Class / Patent application number | Description | Number of patent applications / Date published |
536020000 | Chitin or derivative | 41 |
20080242850 | Method of producing chitosan scaffold having high tensile strength and chitosan scaffold produced using the method - Provided are a method of producing a porous chitosan scaffold, the method including: providing an aqueous acidic solution having chitosan and a solvent which does not dissolve the chitosan; and freeze-drying the aqueous acidic solution, wherein the solvent is selected from the group consisting of a C3-C8 aliphatic alcohol having one hydroxy group, ethylene glycol monoethylether, ethylene glycol monobutylether, dioxane, tetrahydrofuran, dimethylcarbonate, acetone and acetonitrile, and a chitosan scaffold produced using the method. | 10-02-2008 |
20090062519 | Chitosan Derivative and Method of Producing Same - Provided is a chitosan derivative having a high optical resolving power. Specifically provided is a chitosan derivative represented by the following Formula (I). | 03-05-2009 |
20090099347 | CHITOSAN PRODUCTION - The invention provides a method of producing chitosan using pressures greater than 0 PSIG. The invention also provides fungal chitosan compositions. | 04-16-2009 |
20090118480 | Novel Quaternary Polymers - The present invention relates to novel quaternized polymers, especially of chitin/chitosan type, and to carbohydrate polymers carrying quaternized ammonium groups, especially piperazinium groups. Such polymers are characterized i.a. by improved solubility characteristics. | 05-07-2009 |
20090149639 | A Simplified Method To Retrieve Chitosan From Acidic Solutions Thereof - Compositions of salted out chitosan polymer containing mixture of certain salting out salts as well as methods for making and using same are disclosed. Chitosan polymer preparations produced by such methods are substantially free of chitosanase, undesirable salts and excess acid and retain their physiological as well as biological and physico-chemical properties. The chitosan preparations of the present invention are valuable for the dispensing of biologically active chitosan in forms of drugs or food supplement. Most of these preparations easily dissolve in an aqueous acidic milieu such as the one of the stomach. | 06-11-2009 |
20100152430 | Process for preparing compounds of chitosan saccharified with aminosugar - A process for preparing compounds of chitosan saccharified with aminosugar, adopts chitosan derivatives, aminosugar derivatives and anhydride derivatives as raw materials to synthesize target products. The process comprises: covalently bonding an anhydride derivative as a bonding arm to an aminosugar derivative, so as to form a monosaccharide derivative having an end group of carboxyl; and then covalently bonding the monosaccharide derivative having an end group of carboxyl to a primary amino group of a chitosan derivative via the carboxyl, so as to form a compound of chitosan saccharified with aminosugar. | 06-17-2010 |
20100168407 | Quaternized Carboxymethyl Chitosan Derivatives and Preparation Method Thereof - The invention relates to a novel kind of chitosan derivative, specifically to quaternized carboxymethyl chitosand derivatives and preparation method. Chitosan with different molecular weight reacts with chloroactic acid give rise to carboxymethyl chitosan. After reaction of Schiff based, deoxidized and quaternized, quaternized carboxymethyl chitosan is obtained. This kind of chitosan derivative have better water-solubility and better antifungal activity, which can used in the fields of medicine and agriculture. | 07-01-2010 |
20100273994 | HYBRID COMPOUNDS CONTAINING POLYSACCHARIDE(S) AND AT LEAST ONE POLYOXYALKYLENE, METHOD FOR PREPARING SAME, AND APPLICATIONS THEREOF - The invention relates to novel hybrid compounds containing at least one polysaccharide entity (PS), such as guar, in which at least one hydroxyl function is substituted by at least one A polyoxyalkylene entity (PEG). The swivel Ro between the entity PS and the entity A is obtained by click chemistry and has the following formula (II.1) or (II.2), in which Z is a carbon or nitrogen atom. These hybrid compounds can be used as emulsifiers, particularly in cosmetics. | 10-28-2010 |
20110087012 | NUCLEIC ACID MOLECULES CODING FOR A PROTEIN WITH DEACETYLASE ACTIVITY, SAID PROTEIN, AND METHOD FOR THE PRODUCTION OF CHITOSAN - The invention relates to nucleic acid molecules selected from the group comprising: a) nucleic acid molecules that code for a form of the polypeptide with the derived amino acid sequence according to SEQ ID No. 3, said polypeptide having a deacetylase activity; b) nucleic acid molecules that comprise the nucleotide sequence according to SEQ ID No. 1 or SEQ ID No. 2 and that code for one form of said polypeptide; c) nucleic acid molecules that code for a fragment or a derivative of a polypeptide that is coded by a nucleic acid molecule according to a) or b), wherein one or more amino acid groups are conservatively substituted in said derivative as compared to said polypeptide, and wherein said fragment or derivative has a deacetylase activity; d) nucleic acid molecules that have a sequence identity of at least 95% with a nucleic acid molecule according to a) to c), and that code for a polypeptide with deacetylase activity; e) nucleic acid molecules that have a sequence identity of at least 70% with a nucleic acid molecule according to a) to c) and that code for a polypeptide with deacetylase activity; f) or the complementary string of a nucleic acid molecule according to a) to e). | 04-14-2011 |
20110196140 | Chitosan having tropomyosin content assessed by method of determining tropomyosin in chitosan - This invention provides a method capable of easily determining with high accuracy a protein in chitosan, said protein having a potential relevance to the development of an allergy, specifically tropomyosin and the content of the peptide. According to the method, tropomyosin is determined by immunoassay with the chitosan being in a state dissolved in an aqueous solution of an organic acid. The present invention also provides chitosan, which has a measurement value of the protein, specifically tropomyosin not higher than a predetermined value as measured by the determination method and is assessed to have only a low risk of inducing the allergy. | 08-11-2011 |
20110257381 | PHARMACEUTICAL COMPOSITION COMPRISING CHITO-OLIGOMERS - Compositions are provided comprising chito-oligomers obtainable from chitin, comprising oligomers of N-acetyl glucosamine (NAG) and glucosamine, wherein at least 50% of the oligomers have a chain length of about 2-50, and the degree of deacetylation of the oligomers is in the range of about 0-70%, preferably about 30-50%. The compositions are highly useful as pharmaceutical compositions for treatment of joint disorders such as rheumatoid arthritis and osteoarthritis. Also provided are methods for treatment of joint disorders and treatment against inflammatory activity. | 10-20-2011 |
20110282042 | OBTAINMENT OF CHITIN FROM SHRIMP WASTE BY MEANS OF MICROWAVE AND/OR AUTOCLAVING IN COMBINATION WITH ORGANIC ACIDS IN A SINGLE STAGE - This invention relates to the development of a new method of production of chitin through employment of a microwave process under pressure and/or autoclave with organic acids. This new method eliminates salts and proteins in a single stage and reduces contamination levels. The chitin obtained has application in the areas of medicine, foods, cosmetics and construction, among others. | 11-17-2011 |
20120004401 | COMPOSITIONS COMPRISING LIPOCHITOOLIGOSACCHARIDES - Compositions containing lipochitooligosaccharides are disclosed. The compositions can be used to treat the roots, leaves, or seeds of plants and can be applied in the soil, to plant foliage, or as a seed coating | 01-05-2012 |
20120022242 | METHOD FOR PRODUCING AN ELONGATE POLYSACCHARIDE ELEMENT, IN PARTICULAR A CHITOSAN THREAD, AND POLYSACCCHARIDE THREAD OBTAINED - The invention relates to a method for producing an elongate polysaccharide element, in particular a chitosan thread, comprising an operation of extruding an extrusible solution of said polysaccharide through an extrusion die and an operation of coagulating the extruded solution. The extrusible solution is a hydroalcoholic solution containing an alcohol that does not form an azeotrope with water and which has a boiling point of more than 150° C. at atmospheric pressure. The coagulation operation includes a step of evaporating the water, preferably over the alcohol, producing a gelled extruded elongate element in the form of a mainly alcoholic gel, in particular by subjecting the extruded solution to a hot air flow. At least one operation of eliminating the alcohol contained in said gel makes it possible to obtain the elongate polysaccharide element. The chitosan thread has a crystalline structure corresponding to the anhydrous allomorph and a rupture stress of at least 150 MPa after being immersed in demineralised water for fifteen hours. The apparatus ( | 01-26-2012 |
20120178916 | Polymer Support - The invention provides a polymer support characterised in that the polymer is 6-amino 6-deoxy chitosan. Metal-immobilised 6-amino 6-deoxy chitosan is further provided, more particularly including one of Pd, Pt, Ru, Rh Ir, Os, Mn, Ni, Co and Fe in all their possible oxidation states complexed to 6-amino 6-deoxy chitosan through a Schiff-base ligand. | 07-12-2012 |
20120238735 | Monoconjugated Chitosans as Delivery Agents for Small Interfering Nucleic Acids - Conjugates are provided, an exemplary conjugating having a single water-soluble, non-peptidic polymer, such as a poly(ethylene oxide), attached to a chitosan. Complexes of small interfering nucleic acids formed with such conjugates as well as small interfering nucleic acids attached to such conjugates are also provided. Related methods, intermediates, and compositions are also provided. | 09-20-2012 |
20120245336 | COMPOSITIONS CONTAINING RECYCLABLE IONIC LIQUIDS FOR USE IN BIOMASS PROCESSING - Compositions containing biomass, an ionic liquid, and an amide are described herein. Methods of their preparation and use in extracting and processing biomass are also described herein. Further described herein are films and fibers prepared from the compositions. Methods of recovering the ionic liquids used to process the biomass are also provided. | 09-27-2012 |
20130079504 | POLYSACCHARIDE GEL AND PROCESS FOR PRODUCING SAME - A mixture of a raw material poorly water-soluble polysaccharide or derivative thereof in an ionic liquid-containing solvent is exposed to radiation. Accordingly, a polysaccharide gel producing process is provided that can produce a gel without performing a special pretreatment for the raw material. | 03-28-2013 |
20130197205 | CHITOSAN COVALENTLY LINKED WITH SMALL MOLECULE INTEGRIN ANTAGONIST FOR TARGETED DELIVERY - The invention relates to the chitosan polymer derivatives of formula I: | 08-01-2013 |
20130331557 | CHITOSAN MANUFACTURING PROCESS - A method for producing chitosan from naturally occurring chitin-containing raw material, such as crustacean shells, includes an optional pretreatment step to remove non-chitin rich organic material for example, shrimp flesh, from the raw material, e.g., shrimp shells. The optional pretreatment is followed by a demineralization step utilizing a mild hydrochloric acid solution and a deproteination step utilizing a mild sodium hydroxide solution. The deproteination step is followed by a deacetylation step to remove the acetyl group from N-acetylglucosamine (chitin) to form an amine group, yielding d-glucosamine (chitosan). Each step is followed by a washing step and the product is dried, preferably at a temperature not in excess of about 65° C. Known purification and grinding steps may also be used to produce the final chitosan product. The process is carried out in equipment comprising a series of substantially identical or similar tanks ( | 12-12-2013 |
20140100361 | EXTRACTION OF CHITINS IN A SINGLE STEP BY ENZYMATIC HYDROLYSIS IN AN ACID MEDIUM - A method of enzymatic extraction of chitin is realized in a single step wherein the chitin is obtained by enzymatic hydrolysis of raw material constituted by animal biomass including chitin, the enzymatic hydrolysis using an enzyme active in acid medium. Also disclosed is a process of optimization of the method of enzymatic extraction of chitin, as well as the chitin susceptible to be obtained by the method of enzymatic extraction. | 04-10-2014 |
20140107329 | N,N,N-TRILAKYLAMINOPOLYMERS, METHODS OF THEIR PREPARATION AND USES THEREOF - There is provided a method for the preparation of an N,N,N-trialkylaminopolymer having one or more unsubstituted heteroatoms different from nitrogen atom. The method comprises a first step of alkylating an aminopolymer to produce an N,N-dialkylaminopolymer, wherein substantially no N,N,N-trialkylaminopolymer is produced; and a second step of alkylating the N,N-diaminopolymer to produce the N,N,N-trialkylaminopolymer. The N,N,N-trialkylaminopolymer is produced with a satisfactory degree of quaternization and with only a low percentage of the unsubstituted heteroatoms alkylated. The N,N,N-trialkylaminopolymer can be an N,N,N-trialkylaminopolysaccharide or an N,N,N-trialkylchitosan such as N,N,N-trimethylchitosan. | 04-17-2014 |
20140114055 | MULTIFUNCTIONAL CHITOSAN GRAFTED SURFACES AND USES THEREOF - The invention relates to a multifunctional chitosan grafted surface. Specifically, the invention relates to a chitosan modified with a quaternary ammonium salt (CH-Q) grafted surface that provides various functional properties, including stability (pH 3-9) and unique pH dependent swelling and antibacterial properties. | 04-24-2014 |
20140256925 | COMPOSITE MATERIALS - A composite material is formed by combining an expandable polymer having a charge with another polymer having an opposite charge to produce. In particular, the composite material can be prepared by combining the polymers with a medium such as and water, and expanding the mixture using a treatment that expands the mixture to produce, for example, insoluble porous foam-like composites. | 09-11-2014 |
20140275507 | PROCESSES FOR ISOLATING CHITIN AND CHITOSAN FROM FUNGAL BIOMASS - Methods of extracting chitin and chitosan from fungal biomass using a solution of one or more ammonia compounds, amines, and/or alkaline silicate compounds. The solution dissolves and extracts amino acids, fatty acids and other carbohydrates from the fungal cells leaving chitin and/or chitosan, and the extractant may be recovered from the liquid by simple phase changes such as heating or cooling, dissociation into volatile components, distillation and/or solidification and separation of immiscible extractants. Further lipid removal may be achieved with one or more organic solvents, which may also be recovered by distillation. | 09-18-2014 |
20140303361 | PROCESSES FOR CHEMICAL SYNTHESIS OF LIPOCHITOOLIGOSACCHARIDES - Processes for the synthesis of lipochitooligosaccharides were developed. A fully acylated oligoglucosamine precursor is prepared and reacted with a glucosamine monomer that has an amine protecting phthaloyl group. With removal of the phthaloyl group, a fatty acid may be added on the terminal glucosamine unit, forming a lipochitooligosaccharide. The processes can be adapted for use on a commercial scale. | 10-09-2014 |
20140309410 | AMINE GRAFTED CHITOSAN NANOFIBER, METHOD FOR PREPARATION THEREOF AND ITS USE IN HEAVY METAL ADSORPTION - The present invention relates to an amine grafted chitosan nanofiber having the formula (I) | 10-16-2014 |
20150011742 | ELECTROCHEMICAL SYNTHESIS OF CHLORO-CHITOSAN - The present disclosure provides methods for producing chitosan derivatives and the derivatives formed by these methods. The processes of the present disclosure utilize electrochemical methods to functionalize and/or modify amine and/or hydroxyl groups present on chitosan, to form new derivatives. In embodiments, a chloro-chitosan derivative may be prepared. The altered cationic affinity of these derivatives make them excellent candidates for biomedical applications, including pharmaceuticals, as well as food applications. | 01-08-2015 |
20150291705 | GLYCOL CHITOSAN DERIVATIVE HAVING HYDROPHOBIC SUBSTITUENT, METHOD FOR PREPARING SAME AND USE OF SAME - The present invention is directed to a glycol chitosan derivative having a hydrophobic substituent, to a method for preparing the glycol chitosan derivative, and to a use of the glycol chitosan derivative. In particular, the glycol chitosan derivative has a structure where an amine group at the 2-position is partially substituted with an acetyl group and a hydrophobic group R and is utilized in medical, bio, electric and other fields, by virtue of its thermo-sensitive characteristics of causing sol-gel transition at a predetermined temperature. | 10-15-2015 |
20150327553 | COMPOSITION AND METHOD OF MAKING WATER SOLUBLE CHITOSAN POLYMER AND COMPOSITE PARTICLES - Embodiments of the present disclosure provide for water-soluble chitosan particles, methods of making water-soluble chitosan particles, and methods of using water-soluble chitosan particles. In an embodiment, the composition of water-soluble chitosan particles can be used in drug delivery, tissue engineering, bioimaging, biosensing, catalysis, and antimicrobial applications. | 11-19-2015 |
20150361121 | METHOD OF PREPARING CHITIN NANOFIBERS - The present invention discloses a method of preparing chitin nanofibers. By increasing the saturated moisture content of chitin and instantaneously releasing the pressure under a high temperature and high pressure environment, water within the chitin micro-particles is quickly evaporated and thus generated a high vapor pressure. Consequently, the interaction in chitin fiber is broken, and therefore the chitin nanofibers are obtained. | 12-17-2015 |
20160032493 | PREPARATION METHOD OF POLYSACCHARIDE FIBER - A preparation method of a polysaccharide fiber is provided. The method includes the following steps. First, a polysaccharide material is provided. Next, the polysaccharide material is mixed with an ionic liquid to form a polysaccharide solution. Then, the polysaccharide solution is mixed with a forming liquid to form a formed polysaccharide article. Next, a homogenization treatment is performed on the formed polysaccharide article to form a homogeneous polysaccharide article. Then, the homogeneous polysaccharide article is dried to form a polysaccharide fiber. | 02-04-2016 |
20160060362 | CHITOSAN-DERIVATIVE COMPOUNDS AND METHODS OF CONTROLLING MICROBIAL POPULATIONS - The present invention is directed to chitosan-derivative compounds and structures, methods of making chitosan-derivative compounds and methods for controlling, inhibiting and enhancing microbial populations in a variety of environments. The present invention is also directed to the control, inhibition and enhancement of microbial populations in animals, particularly humans. The microbial populations include bacteria, viruses and other pathogens where control of microbial populations are a necessity. The chitosan-derivative compounds of the present invention include chitosan-arginine compounds, related chitosan-L/D unnatural amino acid compounds, chitosan-acid amine compounds, chitosan-L/D natural amino acid derivative compounds, co-derivatives of the chitosan-derivative compounds, salts of the chitosan derivative compounds, and chitosan-guanidine compounds. | 03-03-2016 |
20160060363 | CHEMICAL PULPING OF CHITINOUS BIOMASS FOR CHITIN - Methods of separating chitin from a chitinous biomass that contains chitin and non-chitin material by a chemical pulping process that uses a protic ionic liquid or a composition comprising acid and base precursor molecules are described. Also described are methods for purifying chemically pulped chitin resulting in a pure chitin material with a high molecular weight and a higher degree of acetylation in comparison to traditional pulping and ionic liquid extraction based methods. | 03-03-2016 |
20160121021 | COMPOSITION, PREPARATION, AND USE OF CHITOSAN SHARDS FOR BIOMEDICAL APPLICATIONS - A thin chitosan-based material can be used for biomedical applications. The chitosan has been treated in a nitrogen field by applying energy to ionize nitrogen in and around the chitosan material. A single or multiple such treatments may be employed. For example, the chitosan material may be irradiated under nitrogen using γ-irradiation, treated under a nitrogen plasma, or both. A thin chitosan material can be readily treated by surface modifying treatments such as irradiating under nitrogen using γ-irradiation, treating under a nitrogen plasma, or both. | 05-05-2016 |
20160122443 | PROCESS FOR THE REMOVAL OF CONTAMINATION FROM A RAW MATERIAL - The present invention relates to a process for the removal of contamination from a raw material comprising a desirable material, such as chitin and/or chitosan. The process comprises mixing a raw material with a liquid, wherein the raw material comprises at least one contaminant and at least one desirable material, and wherein the at least one desirable material is capable of absorbing the liquid; and allowing the at least one contaminant and at least one desirable material to separate in a separation container. | 05-05-2016 |
20160122444 | CHITIN-GLUCAN COMPLEXES AND METHOD FOR THE PREPARATION THEREOF FROM CHITIN-RICH BIOMATERIALS - The present invention is related to a novel process for the preparation of chitin-glucan or chitosan-glucan complexes from raw materials of biological origin rich in chitin, such as mycelium of micro-fungi and exoskeletons of crustaceans, where the product obtained presents a chitin proportion between 19 and 55% and average molecular weight between 1.7 and 155 kDa. | 05-05-2016 |
20160159933 | CHITOSAN MANUFACTURING PROCESS - A method for producing chitosan from naturally occurring chitin-containing raw material, such as crustacean shells, includes an optional pretreatment step to remove non-chitin rich organic material for example, shrimp flesh, from the raw material, e.g., shrimp shells. The optional pretreatment is followed by a demineralization step utilizing a mild hydrochloric acid solution and a deproteination step utilizing a mild sodium hydroxide solution. The deproteination step is followed by a deacetylation step to remove the acetyl group from N-acetylglucosamine (chitin) to form an amine group, yielding d-glucosamine (chitosan). Each step is followed by a washing step and the product is dried, preferably at a temperature not in excess of about 65° C. Known purification and grinding steps may also be used to produce the final chitosan product. The process is carried out in equipment comprising a series of substantially identical or similar tanks ( | 06-09-2016 |
20160159934 | USES OF CERTAIN PLATINOID ACCUMULATING PLANTS FOR USE IN ORGANIC CHEMICAL REACTIONS - A composition derived from the acid treatment of ashes obtained after heat treatment of selected plants or plant material is provided. The selected plants accumulate metal from the platinum group (platinoids). The compositions can be used to produce catalysts for performing various organic synthesis reactions. | 06-09-2016 |
20160168276 | PROCESS FOR THE REMOVAL OF ENDOTOXINS TO PRODUCE MEDICAL QUALITY CHITOSAN AND OTHER POLYSACCHARIDES | 06-16-2016 |
20160168277 | PROCESS FOR PRODUCING LOW ENDOTOXIN CHITOSAN | 06-16-2016 |