53 results about "Carbohydrate derivative" patented technology

An antimicrobial composition, including a synergistic combination of three or more agents as an active ingredient. Each of the three or more potentiating agents can be selected from the following types of compounds: sequestering agents, carbohydrates and carbohydrate derivatives, terpenes / terpenoids, amines and amine derivatives, plant-derived oils, sulfonates, phenols, fatty acids, dibenzofuran derivatives, organo isothiocyanates, quaternary ammonium compounds, peroxides and peroxide donors, and macrolide polyenes. At least two of the three or more potentiating agents are not of the same type of compound. The antimicrobial composition can have strong antimicrobial efficacy in control of microorganisms having resistance to currently used antimicrobials.

An antimicrobial composition, including a synergistic combination of three or more agents as an active ingredient. Each of the three or more potentiating agents can be selected from the following types of compounds: sequestering agents, carbohydrates and carbohydrate derivatives, terpenes / terpenoids, amines and amine derivatives, plant-derived oils, sulfonates, phenols, fatty acids, dibenzofuran derivatives, organo isothiocyanates, quaternary ammonium compounds, peroxides and peroxide donors, and macrolide polyenes. At least two of the three or more potentiating agents are not of the same type of compound. The antimicrobial composition can have strong antimicrobial efficacy in control of microorganisms having resistance to currently used antimicrobials.

The invention relates to organosilicon compounds modified with mono- or polyhydroxylated hydrocarbon radicals or carbohydrate derivatives and containing units of the general formula (I)in whichR is a substituted or unsubstituted hydrocarbon radical,X is chlorine, or an alkoxy radical,A is a hydroxylated hydrocarbon, preferably a mono-, oligo-, or polysaccharide, and the sum of a, b, and c<=4. The organosilicon compounds are interface-active.

A moldable fibrous product, includes foam-formed fibrous material selected from fibrous webs, paper webs, board webs, or sheets cut from any of the webs, at least one polymer selected from carbohydrate derivatives, polylactic acid, polyurethane and polyolefins impregnated in the web, and from 0.001 to 0.1% by weight of at least one foaming agent.

A method for the synthesis of a compound of formula (1) or a salt thereof, wherein A is a carbohydrate linker which is a lactosyl moiety or which consists of a lactosyl moiety and at least one monosaccharide unit selected from the group consisting of: glucose, galactose, N-acetylglucosamine, fucose and N-acetyl neuraminic acid; and wherein R1 is one of the following anomeric protecting groups: a) -OR2, wherein R2 is a protecting group removable by catalytic hydrogenolysis; b) -SR3, wherein R3 is an optionally substituted alkyl, an optionally substituted aryl or an optionally substituted benzyl; c) -NH- C(R")=C(R')2, wherein each R' independently is one of the following electron withdrawing groups: -CN, -COOH, -COO-alkyl, -CO-alkyl, -CONH2, -CONH- alkyl or -CON(alkyl)2, or wherein the two R'-groups are linked together and form -CO-(CH2)2-4-CO- and thus form, together with the carbon atom to which they are attached, a 5-7 membered cycloalkan-1,3-dione, in which dione any of the methylene groups is optionally substituted with 1 or 2 alkyl groups, and R" is H or alkyl, in which a fucosyl donor of formula (2) wherein X is selected from the group consisting of: a guanosine diphosphatyl moiety, a lactose moiety, azide, fluoride, optionally substituted phenoxy-, optionally substituted pyridinyloxy-, optionally substituted 3-oxo-furanyloxy- of formula (A), optionally substituted 1,3,5-triazinyloxy- of formula (B), 4-methylumbelliferyloxy-group of formula (C), and a group of formula (D) wherein Ra is independently H or alkyl, or two vicinal Ra groups represent a=C(Rb)2 group, wherein Rb is independently H or alkyl, Rc is independently selected from the group consisting of alkoxy, amino, alkylamino and dialkylamino, Rd is selected from the group consisting of H, alkyl and -C(=O)Re, wherein Re is OH, alkoxy, amino, alkylamino, dialkylamino, hydrazino, alkylhydrazino, dialkylhydrazino or trialkylhydrazino, is reacted with an acceptor of formula H-A-R1 or a salt thereof, wherein A and R1 are as defined above, under the catalysis of an enzyme capable of transferring fucose. A compound of formula 1', its use in manufacture of human milk oligosaccharides, a method of manufacture of human milk oligosaccharides, and a fucosyl donor are also provided.

The present invention relates to the use of a non-reducing carbohydrate or carbohydrate derivative and at least one agent which inhibits dimer formation in a freeze-dried composition comprising at least one peptide that contains a free cysteine residue, to provide a freeze-dried composition with improved long-term storage stability.

The invention relates to new etherified carbohydrate derivatives, a method for production thereof, pharmaceutical compositions containing the same and use for the production of a pharmaceutical preparation for treatment of conditions in which macrophages are stimulated or down-regulated. In an embodiment of the present invention, said carbohydrate derivatives comprise general formula (I) wherein n is an integer in the range from 3 to 98, and each group R independently represents a hydrogen atom or an aliphatic, saturated or unsaturated hydrocarbon chain having from 7 to 30 carbon atoms.

Provide is a cellulose acylate film, of which the environmental humidity-dependent retardation change is small and which, when stuck to a polarizer and used in high-temperature and high-humidity environments, is effective for preventing the polarizing element from being deteriorated. A cellulose acylate film, which contains a hydrogen-bonding compound satisfying the following requirements (A) to (C), and at least one hydrophobizing agent selected from a polyalcohol ester-base hydrophobizing agent, a polycondensate ester-base hydrophobizing agent and a carbohydrate derivative-base hydrophobizing agent: (A) the compound has both a hydrogen-bonding donor part and a hydrogen-bonding acceptor part in one molecule, (B) the value computed by dividing the molecular weight of the compound by the total number of the hydrogen-bonding donor number and the hydrogen-bonding acceptor number in the compound is from 30 to 65, and (C) the total number of the aromatic ring structures in the compound is from 1 to 3.

The invention discloses a making method of rhodium complex compound of imidazoline and coordination of carbohydrate derivant, which comprises the following steps: reacting N,N'-di (methyl 3-deoxygenation-4, 6-O-benzyl crossing base-alpha-D-altronic pyran glycoside-3-base) ethanediamine and 40 ml ammonium chloride in the triethoxymethane for 3-4. 2h; cooling; filtering; washing through petroleum ether to obtain chiral imidazoline ligand; blending the ligand and [RhCl(COD)]2 and NaOtBu to react in the 20ml THF for 48h at 45 deg. c; filtering; purifying through column chromatography to obtain the product as high-property catalyst.

Provided is an optical film, which is capable of fully keeping close cooperation between the active energy radial solidifying layer and the acylation cellulose membrane even exposed to sunlight for a long while. Even as polaroid protective film assembled to Polaroid and used for a long time at a high temperature, the optical film can still keep excellent polarization performance. Moreover, the thickness of the optical film is reduced. In addition, the invention also provides a polaroid and a liquid crystal display apparatus employing the optical film. The optical film of the invention is provided with an acylation cellulose membrane and an active energy radial solidifying layer. The acylation cellulose membrane comprises at least one plasticizer selected from the group consisting of a carbohydrate ramification, polyol ester, and contracting polyester. Moreover, the active energy radial solidifying layer comprises hindered amine compound.

The invention belongs to the field of chemical pharmaceutical technology, particularly relates to drug design of the traditional Chinese medicine extract shikonin serving as a lead compound and related research of anti-tumor activity. Carbohydrates are led into the framework molecule of the shikonin by means of chemical synthesis so as to obtain carbohydrate derivative with novel structure, and the research of in-vitro anti-tumor activity shows that the inhibition activity of the glycosyl shikonin on tumor cell A549 is obviously better than that of NCI-H460. From the activity result, the glycosyl shikonin can be prepared into anti-tumor medicament with high effect and low toxicity.

A method for the synthesis of a fucooligosaccharide glycosides by reacting a fucosyl donor with H-A-R1 or a salt thereof, wherein A and R1 are as defined herein, under the catalysis of an enzyme capable of transferring fucose is provided. The fucooligosaccharid glycoside compounds, or derivatives thereof, their use in the manufacture of human milk oligosaccharides, and a method of manufacture of human milk oligosaccharides, are also provided.

A cellulose acylate film containing a cellulose acylate and a carbohydrate derivative satisfying that the Clog P value thereof is from 0 to 5.5 and the maximum value of the molar extinction coefficient thereof in a wavelength range of from 230 nm to 700 nm is at most 50×103, wherein the hydroxyl groups in the carbohydrate derivative are substituted with at least two types of substituents and at least one of the substituents has at least one aromatic ring, and wherein the carbohydrate derivative is contained in an amount of from 1 part by mass to 30 parts by mass relative to 100 parts by mass of the cellulose acylate therein has a low water content, capable of preventing the deterioration of polarizer when it is stuck to polarizer and aged in high-temperature and high-humidity environments, having good optical characteristics expressibility and having a low haze.

A binder for coating slips is disclosed comprising a first binder component, the first binder component providing the solids content of gelatine in the binder, one or more father binder components which are selected from the group consisting of vinyl alcohol polymers vinyl alcohol copolymers, carbohydrates, and carbohydrate derivatives, the one or more further binder components providing, summed together, the solids content of the one or more further binder components in the binder; the solids content of the gelatine in the binder being greater than the solids content of the one or more further binder components in the binder.

A composition comprising at least two glycoalkaloids of formula I: wherein: either one or both of the dotted lines represents a double bond, and the other a single bond, or both represent single bonds; A: represents a radical selected from the following radicals of general formulae (II) to (V): each of R1 is a radical separately selected from the group consisting of hydrogen, amino, oxo and OR4; each of R2 is a radical separately selected from the group consisting of hydrogen, amino and OR4; each of R3 is a radical separately selected from the group consisting of hydrogen, carbohydrate and a carbohydrate derivative; “X” is a radical selected from the group comprising —CH2—, —O— and —NH2—; and wherein the compound includes at least one R4 group that is a carbohydrate or a derivative thereof selected from the group comprising glyceric aldehyde, glycerose, erythrose, threose, ribose, arabinose, xylose, lyxose, altrose, allose, gulose, mannose, glucose, idose, galactose, talose, rhamnose, dihydroxyactone, erythrulose, ribulose, xylulose, psicose, fructose, sorbose, tagatose, and other hexoses, heptoses, octoses, nanoses, decoses, deoxysugars with branched chains, (e.g. apiose, hamamelose, streptose, cordycepose, mycarose and cladinose), compounds wherein the aldehyde, ketone or hydroxyl groups have been substituted (e.g. N-acetyl, acetyl, methyl, replacement of CH2OH), sugar alcohols, sugar acids, benzimidazoles, the enol salts of the carbohydrates, saccharinic acids, sugar phosphates; wherein the ratio of said glycoalkaloids is between 6:1 and 1:6 and on the proviso that when the glycoalkaloids are solamargine and solasonine and they are present in a 1:1 ratio the solamargine and solasonine are isolated.

A method of oxidising carbohydrates and / or carbohydrate derivatives having primary alcohol groups comprising contacting a reaction medium containing said carbohydrates and / or carbohydrate derivatives with a nitroxy radical mediator and a peroxidase enzyme, characterised in that the initial reaction medium contains at least 10% by weight carbohydrates and / or carbohydrate derivatives, in that the peroxidase enzyme is an oilseed peroxidase and in that a hydroperoxide and an alkali compound are gradually added to the reaction medium such that its pH is maintained at between 3.5 and 10.0 (pH-Stat); use of said method in a process for producing gluconic acid, glucaric acid and / or D-glucuronolactone.

The invention discloses a method for regenerating reducing sugar from a hydrazine chromophoric reagent derivative of the reducing sugar. The method comprises the following steps: 1) taking the reducing sugar, adding a hydrazine chromophoric reagent with an amount of a mole number being no less than 10 times of the reducing sugar, then dissolving the materials in a weak acid aqueous solution of anorganic solvent, uniformly shaking the materials, heating the materials for a reaction, after the reaction is completed, performing condensation drying; 2) adding water in a sample obtained in the step 1) for dissolving, then using the organic solvent for extraction, or passing the material through a C18 column and / or a PGC solid-phase extraction column for purification; 3) separating the sample obtained in the step 2) through a chromatography; and 4) separating a single carbohydrate derivative collected in the step 3) for drying, then dissolving the material in the weak acid aqueous solution,removing a hydrazine chromophoric reagent tag under heating condition, and regenerating a reducing sugar chain. The method has the beneficial effects that the operation is simple, the reaction is mild and fast, and the generated reducing sugar chain monomer has no generated side reaction products, and the recovery rate is high.

The invention relates to a catalyst used by a nucleoside preparation technology by using a solvent-free melting method, which is characterized in that the catalyst takes acidic or meta-acidic ionic liquid as the catalyst; the ionic liquid catalyst is quaternary ammonium salt type ionic liquid at constant temperature. The invention also discloses a nucleoside preparation technology utilizing the catalyst by using a solvent-free melting method, which is characterized in that carbohydrate derivatives and purines or miazines protected by silicon armour and other heterocyclic compounds of the same molar weights are heated to a melting state to prepare the corresponding nucleoside under the condition that the ionic liquid catalyst is used for catalysis. The invention has the advantages that the raw materials of the catalyst have wide sources and are easy acquired; the catalyst is taken as the technological catalyst for preparing various nucleosides by utilizing the solvent-free melting method, the reaction substrate is easily converted into the melting state because the catalyst is liquid at the constant temperature and has high boiling point; the heating temperature is low; the reaction is stable; and the carbonization degree of reaction mixture is low to be beneficial to the enhancement of the yield.

The invention provides a method of oxidising carbohydrates and / or carbohydrate derivatives having primary alcohol groups comprising contacting a reaction medium containing said carbohydrates and / or carbohydrate derivatives with a nitroxy radical mediator and a peroxidase enzyme, characterised in that the initial reaction medium contains at least 10% by weight carbohydrates and / or carbohydrate derivatives, in that the peroxidase enzyme is an oilseed peroxidase and in that a hydroperoxide and an alkali compound are gradually added to the reaction medium such that its pH is maintained at between 3.5 and 10.0 (pH-Stat); the invention also relates to the use of said method in a process for producing gluconic acid, glucaric acid and / or D-glucuronolactone.

The invention discloses a carbohydrate derivant, complex compound and making method with coordination Pt complex compound of cancer resistant, which is characterized by the following: reacting primary diamine 2,3-anhydride-alpha-D-manna pyran glycoside to obtain the diamine; making the diamine and Pt salt to obtain the Pt complex compound of coordinated nitrogen atom; making single Pt complex compound coordinated by diamine and diPt complex compound coordinated by bridged diamine and alkali additional salt; fitting for the drug composition to treat cancer.

The invention discloses a preparation method of a carbohydrate derivative adhesive, which comprises the following steps: (1) preparing an adhesive: adding acetone, water, a catalyst and a carbohydrate-containing raw material into a reaction kettle for reaction, after the reaction is completed, distilling to remove acetone in the mixture to obtain a solid residue, and then extracting the solid residue by using an organic solvent to obtain the carbohydrate derivative adhesive; and separating the extract liquor, and removing the organic solvent in the extract liquor to obtain the adhesive. And (2) curing the adhesive: mixing the adhesive, a curing agent, a solvent and an auxiliary agent to obtain the formaldehyde-free bio-based adhesive which can be directly applied to hot-pressing curing, namely the carbohydrate derived adhesive. According to the invention, the defects of large difference of raw material structures and properties, unstable adhesive performance and the like in the traditional method can be overcome, and the green biomass-based formaldehyde-free adhesive with stable performance and low dependency on fossil resources can be prepared.

Disclosed are super-hydrophobic, super oleophilic membranes comprising a metal mesh comprising copper, a coating comprising a carbohydrate derivative, wherein the carbohydrate derivative is covalently or ionically bonded to a metal mesh surface and methods of preparation thereof. The disclosed membranes are useful for wastewater treatment in the oil industry, in particular for oil / water separation processes.