99 results about "Chelated calcium" patented technology

The invention discloses a method for promoting dissolution of eggshell membrane protein and preparing chelated calcium through high-pressure crushing. Comprising the following steps: separating and drying eggshells and eggshell membranes of egg shells, and respectively carrying out superfine grinding to obtain eggshell powder and eggshell membrane powder; adding water into the eggshell membrane powder, carrying out high-pressure homogenization, and centrifuging to obtain an eggshell membrane solution; adding eggshell powder into the eggshell membrane solution, adjusting the pH value to 1-3, and adding pepsase for reaction; after the reaction, adjusting the pH value of the eggshell membrane solution to 6.5-7.5, and adding trypsin for reaction; and after the reaction, inactivating the enzyme, centrifuging to take a supernatant, adding absolute ethyl alcohol into the supernatant for alcohol precipitation, and centrifuging to obtain a precipitate, namely the chelated calcium. The technical problem that the eggshell membrane protein is difficult to dissolve out is solved, and a new way is provided for industrial extraction of the eggshell membrane soluble protein.

The invention discloses a water and fertilizer management method for transplanted high-yield indica type two-line hybrid rice, and belongs to the technical field of rice cultivation. Comprising the following steps: (1) applying citric acid chelated calcium magnesium phosphate fertilizer to soil before transplanting; (2) applying coated controlled-release urea and a silicon-zinc fertilizer on the third day after transplanting; (3) when the tiller number reaches 2650,000-2750,000 plants / hm < 2 >, starting intermittent light field drying for three times, and deeply applying potassium magnesium sulphate before field drying; (4) laterally and deeply applying urea and a boron-humic acid chelate when tips of two inverted leaves are exposed; (5) spraying an aqueous solution in a full heading stage, wherein the aqueous solution comprises monopotassium phosphate, chelated zinc and brassinolide. Through staged precise fertilization, special chelating / controlled release fertilizer and water and fertilizer-field drying cooperation, the method has the advantages that the fertilizer utilization rate is increased, the nutritional requirements of rice in each growth period are precisely matched, and water and fertilizer cooperative management is optimized.

The invention relates to the technical field of compound fertilizers, and discloses a boron-zinc-molybdenum synergistic compound fertilizer, which is prepared from the following raw materials in parts by weight: calcium nitrate, ammonium polyphosphate, potassium sulfate, magnesium sulfate, disodium octoborate tetrahydrate, sugar alcohol chelated zinc, sodium molybdate and a synergistic auxiliary agent, the feed additive is prepared from a feed additive, an activator, 5-alginic acid oligosaccharide, aminolevulinic acid, sugar alcohol chelated magnesium, an antagonist, a stress-resistant enhancer and a coating material. According to the boron-zinc-molybdenum synergistic interaction compound fertilizer and the preparation process thereof, the disodium octoborate tetrahydrate, the sugar alcohol chelated zinc and the sodium molybdate are compounded according to a specific proportion, antagonism is avoided through proportion limitation, the synergistic effect of the three elements is remarkably enhanced, and the problem that a single element is insufficient or excessive is solved; chelated elements such as sugar alcohol chelated zinc and sugar alcohol chelated magnesium are combined with an activating agent (humic acid chelated calcium and silica sol) to form a gel-state chelate, so that the trace elements can be prevented from being fixed by soil, and the transfer efficiency of the trace elements in crops is improved.

The invention relates to the technical field of concrete, and particularly discloses super-retarded concrete for an ultra-large pile and a preparation method of the super-retarded concrete. The super-retarding concrete for the ultra-large pile is prepared from the following raw materials in parts by mass: 320 to 400 parts of a cementing material, 1820 to 1960 parts of aggregate, 20 to 28 parts of an inorganic-organic hybrid retarding reinforcing agent, 7.2 to 11.6 parts of a polycarboxylate superplasticizer and 85 to 98 parts of water, the inorganic-organic hybrid delayed coagulation enhancer is prepared by carrying out in-situ free radical polymerization reaction on a hydroxyl acrylate monomer, acrylamide and nano silicon dioxide. According to the inorganic-organic hybrid retarding reinforcing agent, a hybrid substance is formed through a chemical bond, an organic phase is chelated with calcium ions to realize retarding and does not excessively inhibit cement particles, inorganic phase nano silicon dioxide has no agglomeration risk, gaps are filled, a stable product is generated to resist alkali erosion, and the super retarding performance and the long-term strength of concrete are both considered; and the service life of the ultra-large pile is prolonged.

The invention relates to the technical field of agriculture, in particular to a plant nutrient solution for saline-alkali soil improvement and a preparation method thereof. The invention relates to a preparation method of a plant nutrient solution for improving saline-alkali soil. The preparation method comprises the following steps: preparing NO3-intercalated layered double hydroxides and acid modified calcium-based montmorillonite; preparing humic acid chelated calcium magnesium powder; preparing a binary compound; and preparing the plant nutrient solution. The preparation method comprises the following steps: preparing NO3-intercalated layered double hydroxides from calcium nitrate tetrahydrate and aluminum nitrate nonahydrate, carrying out acid modification on calcium-based montmorillonite by using dilute sulphuric acid, purifying humic acid, and mixing with calcium chloride and magnesium chloride hexahydrate to prepare humic acid chelated calcium magnesium powder. Finally, the three components are added into pig excrement fermentation liquor to prepare a plant nutrient solution, an adsorption-replacement-leaching closed loop can be formed, the desalination and alkali reduction efficiency is remarkably improved, the soil structure is improved, the effect of synergistically improving the saline-alkali soil is achieved, and therefore plant growth is promoted.

The invention discloses a microbial agent for improving the yield and quality of strawberries and a preparation method and application thereof, and belongs to the technical field of microorganisms. The microbial agent comprises the following raw materials in parts by weight: 40-50 parts of a compound microbial agent, 0.3-0.5 part of xanthan gum, 1.5-2 parts of glycerol, 4-5 parts of a citric acid-sodium citrate buffer solution, 1-1.5 parts of potassium humate, 0.3-0.5 part of monopotassium phosphate, 0.2-0.3 part of chelated calcium magnesium and the balance of water, wherein the total parts by weight of the raw materials are 100; the compound microbial agent is prepared from arthrobacter Xinjiang, linear Prussella bursa-pastoris and bacillus coagulans. The microbial agent disclosed by the invention can be used for effectively preventing and treating strawberry diseases, including root rot, fusarium wilt, gray mold and anthracnose; through the synergistic effects of hormone secretion, nutrient activation, disease inhibition and the like, the microbial agent comprehensively promotes root development and nutrient absorption of strawberry plants, promotes strawberry growth, remarkably improves the strawberry yield and fruit quality, and meanwhile remarkably reduces the strawberry storage rotting rate.

The invention provides a foliage dressing method for promoting quality improvement and fruit cracking prevention of early cultivation of sweet cherries, and belongs to the technical field of sweet cherry planting management. Comprising the following steps: after autumn, ditching around sweet cherry trees and applying an organic fertilizer; a high-nitrogen macroelement water-soluble fertilizer is applied along with drip irrigation before and after germination; after flowers fall, in a young fruit period and in a fruit core hardening period, flushing calcium ammonium nitrate for 2-3 times; after flowers of the sweet cherries fall, foliar fertilizer is sprayed five times; applying potassium nitrate when the fruits turn from green to white; potassium sulfate is applied in the fruit changing from white to red; after the fruits are harvested, the balanced macroelement water-soluble fertilizer is applied by flushing for 1-2 times. According to the invention, a leaf fertilizer is set as an organic liquid chelated calcium fertilizer, a brand-new chelating technology and an acidification adsorption technology are combined, an organic chelating agent is taken as a carrier, and organic liquid chelated calcium prepared by an advanced process is adopted, so that fruits can rapidly absorb the organic liquid chelated calcium and can rapidly transfer the organic liquid chelated calcium in a plant body, and calcium contained in a part needing calcium is efficiently absorbed and utilized; the sugar can be effectively stored in fruit organs of plants.

The invention belongs to the technical field of food processing methods, and particularly relates to a preparation method of squid skin chelated calcium peptide powder. Squid skin is used as a raw material, small-molecular-weight squid skin peptide powder is obtained through enzymolysis, ultrafiltration and membrane separation, then the small-molecular-weight squid skin peptide powder, calcium chloride and ethyl alcohol are subjected to a chelation reaction and protein precipitation, centrifugation is conducted, precipitates are collected, and the squid skin chelated calcium peptide powder is obtained. According to the preparation method, the utilization rate of the squid skin leftovers is increased, and active substances contained in the squid skin leftovers are fully developed and utilized. Moreover, according to the embodiment, the operation is simple, and the prepared squid skin chelated calcium peptide powder has relatively strong oxidation resistance and relatively high calcium chelation rate, and the highest calcium chelation rate can reach 63.18%; and the calcium absorption rate and the calcium content are relatively high and can reach 77.14% and 65.82 mg / g respectively.

The invention belongs to the technical field of biomedical materials, and particularly relates to a mesoporous silica functional filler and a preparation method thereof, and a composite resin material and a preparation method and application thereof. The mesoporous silica functional filler provided by the invention has remineralization performance and pH response type. Functional modification is carried out on the surface of mesoporous silica, the modified mesoporous silica can load phosphorylated chitosan / amorphous calcium phosphate through electrostatic attraction, and the pH response performance is given to the modified mesoporous silica. The phosphorylated chitosan can simulate the effect of dentin matrix protein 1, can regulate the remineralization process of dentin, and can chelate calcium ions to stabilize amorphous calcium phosphate in the solution to form an amorphous nano precursor. The polyelectrolyte may be replaced with a biomimetic analog to initiate the remineralization process. The size of the mineral precursor and the deposition sequence and layer of the mineral precursor inside and outside the collagenous fiber can be regulated and controlled, and meanwhile nucleation and growth of apatite crystals inside and outside the collagenous fiber can be promoted.

The invention discloses a calcium-containing spray for preventing grape fruit cracking and a preparation method thereof, and belongs to the field of grape fruit cracking prevention, and the calcium-containing spray comprises the following components in parts by mass: 3-9 parts of bioactive peptide-polysaccharide chelated calcium, 5-8 parts of a cationic surfactant, 1-5 parts of a water-retaining agent, 0.3-0.85 part of sodium salt, 0.01-0.5 part of a growth promoter, 0.05-1 part of potassium fulvate and 50-800 parts of deionized water. The preparation method comprises the following steps: dissolving the bioactive peptide-polysaccharide chelated calcium, the sodium salt, the growth promoter and the potassium fulvate in deionized water, and then adding the water-retaining agent and the cationic surfactant to obtain a mixed solution; stirring the mixed solution at 60-85 DEG C, and then standing to obtain the calcium-containing spray for preventing grape fruit cracking, after spraying, a layer of uniform protective film can be formed, moisture permeation and external mechanical damage can be effectively reduced, osmotic pressure balance inside and outside cells can be effectively regulated, the stability of a cell structure can be maintained, and the grape cracking rate can be remarkably reduced.

The invention belongs to the technical field of soil remediation, and provides a preparation method of a saline-alkali soil remediation agent aiming at the problem of insufficient long-acting stability caused by uncontrollable Ca < 2 + > release of an existing saline-alkali soil remediation agent. The method comprises the following steps: by taking alfalfa residues as raw materials, fermenting to generate acidic fermentation liquor, dissolving soil carbonate, reducing pH, triggering coordinate bond dissociation of chelated calcium gel, realizing pH responsiveness of releasing Ca < 2 + >, and releasing Ca < 2 + > to replace Na < + >; meanwhile, quinonyl on the surface of the modified biochar is used for activating extracellular electron transfer of the Prussella adamsii, and hydroxyl ion secretion is promoted to neutralize salt groups; the alfalfa humification fermentation material and exopolysaccharides secreted by flora are crosslinked through hydrogen bonds to form a cementation layer, soil aggregates are stabilized through a modified charcoal pore framework, calcium slow release balance is regulated and controlled, the problem of local hardening caused by sudden release of Ca < 2 + > is cooperatively solved, and long-acting repair and improvement of the saline-alkali soil are achieved.

The invention discloses a preparation process of a nano calcium nutrient, and relates to the technical field of nutrients. The preparation process comprises the following steps: S1, filling two cationic resin columns which are marked as a column 1 and a column 2, respectively soaking the column 1 and the column 2 in a saturated calcium chloride solution, washing the column 1 and the column 2 with the saturated calcium chloride solution until the pH value is 5-6, and washing the column 1 and the column 2 with purified water until the column 1 and the column 2 are neutral for later use; s2, adding a self-made milk hydrolyzed mixed amino acid sodium salt aqueous solution into the cationic resin column 1 prepared in the step S1 at normal temperature, slowly eluting and exchanging, and circularly exchanging the effluent for 3-5 times to obtain an effluent 1; s3, enabling the effluent 1 obtained in the step S2 to pass through a cationic resin column 2, and slowly eluting and exchanging to obtain effluent 2; and S4, carrying out vacuum decompression concentration on the effluent 2 obtained in the step S3, spraying the concentrated solution, feeding into a high-speed airflow chamber, further cutting the atomized solution by high-speed airflow, feeding into a freezing chamber, and freeze-drying to obtain the product. The nano mixed amino acid chelated calcium provided by the invention is small in toxic and side effects and good in safety.

The invention discloses an easily absorbable organic calcium powder containing mineral elements and a preparation process thereof, and the raw materials comprise, by weight, 50-70 parts of an organic calcium source, 20-30 parts of a plant protein source, 5-10 parts of a polybasic amino acid chelate, 0.01-0.03 part of vitamin D3, 1-3 parts of trace mineral elements, 0.5-1.5 parts of compound protease, 0.1-0.3 part of a food-grade surfactant, and 100-150 parts of deionized water. The invention relates to the technical field of nutritional supplements. According to the mineral element-containing easy-to-absorb organic calcium powder and the preparation process, vegetable protein is converted into amino acid through biological enzymolysis, the amino acid and calcium carbonate are subjected to a chelation reaction to generate amino acid chelated calcium, and compared with traditional organic calcium, chelated calcium is more easily absorbed by human intestinal tracts; meanwhile, calcium, magnesium and phosphorus are synergistically matched, magnesium can activate vitamin D3, the vitamin D3 further promotes absorption of calcium, phosphorus and calcium form a reasonable proportion, deposition of calcium in bones is enhanced, and calcium ions can be absorbed in intestinal tracts without depending on gastric acid by adopting a bicyclic stable chelating structure.

The invention relates to the field of nutritional health food, and discloses a casein modified active peptide for promoting bone repair and a preparation method thereof.The structure of the active peptide sequentially comprises a bone targeting sequence with high affinity to hydroxyapatite, a casein phosphopeptide core sequence capable of chelating calcium ions, a casein phosphopeptide core sequence capable of chelating calcium ions, a casein phosphopeptide core sequence capable of chelating calcium ions, a casein phosphopeptide core sequence capable of chelating calcium ions and a casein phosphopeptide core sequence capable of chelating calcium ions from the C-terminal to the N-terminal. The digestion sequence can be specifically hydrolyzed by matrix metalloproteinase, and the alkynyl functional group is used for covalent cross-linking. The active peptide can be mixed with an azido-containing multi-arm cross-linking agent, and hydrogel can be rapidly formed under physiological conditions through cycloaddition reaction. The system can be gelated in situ and anchored to a bone defect part in a targeted manner, and is triggered by a specific enzyme in a pathological microenvironment to controllably release active peptide fragments capable of chelating calcium ions, so that the concentration of local mineral ions is adjusted, the cell living environment is improved, and an effective new way is provided for promoting bone repair.

The invention discloses a method for mineralizing, reinforcing and protecting weathered sandstone cultural relics through carbon sequestration bacteria, and belongs to the technical field of cultural relic protection and restoration. In order to solve the problems of residue of deliquescent anionic salt and generation of bad byproduct ammonia gas in the existing technology for reinforcing and protecting sandstone cultural relics by microbial mineralization, the reinforcing depth and strength are improved in a lower-carbon and higher-efficiency manner, and an aspartic acid chelated calcium liquid containing low-solubility active magnesium oxide is effectively permeated into weathered sandstone; the carbon capture and nucleation effects of the bacillus mucilaginosus with the carbon sequestration function are utilized, on one hand, carbon dioxide in air is captured and converted into carbonate needed by mineralization, on the other hand, carbonate in an ammonium carbonate solution which is easy to volatilize and decompose is locked and used for carbonate mineral crystallization, and meanwhile ammonium ions are inhibited from being converted into ammonia gas to overflow; calcium carbonate and basic magnesium carbonate are induced to be subjected to intercrystallization nucleation, and a high-strength cementation structure is formed in pores of the weathered sandstone and is used for permeating, reinforcing and protecting the weathered sandstone cultural relics.

The present application relates to the field of microorganisms, and specifically discloses a Bacillus megaterium HP‑3 and an application thereof; a Bacillus megaterium HP‑3, Bacillus megaterium HP‑3 (Bacillus megaterium HP‑3) is deposited in the China Center for Type Culture Collection, with a deposit number of CCTCCNO.M20221791; application: a biological fertilizer, comprising the following raw materials in parts by weight: potassium phosphate, diammonium phosphate, EDTA chelated calcium, EDTA chelated iron, magnesium sulfate, zinc sulfate, humic acid, plant fiber, porous particles, and Bacillus megaterium HP‑3 bacterial liquid; Bacillus megaterium HP‑3 has the advantages of strong environmental tolerance, high temperature resistance, and ultraviolet resistance, and the prepared biological fertilizer can inhibit diseases and promote the growth of crops and vegetables.

The invention discloses a method for preparing a water-soluble lignin chelated calcium fertilizer from concentrated black liquor, and belongs to the technical field of chelated fertilizer preparation. The technical key point of the invention is that the novel environment-friendly calcium fertilizer is prepared through CO2 acid precipitation and calcium chloride chelation based on the hydrophilicity and chelation of small molecule lignin in the black liquor. The method mainly comprises the following steps: concentrating the black liquor until the solid content is 30-50%, introducing CO2 gas under a certain condition to carry out an acidification reaction, carrying out centrifugal separation to obtain a precipitate, adding a calcium chloride solid into a supernatant while stirring until no precipitate is separated out, carrying out centrifugal separation to obtain a precipitate, adding absolute ethyl alcohol into the supernatant according to a volume ratio of 1: 1, uniformly mixing, and centrifuging to obtain a precipitate; and washing the precipitate part with a 50% ethanol solution, and drying to obtain the water-soluble lignin calcium fertilizer. The invention provides a preparation technology of the water-soluble lignin chelated calcium fertilizer, which has the advantages of simple and efficient preparation process, low cost and great industrial potential, and opens up a convenient and effective new conversion path for converting the natural polymer material lignin into the efficient fertilizer.

This utility model discloses a waste liquid recovery device for amino acid chelated calcium production, relating to the technical field of waste liquid recovery devices. To address the problem that existing technologies often use filter cartridges to separate wastewater from waste materials in amino acid chelated calcium production waste liquid containing a large amount of powdery impurities, the filter cartridges require timely replacement after prolonged use, which is complex and interrupts filtration, affecting production efficiency. The multi-layer filtration mechanism includes a first filter cartridge, a second filter cartridge, and a third filter cartridge distributed in a specific manner. A first inlet pipe is fixedly connected to the input end of the first filter cartridge, a second inlet pipe is fixedly connected to the input end of the second filter cartridge, and a third inlet pipe is fixedly connected to the input end of the third filter cartridge. The recovery tank includes a tank body and a hopper. A drain pipe is fixedly installed on one side of the tank body, and a water pump is connected between the drain pipe and the first inlet pipe. A particle size sensor is installed on the tank body near the hopper.

The present application relates to the field of microorganisms, and specifically discloses a Bacillus spporidia HP‑2 and an application thereof; a Bacillus spporidia HP‑2, which is deposited in the China Center for Type Culture Collection with a deposit number of CCTCCNO.M20221789; a biological fertilizer comprising the following raw materials: soybean meal, potassium phosphate, diammonium phosphate, EDTA chelated magnesium, EDTA chelated calcium, EDTA chelated iron, zinc sulfate, humic acid, biological fiber, breathable filler, and Bacillus spporidia HP‑2 bacterial liquid; the Bacillus spporidia HP‑2 bacterial liquid is prepared from Bacillus spporidia HP‑2; Bacillus spporidia HP‑2 has the advantages of high temperature resistance and alkali resistance, and can increase crop yield after application.

The invention discloses a preparation method of a high-absorptivity calcium supplement of vitamin D3 (VD3) and casein phosphopeptide chelated calcium (CPP-Ca), which comprises the following steps: firstly, dissolving casein phosphopeptide (CPP) in ultrapure water, adding calcium chloride, adjusting the pH value, stirring and reacting at a certain temperature to generate CPP-Ca, then precipitating by using ethanol, washing for multiple times to remove free calcium ions, and drying to obtain the high-absorptivity calcium supplement of vitamin D3 (VD3) and casein phosphopeptide chelated calcium (CPP-Ca). Centrifuging, collecting the precipitate, and freeze-drying to obtain purified CPP-Ca; the preparation method comprises the following steps: preparing CPP-Ca into a solution, adjusting the pH value, dropwise adding VD3 dissolved in ethanol into the solution, stirring and mixing at room temperature under a certain concentration to finally form the VD3 and CPP-Ca compound, and the compound prepared by the method can significantly promote calcium absorption and effectively improve the stability of VD3 and CPP.

The invention discloses a citric acid-assisted carbonized steel slag-based cementing material as well as a preparation method and application thereof, the preparation method comprises the following steps: mixing and stirring converter steel slag powder and 0.05-0.10 mol / L of citric acid solution, and dissolving out through chelated calcium and magnesium ions; then high-concentration CO2 is introduced for wet carbonization, so that ions are converted into calcium carbonate; carrying out solid-liquid separation, ethanol replacement and drying to obtain a cementing material; according to the method, the carbonization process is regulated and controlled through citric acid, mixed crystal calcium carbonate with calcite as a main component and vaterite as an accompanying component is generated, and the carbonization efficiency and the product activity are remarkably improved. The obtained material has a more compact microstructure, and the accumulated pore volume is reduced by more than 40% compared with the original steel slag; when 30% by mass of the cement is replaced to prepare mortar, the compressive strength of the mortar in 3 days and 28 days is not lower than 31.0 MPa and 45.0 MPa respectively, which are obviously superior to those of the traditional treated steel slag. The method disclosed by the invention is simple in process, green and economical, and provides an effective path for realizing high value-added utilization of the steel slag and carbon neutralization targets.

The invention provides a purification method of high-calcium-magnesium ferrous sulfate and a ferrous sulfate product, and the purification method of the high-calcium-magnesium ferrous sulfate comprises the following steps: S1, preparing the high-calcium-magnesium ferrous sulfate into a supersaturated high-calcium-magnesium ferrous sulfate solution; s2, adjusting the pH value of the supersaturated high-calcium-magnesium ferrous sulfate solution to 1.5-2.5 to obtain an acidified supersaturated high-calcium-magnesium ferrous sulfate solution; and S3, adding a scale inhibitor into the acidified supersaturated high-calcium-magnesium ferrous sulfate solution, sequentially carrying out cooling crystallization and centrifugal separation, and collecting crystals to obtain ferrous sulfate. According to the method disclosed by the invention, the high-calcium-magnesium ferrous sulfate is subjected to impurity removal by adopting a scale inhibitor chelated calcium and magnesium and a recrystallization method, the obtained ferrous sulfate crystal is high in purity, more than 90% of calcium and magnesium can be removed, and the ferrous sulfate can be directly used for synthesizing battery-grade iron phosphate after being dissolved.

The invention discloses a milk-based solid beverage and a preparation method thereof, and relates to the technical field of solid beverages. The invention discloses a preparation method of a milk-based solid beverage, which comprises the following steps: blending raw materials according to a formula ratio to obtain the milk-based solid beverage, the milk-based solid beverage contains 1-7wt% of a calcium supplement; the calcium supplement is obtained by carrying out covalent cross-linking on carboxymethylated beta-glucan and sodium alginate and then carrying out calcium chelation treatment; plant polysaccharide oat beta-glucan is used as a raw material, the oat beta-glucan is subjected to carboxymethylation treatment and then is covalently cross-linked with carboxymethyl sodium alginate to construct a three-dimensional network, the high efficiency and stability of the product are ensured, finally calcium ions are chelated, and the calcium supplement of the solid beverage is prepared. The prepared calcium supplement is high in calcium content and easy to absorb by intestines and stomach.

The invention provides a preparation method of a scaffold for promoting collagenous fiber assembly and internal and external mineralization. The preparation method comprises the following steps: A) adding glycine and potassium chloride into a compound solution formed by chelating non-collagen analogues with calcium ions to prepare an assembly solution; wherein the non-collagen analogue is one or two of polycarboxylic acid substances and glucuronic acid; b) adding a collagen solution into the assembly solution obtained in the step A) to obtain a mixed solution, and adjusting the pH value of the mixed solution to 7.0 + / -0.2; placing the mixed solution in an incubator at 37 + / -0.5 DEG C, incubating for 12-24 hours, and assembling collagen to obtain collagen fibers; c) placing the collagenous fibers prepared in the step B) in a collagenous fiber mineralizing solution for mineralization to obtain mineralized collagenous fibers, and washing, freezing and drying the mineralized collagenous fibers to obtain a mineralized collagenous fiber scaffold; according to the invention, the bone tissue generation process is simulated in a safer bionic manner, so that the collagenous fiber scaffold is assembled and mineralized more efficiently.

The invention relates to the technical field of soil improvement, and discloses a bagasse ash modification-based efficient acid soil conditioner and a preparation method thereof, and the soil conditioner comprises the following components by mass: 45-55 parts of modified bagasse ash; 15 to 20 parts of modified attapulgite; 5-8 parts of amino acid type chelated calcium; 10 to 5 parts of chitosan-polyphosphoric acid composite gel; 5 to 10 parts of water-soluble sodium silicate; the modified bagasse ash is obtained by mixing bagasse ash with a 1-2 mol / L sodium hydroxide solution according to a liquid-solid ratio of 10: 1-20: 1, soaking for 2-4 hours, washing with water until the pH value is close to neutral, and carrying out carbon heat treatment at 650-750 DEG C for 30-60 minutes. The attapulgite and other natural mineral materials are compounded and modified, so that the soil fertility, the air permeability and the moisture retention capability are remarkably improved, and the soil particle dispersity is enhanced.

The invention discloses high-temperature-resistant hydrolysis-resistant high-performance polyatomic acid as well as a preparation method and application thereof, and belongs to the technical field of chemical oil displacement, the high-temperature-resistant hydrolysis-resistant high-performance polyatomic acid is applied to an oil-displacing agent, can remarkably reduce adsorption loss of the oil-displacing agent and a rock surface, has the capability of chelating calcium and magnesium ions, prevents precipitation reaction from the source, and avoids blockage of fracture-cavity channels and micro-pore channels; a zinc metal framework structure in the prepared high-temperature-resistant hydrolysis-resistant high-performance polyatomic acid has chelating sites, calcium and magnesium ions can be locked in advance and prevented from being combined with hydrophilic groups of a surfactant, it is ensured that the micelle structure is stable, foamability and foam stability are not affected, precipitation reaction is stopped from the source, and the high-temperature-resistant hydrolysis-resistant high-performance polyatomic acid is prepared. Fracture-cavity channels and micro-pore channels are prevented from being blocked; and the negatively-charged sulfonic acid group can form doping on the zinc metal framework, so that the chelating capability on calcium and magnesium ions is improved.

The invention discloses a preparation technology of Taihe black-bone chicken melanin chelated calcium, and relates to the technical field of chelated calcium, and the preparation technology comprises the following steps: S1, dissolving Taihe black-bone chicken melanin in a NaOH solution to obtain a melanin solution; and S2, mixing the melanin solution with a CaCl2 solution, adjusting the pH value of the reaction solution to 9.45-9.55 by using a NaOH solution, carrying out an incubation reaction on the reaction solution, centrifuging after the reaction is finished, taking the precipitate, washing, and drying to obtain the Taihe black-bone chicken melanin chelated calcium. The stable melanin chelated calcium is successfully prepared from the black-bone chicken melanin, the preparation process for preparing the black-bone chicken melanin chelated calcium is obtained, and the process conditions are optimized, so that technical reference is provided for development of Taihe black-bone chicken products, and the additional value of the Taihe black-bone chicken products is further increased.

The present application relates to an organic selenium nutrient solution for crops and a preparation method thereof. The nutrient solution comprises, by mass percentage, selenomethionine 0.1-0.5%, complex amino acids 2.0-5.0%, potassium humate 1.0-3.0%, plant extracts 0.5-1.0%, EDTA chelated calcium, magnesium and zinc 0.05-0.5%, potassium sorbate 0.05-0.2%, and purified water as the remainder. Preferably, the selenomethionine is L-type selenomethionine with a three-layer coating, the inner layer of which is formed by cross-linking chitosan and citric acid, the middle layer is hydroxypropyl methyl cellulose, and the outer layer is a sodium alginate-gelatin matrix cross-linked by Ca 2+ / Zn 2+ complex ions. The preparation method comprises adding and chelating each component under specific pH conditions, and stabilizing to form a stable multi-component synergistic system. The nutrient solution has the advantages of high bioavailability, good controlled release performance, high plant absorption efficiency, and strong component stability.

The invention relates to a preparation method of a narrow gadus bone peptide compound and chelated calcium of the narrow gadus bone peptide compound. The method comprises the following steps: by taking a walleye cod processing byproduct fish bone as a raw material, carrying out trypsin preliminary enzymolysis, ultrafiltration and protease K targeted enzymolysis to obtain the walleye cod bone peptide compound. The narrow gadus bone peptide compound comprises one or more active peptides of DFF, DIF, DNAF, DPF and DYF. Chelated calcium can be prepared by using the narrow gadus bone peptide compound or the narrow gadus bone active peptide. Waste resources are fully utilized, high value of low-value products is achieved, environmental pollution is reduced, high economic and social benefits are achieved, and the prepared chelated calcium with the high additional value can be applied to the fields of dietary nutrition, biological medicine products and the like.

The invention discloses a polyphenol-calcium phosphate-hyaluronic acid multifunctional probiotic delivery carrier with an adjustable structure and a preparation method of the polyphenol-calcium phosphate-hyaluronic acid multifunctional probiotic delivery carrier. The carrier is constructed by regulating calcium phosphate mineralization through polyphenol to form a flower-like structure and then adsorbing hyaluronic acid. The preparation method comprises the following steps: (1) preparing nanoflowers from polyphenol chelated calcium phosphate; (2) in-situ packaging of probiotics by the nanoflowers; and (3) coating the probiotic carrier with hyaluronic acid. The preparation method is simple in process and mild in condition, the prepared probiotic packaging body is excellent in biocompatibility, not only can improve gastrointestinal fluid environment tolerance, but also has the capabilities of active oxygen removal, inflammation targeting and intestinal colonization, and by synergistically reducing colitis, relieving tissue damage, repairing intestinal mucosal barrier and restoring intestinal flora balance, the intestinal tract intestinal colonization effect is improved. A new strategy is provided for the treatment of the inflammatory bowel disease.