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184results about How to "Growth promotion" patented technology

Method for preparing chitosan-silk fibroin composite nano-fiber multifunctional patch for promoting myocardial tissue regeneration and monitoring stem cells

The invention relates to a method for preparing a chitosan-silk fibroin composite nano-fiber multifunctional patch for promoting myocardial tissue regeneration and monitoring stem cells. The method comprises the following steps: preparing a cellulose nano-fiber basal plate by an electrostatic spinning technology; alternately assembling positively charged chitosan (CS) and negatively charged silk fibroin (SF) to the surface of nano-fibers layer by layer by adopting a layer-by-layer assembly technique, and assembling 5.5-10.5 layers to form a CS-SF composite nano-fiber membrane; and planting seed cells of adipose tissue-derived stromal cells or cardiac progenitor cells labeled by green fluorescent protein and firefly luciferase on the surface of the CS-SF composite nano-fiber membrane, preparing the patch by three-dimensional co-culture. The patch has excellent biocompatibility, can be used as a cell vector, has an effect of resisting oxidative stress to improve the survival rate and treatment efficiency of stem cells, and is capable of evaluating the number, distribution and function states of transplanted stem cells, effectively preventing occurrence of post-myocardial infarction heart failure and reducing the death rate of ischemic cardiomyopathy.
Owner:GENERAL HOSPITAL OF PLA +1

Preparation method of stichopus japonicus fermented feed capable of replacing alga

InactiveCN103039727AAlleviate the pressure of overharvestingProtect the environmentAnimal feeding stuffWater contentHerb
A preparation method of stichopus japonicus fermented feed capable of replacing alga is prepared by taking water caltrop, hydrilla varticillata, water hyacinth, aggregation of grass, alfalfa and common seepweed herb as the alga replacing raw material and additionally adding four, sea mud, multi-vitamin, fish meal, mussel powder, bean pulp, earthworm powder and zeolite powder with the steps of: drying all materials till the water content is less than 12%, and crushing to be 60 meshes, so as to obtain a fermentation substrate; mixing water, brown sugar, table salt and flour, adding rhizopus, trichoderma, saccharomyces cerevisiae, bacillus subtilis and lactic acid bacteria, mixing uniformly, standing and fermenting for 2h, so as to obtain a feed fermenting bacteria solution; and inoculating the fermentation substrate according to the ratio of 0.4% to 0.5% at the environment temperature of 25 DEG C to 30 DEG C, carrying out solid fermentation, and then drying and crushing, thereby obtaining the stichopus japonicus fermented feed. The preparation method has the advantages that the raw material source is stable, the cost is low, the process is simple and east to operate, and a great significance is provided in reducing culture cost of stichopus japonicas, maintaining an ecological environment, reasonably using idle resource and prompting the health sustainable development of stichopus japonicu culture industry.
Owner:JINZHOU MEDICAL UNIV

Matrine agent plant pesticide special for killing cabbage worm and preparation thereof

The invention discloses botanical insecticide of soluble matrine used for killing cabbage caterpillar and a preparation method thereof, which aims at providing the botanical insecticide used for killing cabbage caterpillar and a preparation method thereof which adopts Chinese herbal medicine as raw material, has high matrine content, low toxin and low cost but high efficiency and is harmless to human and livestock.. The botanical insecticide comprises 15-20 portions of Chinese herbal medicine extract containing the matrine, 10-20 portions of emulsifier, 4-8 portions of penetrating agent, 0.1 portions of antioxidant and 55-60 portions of deionized water; the Chinese herbal medicine extract containing the matrine is extracted by mixing the following materials by weight portions: 20-30 portions of sophora flavescens ait, 7-10 portions of chinaberry fruit, 12-19 portions of chinaberry leaf, 10-15 portions of tripterygiumforrestii, 18-24 portions of raw aconitum, 4-6 portions of euphorbia and 6-8 portions of dried orangepeel. The insecticide comprises the matrine of super high content of about 2.0 percent and is directionally used for killing the plant louses through scientific compatibility of diversified Chinese herbal medicine components and has powerful penetrating performance that is in favor of absorption by plants, low cost per Mu (approximate to 667 square meter), low toxin, no RPP, no residue, no pollution and no drug resistance.
Owner:TIANJIN HENGYUAN BIOLOGICAL TECH DEV

Special controlled-release fertilizer for highland barley as well as preparation method and application of special controlled-release fertilizer

InactiveCN107285946ASlow control time is longComplete nutritionAlkali orthophosphate fertiliserAmmonium orthophosphate fertilisersChemistryPolyacrylamide
The invention discloses a special controlled-release fertilizer for highland barley as well as a preparation method and an application of the special controlled-release fertilizer. According to the special controlled-release fertilizer, the problem that a controlled-release fertilizer specially prepared aiming at growth characteristics of the highland barley has not been developed in the prior art is solved. The special controlled-release fertilizer for the highland barley contains fertilizer particles and a film coating packaging the fertilizer, wherein the fertilizer particles are prepared from the following components in parts by weight: 10-20 parts of urea, 15-30 parts of diammonium phosphate, 2-8 parts of zinc sulfate heptahydrate and 5-12 parts of potassium sulfate; and the film coating is prepared from the following components in parts by weight: 10-15 parts of polyacrylamide, 12-18 parts of sodium polyacrylate and 1-2 parts of starch grafted sodium acrylate. The preparation method comprises the steps of preparing the fertilizer particles, preparing a film coating solution, spraying the film coating solution to the surfaces of the fertilizer particles, and drying, so as to obtain the special controlled-release fertilizer. The special controlled-release fertilizer for the highland barley is long in effective controlled-release time, complete in nutrient content and capable of effectively promoting the growth of the highland barley and improving soil quality, so that the labor intensity is reduced.
Owner:成都璐城科技有限公司

Novel human-like collagen haemostatic dressing

The invention discloses a novel human-like collagen haemostatic dressing which has good biocompatibility, can be absorbed and is rich in calcium, zinc, copper and iron, and discloses a preparation method of the novel human-like collagen haemostatic dressing. The preparation method comprises the following steps: by taking modified protein obtained by chelating humanized human-like collagen prepared by high-density fermentation with calcium, zinc, copper and iron ions respectively as a raw material as well as taking lysyloxidase existing in mammals as a cross-linking agent, carrying out low-temperature cross-linking reaction and freeze-drying processes to obtain the novel collagen haemostatic dressing which can be used for hemostasis of wounds and postoperative hemostasis. The preparation method disclosed by the invention has the advantages that the raw materials are easy to obtain, the cost is low, the synthetic process is simple and easy to realize, process amplification is easy, and the reproducibility is good; and the human-like collagen haemostatic dressing prepared by the preparation method does not have animal-derived virus hidden danger, has an obvious haemostatic effect, can be used for hemostasis of various wounds and postoperative hemostasis, and can be used for basic research and application of related fields, such as biomedical tissue engineering.
Owner:NORTHWEST UNIV(CN)

Application of active burdock oligosaccharide to aquaculture

The invention discloses application of active burdock oligosaccharide to aquaculture, particularly the application of the active burdock oligosaccharide serving as an immunopotentiator to aquaculture. The burdock oligosaccharide is natural oligosaccharide which is extracted and separated from burdock root and has better water solubility, better stability and higher purity, wherein the oligosaccharide content is more than 95 percent; the average molecular weight is 2,134Da; 12 furoic fructoses are connected through beta (2-1) glucosidic bonds; the tail end of the burdock oligosaccharide is of a linear straight chain structure that a glucopyranose is connected onto the fructose through an alpha (1-2) glucosidic bond; and degree of polymerization is 13. When the burdock oligosaccharide is used as a growth promoting agent and the immunopotentiator in agriculture, the addition amount of the burdock oligosaccharide accounts for 0.5 to 5.0 percent of the total weight of feeds. The active burdock oligosaccharide has the beneficial effects of promoting the growth of cultured animals, improving the nutrient constituents of animal bodies and improving the nonspecific immunity and the premunition of the animals, also has high activity in the aspect of resisting bacterial infection, has a simple, convenient and feasible using method and can be suitable for cultivation of various aquatic products.
Owner:THE FIRST INST OF OCEANOGRAPHY SOA
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