807 results about "Alant starch" patented technology

The present invention is directed to a yeast strain, or strains, secreting a full suite, or any subset of that, full suite, of enzymes to hydrolyze com starch, corn fiber, lignocellulose, (including enzymes that hydrolyze linkages in cellulose, hemicelhiiose, and between lignin and carbohydrates) and to utilize pentose sugars (xylose and arabinose). The invention is also directed to the set of proteins that are well expressed in yeast for each category of enzymatic activity. The resulting strain, or strains can be used to hydrolyze starch and cellulose simultaneously. The resulting strain, or strains can be also metabolically engineered to produce less glycerol and uptake acetate. The resulting strain, or strains can also be used to produce ethanol from granular starch without liquefaction.; The resulting strain, or strains, can be further used to reduce the amount of external enzyme needed to hydrolyze a biomass feedstock during an Simultaneous Saccharification and Fermentation (SSF) process, or to increase the yield of ethanol during SSF at current saccharolytic enzyme loadings. In addition, multiple enzymes of the present invention can be co-expressed in cells of the invention to provide synergistic digestive action on biomass feedstock. In some aspects, host cells expressing different heterologous saccharolytic enzymes can also be co-cultured togetherand used to produce ethanol from biomass feedstock.

The invention provides latex for papermaking. The latex contains starch, oxidants, hydrophobic modifying agents and water, wherein the dosage of the oxidants is 7-10% of the mass of starch; the dosage of the hydrophobic modifying agents is 5-20% of the mass of the starch; the hydrophobic modifying agents are selected from at least one of dodecenyl succinic anhydride, maleic anhydride, epoxy chloropropane, an alkyl ketene dimmer, alkenyl succinic anhydride, a styrene-acrylate copolymer, a silane coupling agent and a titanate coupling agent. The invention also provides a preparation method of the latex for papermaking and a coating containing the latex for papermaking. The problems that the wet strength of finished paper is poor and dusting happens easily because the paper is coated with the starch-based latex for papermaking in existing processes are solved.

A lipophilic starch is provided along with methods of making the same. The starch is prepared by modifying the starch with an organic acid anhydride reagent, such as octenyl succinic anhydride, drying the modified starch to a moisture content of less than 15% by weight, and then heat treating the dried starch at a temperature of at least 100° C. for at least one minute.

The invention discloses a process for moderate-temperature self-assembly preparation of nano starch from enzymolysis short amylose. The process particularly comprises the following steps: (1) preparing a buffer solution; (2) preparing a starch water solution; (3) past-forming; (4) enzymolyzing, and then using anhydrous ethanol to precipitate the degreased starch solution; (5) preparing short amylose; (6) preparing nano starch. According to the process, enzyme hydrolysis starch is adopted to prepare nano starch at 30-70 DEG C in an anabiosis manner, the nano starch prepared by the method is high in productivity, low in cost, safer and more environment-friendly, and can serve as embedding materials of medicines, active ingredients and the like, and the application field of the process in the food industry is widened.

The invention discloses low-viscosity starch glue for preparing starch capsules as well as a preparation method and an application of the low-viscosity starch glue. According to the preparation method disclosed by the invention, a starch structure is sheared through amylase for the first time in a process of preparing the starch glue, thus preparing starch glue that viscosity is reduced to 1000-7000cps. Furthermore, the invention provides a preparation method of the low-viscosity starch glue, wherein the low-viscosity starch glue is prepared from starch or modified starch, gel and a plasticizer through such steps as dissolving at a low temperature, gelatinizing at a high temperature and enzymatically hydrolyzing at an intermediate temperature to control viscosity. To improve strength of the low-viscosity starch glue, the method disclosed by the invention initiates a way of adding a starch glue enhancer to the starch glue, so that tensile strength of the starch glue can reach 15-40MPa. The prepared starch glue disclosed by the invention is applicable to automatic production of various hollow capsules.

The invention provides a method for pretreating cotton fabrics by adopting glucoamylase/glucose oxidase, pectinase and CBD (cellulose-binding domain)-lignin peroxidase, belonging to the technical field of cotton fabric dyeing and finishing pretreatment. The method is characterized in that the cotton fabrics are firstly treated in mixed enzyme solution containing the glucoamylase and the glucose oxidase and the glucoamylase catalyzes the starch size on the fabrics to be decomposed into glucose so as to eliminate the size; the glucose oxidase catalyzes the glucose and oxygen to act to generate hydrogen peroxide; the generated hydrogen peroxide not only plays a role of bleaching but also can damage the hydrophobic surface structure of the cotton to expose the lower pectic substances; then the cotton fabrics are treated in alkaline pectinase solution to remove the pectic substances through decomposition; and finally the cotton fabrics are treated in CBD-lignin peroxidase solution to finally remove the cotton seed hulls through decomposing the lignin in the cotton seed hulls. The method provided by the invention can replace the traditional chemical treatment method to realize full bio-enzyme pretreatment of the cotton fabrics, and at the same time the traditional hydrogen peroxide can be no longer adopted for bleaching.

The invention discloses modified starch and a manufacturing method and application of the modified starch. The manufacturing method of the modified starch provided by the invention comprises the following steps: dispersing starch by an organic solvent, adding water and uniformly mixing to prepare a starch suspension, and performing the microwave or the ultrasonic treatment to obtain the modified starch. According to the invention, crystalline regions in modified starch granules are greatly reduced, and the crystallinity of the modified starch granules is decreased from 15-45% to 8-30%. After the crystallinity is decreased, cassava starch is used for manufacturing dialdehyde starch, hydroxypropyl starch and octenyl succinic anhydride starch ester and has obviously improved reactivity.

The invention relates to filed of biology and in particular relates to a method of preparing sugar by utilizing biomass sweet potato residues, used for microbial fermentation, as a sugar source. The method comprises the following steps of: adjusting the pH of sweet potato residue powder or wet residue to be 5.5-8.0, and carrying out heat preservation by adding alpha-amylase; adjusting the pH to be 3.0-5.5, carrying out enzyme removal after carrying out heat preservation at 40-65 DEG C by adding saccharifying enzyme, acid protease and cellulose; and carrying out solid-liquid separation on a feed liquid, and concentrating the liquid to obtain a sugar liquid product, wherein the ingredient of the sugar liquid product is basically the glucose. The preparation method is simple in process, highin specificity, high in product quality, and high in yield, can be used for solving the problem that the environment is severely polluted by the sweet potato residues, and is good in industrial application prospect.

The invention discloses a polylactic acid/starch biologic degradable composite material which is prepared from the following components in percentage by weight: 30-94% of polylactic acid, 0.1-10% of phenol epoxy compounds, 5-60% of natural starch, 0-1% of an antioxidant, 0-5% of a lubricant, 0-1% of a catalyst and 0-1% of a hydrolysis resisting agent. The composite material is safe and non-toxic, biodegradable and excellent in mechanical performance. The invention further discloses a preparation method of the polylactic acid/starch biologic degradable composite material. The preparation method comprises the following steps: uniformly mixing the polylactic acid, the phenol epoxy compounds, the natural starch and various assistants; then, adding the mixed materials into a phenol epoxy compounds for melt blending; then, bracing and dicing; and drying to obtain the polylactic acid/starch biologic degradable composite material. The preparation method is simple, easy to control and implement, strong in operability and low in production cost, and the prepared composite material can be applied to the fields of thin films and disposable tableware and the like.

The invention discloses a starch and polycaprolactone blend, a preparation method thereof and application of the blend used as a solid carbon source to the removal of nitrate from water. The preparation method comprises the following steps of: adding additives such as a plasticizer and the like into starch and polycaprolactone which are taken as raw materials, stirring and mixing uniformly, performing one-time extrusion by using a twin-screw extruder, and pelleting to obtain a product. The starch/polycaprolactone blend can be synchronously taken as a denitrification carbon source and a biofilm carrier in water treatment, so that the disadvantages of the use of the conventional liquid denitrification carbon source are overcome; moreover, the cheap starch is added into the blend, so the method has a remarkable economic advantage compared with a method in which the polycaprolactone is used as the solid carbon source. The blend can be applied to biological denitrification fields of surface water containing nitrates which exceed the standard, underground water, advanced treatment of sewage treatment plants and the like.

The invention relates to a production technology of resistant rice starch. A production method for preparing resistant rice starch comprises the following steps: firstly, gelatinizing, debranching and crystallizing the rice starch, and then drying the extracted resistant rice starch to obtain the resistant rice starch; improving the content of amylase in the rice starch by debranching treatment; controlling the concentration of the gelatinized rice starch at 20-50%, the debranching enzyme content at 12-25U/g, the debranching temperature at 45-55 DEG C and the debranching time at 12-20 hours; crystallizing under the condition of 2-12 DEG C after debranching is ended, and then extracting the resistant rice starch, and drying under the condition of 50-70 DEG C. The excessive rice resources such as broken rice and early indica rice can be reasonably utilized, the economic value of the potential resources is increased, and the produced resistant rice starch can overcome the defects of the traditional dietary fibers. By adopting the production method disclosed by the invention, the deep processing utilization level of the rice starch in China can be improved, and the method has important significance on development of grain storage enterprises and rural economy.

The invention relates to a preparation method of resistant dextrin. The method comprises the following steps: (1) adding starch dry powder into an acid solution, and stirring uniformly to obtain a starch acid treatment sample; (2) carrying out predrying pyrolysis reaction on the starch acid treatment sample to obtain a pyrolysis product; (3) carrying out polymerization reaction on the pyrolysis product to obtain the resistant dextrin crude product; (4) dissolving the resistant dextrin crude product in water, carrying out high-temperature alpha-amylase and composite saccharifying enzyme enzymolysis, and carrying out decolorization, ion exchange, concentration, chromatographic separation, secondary ion exchange, secondary concentration and drying to obtain the resistant dextrin. The starch dry powder is subjected to two dextrinization reaction stages and enzymolysis reaction to obtain the resistant dextrin with different dietary fiber contents by controlling the reaction conditions, thereby lowering the subsequent separation purification difficulty, lowering the production cost, optimizing the components of the resistant dextrin, and enhancing the product quality.

The invention discloses a process for preparing neosorb and coproducing fructose-glucose syrup. The process comprises the steps of (1) preparing a saccharified liquid from starch, and removing impurities to obtain a refined saccharified liquid; (2) carrying out nanofiltration treatment on the refined saccharified liquid to respectively obtain glucose filtrate and a disaccharide-concentrated liquid; (3) preparing neosorb from glucose filtrate; (4) carrying out nanofiltration treatment on the disaccharide-concentrated liquid to respectively obtain a glucose washing and filtering liquid and a washed and filtered concentrated liquid; and (5) preparing the fructose-glucose syrup from the glucose washing and filtering liquid, and mixing the washed and filtered concentrated liquid and the starch in the step (1) to prepare the saccharified liquid. According to the process, a continuous nanofiltration separation technology is adopted, the refined saccharified liquid is separated into several components with different glucose contents, then, products such as neosorb and the fructose-glucose syrup are respectively prepared according to different contents of all the components, and a low-content glucose solution is recycled, so that the whole process has the advantages that the saccharified liquid is efficiently utilized, and no resources are wasted.