911 results about "Low temperature treatment" patented technology

An amorphous hard carbon film has low friction coefficient from the beginning of sliding, when the metal oxide is contained in the film. The adhesion of the film to the substrate is also improved due to the low temperature treatment of RF plasma enhanced CVD method. This film can be applied to many sliding members, e.g., a piston ring, a vane of compressor and a plunger of fuel injection pump, used under severe condition.

The invention discloses a high specific capacity spindle-shaped ferroferric oxide/carbon nano composite material for a negative electrode of a lithium ion battery. A raw material, namely soluble ferric salt is solved in a mixed solvent of glycerol and distilled water; after low-temperature treatment, precipitates are collected, and a spindle-shaped iron oxide hydroxide (FeOOH) precursor is obtained; and after the precursor is subject to carbothermal reduction, the ferroferric oxide/carbon nano composite material with the same appearance is obtained. The invention discloses a preparation method of the spindle-shaped ferroferric oxide/carbon, which has the advantages that the operation is simple, convenient and simple to do, the used raw material has a cheap price, mass production is facilitated, and the synthetized spindle-shaped ferroferric oxide/carbon nano composite material shows high first time coulomb efficiency and high specific capacity when being used as the negative electrode of the lithium ion battery, and is a promising negative electrode material of the lithium ion battery.

A method for extracting bean phytohemagglutinin belongs to the extraction technical field of useful constituents of plants. The method is a water extraction method in which the extraction is performed at 40-60 DEG C based on the following steps: crushing bean seeds to 40-100 meshes, adding soak solution to extract bean husk at the temperature of 40-60 DEG C for 60-180min and then fish the bean husk, performing rough separation to remove bean dregs, centrifugally separating to obtain supernatant with the bean phytohemagglutinin, further performing separation and purification on the supernatant, condensing or drying the supernatant to obtain the phytohemagglutinin. Ultrasonic wave or microwave can be exerted in the whole or part of the extraction process, or the ultrasonic wave and the microwave are alternately exerted to perform auxiliary extraction. A traditional low-temperature soaking and low-temperature treatment method is completely discarded in the method, and practice proves that the method is a simple and efficient method for extracting the phytohemagglutinin in short time. Related detection proves that the obtained phytohemagglutinin can meet conventional experimental needs and medicinal needs. The method helps overcome the disadvantage of more chemical reagent composition residue and long extraction time of the products obtained by the prior art.

The invention relates to a process method for improving the manufacturing accuracy of an aluminum-alloy open-type integral impeller. The method comprises the concrete steps of preparing materials, carrying out rough-turning on impeller blank shape, carrying out rough-turning on a process gripping head, carrying out heat treatment, carrying out artificial aging, carrying out semi-fine-turning on the process gripping head, carrying out semi-fine-turning on impeller shape, carrying out low-temperature treatment, carrying out five-axis-linkage-machining rough-milling, carrying out natural aging, carrying out five-axis-linkage-machining fine-milling, gripping, carrying out fine-turning on an axle hole, carrying out fine-turning on an impeller, gripping and carrying out dynamic balance. The impeller manufactured by adopting the process method provided by the invention has the characteristics that the shape is complete, the curved face is smooth and unhindered, blade curved faces and flow passage curved faces are low in deformation, and shown by the results of a fluorescent flaw detection, blade surfaces and front edges of the blades are flawless; during the dynamic balance of the integral impeller, mass reduction is relatively low, the qualified rate is high, and the qualified rate of excess-revolution tests of the integral impeller is greatly increased; the improvement of process for the series of integral impeller parts is realized, and good product quality, performance and design requirements are guaranteed; meanwhile, the stability of production quality is improved, and the reliability of products is improved.

The invention belongs to the technical field of preparation of semiconductor thin films, and particularly relates to a low-temperature treatment method for producing an indium gallium zinc oxide (IGZO) semiconductor thin film by using a sol-gel method. The method comprises the following steps of: dissolving In(NO3)3.4*5H2O, Ga(NO3)3.4*5H2O and Zn(C2H3O2)2*5H2O into ethylene glycol monomethyl ether serving as a solvent and monoethanolamine serving as a stabilization agent to form a clear stable precursor solution; and coating the precursor solution on a glass substrate in a rotatable manner, and irradiating by using an infrared heating lamp to obtain the flat and transparent IGZO semiconductor thin film. Compared with the conventional method for preparing the IGZO thin film through annealing of a heat plate by using the sol-gel method, the method has the advantages that the IGZO thin film irradiated by the infrared heating lamp is relatively high in semiconductor and optical properties, and the process temperature is relatively low and lower than 250 DEG C; the IGZO thin film is used as a thin film transistor with a trench layer material; the switch current ratio is more than 5*10<6>; the saturated migration rate is more than 1.8 cm<2>/Vs; and the subthreshold amplitude is less than 2.2 V/dec.

A system for producing Erbium Oxide thin films with increased photoluminescence. The system includes a depositing stage for forming Erbium Oxide molecules by reacting Erbium sputtered atoms with O₂ in a gas phase and creating the Erbium Oxide thin film by depositing the Erbium Oxide molecules on a substrate coated with Silicon Oxide. The system further includes an annealing stage for annealing the Erbium Oxide thin films by utilizing a low temperature treatment for a specified amount of time and temperature followed by a high temperature treatment for another specified amount of time and temperature, wherein the crystallinity of the thin films has improved.

The invention discloses a preparation method of an astaxanthin micro nanometer solid steady-state preparation capable of being dispersed through cold water. A natural astaxanthin extract is used as a raw material, through technologies of low-temperature treatment, low-energy self micro emulsification, microencapsulation, drying, granulation and embedding twice and the like, the astaxanthin micro nanometer solid steady-state preparation capable of being dispersed through cold water can be prepared. The prepared astaxanthin solid preparation powder disclosed by the invention is dried, good in flow property, and good in product processing and storing stability; and besides, the bioavailability of astaxanthin is significantly improved. The method is simple in preparation technology, mild in condition, and suitable for industrialized popularization and application. Through the adoption of the technique of the preparation method disclosed by the invention, the astaxanthin can be steadily applied in the field of aqueous-phase medium foods, solid medium foods, various premix food, daily chemical articles for use, medicines and the like, the application field of the astaxanthin is greatly widened, the pluralism of products is greatly widened, and the market potential is tremendous.

The invention relates to a skate liver oil and a preparation method thereof. The skate liver oil is characterized in that the skate liver oil comprises 0.76-1.13mass% of alkoxy glycerin, 0.71-0.92mass% of squalene, 25-28mass% of EPA and DHA, 1200-1600IU/g of vitamin A, 120-150IU/g of vitamin D, and the other substances which are lipids. The preparation method comprises the following steps: freezing skate livers, unfreezing, chopping, carrying out enzymatic hydrolysis treatment, carrying out enzyme killing treatment after the enzymatic hydrolysis, centrifuging, freezing the obtained emulsion, unfreezing, demulsifying, centrifuging, refining, degumming by citric acid, deacidifying by a caustic soda-soda ash mixture (a mass ratio of caustic soda to soda ash is 2:1), carrying out low temperature treatment, and carrying out evacuating nitrogen-filling packaging. The method has the advantages of reasonable operation, low cost and mild conditions, and the obtained skate liver oil has a very low peroxide value, a very low acid value and no nutrition loss, is rich in vitamin A, vitamin D, EPA, DHA, and important squalene and alkoxy glycerin, has a reinforced healthcare effect, and is easy to preserve and circuit in the market because of the evacuating nitrogen-filling packaging.

The invention relates to a cultivation method for an oriental lily fresh cut-flower, which comprises the following steps of: carrying out different stages of rooting and low-temperature forced germination on handpicked refrigerated seed balls, then planting in a transformed ground substance, strictly controlling the illumination, the temperature, the humidity of each growing stage, and evenly applying all kinds of required fertilizers. In the invention, through low-temperature treatment in a refrigeration house before planting, the roots of the lily seed balls grow to a certain extent, the influence of the harmful factors, such as high temperature and the like, on root system growth in the growth process after planning is reduced, thereby ensuring the supply of the nutrient and the moisture for the plant, and the quality of the cut-flower is improved. By using the cultivation method, the oriental lily has the advantages of fine growth and development, high and robust plant, high cut-flower rate, excellent quality, long childbearing period, bright-coloured flower color, bright lamina, thick and rigid petal character, good insertion-resistance, and little appearing leaf burning; the cultivated lily plant has strong disease resistance and aromatic flavor; and the cultivation method has high use ratio of facility space and can shorten the growth cycle of the fresh cut-flower.

The invention relates to a rice anther culture improvement technology, and in particular relates to a method for improving the frequency of callus induction and plant differentiation rate in japonica rice anther culture. The method comprises the following steps that: 200g/667m<2> of 10% of paclobutrazol wettable powder and 50-60L of water are mixed for spraying treatment before sampling, the spraying of the paclobutrazol and low-temperature treatment cause multiple pollen cells in the anther to be in the later monokaryotic stage, novel cytokinin 4-FA is introduced into a callus inducing medium, under the synergistic action of the 4-FA, KT, and 2,4-D, division is easily started in the dark culture after inoculation, and the frequency of callus induction is greatly improved. By using the anther culture method, the frequency of callus induction in the japonica rice anther culture is obviously improved to exceed 85.0%. A differential medium comprises the following ingredients: an MS (Murashige and Skoog) basic culture medium, 0.5mg/L of NAA, 0.5mg/L of ZTO, 0.8mg/L of TDZ, 0.2mg/L of FA, 0.2mg/L of MET, 30g/L of saccharose, and 8g/L of agar powder; and after the novel hormones of ZT, 4-FA and TDZ are introduced, light cultivation is carried out, and plant differentiation rate can reach more than 86%.

The invention discloses a flowering time adjustment and control method for enabling a peony to blossom in winter. The method comprises the steps of variety and plant selection, forced dormancy, root growth promoting and flower forcing treatment, so that a purpose of manually advancing the flowering time of the peony is achieved. The flowering time of the peony is advanced by performing low-temperature treatment on the peony in summer for breaking the dormancy; a purpose of effectively controlling the flowering time is achieved by controlling the temperature and illumination during flower forcing; the treated peony is large and bright-colored; a peony plant is robust; the flowering time is longer; and an ornamental value is high.

The invention discloses a composite preservation method of hairtail slices by partial freezing treatment in combination with a natural preservative, which comprises natural preservative dipping treatment and partial freezing low-temperature treatment. The invention can achieve the effects of inhibiting bacteria and lower the temperature of fish slices. The natural preservative comprises the following components in percentage by weight: 0.02-0.05% of nisin, 0.01-0.06% of epsilon-polylysine, 0.01-0.05% of lysozyme and the balance of water. The partial freezing process for preserving the product ensures the integrity of the product cells, can maintain the original color, freshness and flavor, greatly prolongs the shelf life of the product; and the product is still very fresh after being stored for 25 days.

The invention discloses a new method for inducing a garlic test tube bulb. The method mainly comprises the following steps of: performing low-temperature treatment of the garlic tender bud at 4 DEG C to induce atmogenic bulbil; rejuvenating atmogenic bulbil on an MS+2.5mg KT+0.5mg NAA culture medium; and inducing the test tube bulb on an MS+60g/L sucrose culture medium without hormone. The method can be used for improving the propagation efficiency of garlic rapid propagation by using atmogenic bulbil as seeds, and reducing the cost. By virtue of the method disclosed by the invention, the atmogenic bulbil induction rate can reach 100% (each bud can induce out atmogenic bulbil), each bud can induce out 25 atmogenic bulbils, all of the atmogenic bulbils can be induced into test tube bulbs, and the test tube bulb induction rate reaches 100%. Without cell dedifferentiation and redifferentiation in the whole induction process, the genetic mutation probability is reduced; and the method disclosed by the invention provides important possibility for the industrialized seedling production of garlic rapid propagation.

The invention provides a technology for cultivating super-early-maturing pollution-free strawberries. The technology mainly comprises the steps of seedling cultivation, high-temperature soil treatment, low-temperature strawberry seedling treatment, field planting and management conducted after field planting. The technology for cultivating super-early-maturing pollution-free strawberries has the advantages that, because during cultivation and planting, application of pesticide is reduced to a great extent, the strawberry taste and the strawberry quality are improved, and the harm of pesticide residuals to a human body is reduced at the same time; meanwhile, due to the fact that the manual low-temperature treatment method and the short-day treatment method are adopted, flower bud differentiation of strawberries is accelerated, the indoor temperature rises, the maturing of strawberry is accelerated, and the life demands of people are met.

The invention discloses a method for screening the cold-resistant variety of steeplebush and relates to a method for screening the cold-resistant variety of a garden tree, namely the steeplebush. The invention provides the method for screening the cold-resistant variety of the steeplebush, a technical system and the method for screening the cold-resistant variety of the steeplebush are established in advance for the first time, and the technical blank about the cold-resistance screening of the steeplebush at home and abroad is filled. The method comprises the following steps of: 1, performingoutdoor natural low-temperature treatment on the steeplebush; 2, performing persistent constant and low-temperature treatment on the steeplebush; 3, performing outdoor natural freezing treatment on the steeplebush; 4, calculating subordinate function values of cold-resistance physiological indexes; 5, performing simulative outdoor low-temperature gradient freezing treatment on the steeplebush, and calculating the semilethal temperature of the steeplebush; and 6, determining the cold resistance of the steeplebush according to the average subordinate function value and the semilethal temperature of the steeplebush so as to finish the screening of the cold-resistant variety. In the method, double results, namely the subordinate function values and the semilethal temperature of the cold resistance are combined, so that the simplicity of the cold-resistance screening is overcome, and the cold-resistance screening is highly consistent with the overwintering performance of the steeplebush. The invention provides technical support for screening cold-resistant steeplebush in northern gardens and is applied to the field of the cold-resistance screening of the steeplebush.

The invention relates to a high-strength strain-sensitive polyvinyl alcohol ion hydrogel sensing material, and a preparation method and application thereof. The hydrogel is obtained by fully mixing polyvinyl alcohol with glycerin and deionized water while stirring under strict temperature control conditions, and soaking the mixture in a saturated sodium chloride solution after low temperature treatment. The low temperature treatment promotes formation of a large number of hydrogen bonds between the PVA and the glycerin, and the soaking treatment by the saturated sodium chloride solution promotes entanglement among PVA chains, and interaction between two physical effects of hydrogen bonding and chain entanglement remarkably improves mechanical properties of the hydrogel. Since Na+ and Cl- ions exist in the hydrogel, a hydrogel sensor has a high sensitivity coefficient and can repeatedly and stably detect changes of electrical signals. The synthesis process of the hydrogel sensor is simple to operate and easy to control, raw materials are cheap and easy to obtain and have high biocompatibility and nontoxicity, and a wearable device produced from the hydrogel sensor can safely and effectively monitor the movement of each part of the human body.

The invention discloses a preparation method of a liquid acidic pectinase, belonging to the technical field of enzyme preparations. The preparation method of the liquid acidic pectinase comprises the steps of treating a fermented crude enzyme solution and a blended concentrated solution at normal temperature by using a high-voltage pulsed electric field, and adding a pectin decomposer, a Chinese herb extract, modified dietary fibers and other natural plant raw materials in a blending process, wherein chemical preservatives do not need to be added, and low-temperature treatment is not needed; and then, degerming, filtering, and carrying out sterile filling to obtain the liquid acidic pectinase with stability and long shelf life. Experiments prove that the total bacterial count is 68-102CFU/mL if the liquid acidic pectinase prepared by using the preparation method is stored at room temperature for 12 months; and the enzyme activity loss ratios are respectively 1-1.4% and 0.5-1.1% if the liquid acidic pectinase is stored at 40 DEG C and 0 DEG C for 12 months. The preparation method is simple in process, convenient to operate, energy-saving and environment-friendly.

The invention relates to a cloning and function expression method of an adversity stress AhMYBL6 gene in peanut. The adversity stress AhMYBL6 gene is synthesized by RT-PCR (reverse transcription-polymerase chain reaction) cloning by the steps of preparation and treatment of materials, extraction of RNA (ribonucleic acid) and synthesis of cDNA (complementary deoxyribonucleic acid). The open reading frame of the gene is 861bp, and 287 amino acids are coded totally. The homology of the amino acid sequence of the gene with the MYb family proteins GmMYB4, GmMYB29 and GmMYB29A2 of the soybean is higher than 60%. The fluorescent quantitative PCR verifies the expression patterns of the AhMYBL6 under low temperature, salt stress and drought stress; the result indicates that the expression levels of the AhMYBL6 are obviously enhanced after various stress treatment for 1 hour, and kept at high levels all the time thereafter; and the expression level of the AhMYBL6 in the leaf subjected to low-temperature treatment is maximally enhanced by 20 times. After the gene is transferred into peanut by transgenic means, compared with the control, the transgenic plant has obvious characteristics of cold tolerance, salt tolerance and drought tolerance. The AhMYBL6 gene can obviously enhance the stress tolerance of the peanut.

The invention discloses bacteria capable of synchronously removing organic substances and ammonia nitrogen in water of a slightly polluted water source under low-temperature and aerobic conditions and a screening and domesticating method, which relate to bacteria and a screening and domesticating method and solve the problem that the prior bacteria are unsuitable for treating the slightly polluted water source as well as low temperature treatment. The bacteria SRA10 of the invention are acinetobacter lwoffi which belong to acinetobacter baumannii and are preserved in China General Microbiological Culture Collection Center on January 19th, 2009, with a preservation number of CGMCC No.2889. The screening method comprises the following steps: I, separating and purifying; II, preparing bacterial solution; III, screening and cultivating a bacterial solution; IV, screening and cultivating a bacterial solution with a live strain; V, repeating the step IV for 1 to 2 times, and stepwise domesticating the live strain; and VI, taking a bacterial solution of the domesticated strain, and rescreening the bacterial solution to obtain the bacteria. The bacteria obtained by screening and domesticating can process water of the slightly polluted water source under a condition of a low temperature of 2 to 10 DEG C.

The invention belongs to the technical field of textile printing and dyeing, and in particular relates to a dyeing and finishing technology for a cotton/viscose ammonia multi-fiber stretch fabric employing bio-enzyme low-temperature treatment. The dyeing and finishing technology comprises a pretreatment technology, a dyeing technology and a post-finishing technology. According to the printing and dyeing method for a cotton/viscose stretch fabric, room-temperature stacked desizing is carried out by a biologic desizing enzyme; and an efficient refining agent is selected, so that various pretreatment indexes are effectively improved; soft and fluffy hand feeling of the cotton/viscose stretch fabric is achieved; energy conservation and emission reduction are achieved through low-temperature desizing; potential drapes in the fabric processing process are eliminated; and smooth production of the dyeing procedure is facilitated. A light-colored fabric is dyed from pad dyeing, and a dark fabric is subjected to cold pad-batch dyeing, so that an improvement of various color fastness indexes is met; dyeing process parameters are optimized; and uniform and full dying material quality is obtained. A softening agent is preferably adopted in fabric post-finishing, so that the hydrophilicity of the fabric is achieved; and the wearing comfort of the fabric is achieved.