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73results about How to "Promote gene expression" patented technology

Tissue-engineered bone cartilage composite scaffold and preparation method thereof

The invention discloses a tissue-engineered bone cartilage composite scaffold and a preparation method thereof, belonging to the technical field of biomaterials. The scaffold is of a multilayer integrated structure and comprises a cartilage tissue scaffold layer, a cartilage tissue calcified layer, a porous cell isolation membrane and a bone tissue scaffold layer. The cartilage tissue scaffold layer is inoculated with cartilage cells, and growth factors for promoting formation of cartilage are introduced to promote growth of cartilage cells. Main raw materials like heparan sulfate proteoglycan with good biocompatibility and degradability are selected and used and the method consisting of a cross-linking reaction, freeze drying, directional pore formation, compounding of multiple layers, overall integration and the like are carried out so as to obtain the functionalized multilayer integrated tissue-engineered bone cartilage composite scaffold with good mechanical properties. According to the invention, micro-nano hydroxyapatite crystal, degradable non-stoichiometric polyethylene glycol / poly(epsilon-caprolactone) nanometer coaxial short fiber, RGD-grafted heparan sulfate proteoglycan / oxidized sodium alginate and N-succinyl chitosan are compounded together to prepare the composite scaffold; and the composite scaffold is mainly used for restoration of full-thickness defects of articular cartilage and subchondral bone.
Owner:SOUTHWEST JIAOTONG UNIV

Method for preparing soybean Aglycin family peptide by using acetic acid

The present invention relates to the field of biotechnology and particularly relates to a method for preparing a soybean Aglycin family peptide by using acetic acid. The method for preparing the soybean Aglycin family peptide by using acetic acid comprises the following steps: subjecting raw materials to cleaning, soaking, germination, grinding and extraction, separating the slag from the slurry through a ceramic membrane and an organic membrane, and subjecting obtained materials to freeze-drying. According to the technical scheme of the invention, the acetic acid is extracted from soybeans, and the ceramic membrane and the organic membrane are combined to use, wherein the pore size of the ceramic membrane is 0.1 [mu]m and the pore size of the organic membrane is 1500 D to 6000 D. In this way, small protein and polypeptide compounds, with the molecular weight thereof between 1500 D to 6000 D, are obtained. The method is simple in operation, thoroughly in extraction effect, easy in filtration, short in production cycle, greatly improved in yield and greatly reduced in production cost. Therefore, the industrial production is easily realized. A produced Aglycin product is in the form of light yellow powders, and is good in taste and high in purity. The Aglycin product can be used as functional food for the adjuvant therapy of type 2 diabetes for preventing diabetes.
Owner:山东天久生物技术有限公司

Regulator for improving intestine health of juvenile fish of micropterus salmoides at feed change stage and preparation method and application of regulator

The invention provides a regulator for improving intestine health of juvenile fish of micropterus salmoides at a feed change stage and a preparation method and application of the regulator and belongsto the technical field of feed additives. The regulator comprises 5-30% of tea polyphenol, 5-20% of oxidized konjac glucomannan, 20-50% of linseed oil, 10-30% of inulin and 25-40% of a carrier. The preparation method specifically comprises the following steps: putting the linseed oil into a stainless steel reaction kettle, slowly adding the carrier, performing uniform stirring so as to obtain a linseed oil mixture, screening the linseed oil mixture by using an 80-100-mesh sieve, respectively adding the tea polyphenol, the oxidized konjac glucomannan and the inulin, performing uniform mixing and stirring, inspecting contents of components of the obtained mixture, and performing bottling and packaging. The obtained regulator is used in preparation of feeds for the juvenile fish of the micropterus salmoides at the feed change stage, intestine health of the juvenile fish of the micropterus salmoides at the feed change stage can be greatly improved, intestinal diseases can be reduced, anduse of antibiotics in the breeding process can be reduced.
Owner:无锡华诺威动物保健品有限公司
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