2197 results about "Chitin formation" patented technology

The invention relates to a preparation method of a biological detergent. The biological detergent is prepared by mixing APG (C8-16), maltose, ethanol, composite amino acid, aloe, chitin, salt, probiotics, lactic acid, spice and water. According to the method, the maltose serving as a main raw material, the APG biosurfactant and the probiotics are subjected to biochemical reaction to form various biological resolvase under the auxiliary edge action of the chitin. The process comprises the following steps of: preparing the maltose, the APG and the water according to the percentage; adding the probiotics and the chitin and mixing; stirring uniformly; performing sealed fermentation for 48 to 72 hours; adding the ethanol, the composite amino acid, the aloe, the lactic acid and the spice, and mixing and stirring uniformly; adding the salt and mixing; and standing for 24 hours. The biological detergent has a good pollutant-removing effect and a wide using range, does not damage a human body, protects objects, prolongs the service life of the objects, and is safe and environment-friendly.

The present invention provides one kind of water gel containing natural high molecular material and its preparation process. The water gel has cross-linking degree of 70-95 % and water absorption of 500-80000 %, and contains natural high molecular material or its derivative selected from chitin, chitin derivative, chitosan, chitosan derivative, carrageenin, etc. The water gel may have synthetic high molecular material, inorganic filler, cross-linking sensitizer, medicine and other assistant added. It is prepared through radiation cross-linking, with the radiation dosage being 10-40 kGy. The water gel of the present invention has high water absorption, high flexibility, good medicine slow releasing performance, and may be used in wound dressing, etc.

Formulations or delivery systems are provided for controlled release of therapeutically active agents. The delivery systems are composed of polymer and lipid materials and may be prepared as a gel, paste, solution, film, implant or barrier depending on the intended application. The polymer component of the matrix is the naturally occurring biomaterial, chitosan, or a mixture of chitin and chitosan. The lipid component may include phosphatidylcholine, phosphatidylserine, phosphatidylinositol, phosphatidyl or a mixture thereof. The delivery system may be used for delivery of hydrophilic agents, hydrophobic agents or combinations thereof. The therapeutically active agents may be formulated within the matrix as free agents or incorporated into particles. In a preferred embodiment the agents are incorporated into polymeric particles that are dispersed throughout the matrix.

A desiccant compound, image projection system using the desiccant compound, and a method for utilizing the desiccant compound. The desiccant compound formed by mixing (202) a polymer binder selected from the group consisting of polysaccharides (including without limitation structural polysaccharides such as cellulose, chitin, and their functionalized derivatives), polyamines, polysulfones, and polyamides with a drying agent, typically a zeolite, at a polymer to drying agent weight ratio of 1:2.1 to 1:100, or 1:4 to 1:10. After the desiccant compound is mixed (202) it is applied (204) to a surface and cured (206), often through the application of heat and vacuum. The cured desiccant compound is conditioned (208) and the it package is sealed (210).

The invention relates to an optionally foamed sealing composition for preformed seals which can swell when treated with water. The invention also relates to a method for the production thereof out of natural rubber and / or elastomers with a matrix comprised of natural rubber / elastomer components and particle-shaped water absorbing material stored therein. The water absorbing material is a combination of (A) polysaccharide(s) selected from cellulose, starch, starch derivatives removed from grafted starch, amylose, amylopectin, dextran, pectin, inulin, chitin, xanthan, alginic acid, alginates, carrageenan, pustulan, callose, laminarin, guluronic acid, pullulan, lichenin or mixtures of the same with (B) a highly water absorbent synthetic polymer selected from polymers based on (meth)acrylate, poly(meth)acrylic acid and the salts thereof, polyacrylamide, polyalcohols or copolymers of said synthetic polymers. The invention also relates to additional cross-linking and processing auxiliary agents and to property improving agents. It is possible to securely seal superstructures, substructures, tunnels and canals with the assistance of the inventive sealing compositions.

The invention relates to a bio-organic compound fertilizer, which comprises the following components in part by weight: 10 to 30 parts of organic matter, 2 to 10 parts of compound microbial inoculants, 5 to 20 parts of humic acid, 5 to 20 parts of amino acid, 4 to 10 parts of chitin, 1 to 5 parts of polypeptide, 530 parts of nitrogen, phosphorus and potassium, 5 to 10 parts of secondary and trace elements, 5 to 15 parts of algae fertilizer, 5 to 10 parts of zeolite powder and 1 to 5 parts of synergistic agent. Through the scientific and rational formula, the bio-organic compound fertilizer achieves nutritive equilibrium and can satisfy the need of crop growth in nutrient. The microbial inoculants are added to quickly degrade natural macromolecular organic compounds into the organic fertilizer and decompose organic pollutants, which effectively improves the capacity of crops in the absorption of nutrient components, reduces the waste of the fertilizer and reduces the damage of the chemical fertilizer to soil to further achieve the nutritive equilibrium, satisfy the need of the crop growth in the nutrient, achieve the aims of low investment and high output value, improve the quality of the crops and improve the economic benefit brought by the crops.

The invention relates to a method for controlling plant diseases caused by the fungi Botrytis cinerea and Alternaria alternata, by applying to a growing plant or to fruit or vegetables before or after harvesting, a composition which comprises an effective amount for controlling said fungi of at least one oligosaccharide ingredient, active against Botrytis cinerea and Alternaria alternata, and selected from oligosaccharides obtainable by hydrolysis of chitin, beta -glucan and other similarly active polysaccharides, excluding chitosan, of cell walls of fungi, yeasts, marine plants and exoskeletons of arthropods, The composition also forms part of the invention, as does an analogous method and composition for a method for controlling plant diseases caused by Botrytis cinerea, and utilizing at least one oligosaccharide ingredient, active against Botrytis cinerea selected from oligosaccharides obtainable by hydrolysis of chitosan, and having a molecular weight within the range of about 500 to about 10,000 daltons, provided that in this instance the composition excludes acetic acid.

The invention relates to a chitosan-based transport system for overcoming the blood-brain barrier. This transport system can convey active agents or markers into the brain. The transport system contains at least one substance selected from the group consisting of chitin, chitosan, chitosan oligosaccharides, glucosamine, and derivatives thereof, and optionally one or more active agents and / or one or more markers and / or one or more ligands.

The invention discloses a preparation method of chitin aerogel, comprising the following steps of: immersing a chitin solution into a coagulant, regenerating, washing to obtain chitin hydrogel; displacing water in the chitin hydrogel with an organic liquid to obtain chitin organogel; drying the chitin hydrogel or organogel to remove the liquid so as to obtain the chitin aerogel; carrying out deacetylation on the chitin hydrogel, washing to obtain chitosan hydrogel; displacing water in the chitosan hydrogel with an organic liquid to obtain chitosan organogel; drying the chitosan hydrogel or organogel to remove the liquid so as to obtain chitosan aerogel; and carrying out heat treatment on the chitin and chitosan aerogel over 150 DEG C so as to obtain carbon aerogel. Through a nitrogen adsorption-desorption test, the specific surface area of the chitin aerogel, chitosan aerogel and carbon aerogel reaches 300m<2> / g or more than 300m<2> / g.

The invention provides a lignin composite material and a preparation method thereof. The lignin composite material is formed by mixing lignin, a high molecular compound, a fiber substance, chitin, a plasticizer, a compatibilizer, an antioxidant and a flame retardant, wherein the lignin composite material comprises the following components in percentage by weight: 2.5 to 56.4 percent of lignin, 10 to 70.5 percent of high molecular compound, 2.5 to 16.92 percent of flame retardant, 0.5 to 7.52 percent of plasticizer, 0.5 to 9.4 percent of compatibilizer, 0.05 to 1.88 percent of antioxidant, 1 to 10 percent of chitin and 5 to 4 percent of fiber. The composite material is formed by compounding the lignin serving as a base material with at least one high molecular compound and gathering by fusion through a polymer, so the composite material has the advantages of low water absorption, high mechanical performance and degradability.

Isolated and / or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius are provided. Further provided are methods of at least partially degrading, cleaving, or removing polysaccharides, lignocellulose, cellulose, hemicellulose, lignin, starch, chitin, polyhydroxybutyrate, heteroxylans, glycosides, xylan-, glucan-, galactan, or mannan-decorating groups using isolated and / or purified polypeptides and nucleic acid sequences encoding polypeptides from Alicyclobacillus acidocaldarius.

The invention relates to a chitosan nano silver gelata used for treating an inflammation in a lower genital tract, cervicitis and cervical erosion of female and empyrosis, scalding, bedsore infection and other skin inflammations such as tinea manus and pedes, and various wound infections, etc. The medicinal raw materials of the chitosan nano silver gelata of the invention are the nano silver and chitosan polymer in respective therapy dose; the nano silver is the nano silver powder or the nano silver colloid; the chitosan polymer is the chitosan and the chitin and one or more than one derivative of the chitosan and the chitin. The product of the invention has the advantages of high efficiency and being nonpoisonous, and has an extremely strong antibacterial action and an excellent therapeutic effect; compared with other nano silver gelata, the chitosan nano silver gelata of the invention has the advantages of perfect sterilizing effect, long-lasting effect and tissue repair function.

The present invention relates to a multi-layered product having at least one therapeutic agent therein and a layer containing a chitin or chitin derivative for treatment of a wound, and also to a method using such product.

The method of producing chitin, astaxanthin, protein, calcium powder and biofertilizer with shrimp shell includes the following technological steps: crushing shrimp shell, enzymolysis with composite enzyme, extracting with organic solvent, reaction and separating liquid from solid; separating the liquid into hydrolysis liquid and organic liquid ; vacuum concentrating the organic liquid to obtain coarse astaxanthin; eliminating organic solvent from hydrolysis liquid, vacuum concentrating and spray drying to obtain protein powder; soaking the solid in 3 % concentration hydrochloric acid and rinsing to obtain chitin; introducing CO2 gas to the waste acid solution and filtering to obtain active calcium powder; ultrafiltering the coarse astaxanthin liquid to obtain astaxanthin; adding phytic acid and active oligose into the effluent to obtain nutritious liquid as biofertilizer.

The invention discloses a germicidal antiviral composite containing chlorine dioxide. The composite comprises a functional composition that can provide chlorine dioxide and a stabilizing agent, wherein the stabilizing agent is a compound that can cause the functional composition capable of providing the chlorine dioxide to stably exist in a solvent or a carrier and comprises one or more of EDTA, carboxymethyl cellulose, sodium laurate, polyethylene glycol, cyclodextrin, glucan, chitin, and mucopolysaccharide and the like. The technical means adopted in the invention solves the difficulty thatthe chlorine dioxide is instable in products or a complicated stabilizing and releasing technical means is needed in application of products, thus expanding the production and application range of products.

This invention discloses a compound antibacterial silk nanometer fibrous material, accounting for weight its component proportion are: Sericin protein 58-90%; chitosan or chitin 0-40%, antibacterial agent 0-5%, electric conduction 1-4%,crossing linking 1-4%. Its process is: dissolve the pure sericin protein, antibiotics separately in polar solvent, join electric conduction medicinal preparation and crosslinking agent, using the static electricity spinning technique, making the average aperture for 0.5-5.0 micron, factor of porosity 60-90%, the mean diameter is 40-100nm and the material is nanometer textile fiber adhesive-bonded membrane. This invention has good organization compatibility with human body, Antibiotics and sericin insoluble is in homogeneous solvent, massive holes among the nanometer textile fiber adhesive-bonded membrane, which has outstanding aqueous percolation permeability, antibacterial agent distributes evenly in the nanometer textile fiber, and the medicine release effect is perfect, so it can be a kind of ideal resist bacteria injured medical material.

There is disclosed a composition and a method for the efficient non-viral delivery of nucleic acids to cells using chitosan. In order to achieve high efficiency of transfection, the composition contains a nucleic acid and a chitosan that has the following physico-chemical properties: a combination of a number-average molecular weight between 8 kDa and 185 kDa and a degree of deacetylation between 72% and 92%. The chitosan molecule can also present additional physiochemical properties such as a block distribution of acetyl groups obtained by a heterogeneous treatment of chitin, and / or a polydispersity index between 1.4 and 7.0. By correctly controlling these parameters, efficient delivery systems may be produced that are effective when optimized for different conditions such as the pH of transfection media and amine-to-phosphate ratio.

A process for extracting protein and chitin from fly maggot and preparing chitosan from the chitin incldues such steps as extracting hydrolytic protein by enzyme hydrolysis, removing stink and enhancing fragrance by Maillard reaction, enzymolyzing, removing yellow substances and black spot, etc. The quality of produced protein and chitin conforms with food grade standard.

The present invention concerns particles comprising a chitin component, such as chitosan or a derivative thereof, associated with a polynucleotide encoding an interferon (IFN) molecule, 2-5′ oligoadenylate synthetase (2-5 AS), or a combination thereof. Preferably, the chitin component comprises chitosan or a derivative thereof. The particles of the invention are useful for delivery and expression of the interferon-encoding and / or 2-5 AS-encoding polynucleotide within a host in vitro or in vivo. The invention further concerns pharmaceutical compositions comprising particles of the invention and a pharmaceutically acceptable carrier, and a method for producing particles of the present invention. The present invention further pertains to a method of inducing apoptosis in a cancer cell, such as a lung cancer cell, by contacting a target cancer cell in vitro or in vivo with an effective amount of particles of the invention. In one embodiment, a therapeutically effective amount of particles are administered to target cancer cells within a patient in vivo, for treatment of cancer, such as lung cancer. The particles and therapeutic methods of the invention provide anti-metastatic and anti-cancer therapeutics for cancer patients, particularly lung cancer patients.

Heterocyclic and acyclic silane monomers and siloxane polymers, and their halogenated derivatives, are provided for the purpose of functionalizing surfaces or materials so as to render them biocidal upon exposure to oxidative halogen solutions. The biocidal function can be imparted either before or after bonding or adhesion to the surface or material. The biocidal surfaces and materials can then be used to inactivate pathogenic microorganisms such as bacteria, fungi, and yeasts, as well as virus particles, which can cause infectious diseases, and those microorganisms which cause noxious odors and unpleasant coloring such as mildew. Examples of surfaces and materials which can be rendered biocidal in this invention include, but are not limited to, cellulose, chitin, chitosan, synthetic fibers, glass, ceramics, plastics, rubber, cement grout, latex caulk, porcelain, acrylic films, vinyl, polyurethanes, silicon tubing, marble, metals, metal oxides, and silica.

Several hemostatic bandages that are commercially available function by tightly sealing a wound so that hemostasis can occur before excessive blood loss takes place. Hemostatic bandages which seal a wound but which do not actually speed the coagulation mechanism include chitosan and chitin-based bandages. Hemostatic gauzes based on chemically modified cellulose are also commercially available. These bandages and gauzes, used in combination with various inorganic materials such as zeolite, silica, and / or diatomaceous earth powder show a synergistic effect. It has been found that the inorganic material activates the contact coagulation mechanism while the biopolymer component binds the wound and prevents excessive blood loss.

The present invention relates to a method for preparing chitin and chitosan oligosac charide. The method comprises the steps that usual raw materials such as the crust of shrimp and crab, the insect crust or the fungal mycelia, etc. are micronized through the dry process or wet process; the carapace material of the obtained fine powder raw material is decalcified with the chemical process, and then is defatted and deproteinized with the method of micro-organism compound enzyme coarse enzyme liquid co-enzymolysis, and the insect and fungus fine powder thereof is directly defatted and deproteinized; a whole cell immobilizing bioreactor of a chitin deacetylase high-yield producing strain is prepared, to perform the circulatory deacetylation to the chitin and then obtain chitosan with corresponding degree of deacetylatoion; obligate anaerobic acid-producing bacterium and high-yield producing chitosan bacterium are utilized, the chitosan is submerged and fermented in the liquid, to obtain chitosan oligosaccharide with high water solubility. The present invention has the advantages that the method is helpful to fully utilize the resources, and makes the waste to the worth, at the same time, the default of the manufacturing process of the chemical process can be avoided, the production efficiency is improved, the energy is saved, the consumption is reduced, the byproduct with corresponding high value added can be produced, the comprehensive economic benefits of the relative secondary industry are obviously improved, the industrial development is promoted, and the multi-win effect is attained.

A planting system involving a non-damaging stimulus (3) which is placed in the vicinity of a propagule (2) causes a naturally defensive substance (5) to be produced by the propagule. This substance may exist within an encapsulant (1) for a period of time so that the propagule may have enhanced disease control until it develops sufficiently to fend for itself. In one embodiment a large encapsulant surrounds a potato tuber. This encapsulant may include chitin to cause the release of chitinase through intermediate stimulants such as mRNA and activated carbon to absorb or release particular substances. The encapsulant is bound through the use of pentosan which acts with flaked chitin to achieve an outer casing and further protect the propagule both mechanically and chemically.

The anti-fouling ship paint with low biological surface energy consists of low surface energy resin, biological extract micro capsule, nanometer titania, microporous silica and solvent. The present invention has biological extracts chitin, capsaicin as anti-fouling agent through micro capsule slow releasing treatment and nanometer modified low surface energy paint and multiple anti-fouling performances. The present invention has the advantages of self-cleaning performance, corrosion resistance, heat resistance, weather resistance, etc and is used for ship as well as bridge, marine engineering member, etc.

A sponge wound dressing made from chitin and alginate and a method for forming the same are described. Chitin and alginate are mixed and then dried to form a sponge. After immersing the sponge into a solution of alkaline earth metal salt, the alkaline earth metal alginate is formed. An optional cleaning step is followed to form a sponge wound dressing made of chitin and alginate.

The invention relates to a multienzyme microorganism and plant growth promotion additive. An active regulator containing multienzyme microorganism and leavening, amylase, protease, cellulose, pectase and polyase are used as base stocks, are added with chitin, various elements and vitamins in micro quantity, amino acid and are added with a microorganism and leavening inoculum Em bacterial solution, are mixed and are fermented to prepare the multienzyme microorganism and plant growth promotion additive. The additive can effectively improve soil, strength land capacity, reduce plant diseases and insect pests, fully excavate the soil potential, bring organic nutritive compositions for plants, promote the healthy and rapid growth of the plants, remove negative influence of pesticide and fertilizer, protect soil and entironment, is beneficial for society and people, adopt waste utilization, and has low investment, low cost, rapid effect and good effect.

The invention relates to a fruit and vegetable fresh-keeping agent as well as application thereof, belongs to the field of food storage, and aims at providing a fruit and vegetable fresh-keeping agent. Active ingredients of the fruit and vegetable fresh-keeping agent comprise the following components in parts by weight: 1-4 parts of chitin as well as derivative thereof and 0.1-1 part of polyamino acid, wherein chitin as well as derivative thereof and polyamino acid are both hydrosoluble. The fresh-keeping agent provided by the invention can prolong the storage period of fruits and vegetables, can reduce the rotting rate and the loss rate, can improve the quality of fruits and vegetables, and increase the economic benefit, meanwhile has the advantages of low cost, simple formula, convenience in operation and the like, additionally is safe and reliable in component, and is harmless to human bodies.

The invention relates to a multifunctional slow release chitin fertilizer which comprises 15-80% wt of fertilizer, 10-80% wt of powder containing chitin, 5-35% wt of adhesive, 0-40% wt of filling agent, 0-20% wt of active composition and 0-10% wt of sealant. The fertilizer is prepared through granulation or bundling processes.