27 results about "Zinc chelate" patented technology

The invention belongs to the technical field of bioactive peptide preparation and food processing, and discloses an ultrasonic-assisted preparation method of giant salamander muscle peptide zinc chelate. The preparation method comprises the following steps: pretreating giant salamander muscles; preparing giant salamander muscle polypeptide; preparing a chelate product of giant salamander muscle peptide and zinc sulfate heptahydrate under an ultrasonic condition; and carrying out alcohol precipitation separation on a chelation reaction product. The giant salamander muscle peptide zinc chelate prepared by the invention can be directly used as a natural nutrition enhancer to timely supplement nutritional ingredients necessary for a human body. The preparation method provided by the invention has the advantages of short production cycle and no pollution to the environment, and the obtained product has stable performance and high absorption efficiency and can be widely applied to the fields of foods, medicines and health care.

This invention belongs to the field of food processing technology, specifically providing a method for preparing antioxidant zinc chelate peptides, comprising the following steps: inoculating a protein solution with a compound microbial agent for fermentation; the compound microbial agent includes *Lactobacillus plantarum* and *Saccharomyces cerevisiae*; after enzymatic hydrolysis and debittering of the fermentation broth, the antioxidant peptides are separated and dried to obtain the antioxidant peptides; the antioxidant peptides are dissolved in water to prepare a peptide solution, and a zinc source is added to the peptide solution to carry out a chelation reaction; the supernatant is collected, and the precipitate is collected by alcohol precipitation to obtain the antioxidant zinc chelate peptides. This method uses low molecular weight peptides prepared by dual-microbial synergistic multi-enzyme hydrolysis as chelating ligands, which chelate with zinc ions under mild conditions to maximize the preservation of biological activity, achieving a dual enhancement of chelation capacity and antioxidant activity, and achieving a unity of high chelation rate, high antioxidant activity, high stability and good flavor. The process is green, safe, and leaves no organic solvent residue, making it suitable for large-scale industrial production.

The invention discloses a lutein composition for relieving asthenopia and a preparation method of the lutein composition, and belongs to the field of functional foods. Phycocyanin and kelp polyphenol are mixed and react to obtain modified phycocyanin; fucoidin and beta-glucuronidase are mixed and react to obtain modified fucose; mixing the fish collagen peptide and zinc chloride to react to obtain a collagen peptide-zinc chelate; the xanthophyll siliceous cage compound and the modified phycocyanin are mixed and react to obtain a first compound; mixing and reacting the first compound and modified fucose to obtain a second compound; mixing and reacting the second compound, collagen peptide-zinc chelate and krill oil to obtain a lutein compound; mixing and reacting the second compound, collagen peptide-zinc chelate and krill oil, adding trehalose, and mixing and reacting to obtain a xanthophyll compound; and mixing the xanthophyll compound and maltodextrin to obtain the xanthophyll composition.

The invention relates to platycodon grandiflorum polysaccharide as well as a preparation method and application thereof. The structural formula of the platycodon grandiflorum polysaccharide is shown in the specification. The preparation method of the platycodon grandiflorum polysaccharide comprises the following steps: extracting platycodon grandiflorum crude polysaccharide from degreased platycodon grandiflorum by adopting a water extraction and alcohol precipitation method, and then decoloring, deproteinizing and purifying to obtain the platycodon grandiflorum polysaccharide PGP. And further preparing a platycodon grandiflorum polysaccharide calcium chelate and a platycodon grandiflorum polysaccharide zinc chelate by utilizing the platycodon grandiflorum polysaccharide PGP. Experiments prove that the prepared platycodon grandiflorum polysaccharide calcium chelate has an anti-osteoporosis effect, and the platycodon grandiflorum polysaccharide zinc chelate has immunoregulatory activity and a probiotic effect of synchronously regulating intestinal microecology. The platycodon grandiflorum polysaccharide calcium / zinc chelate provided by the invention is beneficial to development and application of novel calcium / zinc supplementation agents.

The present invention relates to the field of polypeptide compositions, and specifically relates to a polypeptide metal chelate and the use thereof in the field of cosmetics. The polypeptide metal chelate is formed by means of the chelation of a polypeptide compound with a metal ion compound. A structure of the polypeptide compound is: [γ-Glu]n-AA, wherein n≥1, and AA is selected from glycine, alanine, valine, leucine, isoleucine, methionine (Met), proline, tryptophan, serine, tyrosine, cysteine, phenylalanine, asparagine, glutamine, threonine, aspartic acid, glutamic acid, lysine, arginine or histidine. The polypeptide zinc chelate prepared by the present invention has significant oil-controlling and anti-inflammatory effects, and can be compounded with other raw materials to prepare cosmetics with oil control and acne removal effects.

The invention provides a novel hermetia illucens larva peptide zinc chelate and a preparation method and application thereof, and belongs to the technical field of food and medicines.The preparation method comprises the following steps that hermetia illucens larva protein is subjected to enzymolysis through protease, and hermetia illucens larva peptide with the molecular weight being 900-2000 Da is obtained; after the hermetia illucens larva peptide is mixed with a zinc source, the pH is adjusted to 4.0-7.0, a chelation reaction is induced, and the novel hermetia illucens larva peptide zinc chelate is obtained. According to the method, efficient chelating of peptide zinc of the hermetia illucens larvae is achieved through directional enzymolysis and pH induction, a specific molecular weight peptide fragment (900-2000 Da) is obtained through directional enzymolysis, and the selectivity and efficiency of zinc chelating are improved. When the pH is 4.0-7.0, the reaction conditions are optimized by inducing chelation, and the chelation rate can reach 65%-85%. The binding site analysis proves that the zinc is coordinated with carboxyl and amino in the peptide, and the scientificity of the product is enhanced. Stability research shows that the product keeps stable under a wide range of conditions and is suitable for food and nourishment.

The invention provides a method for determining cysteamine chelated zinc in premixed feed, and belongs to the technical field of analysis and detection. The invention provides a method for determining cysteamine chelated zinc in premixed feed, which comprises the following steps: preparing a cysteamine chelated zinc sample to obtain a near-infrared analysis and prediction sample set; performing first near-infrared analysis on the near-infrared analysis prediction sample set, and obtaining a calibration model according to obtained data; performing second near-infrared analysis on the premixed feed to obtain data of the sample to be detected; the premixed feed contains cysteamine chelated zinc; and obtaining the content of cysteamine chelated zinc in the premixed feed according to the data of the sample to be detected and the calibration model. The determination method provided by the invention has the advantages of no damage, high efficiency, low cost, environmental protection and accurate result.

A composition of Prunella vulgaris extract and polypeptide zinc chelate, and the use thereof in the field of cosmetics. The Prunella vulgaris extract has a saponin content of not less than 1.5 mg / mL and a flavonoid content of not less than 1.0 mg / mL. The polypeptide zinc chelate is formed by means of the chelation of a polypeptide compound [γ-Glu] n-AA with a zinc ion compound. Cosmetics containing the composition of Prunella vulgaris extract and polypeptide zinc chelate can be used for skin oil control and acne removal.

The invention discloses a ginkgo peptide zinc chelate with a dietary fiber adsorption resisting effect and a preparation method of the ginkgo peptide zinc chelate, and belongs to the technical field of deep processing of forest products. The gingko peptide zinc chelate is prepared by carrying out coordination reaction on gingko peptide and zinc sulfate under specific conditions, and after the gingko peptide zinc chelate is chelated with the gingko peptide, the stability of zinc ions in a digestion environment is remarkably improved, and the precipitation phenomenon of the zinc ions in gastrointestinal tracts is effectively inhibited; the technical defects that a traditional inorganic zinc preparation is high in gastrointestinal irritation, low in bioavailability and the like are overcome. Meanwhile, the ginkgo peptide zinc chelate disclosed by the invention has excellent dietary fiber adsorption resistance, and the bioavailability of zinc can be remarkably enhanced. Therefore, the ginkgo peptide zinc chelate provided by the invention can be widely applied to the fields of special dietary foods, functional health foods, nutrition fortified foods and the like, and has a good application prospect.

The present application belongs to the technical field of catalysts, and particularly relates to a preparation method of a catalytic cracking reaction composite metal catalyst and application thereof in preparation of vinylidene chloride, the preparation method of the catalytic cracking reaction composite metal catalyst comprising the following steps: (1) mixing a chitosan solution with an acetic acid solution, adjusting pH to obtain a mixed solution, and then adding a zinc lactate solution into the mixed solution and mixing uniformly to obtain a zinc chelate solution; (2) mixing the zinc chelate solution, an aluminum-containing compound, a silicon-containing compound and a template agent to form a slurry, forming molecular sieve particles through spray granulation, crystallizing, washing and drying to obtain zinc-containing molecular sieve microspheres; (3) mixing cesium sulfate, oleic acid and octadecene to obtain a cesium oleate solution through a mixing reaction; and (4) dispersing the zinc-containing molecular sieve microspheres into the cesium oleate solution to react, and obtaining the catalytic cracking reaction composite metal catalyst. The present application optimizes process conditions in the preparation process, and forms a perfect catalytic system.

This invention discloses a lutein composition for relieving eye fatigue and its preparation method, belonging to the field of functional foods. The process involves: reacting phycocyanin and kelp polyphenols to obtain modified phycocyanin; reacting fucoidan and β-glucuronidase to obtain modified fucose; reacting fish collagen peptides and zinc chloride to obtain collagen peptide-zinc chelate; reacting lutein silica cage complex and modified phycocyanin to obtain a first complex; reacting the first complex and modified fucose to obtain a second complex; reacting the second complex, collagen peptide-zinc chelate, and krill oil to obtain a lutein complex; reacting the second complex, collagen peptide-zinc chelate, and krill oil, then adding trehalose to obtain the lutein complex; and finally mixing the lutein complex with maltodextrin to obtain the lutein composition.

This invention relates to the field of functional food processing technology, and discloses a method for preparing and applying corn peptides that lower blood pressure. First, microwave pretreatment is used to improve the dissolution rate of corn protein. Then, dynamic temperature-controlled synergistic enzymatic hydrolysis combined with time-segmented microwave assistance is used to directionally release hydrophobic ACE-inhibiting peptides. Surface-modified magnetic materials are used to perform biomimetic affinity adsorption and magnetic separation purification of the target peptides, achieving highly selective enrichment of active ingredients. Finally, the peptides are compounded with stabilizers such as tea polyphenol-zinc chelate and Monascus purpureus extract to form a charge-matched micelle protection system. Through dynamic temperature-controlled synergistic enzymatic hydrolysis and biomimetic magnetic separation processes, efficient release and functional enhancement of active peptides are achieved, simultaneously improving ACE inhibitory activity and storage stability. The charge-matching of stabilizers and the synergistic design of components overcome the absorption barrier of active peptides. A multi-pathway regulatory system is constructed, integrating "blood pressure lowering, lipid lowering, and antioxidant" functions. Experiments have demonstrated that this application has a blood pressure lowering effect.

The invention relates to the technical field of animal husbandry and veterinary feed, and discloses a feed additive for improving sow PSY and a preparation method thereof.The feed additive is prepared from, by mass, 40%-50% of functional amino acid compounds, 20%-30% of slow-release fatty acid microcapsules, 5%-10% of melatonin-zinc chelates and 15%-25% of synergistic auxiliaries; the functional amino acid compound is formed by compounding 5%-8% of L-tryptophan, 10%-15% of L-arginine, 8%-12% of L-histidine and 15%-20% of L-glutamic acid according to the mass ratio of (5-8): (10-15): (8-12): (15-20), and the purity of each amino acid is greater than or equal to 98%; the core of the sustained-release fatty acid microcapsule is 8%-12% of conjugated linoleic acid and 12%-18% of omega-3 polyunsaturated fatty acid, the wall materials are 5%-8% of modified starch and 3%-5% of sodium caseinate, the particle size of the microcapsule is 20-50 microns, the 2-hour gastric acid environment release rate is smaller than or equal to 30%, and the 8-hour intestinal environment accumulative release rate is larger than or equal to 85%. According to the invention, the cooperative design of the functional amino acid compound and the slow-release fatty acid microcapsules is adopted, so that the reproductive performance of sows and the development of piglets are comprehensively improved.

An oral anti-aging combination based on the triple interaction of NAD + -SIRT1-GH, characterized in that it comprises the following components: NAD + -Precursor, resveratrol or an esveratrol-containing reagent, astaxanthin, grape seed extract, vitamin C, L-citrulline, L-ornithine, hydrolyzed collagen, hydrolyzed type II collagen, a zinc chelate and sodium hyaluronate.

The invention belongs to the technical field of bioactive peptide preparation and food processing, and particularly relates to a giant salamander muscle peptide zinc chelate cranberry juice beverage and a preparation method thereof. Giant salamander peptide is extracted from giant salamander muscle, zinc ions are introduced for chelation, the giant salamander muscle peptide zinc chelate is prepared, finally, the giant salamander muscle peptide zinc chelate is compounded with cranberry juice, and then the giant salamander muscle peptide zinc chelate cranberry juice beverage is developed. Compared with a common fruit juice beverage or a single peptide functional beverage, the giant salamander muscle peptide zinc chelate cranberry juice beverage prepared by the preparation method disclosed by the invention is rich in nutritional value, unique in flavor and mouth feel, green and healthy in formula and wide in product application scene, the chelate is high in stability in a beverage system, and the retention rate of zinc is high after high-temperature sterilization and normal-temperature storage; and the product has stable quality in the shelf life, and is suitable for large-scale industrial production.

The invention discloses a preparation method of a small peptide zinc feed additive for improving immunity of broiler chickens, and relates to the technical field of feed additives.The method comprises the steps that soybean protein isolate and casein are mixed and then subjected to primary enzymolysis through pepsin, and then synergistic enzymolysis is conducted through neutral protease and flavourzyme; and carrying out ultrafiltration to obtain a small peptide component with the molecular weight of less than 1000 Daltons, chelating the small peptide component with zinc sulfate heptahydrate according to a molar ratio of 1: 2, carrying out spray drying to obtain a finished product, finally carrying out quality detection on the finished product, and carrying out sealing and dark preservation to obtain a qualified product. The invention aims to solve the problems of uncontrollable immune active components, insufficient efficacy verification and non-environment-friendly process in the existing feed additive, and can directionally enrich Arg-Gly-Asp, Lys-Pro and other immune active peptide fragments to form a high-stability small peptide zinc chelate, significantly improve the antibody titer, serum IgG level and intestinal barrier function of the broiler Newcastle disease, and improve the immunity of the broiler Newcastle disease. Meanwhile, the process is clean, low in cost and suitable for industrial production.

The invention relates to the technical field of composite materials, and discloses a copper-zinc chelated composite material, a preparation method thereof and an application of the copper-zinc chelated composite material in a feed. The preparation method comprises the following steps: modifying rice bran meal by adopting physical and chemical methods to obtain modified rice bran meal; further modifying the composition of the rice bran meal by adopting a biological enzymolysis method to obtain functionalized rice bran meal; reacting copper sulfate and zinc sulfate with glycine and calcium carbonate, ending the reaction when no bubbles are generated in the system, and centrifuging to obtain a copper ion solution and a zinc ion solution; and mixing the functionalized rice bran meal with a copper ion solution and a zinc ion solution, adding a lactic acid bacteria solution for fermentation, and after the reaction is finished, obtaining the efficient copper-zinc chelating composite material. The high-efficiency copper-zinc chelated composite material can be used as a trace element supplement in a feed.

The invention relates to an additive of a charge generation material in an organic photoconductor and the organic photoconductor, and belongs to the technical field of organic photoconductors. Aiming at the technical problems that Y crystal form titanyl phthalocyanine serving as a charge generation material in a charge generation layer in an organic photoconductor is large in dark attenuation and low in sensitivity in a high-temperature and high-humidity environment, bottom ash of a printed product is caused, and printing is light, a fluorine-containing polyurethane-acrylate copolymer and a benzotriazole-zinc chelate are added as additives; the weather resistance of the organic photoconductor is improved, so that the organic photoconductor keeps good performance in a high-temperature and high-humidity environment; the structural formula of the fluorine-containing polyurethane-acrylate copolymer is as shown in the following formula (I); in the formula (I), Rf is a perfluorinated linear alkyl group, and the values of m, n and k are all integers.

The invention relates to the technical field of bioactive peptide preparation and food processing, and particularly provides giant salamander peptide and zinc chelating peptide as well as a preparation method and application thereof. The technical problems that the deep processing level of existing giant salamanders is low, the bioavailability of traditional zinc supplements is low, and existing cranberry juice is single in nutrition function are solved. The giant salamander peptide is extracted from giant salamander muscles, and the zinc chelating peptide is prepared from the following raw materials in parts by mass: 1-5 parts of giant salamander peptide and 1 part of zinc sulfate heptahydrate. According to the invention, the giant salamander peptide and zinc sulfate heptahydrate are subjected to chelation reaction according to the proportion to prepare the zinc chelating peptide, and the zinc chelating peptide is applied to cranberry juice. According to the method, the deep processing way of the giant salamander raw materials is effectively expanded, the market category of giant salamander related high-added-value products is enriched, the nutritional quality of the cranberry beverage can be remarkably improved, the content of flavones and total phenols in the beverage is effectively increased, the requirements of consumers for healthy functional foods are met, and the method has wide application prospects and market value.

The application discloses a casein peptide-zinc chelate TEDELQDKIHP-Zn for promoting zinc absorption, and an amino acid sequence of a polypeptide part of the casein peptide-zinc chelate is Thr-Glu-Asp-Glu-Leu-Gln-Asp-Lys-Ile-His-Pro; and a polypeptide and zinc chelate have a chelate ratio of 1:0.7. The casein peptide-zinc chelate TEDELQDKIHP-Zn has high gastrointestinal digestion stability, good absorption performance, and an effect of promoting zinc absorption is obviously better than that of traditional zinc supplements, such as zinc sulfate and zinc gluconate. The casein peptide-zinc chelate has very important significance for developing food, health products and medicines with a zinc supplement function.

The invention provides dictyophora indusiata polysaccharide zinc and a preparation method and application thereof, and belongs to the technical field of zinc polysaccharide preparation, the dictyophora indusiata polysaccharide zinc is formed by chelating a dictyophora indusiata polysaccharide solution and a solution containing zinc ions, and the ratio of initial zinc ions to dictyophora indusiata polysaccharide is 1: (60-100). According to the invention, the influence of different chelating amounts on the structure, physicochemical properties, oxidation resistance and bioavailability of the polysaccharide zinc chelate is researched; and further determining the optimal chelating amount of the dictyophora indusiata polysaccharide zinc. According to the dictyophora indusiata polysaccharide zinc provided by the invention, the synergistic anti-oxidation effect of dictyophora indusiata polysaccharide and zinc is exerted through moderate zinc modification, so that DP-Zn more remarkably reduces the ROS level in fibroblasts treated by H2O2, and the dictyophora indusiata polysaccharide zinc has good biological safety, also has better bioavailability in in-vitro digestion simulation and has a wide application prospect.

The invention discloses a preparation method of high-activity oyster peptide capable of accurately enriching arginine and improving male functions, which comprises the following steps: adding trypsin into oyster homogenate for enzymolysis, selectively cutting carboxyl terminal peptide bonds of arginine, centrifugally collecting supernate, and adding compound enzyme to obtain secondary enzymatic hydrolysate; and proportionally adding zinc sulfate into the oyster peptide solution of which the molecular weight is precisely controlled to obtain an oyster peptide finished product. The technical scheme of the invention can achieve the following technical effects: the arginine content of the finished product is gt through a three-step enzymolysis mode; the content of the oyster peptide is 9g / 100g, and the oyster peptide and zinc ions form a stable peptide-zinc chelate through a zinc chelation reaction, so that the zinc content of the product is gt; the yield is 1800 mg / kg; nitrogen protection and lipase degreasing are carried out in the whole enzymolysis process, and fat oxidation and the like are prevented. The oyster peptide finished product prepared by the scheme can be added into food, health care products and medicines, and the invention provides the application of the oyster peptide in improving the male sexual function.

The invention discloses a soybean seed coat polysaccharide zinc chelate which is prepared by taking soybean seed coat polysaccharide and zinc sulfate as raw materials in a system with the pH value of 5.5-6.5 in the presence of sodium citrate. The invention discloses a preparation method of a soybean seed coat polysaccharide zinc chelate, which comprises the following steps: dissolving soybean seed coat polysaccharide in water to obtain a soybean seed coat polysaccharide solution, and adjusting the pH value to 6.0-6.2; the method comprises the following steps: dissolving zinc sulfate and sodium citrate in water to obtain a mixed solution of zinc sulfate and sodium citrate, and adjusting the pH value to 5.5-6.0; dropwise adding a mixed solution of zinc sulfate and sodium citrate into the soybean seed coat polysaccharide solution while stirring, continuously stirring after dropwise adding, and maintaining the pH value at 5.5-6.5; and dialyzing in pure water, centrifuging, and freeze-drying supernate to obtain the soybean polysaccharide zinc chelate. The sodium citrate is introduced, so that the irreversible gelation phenomenon caused by excessive zinc at the moment that the zinc-containing compound solution reacts with the polysaccharide is avoided.

The invention provides a plant growth-promoting stress-resistant agent containing micromolecular collagen active peptide and a preparation method and application thereof, and the plant growth-promoting stress-resistant agent comprises the following raw materials by weight: 5-10% of micromolecular collagen active peptide, 4-8% of soybean peptide-zinc chelate, 3-12% of mineral element, 2-5% of seaweed extract, 1-3% of chitosan oligosaccharide, and the balance of deionized water. The growth-promoting stress-resistant agent disclosed by the invention realizes an integrated function of nutrition supply, efficient trace element delivery and stress-resistant protection through multi-component synergy, can remarkably improve the crop yield and enhance the stress resistance, and is environment-friendly, simple and convenient in process and suitable for various crops and stress planting scenes.

The invention belongs to the technical field of seed cultivation, and relates to a hormone pretreatment composition and method for promoting rapid germination of grape seeds. The composition is prepared by dissolving a chitosan oligosaccharide-zinc chelate solution, multi-hormone-trehalose microcapsule powder and APG (alkyl polyglucoside) into water. Wherein the multi-hormone-trehalose microcapsule powder is prepared from gibberellin, cytokinin, salicylic acid, melatonin and trehalose through shear mixing and freeze drying, hormone can be slowly released, and the stability and bioavailability are improved; the chitosan oligosaccharide-zinc chelate can enhance the permeability of seed coats and stimulate seed defense signals. The treatment method comprises the steps of seed short-term cold shock, composition seed soaking, ultrasonic-assisted absorption and variable-temperature illumination seedling raising. The method effectively overcomes the problems of easy degradation, uneven release, difficult seed coat penetration and the like of active components in traditional hormone treatment, significantly improves the seed germination speed, uniformity and seedling stress resistance, and is suitable for efficient large-scale seedling culture of grape seeds.

The invention relates to a stain-resistant antibacterial separation membrane with the surface grafted with a polysaccharide zinc chelate and a preparation method thereof.The stain-resistant antibacterial separation membrane is obtained by covalently connecting carboxyl groups on the surface of a matrix separation membrane and hydroxyl groups of the polysaccharide zinc chelate, and the matrix separation membrane is immersed in an activating solution for activating the carboxyl groups on the surface of the membrane; and immersing the substrate separation membrane into a polysaccharide zinc chelate reaction solution, and grafting the polysaccharide zinc chelate on the surface of the substrate separation membrane through esterification reaction to obtain the stain-resistant antibacterial separation membrane with the surface grafted with the polysaccharide zinc chelate. The anti-pollution capacity can be remarkably improved, the anti-pollution performance on various pollutants such as surfactants and protein is achieved, the flux recovery rate after water cleaning is high, and meanwhile the membrane has the good antibacterial performance through coordination zinc ions on the surface of the membrane; the preparation method is wide in raw material selection range, simple and mild in process, high in designability and easy to industrialize, and the prepared stain-resistant and antibacterial separation membrane is remarkably improved in stain-resistant and antibacterial effects and stable in structure.