3405 results about "Chitin" patented technology

This invention relates to the use of a biomaterial for the treatment, repair and / or enhancement of bodily tissue insufficiencies of the vocal chords, muscles, ligaments, cartilage, post-operative regions, sexual organs and / or weight supporting areas of the feet as well as other conditions of the bones and joints. The biomaterial for use in the invention may comprise an injectable bioresorbable polysaccharide composition wherein the polysaccharide may be succinochitosan glutamate. This invention also relates to the use of a biomaterial comprising an injectable bioresorbable polysaccharide composition in which resorbable particles may be in suspension, the said particles comprising or consisting essentially of chitin and / or chitosan, which may be free of any additional formulation modifying agents, and a process for manufacturing the same. The invention also includes the use of various medicaments in the biomaterial formulations to enhance the treatment of the affected area of the body.

A functional fibre of regenerated ceratin is prepared through preparing ceratin solution from goat or sheep wool, camel or yak hair, feather, leather leftover, etc, adding one or more of metal oxide, organic metal compound, chitin, chitosan, cyclodextrin, polyether and polyacrylic acid, which have the antistatic, antibacterial, deodorizing, drying, heating lagging and hydroscopc functions, and spinning.

The invention relates to a plant nutrient liquid fertilizer. In order to solve the problem of over fertilization, the plant nutrient liquid fertilizer is prepared from the following raw materials in proportion by weight: aqua brassin 12-36, gibberellin 1-4, indoleacetic acid 30-80, abscisic acid 10-20, naphthaleneacetic acid 50-90, salicylic acid 80-180, vitamin C 1-3, cane sugar 40-100, chitin 20-80, 0.05-0.2 percent triacontanol 400-1,000, hydrolyzed protein 2-5, potassium dihydrogen phosphate 300-400, thiourea 40-120, cobalt chloride 5-12, borax 50-100, sodium silicate 30-55, urea 300-500, ammonium molybdate 50-80, copper sulfate 30-65, zinc sulfate 120-200, magnesium sulfate 100-150, calcium chloride 50-120, manganese sulfate 40-80 and water in the amount of 3-8 times the total amount of all the raw materials or water in the amount capable of dissolving all the raw materials, wherein the water is de-ionized water or micro cluster water; and the preparation method is that all the materials are prepared into aqueous solution. The plant nutrient liquid fertilizer has the advantages of favorably solving the problems of over fertilization and shortage of nutrient elements in soil, obviously improving the plant adverse resistance, improving the photosynthesis and the accumulation efficiency of nutritive materials and improving the yield and the quality.

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.

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.

A genetically modified organism comprising: at least one nucleic acid sequence and / or at least one recombinant nucleic acid isolated from Alicyclobacillus acidocaldarius and encoding a polypeptide involved in at least partially degrading, cleaving, transporting, metabolizing, or removing polysaccharides, cellulose, lignocellulose, hemicellulose, lignin, starch, sugars, sugar oligomers, carbohydrates, complex carbohydrates, chitin, heteroxylans, glycosides, xylan-, glucan-, galactan, or mannan-decorating groups; and at least one nucleic acid sequence and / or at least one recombinant nucleic acid encoding a polypeptide involved in fermenting sugar molecules to a product. Additionally, enzymatic and / or proteinaceous extracts may be isolated from one or more genetically modified organisms. The extracts are utilized to convert biomass into a product. Further provided are methods of converting biomass into products comprising: placing the genetically modified organism and / or enzymatic extracts thereof in fluid contact with polysaccharides, cellulose, lignocellulose, hemicellulose, lignin, starch, sugars, sugar oligomers, carbohydrates, complex carbohydrates, chitin, heteroxylans, glycosides, and / or xylan-, glucan-, galactan, or mannan-decorating groups.

A composite phase-change spinning dope contains soluet and solvent. Said solute is composed of the phase change material chosen from polyol, polyolefin, polyether and paraffin wax hydrocarbon, and the fibre-forming high polymer chosen from cellulose and its delivatives, chitin and its derivatives, polyacrylonitrile, and polyvinyl alcohol. Said solvent is the mixture of DMSO, keton, organic, distilled water or DMF and acetone. It can be used to prepare the superfine phase-change fibres by electrostatic spinning. Said superfine phase-change fibres can be used to prepare multifunctional protecting clothes.

The invention relates to an ecological agricultural drug and a preparing method compounded by a content of Chinese traditional herb plant insecticide and amino group oligosaccharide. The ecological agricultural drug is refined by blending and processing the plant gradients containing one or a plurality of insecticide and disinfecting components and the Chitosante raw materials and solutions which are extracted with the amino group oligosaccharide. The weight percentages of all components are respectively: five to thirty percent of plant materials, seventy to ninety five percent of Chitosante material, and the solvents are alcohol and water. When in blending and configuring process, additives are added; wherein, the additives are one or a plurality of the agents, such as an antiseptic agent, a dispersing agent, a surface active agent, a penetrant or an emulsifying agent. The plant materials are materials such as Sophora flavescens, tobacco, Indian chinaberry fruit, pyrethrum, climbing groundsel or Aztec marigold, etc., the invention has the beneficial effects of multifunction of insecticide and disinfection, anti disease, disease prevention; easy degradation of the product, no residues and extensive raw material source. The working process of the invention simplifies the processes of extraction, condensation and filter with low producing cost.

The invention discloses a biological compatibility surface coater and self-assembling coating method of planted medical apparatus, which is characterized by the following: the coater is prepared by self-assembling coating method layer by layer, which accelerates esoderma and resists thrombus constituted by two or more macromolecular materials with certain positive and negative load; the positive load material is chitose, chitin, polylysine and so on; the negative load material is disebrin, hyaluronic acid, alginic acid, polyamino acid and so on; the crosslinker and biological active factor or drug can be added to accelerate the growth of the cell; the coater satisfies the request of biologically medical transplantation.

A chitin-nano selenium compound for regulating immunity, delaying sanility and preventing cancer and cardiovascular disease is prepared from chitin (chitosan, water-soluble chitosan, or chitoligose) and Se compound through reaction.

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.

A new method to produce solid nanocrystalline cellulose (NCC) films containing patterns by differential heating of aqueous suspensions of NCC has been discovered. When acid-form NCC suspensions are dried by heating to temperatures above 50° C., darkening of the NCC can occur, while neutral forms of NCC can produce iridescent chiral nematic films by heating to temperatures up to 105° C. Placing materials of different thermal conductivity beneath the container containing an evaporating NCC suspension results in watermark-like patterns of different iridescent color imprinted within the film structure. Other colloidal rod-like particles can be employed in place of nanocrystalline cellulose (NCC), for example chitin or chitosan.

The invented healthy edible salt is prepared by mixing with sodium chloride, various amino acid, peptide substance, vitamin B family, polysaccharide, or chitin, antioxidant, nucleic acid seasoning, potassium chloride, calcium salt, magnesium salt, selenium salt, and potassium iodide. It can effectively prevent various diseases, also can prevent osteoporosis, cancer, diabetes, dysinsulinosis, lithiasis, coronary heart disease, senile dementia, bark farus etc. it also possesses the functions of antisenility, antifatigue, antidepression, improving immune power, promoting growth etc.

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.

The invention relates to a biology adsorbent and a preparation method thereof as well as application of the preparation method in heavy metal ion adsorption. The biology adsorbent is characterized in that hybrid blending material which has heavy metal ion adsorption capability is prepared by the capability of biological polymer such as microcrystalline cellulose, chitin, chitosan, etc. which can be dissolved in ionic liquid; the ionic liquid is chloridized 1-butyl-3-methyl imidazole salt and chloridized 1-allyl-3-methyl imidazole salt; the preparation of the adsorbent adopts two types: a drying type and a freeze-drying type; the ionic liquid used in the method can be recovered; the prepared adsorbent can be automatically degraded in environment; the preparation method and the prepared adsorbent in the method cause no secondary environmental pollution.

The invention provides water-soluble chitosan and derivatives thereof which are low in price and environment-friendly and used for replacing traditional PVDF (polyvinylidene fluoride) and CMC (carboxy methylated cellulose), and provides a novel environment-friendly binder of a lithium ion cell electrode material. According to the invention, the initial raw material of a chitosan binder is chitin, the chitin is extracted from crustacean such as carapace and crab shell, thus the source is broad, the cost is cheap, and the chitosan binder is green and has no pollution. The chitin is prepared into chitosan through deacetylation, and the chitosan further can be functionalized to be prepared into carboxylated chitosan, chitosan lactate and the like.

The invention discloses a preparation method of chitosan and particularly provides a preparation method of chitosan with high deacetylated degree and high molecular weight. The preparation method comprise the following steps of: firstly, preparing raw materials, removing calcium salt through acid treatment, removing protein through alkali treatment, and removing astacin to obtain chitin, and deacetylating the chitin to obtain the chitosan. Compared with the prior art, the preparation method has the advantages that the time on removing calcium and the astacin is shortened, and the molecular weight of the chitosan is improved. By using an alkali intermittent method for deacetylation by steps, the deacetylated degree of the prepared chitosan reaches 91-93 percent, and the viscometric average molecular weight of the prepared chitosan is 8.9*105-94*105.

The invention relates to a preparation method and application of an environment-friendly lithium ion battery, and in particular relates to a simulated mussel protein environment-friendly lithium ion battery adhesive. By simulating the molecular structure and action mechanism of mussel protein, histidine and dopamine are connected to polyacrylic acid, polymaleic acid, sodium alginate, sodium carboxymethylcellulose, carboxymethyl chitin, carboxymethyl chitosan, abietic acid and other natural or synthesized polymer to prepare a series of aqueous adhesives. The adhesive has a good adhering effect for various cathode materials such as carbon black, graphite and silicon. By adopting the adhesive provided by the invention, various properties of a lithium ion battery can be obviously improved, and especially cycle property of a silicon cathode material in a battery can be obviously improved.

In a first aspect, the present invention relates to a method for isolating cell wall derivatives from fungal or yeast biomass. According to this method, chitin polymers or chitin-glucan copolymers can be obtained. In another aspect, the invention relates to a method for preparing chitosan from chitin. The invention further relates to chitin polymers, chitin-glucan polymers and chitosan polymers obtainable by the methods according to the invention. Moreover, the invention relates to the use of chitin polymers, chitin-glucan copolymers or chitosan polymers obtainable by the method according to the present invention in medical, pharmaceutical, agricultural, nutraceutical, food, textile, cosmetic, industrial and / or environmental applications.

The invention relates to non-woven fabrics containing carboxymethyl cellulose fibers and a purpose of the non-woven fabrics containing the carboxymethyl cellulose fibers in a beauty mask substrate. The non-woven fabrics are composed of the carboxymethyl cellulose fibers or composed of the carboxymethyl cellulose fibers and any one kind of calcium alginate fibers, chitin fibers, chitosan fibers and modified chitosan fibers, wherein the content of the carboxymethyl cellulose fibers is 1%-95% of the weight of the non-woven fabrics. The invention further provides non-woven fabrics which are composed of the carboxymethyl cellulose fibers and any two kinds of the calcium alginate fibers, the chitin fibers, the chitosan fibers and the modified chitosan fibers, wherein the content of the carboxymethyl cellulose fibers is 1%-95% of the weight of the non-woven fabrics, and the weight ratio of the any two kinds of fibers is 1:8-8:1. The non-woven fabrics are strong in hygroscopicity, strong in moisture retention, strong in oxygen permeability, and have good biological compatibility, and are convenient to use, and safe and non-toxic.

The invention relates to a microbial agent for repairing petroleum-polluted saline alkali soil and a preparation method thereof, and belongs to the technical field of resource environment. According to a principle of microbial ecology, microbial community is extracted and screened from soils with high salt and alkali and high petroleum pollution to prepare the microbial agent, wherein obligate petroleum degrading bacteria can be sphingolipid bacteria, comamonas, chitin autophagy bacteria and bacillus. According to culture medium and soil environment experiments, the microbial agent can guarantee that the extracted microorganism can be survived in the soils with the salt content of 5,000mg / kg, and meanwhile, the degradation capability to the polluted soils with the petroleum content of 10-50g / kg can reach 80%. The microbial agent has the advantages of simple process, rich microorganisms, obvious dominant bacteria, good stability and capability of facilitating obligate petroleum degrading bacteria to adapt to a new pollution environment, increasing and improving the micro-ecological environment quality of the soils and avoiding secondary pollution to the environment, and can obviously improve the degradation efficiency of petroleum hydrocarbon in the saline alkali soil.

The present invention relates to one kind of biomedical material. The three-layered material includes one middle layer is cloth, net or non-woven fabric of absorbable polymer fiber, and upper and lowr porous layers of absorbable polymer material. The absorbable polymer fiber contains chitin, chitosan, their derivative or other absorbable polymer material, and the absorbable fiber reinforced multilayer film material may contains additive. The absorbable fiber reinforced multilayer film material is prepared through weaving cloth or with polymer fiber, painting polymer solution to the upper and lower sides of the cloth or net, and post-treatment. It has high strength and is suitable for use in preventing tissue adhesion.

The invention discloses an antisepsis and hydrophilous non-woven fabric that is coated and covered with fibroin and chitin; the invention further discloses a preparation method of the non-woven fabric, which comprises following steps: the non-woven fabric is doubly dipped and doubly rolled in a finishing solution that contains the fibroin and the chitin at the temperature of 20 to 40 DEG C, and then baked and fixed at the temperature less than 160 DEG C. By coating and covering the fibroin and the chitin onto the surface of the non-woven fabric, the non-woven fabric of the invention is provided with hydrophilous, bacteriostasis and sterilization effects without obvious influence to the appearance. The produced non-woven fabric can be used for disposable medical and health materials.

The present invention provides a method for the preparation of a myceliated cacao bean or other agricultural product. This method includes providing cacao beans or other agricultural substrate, optionally hydrating the cacao beans or other agricultural product, and optionally pasteurizing or sterilizing the cacao beans or other agricultural substrate to provide prepared cacao beans or other agricultural substrate, and a step of inoculating the prepared cacao beans or other agricultural substrate with a prepared fungal component and culturing the inoculated cacao beans or other agricultural substrate to prepare the myceliated product. The methods of the instant invention result in prepared cacao beans or other agricultural substrate having reduced levels of undesirable taste components, such as theobromine, catechin, epicatechin, gallic acid equivalents, and / or 2-methoxy-3-isopropylpyrazine, and increased levels of myceliation products, such as fungal β-glucans, chitin, proteins, glycoproteins, pyrazines and polysaccharides, relative to starting cacao beans or other agricultural substrate.

The invention discloses an application of injectable hydrogel in preparing intraocular filling materials. The application is characterized by being application of the injectable hydrogel as intraocular filling materials in vitreoretinal surgery as well as application of the injectable hydrogel as an intraocular drug carrier, wherein the injectable hydrogel is composed of two agents; the first agent is a glue solution containing oxidized polysaccharide; the second agent is a glue solution containing a chitin derivative and / or collagen; the two agents are separately contained in two injection tubes of a duplicate injector; the two glue solutions are simultaneously pushed and injected by the duplicate injector; in the pushing and injecting process, mixing and cross-linking are generated, namely, a dialdehyde group of the oxidized polysaccharide generates cross-linking reaction with amino of the chitin derivative and / or the collagen to form hydrogel with viscoelasticity. The constituents of the hydrogel are biomacromolecules different from chemical macromolecules, and a micromolecule cross-linking agent is not introduced, so that the biocompatibility is good, the hydrogel can be degraded and absorbed, toxic and side effects are avoided, and the safety is good.

The invention discloses a method for preparing carboxymethyl chitosan. The method comprises the following steps of by using chitin as a material, alkalifying the chitin, carrying out deacetylation reaction by using a cooling-heating alternative method to produce chitosan sodium salt; and then, carrying out carboxylation under an alkaline condition to obtain a carboxymethyl chitosan product. The method disclosed by the invention is simple in process and easy to control, so that a chain scission phenomenon appearing due to long-term high temperature reaction during deacetylation reaction of a chitosan molecular chain is avoided, thereby obtaining carboxymethyl chitosan which is high in viscosity, high in degree of substitution and better in water solubility; moreover, the method is suitable for large-scale industrial production.

The present invention relates to chitin oligose preparing process, and is especially enzyme generating fermentation process to degrade chitin colloid for preparing bioactive chitin oligose. The preparation process has simple technological path, effective inhibition of further degradation of bioactive chitin oligose, reuse of degrading enzyme and other advantages, and is suitable for industrial production. The preparation process includes: culturing Aeromonascaviae strain to obtain fermented liquid, centrifugally separating the fermented liquid to obtain enzyme supernatant; preparing chitin colloid; compounding chitin colloid buffer solution in an enzyme reactor and adding abacterial enzyme liquid for enzymolysis to obtain enzymolyzed chitin oligose liquid; four stages of membrane separation to obtain concentrate and spray drying to obtain bioactive chitin oligose product.