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91 results about "B-Hydroxybutyrate" patented technology

Β-Hydroxybutyric acid, also known as 3-hydroxybutyric acid, is an organic compound and a beta hydroxy acid with the chemical formula CH3CH(OH)CH2CO2H; its conjugate base is β-hydroxybutyrate, also known as 3-hydroxybutyrate.

Method for measuring beta-hydroxybutyric acid by using enzyme colorimetric reaction, matched kit and application thereof

The invention provides a method for measuring beta-hydroxybutyric acid by using enzyme colorimetric reaction, a matched kit and application thereof. Under the system of Tris-HCL buffer solution, serum beta-hydroxybutyric acid and coenzyme I are dehydrogenized under the catalysis of beta-hydroxybutyric acid dehydrogenase to generate acetoacetic acid and reduced coenzyme I, the generated reduced coenzyme I and iodonitrotetrazole chloride are reacted under the catalysis of diaphorase to generate a red substance formazane of which the highest absorbance is 505 nanometers, and then the content of the beta-hydroxybutyric acid in a biological sample is quantified by measuring the change of the absorbance of the red product at the wavelength of 505 nanometers. The method can linearly measure the concentration range (0 to 4.5 mmol / L) of the beta-hydroxybutyric acid in the biological sample, the measurement is used for judging the human ketosis for acid poisoning diagnosis, the reagent used by the method is liquid dual-reagent, and the quantity of the sample required for measuring the beta-hydroxybutyric acid is little; moreover, the reaction time during measuring is short, the operation is simple, and the method is suitable for mass detection.
Owner:NINGBO RUI BIO TECH

Stabilized beta-hydroxybutyric acid detection test paper and preparation method thereof

The invention relates to stabilized beta-hydroxybutyric acid detection test paper and a preparation process thereof. The stabilized beta-hydroxybutyric acid detection test paper consists of a whole blood filter layer, a developing layer and a base layer which are sequentially stacked, wherein the whole blood filter layer is formed by combining at least one polymer film layer; the developing layer is made of a hydrophilic material; and the base layer is made of an insoluble supportive material. The method for preparing the stabilized beta-hydroxybutyric acid detection test paper comprises the following steps of: a, soaking the developing layer into reagent solution for 2 hours, taking the soaked developing layer out, and drying the soaked developing layer by cold air; and b, cutting the whole blood filter layer, the soaked and dried developing layer and the base layer into the same specifications, and sequentially bonding the layers with glue from top to bottom. The test paper is not limited by conditions such as region and the like; patients can conveniently perform self-monitor at any time and at any place; the concentration of beta-hydroxybutyric acid can be detected in a short time by only using micro blood; and the test paper is simple to prepare and has wide market value.
Owner:苏州市玮琪生物科技有限公司

Biological sewage treatment device and method for synchronous nitrogen and phosphorus removal and sludge reduction

The invention discloses a biological sewage treatment device and a biological sewage treatment method for synchronous nitrogen and phosphorus removal and sludge reduction. The device comprises a water inlet pipe 1, an anaerobic pond 2, a mid-sedimentation tank 3, an intermediate pool 4, a BAF 5, an anoxic pond 6, a post-aeration tank 7, a secondary sedimentation tank 8, and a water outlet pipe 9 in series connection in order; the treatment process comprises the following steps: mixing raw water and P-rich returned sludge in the anaerobic pond, wherein denitrifying phosphorus accumulating bacteria (DPBs) absorb and store VFA in a body in a form of PHB (poly-beta-hydroxybutyrate) and release a large amount of phosphorus; removing VOD remained in the BAF and nitrating the nitrogen; introducing BAF nitrification liquid and the sludge in the mid-sedimentation tank into the anoxic pond together, wherein the DPBs performs denitrification for absorbing the phosphorous by using the PHB in the body as an energy source and a carbon source and using NO3<-> as an electron acceptor; removing the unnecessary phosphorus contained in the post-aeration tank and blowing off the nitrogen to prevent the sludge from floating upwards; discharging the supernatant in the secondary sedimentation tank, wherein part of the sludge containing a large amount of DPBs is refluxed and the remaining sludge is discharged. The biological sewage treatment device and the biological sewage treatment method for the synchronous nitrogen and the phosphorus removal and the sludge reduction resolves the conflict between the denitrification and the phosphorous removal, and ensures the stable water quality of effluent and low yield of the sludge.
Owner:CHONGQING UNIV

Method for preparing silicon-containing micron-fiber-toughened PHBV composite material

The invention discloses a method for preparing a silicon-containing micron-fiber-toughened PHBV composite material and belongs to the field of natural polymer material-toughened biodegradable plastics. The method comprises the following steps of dispersing a silicon-containing raw material in an aqueous sodium of sodium hydroxide with mass fraction of 10-35%, holding the temperature in a temperature range of 20-40 DEG C for 4-8 hours, diluting, filtering, adding 1-5% of a dispersant, carrying out low-pressure crushing by a homogenizing apparatus at a homogenizing pressure of 100-200bar, cycling for 6-15 times, separating and carrying out vacuum drying treatment to obtain silicon-containing micron-fiber; carrying out melt blending on silicon-containing micron-fiber, poly(beta-hydroxybutyrate-beta-hydroxyvalerate) (PHBV) at a mass ratio of (1:10)-(1:25), carrying out extrusion molding and granulating to prepare the silicon-containing micron-fiber-toughened PHBV composite material. By the method, when PHBV is toughened by virtue of the plant fiber in the prior art, the problems that the plant fiber needs to be prepared into nanoscale, a large amount of chemicals and power are consumed and the process is complex can be solved. According to the method for preparing the composite material, the agricultural residues can be utilized and thus the environment friendliness is achieved.
Owner:NANJING FORESTRY UNIV

Method for preparing test paper for rapidly determining dairy cows subclinical ketosis

The invention discloses a method for preparing a test paper for rapidly determining dairy cows subclinical ketosis, which comprises the following steps of: adding boric acid, aminoacetic acid and ethylene diamine tetraacetic acid solution in Arabic gum dissolved in a hot-water bath, adjusting the pH value of the prepared solution to be 7.0, soaking the test paper for 20 minutes in the prepared solution while the prepared solution is hot, drying the test paper in a drying oven at 60 DEG C, and standing the test paper in the drying oven overnight; and dissolving ethylene glycol, sodium nitroprusside and absolute ethyl alcohol in the hot-water bath, soaking the test paper for 20 minutes in the prepared solution while the prepared solution is hot, taking the test paper out, blotting moisture in the test paper by using filter paper, drying the test paper in the drying oven at 60 DEG C, and standing the test paper in the drying oven overnight so as to obtain the test paper. The reagent strip takes the concentration of beta-hydroxybutyric acid in blood more than 1.2mmol/L as a positive criteria; and the production practice proves that the reagent strip has the advantages of low cost, simple and easy operation, quick response, high specificity and high sensitivity, can be used for various determined samples such as blood, urine, serum, plasma and milk, and has wide application scope.
Owner:YUNNAN AGRICULTURAL UNIVERSITY

Application of beta-hydroxybutyric acid or pharmaceutically acceptable salt thereof

ActiveCN104940181AImprove pathological functional changesImprove diabetesMetabolism disorderAntinoxious agentsDiseaseBeta-Hydroxybutyric acid
The invention discloses application of a beta-hydroxybutyric acid or a pharmaceutically acceptable salt thereof, particularly discloses application of a beta-hydroxybutyric acid or a pharmaceutically acceptable salt thereof in preparation of medicines for preventing and treating diabetes mellitus and chronic complication thereof, and belongs to the technical field of medicines. A diabetes rat model is induced with streptozotocin (STZ); the prevention and treatment effects of the beta-hydroxybutyric acid on diabetes and chronic complication of rats are observed with the beta-hydroxybutyric acid through subcutaneous injection; the result shows that the weight loss of the rats can be restrained by the beta-hydroxybutyric acid; the pathology function change of chronic pancreas, great vessels, kidneys, hearts, livers and the like of the rats is improved; the beta-hydroxybutyric acid or the pharmaceutically acceptable salt thereof as an active pharmaceutical ingredient is combined with conventional additives in the field of medicines to prepare medicines; the beta-hydroxybutyric acid or the pharmaceutically acceptable salt thereof can be used for improving the diabetes and the chronic complication thereof; and clinical treatment is carried out by aiming at diseases caused by anti-oxidative stress and nitration injuries.
Owner:ZHUKANG BIOTECHNOLOGY CO LTD
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