65results about How to "Defend against invasion" patented technology

The invention relates to an external spray type antibacterial liquid dressing, and particularly relates to chitosan biological film-forming glue and a preparation method thereof. The chitosan biological film-forming glue comprises the following raw materials in percentage by weight: 0.5%-6% of modified chitosan, 0.01%-0.15% of mint, 0.01%-0.15% of acidifying agents, 0.2%-0.4% of radix scutellariae, 0.1%-0.3% of phellodendron and the balance of deionized water. The chitosan biological film-forming glue disclosed by the invention is prepared into a solution by adopting the modified chitosan, thereby keeping the self physicochemical characteristics and function roles of the chitosan and achieving good solubility property. The chitosan biological film-forming glue disclosed by the invention has good biocompatibility, multiple unique functions, namely higher solubility, easiness for organism absorption, and the like which do not exist in general chitosan, and well utilizes the biological activity of the chitosan.

The invention discloses a three-dimensional nanocomposite adhesive bandage as well as a preparation method and a use method thereof. The three-dimensional wound-protection layer of the adhesive bandage has a curved surface, and the curved surface is complementary to the uneven wound surface and comprises a nanobacterial cellulose frozen-dried membrane and an eletrospun chitosan-containing nanofiber film. The three-dimensional wound-protection layer can carry a part of liquid medicine. When in use, the adhesive bandage fully fits the wound surface, has air permeability, can keep the wound surface wet, has the functions of stop bleeding, inhibiting bacteria, promoting the healing of a wound and preventing the adhesion of the wound surface to the wound dressing and can be used widely. The adhesive bandage can well fit the concave wound surface and the convex wound surface, is applicable to the wet wound surface with many exudates, the dry wound surface which needs to be wetted by the wound dressing and the potential wound surface which needs protection, thereby being an ideal wound dressing.

The invention discloses a food-grade antibacterial freshness protection plastic packing bag. The food-grade antibacterial freshness protection plastic packing bag is prepared from the following raw materials in parts by weight: 60-70 parts of polyethylene masterbatches, 10-15 parts of propylene-butene-1 random copolymer, 15-20 parts of pueraria starch, 5-8 parts of reed fibers, 6-12 parts of nano-bentonite, 1-3 parts of a radical initiator, 2-4 parts of propolis, 2-6 parts of phytic acid, 0.5-1 part of orange peel essential oil, 0.3-0.5 part of citronella oil, 0.3-0.5 parts of thyme essentialoil, 8-10 parts of chitosan, 5-7 parts of a pH regulator, 5-7 parts of tea polyphenols, 4-6 parts of graphene, 1-3 parts of a preservative and 1-3 parts of an epoxy silane coupling agent. The propolis, the phytic acid, the orange peel essential oil, the citronella oil, the thyme essential oil, the chitosan and the tea polyphenols are added in the raw materials, the food-grade antibacterial freshness protection plastic packing bag has an antibacterial property and anti-corrosion property, breeding of bacteria in the bag is inhibited effectively, corrosion is prevented, and freshness of food andusing safety can be ensured effectively.

The invention relates to the field of medicines, and in particular relates to a cooling blood callus prescription extractive and a compounded resveratrol cooling blood callus oil preparation for treating skin burn. The callus prescription extractive comprises the following raw materials by weight: 30-50g of goldthread, 30-50g of golden cypress, 30-50g of radix scutellariae, 20-40g of rheum officinale, 20-40g of radix sophorae flavescentis, 20-40g of the root bark of shaggy-fruited dittany, 10-30g of periostracum cicada, 5-15g of cuttlebone, 50-80g of lithospermum, 20-40g of garden burnet, 10-30g of red flower and 10-20g of earthworm. The compounded resveratrol cooling blood callus oil preparation is prepared by combining the callus prescription extractive and resveratrol. The preparation has the anti-inflammatory and debridement effects, can not only cover the wound surface, reduce infection, but also can actively participate in the burn wound healing, thus greatly improving the treating effect of wound surfaces of burn, trauma and the like.

The invention discloses koumiss fruit beverage and a preparation method thereof. The koumiss fruit beverage comprises the following compositions in parts by weight: 5-60 parts of koumiss, 1-10 parts of white sugar, 0.1-2 parts of honey, 1-5 parts of fruit juice, and water with the amount to keep the total quantity to be 100 parts. The preparation method for the koumiss fruit beverage comprises the following steps: (1) weighing raw materials; (2) preparing white sugar and honey water; (3) preparing the koumiss beverage; (4) homogenizing the koumiss beverage; and (5) filling and sterilizing to obtain the finished product koumiss fruit beverage. By adding proper amount of honey and fruit juice, the advantages comprise that the sour degree of koumiss is reduced and can be accepted by the crowd, also the mouthfeel of koumiss is improved, and the nutritive value of koumiss is further improved.

The invention relates to universal influenza vaccine and a preparation method thereof. After an influenza virus HA is subjected to gene transfection to eukaryocyte, influenza haemagglutinin (HA) protein subjected to eukaryotic expression modification is inserted into a host plasma membrane, then vesicles largely displaying influenza virus envelope glycoprotein is produced with a method that a surface active agent induces a cell to bud, and the vesicles are changed into controllable and nanometer mimicry virus vesicles with uniform dimensions after purification and re-adding of the surface active agent for treatment. At the same time, by the aid of establishment of stably expressing an HA cell strain and usage of a bioreactor, the method is also applicable to large scale influenza vaccine production. The method is simple and feasible, hemagglutinin of most influenza virus (including avian influenza and swine influenza) can be displayed, and the method has excellent universality, has a great potential and can be used for designing emerging highly lethal influenza virus vaccines.

The present invention discloses a novel composite balance plant growth regulator, wherein problems of complex plant growth regulator components, narrow use range, limited applicability, easy phytotoxicity production and harm on plant growth in the prior art are solved. The novel composite balance plant growth regulator comprises the following raw materials: oligosaccharide, gibberellin, cytokinin, jasmonic acid, compound sodium nitrate, brassinolide, activator protein, paclobutrazol, trace elements, flavodic acid, abscisic acid, indoleacetic acid, an auxiliary agent and a filler. The novel composite balance plant growth regulator has characteristics of no toxicity, no public nuisance and no harmful substance residue, and can be used for seed dressing, seed soaking, pouring of roots, and spraying on leaf surfaces of plants.

The invention discloses a symbiotic composition for conditioning the female reproductive health. The symbiotic composition for conditioning the female reproductive health comprises prebiotics and probiotics, and the weight ratio of prebiotics to probiotics is (1-10):(1-10). The invention further discloses a preparation of the symbiotic composition for conditioning the female reproductive health. Pharmaceutically acceptable ingredients are added into the symbiotic composition to be prepared into powder, tablets, granules and capsules. The invention further discloses application of the symbioticcomposition for conditioning the female reproductive health in preparing drugs or healthcare food for preventing/treating female reproductive diseases. The symbiotic composition is the combination ofmultiple kinds of probiotics and prebiotics, and is beneficial to inhibiting reproduction of nocuous germs, balancing the pH value of the vagina and adjusting flora balance, thus the micro-ecology balance of the human body is maintained, the female reproductive health is effectively conditioned, and invasion of pathogenic bacteria is defended.

The invention belongs to the field of feed additives, and particularly discloses an intestinal tract health-care agent for improving the health of intestinal tracts of chickens and a preparation method of the intestinal tract health-care agent. Every 100 parts by weight of the intestinal tract health-care agent consists of the following components in parts by weight: 1-3 parts of chitosan oligosaccharide, 1-3 parts of xylooligosaccharide, 2-5 parts of garlicin, 1-3 parts of capsaicine, 4-6 parts of vitamin C, 2-5 parts of bacillus licheniformis, 5-10 parts of lactic acid powder, 1-3 parts of inosine, 0.3-0.5 part of vitamin A, 0.03-0.05 part of vitamin D, 3-8 parts of citric acid and the balance of anhydrous dextrose. The intestinal tract health-care agent disclosed by the invention protects the health of the intestinal tracts of the chickens in all respects according to the characteristics of the intestinal tracts of the chickens, improves the immunity of organisms, strengthens the disease resistance, and is safe, effective, free from residues and free from drug tolerance.

The invention provides a D2D packet communication method, which comprises the following steps: judging whether the distance between a first user and a user cluster is smaller than a preset distance and whether the number of the user clusters is smaller than a preset value; if yes, obtaining the communication probability of the first user and other users according to the social distance function, the user association function and the real-time trust degree corresponding to the first user and based on a Chinese restaurant algorithm; obtaining the independent grouping probability of the first user according to the communication probability and the independent grouping expected parameters of the first user; and performing grouping according to the grouping probability and performing intra-group communication. Through the combination of a Chinese restaurant algorithm and social distance parameters, a trust calculation model is introduced to measure the legitimacy of user identities, and real-time credibility measurement is carried out on users participating in D2D grouping, so that personal privacy disclosure is prevented, and invasion of illegal users is resisted. The invention also provides a D2D packet communication system, a computer readable storage medium and communication equipment, which have the above beneficial effects.

The invention provides an image encryption method based on the Hash function and an inserting-deleting model and relates to the field of image encryption. The Hash function and an inserting-deleting model of DNA computing are introduced to an image encryption processing. First, operating pixel values by use of the Hash function to obtain a Hash table; scrambling the pixel values according to the Hash table and then performing DNA coding to a scrambled matrix; in addition, the method makes full use of the advantages of the inserting-deleting model; the inserting-deleting model is applied in spreading the pixel values of the image. Simulation results and security analysis show that the method not only has large cipher code space and high sensitivity, but also can resist exhaustive attacks, statistical attacks, and differential attacks, etc., and has good encryption effect. The method is stressed on applying the Hash function and the inserting-deleting model in image encryption.

The invention discloses a preparation method of functional probiotics capable of enhancing immunity and assisting antianaphylaxis, which belongs to the technical field of microbial preparations. The invention particularly relates to the preparation method of functional probiotics capable of enhancing immunity and assisting antianaphylaxis. The preparation method comprises the steps of preparing acomposite traditional Chinese medicine extract for later use; fully mixing composite active probiotics and composite prebiotics in proportion to obtain a mixture A; fully mixing the composite traditional Chinese medicine extract with the mixture A in proportion to obtain a mixture B; adding the mixture B into a composite culture medium, putting into a fermentation tank, and carrying out sealed fermentation to obtain a mixture C; and adding composite vitamins into the mixture C, and fully stirring and mixing to obtain the functional probiotics. The functional probiotics disclosed by the invention are prepared by taking composite active probiotics, composite prebiotics and the composite traditional Chinese medicine extract as raw materials through fermentation and mixing. The preparation method is simple. The preparation can be completed by adopting simple mixed fermentation equipment. The production cost is reduced, and the preparation method is suitable for large-batch popularization.

The invention discloses an ovomucin liquid preparation. The ovomucin liquid preparation comprises the following components by weight percent: 0.01-0.1% of ovomucin, 0.001-0.01% of accessory protein, 1.5-4% of amino acid, 0.5-5% of polyhydric alcohols, and the balance of buffer solution of which the pH value is 6-8 or water, wherein the accessory protein is lysozyme and/or ovotransferrin; and 1L of the ovomucin liquid preparation also contains 50-500mmol of calcium ion or 10-500 mmol of magnesium ion. The ovomucin liquid preparation has good adhesion to bacteria, strong resisting activity to viruses, and high solubility to the ovomucin; the effective period of the biological activity of the protein is long; microbial invasion can be effectively withstood; the activity and the toxicity of the viruses are reduced; and the ovomucin liquid preparation has a certain inhibiting effect on H5N1 and H1N1 influenza viruses, and can be sprayed on the surface of the food, animal or human mouths and noses, wounds and the like and has the functions of resisting microbial invasion and reducing the activity and the toxicity of the viruses.

The invention provides an alpha-position tetrapropyl-substituted metal phthalocyanine, a preparation method thereof, a perovskite solar cell and a preparation method of the solar cel, and belongs to the technical field of solar cells. The metal phthalocyanine provided by the invention is low in price, has excellent semiconductor characteristics, has good solubility in an organic solvent, can be used to prepare a hole transport layer of a non-doped perovskite solar cell by a low-cost liquid phase spin coating process, and can effectively improve the stability of a component of the perovskite solar cell. The hole transport layer of the perovskite solar cell provided by the invention is beneficial to extraction and transport of photogenerated holes of a perovskite active layer, helps to reduce the recombination probability of electrons and holes, and is more advantageous for improving the component performance. The phthalocyanine molecule provided by the invention has a peripheral propylsubstituent, and the propyl substituent helps to improve the hydrophobic property of the material, can effectively resist the invasion of water molecules, can effectively protect the active layer of the perovskite, and contribute to the improvement of the component lifetime and stability.

The invention relates to the technical field of biological control, and particularly discloses bacillus velezensis, a microbial agent thereof, a preparation method of the microbial agent and application of the bacillus velezensis. The collection number of the bacillus velezensis is CGMCC NO.19860; the collection unit of the bacillus velezensis is China General Microbiological Culture Collection Center; the collection name of the bacillus velezensis is bacillus velezensis WSW2,; and the collection time of the bacillus velezensis is May 21, 2020. The bacillus velezensis has the characteristics that the prevention and control effect is good and tomatoes cannot be polluted.

The invention discloses preparation and application of bacillus amyloliquefaciens capable of preventing and treating tobacco bacterial wilt, particularly relates to preparation and application of bacillus amyloliquefaciens capable of preventing and treating tobacco bacterial wilt, and particularly relates to beneficial microbial bacteria which are bacillus amyloliquefaciens. The bacillus amyloliquefaciens is preserved in China General Microbiological Culture Collection Center with the number of CGMCC No.6462. The adopted fermentation process is a liquid fermentation process, bacillus amyloliquefaciens powder is prepared by adopting more advanced ultrafiltration concentration and spray drying modes, and preparation is conducted by adopting an ultrafiltration concentration mode, so that thelive spore count of a product can quickly reach 100 billion/g. Through a proper use method, the bacillus amyloliquefaciens is fixed on the rhizosphere, the body surface and the like of a plant, competes for surrounding nutrients with pathogenic bacteria and secretes antibacterial substances to inhibit growth and propagation of the pathogenic bacteria, and meanwhile, a plant self-regulating systemcan be enhanced to resist invasion of the pathogenic bacteria, so that the purpose of biocontrol is achieved.

The invention relates to the field of building materials, and particularly discloses concrete and a preparation method thereof. The concrete is prepared from the following raw materials: cement, water, fly ash, slag powder, fine aggregate, coarse aggregate, a high-performance polycarboxylate superplasticizer and a pH response type capsule. The pH response type capsule comprises a coating and a core material, the coating is a poly (L-lysine-amino-terephthalic acid) microcapsule film, and the core material comprises barium hydroxide and an amino alcohol corrosion inhibitor; the preparation method comprises the following steps: mixing and uniformly stirring the cement, the slag powder, the fly ash, the coarse aggregate and the fine aggregate to obtain a solid mixture; adding the rest raw materials except the pH response type capsule and water into the solid mixture, stirring to obtain a concrete matrix, adding the pH response type capsule into the concrete matrix, and stirring to obtain the concrete. The concrete has the advantages that the anti-corrosion effect of the concrete is improved, and then the durability of the concrete is improved.

The invention discloses application of sulforaphane and derivatives thereof as a bacterial effector protein transcription inhibitor. The invention provides an application of sulforaphane and derivatives thereof in any one of application of the following 1) and 7): 1) prevention and treatment of pathogenic bacteria; 2) improvement of the resistance of plants to pathogenic bacteria; 3) inhibiting ofpathogenicity of pathogenic bacteria; 4) inhibiting of the function of a pathogenic bacterium III type secretion system; 5) inhibiting of the expression of effector protein related genes of a pathogenic bacterium type III secretion system; 6) inhibiting of the expression of a pathogenic bacteria transcription factor hrpL; and 7) using as a pathogenic bacteria effector protein transcription inhibitor. Experiments prove that the sulforaphane and the derivatives thereof can inhibit the function of a pathogenic bacteria type III secretion system by specifically inhibiting transcription of the pathogenic bacteria type III secretion system, can resist invasion of pathogenic bacteria without destroying interaction between plants and beneficial microorganisms, and have a wide application prospectin prevention and treatment of plant pathogenic bacteria.

The invention discloses delivery powder for sow parturition. The delivery powder comprises 0.3-1 part of fennel essential oil, 1-4 parts of light calcium carbonate, 1-20 parts of calamine powder, 50-90 parts of silicon dioxide and 0.1-0.5 part of deet,wherein the particle size of the silicon dioxide is less than or equal to 25 nm; and after delivery of a sow, the delivery powder is applied to thebody surfaces of piglets or the vulva of the sow. The delivery powder has an ultra-strong dry and comfortable function, the body surfaces of the piglets can be instantly dried and comfortable by applying a small amount of the powder, the body temperature of the piglets is effectively kept, the survival rate and health piglet rate of the piglets are increased, the delivery powder is applied to umbilical cord breaking, tail breaking and castration wounds of the piglets, inflammation diminishing and bleeding stopping are rapidly achieved, the probability of invasion of external bacteria is reduced, dryness of the rest position of the piglets is guaranteed, and bacterial reproduction is inhibited; and the morbidity of common diseases such as bacterial diarrhea (especially yellow, white and reddysentery) and streptococcus of the piglets is reduced, the safe mosquito repelling effect can be achieved when the powder is used in summer, mosquito bites are prevented, and the probability of diseases such as encephalitis B and African swine fever is reduced.