36results about How to "Good heredity" patented technology

The invention relates to a production method of spheroidal graphite cast iron for hydraulic parts and prepared spheroidal graphite cast iron. The production method comprises the following steps of a material proportioning procedure, a charging melting procedure and a nodulizing inoculation procedure. In the material proportioning process of the material proportioning procedure, the adopted raw materials by weight part comprise 25-35 parts of pig iron for steelmaking, 33-43 parts of steel scrap, 26.5-36.5 parts of scrap return, 0.3-0.5 part of red copper and 0.5-2.5 parts of carburizing agent.A completely new formula is adopted. As a defined amount of red copper is added in ferritic nodular iron, a matrix structure can be added with 20-40 percent of pearlite content, the hardness can be increased by 8-10 percent, the tensile strength can be increased by 9-11 percent, the yield strength can be increased by 8-10 percent, and the elongation can be reduced by 20-30 percent. The too-soft defect of the ferritic nodular iron in the machining process can be obviously overcome, and the machining performance is increased.

The invention discloses a PCI optimization method in an LTE long-term evolution network and a system and relates to the mobile communication technology field. In an embodiment of the invention, a genetic algorithm is used to optimize a PCI distribution scheme; relative to a traditional optimization mode, in the genetic algorithm, evolution search calculating is performed from a string set; a coverage area is large, which is good for global prioritizing; PCI signal optimization analysis is accurate and reasonable; accurate and reasonable planning and adjustment can be performed on a wireless network signal and integral performance of an LTE wireless network is radically improved and increased. Crossover operation and mutation operation are firstly performed on an auxiliary synchronization signal SSS of each PCI group in a current candidate group. And then the crossover operation and the mutation operation are performed on a main synchronization signal PSS in each PCI group so that a condition that a same PSS is distributed in a same station during PCI distribution can be avoided and a severe same-mode interference condition of a model 3, a model 6 and the like can be greatly reduced.

The invention discloses a preparation method of yoghourt. The method comprises the following steps: cooling a sterilized material to 43-45 DEG C at the cooling inoculation phase for preparing the yoghourt; adding a mixed working fermentation bacteria agent, wherein the adding amount is 1-4% of that of the materials, and the mixing working fermentation bacteria agent is a mixed bacteria agent of lactobacillus plantarum, lactobacillus bulgaricus and streptococcus thermophilus. Cooperative fermentation of the yoghourt is carried out by adopting the lactobacillus plantarum, the streptococcus thermophilus and the lactobacillus bulgaricus. The produced yoghourt also has the characteristics of being high in viscosity, strong in water binding capacity and good in post-acidification.

The invention discloses a smelting method for producing nodular iron castings by using scrap steel, which comprises: step 1, adding steel into a furnace, adding a carburant on the steel, and then heating the steel so that the steel is melted down and carburized sufficiently; step 2, adding steel again, and adding foundry returns into the furnace; step 3, adding a nodulizer and an inoculant for nodularization and inoculation; and step 4, casting. The method adopts the prior method for smelting the nodular iron castings in an electric furnace and uses the scrap steel to produce the nodular iron castings. The principle of the method is that the main difference between steel and iron is carbon content, and the steel becomes the iron by carburizing to certain degree. The method has the advantages of low cost because the scrap steel is cheaper than nodular pig iron, good quality because the transmissibility of the scrap steel is better than that of the nodular pig iron, two times of specific elongation under the condition of stable tensile strength, and less waste products because the waste products caused by unqualified mechanical property are almost not generated.

The invention discloses a manufacturing method for the forged materials and rolled bar materials of a 1Cr15Ni36W3Ti alloy, for nuclear power, and aims at increasing the room-temperature strength and the high-temperature strength of the alloy. The following technical scheme is adopted: a non-vacuum induction and electroslag smelting method is adopted, and the strength of the alloy under room temperature and high temperature is increased through dispersion strengthening for carbides in the alloy; fine crystal gains can be obtained by controlling the heating temperatures of forging cogging, forging forming and rolling; the crystal gains can be recrystallized by controlling the temperatures of finish forging, forging forming and finish forging, and finish rolling; and the single-hammer reduction amount of a cogging process of a high-speed forging machine is controlled to be 60mm-80mm, the machining ratio reaches 3-5, and the total deformation amount of finish forging is controlled to be 30%-50%. Maintenance for the uniformity and consistency of the interior structure and performance of the alloy is benefited through the reasonable machining ratio and deformation amount, and the phenomena of coarse crystal grains and mixed crystals are effectively avoided. The manufacturing method disclosed by the invention has the following beneficial effects: the gaps of a production process for the 1Cr15Ni36W3Ti alloy in China are filled, the room-temperature and high-temperature performance of the alloy are improved, and the manufacturing method is successfully applied to manufacturing for nuclear power equipment in China.

This invention provides a cryptomere aluminum ingot, its components quality fraction is that Al 99.5~99.9%, Ti 0.01~0.20%, impurity íœ 0.03%. it also provides method of preparing cryptomere aluminum ingot. On the condition of electrolytic aluminum production facility and manufacturing technique not changed, a certain rate titanium oxide is added to electrolyte, through different titanium adding days, cryptomere aluminum ingot of quality fraction is 0.01~0.20% of titanium is got by using alumina-titanium oxide-cryolite fusion electrolysis eutectrol process. Because of its special titanium adding mode, the production cost is cheap, product crystal grain thinning capability is strong, high temperature resistant capability is strong, long residual action is good, heritability is good and titanium recovery is high.

The invention belongs to the field of machining and manufacturing of a dairy product, and relates to a preparation method of yogurt. A mixed fungicide is prepared from lactobacillus plantarum, lactobacillus bulgaricus and bifidobacterium animalis, wherein the mass ratio of the lactobacillus plantarum to the lactobacillus bulgaricus to the bifidobacterium animalis in the mixed fungicide is 1:(0.2-0.5):(0.1-0.2); the lactobacillus plantarum is Li-2013-01 with the preservation number being CGMCC No.7928. Cooperative fermentation of the yogurt is carried out by adopting the lactobacillus plantarum, streptococcus thermophilus and the lactobacillus bulgaricus, and the generated yogurt also has the characteristics of being high in viscosity, strong in water binding capacity and good in post-acidification.

The invention relates to a method for tissue culture and rapid propagation of thornless safflower, and provides a seed disinfection method, and an optimal bud proliferation culture medium and an optimal culture medium for inducing buds to root. The method comprises four steps of obtaining aseptic seedlings, proliferating buds, inducing the buds to root, and hardening off and transplanting; and a great number of young plants of the safflower are obtained in short time. The method has the advantages of simpleness, quick propagation, strong stability, short cultivation period, and high rooting rate and easy survival of the thornless safflower, has strong feasibility in the actual production and application, is suitable for industrial cultivation of Xinjiang safflower, and also lays a foundation for researching Yumin thornless safflower polyploidy new species.

The invention discloses optimization for a heat treatment method for a 1Cr15Ni36W3Ti alloy bar for nuclear power, and aims at further improving the strength value of an alloy at the room temperature and the high temperature through optimization of an alloy finished product heat treatment method. According to the technical scheme, the direct aging heat treatment technology is adopted, and air cooling is conducted after heat preservation is conducted for 50 h within the range of 700 DEG C+ / -10 DEG C. The gamma' content in the alloy obtained through the optimized heat treatment technology is obviously increased, grains are fine and uniform, and the strength of the alloy at the room temperature and the high temperature can be obviously improved; and meanwhile, the plasticity of the alloy is not reduced, the allowance of the mechanical performance of the 1Cr15Ni36W3Ti alloy is improved, and stability of the alloy in the service process is further guaranteed. The optimization has the beneficial effects that the tensile strength of the alloy at the room temperature and the high temperature is obviously improved, and meanwhile the tensile plasticity of the product is not obviously reduced.

The invention discloses a molecular marker and a screening method of gift strain nile tilapia oreochromis niloticus streptococcus iniae infection resistant family. The molecular marker is a sequence shown in SEQ ID NO.20; the screening method comprises five steps of streptococcus iniae infection, genome DNA extraction, primer screening, SRAP-PCR (Sequence-Related Amplified Polymorphism-Polymerase Chain Reaction) amplification and sequencing and analyzing, by the method, a parent family with stronger resistance to streptococcus iniae disease can be found more accurately and quickly, after enhanced cultivation, the parent family can be used as the parent for fingerlings propagation. The molecular marker screened out is prepared into a probe for detecting different parent families, the probe can sort out the streptococcus iniae disease resistant parent more simply and accurately, and selection of parent among different families is facilitated. Meanwhile, by using the bred disease-resistant parent as the propagation parent, quality of fingerlings can be improved further, and culture benefit of gift strain nile tilapia oreochromis niloticus can be increased.

The invention relates to a method for modifying raw aluminum liquid of A356 alloy with cerium-rich mixed rare earth. The specific technical scheme is (1) the raw aluminum liquid of A356 alloy is melted in an industrial mixing furnace, and the melting temperature is controlled at 710-740°C. The time is controlled at 90-150min, the first magnetic stirring time is 20-40min, the first refining temperature is 680-700°C, and the first refining time is 30-60min; (2) The modifier is aluminum-mixed rare earth intermediate Alloy: Al-6~7wt%RE, the mixed rare earth is cerium-rich mixed rare earth, in which the cerium content is greater than 70wt%; the material to be modified is the original aluminum liquid of A356 alloy; (3) after the first refining slag removal, add Add an aluminum-cerium-rich mixed rare earth master alloy to the original aluminum liquid, and the amount of cerium-rich mixed rare earth added is 0.03wt%-0.1wt%; (4) The modification temperature is 720-735°C; (5) The modification time is 10-30min; (6) Magnetic stirring for the second time, the stirring time is 5-15min; (7) After reaching the metamorphic time, carry out the second refining, the second refining temperature is 670-690°C, and the second refining time is 20-50min; (8) Pouring after standing, the pouring temperature is controlled at 650-680°C. Its advantages are: good metamorphism effect, small burning loss, good heredity, and low cost.

The invention discloses a seedling cultivation method from Rhodiola crenulata (HK. f. et.Thoms) H. Ohba seeds on highland. The method comprises: (1) using test tube-cultured seedlings as a seedling source, soaking the seeds for 12-24 hours, soaking the soaked seed in ethanol for 30+ / -5 s firstly, and then soaking the obtained seeds in HgCl for 25-30 min; (2) then conducting rinsing with sterile water for 3-5 times, and then absorbing water on the surface of the explants for later use; (3) under the sterile conditions, performing inoculation to an Ms culture medium, after the seeds germinate, transferring the seedlings to a 1 / 2 Ms culture medium, simulating the wild environment, controlling the temperature difference between the daytime and night, inducing formation of lignified roots, andthen transplanting bottle hardened seedlings into a medium; (4) performing final planting in the field about 6 months after transplanting of the hardened seedlings, and performing harvest about a month later. The method is mainly applicable to planting of Rhodiola crenulata (HK. f. et.Thoms) H. Ohba in Tibet and other plateau regions, no hormone treatment is needed, the seeds are adopted as the explant materials, and the seedling raising method which achieves induction of the lignified roots through regulating temperature difference, illumination and aseptic culture of a culture chamber has ahigh reproduction speed and good heritability.

The invention relates to a preparation method for a magnesium-based composite material, in particular to a preparation method for lost foam casting of a high-entropy alloy particle-reinforced magnesium-based composite material. The method aims to solve the technical problem that in the preparation process of an existing magnesium-based composite material, the addition proportion of magnesium alloywaste is small, and the strength is poor when a large amount of magnesium alloy waste is added. By adopting a lost foam casting method, utilizing two-way shear stirring, adding high-entropy alloy particles and performing ultrasonic treatment in the casting process, structure heredity is effectively improved, uneven dispersion of the particles at different positions of a magnesium alloy melt is avoided, structure coarsening is reduced, grain growth in the solidification process is inhibited, grains are refined, the utilization rate of magnesium alloy waste is increased, and the performance ofthe lost foam casting product is improved. In the method, the utilization rate of AZ91D waste is high, the maximum waste addition amount accounts for 34% of the total mass, raw materials are saved, and costs are reduced. The method is also suitable for continuous production operation and is an environment-friendly method.

The invention relates to a method of producing breeds of small stress-resistant spotted-brown chickens suitable for stewing; small spotted-brown chickens artificially cultivated used as first male parents of a complete set line and local yellow-feather chickens used as first female parents of the complete set line are subject to the production of F1 generation; hens which are 66 weeks old, lay more than 170 eggs and have yellow feather, feet and skin are selected from the F1 generation as breeds; hens which are 16 weeks old and weigh from 1100 g to 1300 g are selected as individual breeds; second female parents of the complete set line are formed under the breed retention rate of 60-70%; local spotted-feather chickens weighing within the average weight range + / -10% are selected as second male parents of the complete set line; the second male parts and the second female parents are hybridized to obtain F2 generation that is small stress-resistant spotted-brown chickens suitable for stewing. The spotted-brown chickens cultivated by the method have increased commercial uniformity and survival rate, have significant hybrid vigor; small stress-resistant spotted-brown chickens that are 18-20 weeks old can go to the market; the small stress-resistant spotted-brown chickens have much deposition of flavor substances, fat of the chickens is free of foul smell, and the chickens are most suitable for stewing.

The invention discloses a polygonatum sibiricum seedling raising method. The method comprises the following steps of seed collection and disinfection, sterile culture, seedling hardening and transplanting. According to the method, by adopting seeds of mature capsules for direct breeding and regulating the temperature, light, and humidity of a culture chamber, the seeds are induced for seedling raising through sterile culture, the cost is low, seedling raising is quick, the hereditary is good, the polygonatum sibiricum seedling raising efficiency is improved; after seedling hardening treatment,the survival rate of seedlings is increased, and the reproduction is vigorous.

The invention relates to a synthetic method of artificial seeds of picea mongolica. Somatic embryos induced by callus are used as artificial seed embryos of the artificial seeds, the somatic embryos are dried to serve as an embedding substance, artificial endosperm comprises 1 / 4 LM, 0.5 mg / L IBA and 20 g / L sucrose, artificial seed coats are prepared by immersing the artificial seed embryos and theartificial endosperm into an artificial seed coat solution for curing, and the artificial seed coat solution comprises sodium alginate with mass percentage concentration of 2-3% and CaCl2 with mass percentage concentration of 1.5-2.5%. The artificial seeds of the picea mongolica are not limited by seasons and have better nutrient supply and disease resistance. The synthesis of the artificial seeds of the picea mongolica can solve major problems of low yield of seeds of the picea mongolica, lack of seedlings, resource protection, maintenance of good traits and the like, and the picea mongolicais convenient to transport, so that the picea mongolica is better applied to timber forests for ecological construction and building such as sand treatment.

The invention discloses a preservative for unpicked litchis and longans on trees and a preparation method thereof. The components of the preservative are as follows (parts by weight of each component are shown in brackets): mancozeb (200 to 300), fosetyl-aluminum (300 to 400), urea (13 to 18), phosphatic fertilizer (90 to 110) containing 14% phosphorus, potassium chloride fertilizer (50 to 80) containing 60% potassium, borax (30 to 60), peanut bran (500 to 800), copper sulfate (0.5 to 0.13) with the purity of 0.7 to 0.9%, ferrous sulfate (0.05 to 0.1) with the purity of 0.78 to 0.89%, and glucose (5 to 8) with the purity of 0.09 to 0.13%. The steps of the preparation method are as follows: 1. the mancozeb and the fosetyl-aluminum are dissolved in water; 2. after water is added to solution obtained in step 1, the urea, the phosphatic fertilizer, the potassium chloride fertilizer, the borax, the peanut bran, the copper sulfate, the ferrous sulfate and the glucose are respectively dissolved, soaked, stirred and filtered in the solution so as to prepare a finished product. Being cheap, convenient, practical and safe, the preservative not only can delay the ripening of the litchis and the longans on the trees, but also can delay the harvesting time of the litchis and the longans.

The present invention relates to a method for synthesizing artificial seeds of spruce spruce. The artificial seed embryo adopts the somatic embryo induced by callus, and the somatic embryo is used as embedding after being dried, and the artificial endosperm includes 1 / 4LM, 0.5mg / L of IBA and 20g / L of sucrose, the artificial seed coat is made by immersing the artificial seed embryo and artificial endosperm into the artificial seed coat liquid and solidifying, and the artificial seed coat liquid includes the mass percentage concentration 2-3% sodium alginate and 1.5-2.5% CaCl by mass 2 . The sandy spruce artificial seed of the invention is not limited by seasons, and has better nutrient supply and disease resistance. The synthesis of artificial seeds of spruce sand will solve major problems such as low seed yield, shortage of seedlings, resource protection and maintenance of excellent traits of spruce sand, and it is also convenient for transportation, so that spruce sand can be better used in sandy land Ecological construction such as governance and construction of timber forests.

The invention belongs to the field of machining and manufacturing of a dairy product, and relates to a preparation method of yogurt. A mixed fungicide is prepared from lactobacillus plantarum, lactobacillus bulgaricus and bifidobacterium animalis, wherein the mass ratio of the lactobacillus plantarum to the lactobacillus bulgaricus to the bifidobacterium animalis in the mixed fungicide is 1:(0.2-0.5):(0.1-0.2); the lactobacillus plantarum is Li-2013-01 with the preservation number being CGMCC No.7928. Cooperative fermentation of the yogurt is carried out by adopting the lactobacillus plantarum, streptococcus thermophilus and the lactobacillus bulgaricus, and the generated yogurt also has the characteristics of being high in viscosity, strong in water binding capacity and good in post-acidification.

The invention relates to a production method of spheroidal graphite cast iron for hydraulic parts and prepared spheroidal graphite cast iron. The production method comprises the following steps of a material proportioning procedure, a charging melting procedure and a nodulizing inoculation procedure. In the material proportioning process of the material proportioning procedure, the adopted raw materials by weight part comprise 25-35 parts of pig iron for steelmaking, 33-43 parts of steel scrap, 26.5-36.5 parts of scrap return, 0.3-0.5 part of red copper and 0.5-2.5 parts of carburizing agent. A completely new formula is adopted. As a defined amount of red copper is added in ferritic nodular iron, a matrix structure can be added with 20-40 percent of pearlite content, the hardness can be increased by 8-10 percent, the tensile strength can be increased by 9-11 percent, the yield strength can be increased by 8-10 percent, and the elongation can be reduced by 20-30 percent. The too-soft defect of the ferritic nodular iron in the machining process can be obviously overcome, and the machining performance is increased.

The invention discloses a breeding planting method of little-seed rool first-filial generation, which comprises the following steps: screening superior local type, crossing, selecting originally, selecting secondly, adopting multi-year purifying regenerative self-crossing 99-6 as father and long round number 1 as mother, crossing, selecting base ground, allocating nourishing soil, sanitizing, lifting bed geothermal, disposing seed, sowing, managing sprout, planting, managing after planting, gathering pollen, reserving, emasculating to pollinate, picking, reaping, producing hybrid seeds of regenerating eggplant.

The invention discloses a Cu-Si-B middle alloy with 50.0-78.0 Cu, 20.0-48.0 Si and 0.5-5 B and making method of eutectic aluminum-silicon alloy in the deteriorate industry, which comprises the following steps: preparing pure copper, crystal silicon and Cu-B middle alloy material according to proportion; melting Cu-Si-B middle alloy in the fusion furnace at 1300-1500 deg.c; adding crystal silicon; stirring rapidly to react completely; casting directly to produce ingot. The invention possesses rapid melting speed with stable deteriorating effect without phosphor, which is new typed industrial crystal aluminum-silicon alloy alterant.

The invention discloses a method for preparing yoghurt, which belongs to the field of dairy product processing and manufacturing. The preparation method of the yogurt specifically includes the following steps: acceptance of raw milk, sterilization, storage, standardization, batching, degassing, homogenization, secondary sterilization, cooling, inoculation, stirring and fermentation, cooling, crushing curd, filling , cooling, post-cooking. On the basis of inheriting the traditional Streptococcus thermophilus and Lactobacillus bulgaricus for yogurt fermentation, the present invention adds Lactobacillus plantarum with high acid production and strong stability, and cooperates with Streptococcus thermophilus and Lactobacillus bulgaricus to improve the overall bacteria The stability of the species prevents the imbalance of the ratio of bacilli and cocci, solves the problem of poor coagulation state of yogurt, makes the sour taste of yogurt suitable and refreshing, and has a typical and prominent flavor of yogurt; at the same time, the strong acid production capacity of Lactobacillus plantarum in the fermentation process , can speed up the fermentation speed of yogurt, shorten the production cycle, and save the cost of manpower, energy consumption, equipment and so on.

The invention discloses a manufacturing method for the forged materials and rolled bar materials of a 1Cr15Ni36W3Ti alloy, for nuclear power, and aims at increasing the room-temperature strength and the high-temperature strength of the alloy. The following technical scheme is adopted: a non-vacuum induction and electroslag smelting method is adopted, and the strength of the alloy under room temperature and high temperature is increased through dispersion strengthening for carbides in the alloy; fine crystal gains can be obtained by controlling the heating temperatures of forging cogging, forging forming and rolling; the crystal gains can be recrystallized by controlling the temperatures of finish forging, forging forming and finish forging, and finish rolling; and the single-hammer reduction amount of a cogging process of a high-speed forging machine is controlled to be 60mm-80mm, the machining ratio reaches 3-5, and the total deformation amount of finish forging is controlled to be 30%-50%. Maintenance for the uniformity and consistency of the interior structure and performance of the alloy is benefited through the reasonable machining ratio and deformation amount, and the phenomena of coarse crystal grains and mixed crystals are effectively avoided. The manufacturing method disclosed by the invention has the following beneficial effects: the gaps of a production process for the 1Cr15Ni36W3Ti alloy in China are filled, the room-temperature and high-temperature performance of the alloy are improved, and the manufacturing method is successfully applied to manufacturing for nuclear power equipment in China.

The invention relates to a tissue culture method of corydalis pygmaea (an endangered Tibetan medicine). The tissue culture method comprises the following steps: sterilizing selected plant buds with ethanol and a HgCl2 solution successively, and then rinsing with sterile water to obtain sterile explants; and carrying out inoculation, shoot bud culture and induction, rooting culture, plantlet hardening and transplanting, and fixed planting on the sterile explants under aseptic conditions, so as to harvest corydalis pygmaea. The tissue culture method provided by the invention fills the blank of tissue culture technique of corydalis pygmaea, is not subject to seasonal restrictions and can be used to produce seedlings all the year round and realize artificial breeding. According to the tissue culture method, the top bud tissue of high-quality robust corydalis pygmaea is sterilized to obtain sterile tissue which is subject to segmentation and differentiation to obtain complete plants, whichhave low cost, can be bred fast, can adapt to high temperature difference, low temperature and strong ultraviolet ray of special environment in a plateau region, have a high seedling speed and good heredity, and can produce seedlings all the year round.