257 results about "Tapioca starch" patented technology

The invention provides a preparation method of composite modified hydroxypropyl starch ether, and relates to the technical field of starch ether preparation. Corn starch and cassava starch are used as raw materials, the modified hydroxypropyl starch ether is prepared through premixing, alkalization and high-low temperature layering etherification, sodium citrate is added in the etherification process to serve as a stabilizer, the produced product has the advantages of being high in hydroxypropyl content, viscosity, solution transparency and whiteness, low in ash content and the like, the production cost is reduced, and the product is suitable for industrial production. The requirements of the market on high-quality, high-stability and low-cost starch ether are met.

The invention relates to the technical field of hydrogel preparation, in particular to a preparation method of novel biomass hydrogel. The biomass hydrogel prepared by the invention overcomes the problems of poor hygroscopicity and poor recyclability of traditional hydrogel in a low-humidity environment. The cassava starch is oxidized by sodium periodate to prepare dialdehyde starch, so that the hydrophilicity is enhanced; sodium alginate is coated and combined with an epoxy group to covalently bond and fix lithium chloride, so that salt slow release and low-humidity deliquescence are realized; the ink containing the nano carbon material is introduced, so that efficient photo-thermal conversion is realized; meanwhile, after the substances are subjected to three-dimensional crosslinking, a polymer network-shaped gel structure is formed, and gradient drying and rehydration control are combined, so that the porous structure and the mechanical strength are guaranteed. The prepared hydrogel can quickly absorb moisture and efficiently perform photo-thermal evaporation in a low-humidity environment, and is good in recyclability.

Raw material starch of the oil processed starch contains waxy cassava starch. And a method for producing cooked edible meat, which comprises heating and cooking the edible meat to which the fat-processed starch is attached. And a method for improving the texture of cooked edible meat, said method comprising heating and cooking the edible meat to which the fat-processed starch is attached.

The invention discloses a method for identifying and quantifying multi-type starch adulterated sweet potato starch. The method comprises the following steps of: establishing a characteristic near infrared spectrum database of sweet potato starch, potato starch, corn starch, cassava starch and the like by taking common low-value raw material starch such as cassava starch, corn starch and the like as a doping object of sweet potato starch and taking a near infrared spectrum technology as a detection means; pre-treating the obtained spectrum by combining a stoichiometric method and establishing a multi-type identification model to realize identification of pure sweet potato starch and non-pure sweet potato starch, and predicting the proportion of the sweet potato starch in the sweet potato starch. The method disclosed by the invention has important reference significance for formulating a potato starch classification standard, can be used for quickly and accurately identifying the starch type, is beneficial to fighting against bad behaviors such as counterfeiting and adulteration of starch in the market, guides the collection, storage and processing of sweet potato starch, and helps to screen high-quality potato starch raw materials for potato starch products; and the overall value and practicability of the starch-based product are improved.

The invention discloses environment-friendly cassava cat litter and a preparation method thereof, and belongs to the technical field of pet supplies, and the environment-friendly cassava cat litter is prepared from the following raw materials in parts by weight: 45-55 parts of cassava starch, 20-30 parts of cassava peel, 8-15 parts of corn starch, 8-12 parts of water hyacinth fiber, 5-10 parts of bamboo fiber, 2-4 parts of propolis and 1.5-3.0 parts of mussel mucin. The raw materials are subjected to step-by-step synergistic enzymolysis and step-by-step fermentation to obtain the environment-friendly cassava cat litter. According to the mode, natural raw materials are combined, and the preparation process of step-by-step enzymolysis and step-by-step fermentation is adopted, so that the antibacterial performance and water absorption performance of the cat litter are improved, the defecation comfort and cleanliness of pet cats are improved, sanitation and health of pets and family environments are guaranteed, meanwhile, the product can be completely degraded in the natural environment after being used, and the environment is protected. The cat litter does not generate permanent solid waste like bentonite and silica gel cat litter, and is very environment-friendly.

The invention belongs to the technical field of veterinary drug preparations, and particularly relates to a compound external ointment for treating parasites of dogs and cats and skin tinea and a preparation method, the compound external ointment comprises the following components by mass percent: 2%-12% of selamectin, 3%-20% of imidacloprid, 0.5%-2% of terbinafine hydrochloride, 2%-12% of dipropylene glycol monomethyl ether, 10%-50% of isopropanol, 9%-45% of polyethylene glycol 400 and the balance of water. The adhesive is prepared from, by weight, 9%-45% of polyethylene glycol 3350, 5%-15% of caprylic / capric polyethylene glycol glyceride, 1%-8% of oleyl alcohol, 0.5%-5% of dimeticone, 0.01%-0.1% of butylated hydroxytoluene and 1%-5% of cassava starch polymethylsesquioxane. The preparation method comprises the following steps: uniformly stirring the selamectin, the imidacloprid, the terbinafine hydrochloride and the mixed solvent, then mixing with the matrix (the polyethylene glycol 400 and the polyethylene glycol 3350 are heated and uniformly mixed in advance), the emulsifier and other components, and homogenizing. The compound selamectin ointment prepared by the invention can realize accurate administration at the edge of the auricle of an animal, and not only can ensure that the medicine is fully absorbed, but also can improve the compliance of animal administration; the composition not only can expel parasites in a broad spectrum, but also has broad-spectrum antifungal activity, and can prevent and treat a plurality of skin diseases of pets.

The invention discloses a plugging agent for oil-based drilling fluid, and relates to the technical field of plugging agents. The plugging agent comprises a rigid material, pre-gelatinized cassava starch, inorganic fibers, gel particles and base oil, and preparation raw materials of the gel particles comprise allyl glycidyl ether, alkyl primary amine, short-chain acrylate, long-chain acrylate, styrene and unsaturated silane. According to the blocking agent for the oil-based drilling fluid, by arranging the rigid material, the pre-gelatinized cassava starch, the inorganic fibers and the gel particles, microcracks of a shale reservoir can be effectively blocked, and the blocking effect is good.

The invention belongs to the technical field of gel. The invention provides high-strength starch sodium octenylsuccinate gel and a preparation method thereof.The preparation method comprises the steps that S1, corn and cassava starch are mixed according to the mass ratio of 1: (4.4-4.6) to obtain a mixture, and then the mixture and soft water are dispersed according to the mass ratio of 1: 1.1 to obtain starch milk; s2, adjusting the pH value of the starch milk to 9.0 by using a sodium hydroxide solution, then adding octenyl succinic anhydride at 25 DEG C, then adding sucrose ester and pectin, neutralizing the pH value to 4.5 by using an HC1 solution, and carrying out suction filtration, washing and crushing to obtain starch sodium octenyl succinate powder; and S3, gelatinizing the starch sodium octenylsuccinate powder, and storing the gelatinized starch sodium octenylsuccinate powder at low temperature to obtain the high-strength starch sodium octenylsuccinate gel. According to the invention, by reducing the ratio of corn starch to cassava starch, the viscosity of the prepared starch sodium octenylsuccinate is further improved while a lower gelatinization temperature is ensured.

The invention provides resistant dextrin as well as a preparation method and application thereof, and belongs to the technical field of preparation of resistant dextrin. The preparation method of the cassava starch resistant dextrin comprises the following steps: gelatinizing cassava starch, mixing the gelatinized cassava starch with pullulanase, carrying out debranching enzymolysis, mixing supernate with an ethanol water solution, washing precipitates with absolute ethyl alcohol, mixing the precipitates with water, recrystallizing at 45-55 DEG C, and collecting crystal substances, so as to obtain the cassava starch resistant dextrin. The cassava starch resistant dextrin with high purity and high resistant starch content can be prepared by taking cassava starch as a raw material and pullulanase as debranching enzyme and adopting a green preparation process of debranching, alcohol precipitation and recrystallization, and the resistant starch content in the prepared resistant dextrin is 50-70%. The preparation method is energy-saving and environment-friendly, and can be commercially applied. Theoretical guidance is provided for preparing the resistant dextrin based on a green process, and a basis is provided for improving the application of the resistant dextrin in the food industry.

The invention discloses dialdehyde starch waterproof and oilproof packaging paper and a preparation method thereof, and belongs to the technical field of packaging materials. The tapioca starch waterproof and oil-proof paper comprises raw paper, the surface of the raw paper is coated with a dialdehyde starch waterproof and oil-proof layer, and the dialdehyde starch waterproof and oil-proof layer is prepared by modifying tapioca starch through an oxidizing agent. After the prepared coating is applied to the surface of kraft paper, the coating has excellent waterproof and oil-proof performance, the situation that when the coating is in contact with food with large moisture and oil content, the moisture and the oil content can soak a package, consequently, the package is damaged, and the food package is unstable can be avoided, and the coating has good barrier performance and can be widely applied to the field of food packaging. Meanwhile, the material disclosed by the invention has good biodegradability, can be naturally degraded in the environment, and is more environment-friendly.

The invention discloses a preparation method of a nano embedding material based on a low-temperature superfine grinding technology, and belongs to the technical field of modified nano materials. The method comprises the following steps: cleaning and slicing fresh beautiful millettia root and stem, performing programmed liquid nitrogen freezing, and performing jet milling to obtain nano powder; the preparation method comprises the following steps: taking anionic polysaccharide, neutral polysaccharide nanoparticles, nano-modified cassava starch and deionized water, magnetically stirring, carrying out ultrasonic treatment, and mixing for 30-45 minutes; mixing the wall material solution with the nano-powder, performing ultrasonic treatment to form a coating solution, adding calcium chloride and Tween 80, and stirring; and spraying a magnesium chloride solution at the voltage of 40-60kV and the flow rate of 0.5-1.5 mL / h, stirring, mixing with a chitosan solution according to the mass ratio of 1: (2-4), adjusting the pH value, stirring, and freeze-drying to obtain the product. The millettia specisoa champ embedding method retains the active ingredients of millettia specisoa champ, improves the embedding efficiency by 85-96%, is stable, controls release, and is suitable for health care products and drug carriers.

The invention relates to the technical field of feed and fermentation, in particular to compound feed for promoting healthy growth of micropterus salmoides as well as a preparation method and application of the compound feed. The compound feed is prepared from the following components in parts by weight: 30 to 40 parts of fish meal, 10 to 15 parts of chicken meal, 0 to 10 parts of tenebrio molitor protein, 9 to 11 parts of fermented soybean meal, 7.5 to 9.5 parts of egg powder, 1 to 6 parts of beer yeast powder, 4 to 10 parts of flour, 2 to 3.5 parts of cassava starch, 1 to 3 parts of fish oil, 0.6 part of monocalcium phosphate, 0.3 to 1 part of compound vitamin, 1.2 to 3.7 parts of mineral substance mixture, 2 to 3 parts of EPA (eicosapentaenoic acid) and 3 to 4.4 parts of DHA (docosahexaenoic acid). According to the compound feed disclosed by the invention, the fermented soybean meal and the tenebrio molitor protein are combined to replace part of fish meal, so that the cost of the feed is effectively reduced, the organism immunity and disease resistance of the micropterus salmoides are improved, the intestinal health of the micropterus salmoides is improved, and the culture benefit is comprehensively improved.

The invention relates to the technical field of biology, in particular to a method for relieving high-starch-induced liver injury and glucose metabolism disorder of perches. The feed formula provided by the invention comprises the following components in percentage by weight: 20-22% of cassava starch, 2-6% of mulberry leaf polysaccharide and the like. The mulberry leaf polysaccharide and high-content starch in the feed form efficient synergy, so that the growth performance of the weever is remarkably improved, accumulation of liver glycogen and fat is effectively reduced, and the health condition of the liver is remarkably improved; meanwhile, the blood sugar regulation capability of the weever is also optimized, the insulin resistance caused by high starch diet is reduced, and the insulin sensitivity is enhanced; and by activating a PI3K / Akt signal path and other mechanisms, a glucose metabolism path is optimized, and efficient utilization of energy is promoted. The feed disclosed by the invention is economical and efficient in formula, provides solid scientific support for healthy culture of perches, and powerfully promotes sustainable development of aquaculture industry.

The invention relates to an instant composition with a long-acting oral health-care function for dogs and cats as well as a preparation method and application of the instant composition, and belongs to the technical field of pet food and pet oral care. The composition comprises 20%-30% of whey protein powder, 10%-20% of hydrolyzed gelatin, 1%-3% of low-molecular-weight chitin saccharide gum, 1%-2% of modified cassava starch, 2%-5% of sodium alginate, 1%-3% of fructo-oligosaccharide, 0.03%-0.08% of lysozyme, 0.03%-0.08% of tea polyphenol, 0.05%-0.15% of zinc gluconate, 0.05%-0.1% of persimmon tannin, 3%-5% of tuna hydrolysate, 4%-6% of whole goat milk powder, 2%-4% of skim yoghurt powder and the balance water. The added active ingredients have long-acting slow-release and continuous effects in the formula, oral pathogenic bacteria can be effectively inhibited, dental plaque and dental calculus formation can be reduced, halitosis can be lastingly relieved, and the toothpaste has good market competitiveness.

The invention discloses a type III pullulan hydrolase mutant with improved enzyme activity and a construction method thereof, and relates to the technical field of gene engineering and enzyme engineering. The amino acid sequence of the III type pullulan hydrolase mutant is as shown in SEQ ID NO. 3. According to the present invention, on the basis of the type III pullulan hydrolase TK-PUL from Thermococcus kodakarensis, the type III pullulan hydrolase mutant with the improved enzyme activity is developed through the site-specific mutagenesis, such that the type III pullulan hydrolase mutant with the improved enzyme activity is provided; the specific enzyme activity of the III type pullulan hydrolase mutant to cassava starch is improved by 1.83 times. The cassava starch degradation capacity of the III type pullulan hydrolase mutant is obviously improved, the enzymatic property of the III type pullulan hydrolase mutant meets the requirements of the production and preparation process of the straight-chain maltooligosacharide, and the application potential of the III type pullulan hydrolase mutant in the production and preparation of the straight-chain maltooligosacharide is improved.

The invention belongs to the technical field of oil-proof coatings, and discloses a starch-based oil-proof coating as well as a preparation method and application thereof. The method comprises the following steps: 1) reacting cassava starch with sodium periodate under the condition that the pH is 2-4, centrifugally washing to be neutral, and drying to obtain dialdehyde starch; 2) dispersing dialdehyde starch in water, and then performing gelatinization treatment to obtain a dialdehyde starch solution; dissolving chitosan in an acetic acid solution to obtain a chitosan solution; and 3) mixing the chitosan solution with the dialdehyde starch solution, adjusting the pH value to be acidic, and reacting to obtain the starch-based oil-proof coating. The method is simple, green and environment-friendly; the prepared coating is safe and biodegradable, has excellent oil-proof performance, and improves the tensile strength and tear strength of the paper.

The invention relates to the technical field of environment-friendly materials, and discloses an environment-friendly plastic bag which is of a three-layer composite structure composed of the following raw materials in parts by weight: an outer layer, 60-80 parts of polylactic acid, 40-60 parts of poly (adipic acid) or butylene terephthalate with a thickness ratio of 40%, and a middle layer, 75-90 parts of modified cassava starch, 25-35 parts of polyvinyl alcohol and 3-8 parts of a citrate cross-linking agent with a thickness ratio of 30%. The inner layer comprises 80-95 parts of polyhydroxybutyrate valerate and 15-25 parts of surface treatment calcium carbonate, the thickness ratio of the inner layer is 30%, the three layers are integrally formed through a co-extrusion film blowing process, and a micron-sized groove array is arranged on the surface of the outer layer. The outer layer adopts the blend of polylactic acid and dibutyl phthalate, the brittleness of polylactic acid is made up by utilizing the flexibility of dibutyl phthalate, and meanwhile, the use amount of pure polylactic acid is reduced, so that the cost is reduced by 40% compared with that of a pure polylactic acid bag; and 15 wt% of stearic acid is added into the inner layer polyhydroxybutyrate valerate to treat calcium carbonate, so that the performance is ensured, and the cost is controlled at the same time.

The invention belongs to the field of biomass-based functional materials, relates to a difunctional coating based on enzymolysis modified cassava starch as well as a preparation method and application of the difunctional coating, and innovatively solves the technical problem that a single coating gives consideration to oil prevention and water absorption through a synergistic technical path of pretreatment and composite enzymolysis. The core mechanism is as follows: the starch particle structure is destroyed through pretreatment, and the degradation degree of starch is accurately controlled through the synergistic effect of alpha-amylase and saccharifying enzyme, so that an unexpected technical effect is achieved, and an enzymolysis product with a film-forming skeleton (medium molecular weight dextrin) and a hydrophilic unit (small molecular saccharide) is formed; meanwhile, a compact and continuous network structure can be formed by a film-forming framework, and grease permeation is blocked; and the hydrophilic unit endows the coating with a rapid capillary water absorption effect.

The present application relates to the technical field of degradable packaging. Particularly disclosed are a degradable food container and a preparation method therefor. The degradable food container comprises a paper food container base body and a degradable coating applied on the paper food container base body, wherein the degradable coating is prepared from the following raw materials in parts by weight: 40-50 parts of polylactic acid; 10-15 parts of polybutylene succinate; 15-20 parts of polyglycolic acid; 10-20 parts of cassava starch; 5-8 parts of an external additive; 1.2-1.8 parts of montmorillonite; 0.2-0.8 parts of boron nitride nanotubes; and 1.5-2.5 parts of modified hemp fibers. The preparation method therefor comprises: heating polylactic acid, polybutylene succinate and polyglycolic acid to a molten state, then adding cassava starch and an external additive thereto, finally adding montmorillonite, boron nitride nanotubes and modified hemp fibers thereto, performing extrusion granulation, melting and then coating same on the surface of the paper food container base body, cooling same, and then cutting and forming same into a container to obtain the degradable food container. The degradable food container of the present application can exhibit excellent temperature change resistance when being subjected to temperature change caused by an external environment.

The invention discloses a preparation technology of an animal protein product capable of improving texture uniformity, and belongs to the technical field of animal protein product processing. The process comprises the following steps: S1, putting animal meat paste into a chopping and mixing pot, keeping the temperature of the chopping and mixing pot to be less than or equal to 5 DEG C, mixing and chopping the animal meat paste with 60-70% of formula amount of ice water, and chopping and mixing at 1200rpm for 3-5 minutes to form a protein continuous phase so as to obtain a fine meat paste base; s2, cassava starch and ice water with the amount being 20%-30% of the formula amount are premixed into turbid liquid, the turbid liquid is added into the fine and smooth meat paste base to be chopped and mixed at the speed of 800 rpm for 2-3 minutes, the protein continuous phase is filled with the cassava starch, and a starch filling phase is obtained; and S3, premixing the soybean protein with the remaining formula amount of ice water, adding the mixture obtained in the step S2, and chopping at 500rpm for 1-2 minutes to obtain the meat paste with uniform texture. The method can improve the texture uniformity of the animal protein product.

The invention relates to high-stability amoxicillin powder for livestock. 100 kg of the amoxicillin powder mainly comprises the following raw materials by weight: 10 to 30 kg of amoxicillin, 2.5 to 7.5 kg of potassium clavulanate, 0.6 to 0.7 kg of a hydroxypropyl-beta-cyclodextrin-baicalin and chlorogenic acid compound inclusion body, 1.8 to 2.4 kg of citric acid and calcium carbonate controlled release microspheres, 23.7 to 45 kg of oat beta-glucan, 18 to 25 kg of pre-gelatinized cassava starch, 3 to 4 kg of mannitol, 8 to 12.7 kg of silanized microcrystalline cellulose, and the balance of water. The coating comprises the following components by weight: 0.8 to 1.2 kg of nano silicon dioxide, 2.0 to 2.5 kg of hydroxypropyl methylcellulose and 0.6 to 1.0 kg of zinc diricinoleate. The powder is dried at low temperature, so that the degradation rate of beta-lactam rings is reduced, the stability of amoxicillin is improved, and the bioavailability of the medicine is improved.

The invention relates to the technical field of food, in particular to an instant meat ball capable of being brewed and a production method thereof, and the instant meat ball comprises the following raw materials in percentage by mass: 95.0-98.5% of lean meat; 0.5%-3.0% of ice water; 0.5%-2.0% of crisp garlic bulbs; 0.2% to 1.5% of cassava starch; 0.001% to 0.01% of a colloid; and the balance of seasonings. The colloid is a mixture of konjac gum and xanthan gum; the instant meat ball recovers the elastic and tender taste after being brewed with boiling water for 1-3 minutes and can be directly eaten, low-temperature pulping control is carried out, the material temperature is strictly controlled to be 0-10 DEG C in the pulping process, advanced denaturation of myosin caused by heat generated by friction can be effectively inhibited in the low-temperature environment, and it is ensured that muscle protein is fully dissolved out and a compact gel network is formed; and meanwhile, the low temperature is beneficial to protecting long molecular chains of the konjac glucomannan and the xanthan gum from being degraded by excessive mechanical shearing force, so that the konjac glucomannan and the xanthan gum can play a maximum synergistic gelation role in subsequent processing.

The present disclosure discloses a dust suppression material with a crosslinked network structure and its preparation method. The dust suppression material comprises: 16-20 parts of the cassava starch, 0.2-0.6 parts of the polyvinyl alcohol, 0.1-0.5 parts of the carboxymethyl cellulose, 0.1-0.5 parts of the crosslinking agent, 0.24-0.28 parts of the oxidizing agent, 0.4-0.48 parts of the catalyst, 1.8-2.6 parts of the gelatinizing agent, 0.1-0.3 parts of the water retaining agent, 0.8-1.2 parts of the wetting agent, and the balance is distilled water. The dust suppressant can wet and penetrate into the gaps of coal dust particles, and water molecules form hydrogen bonds with hydrophilic groups in the crosslinked network structure, firmly adsorbed on the network structure, thereby improving the water retention performance of the solidified layer.

The application discloses a method for treating cassava starch wastewater by using a microalgae-fungus symbiotic system, and belongs to the technical field of wastewater biological treatment. The method for treating cassava starch wastewater comprises the following steps: pre-culturing oil-rich neochloris oleoabundans to obtain oil-rich neochloris oleoabundans liquid; pre-culturing aspergillus fumigatus to obtain aspergillus fumigatus spores; mixing the oil-rich neochloris oleoabundans liquid, the aspergillus fumigatus spores and filtered and sterilized cassava starch wastewater, and carrying out shaking bed culture to obtain microalgae-fungus biological balls; carrying out sedimentation and sand filtration treatment on the cassava starch wastewater to obtain pretreated cassava starch wastewater; and adding the microalgae-fungus biological balls into the pretreated cassava starch wastewater, carrying out biological treatment in a photobioreactor, and killing algae bacteria to obtain treated cassava starch wastewater. The method has the advantages of good treatment effect, high economic benefit, low cost and low carbon emission, and aims to solve the problems and defects in the prior art.

This application relates to the field of pesticide compositions, specifically disclosing a water-dispersible granule of chlorpyrifos·acetamiprid and its preparation method, comprising the following raw materials in parts by weight: chlorpyrifos 40-50 parts; acetamiprid 15-25 parts; dispersant 8-12 parts; emulsifier 3-7 parts; synergist 0.5-1 part; mineral oil 3-5 parts; anti-caking agent 3-5.5 parts; cassava starch 2-8 parts; activated carbon powder 5.5-8 parts. The preparation method includes the following steps: S1, mixing the raw materials evenly according to the specified ratio; S2, granulating after air jet milling, drying, and sieving to obtain the water-dispersible granule. This application has the effect of inhibiting the migration of acetamiprid in the soil and reducing pesticide pollution of water resources.

The present disclosure is directed to novel method and formulation for producing egg free and gluten-free bread with a dough system providing an improved texture (softness, chewiness, moisture), shape (large baguette), appearance and taste, used for garlic toast and other applications. The formulation includes a combination of gluten-free flours (tapioca starch-modified, corn starch, potato starch, rice flour), leavening agent, binding agents (hemp heart protein and hydroxypropyl-methylcellulose HPMC), and additives to achieve a desired bread product suitable for individuals with gluten intolerance or celiac disease. The method involves specific steps to mix, proof, shape, and bake the dough to ensure optimal quality and consistency of bread slices used for garlic toast application and other bakery products.

The invention belongs to the technical field of fishery breeding, and provides a low-oxygen-resistant low-fish-meal compound feed as well as a preparation method and application thereof. The low-fish-meal compound feed is prepared from the following raw materials: fish meal, soybean meal, soybean protein isolate, flour, chicken meal, cassava starch, fish oil, soybean oil, lecithin, monocalcium phosphate, compound vitamins, compound minerals, choline, vitamin C, DL-Met, Lys-HCL, Thr, astaxanthin and chrysophyta laminarin. Firstly, the soybean meal, the soybean protein isolate and other composite plant proteins and the chicken meal are adopted to replace traditional fish meal, amino acid composition is balanced, the nutrition proportion of the compound feed is optimized, and the proportion of the fish meal is reduced to 20%; in addition, compound antioxidants such as astaxanthin and chrysophyta laminarin are added into the compound feed disclosed by the invention, so that the oxidation resistance of fish bodies can be remarkably improved.

The present application relates to starch production technical field, especially disclose a kind of green preparation method for modified starch for replacing hydroxypropyl distarch phosphate.The green preparation method, cassava starch is used as raw material, specifically includes the following steps: (1) cassava starch is mixed with water uniformly, and starch suspension is prepared;(2) adding alpha-amylase to starch suspension for glycosidic bond enzymolysis, then passivate enzyme activity;(3) the enzymatic hydrolysate is used to hexose oxidase and oligomeric glucan is subjected to lactonization reaction, then passivate enzyme activity;(4) the final enzymatic hydrolysate is centrifuged, washed with water, the precipitate is freeze-dried, and enzyme modified cassava starch is obtained.The paste viscosity, freeze-thaw stability, shear resistance, anti-aging and other chemical properties of the enzyme modified cassava starch prepared by the present application are close to or better than hydroxypropyl distarch phosphate, and the preparation process is simple, short cycle, green and safe, low in production cost, simple in equipment, suitable for industrial production, and safe and pollution-free during production.

The invention provides a graphitized carburant and a preparation method thereof, and relates to the technical field of carburant preparation. The graphitization carburant is prepared from pretreated petroleum coke, purified graphite electrode waste, wood charcoal, carboxymethyl cellulose sodium and modified starch, wherein the pretreated petroleum coke is obtained by soaking petroleum coke in alkali liquor, cleaning with ethanol, drying, filling oxygen under the pressure of 3-5 Mpa for high-pressure treatment and calcining; the modified starch is obtained by gelatinizing cassava starch, performing microwave shaping and crushing. According to the method, the defects in the prior art are overcome, the purity of the carburant can be effectively guaranteed, meanwhile, the recarburization effect of the carburant is further improved, and the economic benefit of overall production is improved.

The invention relates to a biodegradable heat-sealing film and a preparation method thereof, and belongs to the technical field of heat-sealing films, the biodegradable heat-sealing film is prepared from the following raw materials by weight: 45-55 parts of polylactic acid, 6-12 parts of modified tapioca flour, 5-12 parts of toughening fiber, 8-18 parts of glycerin, 0.5-1.5 parts of sorbitol, 3-5 parts of citric acid, and 4-8 parts of stearic acid; wherein the modified tapioca flour is obtained by performing heat-moisture treatment and oxidation treatment on tapioca starch, and the toughened fibers are prepared by performing blasting and purification treatment on plants serving as raw materials. The biodegradable heat-sealing film is prepared through the synergistic effect of the polylactic acid, the modified tapioca flour and the plant-based toughening fibers in a specific proportion, and the tapioca flour is modified through damp heat and oxidation, so that the compatibility and degradation performance of the tapioca flour and the polylactic acid are improved; the toughening fiber is obtained by steam explosion and purification of various plants, and the addition of the toughening fiber can provide an anchor point for the biodegradable heat-sealing film, so that the biodegradable heat-sealing film is not easy to generate a longer fracture when being pulled.