42results about How to "Avoid residual contamination" patented technology

The invention discloses a super rice strengthening and harm control cultivation method based on prevention and control of diseases, insects, lodging and pollution and aims to solve the problem that traditional rice cultivation methods easily cause diseases, insects, lodging and pollution. By harm control of cultivation environments, reducing disease and insect sources, harm control of seeds, timely sowing, cultivating to strengthen seedlings, reasonable close planting, filed management, effectively preventing and controlling diseases and insects, effective lodging prevention and the like, scientific management of the whole super rice cultivation process is achieved. Cultivation environmental conditions and technology favorable for normal growth of super rice and unfavorable for disease and insect generation are researched and created according to super rice cultivation features and generation features of diseases, insects, lodging and pollution, super rice growth conditions are improved effectively, and high quality and high yield of super rice are guaranteed. Tests show that an average of 53.2-59.6kg of high-quality rice is increased in each 667m<2> of super rice cultivated by the method, production value is increased by 138-155yuan, and evident economical, social and ecological benefits are achieved.

The invention discloses a wine-making preparation method adopting litchi fermentation. The method comprises the following steps: adopting pollution-free excellent quality litchi pulp to make fruit juice concentrate by means of a low-temperature ice-crystal method or a membrane concentration method, and blending the fruit juice concentrate with high dry wine; adding highly concentrated fruit juice frozen by the low-temperature ice-crystal method or the membrane concentration method into the mixture to keep the typical aroma of litchi fruit wine; adopting yeast strain, lactic acid strain and acetic acid strain to carry out multi-strain coordinated fermentation and adjusting the fermentation conditions; accelerating fermentation and conversion by fruit sugar and glucose cooled after high-temperature acid conversion of sucrose to improve the quality of fermented wine liquid; making use of ultra low temperature cryoprecipitation and triple filtration sterilization to solve the problem of deposition of products during storage and transportation; and adopting non-thermal sterilization filtration and concentration membrane technology to avoid the influence on fruit wine quality caused by thermal sterilization. The wine-making preparation method can obtain a natural litchi fermented wine product with palateful quality.

The present invention provides a bi-spore mushroom preservative, which is characterized in that the preservative comprises the methyl cellulose 8 to 12 g / L, the calcium chloride 0.6 to 1.0 g / L, the ascorbic acid 0.3 to 0.5 g / L, the sorbic acid 0.4 to 0.6 g / L, and the rest of the distilled water. After the preservative is immersed into the bi-spore mushroom, a layer of preservative is coated on the surface of the mushroom; in the air drying or natural drying process, the different molecules of the preservative are interacting with each other to form a uniform and transparent tri-dimensional structural semipermeable membrane, which can close the air holes on the surface of the mushroom so as to form a closed environment having the strict permeation; which can effectively prevent the oxygen entering into the interior of the mushroom, slowing down the outward diffusion of the carbon dioxide caused by the respiration of the mushroom so as to form a space with less oxygen and more carbon dioxide between the semipermeable membrane and the surface of the mushroom. The space can effectively prevent the biological respiration of the mushroom, slow down the consumption of the nutrients, effectively reduce the infringe of the foreign microorganism and reduce the evaporation of the water inside the mushroom during the storage period, thereby maintaining the hardness and the color of the mushroom and enabling the preservation period of the mushroom to exceed ten days.

The invention discloses natural-color fuzzy bamboo pulp with high bacteriostatic activity. The natural-color fuzzy bamboo pulp is 25-30%ISO (International Standardization Organization) in whiteness degree, is 0.25-0.35kPa m<2>/g in bursting strength, is 17-21cm<3>/g in dry filling power, is 6-6.5s in water absorption time, is 8.9-9.8g/g in water absorption capacity, is 0.86-3.79mm in average fiber length and is 0.009-0.022mm in average fiber width. A preparation method of the natural-color fuzzy bamboo pulp comprises the steps of pulping raw materials, cooking, washing, modifying and drying, wherein the washing step comprises coarse selection by a vibrating screen, black liquid extraction by a vacuum pulp washer, fine selection by a pressure screen, dedusting by a residue removal and pulp washing by a vacuum pulp washing machine. The natural-color fuzzy bamboo pulp has long fiber length, high flexibility and good water-absorbing ability and water-retaining property, has soft and fluffy texture and strong antibacterial property, can keep the 100% natural color of the bamboo fiber and can remarkably improve the quality of the down-stream products; and the preparation method has the characteristics of simplicity in operation, convenience in production, low cost and environment protection.

The invention discloses a smear cleaning method of a smear dyeing machine. The method comprises the step of wiping the smear, wherein a wiping device with adsorbing material is used for wiping a smear so as to clean the surface of the smear in the step of wiping the smear. Furthermore, the invention further provides a smear wiping device of the smear dyeing machine, and the wiping device is used for wiping the smear through the adsorbing material so as to clean the surface of the smear. The adsorbing material and the smear surface are in contact friction in wiping mode so as to wipe and adsorb the residue such as liquid spot on the smear surface, the smear is cleaned, the residual pollution on the smear surface is avoided, and a cleaning effect is good.

The invention discloses a preparation method of unbleached neosinocalamus affinis paper pulp, and belongs to the technical field of pulping and papermaking. The whiteness of paper pulp prepared from neosinocalamus affinis is 25%-40% ISO, the tensile index is larger than or equal to 8 Nm/g, the folding strength is 15-140 times, the fracture length is 6-8 km, the ash content is smaller than or equal to 1.2%, the breaking length is 150-600 mN, and the beating degree is 16-22-degree SR. The preparation method of the neosinocalamus affinis paper pulp comprises the following steps of raw material repulping, steaming, deflaking, pulp grinding, screening and washing. The neosinocalamus affinis paper pulp can be used for preparing household paper. The paper pulp preparation method has the advantages of being high in yield, easy to operate, convenient to produce, low in cost and environmentally friendly, and 100% of the natural color of the neosinocalamus affinis is kept.

The invention relates to cleaning equipment, in particular to medical instrument disinfecting and cleaning equipment for an obstetrical department. A technical problem to be solved is to provide the medical instrument disinfecting and cleaning equipment for the obstetrical department which can be automatically operated to improve cleaning efficiency, is simple and convenient to operate, saves manpower, optimizes cleaning effect and prevents pollution. According to the technical scheme, the medical instrument disinfecting and cleaning equipment for the obstetrical department comprises a shell and a motor, a moving assembly, a plurality of nozzles and a placing plate, the motor is arranged on the shell; the shell is provided with the moving assembly, and the moving assembly is connected with the motor; the nozzles are uniformly arranged on the moving assembly at intervals; and the placing plate is arranged on the shell in a sliding manner. According to the medical instrument disinfecting and cleaning equipment for the obstetrical department, people hold a closing assembly to open, medical instruments needing to be cleaned are placed on the placing plate, after the closing assembly is closed, the motor is started, the moving assembly is driven to reciprocate front and back, the nozzles on the moving assembly continuously flush the medical instruments, and effects of being easy and convenient to operate and saving manpower are achieved.

The invention discloses a preparation method of a self-colored bamboo fiber filter tip. The method comprises the first step of disintegrating raw materials, that is, disintegrating the bamboo fiber raw materials into sheets through a dry method, the second step of digesting, that is, mixing the sheets and digesting liquor evenly and then digesting the mixture to obtain high-hardness bamboo pulp with a potassium permanganate value ranging from 26 to 38, the third step of washing, that is, washing and screening the high-hardness bamboo pulp through a pressure screen and a vacuum washing and starching machine to obtain clean bamboo pulp with the concentration ranging from 3% to 8%, the fourth step of manufacturing paper with the pulp, that is, manufacturing thin paper sheets with the quantification of 25-40 g/cm3 with the clean bamboo pulp on a paper machine, the fifth step of dividing the thin paper sheets into rolls, that is, slitting the thin paper sheets into the paper rolls with the width ranging from 20 cm to 28 cm, and the sixth step of preparing filter sticks, that is, feeding the paper rolls into a horn mouth of a filter stick forming machine and machining the paper rolls into the circular filter sticks with the diameter ranging from 7.5 mm to 8.0 mm. The preparation method has the advantages that the raw materials are convenient to get, the preparation process is simple, harm to operators is small, the cost is low, and the environment is protected.

A method for the detection of copy number variations (CNVs) that combines similar sequences with melting curve analysis. The method consists of the following steps: 1) screening similar endogenous reference sequences or synthetic similar exogenous reference sequences in the entire genome according to the target sequence; 2) aligning the target sequence and the reference sequence and designing common amplification primers; 3) amplifying the target sequence and the reference sequence in a same reaction tube using a pair of common primers; and 4) analyzing the PCR product by melting curve analysis. When CNVs exist, the melting curve profiles of abnormal cases can be distinguished from those of unaffected samples using this method, thus attaining the object of detection. The method can be applied to dosage-variant genes and aneuploidy. The method is applicable to screening large populations, prenatal samples, mosaicism and cell-free fetal DNA in maternal plasma.

This invention discloses a method for preparing leaf fertilizer of poly (ammonium borate). The method comprises: (1) heating 60 kg water in the reaction kettle to 60 deg.C, and adding 50 kg boric acid and 50 kg ammonia under stirring until no air bubbles; (2) evaporating and concentrating the solution in an electric evaporator at less than or equal to 100 deg.C to 50%, filtering the supernatant, cooling to normal temperature, and crystallizing; (3) dehydrating the crystal, and drying in a drier at 100-105 deg.C for 8 h to obtain the leaf fertilizer of poly(ammonium borate). The leaf fertilizer of poly (ammonium borate) has such advantages as high boron content, easy absorption, and low crystallinity.

The invention discloses a spectrophotometer for batch detection, and a detection method thereof, and belongs to the field of detection equipment. The spectrophotometer comprises light path systems, wherein the plurality of light path systems which are arranged in a straight line are respectively provided with a conveying belt and a bench, a plurality of cuvettes are arranged on the conveying beltand the bench at equal intervals by taking the light path system as a symmetry axis, a liquid injection station and a plurality of detection stations are arranged above the conveying belt, a dumping station, a cleaning station, a drying station and a preparation station are arranged above the conveying belt, a liquid injector is arranged above the liquid injection station, and a liquid collectingdisc, a cleaner and a dryer are arranged below the dumping station, the cleaning station and the drying station respectively. According to the invention, the touch frequency of the cuvette can be reduced or eliminated, the accuracy of the wavelength of monochromatic light can be improved, the residual components of detection liquid on the cuvette can be reduced, the detection speed can be increased, the detection cost can be reduced, and the accuracy of the detection result can be improved.

A method for disinfecting a microtome cryostat (1) comprises a defrosting phase (11), provision (13) of a vaporous disinfection agent (2) which acts upon the closed cryostat chamber (3) and a period of time (14) during which said disinfection agent (2) acts, and having an associated device for carrying out the method. According to the invention, fast and effective disinfection and rapid restarting of a microtome cryostat (1) is possible with secure drying, the temperature difference (ΔT₁, ΔT₂) being produced after the period of time (14) in the cryostat chamber (3) whereupon the precipitated disinfection agent (2) is removed (18) to a cold area.

In the inkjet printing method according to the invention, ink is ejected at a temperature lower than or equal to 20° C., advantageously ranging between −20° C. and 20° C. The corresponding device comprises a temperature regulation system selected from among: a system for cooling the ink reservoir; a system for cooling the nozzles, advantageously with an in situ Peltier effect; a climatic chamber, advantageously at controlled temperature and humidity, intended to receive the printing device or the nozzles only.

The invention discloses a concentration device for production of simvastatin. The device includes a concentration tank, the outer wall at the bottom of the concentration tank is sleeved with a heating jacket, one side top of the concentration tank is connected to a feed pipe through a flange, one side bottom of the concentration tank is connected to an electronic liquid level meter by a flange, one side of the inner wall at the bottom of the concentration tank is connected to an electronic thermometer through a bolt, the bottom of the concentration tank is connected to a concentrated liquid electromagnetic valve through a flange, the outlet of the concentrated liquid electromagnetic valve is connected to a concentrated liquid transfer pump through a pipeline, and the top of the concentration tank is connected to a gas-liquid separator through a pipeline. According to the invention, both the concentration tank and the heating jacket are coated with a thermal insulation layer, at the same time the mixed liquid returned by a liquid return pump is heated by a heater, and then enters the concentration tank, so that the concentration device provided by the invention has reduced energy consumption, at the same time residual contamination phenomenon can be avoided in the concentration process of simvastatin, and the interests of enterprises can be improved.

The invention provides a method of planting pinellia ternata. The method comprises the steps of selecting seeds, applying fertilizer, conducting ploughing and bedding, sowing, watering, harvesting, and the like, and detailed description is made on how to select seeds, the fertilization time, the fertilizer amount, how to conduct plouging, the sowing time, the sowing amount, how to sow, the watering quantity and the like. The method of planting pinellia ternata is simple in operation process, through proper moisturizing and tillage, adequate base fertilizer is applied, organic fertilizer is taken as the main fertilizer and supplemented by inorganic fertilizer, and water and fertilizer are strictly controlled; during the growth period of pinellia ternata, it is not necessary to additionally apply fertilizer or apply insect prevention agents, and the pollution problem caused by pesticide residues in the process of planting pinellia ternata can be effectively solved.

The invention relates to a preparation method of an extinction soft-touch anti-fingerprint packaging material. The preparation method comprises the following steps: (1) mixing deionized water and isopropanol to prepare a diluent; (2) adding a certain amount of the diluent into waterborne polyurethane emulsion, fully and uniformly mixing, then adding a certain amount of a self-extinction waterbornepolyurethane resin, and uniformly stirring at room temperature to obtain a mixed solution I; (3) adding nano silicon oxide into the mixed solution obtained in the step (2), and fully and uniformly stirring to obtain a mixed solution II; (4) sequentially adding a surface leveling agent, a wetting agent and a slipping aid into the mixed solution II, and uniformly stirring to obtain a macromolecularwater-based coating solution; and (5) carrying out printing and coating processing on the surface of a high-transparency plastic material by using the macromolecular water-based coating solution prepared in the step (4), and then drying the coated material to prepare the soft-touch packaging material capable of eliminating the surface gloss of the material, improving the wear-resistant effect ofthe material and preventing touch fingerprint residues.

The invention provides a two-dimensional material, a two-dimensional material alloy and a two-dimensional material heterojunction preparation method, and belongs to the technical field of two-dimensional material preparation. A metal film or a metal oxide film is prepared on a silicon wafer through a thermal evaporation coating method to serve as a precursor film, the silicon wafer plated with the precursor film and a substrate are placed in an evaporation boat in a face-to-face mode, the precursor film is vulcanized through a chemical vapor deposition method, and the two-dimensional transition metal chalcogenide grows on the substrate. The two-dimensional material with controllable thickness and size can be obtained by changing the thickness of the precursor film and the face-to-face distance between the silicon wafer and the substrate. The preparation method provided by the invention is universally suitable for growth of two-dimensional materials including two-dimensional transition metal selenium compounds and two-dimensional transition metal tellurium compounds, can be used for preparation of two-dimensional material alloys and heterostructure materials, and is simple in preparation process, high in repeatability and suitable for industrial production. The controllability and the stability of the two-dimensional material in the growth process can be effectively improved.