193 results about "Starch hydrolysis" patented technology

The present invention relates to a process for making a bread product. The process includes the addition of a non-maltogenic exoamylase that hydrolyses starch to a starch medium, and the application of heat to the starch medium. The non-maltogenic exomylase cleaves one or more linear malto-oligosaccharides, predominantly consisting of from four to eight D-glucopyranosyl units, from non-reducing ends of amylopectin side chains. The non-maltogenic exoamylase has an endoamylase activity of less than 0.5 endoamylase units (EAU) per unit of exoamylase activity.

The present invention provides a starch that includes at least one glucose polymer having greater than 4% alpha 1-6 glycosidic linkages. The present invention further provides a starch hydrolyzate that includes at least one glucose oligomer having greater than 4% alpha 1-6 glycosidic linkages. The starch and starch hydrolyzate present invention have improved aqueous solution stability and are less likely to retrograde than are solutions of unbranched linear starches or starch hydrolyzates. The present invention further provides a method of improving the aqueous solution stability of a starch or a hydrolyzate thereof, which method includes introducing one or more alpha 1-6 glycosidic linkages so as to branch one or more of the linear polysaccharides or hydrolyzates thereof. The method of the present invention also includes a method of improving the aqueous solution stability of amylose and amylose hydrolyzates by introducing one or more alpha 1-6 glycosidic linkages so as to branch one or more molecules of amylose or hydrolyzate thereof.

The present invention relates to filamentous fungal host cells and particularly Trichoderma host cells useful for the production of heterologous granular starch hydrolyzing enzymes having glucoamylase activity (GSHE). Further the invention relates to a method for producing a glucose syrup comprising contacting a granular starch slurry obtained from a granular starch substrate simultaneously with an alpha amylase and a GSHE at a temperature equal to or below the gelatinization temperature of the granular starch to obtain a composition of a glucose syrup.

The invention provides a saponin extracting method with multi-enzyme hydrolytic which hydrolyses brown Windsor in advance and produce starch sugar. The method cleans the brown Windsor and grinds it into pulp, then adds in alpha starch enzyme to be liquefied, adds in saccharifying enzyme, heats and carries on deactivation, then the saccharified materials are separated centrifugally, gets the filtered cake and starch sugar liquiud, the sugar liquid is separated with hyperfiltration membrane with 1000-10000daltons aperture catching molecular weight or tiny filtration membrane of 100-200nm and gets the starch sugar liquid, the filter residues are mixed into centrifugated filter cake and gets sugar residue, adds in chlorhydric acid or sulfuric acid to hydrolyse the sugar residue, the hydrolysed product is filtered, cleaned, and dried, extracted by solvent, finally gets the saponin product.

A method for catalyzing and synthetizing modified stevioside by using microwave auxiliary cyclodextrin glucosyltransferase relates to the technical field of biosynthesis of organic compounds, and comprises the following steps: taking stevioside aqueous solution and starch hydrolyzates as raw materials, and synthetizing stevioside replaced by glucose residue under the combined action of microwave radiation and CGTase catalysis in a microwave reaction device. In the process condition provided by the invention, enzyme catalysis reaction can be remarkably quickened, and the phenomenon that microwave of a water system enable enzyme to be inactive under the usual condition. Through tasting, the bitter taste of the synthetic modified stevioside is greatly reduced.

The present invention is directed towards a blend for use as a bulking agent in baked goods. The bulking agent of the present invention comprises a starch hydrolysis product, a bulk sweetener, and an emulsifying agent. The bulking agent serves as a direct, one-to-one, replacement of sugar in the baked product without the need for reformulation of other ingredients and/or process modifications.

The invention discloses a yolk-eggshell structured catalyst and a preparation method and an application thereof. By a simple and environmentally friendly inclusion-etching technology, preparation of a yolk-eggshell structured catalyst with the diameter of 400-500nm is realized. Compounding of the yolk-eggshell structured catalyst and saccharifying enzyme is applicable to an amylolysis-hydrogenation one-step method for production of sorbitol. The catalyst provided by the invention has the following advantages: the preparation technology of the catalyst is simple and environmentally friendly; the core has high catalytic hydrogenation activity, and operating temperature for production of sorbitol by the amylolysis-hydrogenation one-step method can be reduced; the shell has volatile pores which are beneficial to mass transfer of reactants; and the catalyst provided by the invention has more excellent catalytic performance than a non-yolk-eggshell structured supported metal catalyst and can be reused for many times.

The invention relates to a production process of instant maize germ powder. The instant maize germ powder is prepared through raw material preprocessing, beating, enzymolysis, enzyme inactivation, colloid milling, sterilization, high-pressure homogenization and spray drying by taking maize germ meal as a raw material; the enzymolysis is carried out by adding medium-temperature alpha-amylase accounting for 0.2%-0.4% of the dry weight of the maize germ meal, and the starch hydrolysis DE value (Dextrose Equivalent value) of maize germ meal slurry which is subjected to enzymolysis is controlled between 18% and 22%; the prepared homogenized maize germ meal slurry achieves the easiness for the spray drying, and a finished product does not absorb moisture, so that the dissolution stability of the maize germ powder is enhanced, the deposition has small possibility of appearing in the dissolving process, and the maize germ powder is not caked and agglomerated when being dissolved in water; and the additional value of maize germ meal is increased. The instant maize germ powder obtained through the method disclosed by the invention achieves the protein content more than 23%, is in a faint yellow color and is fast in dissolution; and the dissolved instant maize germ powder is uniform in state and achieves the product dissolution time less than 27 seconds without any unpleasant odor.

The invention relates to porous starch and a joint preparation method for liquid glucose used for fermentation of the porous starch. The joint preparation method comprises the steps of size mixing 1000 parts by dry weight of starch raw materials with water, regulating the concentration of starch milk to be 40%-50% and the potential of hydrogen (pH) of 4.0-6.0, under condition of the temperature of 30 DEG C-55 DEG C, adding 0.5-5.0 parts by weight of amylase, stirring for 5-30 hours for enzymolysis, exhausting the liquid, washing, drying, smashing and obtaining solid powdery porous starch, utilizing enzymolytic liquid glucose and washing liquid in the process of preparation of the porous starch for size mixing of the starch, liquefying, saccharifying, transforming protein, filtering, concentrating and carrying out other procedures. According to the joint preparation method, enzymolysis of glucose amylase or composite saccharifying enzyme is utilized for preparation of the porous starch, the sugar component of starch hydrolysate is mainly glucose, and products with glucose as main composition are generated. If beta-amylase or fungus amylase is utilized, or the beta-amylase or fungus amylase is carried out saccharification with debranching enzyme, products with maltose as main composition are generated.

The invention discloses a completely biodegradable starch resin which consists of starch of biodegradable modification and completely biodegradable polyester. A starch initiator is hydrolyzed by a starch hydrolytic enzyme to form the starch of biodegradable modification. The completely biodegradable polyester is aliphatic polyester or aliphatic-aromatic copolyester with complete biodegradation. The completely biodegradable starch resin particles of the invention can be prepared into film products which conform to European Compostable Standard (EN13432 of September 2000) and United States Compostable Standard (ASTM norm D 6400-04).

The invention discloses a bacillus megaterium strain (bacillus megaterium L2) and anapplication thereof. The bacillus megaterium strain has the morphological characteristics that the strains are cultivated on an ordinary agar culture medium for 36h at the temperature of 37 DEG C, a shape of a colony is similar to a circle, the surface of the colony is salient, yellow and not transparent, the colony is 2-4mm, the edge of the colony is tidy, and the surface of the colony is glossy or darker and does not secrete pigments; the strains are gram-positive bacteria, are in a shape of a rod, are (1.2-1.5)*(2.0-4.0) microns, are arranged in a chain shape and have the motility, and a spore is in an ellipse shape, is terminal or subterminal and is not obvious in expansion; and the strains can endure cultivation by 7 percent of NaCl, are positive to calalase, glucose ferment, amylolydrolysis, nitrate reduction, gelatin liquefaction, semisolid puncturing test, milk decomposition, citrate utilizing test and pH 5.7, and are negative to VP (Voges-Proskauer) test, benzpyrole test and mannitol hydrolysis. According to the bacillus megaterium strain disclosed by the invention, a heat-resistant spore can be produced, and the bacillus megaterium strain is easy to produce and process in dosage form and is also beneficial to survival, colonization and propagation.

The embodiment in the invention provides a new bacterial strain degrading polycyclic aromatic hydrocarbons with five rings or six rings, and an acquiring method and application of the same, relates to the technical field of biological processing for environment pollutants, and the new bacterial strain is capable of efficiently degrading the polycyclic aromatic hydrocarbons with five rings or six rings. The new bacterial strain has the name of ZH-L8, the morphological characteristics comprise that a circle milk-white bacterium colony is grown on a solid medium and has a smooth edge; the new bacterial strain is in the shape of a rod when being observed under a microscope; the cell shows a Gram-positive rod shape, the later sides are parallel, and two ends are blunt; and the bacterium colony is circle, the edge is smooth, the bacterium colony is tightly adhered to the medium, and the bacterium colony is white and not transparent. The physiological biochemical characteristics comprise that the bacterium well grows in the temperature scope of 20-45 DEG C, grows well when pH is 5.7 and 6.8, has the salt-resistant concentration of 5%, and is methyl-red positive, contact-enzyme positive, v-p negative with the v-p solution final pH less than 6, arginine utilization positive, nitrate utilization positive, positive for D-glucose acid production, lactose acid production and cane sugar acid production, positive for starch hydrolysis, and the like.

The invention discloses a preparation method of glucose 1-phosphoric acid, belonging to the technical field of enzyme catalysis of glucose 1-phosphoric acid. According to the preparation method of glucose 1-phosphoric acid, starch or a starch derivative is taken as a substrate and is converted into glucose 1-phosphoric acid through efficient catalysis of acellular multienzyme in a multienzyme reaction system. By optimizing the process, enzyme capable of promoting starch hydrolysis and enzyme utilizing a side product maltose are added so as to establish the multienzyme reaction system, so that the conversion efficiency of the raw materials is remarkably improved, and the yield of glucose 1-phosphoric acid is remarkably increased. The preparation method has the beneficial effects that the conversion rate of the raw materials is high, the yield of glucose 1-phosphoric acid is high, the steps are simple, the production cost is low, the environment is hardly affected, and the large-scale production of glucose 1-phosphoric acid can be realized.

A starch hydrolysis food making process comprises mixing rice flour and rice syrup or honey in equal parts, adding amylase enzymes to the mixture, and extruding for a few seconds at an elevated temperature. Water may be added to the rice flour mixture to adjust the final product texture. A second extrusion can be used to adjust the pH. In a second starch hydrolysis method embodiment of the present invention, one part of water is mixed with five parts of rice flour. Then amylase enzymes are added to the mixture and extruded for a few seconds at an elevated temperature. The extrusion products are then packaged as food ingredients.

The present invention provides a process for producing crystal D-ribose, including the following steps: (1) accessing air to perform aerobic fermentation to Bacillus subtilis in the fermentation medium containing a substrate composed of starch, starch hydrolysis sugar, monosaccharide and disaccharide mixing sugar, and then collecting the D-ribose supernatant from the fermentation products; (2) adopting cationic resin and anion resin desalinization processing to the D-ribose supernatant collected by the step (1), and then concentrating the desalinized solution to obtain a sugar; (3) adopting achemical method or chromatography method to separate and refine the obtained concentrated sugar to get a crystal D-ribose. The crystal D-ribose obtained by the method of the invention has a white content of more than 90% and HPLC purity of more than 99.5%, can be directly used as food additives, and can also be easily used for preparation of anti-virus and anti-cancer drugs.

The invention provides walnut-red date wine and a brewing method thereof. The walnut-red date wine comprises the following raw materials in percentage by mass: 1-5 percent of oil-squeezed walnut powder, 1-5 percent of dry red dates, 18-22 percent of cane sugar or starch hydrolysis sugar, 4-8 percent of bean sprout juice, 0.02-0.04 percent of a phosphonium salt, 1-5 percent of blended yeast and the balance of water. A brewing process comprises the following steps of: washing red dates and denucleating; mixing with oil-squeezed walnut powder, soaking and homogenizing; mixing other components; sterilizing; inoculating into strains of which the collection numbers are CGMCC NO.5919 and CGMCC NO.5918 for fermenting for 8-10 days at an earlier stage and for 5-7 days at a later stage; and after fermenting, centrifuging a fermentation liquor and filtering to obtain fruit wine; or distilling the fermentation liquor to obtain white liquor. The fruit wine obtained by filtering has salubrious mouthfeel, light walnut flavor, strong date flavor, white liquor obtained by distilling, and light walnut and date flavors.

The invention relates to a method for hydrolyzing pearl starch into soluble starch hydrolysate in the temperature which is lower than the initial gelatinization temperature of the pearl starch.