165 results about "Periodic acid" patented technology

An immunogenic composition having 13 distinct polysaccharide-protein conjugates and optionally, an aluminum-based adjuvant, is described. Each conjugate contains a capsular polysaccharide prepared from a different serotype of Streptococcus pneumoniae (1, 3, 4, 5, 6A, 6B, 7F, 9V, 14, 18C, 19A, 19F and 23F) conjugated to a carrier protein. The immunogenic composition, formulated as a vaccine, increases coverage against pneumococcal disease in infants and young children globally, and provides coverage for serotypes 6A and 19A that is not dependent on the limitations of serogroup cross-protection. Also described is a method for making an immunogenic conjugate comprising Streptococcus pneumoniae serotype 3 polysaccharide covalently linked to a carrier protein, the method including periodic acid oxidation of the polysaccharide in the presence of bivalent cations.

This invention relates to compositions and methods for removing overfilled substrates, preferably at a relatively high removal rates. Advantageously, a composition according to the invention can contain an oxidizer, preferably a per-type oxidizer such as a peroxide, periodic acid, and peracetic acid, and may also optionally contain an abrasive.

The polishing slurry is useful for removing ruthenium layers from patterned semiconductor substrates in the presence of at least one nonferrous interconnect metal and a dielectric. The polishing slurry includes 0.001 to 10 weight percent periodic acid or salt, at least 0.0001 weight percent inhibitor for reducing removal rate of the nonferrous interconnect metals, 0.00001 to 5 weight percent organic additive for reducing dielectric removal rate, the organic additive being selected from at least one of water soluble polymers and surfactants, the organic additive containing an ethylene oxide group or an amide group, 0.1 to 50 weight percent abrasive and balance water; and the slurry having a pH of greater than 8 to 12.

A slurry for removing metals, useful in the manufacture of integrated circuits generally, and for the chemical mechanical polishing of noble metals particularly, may be formed by combining periodic acid, an abrasive, and a buffer system, wherein the pH of the slurry is between about 4 to about 8.

Compositions comprising oxidized dextran compounds are disclosed herein. Oxidized dextran compounds are produced by contacting dextran under aqueous conditions with at least one N-oxoammonium salt, at least one periodate compound, and / or at least one peroxide compound.

The present invention relates to methods and compositions for treating a surface of a substrate by foam technology that includes at least one treatment chemical. The invention more particularly relates to the removal of undesired matter from the surface of substrates with small features, where such undesired matter may comprise organic and inorganic compounds such as particles, films from photoresist material, and traces of any other impurities such as metals deposited during planarization or etching. A method according to the present invention for treating a surface of a substrate comprises generating a foam from a liquid composition, wherein the liquid composition comprises a gas; a surfactant; and at least one component selected from the group consisting of a fluoride, a hydroxylamine, an amine and periodic acid; contacting the foam with the surface of a substrate; and, removing the undesired matter from the surface of the substrate.

The invention belongs to the technical field of polymer materials and relates to a recyclable high-strength biological packaging material which is used as a basic material for making various packaging products. The recyclable high-strength biological packaging material comprises the following components in part by mass: 50 to 70 parts of starch, 10 to 30 parts of polyethylene, 5 to 15 parts of plant fibers, and 1 to 5 parts of additive. The starch comprises natural starch or chemical-modified starch, such as dialdehyde starch which is oxidized starch obtained by oxidizing the starch by using periodic acid and salt; the plant fibers are made from rice husk, rice straw, wheat straw, corn stalks, cotton stalks, wood dust and bamboo dust and other crop straw or plant stems; and the additive is one or more of a foaming agent, a plasticizing agent, a stabilizer, a filler, a coupling agent and a moisture proof agent. The technical process of the method is simple, the principle of the method is safe and reliable, the raw materials are readily available, and the practical value of the method is high; and the prepared material has high strength, and can be recycled and degraded.

The invention discloses a polishing solution for processing an ultra-smooth bearing steel surface and application thereof. The polishing solution comprises 0.01-40 wt% of grinding particle, 0-10 wt% of oxidizer, 0.1-10 wt% of metal complexing agent, 0-5 wt% of metal corrosion inhibitor and the balance of water. The grinding particle is selected from at least one of monocrystal diamond, polycrystalline diamond, aluminum oxide, zirconium dioxide, titanium dioxide, cerium oxide, fumed silica and colloidal silicon dioxide; the oxidizer is selected from at least one of periodate, iodate, perchlorate, persulfate and hydrogen peroxide; the metal complexing agent is selected from at least one of ammonia, amino acid and organic acid; and the metal corrosion inhibitor is selected from at least one of nitrogen-containing heterocycle derivatives, sulfur-containing heterocycle derivatives and heterocycle derivatives simultaneously containing nitrogen and sulfur. The bearing steel obtained by using the polishing solution has the functional characteristics of low surface roughness and low number of defects, and thus, can be used in precise devices.

The invention discloses a method of preparing a modified polysaccharide tanning agent, and is characterized that polysaccharide which is 5 to 10 parts by weight and water which is 2 to 20 parts by weight are activated for 5 to 30 minutes through ultrasonic the power or which is 1000W, are filtered and dried to obtain activated polysaccharide the accessibility of which is increased; the activated polysaccharide which is 5 to 10 parts by weight, water which is 2 to 20 parts by weight, sodium hypochlorite which is 10 to 200 parts by weight, and sulfuric acid which is 1 to 10 parts by weight are evenly mixed and react for 2 to 6 hours under the temperature ranging from 30 to 60 DEG C; then sodium hydroxide which is 5 to 100 parts by weight is added in, and the mixed solution is evenly stirred, filtered and washed; then water which is 2 to 20 parts and periodic acid which is 5 to 10 parts are added, and an electric reaction is performed for 2 to 6 hours under the separation of a cationic membrane, wherein, the pressure is 5 to 10V, and the current is 25 to 50mA, the mixed solution is filtered, washed, and dried to obtain the modified polysaccharide tanning agent with aldehyde groups and carboxyl groups. In leather pale yellow which is tanned by the modified polysaccharide tanning agent, the grain tightness is smooth, the contraction temperature ranges from 80 to 85 DEG C, and the content of aldehydes in leathers are less than 40mg / kg in accordance with national standards.

The invention discloses a method for preparing a modified starch tanning agent, comprising the following steps of: firstly, degrading corn starch; in the presence of HRP (Horse Radish Peroxidase) / hydrogen peroxide (H2O2), grafting and modifying the degraded starch with sulfanilic acid, gallic acid and nekal; and then oxidizing the grafted starch with periodic acid. The invention has the innovation points that a nekal structure unit is introduced in the starch structure so as to improve the permeation wetting function of the modified starch tanning agent; the gallic acid structure unit is introduced to improve the tanning properties of the modified starch tanning agent, the sulfanilic acid is introduced to increase the dispersivity of the modified starch tanning agent, and dialdehyde action is used for improving the tanning properties of the modified starch tanning agent. The preparation method of the invention is peculiar and practical, and the obtained tanning agent is an environmentally-friendly leather tanning agent and is suitable for primary tanning and retanning. The shrinkage temperature (Ts) of pickled leather after primary tanning can be improved to 75-80 DEG C; and the retanned product has the advantages of wash resistance, high absorption rate on dyes and fatting agents and the like, is soft and plump.

The present invention relates generally to compositions and associated methods for chemical-mechanical polishing of substrate surfaces having at least one feature thereon comprising tungsten and at least one feature thereon comprising a dielectric material. The compositions and associated methods of the invention result in similar removal rates of both the tungsten and the dielectric material. Compositions used in the methods of the present invention typically have a pH from about 1.5 to about 3.5 and comprise periodic acid and colloidal silica.

A polymer having a carbon-carbon double bond in a main chain is decomposed by subjecting the carbon-carbon double bond to oxidative cleavage using an oxidizing agent such as periodic acid to decrease the molecular weight, polymer chains of the decomposed polymer are combined by changing acido-basic properties such that a system containing the decomposed polymer becomes basic when acidic and becomes acidic when basic, and a modified polymer in which the structure has been changed is obtained. By this, a functional group can be incorporated in the main chain structure of a polymer. A rubber composition comprising a rubber component containing the modified polymer, and a filler compounded therewith, and a pneumatic tire comprising the rubber composition are provided.

Reversibly crosslinked, water-soluble cellulose ethers having at least two different ether components is disclosed. At least one ether component is an alkyl, hydroxyalkyl or carboxymethyl group and at least one is an alkyl group having an aldehyde function which forms hydrolyzable hemiacetals with free OH groups of the cellulose ether. The cellulose ethers are obtainable by selective oxidation of cellulose ethers containing alkyl groups having vicinal OH groups (glycol cleavage). Preferably, water-soluble cellulose ethers are co-etherified simultaneously or subsequently with 2,3-epoxypropanol (glycidol) or 3-chloro-1,2-propanediol and the 2,3-dihydroxypropyl ether groups converted entirely or partly into 2-oxoethyl ether groups by oxidation. Suitable oxidants include periodate, periodic acid or lead tetraacetate. After washing and drying, cellulose ethers reversibly crosslinked via hemiacetals can be dispersed in water or aqueous solutions, going into solution homogeneously with a time delay. No low molecular weight dialdehydes or other problematical crosslinking reagents are liberated on dissolution.

The invention relates to a preparation method and application of a miniature high-efficiency clenbuterol immuno-affinity chromatography column. The technical scheme is characterized by comprising the following steps of: preparing a high-quality antibody, synthesizing efficient prepared bromoacetyl chloride clenbuterol purified by a liquid chromatogram and thiolation hemocyanin into immunogen immune animals, and obtaining antiserum; reacting the purified bromoacetyl chloride clenbuterol with thiolation agarose to obtain clenbuterol-agarose padding, loading the padding into an antigen affinity chromatography column; and purifying a clenbuterol specific antibody in the antiserum by using the antigen affinity chromatography column. The preparation method of the clenbuterol immuno affinity chromatography column comprises the following steps of: coupling high-quality antibodies at high density to the agarose oxidized by periodic acid to prepare an antibody affinity padding, and placing 25 mul of padding in a small specially-made column to prepare the miniature immuno-affinity chromatography column. The immuno-affinity chromatography column provided by the invention can be used for specifically gathering clenbuterol in a sample to be tested at high efficiency and can increase the accuracy, reliability and sensitiveness of detection when being combined with an analytic instrument and colloidal gold test paper for use.

The invention provides a mercury-free environment-friendly hematoxylin staining solution, which comprises the following components in portions by volume: 100-300 portions of 3-10 percent hematoxylin absolute ethyl alcohol solution, 1500-2000 portions of 2-6 percent aluminum sulfate aqueous solution, 60-100 portions of .05-2 percent periodic acid aqueous solution, and 15-30 portions of glacial acetic acid. Non-toxic and innocuous chemical reagents are adopted for the mercury-free environment-friendly hematoxylin staining solution, and a histological section staining experiment shows that the nucleus is clearly stained and the structures of the chromatin, nuclear membrane and nucleolus are clear.

The invention discloses a synthesis method for a chiral intermediate of atorvastatin calcium, and belongs to the technical field of medical intermediate synthesis. The synthesis method is characterized in that according to the process route, not only are dangerous, highly toxic and expensive chemicals such as butyl lithium, editpotassium cyanide and periodic acid in chemical synthesis prevented from being used, but also an ee value of the chiral intermediate is effectively improved due to usage of a mixed chiral catalysts of titanium iso-propylate and S-xenol. According to the synthesis method, the raw materials are low in cost and easy to obtain, the route operation is easy, the repeatability is good, the yield is very high, and the synthesis method is suitable for industrial production.

The invention discloses a method for preparing dialdehyde carboxymethyl cellulose and a method for detecting aldehyde content, wherein the method for preparing dialdehyde carboxymethyl cellulose comprises the following steps: dispensing sodium carboxymethyl cellulose 100 parts by dry weight and oxidant 80-100 parts by dry weight into solution reaction system, adjusting pH value scale of the reacting system between 1.5 and 4.0 and the reaction temperature between 25 and 45 DEG C to react for 1-10 hrs, charging precipitant to make the product precipitate and enabling the produce is dissolved out completely, and obtaining the product dialdehyde carboxymethyl cellulose which aldehyde group content is detected by hydroxylamine method via separating, washing and drying. By adopting the invention for preparing dialdehyde carboxymethyl cellulose, the aldehyde content can be controlled. A plurality of side reactions are prevented due to using periodic acid and periodic acid salt which is provided with high-degree selectivity as oxidant, thereby improving the raw material utility. The prepared dialdehyde carboxymethyl cellulose of the invention can be a biological medical material and a green leather tanning agent.

A polishing composition capable of satisfactorily polishing a semiconductor. The first polishing composition of the present invention includes silicon dioxide, at least one component selected from periodic acids and salts thereof, at least one component selected from tetraalkyl ammonium hydroxides and tetraalkyl ammonium chlorides, hydrochloric acid, and water, and contains substantially no iron. The second polishing composition of the present invention includes a predetermined amount of fumed silica, a predetermined amount of at least one component selected from periodic acids and salts thereof, a tetraalkyl ammonium salt represented by the following general formula (1), at least one component selected from ethylene glycol and propylene glycol, and water. The pH of the second polishing composition is greater than or equal to 1.8 and is less than 4.0.

The invention discloses an end-point fixing preparation method for a multi-aldehyde alginic acid coating. The method comprises the following steps: firstly, polymer material is soaked into sulfuric acid solution of potassium permanganate for acidizing treatment; then the material subjected to acidizing treatment is placed into polyethylene imine solution so as to obtain an amination decorated surface after reaction; periodic acid or sodium periodate is used for oxidation treatment to sodium alginate, aldehyde group is exposed at the tail end of the segment of alginic acid, and multi-aldehyde sodium alginate is obtained; the liquid reactant of the multi-aldehyde sodium alginate is prepared, the material on the amination decorated surface is placed into the liquid reactant, and the multi-aldehyde alginic acid coating is obtained through an end-point fixing method. The preparation method provided by the invention overcomes the defects of bad biocompatibility, poor anticoagulant activity,potential toxicity and the like in common polymer material.

In the case that a stacked layer, in which another metal layer is stacked on an Al layer or Al alloy layer having a low resistance, is used as a wiring material, an etchant is provided which can etch to a substantially equal etching rate by executing only one etching on the each metal layer composing the stacked layer. A method of manufacturing a substrate for an electronic device uses the etchant, producing an electronic device having the substrate. In order to achieve the object, the etchant has fluoric acid, periodic acid and sulfuric acid wherein the total weight ratio of the fluoric acid and periodic acid is 0.05˜30 wt %, the weight ratio of the sulfuric acid is 0.05˜20 wt %, the weight ratio of periodic acid to fluoric acid is 0.01˜2 wt %. Also each layer of wiring(5,12,14) formed by stacking Al layer or Al alloy layer and Ti layer or Ti alloy layer can be uniformly etched to substantially equal etching rate by the etchant.

The invention relates to an improved periodic acid Schiff (PAS) rapid staining kit. The kit comprises: a staining liquid, shedding-proof films, and cover slips. The staining liquid is a mixture of active fuchsine liquid and active fast green liquid, which is diluted with 95% of ethanol and 0.5% of sodium binitrite solution. The kit is advantaged in that: fuchsine and fast green are firstly prepared into a rapid biological rapid staining liquid; the staining process is fast, wherein the staining process takes 10 seconds; the detection process is simple, wherein a result can be observed directly, and washing is not required; the application scope is wide, wherein the kit can be used for staining various clinic specimens such as scurf, mucous and vaginal secretion. Periodic acid is attached on object slides, such that packing materials of the product is saved, and the operation process is simplified. The kit is especially suitable for a large clinic specimen amount. Because periodic acid, which is a flammable and combustible product, is attached to the object slides, periodic acid turns from liquid into a dried status. Therefore, danger of periodic acid is greatly reduced, and a standardized operation is easy to achieve. Poor repeatability due to personal operation errors can be avoided.

Described, in certain aspects, are medical products comprised of uniquely prepared remodelable extracellular matrix (ECM) materials retaining at least a portion of their native bioactivity. Also described are methods for forming and using such products. In one embodiment, an inventive product comprises a layer of remodelable ECM material modified through contact with periodic acid or a salt thereof. In some forms, such a modified ECM material layer includes non-native Schiff's base crosslinks within and / or between certain components of the ECM material (e.g., between two collagen molecules, two non-collagen molecules, and / or a collagen molecule and a non-collagen molecule). Other inventive products are comprised of various gels, foams, pastes, and formed, coherent, porous bodies at least containing ECM materials that have been modified in accordance with the present invention.

The invention discloses a modified rice dialdehyde starch retanning filler for leather and a preparation method of the filler. The preparation method comprises the following steps: performing dihydroformylation modification and degradation on rice starch, wherein a used dihydroformylation agent is periodic acid or sodium periodate, a used degradation agent is a water solution of enzyme or acid, the relative average molecular weight of the obtained modified rice dialdehyde starch retanning filler is 2000-40000Da, and the aldehyde content is 30%-98%. The modified rice dialdehyde starch retanning filler prepared by adopting the method has good retanning filling capability on the leather; when the filler is applied to the leather, the leather strength can be improved, the leather location difference can be effectively reduced, the leather yield can be increased, the hand feel of the leather is full and soft, and the absorption of grease and dye in a subsequent process cannot be influenced.

The invention discloses a composite water treatment agent. The composite water treatment agent consists of 0.3 to 45 weight parts of permanganate, 0.3 to 45 weight parts of ferrate, 1 to 10 weight parts of sodium silicate or 0.1 to 1 weight part of periodate, and 10 to 30 weight parts of sodium hydroxide or potassium hydroxide based on the weight of pypocholoride solution at the mass percent concentration of 10 to 30 percent. According to the composite water treatment agent, permanganate is combined with ferrate, the synergistic effect between the permanganate and the ferrate is fully exerted, the defects of the permanganate and the ferrate are eliminate, the capacity of removing ammonia nitrogen, organic matter, manganese ions, odor and chromaticity in water is enhanced, a water treatment effect is greatly improved, and water treatment cost is reduced. The prepared mixed solution can be stored stably for a long time, a process is simple, and the agent is convenient to use, and improves water treatment safety.