87results about How to "Overcome Yield" patented technology

The invention relates to continuous high efficiency nano spinning solution (15), a nanofiber nonwovens manufacturing method and a manufacturing device which not only has high manufacturing efficiency but form better thickness of the nanofiber nonwovens. The manufacturing device comprises a solution supply system, a solution feeding pipe (8), a connecting mechanism and a metal roller (6); a metal strainer (10) and a fiber receiving web (11) which have the same shaft with the metal roller are sequentially arranged on the outside of the metal roller (6), an unreel roller (12) and a winding roller (13) are arranged on the fiber receiving web (11), and pores (7) are cut on the hollow metal roller (6). The manufacturing method includes the steps: (1), polymer spinning solution (15) is prepared; (2), an electric field is arranged between the metal roller (6) and metal strainer (10); (3), the metal roller (6) is revolved at a certain speed; (4) a measuring pump (4) is led to the metal roller (6) for even internal inputting; (5), the nanofiber is received. The invention is good for the scale manufacturing of static spinning.

The invention discloses a preparation method of black a phosphene nano sheet. The black phosphene nano sheet is prepared by stripping black phosphorus crystals through liquid phase shear force generated by a high-speed rotation cutter head, wherein the whole preparation process is carried out in an argon environment. The preparation method particularly includes the following steps: placing the black phosphorus crystals and an organic solvent in a stirring barrel; setting the rotation speed of the high-speed rotation cutter head; connecting a power supply to drive the high-speed rotation cutter head to rotate in the stirring barrel; setting stripping time to prepare a dispersion liquid of the black phosphene nano sheet; and finally performing centrifugation, filtration and cleaning to obtain clean black phosphene nano sheets. The preparation method is low in cost and has potential of large-scale production.

The invention discloses preparation and application of human-stem-cell-secreted bioactive factors and a lysis solution. The process comprises the following steps of: extracting stem cells of the umbilical cord or the placenta tissue of a health human person; performing in-vitro culture and amplification; and preparing high-purity and high-activity stem-cell-secreted bioactive factors and bioactive substances in the stem cell (namely, high-purity stem cell lysis solution) by the modern biological technologies of low-temperature separation, purification and the like. According to the invention, the bioactive factors or the substances do not contain any animal component, and can be developed into a product with a cell biological activity; after acting on the human body, the product can activate the stem cell of the organism and repair or replace damaged, lesion and old cells; and the product has the functions of regulating the cell metabolism function of the organism, enhancing the immunity of the organism, delaying the aging and the like. The human bioactive factors or the substances have great application prospect in the fields of medical science, healthcare and beauty.

The invention relates to full-automatic contact type measuring equipment and method. The full-automatic contact type measuring equipment comprises a test bench, a longitudinal sliding table and a cross beam, wherein the longitudinal sliding table is longitudinally and slidably arranged on the test bench and can be used for fixedly placing a measured workpiece, the cross beam is suspended above thetest bench, and at least one measuring arm which can move back and forth along the cross beam is arranged on the cross beam. Compared with the prior art, the equipment in the invention is the equipment specially for rapid and high-precision measurement of the geometric dimension of the large-size workpieces with pores and burrs on the surface, the size of the workpiece is measured by means of a contact type displacement sensor, the defects of the existing measuring method are avoided, so that the influence of the pores and burrs on the surface of the workpiece on precision can be avoided by the measuring equipment, the measurement of the large-size workpiece is more efficient and accurate, relatively complicated workpiece shapes can be adapted to, various dimensions of the thickness, theperpendicularity, the parallelism, the flatness and the like can be measured; meanwhile, the cost of the measuring equipment is lower, and the maintenance and the calibration are simpler and more convenient.

The invention discloses a low-energy-consumption high-yield method for preparing hydrogen from raw gas. The method comprises the following procedures: pre-cleaning; naphthalene removal; transformationand desulfurization; sulfur recovery; refined debenzolization; pressure swing adsorption for hydrogen production; recovery of tail gas; nitrogen production; etc. After pretreatment and naphthalene removal, raw gas is allowed to enter the procedure of transformation and desulfurization so as to obtain more hydrogen and increase the yield of hydrogen, and then desulfurization is carried out in a desulfurization tower; then pure hydrogen is prepared through the procedure of refined debenzolization and the procedure of pressure swing adsorption for hydrogen production; through the procedures of tail gas recovery and nitrogen production, effective hydrogen in desorbed gas is recovered, and hydrogen yield is further increased; and pure nitrogen with a purity of 99% or more is further prepared through a nitrogen production unit. The method provided by the invention substantially reduces the energy consumption of an apparatus for hydrogen production from raw gas, increases hydrogen yield, recovers almost all the effective hydrogen component in the desorbed gas, realizes recovery and graded utilization of each component in the raw gas while guaranteeing low energy consumption and high yield, and by-produces sulfur, pure nitrogen and the other products while preparing pure hydrogen.

The invention discloses a preparation method of a graphene material. The preparation method comprises the following steps of: dissolving powdered graphite into an organic solvent or water to form a suspension; placing the suspension in a container equipped with a gear group, wherein the gear operates at a low speed; taking out slurry for ultrasonic treatment, carrying out high-speed centrifuging so that graphite particles and graphite sheets which are not stripped and torn are precipitated at the bottom of a centrifuging tube through centrifugal action, and a solution on the upper layer comprises a single layer of graphene and multiple layers of graphene; and finally, concentrating and separating the solution on the upper layer to obtain the graphene powder or a stable graphene solution. According to the invention, continuous rotating and stirring of a graphite suspension are carried out by utilizing the gear group, the continuous meshing and tearing of the graphite sheet are carried out through gear teeth, thereby overcoming the disadvantages of multiple defects and low yield in a conventional mechanical method and preparing the graphene in high efficiency and high quality.

The invention relates to a printing and dyeing wastewater pretreatment method based on an anoxic zone phase separation technology. According to the printing and dyeing wastewater pretreatment method, an anoxic zone is divided into a phase I and a phase II, namely a phase for hydrogen production and acid production through fermentation and a methanogenesis phase; an electron donor is provided by organic matters in the wastewater, and dye is effectively decolored in the phase I by using a sulfate reducing process and the reducing capacity of reduzate, namely the sulfide, therefore the biodegradability of the wastewater is improved; and the organic matters can be efficiently removed in the phase II. As an anoxic phase transformation technology in the printing and dyeing wastewater treatment course, the printing and dyeing wastewater pretreatment method is used for providing a two-phase anoxic system and carrying out pretreatment on the printing and dyeing wastewater; the chromaticity and the COD (Chemical Oxygen Demand) removal rates can be effectively increased, the biodegradability of the wastewater can be greatly improved, and the defects that a traditional anoxic process is instable in treatment effect, large in sludge yield and the like are overcome. The printing and dyeing wastewater pretreatment method can be used for effectively removing chromaticity and COD in the printing and dyeing wastewater, the removal rates of the chromaticity and the COD respectively reach more than 95 percent and 60 percent, and the organic loading to subsequent procedures is greatly reduced.

The invention discloses a breeding method of an apple dwarf self-rooting multi-branch nursery stock. The breeding method comprises the following steps: firstly selecting apple dwarf rootstock varieties G41, M9, Pajam1 and T337 as maternal stocks, establishing an apple dwarf rootstock breeding seedbed, and using saw dust to cover newly grown branches of the apple dwarf rootstocks on the seedbed from the beginning of June to the beginning of July, so as to breed the apple dwarf rootstocks with good root systems; planting the apple dwarf rootstocks in a density of 5000-6000 plants per mu in a nursery garden in spring, establishing the nursery garden for producing finished nursery stocks; and grafting apple variety in autumn in the same year to obtain the apple dwarf self-rooting multi-branch nursery stocks in the next year. With the adoption of the cultivation method provided by the invention, the disadvantages of poor quality of nursery stocks produced by the existing stock breeding method, thin and weak nursery stocks, and low survival rate of the nursery stocks in the established nursery garden are overcome.

The preparation method of urea peroxide uses hydrogen peroxide and urea as raw material, and is characterized by that adding urea in hydrogen peroxide whose mass percentage concentration is above 50%, at the same time adding stabilizing agent and crystal habit modification agent, after reaction, obtaining wet urea peroxide, drying to obtain white crystal granules, at the same time coating the surface of said urea peroxide white crystal granule with a layer of coating compound. Said invention is economic and practical, its simple batch yield rate can be up to above 85%, the ure peroxide content is up to above 92%.

The invention relates to a processing process for a salinomycin granular preparation. The processing process includes the following steps that acid fermentation liquor is prepared; the pH value of the salinomycin fermentation liquor is adjusted to range from 4.0 to 5.0 through acid liquor; the acid fermentation liquor is pre-treated, wherein the acid fermentation liquor with the adjusted pH value is subjected to heat preservation for 3-4 hours at the temperature of 60 DEG C to 65 DEG C; the pH value is adjusted into an alkaline state for saponification, and salinomycin feed liquor is prepared, wherein a certain amount of light calcium carbonate is added to the obtained acid fermentation liquor to prepare the salinomycin feed liquor; spray drying is conducted, wherein after spraying particles are added to the prepared salinomycin feed liquor, the salinomycin feed liquor is prepared into particles through a spray drying method, the particles are screened, the particles and auxiliary materials are packaged in a mixed mode, and then the salinomycin granular preparation is obtained. The problems of the low yield and the unideal spraying effect caused by an existing salinomycin granular preparation process are solved.

A preparation method of urea peroxide comprises uniformly mixing urea solution, 25-50% hydrogen dioxide solution, stabilizer and carbowax filming agent, to be dewatered, cooled and crystallized in vacuum of -0.085 to -0.095MPa at a temperature of 40 to 63 DEG C, wherein the weight ratio of hydrogen dioxide in urea and hydrogen dioxide is 1:(1.0-1.4), the stabilizer is a mixture of endrate disodium (EDTA sodium) and citrate at a weight ratio of 1:(1-3), the stabilizer is 0.001-0.5% of urea by weight, and the filming agent is 0.05-0.2% of the urea by weight. The preparation method of urea peroxide can obtain high-stability urea peroxide crystal of high yield, with better crystal form, high stability, simple production process, small volume, no generation of three wastes and application in industrial batch production, while the stabilizer and filming agent have single component to avoid complex treatment.

The invention discloses an electroplating process and electroplating production line of a solar cell sheet solder strip. The electroplating process comprises the following serial steps of: feeding, straightening and flattening, copper strip polishing and softening, electrolyzing for deoiling, copper ion regenerating, high-speed electroplating pretreatment, high-speed electrotinning, neutralizing, cleaning with pure water, tin layer repairing, ultrasonic cleaning, drying, solder strip destressing, fault detection, servo material collection and the like in turn. The electroplating production line is composed of a feeding part, electroplating and pretreatment and post-treatment parts, and a material collection part, which are sequentially connected. According to the invention, a high-performance weldable coating is obtained by adopting a high-grade electrochemical method, thus the defects of a tin hot-dipping process, such as high energy consumption, low yield and the like, are overcome, and efficient production is realized; multiple channels share an identical process, which is environmentally-friendly and energy-saving; the solder strip tin layer produced by adopting the electroplating process has adjustable thickness, very good uniformity and smooth and clean appearance without defects; and by adopting the electroplating process, the defects of tradition hot-dipping tin coating in the appearance and performance are avoided, and the high-quality solder strip can be produced.

The invention provides a preparation method for synthesizing 1-acetyl-7-cyanopyridine-5-(2-amino propyl) indoline which is a key intermediate of silodosin. The method comprises the following steps: 1-acetylindoline is adopted to serve as the material, and 1-acetyl-7-cyanopyridine-5-(2-amino propyl) indoline can be obtained through the such 7 steps as friedel-crafts acylation reaction, phthalimide amination, alkylsilane reduction, nitrification, reduction, heavy nitrogen cyaniding and deprotection. According to the method, the materials in the whole synthesizing line are cost-saving and easy to obtain, the operation is simple and the operation cost is low. Moreover, the yield rate of each step of reaction is higher than that in the prior art. Therefore, the method provided by the invention is very suitable for industrial production and has larger industrial application value.

A hydrogen reducing process for separating Rh from Ir solution includes loading the Rh contanied Ir solution into reactor, heating to a certain temp udner ordinary pressure, introducing H2 to it, and hydrogen reducing reaction to reduce Rh into solid metal. Its advantages are high purity (99% for Rh and 99.99% for Ir), short time, and no pollution.

The invention relates to a combined type MBR (membrane bioreactor) sewage treating and recycling device for an offshore platform, belonging to the technical field of environmental engineering. The combined type MBR sewage treating and recycling device for the offshore platform comprises three box bodies, wherein the box body I is an oil separation tank, wherein an oil retaining clapboard and an oil skimmer are arranged in the oil separation tank, and the oil separation tank is provided with a water outlet communicated with an adjusting tank; the box body II is internally provided with a septic tank and an adjusting tank at intervals, wherein the upper part of the septic tank is provided with a water outlet pipe communicated with the adjusting tank, a coarse grid and an overflow pipe are arranged in the adjusting tank, and the bottom of the septic tank is provided with a sewage submersible pump and a water outlet pipe; and the box body III is internally provided with a hydrolyzed acidification tank and an MBR tank at intervals, wherein the hydrolyzed acidification tank is internally provided with a fine grid, the upper part of the hydrolyzed acidification tank is provided with a water outlet pipe communicated with the MBR tank, an MBR membrane assembly is arranged in the MBR tank, a water collection pipe at the upper part of the MBR membrane assembly is communicated with a recycled water pump, and an aerator pipe at the bottom of the membrane assembly is communicated with a fan. The combined type MBR (membrane bioreactor) sewage treating and recycling device has the advantages of simple structure, high-efficiency energy saving, running continuity and stability, rapidness in assembly, control automation, convenience for operation, and the like.

The invention relates to a full-automatic contact type measuring device and method. The measuring device comprises a test bench, a longitudinal sliding table and a cross beam, wherein the longitudinalsliding table is longitudinally arranged on the test bench in a sliding mode and can be used for fixedly placing a measured workpiece, the cross beam is suspended above the test bench, and a measuring arm which can move back and forth along the cross beam is arranged on the cross beam. Compared with the prior art, the device in the invention is the device specially for rapid and high-precision measurement of the geometric dimension of large-size workpieces with pores and burrs on the surface, a contact type displacement sensor is used for measuring the size of the workpiece, and the defects of the existing measuring method are avoided, so that the influence of the pores and burrs on the surface of the workpiece on the precision can be avoided by the measuring device, the measurement of the large-size workpiece is more efficient and accurate, relatively complex workpiece shapes can be adapted to, and various dimensions of the thickness, the perpendicularity, the parallelism, the flatness and the like can be measured; meanwhile, the cost of the measuring device is lower, and the maintenance and the calibration are simpler and more convenient.

The invention discloses a flavonoid extract from persimmon leaves and a preparation method thereof, the method comprises the steps as follows: the persimmon leaves are crushed, and extracted for once to three times by low carbon alcohol with each time lasting for 5-180min, the extracting solution is mixed, the low carbon alcohol is recovered, condensed and centrifuged, the supernatant is purified by macroporous resin column, the column is washed with water, and then with the low carbon alcohol, the eluent is collected, after the eluent is condensed and the low carbon alcohol is recovered, the eluent is extracted for two to five times by an organic reagent, the extracting solution is condensed and dried, thus obtaining the flavonoid extract from the persimmon leaves. The method adopts the processes of alcohol extraction, macroporous resin purification and ethyl acetate extraction to extract flavonoid substances from the persimmon leaves, overcomes the defects of low yield and low content of flavonoid substances from the persimmon leaves in the prior art, simplifies the production process, has easy operations, reduces production cost, extracts effective components fully and avoids the loss of effective components; the content of the flavonoid substances in the extract is high, with the weight content up to 80-98%.

The invention discloses an efficient adsorbent for separating CO and a preparation method of the efficient adsorbent for separating CO. The preparation method comprises the following steps: weighing a predetermined amount of silica sol, adding a water source for dilution, then dropwise adding an aluminum source solution, a sodium source solution and a copper source solution into the diluted silica sol sequentially, and stirring uniformly to obtain a liquid mixture; aging the liquid mixture for 6 to 10 hours at the room temperature, then adding the liquid mixture to a high-pressure reactor, continuously stirring at the temperature of 95 to 110 DEG C, taking out the mixture after carrying out crystallization for 7 to 12 hours, and washing and filtering the mixture to obtain a solid; performing vacuum drying for the solid at the temperature of 100 to 120 DEG C, and then calcining the solid for 4 to 6 hours under the atmosphere of nitrogen at the temperature of 400 to 500 DEG C to obtain the high-efficient adsorbent for separating CO. The efficient adsorbent for separating CO is prepared with the method and is high in CO selectivity and CO yield. Furthermore, a template agent is not required to be added in the adsorbent, and the high-efficiency adsorbent has a simple preparation process, so that the preparation cost of the adsorbent is effectively lowered.

The invention discloses a method for preparing a midbody of medicine febuxostat of 2-(3-cyano-4-isobutyl methoxyphenyl)-4-methylthiazol-5-ethyl formate, which comprises the following steps: using cyano phenol as raw materials, taking reaction to obtain 4-hydroxide thiobenzamide, carrying out cyclization to obtain 2-(4-hydroxy phenyl)-4-methylthiazol-5-ethyl formate, carrying out formylation to obtain 2-(3-carboxaldehyde-4-hydroxy phenyl)-4-methylthiazol-5-ethyl formate, carrying out isobutyl reaction to obtain 2-(3-carboxaldehyde-4-isobutyl phenyl ether)-4-methylthiazol-5-ethyl formate, and carrying out cyanation to obtain the 2-(3-cyano-4-isobutyl methoxyphenyl)-4-methylthiazol-5-ethyl formate. The raw materials used by the method disclosed by the invention can be easily obtained, the reaction conditions are mild, the cost is lower, and the method is applicable to industrialized production.

The invention provides a method for artificially synthesizing phospholipid DPPC (dipalmitoyl phosphatidylcholine).The target product, DPPC, is synthesized from glyceryl phosphoryl choline and palmitic acid through condensation reaction.The method is simple in step, mild in reaction and suitable for industrial production.The prepared DPPC can be used for various medicines such as injection, tablets and capsules as a pharmaceutical adjuvant.

The invention provides a synthetic method of terbinafine. Monomethylamine, 1-chloromethyl naphthalene and 1-chloro-6,6-dimethyl-2-heptene-4-alkyne are subjected to a one-step reaction to generate theterbinafine. Particularly, the monomethylamine is slowly added into a solvent, and then an acid-binding agent is added; the 1-chloromethyl naphthalene and the 1-chloro-6,6-dimethyl-2-heptene-4-alkyneare simultaneously slowly dropwise added, and a dropwise adding speed is controlled so as to enable both the 1-chloromethyl naphthalene and the 1-chloro-6,6-dimethyl-2-heptene-4-alkyne to be simultaneously dropwise added up; a temperature control reaction is performed for 2 to 3 hours at a temperature of 10 to 20 DEG C; chloroform is added to extract reaction liquid, vacuum concentration is carried out on an organic layer to a dry state, and ethyl acetate is added into residues to carry out crystallization to obtain the terbinafine. The synthetic method is high in yield, simple in step and convenient to operate, generates few byproducts, and is beneficial to industrial production.

The invention discloses a method for extracting and separating L-valine from fermentation liquor by employing membrane separation and electroosmosis combined technology and belongs to the technical field of biochemical engineering. The method comprises the steps of (1) removing thallus from fermentation liquor; (2) carrying out electroosmosis to clear fermentation liquor to remove inorganic salt; (3) removing small-molecule protein and pigment impurities form clear desalted liquid; (4) carrying out preconcentration to the fermentation liquor with reverse osmosis membrance, and (5) concentrating and crystallizing the fermentation liquor. The method disclosed by the invention has the characteristics that the condition is mild, the operation is simple, the separation steps are less and the selectivity is good; the defects of low yield, large sewage discharge and high production intensity of the existing ion exchange technology are overcome, and the yield and quality of the L-valine are significantly improved.

The invention discloses an insect-resistant short-season cotton new variety selection breeding method comprising following steps: 1) hybridizing a transgenic Bt cotton regular insect-resistant cotton inbred line Lu-55 with a short-season cotton line Lu-458 as parents; 2) planting an F1 generation in Hainan Province in winter, mixed-harvesting the F1 generation, spring-sowing an F2 separated generation in mainland at about 20th, April, selecting early-maturing and insect-resistant superior plants according to breeding objects, and summer-sowing an F3 generation in mainland at about 30th, May; 3) continuously selecting early-maturing and insect-resistant superior plants from superior plant rows, performing inspection of various growth periods and agricultural characters; 4) continuously performing plant row comparison and identification to F4-F5 generations and an F6 generation, selecting early-maturing and insect-resistant superior plants from the superior plant rows until the characters are stable; 5) testing the quality of fibers through primary selection in field, cotton harvesting and yield calculation and inner seed inspection; and 6) finally selecting a superior plant row, and raising the superior plant row to the next level new strain and performing multipoint comparison identification test. The selection breeding method broadens utilization range of germplasm resources of short-season cotton, overcomes a negative relationship of early maturity to yield and quality characters, and can be used for selecting new varieties, which are shorter in growth period, are insect-resistant, are high in yield and are high in quality, of the short-season cotton.

The invention discloses a grass carp feed capable of increasing the culture yield and a manufacturing method thereof. The feed is composed of the following raw materials in parts by weight: 150 to 200 parts of barley flour, 150 to 180 parts of corn flour, 120 to 150 parts of bean cake, 60 to 80 parts of corn vinasse, 40 to 60 parts of flour, 30 to 40 parts of rice bran, 30 to 40 parts of ryegrass, 20 to 30 parts of clover, 5 to 10 parts of garlic, 50 to 60 parts of wheat middling, 20 to 30 parts of bone meal, 3 to 4 parts of welsh onion, 4 to 5 parts of leek, 0.2 to 0.3 part of yeast powder, 3 to 4 parts of mint, 2 to 3 parts of stevia rebaudiana, 2 to 3 parts of hyssop, 25 to 30 parts of watermelon peel, 20 to 25 parts of hyacinth bean leaf, 10 to 15 parts of camellia, 25 to 30 parts of strawberry jam, 25 to 30 parts of sugar dreg, 20 to 25 parts of monosodium glutamate dreg, 1 to 2 parts of salt, 3 to 4 parts of sargassum thunbergii powder, 5 to 6 parts of water caltrop powder, 10 to 15 parts of phagostimulant, and a proper amount of water. The provided feed overcomes the conventional grass carp feed shortages that the components are simple, the energy is insufficient, the taste is bad, the growth of the grass carp fed by the feed is slow, the meat quality is bad, and the yield is low. The provided feed is rich in nutrients, has a good taste, can promote the growth and weight gain of grass carp, and is capable of shortening the growth period, improving the meat quality, meat taste and palatability, and increasing the yield and culture economic profit.

The invention discloses a planting method of high-benefit and pollution-free green tea trees. The planting method comprises steps as follows: (1) garden selection; (2) garden treatment; (3) planting of green tea tree seedlings; (4) interplanting of Chinese toon trees; (5) planting of vetiver grass; (6) fertilizer and water management; (7) pest control; (8) picking of finished products. According to the planting method of high-benefit and pollution-free green tea trees, through interplanting of the Chinese toon trees and planting of the vetiver grass in a garden, the quality of green tea is greatly improved, the yield of green tea is greatly increased, the problem that the yield and quality of green tea produced with existing green tea cultivation methods cannot meet the demands of consumers is solved, pollution-free management measures are taken in culture and growth processes, the quality of the green tea is further stabilized, finally, the comprehensive economic benefit per mu yield of green tea planting is increased by 50%-60%, the content of four heavy metals including copper, mercury, lead and arsenic in the green tea is measured to be 70% lower than or above that in existing green tea, and the quality of green tea is greatly improved.

The invention belongs to the technical field of fermentation engineering, and particularly relates to a method for producing biological organic acid by using a dynamic expanding adsorption reactor system. In a microbial cell fermentation process, a biological organic acid target product is secreted in extracellular fermentation solution together with the growth of microbial cells, an enzyme system participating in the microbial cell growth metabolism is subjected to feedback suppression of the biological organic acid target product at the moment so that the metabolism velocity of the cells is reduced, and the fermentation solution with the microbial cells is directly pumped into an expanded bed chromatographic column filled with a separation medium in a dynamic expanding adsorption reactor so as to realize on-line adsorption of the biological organic acid target product through certain adsorption and separation processes and avoid plugging the chromatographic column; and the fermentation solution from which the biological organic acid target product is removed can be circularly refluxed to a fermentation tank. The suppression on the growth of the microbial cells is relieved, the growth vitality of the microbial cells is recovered, the biomass of the microbial cells is improved, and the yield of the biological organic acid product is increased.

The invention provides a method and apparatus for total no-tillage planting operation through blanketing wheat with overall maize stalks, wherein the complete stalks of the harvested maize are pulled down in situ in the field, and the wheat seeds are planted through trench digging between the maize planting rows. The maize complete stalk blanketing wheat no-tillage planting and fertilizer applicator set provided by the invention can realize the operations of upright maize stalk pulling down, combing, wheat seeding, fertilizing, suppressing and stalk compression.

The present invention discloses the apply of Arabidopsis thalianum polyphosphoinositide 6- / 3-kinase gene in plant salt resistance. Polyphosphoinositide 6- / 3-kinase gene is first cloned from target plant and then connected to corresponding vector in proper molecular biological and transgenic measures to produce transgenic plant. Applying the gene can provide one technological way for solving the problem that plant, including grain and economic crop, has low survival rate, slow growth speed and low yield in high salt environment, and is favorable to normal growth of plant in high salt area.

The invention relates to a preparation method of high-purity biapenem, which includes the steps of: (A) carrying out a condensation reaction with a compound represented as the formula V and a compound represented as the formula VI in an acetonitrile solvent in the presence of a less amount of N,N-dimethylformamide and an organic alkali to obtain a compound represented as the formula VII; (B) carrying out a catalytic hydrogenation to the reaction product in the step (A) in a mixed solution composed of an alcohol solvent and a non-proton polarity organic solvent in the presence of a catalyst and an organic alkali to remove a carboxylic acid protective group in the compound represented as the formula VII; and (C) filtering a reaction mixed solution to obtain a filter cake, adding the filter cake in water with stirring to obtain a filtrate, mixing the filtrates, adding an organic solvent under stirring, performing precipitation crystallization, and filtering and drying a product to obtain the biapenem.