266results about How to "Reduce inhibition" patented technology

The invention belongs to the technical field of molecular biology, and discloses a glucosyltransferase mutant, a construction method of the glucosyltransferase mutant, a construction body, a mutant expression strain, application and a preparation method of rebaudioside M. Compared with original glucosyltransferase (comprising an amino acid fragment with the sequence shown as SEQ ID NO: 1), the glucosyltransferase mutant provided by the invention comprises one or more of L79T mutation, S195 V mutation and Y387V mutation. The glucosyltransferase mutant has excellent enzyme activity and can be cooperated with existing sucrose synthase to realize a multi-cascade enzyme catalytic reaction, and sucrose, rebaudioside D and uridine diphosphate are used as raw materials to realize high-efficiency and low-cost industrial production of rebaudioside M.

The invention provides a method for sterile sowing and efficient propagation of cymbidium faberi. The method comprises the following steps: pretreatment of cymbidium faberi seeds, sterile germination of the cymbidium faberi seeds, protocorm proliferation, differentiation, seedling strengthening and acclimatization and transplantation. The pretreatment comprises the steps of refrigerating hybrid seeds of cymbidium orchid at 4 DEG C, performing secondary disinfection with sodium hypochlorite, performing dark culture for 10-30 days after sowing, and then performing light culture, and the germination culture medium is prepared by taking 1 / 4 MS as a basic culture medium and adding 100-200ml / L of coconut water, 0.5-1.0 mg / L of 6-benayl aminopurine, 0.1-0.5 mg / L of naphthylacetic acid, 0.5-2.0 g / L of peptone and 0.5-1.0 g / L of activated carbon. According to the method, the seed germination rate can be effectively increased, the 60d seed germination rate reaches up to 85%, the pollution rate is reduced to 5% or below, 50.0 g / L inositol, 2.0 mg / L glycine and 2.0 mg / L nicotinic acid are added into a differentiation culture formula, the differentiation rate can be effectively increased, the leaf bud differentiation rate reaches up to 90%, meanwhile, rooting can be induced, the growth time of cymbidium faberi from seeds to seedlings is greatly shortened, a large number of high-quality seedlings can be obtained within a short time, and the method is suitable for large-scale popularization and application. Technical data are accumulated for cymbidium resource protection and new variety cultivation.

The invention discloses a biological filler for enhancing denitrification of an aerobic tank as well as preparation and application of the biological filler, the problem of weak activity of denitrifying bacteria is successfully solved by loading three layers of biological fillers, namely an inner layer-denitrifying bacteria, a middle layer-conducting layer and an outer layer-nitrifying bacteria, on the filler, and rapid formation of a biological membrane is realized. In addition, a metal conducting layer is additionally arranged in the middle to participate in electron transfer in the microbial denitrification process, and the biological membrane layers on the two sides achieve rapid formation of biological membranes so as to achieve conversion and removal of nitrogen. According to the method, the biological activity of the thalli can be kept, the rapid formation of a biological membrane is realized, and the separation of the thalli and refractory organic matters can be promoted, so that the toxic action on the thalli is reduced.

The invention discloses an 8-hydroxyquinoline derivative platinum complex as well as a synthesis method and application thereof. According to the invention, an 8-hydroxyquinoline derivative platinum complex is used as an active ligand and reacts with cis-Pt (DMSO) 2Cl2 to synthesize the 8-hydroxyquinoline derivative platinum complex. The 8-hydroxyquinoline derivative platinum complex has a good inhibition effect on human breast cancer cells MDA-MB-231, shows excellent in-vivo and in-vitro anti-tumor activity, has potential medicinal value, and is expected to be used for preparing various anti-tumor drugs.

The invention discloses a high-strength pipeline wide and thick steel plate based on strain design and a production method thereof. The steel plate comprises the following chemical components in percentage by weight: 0.030%-0.065% of C, 0.20%-0.45% of Si, 1.70%-1.85% of Mn, less than 0.030% of Nb, 0.060%-0.15% of V, 0.075%-0.170% of (Nb + V), 0.005%-0.025% of Ti, less than or equal to 2.0 of Ti / N, and Nilt. The steel comprises the following components in percentage by weight: 0.15% of Fe, less than 0.15% of Mo, 0.20%-0.50% of Cr, less than 0.15% of Cu, 0.40%-0.80% of (Ni + Mo + Cr + Cu), less than or equal to 0.025% of Zr, 0.005%-0.025% of Al, 0.005%-0.015% of N, 0.0015%-0.0040% of Ca, more than or equal to 1.6% of Ca / S, less than or equal to 0.010% of P, less than or equal to 0.002% of S, less than or equal to 0.00015% of H, less than or equal to 0.0018% of O and the balance of iron and inevitable impurities. The CEIIW of the high-strength pipeline wide and thick steel plate is controlled to be 0.42%-0.49%, the CEPcm of the high-strength pipeline wide and thick steel plate is controlled to be 0.17%-0.21%, the high-strength pipeline wide and thick steel plate with high strength, high toughness, strain resistance and good weldability is obtained through specific heating, rolling and cooling production processes, and the high-strength pipeline wide and thick steel plate has very wide application prospects.

The invention discloses a lactam ring compound and application thereof, and belongs to the technical field of chemical medicines. The lactam ring compound as shown in the formula I provided by the invention can be used as a PARP1 inhibitor, has the advantages of high activity and high selectivity, and also has excellent pharmacokinetic properties and safety. # imgabs0 #

The invention discloses a narrow-linewidth double-frequency laser generation method, and belongs to the technical field of microwave photons. Two paths of optical signals generated by two semiconductor lasers with different wavelengths are injected into the same optical microcavity, the two paths of optical signals enter a self-injection locking state in different modes of the optical microcavity, and the optical microcavity can output narrow-linewidth double-frequency laser. The invention further discloses a narrow-linewidth double-frequency laser generating device and a photo-production microwave method and device. Two double-frequency lasers with different frequencies are locked on one optical microcavity through an original double-self-injection locking technology, the problem of phase noise of a double-frequency light source is effectively solved while the linewidth of the input laser is narrowed, common-mode noise caused by mode difference of the two lasers in a locking state is eliminated, and the dual-frequency light source has the advantages of being simple in structure and convenient to operate. And the traditional servo locking technology is not needed, so that the complexity of the system is simplified.

The invention discloses a forestry waste treatment method for improving the carbon sequestration capacity of forests, and belongs to the technical field of forestry waste treatment.The forestry waste treatment method includes the steps that forestry waste is subjected to composting and then returned to forests, and the method specifically comprises the steps of material smashing, carbon nitrogen ratio adjusting, water content and pH adjusting, composting, decomposing and the like; an enzyme activity regulating agent is prepared and mixed into material residues for composting, the prepared enzyme activity regulating agent absorbs high-concentration glucose generated by decomposition in a high-temperature stage so as to reduce the inhibition effect of the high-concentration glucose on cellulase, meanwhile, the regulating agent further improves the activity of the cellulase, and by matching with control over conditions such as moisture and pH, the content of the cellulase is improved. According to the present invention, the efficient composting is ensured, the composting decomposition rate and the composting decomposition degree are improved, the fertilizer obtained through the composting can effectively improve the physical and chemical properties of the soil in the forest, can promote the forest growth, and can improve the forest stand quality and the carbon sequestration ability, and the forestry waste treatment method has important significance on the resource utilization of the forestry waste and the forest carbon sequestration and sink increase.

The invention discloses a method for effectively relieving soybean antigen protein Glycinin in fish feed and application of the method. The invention discloses application of N-acetylcysteine as a functional feed additive capable of relieving carp enteritis induced by soybean antigen protein Glycinin. The feed disclosed by the invention comprises a soybean antigen protein Glycinin and N-acetylcysteine (NAC). According to the present invention, 1.5-6.0 g / kg of NAC is added to a feed containing 80 g / kg of Glycinin, such that the fish growth, the feed utilization rate, the digestion function, the protein metabolism function, the immune function, the oxidation resistance and the intestinal morphology can be significantly improved, and the soybean antigen protein Glycinin-induced growth inhibition and the intestinal injury can be effectively relieved; the functional fish feed additive provided by the invention is relatively low in cost and easy to popularize, and is beneficial to development of novel green antibiotic-replacing additives, improvement of the utilization rate of soybean protein sources, reduction of feed cost and promotion of healthy culture of fishes.

The invention relates to the technical field of sewage treatment, and discloses a combined treatment method of acid wastewater. The combined treatment method of the acid wastewater comprises the following steps: introducing the acid wastewater generated in an industrial process into an electrochemical device, loading a nonmetallic mineral material on an anode of the electrochemical device, and neutralizing the acid wastewater and extracting heavy metals through electrochemical treatment; the solution subjected to electrochemical treatment enters a sedimentation tank, carbon dioxide in the air is captured and fixed, and then the treated solution meeting the environmental quality standard for surface water is directly discharged. The acid wastewater treatment method is simple, efficient and easy to operate, meanwhile, heavy metal recovery is achieved, non-metallic minerals which are easy to obtain and environmentally friendly are introduced into the anode of the electrochemical device, hydrogen ions released in the electrolysis process are consumed, inhibition of the hydrogen ions on heavy metal deposition is reduced, and the extraction rate of the heavy metal in the wastewater is increased. And the solution subjected to electrochemical treatment is used for capturing and fixing the carbon dioxide, so that the treatment liquid is directly discharged.

The invention discloses a high-flux microfluidic strain screening device, and relates to the technical field of microfluidics, the high-flux microfluidic strain screening device comprises a microdroplet generation unit and a microdroplet collection unit, the microdroplet generation unit comprises an inner water phase pipe, an oil phase pipe, an outer water phase pipe and a liquid outlet pipe which are coaxially arranged; the micro-droplet collecting unit comprises a collecting plate, a micro-droplet liquid inlet, a micro-droplet collecting cavity and a waste liquid discharging opening are formed in the collecting plate, a plurality of positioning grooves for capturing micro-droplets are formed in the bottom of the micro-droplet collecting cavity, and an extraction channel penetrating to the bottom surface of the collecting plate is formed in the bottom of each positioning groove; one end of the microdroplet liquid outlet of the liquid outlet pipe is inserted into the microdroplet liquid inlet; in order to solve the problems of low flux, easy cross contamination and false positive screening in single strain separation and culture in the prior art, the invention provides a high-flux microfluidic strain screening device capable of quickly separating, culturing and screening a single strain collected in an environment.

The invention relates to the field of biological medicine, and discloses application of a biphenyl cyclooctene lignan compound and a chemotherapy sensitizing drug. The biphenyl cyclooctene lignan compound can be used for preparing a chemotherapy sensitizing drug, and the chemotherapy sensitizing drug is an ovarian cancer chemotherapy sensitizing drug, and can improve the sensitivity of cells to paclitaxel and inhibit the activity, proliferation and migration of the cells. The biphenyl cyclooctene lignan compound is combined with paclitaxel, so that the cell activity of the ovarian cancer paclitaxel drug-resistant cell A2780 / Taxol can be remarkably reduced, and the cell survival rate is only 31.13%. The combination of the biphenyl cyclooctene lignan compound and paclitaxel can also be used for preparing chemotherapy sensitizing drugs.

The invention discloses an ultrasonic vibration cutting tool, and belongs to the technical field of ultrasonic vibration machining. The cutter assembly comprises a first clamping flange, a second clamping flange, a cutter and an ultrasonic vibrator, and the two clamping flanges and the cutter are fixedly connected and form an ultrasonic vibrator mounting part for accommodating the ultrasonic vibrator; a conducting layer and an insulating layer are arranged between the ultrasonic vibrator and the two clamping flanges, after the cutter is tightly fixed on the cutter holder by the fixing nut, the cutter is matched with the conducting layer to form an ultrasonic vibrator grounding end circuit, and the other side of the ultrasonic vibrator abuts against the power supply ejector pin; a cylindrical mounting part is arranged on the first clamping flange and provided with a conical matching hole matched with the conical mounting part of the tool apron, a plurality of Z-shaped elastic connecting sets are formed between the cylindrical mounting part and the conical matching hole, the design of through holes in special shapes has obvious buffering and vibration isolation effects, and the tool is divided into a mounting part and a vibration part during working. During assembly, the fixing nut is only in contact with the mounting part, so that the inhibition effect of mounting factors on the amplitude of the ultrasonic cutting knife is greatly weakened, and the cutting efficiency and quality are improved.

The invention provides application of a traditional Chinese medicine composition in preparation of medicines for preventing and / or treating influenza A and related diseases thereof. The traditional Chinese medicine composition comprises the following components or is prepared from the following raw material medicines in parts by weight: 20-40 parts of gypsum, 10-30 parts of wild buckwheat rhizome, 10-30 parts of herba houttuyniae, 3-15 parts of roasted herba ephedrae, 3-15 parts of fried semen armeniacae amarae, 3-15 parts of bulbus fritillariae cirrhosae, 5-25 parts of herba ardisiae japonicae, 3-15 parts of folium eriobotryae, 3-15 parts of fried fructus perillae and 3-15 parts of roasted radix glycyrrhizae. The traditional Chinese medicine composition disclosed by the invention has a relatively good inhibition effect on influenza A viruses, is low in toxicity and high in safety, also has a good anti-influenza A virus infection effect, and can provide a basis for clinically treating pulmonary infection caused by the influenza A viruses.

The invention belongs to the technical field of photocatalytic materials, and particularly relates to a visible light photocatalytic composite material and a preparation method thereof.The visible light photocatalytic composite material is prepared from, by weight, 10-50 g of magnetic nanometer cores, 20-80 g of TiO2 precursors, 20-80 g of stabilizers, 40-100 g of g-C3N4 precursors and 50-200 g of modifiers, and the visible light photocatalytic composite material is prepared on the basis of efficient photocatalytic performance and a magnetic separation function. According to the preparation method, the photo-induced electron-hole separation efficiency is improved through heterojunction, magnetic Fe3O4 and TiO2 / g-C3N4 are organically combined to play a role in degrading organic pollutants, and meanwhile, specific adsorption and reduction of heavy metal ions are realized through surface functional modification; the problems of narrow visible light response range, difficulty in catalyst recovery, poor heavy metal selective removal effect and the like in the prior art are solved.

The utility model discloses an intelligent liftable aeration system for a Carrousel oxidation ditch, and belongs to the technical field of sewage treatment. The system comprises an anaerobic zone, an anoxic zone and an aerobic zone which are sequentially connected along the flow direction of sewage, wherein a water inlet pipeline is arranged in the anaerobic zone; a water outlet and an aeration assembly are arranged in the aerobic zone, the aeration assembly comprises an air blower arranged beside the aerobic zone, an air conveying port of the air blower is connected with an air conveying pipe, the air conveying pipe is located above the pool surface and provided with a plurality of air outlets, the air outlets are all connected with detachable air conveying branch pipes, and air outlets of the air conveying branch pipes are connected with lifting type aeration rows; and the lifting type aeration rows are uniformly arranged at the pool bottom area of the aerobic area. According to the utility model, the control on the oxygen supply amount of each lifting type aeration row is realized, the oxygen demand of aerobic bacteria is met, the amount of dissolved oxygen flowing back to an anoxic zone is reduced, the DO in the reflux liquid and the inhibition influence on the denitrification process are reduced, and the hysteresis and corresponding adverse influence caused by the traditional adjustment on the air supply amount by the DO concentration are reduced.

The invention discloses a microorganism culture and storage device and a culture and storage method, and belongs to the technical field of microorganism culture. The microorganism culture and storage device comprises a box body, a clamping mechanism for clamping culture dishes is arranged in the box body, the clamping mechanism comprises a mounting plate, a plurality of clamping grooves for placing the culture dishes are formed in the mounting plate, and clamping structures are arranged on the side walls of the clamping grooves. A transmission structure for driving the clamping structure to act is arranged between the fixing plate and the mounting plate in the incubator; a stirring structure for stirring a culture solution and ventilating is arranged in the shell of the culture dish, and a power structure for driving the stirring structure to rotate is arranged in the box body. By adopting the microorganism culture and storage device and the culture and storage method, the problems that metabolic substances are difficult to detect and the culture dish is unstable to fix in the microorganism culture process by adopting the culture dish can be solved.

The invention relates to the technical field of PCR (Polymerase Chain Reaction) detection, and discloses a high-risk human papilloma virus DNA (Deoxyribose Nucleic Acid) multiplex PCR detection kit, which adopts a primer probe group and comprises a PCR mixed solution, a negative reference substance and a positive reference substance, wherein the PCR mixed solution comprises a primer probe group. Female first-stage urine is used as a detection sample, and compared with a cervix uteri sample, sampling is more convenient, the experience feeling is better, and the willingness of female cervical cancer screening can be provided; meanwhile, the content of cervical exfoliated cells in the urine is also increased by using the first-stage urine, and the clinical sensitivity of clinical HPV detection can be remarkably improved by matching with a provided cell enrichment method.

The invention provides a tetrazole alcohol compound as well as a preparation method and application thereof, and belongs to the field of medicines. The tetrazole alcohol compound provided by the invention has the characteristics that the structural formula is as shown in the formula I: # imgabs0 #, in the formula I, R1 represents H or F, R2 represents H or F, R3 is independently selected from any one of C1-C4 alkyl, C1-C4 alkoxy, halogen, halogenated alkane, halogenated alkoxy, cyano, a benzene ring and a substituted benzene ring, R4 represents H or CH3, X represents CH or N, and Y represents CH or N. The azaconazole compound has remarkable in-vitro and in-vivo antifungal activity on human pathogenic fungi such as candida albicans, cryptococcus neoformans and aspergillus fumigatus, and the in-vitro and in-vivo antifungal activity is higher than that of a traditional antifungal drug fluconazole, and meanwhile, the azaconazole compound has a low inhibition effect on human CYP450 enzyme, especially on human liver drug enzyme CYP3A4, and has a good application prospect. Therefore, the compound can be used for preparing antifungal drugs.

The invention discloses Chinese wolfberry fruit composite health wine and a preparation process thereof, and belongs to the field of fermented wine preparation processes, the Chinese wolfberry fruit composite health wine is prepared from the following raw materials according to the total solid-liquid ratio: 15-25 g / L of Chinese wolfberry fruit, 6-10 g / L of cistanche, 6-10 g / L of Chinese yam, 6-10 g / L of eucommia ulmoides leaf, 4-8 g / L of dogwood pulp, 4-8 g / L of astragalus membranaceus and 1-3 g / L of liquorice; the raw materials are added in a staged material supplementing mode for liquid fermentation, specifically, fructus lycii, Chinese yam, folium cortex eucommiae, fructus corni and liquorice are added in the ingredient adjusting stage, herba cistanche and part of radix astragali are added within 6 h after yeast fermentation, and the remaining radix astragali is added after fermentation. The obtained Chinese wolfberry fruit composite health-preserving wine is obvious in fermentation fragrance, mild in medicine flavor, high in functional component content and unique in taste.

The invention discloses a bile conversion product and a preparation method thereof, and belongs to the field of bioengineering technology. The preparation method comprises the following steps: mixing the culture fluid of 7α hydroxysteroid dehydrogenase and 7β hydroxysteroid dehydrogenase secreted and expressed by engineering bacteria with a buffer solution after adsorption, impurity removal, and ultrafiltration concentration, and adding the culture fluid to an ion exchange agar gel column to immobilize the enzyme after adjusting the pH, thereby obtaining an immobilized enzyme column; mixing the avian bile extract with NADP+, adjusting the pH, and then adding the mixture to the immobilized enzyme column for conversion, and obtaining the bile conversion product after the clear liquid is concentrated under reduced pressure and dried under vacuum. The invention uses an ion exchange agar gel column as a carrier for immobilizing hydroxysteroid dehydrogenase, which has good stability, high mechanical strength, and large loading capacity, and the enzyme molecules are not easy to fall off, and can react continuously and the reaction product can be separated from the enzyme in time, thereby reducing the occurrence of reverse reaction, thereby obtaining a bile conversion product with a higher ratio of TUDCA:TCDCA.

The invention discloses a domestication method and device for salt-tolerant activated sludge, and belongs to the technical field of microculture and sewage treatment devices. In order to solve the technical problems that in the prior art, domestication of salt-tolerant activated sludge is achieved in the mode that salinity is increased in a gradient mode, obtained sludge is poor in genetic adaptability and long in domestication period, the domestication method of the salt-tolerant activated sludge comprises the steps that fresh sludge with the sludge concentration MLSS being 5000-6000 mg / L and the MLSS / MLVSS being larger than or equal to 0.8 is put into a domestication device; the domestication device comprises an anaerobic-anoxic reaction zone and an aerobic reaction zone which are communicated with each other; the concentration of salt in the system is controlled to be 3-5%, when the CODcr removal rate is smaller than or equal to 30%, the CODcr concentration gradient is gradually increased at the gradient of 500-1000 mg / L in the modes of increasing nutrition addition, increasing the aeration rate of the aerobic reaction zone, returning the sludge in the aerobic reaction zone to the anaerobic-anoxic reaction zone, supplementing fresh sludge, discharging inactivated sludge and the like, and the obtained salt-tolerant activated sludge is good in heredity and high in salt tolerance. And the domestication period is short.

The invention discloses a kitchen waste biological treatment and emission reduction storage method and application thereof. By adding a compound lactic acid bacteria preparation, odor emission caused by rapid acidification and reproduction mildewing and corruption in the material storage process is achieved. Meanwhile, before the hermetia illucens is converted into the kitchen waste, zygosaccharomyces bayer with the acidophilic characteristic is added for secondary fermentation, organic acid (VFAs) and ammonia nitrogen in the material are converted into yeast protein, the inhibition effect of free organic acid on growth and reproduction of hermetia illucens larvae is reduced, inorganic ammonia nitrogen is converted into biological organic nitrogen (amino acid and the like), and the biological organic nitrogen is converted into biological organic nitrogen (amino acid and the like); organic carbon of the material is converted into soluble nutrients (SCOD) which are more easily absorbed by the hermetia illucens, so that the larvae of the hermetia illucens are promoted to quickly and efficiently convert the kitchen waste, and the volatilization of ammonia ions in the conversion process of the hermetia illucens is reduced. The related technology provided by the invention is beneficial to ammonia emission reduction and quality and efficiency improvement in the process of industrial breeding of hermetia illucens.

The invention discloses an intelligent treatment method for dredged sludge. The intelligent treatment method comprises the following steps: S1, preparing fermentation raw materials; s2, performing fermentation treatment on the fermentation raw material to obtain a first fermentation material and first fermentation gas; performing vacuum treatment on the first fermentation material to obtain a second fermentation material and second fermentation gas; collecting the first fermentation gas and the second fermentation gas, performing desulfurization and combustion treatment on the first fermentation gas and the second fermentation gas to obtain high-temperature steam, and mixing the high-temperature steam with the second fermentation material to obtain a mixed material; s3, repeating the step S2, and circularly treating the mixed material until the fermentation raw material is completely fermented; s4, performing dehydration treatment on the completely fermented fermentation raw materials to obtain treated dredged sludge and tail water; wherein the fermentation liquor in the fermentation raw materials in the first round is tap water, and the fermentation liquor in the fermentation raw materials except the fermentation raw materials in the first round is tail water. When the device is used for treating dredged sludge, secondary pollution is avoided, and the fermentation efficiency is high.

This invention belongs to the field of microbial technology, specifically relating to a strain of Acetobacter peroxide 672 and its applications. The Acetobacter peroxide 672 strain of this invention can enhance the antagonistic activity of Pichia pastoris against Rhizoctonia solani and also antagonizes Colloidal anthracnose, providing a multi-faceted solution for the biological control of crop diseases. Furthermore, the strain possesses the ability to produce indoleacetic acid, which can significantly promote the growth and development of grain crops such as wheat and corn, promote root expansion, enhance nutrient and water absorption, and thus effectively increase biomass. In addition, the strain can tolerate and degrade chemical pesticide components such as imidacloprid and carbendazim, alleviating soil pesticide residue pollution, and can effectively alleviate the inhibitory effects of low pH stress on crops, enhancing their stress resistance. Therefore, the Acetobacter peroxide 672 strain of this invention has significant application value in the biological control of crop diseases, crop growth promotion, soil pesticide residue remediation, and enhancing crop stress resistance.

The invention relates to the technical field of cutting fluid, in particular to cutting lubricating fluid as well as a preparation method and application thereof. The invention provides a special cutting lubricating liquid for finish machining of flutes on the inner wall of an aluminum alloy waveguide, the special cutting lubricating liquid comprises the following components in parts by weight: 89-91 parts of kerosene, 4-6 parts of No.40 engine oil, 0.8-1 part of rapeseed oil, 0.3-0.5 part of tung oil, 0.3-0.5 part of a flame retardant and 0.8-1 part of a penetrant, the composition comprises kerosene, engine oil, rapeseed oil and tung oil, and the flame retardant and the penetrant are supplemented. The lubricating fluid comprehensively solves the problems of built-up edges, oxidation corrosion and cutter wear in deep and narrow flute processing through complementation of advantages of all the components in permeation, lubrication, cooling and film-forming properties.

The present invention provides a nano drug for inducing ferroptosis, which is a nanoparticle formed by coordination self-assembly of an iron salt and a polyphenol drug, and a preparation method thereof comprises: dripping an organic solution containing an iron salt and a polyphenol drug into a liquid culture medium or a phosphate buffer solution to obtain a mixed solution; stirring the mixed solution to allow the iron salt and the polyphenol drug to self-assemble to obtain a nano drug. The nano drug provided by the present invention has a small size, good water solubility, and can be enriched in the tumor area, and can be used to prepare a drug for inducing ferroptosis of tumor cells. The present invention also provides a preparation method and application of the above-mentioned nano drug for inducing ferroptosis.

The present invention relates to an anti-transpiration agent for reducing plant transpiration and a preparation method thereof, which includes an agent A and an agent B, wherein the agent A is composed of a water-soluble chitosan solution, a metal organic framework MIL-125 (Ti) and a phosphate buffer, and the agent B is composed of glycerol, ferric chloride and water. In sunny weather, the agent A is first sprayed on the plant leaf surface using a sprayer, and 1.5 to 2 hours after the spraying is completed, the agent B is sprayed on the plant leaf surface using a sprayer, and after the leaf surface is dried, a layer of anti-transpiration agent is attached to the leaf surface. The anti-transpiration agent for reducing plant transpiration of the present invention is sprayed on the leaves of the plant, which can significantly reduce the plant transpiration, and has a significant inhibitory effect on the transpiration rate of the plant leaves. At the same time, the leaf surface is less damaged and is not prone to poisoning symptoms. The anti-transpiration effect is more lasting, and after a single use for 9 days, there is still a certain anti-transpiration effect. The anti-transpiration agent of the present invention has good stability after film formation and good resistance to rainwater impact.

The present invention provides an antifreeze polypeptide derived from bovine collagen, which can reduce the difference in solute concentration inside and outside the cell during the cooling process, thereby inhibiting the formation of ice crystals inside and outside the sperm cell, and further reducing ice crystal damage to cell membranes and organelles during deep cryopreservation and recovery, thereby improving the survival rate of sperm cells after deep cryopreservation and recovery. The frozen sperm has a higher in vitro fertilization cell development rate and fertility rate, and can reproduce rapidly. In addition, the semen freezing diluent provided by the present application does not contain any exogenous protein, which can effectively reduce exogenous protein interference and immunosuppression during in vitro fertilization, and further improve the fertilization rate and fertility rate of frozen semen.

The invention relates to the technical field of submerged arc furnaces, and discloses a large energy-saving direct-current submerged arc furnace which comprises a bottom plate and a fixing frame arranged on the bottom plate. According to the large energy-saving direct-current submerged arc furnace, the particle size of ore is controlled through extrusion and crushing, materials are automatically stricken by a strickling plate, a conical rod rotates and guides, the particle size is screened according to intervals, and ferromagnetic impurities are removed through a magnetic attraction belt; the electrode and furnace lining loss is reduced; inert gas is introduced into an airflow plate of a heating furnace to strengthen stirring of a molten pool and promote full contact of effective components and a fluxing agent, a full-direct-current framework is adopted to eliminate alternating loss, a double-inverse-star-shaped non-in-phase inverse parallel topology is matched, and mutual counteraction of current and a magnetic field is utilized, so that the material with the particle size exceeding the standard is obtained. Copper pipe hysteresis and eddy current loss are reduced, the operating temperature is controlled, the topological multi-pulse rectification optimizes the current waveform, the reactive power is reduced, and a high-capacity reactive power compensation device is omitted; and meanwhile, the length of the short net is shortened, the conductor section is optimized, an additional heat dissipation pipeline is not needed, and energy consumption and investment are reduced.