27results about How to "Process parameters are clear" patented technology

The application discloses an anti-oxidation fermented Chinese herbal medicine mixed substitute tea and a preparation method thereof, and relates to the technical field of substitute tea processing and preparation. The anti-oxidation fermented Chinese herbal medicine mixed substitute tea comprises Sanghuang, Huangqi, Huangjing, Renshen and Gouqi, and the weight ratio of the raw materials is as follows: Sanghuang:Huangqi:Huangjing:Renshen:Gouqi = 4:2:2:1:1. The preparation method comprises the following steps: crushing, fermentation, drying, sterilization, sub-packaging, vacuum sealing, outer packaging, sampling quality inspection and storage in a warehouse. The anti-oxidation fermented Chinese herbal medicine mixed substitute tea is prepared by using a specific formula and biological fermentation of Inonotus hispidus, and the dissolution rate of anti-oxidation active ingredients of Chinese herbal medicines is significantly improved, and the anti-oxidation capacity is far superior to that of conventional physical mixed substitute tea. The fermentation process can efficiently degrade the cell walls of Chinese herbal medicines, so that the polysaccharides and other core anti-oxidation substances in Sanghuang, Huangqi, Huangjing, Renshen and Gouqi are fully released, DPPH, hydroxyl and other free radicals can be directly removed, and the Keap1-Nrf2-ARE signal path in the body can be activated, so that the anti-oxidation defense system of the body is doubly strengthened, and the anti-oxidation effect is improved from the root.

The invention discloses a method for eliminating internal stress of a large-scale polycrystalline diamond block material. The method comprises the following steps that the block material is placed in a vacuum heat treatment furnace; carrying out vacuumizing and gas washing operation on the furnace chamber so as to remove residual active gas; introducing high-purity protective gas into the furnace and maintaining positive pressure; executing a stepped heating and heat preservation process: firstly, heating to a first heat preservation temperature T1 at a first heating rate and preserving heat, and then heating to a higher second heat preservation temperature T2 at a second heating rate and preserving heat; and after heat preservation is completed, the controlled cooling process is executed till the furnace temperature is reduced to the room temperature. A strategy of'stepped heating + long-time heat preservation 'is adopted, firstly, the stress of a part of a high-energy area is preliminarily relaxed at a low temperature T1, and cracking caused by stress concentration due to rapid heating is avoided; then, at a higher temperature T2, sufficient energy is provided for atomic diffusion and grain boundary slippage, and deep and uniform release of the internal stress is achieved. And the method is particularly suitable for large-scale blocks.

The invention discloses an oil-resistant cold-resistant flame-retardant polyvinyl chloride material and a preparation method thereof. The polyvinyl chloride material is prepared from the following raw materials in parts by weight: 100 parts of PVC resin, 40-60 parts of a plasticizer, 30-50 parts of a flame retardant, 15-25 parts of a cold-resistant agent, 10-20 parts of an oil-resistant agent, 5-10 parts of a heat stabilizer and 2-5 parts of a lubricant. Wherein the flame retardant is a composite flame retardant composed of aluminum hydroxide, magnesium hydroxide and antimony trioxide, the cold-resistant agent is an ethylene terpolymer, and the oil-resistant agent is a polar copolymer of acrylonitrile and butadiene. The material is excellent in comprehensive performance, the low-temperature impact performance can pass minus 40 DEG C, after an oil resistance test, the mechanical property loss is extremely small, the oxygen index is maintained to be about 30%, the stable mechanical property and thermal stability are achieved, collaborative optimization of oil resistance, cold resistance and flame retardance is achieved, and the service life of the material is prolonged. The cable is suitable for cable preparation under complex working conditions such as automobile engine cabins, industrial equipment in extremely cold areas and petrochemical engineering, the preparation process is high in controllability, and industrial production is easy.

The present application discloses a kind of hibiscus compound extract, its preparation method and application.The composite extract includes hibiscus exosome, hibiscus traditional active ingredient, snowbank flower extract and microalgae extracellular polysaccharide, wherein the hibiscus exosome and hibiscus traditional active ingredient are simultaneously extracted from hibiscus raw materials by integrated extraction process.The preparation method includes raw material pretreatment, integrated extraction, separation and purification, synergistic compounding and post-processing, and two types of active substances are efficiently and synchronously obtained by optimizing solvent, temperature, time and purification parameters.The composite extract exhibits excellent anti-aging, anti-inflammatory and moisturizing effects in cosmetics, and has excellent effects of regulating intestinal flora and enhancing immunity in functional foods.The process produces significant synergistic effect by combining specific synergistic components, and the effect is much better than single component or simple mixture, realizing the maximization of plant resources and the synergistic promotion of efficacy.

The invention discloses a traditional Chinese medicine composition for treating diabetic skin itch and a preparation method thereof, and belongs to the technical field of traditional Chinese medicines. The composition is prepared from angelica sinensis, astragalus membranaceus, radix paeoniae rubra, cortex dictamni, rehmannia, ligusticum wallichii, scalded peach kernels, safflower carthamus, fried tribulus terrestris, divaricate saposhnikovia roots and cicada slough according to a specific weight ratio. On the basis of a classic famous formula of the Chinese angelica potion, the Chinese angelica potion is innovatively prepared aiming at the core pathogenesis of qi deficiency, blood stasis, damp-heat and wind-dryness of diabetic skin itch. The radix paeoniae rubra and the radix paeoniae alba are used for enhancing the effects of cooling blood and dissipating blood stasis; peach kernel and safflower are added to strengthen blood circulation activation and collateral dredging; cortex dictamni is added to enhance dampness eliminating and detoxification; cicada slough and herba schizonepetae are used for enhancing wind dispelling and heat clearing, and the nature is Polygonum multiflorum and liquorice are removed, so that the safety is improved. The whole formula has the effects of tonifying qi, promoting blood circulation, eliminating dampness, detoxifying, dispelling wind and moistening dryness. The invention also provides a preparation method of the composition. The composition can be used for preparing medicines for treating skin diseases such as diabetic skin itch and eczema, and is remarkable in curative effect and high in safety.

The application discloses a short-process low-cost Ti-55531 high-strength titanium alloy rod forging method and belongs to the technical field of titanium alloy material processing. The method comprises the following steps: material preparation, first high-temperature forging, second high-temperature forging, surface treatment, low-temperature upsetting and drawing and redrawing, continuous hexagonal drawing and rolling forming. The forging and rolling are regarded as necessary processes after each drawing by optimizing heating process parameters and deformation time sequence, combined with the cooperative process of reversing upsetting and drawing and rapid water quenching, the organization evolution is accurately controlled, the efficiency and uniformity are improved by adopting the multi-fire continuous deformation mode, and finally the processing loss is reduced by precise forming, so that the efficient and economic preparation of high-performance rods is realized.

The present application belongs to the technical field of medical hemostatic dressings and bandages, and particularly relates to a Duyuwei emergency hemostatic bandage, which comprises a bandage main body, the bandage main body is composed of a tight band and a dressing pad, the dressing pad is fixed to the front end of the tight band, the dressing pad is composed of an absorption area, a tablet area and a pad base layer, the absorption area and the tablet area are fixed on the pad base layer by traditional Chinese medicine glue, the absorption area is composed of Duyuwei gelatin sponge, the tablet area is composed of Duyuwei external-use tablets, and the pad base layer is composed of a medical degreasing cotton pad. A preparation method of the Duyuwei emergency hemostatic bandage comprises the following steps: Duyuwei medicinal material decoction piece component extraction, Duyuwei external-use tablet preparation, traditional Chinese medicine glue preparation, Duyuwei gelatin sponge preparation and Duyuwei hemostatic bandage preparation. The present application has the advantages of rapid hemostasis and remarkable efficacy: the Duyuwei extract, the gelatin sponge and the traditional Chinese medicine glue synergistically act to significantly shorten the hemostasis time. Animal experiments show that the average hemostasis time is short.

The invention discloses moisturizing and anti-aging soft mask powder and a preparation and use method thereof, sodium alginate, calcium sulfate and hydroxypropyl methyl cellulose synergistically construct a stable film-forming system, and the stable film-forming system is compounded with an opuntia ficus-indica fruit extract, low-molecular sodium hyaluronate and panthenol to form a long-acting moisturizing network; meanwhile, multiple anti-aging active matters such as oligopeptide and roselle flower extract are integrated. The soft mask powder has the characteristics of rapid and smooth film formation, excellent moisturizing performance and remarkable anti-oxidation and anti-aging effects, does not contain preservatives, artificial pigments and spices, is safe and mild, and is suitable for professional nursing and daily anti-aging and moisturizing.

The application provides a kind of weather-resistant optical functional coating nanoparticles and its preparation method and application, belong to the field of coating.The nanoparticles include: inner core, the inner core is near-infrared reflective material;The near-infrared reflective material uses metal oxide nanoparticles with near-infrared reflective function;First wrapping layer, the first wrapping layer is silica intermediate layer, which wraps the inner core;Second wrapping layer, the second wrapping layer is alumina passivation layer, which wraps the silica intermediate layer.The nanoparticles are used as the functional filler of weather-resistant optical functional coating.The application provides a kind of core-shell structure nanoparticles, by introducing specific passivation layer, while retaining the near-infrared reflective function of inner core material, fundamentally eliminate its photo-catalytic damage to organic matrix, so as to obtain long-acting stability, high visible light transmittance, excellent spectral selectivity and weather-resistant coating.

The invention discloses a high-temperature-resistant honeycomb composite protection plate for an armored car shell and a preparation method of the high-temperature-resistant honeycomb composite protection plate, relates to the technical field of armor protection, and solves the technical problems that the bulletproof performance and the metal jet flow prevention performance of an existing armor plate are difficult to consider, the high-temperature-resistant stability is insufficient, and the adaptability of a preparation process is poor. The protection plate is composed of a surface layer (1) made of a high-strength alloy steel plate, an inner layer (2), an antinode rib plate array (3) and a high-temperature-resistant functional mortar filling layer (4), a honeycomb supporting structure is formed through array type welding, and customized high-temperature-resistant functional mortar is filled in a cavity; the preparation method comprises the steps of pretreatment, honeycomb skeleton forming, mortar customization preparation, pouring filling, curing, accurate performance detection and the like. Through collaborative innovation of structure-material-process, comprehensive optimization of bulletproof, metal jet prevention, high temperature resistance and light weight is realized. The device is suitable for protecting shells of armored cars and amphibious armored cars, and the safety survivability of equipment is remarkably improved.

This invention discloses a method for preparing high-density, low-defect yttrium oxide ceramic materials and their applications, comprising the following steps: (1) preparing ceramic blanks by using high-purity yttrium oxide precursor powder through a molding process; (2) heating the ceramic blanks obtained in step (1) to 800-900 ℃ at 1-5 ℃ / min in an oxidizing atmosphere and holding them for 15-30 h; (3) continuing to heat the material obtained in step (2) to 1080-1150 ℃ at 1-5 ℃ / min in an oxidizing atmosphere and holding them for a shorter holding time than in step (2); (4) cooling the material obtained in step (3) with the furnace to avoid thermal stress-induced cracks, thereby obtaining the high-density, low-defect yttrium oxide ceramic material. This invention improves the density and microstructure uniformity of the material, enhances surface chemical stability and defect repair, strengthens bulk crystallinity and thermal shock resistance, reduces the risk of particulate contamination and extends component life, and the process is energy-saving, environmentally friendly and highly operable.

The invention provides a nano preparation for preparing a medicine for inhibiting prostatic cancer and a preparation method of the nano preparation, and relates to the technical field of nano medicinal preparations. The nano preparation comprises the following components in parts by mass: traditional Chinese medicine components and a nano carrier, the traditional Chinese medicine component comprises 15-45 parts of a Chinese yam extract, 5-15 parts of a madder extract, 8-20 parts of cuttlebone superfine powder, 10-25 parts of dragon bone superfine powder and 10-25 parts of oyster superfine powder; the nano-carrier comprises 5-20 parts of phospholipid, 2-10 parts of cholesterol, 1-5 parts of fatty acid, 3-15 parts of polyethylene glycol and 1-5 parts of a surfactant. The average particle size of the nano preparation is 80-150 nm, the polydispersity index PDI is smaller than or equal to 0.30, and the encapsulation efficiency is larger than or equal to 75%. According to the invention, active ingredients of traditional Chinese medicines are combined with a nanotechnology, so that the bioavailability and the tumor targeting property are remarkably improved, the pH-responsive release characteristic is achieved, a remarkable inhibition effect on various prostate cancer cell lines is shown, tumor growth can be effectively inhibited, metastasis can be reduced, and a good application prospect is achieved.

The invention provides a preparation method and application of a solid bonding lubricating protective coating for a high-end fastener, and belongs to the technical field of high-temperature protective coatings. The solid adhesive lubricating protective coating comprises the following raw materials in parts by mass: 5-15 parts of a ceramic precursor adhesive; 4-14 parts of a filler; the filler comprises a low-temperature section filler and a high-temperature section filler; 30-60 parts of a dispersion medium; and 0.1-1 part of an auxiliary agent. From a formula design source, namely aiming at core challenges of vibration relaxation, fretting wear, wide-temperature-range service and the like faced by high-end fasteners, the prepared coating is specially used for the fasteners, and the obtained coating realizes unification of strong adhesion, wide-temperature-range effective lubrication and excellent wear resistance and fretting resistance under the synergistic effect of a ceramic precursor adhesive and a filler. The locking torque of the solid bonding lubricating protective coating is 7.9-15 in.lb, and a cracking or falling phenomenon does not occur in a high and low temperature alternating cycle test.

The invention discloses a controllable thermal expansion preparation method of a graphene oxide layer. The controllable thermal expansion preparation method comprises the following steps: S1, preparing a modified graphene oxide precursor; s2, preparing a graphene oxide layer preform; s3, gradient heating controllable thermal expansion treatment is carried out; s4, post-treatment shaping is carried out; graphene oxide is modified through an amino silane coupling agent, amino functional groups are introduced, the interlayer acting force of graphene oxide is regulated and controlled, a precursor foundation is provided for subsequent controllable thermal expansion, and the problem that thermal expansion is uncontrollable due to the fact that the interlayer acting force of a traditional precursor is unstable is effectively solved; a gradient heating thermal expansion process is adopted, the heating rate and the constant temperature time are controlled in three stages, moisture removal, functional group decomposition and deep expansion are carried out in order, local excessive expansion or insufficient expansion caused by a single heating rate is avoided, and it is ensured that the graphene oxide layer expands uniformly and the pore structure is controllable.

The invention relates to the technical field of traditional Chinese medicine, in particular to anti-inflammatory and analgesic external traditional Chinese medicine powder for osteoarthritis and a preparation method thereof, and the powder is prepared from the following raw materials in parts by weight: 6.7 parts of mirabilite, 2 parts of borneol, 1 part of fructus gardeniae, 0.7 part of rhizoma paridis, 0.7 part of radix aconiti, 0.7 part of radix aconiti agrestis, 0.6 part of caulis spatholobi, 1.3 parts of rheum officinale, 0.4 part of cassia twig and 0.6 part of radix achyranthis bidentatae. The preparation method comprises the following steps: weighing the medicinal materials according to the proportion, mixing, grinding at low temperature, controlling the temperature to be below 40 DEG C until uniform and fine powder is formed, and sieving, so as to obtain the traditional Chinese medicine powder. The powder has the effects of clearing away heat and toxic materials, promoting blood circulation to remove blood stasis, relieving swelling and pain, dispelling wind and eliminating dampness, and warming and activating meridians; the traditional Chinese medicine composition has the advantages of quick effect, exact curative effect, convenience in use and high safety on osteoarthritis (especially patients with red, swollen and heat pain symptoms). The preparation method is simple in process, easy to control and suitable for industrial production.

This invention discloses a method for fermenting fresh almond flowers with *Lactobacillus plantarum*, the fermentation products, derivatives, and their applications. The method uses fresh almond flowers as raw material. After pretreatment, pulping, substrate preparation, and sterilization, *Lactobacillus plantarum* is inoculated for anaerobic or microaerobic fermentation. After fermentation, enzymes are inactivated and separated to obtain the fermentation expression product. This fermentation expression product is rich in free amino acids, small peptides, aromatic compounds, organic acid derivatives, and polyphenol derivatives, exhibiting a mild and natural aroma and excellent antioxidant and soothing activities. This invention also provides derivatives obtained from further processing of this fermentation expression product, and their applications in cosmetics, skincare products, natural fragrances, and functional foods. This invention features a mild process, is solvent-free, and highly safe, achieving high-value utilization of fresh almond flowers.

The invention discloses a synthesis process of a thermosensitive color developing agent 3, 3 '-benzenesulfonyloxy diphenyl urea, and belongs to the technical field of organic synthesis. According to the process, m-aminophenol, benzene sulfonyl chloride and triphosgene are used as raw materials, 1, 2-dichloroethane is used as a solvent, triethylamine is used as an acid-binding agent, a one-pot method is adopted to construct a two-step continuous reaction through sulfonylation and urea bonds, then acidification, liquid separation, extraction, spin-drying and methanol crystallization are performed to obtain a target product, and no intermediate needs to be separated in the whole process. According to the invention, parameters such as reaction temperature and feed ratio are optimized, the problems of tedious preparation process and low yield in the prior art are solved, the reaction condition is mild, the operation is convenient, the raw material is a conventional analytically pure reagent, the product yield is 72-76%, the purity is greater than 99.5%, the raw material utilization rate is high, the industrial application prospect is good, and the product can be widely used as a thermosensitive color developing agent.

The present application relates to the technical field of food condiment, in particular to a kind of halal composite seasoning and preparation method thereof.The seasoning includes the following mass parts of raw materials: edible mushroom enzymatic hydrolysate 30-50 parts, yeast extract 5-15 parts, edible salt 10-20 parts, white granulated sugar 5-12 parts, glucose 1-5 parts, sodium glutamate 3-8 parts, disodium inosinate 0.5-2 parts, halal spice powder 8-15 parts, vegetable oil 5-10 parts, resistant dextrin 3-8 parts, malt dextrin 2-6 parts.The preparation method includes: mixing edible mushroom enzymatic hydrolysate, yeast extract, glucose and vegetable oil to carry out Maillard reaction, to obtain reaction base material;mixing reaction base material and the remaining raw materials to carry out homogenization and sterilization to obtain the present application.The present application is through the synergy of edible mushroom enzymatic hydrolysate and yeast extract, Maillard reaction aroma enhancement, specific ratio dextrin flavor protection, so that the seasoning has the characteristics of rich and full umami, good heat resistance, flavor lasting.

This invention relates to the field of food sauce technology, and more particularly to a wasabi and mushroom sauce and its preparation method. The wasabi and mushroom sauce is prepared from the following raw materials in parts by weight: 80-120 parts wasabi granules, 5-20 parts wasabi oil granules, 150-300 parts diced mushrooms, 30-60 parts edible oil, 10-30 parts sweetener, 8-12 parts edible salt, 4-10 parts thickener, and an appropriate amount of water. This invention combines wasabi granules with highly stable wasabi oil granules. The wasabi oil granules are obtained by solidifying a Pickering emulsion stabilized with sodium octenyl succinate starch / microcrystalline cellulose and hydrogenated palm oil, exhibiting excellent protection and sustained-release effects against isothiocyanates, etc. The added diced mushrooms enrich the chewy texture. The wasabi and mushroom sauce maintains a high ITC content after storage, with a long-lasting flavor and rich taste, combining the aroma of real wasabi, the umami of mushrooms, and a full-bodied chewy texture.

The invention discloses a reversed-phase nickel-based catalyst as well as a preparation method and application thereof, and relates to the technical field of catalysts. The preparation method comprises the following steps: mixing nickel nitrate hexahydrate, cerium nitrate hexahydrate, aluminum nitrate nonahydrate, a precipitator and an accelerant, and carrying out hydrothermal reaction to obtain a mixed oxide; and centrifuging, drying and calcining the mixture, and tabletting and granulating the product to obtain the target catalyst. The catalyst is good in catalytic activity and high in selectivity in a CO2 hydrogenation methane preparation reaction, and when the reaction temperature is 140 DEG C, the CO2 conversion rate reaches 75.15%, and the methane selectivity is 100%. Meanwhile, the catalyst is not obviously inactivated during long-term operation, and shows excellent catalytic stability. In addition, the preparation of the reversed-phase nickel-based catalyst is realized by adopting a one-step hydrothermal method, the technological process is simple, the conditions are controllable, large-scale production can be realized, and the method has a good industrial application prospect.

This invention relates to the field of toughening agent technology, specifically a high-transparency, cold-resistant toughening agent for polyester materials and its preparation method. By weight, it comprises 50-90 parts PET, 10-40 parts PETG, 1-10 parts high-transparency TPEE, 1-5 parts TPEE-g-MAH, 0.3-6 parts composite plasticizer, 0.1-0.5 parts nucleating agent, and 0.1-0.5 parts antioxidant. The preparation method includes: raw material drying, additive premixing, mixing the base material and additives, melt extrusion, and cooling pelletizing. This invention, through the synergistic effect of high-transparency TPEE and the specific compatibilizer TPEE-g-MAH, achieves nanoscale dispersion and strong interfacial bonding while solving the technical problem of "toughening inevitably reducing transparency" in traditional toughening materials. This results in a material with a low-temperature impact strength of 110-150 kJ / m² at -30°C, while maintaining a light transmittance ≥90% and a haze ≤2%. It is particularly suitable for PET products requiring high transparency and low-temperature impact resistance.

The invention belongs to the technical field of food processing, and discloses non-fried caramel treats and a preparation method thereof. The raw materials comprise dough, syrup and yolk liquid in a weight ratio of 1: (0.5-0.6): (0.02-0.04); wherein a preparation method of the dough blank comprises the following steps: equally dividing low-gluten flour into two parts, adding a butter-water mixture at 90-100 DEG C into one part for kneading dough, adding whole egg liquid and porous starch into the other part for kneading dough, then uniformly kneading the two parts of dough, and adding glutamine transaminase for enzyme catalysis treatment; a preparation method of the syrup comprises the following steps: adding the maltose, the trehalose and the table salt into water, boiling into slurry, adding the butter and the maltodextrin, and uniformly mixing; the solid content of the egg yolk liquid is 30-40%, and the egg yolk liquid is coated on the surface of the dough blank after the dough blank is baked and before the syrup is coated on the surface of the dough blank. The non-fried caramel treats effectively solve the technical problems that the existing non-fried caramel treats are weak in adhesion with syrup and the finished product is easy to loosen, and meanwhile, the crispy mouth feel and the health attribute of the product are considered.

The application discloses a kind of based on the G50 steel macrostructure hot acid etching detection method of multi-parameter optimization, belongs to metal material detection technical field.The method core is in through multi-parameter coordination accurate control, solve the problem of traditional method acid etching effect instability.Mainly include: using roughness tester quantification control sample surface roughness Ra≤1.6 μm;Hydrochloric acid aqueous solution with volume ratio of 1:1 is heated and constant temperature at 72±1 ℃;The sample is immersed in acid etching agent and accurately temperature 23±2 min;Later stage adopts suede brush in flowing warm water and washes to remove corrosion product completely.The application is through sample surface quality digitization monitoring, acid solution temperature intelligent adjustment, acid etching time accurate control and optimization post-processing process, effectively avoid under etching and over etching phenomenon, significantly improve the definition of G50 steel macrostructure defect display, the accuracy and repeatability of detection result, will detect accuracy rate be improved to 90% or more.The application is suitable for G50 steel raw material admission and forging billet metallurgical quality evaluation.

The invention belongs to the technical field of wastewater treatment, and particularly discloses a paraquat wastewater resourceful treatment method which comprises the following steps: placing pyridine production wastewater under a subcritical condition, taking air as an oxidizing agent, enabling pyridine and derivative organic matters thereof to react on the surface of a noble metal catalyst, and degrading the organic matters into CO2, N2 and water; adsorbing residual pyridine at normal temperature by using special resin; and treating by adopting a biochemical process, and discharging after reaching the standard. Adjusting the pH value of the paraquat production wastewater to be acidic; the method comprises the following steps: placing wastewater under a subcritical condition, degrading nitrogen-containing organic matters into CO2, ammonia and water, and removing most cyanide and paraquat; the ammonium chloride and the sodium chloride are separated by hot circulating evaporation, and the recovered ammonium chloride and the recovered sodium chloride meet the recycling standard. By adopting the paraquat wastewater resourceful treatment method disclosed by the invention, the problems that pyridine compounds are difficult to degrade, the biochemical inhibition property is strong, and salt and pyridine resources cannot be effectively recycled in paraquat wastewater treatment in the prior art are solved.

This invention discloses a method for improving the microstructure and properties of double-wire submerged arc welded joints for bridge steel, belonging to the field of steel structure welding technology. The method includes: employing a double-sided V-groove design; selecting TMW-C2NiKq welding wire with a Ni content of not less than 0.24% and TMW-B121q flux; maintaining the interpass temperature at 90–130℃ by controlling the current-voltage matching and heat input of the double wires within the range of 80–110 kJ / cm; and effectively suppressing the expansion of the coarse-grained zone and the formation of the weld softening zone by combining alternating positive and negative welding sequences. After welding, the width of the coarse-grained zone of the joint is ≤2.6 mm, the microhardness of the softest zone is ≥140 HV10, and the impact absorption energy at –40℃ is ≥120 J. This method requires no additional equipment, is suitable for the efficient manufacturing of welded structures of 30–50 mm thick bridge steel, and has good process stability and promising engineering application prospects.

The invention discloses a method for preparing high-omega-3 enriched walnut oil-based structured lipid by an enzyme method and application of the high-omega-3 enriched walnut oil-based structured lipid. The method provided by the invention comprises the following steps: under the catalytic action of immobilized lipase Novozym 435, walnut oil and linseed oil are subjected to transesterification to obtain walnut oil-based structured lipid, and efficient recovery and reuse of enzyme are realized. The total doping rate of alpha-linolenic acid (ALA) in the prepared structured lipid is larger than or equal to 36%, the enrichment rate of sn-2 site ALA is larger than or equal to 28%, the oxidation induction period (110 DEG C) is larger than or equal to 3.5 h, and the catalytic efficiency of Novozym 435 is still reserved to be larger than or equal to 82% after the Novozym 435 is recycled for 9 times. The product has excellent oxidation stability and crystallization characteristics, can be widely applied to the fields of functional foods, nutritional supplements and the like, is green and efficient in preparation process, and can be used for large-scale production.

The invention discloses a special antibacterial coating with a nano silicon dioxide core-shell structure for medical equipment and a preparation method of the special antibacterial coating. The coating has a particle size of 5 + / -1nm, PD Ilt; the preparation method comprises the following steps of: loading silver nanoparticles of which the particle size is 2-5nm in situ by taking nano silicon of which the particle size is 0.1 as a carrier core, and coating ZnO quantum dots to form an efficient antibacterial inner core; the shell is composed of a PLGA polymer matrix containing grafted heparin, an APTES adhesion enhancer and an auxiliary agent. By optimizing the formula ratio (such as 65% of a nano silicon carrier, 4% of silver, 12% of APTES and the like) and the process (microwave-assisted loading, electrostatic spraying, gradient curing and plasma grafting), collaborative balance of high-performance indexes is realized. The final coating thickness is lt; the adhesive force reaches 5B level, the 24-hour bacteriostasis rate on G < + > / G <-> bacteria and fungi is greater than or equal to 99.95%, and the cell survival rate is gt; and moreover, the silver ions are released gently and lastingly. The invention solves the contradiction among high antibacterial property, low toxicity, strong adhesion and ultrathin design, and is suitable for surface modification of various medical instruments.