16results about How to "Avoid toxic effects" patented technology

The invention discloses a method for synergistically removing nitrate and degrading antibiotics through sulfur autotrophy-heterotrophy, which comprises the following steps: (1) taking an SBR (sequencing batch reactor), inoculating anoxic sludge of a sewage treatment plant, adding CH3NaS, Na2S2O3 and NaHCO3 into influent water containing nitrate, and domesticating the sludge; and (2) after domestication in the step (1) is completed, carrying out anoxic stirring, introducing nitrate-containing wastewater, adding a solution containing CH3NaS and antibiotics into the reactor, carrying out a stirring reaction, determining a first-order derivative of ORP, when the first-order derivative dORP / dt is less than or equal to r, repeating the steps of adding the solution containing CH3NaS and antibiotics, carrying out a stirring reaction, and determining the first-order derivative of ORP for many times, and when the last first-order derivative dORP / dt is less than or equal to r, stopping adding the solution containing CH3NaS and antibiotics. Carrying out anaerobic stirring, precipitating, draining and stopping to complete domestication of the sludge; and (3) introducing wastewater to be treated to remove nitrate and antibiotics. The method provided by the invention can realize sulfur autotrophy-heterotrophy synergistic efficient removal of nitrate and tolerate beta-lactam antibiotic stress.

The invention discloses a pesticide microcapsule and application thereof, and belongs to the technical field of pesticides. The pesticide microcapsule is prepared by the following method: adding pesticide active ingredients into ethyl acetate, then adding polylactic acid, and uniformly stirring to obtain an organic phase; the pesticide active ingredient is composed of a bifenthrin-clothianidin compound and piperine according to a mass ratio of 1: (1-3); dissolving polyvinyl alcohol in water to obtain a water phase; under an ice-water bath condition, dropwise adding the organic phase into the water phase, and simultaneously stirring to form an emulsion; and stirring, evaporating, centrifuging, washing and drying the emulsion to obtain the pesticide microcapsule. The bifenthrin, the clothianidin and the piperine are compounded to prepare the pesticide microcapsule, so that the pesticide resistance of pests due to the action of a single medicament is effectively avoided, the piperine not only directly has a toxic effect on the pests, but also can enhance the insecticidal effect of the bifenthrin and the clothianidin, and 1 + 1gt is realized; and 2, a synergistic effect is achieved.

The invention provides an arsenic hyperaccumulation double-gene recombinant vector and application of the arsenic hyperaccumulation double-gene recombinant vector in repairing an arsenic polluted environment, and belongs to the technical field of gene engineering. The arsenic hyperaccumulation double-gene recombinant vector takes a plant expression vector containing a pUbi promoter as a skeleton vector, and further comprises a PvACR3 gene and PvACR3, 1 gene and a prbcS promoter; wherein the pUbi promoter is used for promoting the expression of the PvACR3 gene; a prbcS promoter is used for starting the PvACR3; 1 gene expression. Aiming at the problem of rice death caused by high expression quantity of arsenic accumulation genes in transgenic rice in the prior art, through reasonable design of insertion genes and combination of promoters, toxicity of arsenic accumulation to the transgenic rice is avoided, and the arsenic removal quantity of the transgenic rice is greatly improved.

The invention belongs to the technical field of rubber products, and provides silicone rubber for a composite insulator, a preparation method of the silicone rubber and the insulator, and the preparation method comprises the following steps: S1, mixing methyl vinyl phenyl silicone rubber and glycidyl methacrylate grafted silicone rubber in parts by weight, adding fumed silica and modified magnesium hydroxide, and uniformly stirring to obtain a silicone rubber mixture; continuously mixing, adding silicone oil, triethanolamine and a vulcanizing agent, stirring and mixing, and standing to obtain a mixed rubber material; s2, the mixed rubber material is put into an open mill to be mixed, a vulcanizing agent is added, thin passing and sheet discharging are conducted, standing is conducted, and rubber sheets are obtained; s3, putting the rubber sheet into a mold for molding, and then carrying out vulcanization reaction to obtain the silicone rubber material. The silicone rubber material provided by the invention has excellent mechanical property, flame retardant property, anti-aging property and electrical insulation property. Meanwhile, the preparation process is simple, raw materials are easy to obtain, cost is low, and wide application prospects are achieved.

The invention provides a polyoxyalkylene ether macromonomer, a preparation method and application of the polyoxyalkylene ether macromonomer in preparation of a polycarboxylate superplasticizer, the polyoxyalkylene ether macromonomer is obtained by performing ring-opening polymerization reaction on an initiator and an alkylene oxide monomer under the action of a deprotonation reagent, and the initiator is allyl mercaptan or methyl and phenyl substituted allyl mercaptan. The polycarboxylate superplasticizer is obtained by free radical copolymerization reaction of an acid monomer and the polyoxyalkylene ether macromonomer under the action of an initiator and a reducing agent. Allyl sulfide is easy to generate uniform cracking of carbon-sulfur bonds in the polymerization process, polyoxyalkylene ether sulfydryl free radicals are generated, chain transfer is achieved, in the chain transfer process of the polyoxyalkylene ether macromonomer, a transferred chain still retains terminal double bonds and can participate in polymerization again, and the polyoxyalkylene ether macromonomer has a good polymerization effect. Therefore, polycarboxylic acid synthesized by using the polyoxyalkylene ether macromonomer has a certain branched topological structure, and cement paste dispersed by the polyoxyalkylene ether macromonomer has better workability.

The present invention discloses a high-silicon naphtha processing system and a processing technology. The high-silicon naphtha processing system of the present invention comprises a fixed bed reactor, a desiliconization reactor, a heat exchanger and a fractionation unit; the fixed bed reactor is composed of a gas phase reaction zone, a gas-liquid separation zone, a gas-liquid countercurrent zone, a gas-liquid contact zone and a liquid phase reaction zone from top to bottom. The high-silicon naphtha processing technology comprises: hydrogen first enters the gas-liquid contact zone at the bottom of the fixed bed reactor, the high-silicon naphtha and the olefin-rich raw material enter the gas-liquid separation zone from the top of the fixed bed reactor, the materials react in each reaction zone, the desiliconized product is mixed with the bottom effluent of the liquid phase reaction zone after heat exchange, and stripping and fractionation are performed to obtain qualified products. The present invention not only realizes the efficient removal of silicon in high-silicon raw materials, but also can simultaneously process conventional coking raw materials, obtain qualified chemical raw materials and automotive diesel products, and at the same time extend the operation cycle of the coking oil processing device.

According to the efficient and simple instantaneous transformation method for the tobacco protoplast provided by the invention, agrobacterium carrying a target vector is utilized to firstly transform the Bensi tobacco leaves, then the protoplast is obtained through an enzymolysis method, the operation is simple and easy, the consumed time is short, and the transformation efficiency is greatly improved; and a PEG reagent does not need to be used. The yield of the obtained nicotiana benthamiana protoplast is 16.92 + / -0.27 * 10 < 6 > / g FW, and the instantaneous conversion efficiency reaches 85.57% or above. Compared with the prior art, the method has the advantages that the step of PEG conversion is omitted, the toxic action of a PEG chemical reagent on the protoplast is avoided, and a plurality of unstable factors in the PEG-mediated protoplast conversion process are also avoided. In addition, the method is low in cost, convenient and fast, the obtained protoplast is good in quality, and the conversion efficiency is high.

The invention relates to the technical field of plant tissue culture, in particular to application of amphotericin B in inhibition of endophyte pollution of ancient cinnamomum camphora stem tissue culture. It is found that amphotericin B can effectively inhibit endophyte pollution in the ancient cinnamomum camphora stem tissue culture process, meanwhile, it is avoided that high-concentration antibiotics generate a toxic effect on stem induction, the stem induction endophyte pollution rate in the tissue culture process is effectively reduced and can be reduced to 6%, the stem induction rate can still reach 78%, and the tissue culture cost is reduced. The bottleneck problem of endophyte pollution in the ancient cinnamomum camphora stem tissue culture process is solved, and technical support is provided for efficient propagation and preservation of precious germplasm resources of ancient cinnamomum camphora.

The invention relates to the technical field of microorganisms, and provides acinetobacter, a fungicide, a plant growth promoting agent, a biological fertilizer and application, the acinetobacter is named as Acinetobacter sp.11.12.7.6, the acinetobacter is preserved in China General Microbiological Culture Collection Center on December 8, 2023, the preservation number is CGMCC No.29270, and the acinetobacter is named as Acinetobacter sp.11.12.7.6. The acinetobacter is named as Acinetobacter sp.11.12.7.6. The acinetobacter is named as Acinetobacter sp.11.12.7.6. The acinetobacter has the effects of degrading ursolic acid generated by asparagus, preventing and treating asparagus stem blight and promoting plant growth and nitrogen fixation.

The present application relates to the field of microbial technology and provides a kind of Acinetobacter, a bacterial agent, a plant growth promoter, a biological fertilizer and an application. The Acinetobacter is named as Acinetobacter sp.11.12.7.6. The strain has been deposited in the General Microbiological Center of China Microorganism Culture Collection Committee on December 8, 2023, with the deposit number CGMCC No.29270. The Acinetobacter has the functions of degrading ursolic acid produced by asparagus, preventing and treating asparagus stem blight, promoting plant growth and nitrogen fixation.

The invention provides a culture of aspergillus terreus in an iron-limited culture medium and application of the culture in organic pollutant treatment, and relates to the field of microorganisms and environmental remediation. According to the method, an iron-limited culture environment is adopted, aspergillus terreus is induced to secrete an iron carrier with metal chelating capacity, an iron source is captured, and therefore an efficient Fenton-like reaction system is constructed, generation of hydroxyl free radicals is promoted, and the method is suitable for in-situ green remediation of refractory organic pollutants.

The invention provides a method for obtaining an amphoteric strain by removing a symbiotic bacterium Ricktsia in Pingbelly, and belongs to the technical field of arthropod reproductive mode regulation, and the method comprises the following steps: continuously feeding Pingbelly with rifampicin for multiple generations so as to remove Ricktsia carried by Pingbelly and obtain a fertile amphoteric strain. According to the method, the antibiotic rifampicin can be used for stably removing the symbiotic bacteria Ricktsia in the parthenogenetic female Pingetsia to obtain a fertile amphoteric strain, so that a foundation is laid for further regulating and controlling an arthropod reproduction mode by using the Ricktsia and exploring the interaction of the symbiotic bacteria and a host; the method provides a practical path for studying changes of biology, behavioristics, physiology and the like of hosts before and after bacterium removal, and has good application value.

The invention discloses a fertilizer for eliminating continuous cropping obstacles of American ginseng soil as well as a preparation method and application of the fertilizer, and belongs to the technical field of anti-stress preparations and fertilizers. According to the invention, the mixed bacterial liquid is loaded in the pore structure of the porous carrier, and organic and inorganic fertilizers are combined to prepare the fertilizer capable of eliminating the continuous cropping obstacle of American ginseng soil. The obtained fertilizer can achieve the following effects: (1) the pH value of soil is increased, the problem that the pH value of the soil is reduced due to continuous cropping is solved, and the growth of American ginseng is promoted; and (2) the porous carrier can adsorb phenolic acid substances in root exudates of the American ginseng through physical and chemical effects, so that the phenolic acid substances are prevented from generating toxic effects on the American ginseng, the growth of the American ginseng is promoted, and continuous cropping obstacles are eliminated. And (3) improving the microbial community structure and composition, further promoting the growth of American ginseng, and increasing the yield of American ginseng.

The application belongs to the technical field of sporogon culture, and particularly relates to a culture method of sporogon of Brychus based on a liquid culture medium, which comprises the following steps: S1, preparing a Brychus sample with mature sporogon; S2, preparing a spore suspension, taking a mature sporangium of the Brychus and taking out spores, and dispersing the spores into distilled water to prepare a spore suspension; and S3, inoculation, inoculating the spore suspension into a culture bottle containing a liquid culture medium, and then culturing the culture bottle after being covered. The application customizes a special liquid culture medium formula according to the physiological characteristics and growth requirements of the sporogon of the Brychus, and matches highly adaptive culture environment parameters, and the two synergistically ensure the smooth culture of the sporogon of the Brychus from the two dimensions of nutrient supply and environment adaptation.

The utility model provides a kind of anti-bending breakage's front suspension instrument, belong to ophthalmology relevant treatment upper eyelid ptosis technical field, including anti-bending breakage suspension line, both ends of the anti-bending breakage suspension line are provided with metal guide needle.The utility model solves the risk of bending point fracture of the existing front suspension instrument when in use, suspension line is implanted into human body for a long time, is easy to cause damage to patient after fracture, reduces the safety of instrument use, and the difficulty of instrument production process is greater, may lead to the shedding of suspension line or the abrasion of suspension line by metal guide needle tail end even fracture in the process of instrument use, reduces the practicability of instrument problem.

The present invention provides a catalytic cracking catalyst and a preparation method thereof. The catalyst has excellent resistance to alkali nitrogen poisoning. The catalyst comprises the following components: 0.1 to 5 parts by weight of a nitrogen-capturing active component; 10 to 50 parts by weight of a cracking active component; 10 to 80 parts by weight of clay; and 10 to 30 parts by weight of a binder; wherein the nitrogen-capturing active component is an oxide of metal zirconium. The present invention also provides three methods for preparing the catalytic cracking catalyst. The present invention utilizes the nitrogen-capturing active component to selectively adsorb nitrogen-containing compounds in catalytic cracking feedstocks, thereby inhibiting the poisoning effect of nitrogen-containing compounds on ordinary molecular sieves used for hydrocarbon cracking. On the other hand, the catalyst of the present invention promotes cracking and condensation dehydrogenation reactions of nitrogen-containing compounds on the surface of the nitrogen-capturing active component, so that the nitrogen-containing compounds are removed in the form of coke, thereby preventing the nitrogen-containing compounds from entering the target product, thereby reducing the adverse effects of the nitrogen-containing compounds on the properties and subsequent processing of the target product.