716results about How to "Not easy to hydrolyze" patented technology

The invention discloses a diluent enabling stability for acridinium ester antigen-antibody conjugate. The diluent is prepared by adding a carbohydrate, polyalcohol, amino acids, a protein stabilizer, a chelating agent, a surfactant, a preservative and an additive into a buffer solution; the diluent prepared by the invention overcomes the defect that acridinium ester is unstable and easily hydrolyzes in the buffer solution, can protect the acridinium ester antigen-antibody conjugate to improve its stability and prolong its service life, and also can be fully used in in-vivo diagnostic kits.

The invention relates to a solar cell packaging EVA adhesive film capable of resisting heat, humidity, ultraviolet light and aging, which comprises the following materials by weight portions: 100 portions of copolymer of ethylene vinyl acetate, 0.8-1.4 portions of crosslink curing agent, 0.05-0.15 portion of crosslink curing accelerator, 0.2-0.6 portion of tackifier, 0.1-0.5 portion of antioxidant, 0.05-0.25 portion of ultraviolet light stabilizer and 0.1-0.3 portion of ultraviolet light absorbent, wherein the crosslink curing agent is tert butyl peroxy 2-ethyl hexyl carbonate; the crosslink curing accelerator is triallyl isocyanurate; the tackifier is r-glycidyl ether oxy-propylltrimethoxysilane; the antioxidant is one or two selected from the group consisting of bis(2,4-dicumylphenyl)pentaerythritol diphosphite, distearyl pentaerythritol diphosphite, tris(nonyl phenyl)phosphate and tris(2,4-butylphenyl)phosphate; and ultraviolet light absorbent is gas phase silicon dioxide. The solar cell packaging EVA adhesive film can resist high temperature of 85 DEG C, humidity of 85 percent, ultraviolet light and thermal oxidative aging.

The present invention discloses a hollow hard capsule and its preparation method. It is made up by adopting prolanpolysaccharide as main body material and adding gelling agent, coagulant aids, surfactant and humectant through a certain preparation process. Said invention also provides the concrete steps of its preparation method.

The invention belongs to the technical field of feeds and particularly relates to a feed for crabs. The feed for crabs is characterized by comprising the following materials in parts by weight: 30-60 parts of pork skin, 20-50 parts of fat pork, 5-15 parts of lean pork, 6-9 parts of corn meal, 3-5 parts of soybean meal, 1-5 parts of edible oil, 0.1-1 part of garlic cloves, 1-2 parts of fish scale powder and 0.5-1.5 parts of rape seed cakes. The main problems that since the feed for crabs is difficult to absorb, the crabs grow slowly and the water quality is contaminated in the prior art are solved; the feed disclosed by the invention has the beneficial effects of being rich in nutrition and aromatic in smell, containing antiviral components, and enabling the crabs to grow fast after the feed is eaten; the feed is simple to prepare and all the materials of the feed are rich in supply.

The invention discloses a dyeing process of a pure cotton fabric, which comprises the following steps: a. taking one mass part of pure cotton fabric to be dyed; b. grinding a powdery reactive dye occupying 2-8% of the total mass of the fabric in a ball grinding mill for 2h, adding ethanol and grinding for 1h, wherein the mass of ethanol is nine times of that of the powdery reactive dye; c. adding decamethylcyclopentasiloxane, high-speed cutting for 5min at a rotating speed of 600r/min, and preparing a powdery reactive dye/decamethylcyclopentasiloxane suspension system, wherein the mass of the decamethylcyclopentasiloxane is 50 times of the total mass of the fabric; d. pretreating the pure cotton fabric to be dyed in an alkali solution of 1-130g/L so as to enable the pure cotton fabric tofully swell, and controlling the fabric liquid carrying rate to be 100-220% through a rolling machine; and e. immersing the treated fabric into the powdery reactive dye/decamethylcyclopentasiloxane suspension system, dyeing for 40min at normal temperature, slowly rising the temperature to 70-110 DEG C within 15min, fixing color for 10-60 min at the temperature of 70-110 DEG C, and finally reducing the temperature to the normal temperature to finish dyeing. The dyeing process disclosed by the invention has the advantages of high dyeing fixation rate, environmental-protection and no pollution.

The invention belongs to the technical field of deep processing and modification of oil, and particularly discloses a method for preparing glyceride rich in EPA and DHA through enzyme catalysis .Fish oil rich in EPA and DHA is used as the raw material, efficient selective catalysis of fish oil hydrolysis is conducted with lipase, and glyceride rich in EPA and DHA is obtained through molecular distillation separation purification by strictly controlling hydrolysis conditions including enzyme adding amount, pH, water-oil ratio, temperature and time .To increase the utilization rate of raw materials, EPA and DHA in a free fatty acid product obtained through molecular distillation are recovered with the urea coating method, so that transesterification can be conducted between EPA and DHA subjected to ethyl esterification and glyceride obtained through molecular distillation and rich in EPA and DHA, and the content of triacylglycerol, the content of EPA and the content of DHA in glyceride are further increased .The content of EPA and the content of DHA in triacylglycerol type fish oil obtained with the method can be increased by 25% and 15% or more respectively.

The invention provides a new method for preparing high purity chlorogenic acid, comprising the steps: after the stock solution of the chlorogenic acid is processed by washing impurity and eluting through at least four levels of macroporous resin series connection adsorption column, and then the eluate is regenerated for continuous countercurrent extraction, so that the high purity chlorogenic acid is obtained. The method is applicable to light concentration stock solution of the chlorogenic acid, and can complete the process of absorbing, washing impurity, eluting, regenerating, countercurrent extracting and recycling the solvent in a semicontinuous way; the handling capacity of samples is large, the operation is simple, the production cost can be lowered, the residual organic solvent is reduced, and the environmental pollution is relieved.

The invention provides a preparation method and application of an anti-soil polymer. The prepared polymer is used as a dispersant for a hydraulic cementing agent and/or an aqueous dispersion for potential hydraulic cementing agent and has good anti-soil performance. The preparation method the anti-soil polymer comprises a step of subjecting polyether macromonomer A with a special structure, monomer B containing a phosphoric acid or phosphorous acid group, optional monomer D and aldehyde C to condensation polymerization so as to prepare the anti-soil polymer, wherein the monomer D is selected from the group consisting of phenol, aniline, p-/o-aminobezene solfonic acid, p-/o-hydroxybenzoic acid, p-/o-aminobenzoic acid, p-/o-hydroxyezene solfonic acid, p-/o-toluidine and p-/o-methylphenol, a mol ratio of the polyether macromonomer A to the monomer B to the monomer D is 1: (0.5-12): (0-8.0), and a mol ratio of the polyether macromonomer A to the monomer B and the monomer D is 1: (0.5-12.0).

The invention belongs to the field of chemical drugs, and discloses a ruthenium complex capable of inhibiting tumor angiogenesis and a preparation method and application thereof. The ruthenium complex provided by the invention has a structure shown in a formula I or II. The preparation method comprises the following steps of: dropwise adding a silver nitrate solution to a sodium salt solution, stirring and reacting, then filtering, washing and vacuum drying a precipitate, and thereby obtaining a ligand O-O; taking ruthenium chloride, L, and lithium chloride to be dissolved in N-, N-dimethyl formamide, heating and refluxing under the protection of argon atmosphere to obtain an intermeidate Ru (L2) Cl22 +; allowing the ligand O-O and the Ru (L2) Cl22 + to be dissolved in an ethanol/water mixed solvent, heating and refluxing to obtain the ruthenium complex shown in the formula I; and allowing the Ru (L2) Cl22 +, 8- hydroxyquinoline, and ammonium acetate to be dissolved in ethanol, and heating and refluxing under the protection of argon atmosphere to obtain the ruthenium complex shown in the formula II. The ruthenium complex has the advantages of good stability, uneasiness in hydrolysis, good solubility, low toxicity, and the ability to inhibit tumor angiogenesis, and is easily absorbed by the human body.

The invention discloses a polullan polysaccharide empty hard capsule and a preparation method thereof. The preparation method comprises the following steps: mainly adopting polullan polysaccharide, gel agent, plasticizer, emulsifying agent, latent solvent, water, and the like as raw materials; stirring and dissolving the raw materials in a heating-stirring tank which is vacuumized, heating to form glue, filtering, conveying glue solution into a capsule making machine for making a capsule and finally obtaining the polullan polysaccharide empty hard capsule. The empty hard capsule has the advantages of good quality stability, uneasy friability, stable breakdown index, difficult hydrolysis, no misty and yellowing appearance on the surface while in long-term deposition and can hold solids, oily liquid, semisolids and pasty materials; especially, as the water content of the capsule is lower than that of a gelatine capsule, the capsule is more suitable for being filled with moisture-absorption medicines and aldehydes-containing medicines and has wide market prospect and practical value.

The invention belongs to the field of painting, and particularly relates to acrylic acid modified epoxy phosphate resin and an aqueous dispersion thereof. In the formula, the acrylic acid modified epoxy phosphate resin is prepared from 40-45 parts of epoxy resin, 20-30 parts of a solvent, 0.4-0.5 part of phosphoric acid, 8-12 parts of acrylic acid (ester) monomer of which acrylic acid accounts for 1.4-2 parts, 0.5-0.8 part of an initiator, 3.2-5.2 parts of neutralizer and 80-100 parts of water. The resin is prepared by the following steps: modifying epoxy resin with phosphoric acid, and reacting with acrylic acid and ester monomers thereof; adding the neutralizer and deionized water, stirring and emulsifying to obtain the acrylic acid modified epoxy phosphate aqueous dispersion, wherein the acid value of the emulsion is 10-12mgKOH/g, and the solid content is 28-38 percent. The prepared main resin dispersion body is epoxy resin, has a phosphate structure, and has a good adhesive force for metal base materials, thus having good corrosion resistance; acrylic resin is modified, introduced with carboxyl and neutralized by the neutralizer to give aqueous dispersion to resin, so that the resin can be produced into water-borne painting, and the content of VOC is greatly reduced; and multiple hydroxyl radicals are arranged on the main chain of the epoxy resin, and can be crosslinked with amino resin, urea resin and phenolic resin to produce stoving varnish.

The process of producing xylose with stalks includes the following steps: crushing stalks into 10-20 mesh stalk powder, heating water to 70-80 deg.c and adding sulfuric acid to compound dilute sulfuric acid solution of 2-3 % concentration, mixing the stalk powder and the dilute sulfuric acid solution in the weight ratio of 1 to 4-4.5 to compound hydrolyzed liquid, heating the hydrolyzed liquid at 100-105 deg.c for 50-60 min while evaporating water to reach material/liquid weight ratio of 1 to 2-3, separating the liquid from slag through squeezing, neutralizing the separated liquid with CaCO3 to pH 3-4, and filtering to obtain xylose hydrolysate. The present invention has low cost, simple pre-treatment, low power consumption and high xylose content in the product.

The invention belongs to the field of bio-pharmaceutical products, which provides a chemical modification method for recombinate human rh-Endostatin ('rh-ES' is called for short) through the way of using mPEG-propionaldehyde to be combined on the fixed point of free amino of N-terminal amino acid of rh-ES. Mono-PEG-rhES is the output material, its purity meet the requirements of biological products. It plays a key role in the hydrolysis resistance of trypsin and chymotrypsin, it can be used as long-acting formulations for its stability for pH and temperature and there is a great perspective in the clinical treatment of cancer.

The invention discloses a dry preparation method for large-size boehmite. The method comprises the following steps of: at a temperature of 120-350DEG C and under a pressure intensity of more than or equal to 10kPa, converting the gibbsite crystal structure of aluminium hydroxide into boehmite; then grinding the boehmite till the granularity is of 1-4 micrometers, and scattering the boehmite particles into water uniformly by a wet high-speed stirring method, and conducting a nano-SiO2 coating treatment on the surface; and finally performing impurity removing, purification and drying, thus obtaining the product of large-size boehmite. The large-size boehmite prepared by a dry method of the invention has low impurity content, high boehmite conversion rate and controllable crystallization granularity. In addition, employing an inorganic modifier, the method provided in the invention can substantially reduce material oil absorption rate and improve liquidity, thus broadening the application of the method in the field of electronic materials.

The invention discloses a safe lithium ion battery, which comprises an anode system, a cathode system, a membrane spaced between an anode and a cathode, and an electrolyte system, wherein the anode system comprises an anode current collector and a membrane attached to the anode current collector and containing an anode active substance; the cathode system comprises a cathode current collector and a membrane attached to the cathode current collector and containing a cathode active substance; an organic conductive film is used as the current collector in one or both of the anode system and the cathode system; and a polymer matrix with positive temperature coefficient (PTC) thermistor property is adopted in the organic conductive film. The organic conductive film has the PTC thermistor property. The lithium ion battery can avoid the safety problems of battery combustion and even explosion and the like caused by over charge and battery temperature rise due to external short circuit.

The invention relates to a silicon-containing water-soluble fertilizer. The silicon-containing water-soluble fertilizer is characterized by comprising four main nutrient elements N, P, K and Si, wherein the four main nutrient elements N, P, K and Si are supplied by three substances including water-soluble silicate, poly-condensed potassium phosphate and ammonium polyphosphate. The silicon-containing water-soluble fertilizer can be produced into a solid fertilizer or a liquid fertilizer. The fertilizer with high content of effective elements has a function of obviously increasing the yield, the quality and the stress resistance of plants, and is applicable to food crops, vegetables, fruit trees and the like.

The invention discloses a method for making lactate by ionic liquid catalyst. The method comprises the following steps: mixing alcohol and acid the molar ratio of which is 1.5 to 2 with a Brphinsted acid imidazole ionic liquid as a catalyst and a solvent for reaction together, adding ethyl acetate as a dehydrating agent, stirring and reacting for 2 to 6 hours under normal pressure at a temperature of between 60 and 90 DEG C, then distilling under the normal pressure to remove alcohol and ethyl acetate, and finally reducing pressure and stilling to collect products, wherein the feeding amount of the ionic liquid is 10 to 50 percent of the total mol number of the alcohol and acid. Because the ionic liquid catalyst used in the method has high catalytic activity, good selectivity, low cost and stable quality, is not easy to hydrate, and can be used repeatedly through simple vacuum dehydration, the method has high percent conversion and can reduce the cost for manufacturing the lactate greatly.

The invention discloses a pharmaceutical composition for treating diseases including epidemic type B encephalitis and hepatic coma, which has the advantages of wherein the bolus has the advantages of high biological availability, quick-speed medicine release, quick-speed effect, less toxic and side effects, higher medicinal content, smaller amount of administration, accurate administration dosage, easy administration, low price, and facilitated carrying. The preparation is prepared through the conventional injection extracting processes.

The invention relates to the technical field of papermaking, in particular to a side offset paper produced by shell powder and a preparation method thereof. In the side offset paper, high-whiteness hard wood pulp and high-whiteness chemical-mechanical pulp serve as the main material, and meanwhile, shell powder is auxiliary filler for producing the side offset paper; oxidized Cual is added into surface amylopectin to improve the printing surface strength of the side offset paper and avoid the defects of printing hair slip and duslting because of high paper forming ash content; meanwhile, the paper forming printing adaptability and dirty resistance can be obviously improved; and the colorful printing quality of the product is substantially improved.