182results about How to "Improve anti-infection ability" patented technology

This invention relates to a micro-ecological agent and the preparation method thereof, belonging to the micro-ecological agent technological field. The preparation of the active bacteria agent of this invention comprises: using L-calcii lactas and four useful micro-organisms of clostridium bytyricum, Lactobacillus casei, bacillus subtilis and saccharomycete as characteristic elements, cultured purely or mixedly by means of universal fermentator, producing active bacteria powder by freeze-drying, and acquiring the finished products by double crossing of the powder at a specific proportion. By using the anaerobic and aerobic characteristics of related bacterial strains, this agent has the following merits: playing the synergy effect in enhancing the disease resistance of marine animals and the water purification of aquaculture, substituting antibiotics fully or partly for the disease prevention and cure in fresh water aquiculture and mariculture, and improving the economic benefits of aquaculture. The L-calcii lactase component can accelerate the husking growth and prevent the disease of soft husk of shellfish marine animals like shrimp and crab. This agent is characterized of being nontoxic, free from side effects, nonpersistent, without secondary pollution and no drug tolerance, and will have a wide commercial application in the fresh water aquiculture mariculture.

The invention relates to a high-energy composite peptide selenoprotein nutrient solution, a preparation method and an application thereof. The nutrient solution is composed of selenium raw material, protein, mineral substances, vitamin, natural energy minerals and the like; the high-energy composite peptide selenoprotein nutrient solution containing rich selenium element, the mineral substances, the vitamin and natural energy substances is prepared by performing enzymolysis on the protein, and conducting synthesizing, energy treatment, complexation and strengthening treatment on a peptide selenoprotein compound, and the nutrient solution can be widely used for the development and utilization of various selenium-enriched agricultural and sideline products (comprising various food crops, vegetables, fruits, fungi, wild plants, marine food, animal meat and Chinese medicinal herbs). The application of the nutrient solution is as follows: the high-energy composite peptide selenoprotein nutrient solution mother solution is diluted by 6000-8000 times in multiple proportions by adding water, the diluted nutrient solution is irrigated and sprayed to the roots and leaf surfaces of the crops in different growth periods for 3-6 times, and therefore, the selenium-enriched agricultural and sideline products can be obtained.

The invention relates to a sow feeding method of a special wild pig. The method comprises the following steps: (1) feeding sows to reach sexual maturity when the sows are 6-7 months old and are 75-80 kg weight and reach body maturity when the sows are 7-8 months old and 80-90 kg weight and mating the sows; feeding and mating 4-6 non-pregnant sows in each pigsty; feeding each sow at the first trimester of pregnancy in a limiting pigsty or in an independent pigsty, 2-4 sows at the mid trimester of pregnancy in each pigsty and 1-2 sows at the later trimester of pregnancy in each pigsty, and feeding the sows on obstetric tables from 7 days before parturition to weaning; (2) reinforcing sow feeding management, meeting nutritional requirements in the non-pregnant to-be-mating period, the first trimester of pregnancy, the mid trimester of pregnancy, the later trimester of pregnancy and the suckling period, preparing daily rations for the different periods, feeding different feeds, and paying attention to rational matching of green and coarse fodders and concentrated feeds. According to the sow feeding method, the feed and the control for feeding are optimized, so that the sows rut quickly, the farrowing rate is high, normally 12-14 piglets are born by each sow, and the survival rate is over 90 percent.

The invention discloses a titanium dental implant material and a preparing method and application of the titanium dental implant material. The titanium dental implant material prepared through the preparing method of the titanium dental implant material comprises a base body, a cationic polymer layer, an anion polysaccharide layer-chlorination chitosan-polypeptide A conjugate composite layer and an anion polysaccharide layer-antimicrobial peptide layer composite layer. The titanium dental implant material has good biocompatibility, bacterium resistance, apoptosis resistance and angiogenesis promoting activity, can support adhesion, survival, proliferation and differentiation of various cells, promotes survival, proliferation and migration of vascular endothelial cells, forms a lumen structure of a capillary tube sample and meanwhile inhibits adhesion and survival of periodontal common pathogenic bacteria. The titanium dental implant material has durable and efficient sterilizing and infection resisting capabilities, healing of peripheral bone wounds of the implant can be accelerated, chemical bonding of an implant-bone interface can be achieved, the success rate of oral implantology is increased, the treatment time is shortened, in addition, the preparing method is simple, and a good application prospect is achieved in the oral implantology field.

The invention belongs to the technical field of biomedical engineering, and particularly relates to a chitosan quaternary ammonium salt porcine acellular dermal matrix dressing material and a preparation method thereof. The preparation method of the chitosan quaternary ammonium salt porcine acellular dermal matrix dressing material specifically comprises the following steps: S1, preparing a chitosan quaternary ammonium salt; S2, processing a porcine acellular dermal matrix; and S3, preparing the chitosan quaternary ammonium salt porcine acellular dermal matrix dressing material. The chitosan quaternary ammonium salt porcine acellular dermal matrix dressing material disclosed by the invention completely reserves morphological structures and components of cells, has the characteristic of low antigenicity, and meanwhile can induce fiber-forming cells and vascular endothelial cells with regeneration capacity to grow therein.

The invention discloses a bone tissue engineering scaffold material having anti-infection ability and a preparation method of the bone tissue engineering scaffold material, belonging to the technical field of the preparation of bone tissue engineering biomaterials. The bone tissue engineering scaffold material comprises nano-silver, hydroxylapatite, glucosan and chitosan. The simple preparation method of the invention comprises the steps of: preparing the nano-silver and the hydroxylapatite respectively on the presence of the glucosan, then dispersing the nano-silver and the hydroxylapatite to mixed solution of the glucosan and the chitosan, performing glutaraldehyde crosslinking on the mixed solution and placing the mixed solution in a low temperature refrigerator for prefreezing, and freezing and drying to obtain three-dimensional porous scaffold material. The bone tissue engineering scaffold material has a spatial structure appropriate for the growth of osteoblast and appropriate mechanical properties and degradation property, is also durable and efficient in sterilization and has excellent biocompatibility, thus bone tissue regeneration can be promoted.

The invention discloses a zinc-polypeptide complex. The complex is prepared through animal origin and inorganic zinc at a weight ratio of (1:1)-(1:5). The preparation method of the complex comprises the following steps: adding polypeptide produced by hydrolyzing with alkaline protease or bacillus subtilis neutral proteinase to the animal origin; then coordinately reacting with inorganic zinc to obtain the complex, wherein the inorganic zinc is zinc oxide, zinc chloride or zinc carbonate, and zinc oxide or zinc carbonate is better; the animal origin is low-value fish and shellfish products and leftovers or waste produced by processing fish and shellfish. The invention also discloses application of zinc-polypeptide complex in preparation of medicines for preventing and controlling virus, inhibiting the growth of a cancer cell, enhancing the anti-infection capability of an animal to pathogene, and reducing the incidence of infectious diseases.