2359 results about "Bacteriostatic agent" patented technology

The invention discloses an edible biological preservative film and a preparation method thereof. The edible biological preservative film comprises the following components in parts by weight: 30-60 parts of a film former, 1-10 parts of a natural antioxidant, 1-10 parts of a natural bacterial inhibitor, 1-4 parts of a plasticizer and 0.5-4 parts of an emulsifier. The preparation method comprises the following steps: mixing the components in proportion to form preservative film liquid, and preparing the preservative film by adopting a tape-casting process. According to the preservative film, excellent film forming performances of materials such as marine polysaccharides, chitosan, gelatin and the like are utilized, the natural antioxidant and the natural bacterial inhibitor are selected and used, and the modification process is carried out through the plasticizer, the emulsifier and the like, so that the prepared preservative film is good in mechanical property, delays the spoilage of an aquatic product and can effectively prolong the shelf life of the aquatic product.

The present invention provides a method of treating bacterial respiratory infections by pulmonary administration of protonated / acidified nucleic acids. These modified nucleic acids are effective as bactericidal and / or bacteriostatic agents without regard to the class of bacteria, so are especially useful when diagnosis is difficult or when multiple infectious organisms are present. The antibiotic activity of nucleic acids of the invention is not dependent on either the specific sequence of the nucleic acid or the length of the nucleic acid molecule.

This invention relates to a method for coating a medical device comprising the steps of applying to at least a portion of the surface of the medical device, a bactericidal coating layer, wherein the bactericidal coating layer comprises a bactericidal agent; and applying to at least a portion of the surface of the medical device, a bacteriostatic coating, wherein the bacteriostatic coating layer comprises a bacteriostatic agent wherein the combination of the bactericidal and bacteriostatic agents are in an effective concentration to inhibit growth of microbial organisms relative to an uncoated medical device. The two antimicrobial agents are used to develop a kit comprising these compositions in one container or in separate containers. The kit is used to coat or flush medical devices prior to or after implantation in a mammal.

The invention discloses a seed coating and a preparation method thereof, which relates to a preparation used for treating crop seeds and belongs to plant seed coating technology in the field of agriculture and forestry. Raw materials of the seed coating disclosed by the invention are composed of biological protein, humic acid, seaweed gel, sodium benzoate, ethylene glycol, Twain 80, a bacteriostatic agent, a nutritional agent and water. The beneficial effects of the seed coating are as follows: slurry and crop seeds are fully stirred according to a proportion of 1: (30-80) until the liquid medicine is uniformly distributed on the surfaces of the seeds, and the seeds can be planted after being dried. As shown in a large amount of experiments, the physical and chemical properties of a novel biological seed coating completely meet general requirements of the seed coating, the film forming property is good, the coating can quickly cure to a film under natural conditions without dropping, connecting or agglomerating, and meanwhile, the experiments prove that the seed coating can obviously promote the growth of paddy rice, corn, wheat, soybean, cotton and pepper and improve the germination rate and seedling rate and has a significant effect of preventing and treating diseases and insect pests of crops.

A natural fruit and vegetable cleaning fresh-keeping agent comprises a film forming agent, a surfactant, an antibacterial agent and an ionic agent, has both cleaning and fresh-keeping effect. The ingredients are natural food grade ingredients, harmless to human body, easy to naturally degrade, and strong in decontamination ability, after use, can effectively remove pesticide residues, heavy metals and other toxic substances on the surface of fruits and vegetables, can eliminate and inhibit the bacteria growth, also can from a film on the surface of the fruits and vegetables, and can prevent moisture loss and corruption to achieve the fresh-keeping effect.

The present invention relates to an open type plant tissue seedling cultivation method pertaining to the agroforestry field of plant tissue seedling cultivation technology. The method can be performed in a nonsterile natural environmental condition in a room temperature and the method comprises steps of adding plant extracts bacteriostatic agent in a culture medium, in each 1L culture medium, adding bacteriostatic agent of 4-15g, manufacturing a bacteriostasis culture medium, and performing an inoculated culture by utilizing the bacteriostasis culture medium. The bacteriostatic agent comprises two kinds one of which comprises garlic extracts, coptis root extracts and honeysuckle leaf extracts with a mass percent of 20-100%:0-40%:0-50%; the other one of which comprises liquorice root extracts, osmanthus extracts and lycoris radiata extracts with a mass percent of 10-100%:0-80%:0-50%. By utilizing the method of the present invention, the plant tissue seedling cultivation process can be divorced from a stringent axenic operation environment and can be performed in an open nonsterile environment, therefore, links in the plant tissue seedling cultivation are simplified radically, the working efficiency is improved and the breeding cost is greatly reduced.

The invention relates to a hydrogel wound dressing and a preparation process thereof. The finished product of the hydrogel wound dressing is prepared by using gel, a cross-linking agent, a chelating agent, pH regulator, a thickening agent, humectant and a bacteriostatic agent as raw materials, and conducting pH regulation, mixing, secondary pH regulation, drying and other processes. The hydrogel wound dressing and the preparation process have the advantages that cross-linking and curing are conducted on the basis of traditional hydrogel to form the hydrogel wound dressing, and the preparation method is simple and convenient to operate; the prepared hydrogel wound dressing overcomes the defect that water absorption of a hydrogel dressing is insufficient, the mechanical strength of hydrogel is improved, and practicability and the experience feeling are enhanced; the prepared hydrogel wound dressing can provide a wet heal environment and can also absorb a large amount of seepage; a macromolecule hydrophilic material is adopted for hydrogel, no fiber is left when the dressing is replaced, the dressing does not adhere to wound surfaces, pain is relieved, and meanwhile hydrogel is good in biocompatibility and free of toxic and side effects.

The invention relates to a dust inhibiting agent used during the railway transportation process of powdered materials and a preparation method thereof, the dust inhibiting agent comprises the following raw materials: polyvinyl alcohol, starch, polyacrylamide, carboxymethyl cellulose, natural plant glue, a surfactant, an antifreeze auxiliary agent, and a bacteriostatic agent. The dust inhibiting agent provided by the invention can inhibit the dust pollution brought by railway transportation of powdered materials, especially inhibits the PM 2.5, is capable of solving the antifreeze problem when using the dust inhibiting agent in winter, and achieves the goals of safety and environment-friendliness.

The invention discloses an absorbable medical suture line. The absorbable medical suture line comprises the following components in parts by weight: 30-50 parts of polyglycolic acid, 16-20 parts of collagen, 2.5-3 parts of chitosan, 1-2 parts of a bacteriostatic agent, 1-4 parts of a stabilizer, and 2-6 parts of a biological cross-linking agent. A preparation method for the absorbable medical suture line comprises the following steps: co-mixing the required components under a certain condition, extruding, performing water-cooling, drying in the air, pelletizing, spinning, stretching in a water bath and the like. All raw materials of the obtained suture line can be absorbed and degraded in vivo, free of stimulus on tissue, and are free of toxic or side effects, and a wound is free of obvious stitching marks after being healed. The formula of the composition is reasonably designed, so that the prepared product has excellent mechanical performances of high tensile strength, high bending modulus, and the like, and has the characteristic of easiness machining and shaping without obvious individual difference, and the pains of a patient are relieved.

The invention discloses an open-type plant tissue culture method. A volatile plant essential oil bacteriostatic agent is added into a culture medium, a high-pressure disinfection process is saved, and inoculation is performed in an indoor open environment; and the culture material is cultured in an environment with the temperature and illumination conditions for plant tissue culture. According to the invention, the volatile bacteriostatic agent can disinfect the space in a bottle while disinfecting the culture medium, thus the culture grows in a relatively sterile environment, and the probability of the culture getting polluted is reduced; a small amount of bacteriostatic agent is added into the culture medium (the total amount is 2mul-2ml / L of culture medium), and the influence on the osmotic pressure of the culture medium is avoided; the components are non-toxic to human body; and the addition amount is small, and the irritant smell is avoided.

The invention discloses an etching plaster for metal and metal oxide transparent conducting layers and an etching process, in the invention, lagging production processes, such as the use of organic solvents, strong acid etching and strong alkaline cleaning and the like, are not used any longer, instead, the etching plaster and the etching process which do not pollute the environment are used. The etching plaster comprises the following components in parts by weight: 0.1-20 parts of salt substance, 2-50 parts of non-volatile acid, 10-30 parts of aqueous high molecular polymer, 0.1-10 parts of dilute wetting dispersant, 0.1-5 parts of defoamer, 10-40 parts of thickening agent, 0.1-10 parts of bacteriostat and 2-30 parts of water. The invention simplifies the process flow, cancels acid and alkali soaking and the use of organic solvents, lowers the environmental protection cost, improves the etching quality of products, and has the effects of high efficiency, energy saving and environmental protection. The invention is widely applied to the fields of electron, semiconductors, fine chemistry industry and the like.

The invention discloses a deodorant disinfectant for household garbage. The deodorant disinfectant comprises main components and auxiliary components, wherein the main components comprise bentonite, S<2-> precipitating agent, Cu<2+> bacteriostatic agent and oxidizing agent; the mass ratio of the bentonite to the S<2-> precipitating agent to the Cu<2+> bacteriostatic agent to the oxidizing agent is 100:(2-20):(0.1-3):(0.01-3); the auxiliary components are materials which cannot antagonize the deodorizing and disinfecting functions of the household garbage; the contents of the auxiliary components are 0-50 percent of total mass of the bentonite, the S<2-> precipitating agent, the Cu<2+> bacteriostatic agent and the oxidizing agent. The deodorant disinfectant for the household garbage, which is disclosed by the invention, has the advantages of wide sources of raw materials, simpleness in manufacture and low cost; the stink of the household garbage and generation sources of pathogenic microorganism can be controlled and the problem of environment stink can be effectively solved.

The invention relates to a sustained-release oral ulcer film having biological adhesion and a preparation method of the sustained-release oral ulcer film. According to the formula, the sustained-release oral ulcer film having the biological adhesion consists of the following components in percentage by weight: 5-50% of a bio-adhesion material, 5-80% of a sustained-release film forming material, 0.5-10% of a medicine, 1-50% of a supporting agent, 1-20% of a plasticizer, 0.1-0.5% of a bacteriostatic agent and 0.5-1% of a flavoring agent. The film provided by the invention, which is prepared in a specific production mode, is good in stability, and excellent biological adhesion and sustained-release performance of the film can be kept for a long time; a soluble sustained-release gel can be gradually formed as the film is adhered to an ulcer surface and absorbs water, so that contact of the ulcer surface with external side is prevented; the oral ulcer film provided by the invention has the characteristics of diminishing inflammation, alleviating pain, achieving an antibacterial effect and being free from toxins, irritation, mutagenic action and the like; and the oral ulcer film can promote growth of blood vessel endothelium and proliferation of fibroblasts and keratinocytes, and subsequently, the oral ulcer film can promote regeneration, repair of healing of the ulcer surface.