relatively good thermal stability andacidic stability; and by adding an appropriate level of lactobacillus plantarum PLBS003 into rations of the Laoshan dairy goats, the digestive absorption function of the Laoshan dairy goats to nutrients in the feedstuff can be strengthened, the milk performance of the Laoshan dairy goats and nutrients in milk composition can be improved, and the economic benefit of the Laoshan dairy goats can be improved.

The invention provides an acrylic fiber, cotton fiber and acetate fiber blended yarn which comprises, by weight, 45 to 55 parts of acrylic fibers, 45 to 55 parts of cotton fibers and 10 to 20 parts of acetate fibers. According to the blended yarn, characteristics of acrylic fibers, cotton fibers and acetate fibers are complementary and advantages are fully developed.

The present invention provides engineered tyrosine ammonia-lyase (TAL) polypeptides and compositions thereof. In some embodiments, the engineered TAL polypeptides have been optimized to provide enhanced catalytic activity and enhanced acid stability, while reducing sensitivity to proteolysis and increasing tolerance to acidic pH levels. The invention also provides methods for utilization of the compositions comprising the engineered TAL polypeptides for therapeutic and industrial purposes.

The invention provides vinylon, silk and acetate fiber blended yarn which is composed of, by weight, 45-55 parts of vinylon, 40-50 parts of silk and 25-35 parts of acetate fibers. The vinylon, silk and acetate fiber blended yarn integrates characteristics of the vinylon, the silk and the acetate fibers to bring advantages of the same into play.

The invention discloses yoghourt containing clean label starch and a preparation method thereof, and belongs to the field of foods. The method for preparing the yoghourt comprises the following step of adding the clean label starch in the yoghourt preparation process, wherein the preparation method of the clean label starch comprises the following steps of: pre-drying starch milk, grinding, dehydrating, performing heat treatment at the temperature of between 120 and 180 DEG C for 1 to 5 hours, and cooling to obtain the clean label starch. The clean label starch used in the yoghourt preparationprocess does not use a chemical cross-linking agent or other chemical additives, so the production process is simple and safe, the production cost is low, the yield is high, and pollution is avoided;and the clean label starch is added into the yoghourt, so the problems of low viscosity, rough tissue state, poor mouthfeel, whey separation and other poor quality of the yoghourt product are solved,the concept of 'clean label' healthy foods is met, and the requirements of consumers are met to the greatest extent.