122results about How to "Change stability" patented technology

Methods and compositions for rendering proteins directly responsive to an external signal utilizing modulators that themselves respond to the external signal and are associated with the proteins. In response to the external signal, the modulator alters physical properties of the specific protein molecule(s) with which it is associated, thereby altering the structural and functional properties thereof. The modulator may, for example, transfer applied energy to a protein, or to a portion of the protein, thereby changing the protein structure and function.

The invention relates to an on-line quality detection system of motion belt material, comprising a parallel image sensor group constituted by at least two high-resolution linear CCD, a set of image transmission and process systems composed of a push-in local area network constituted by at least two DSP and a lighting system suitable for motion belt material. A high-speed CCD signal digital multiple circuit, an automatic control circuit of CCD sampling frequency based on the motion belt material speed, a data communication interface circuit between the CCD and DSP are built, then the real-time acquisition of the motion belt material image is realized without an image acquisition card and at the same time the strong image processing function of TMS320C6416 is applied on the image processing for the quality detection the motion belt material thus the collected image does not deform. The system is especially suitable for on-line quality detection of the motion belt material such as plastic film, textile fabric, paper or the like.

The invention discloses a high pressure and low pressure bypass system. The high pressure and low pressure bypass system comprises a high pressure bypass system connected with a high pressure cylinder, a low pressure bypass system connected with an intermediate pressure cylinder and a low pressure cylinder, a circulation pipeline and a condenser. The high pressure bypass system comprises an overheating pipeline, a backheating pipeline and a high pressure bypass pipeline. The low pressure bypass system comprises a reheating pipeline and a reheating condensation pipeline. The circulation pipeline comprises a circulating water pipeline and a high pressure temperature reducing pipeline. The high pressure and low pressure bypass system has the advantages that the structure is reasonable, the service life is long, unit load adaptability is improved, and a unit can be suitable for frequent start and stop and rapid load rise and fall; under the working condition that a turbine is started or load shedding is conducted, the temperature and the pressure of live steam are reduced through the bypass system, and then the live steam is fed into a reheater, dry burning of the reheater is avoided, and therefore the reheater is protected; in the sudden shedding of part of or all of loads of the unit, a bypass is quickly opened, a working medium is recycled to the condenser, running stability of a boiler is changed, and motion of a safety valve is reduced and even avoided.

The invention relates to a numerical control curve-tooth bevel gear grinder, which comprises a lathe bed, and is characterized by also comprising an upright post, a grinding wheel main shaft box, a workpiece main shaft box, an electric turntable, a grinding wheel correcting mechanism and a numerical control system. The lathe bed in the horizontal direction is provided with linear guide rails vertical to each other, the upright post and a bed saddle are arranged on the linear guide rails respectively, and an upright post automatic moving mechanism is arranged between the bottom of the upright post and the lathe bed; one lateral surface of the upright post is provided with the linear guide rail and the grinding wheel main shaft box, and the same side of the upright posts close to the top is provided with a moving mechanism for driving the grinding wheel main shaft box to move; and the bed saddle is provided with the electric turntable which is provided with the workpiece main shaft box on which the grinding wheel correcting mechanism is arranged. The numerical control curve-tooth bevel gear grinder has the advantages that the grinder simplifies the prior mechanical transmission, shortens adjusting time of a machine tool, has compact and reasonable structure, accurate processing with high accuracy, high automation degree to remarkably improve processing efficiency, and has low manufacturing cost to relieve economic burden of enterprises.

The invention discloses a method for rapidly preparing large-particle-size silica sol, belongs to the field of inorganic application materials and in particular relates to an ion exchange method for rapidly preparing the large-particle-size silica sol. High-purity sodium silicate prepared by fumed silica is selected as a raw material, activated silica acid and silica mother solution are prepared by virtue of an ion exchange method, the pH value of the silica mother solution is regulated so as to compress a double electrode layer of silica sol particles, and the distance among the nanoparticles is further shortened so as to increase the silica particle size increase rate. Therefore, rapid formation of particle size of large-particle-size silica sol is promoted, narrow particle size distribution can be obtained, and the production efficiency and quality are greatly improved. According to the addition of a stabilizer and a polymerization inhibitor, the effects of preventing aggregation of silica sol and ending the reaction can be respectively achieved, and nanometer silica sol with uniform dispersion and controllable particle size is finally obtained. Compared with the traditional ion exchange method, the method disclosed by the invention has the advantages that the prepared silica sol is high in purity, the particle size distribution is narrow, and the production efficiency is doubled.

The invention provides a method for preparing polyhedral oligomeric silsesquioxanes containing titanium phenyl, which relates to a method for preparing phenyl polyhedral oligomeric silsesquioxanes containing titanium phenyl. The method solves the problem that coprecipitation side effects are easy to occur by the method of the prior art for preparing a silsesquioxane-titanium dioxide hybrid polymer. The method comprises the following steps: 1) dropwise adding water to a mixed liquid of A-phenyl-trimethoxy silane, absolute alcohol and acetic acid, and carrying out heating, backflow and ageing on the mixed liquid to obtain phenyl heptamertic cyclopentyl silsesquioxanes; 2) preparing titanium oxide sol by using tetrabutyl titanate; and 3) dripping the titanium oxide sol to the polyhedral oligomeric silsesquioxanes, making the mixed sol of the titanium oxide sol and the polyhedral oligomeric silsesquioxanes stand for 40-50 hours at 8-12 DEG C, and drying the obtained sol to obtain the polyhedral oligomeric silsesquioxanes containing titanium phenyl. The method has the advantages that the method does not have any side effects, the target products are pure, and the polymer is not mixed with precipitates of titanium dioxide and silsesquioxanes. The method can be used for producing reinforced and modified materials of resinous polymers.

The invention relates to an ethylene sulfate preparation method, which comprises: dissolving ethylene glycol in an aprotic organic solvent, adding an aprotic organic alkali, introducing sulfuryl fluoride, stirring while reacting, filtering after the reaction is completed, and carrying out evaporating concentrating and drying on the filtrate to obtain ethylene sulfate. According to the invention, the ethylene sulfate prepared by the method has extremely high purity of more than 99.9%, low moisture content of less than or equal to 20 ppm and low acid value of less than or equal to 10 ppm, and effectively changes the influence of the moisture and the acid value in an electrolytic solution on the cycle performance and the storage stability of a battery.

One involves a gas delayed recoil method. This method is applied to: 1. Weapons with any caliber, chamber pressure and muzzle velocity can be launched with low recoil or recoilless. 2. Gas turbine engines, ramjet engines and rocket engines. As a combustion chamber subsystem, the working medium is changed from a constant pressure combustion mode to a constant volume combustion mode with higher thermal cycle efficiency. A piston is assembled in the barrel of the weapon (that is, the gun barrel or gun barrel). When the gunpowder gas in the barrel burns and expands to do work and launch the projectile, the piston is simultaneously pushed to move along the axis; when the "bore pressure-time curve" of the barrel Certainly, the special structural design of the piston allows the piston to move to the position of the exhaust hole opened on the barrel at the moment when the projectile exits the chamber, so that part of the gunpowder gas is ejected forward with the projectile and part of it is released. The gunpowder gas is ejected backward through this exhaust hole to form a recoil force to counteract the recoil momentum of the barrel.

The invention relates to a deep city sludge dehydration curing method which needs a curing conditioning agent and comprises the following steps: 1) adding water into municipal sludge, and performing uniform stirring and mixing so as to obtain sludge slurry; wherein the mass percentage of the water is 8-10% of the dry weight of the sludge; 2) adding quick lime and coal ash into the sludge slurry prepared in the step 1), performing stirring, adding an iron salt, and performing stirring so as to obtain paste slurry; and 3) performing press filtering on the paste slurry prepared in the step 2) byusing a plate frame filter press till the water content is 50% or less, so as to obtain mud cakes of which the water content is 50% or less. The method not only is low in cost, good in sludge dehydration effect, capable of forming hard plastic mud cakes after dehydration and good in curing effect, but also takes effects of sterilization and deodorization on sludge.

The invention discloses a water purification system and a water purification method for an inclined tube floating sedimentation tank. The bottom of a flocculating chamber is communicated with the bottom of an air flotation contact chamber, the bottom of the air flotation contact chamber is provided with a water inlet of a sedimentation water distribution area, a gate plate is arranged at the water inlet, an inclined tube sedimentation area is positioned above the sedimentation water distribution area, an air flotation separation chamber is positioned above the inclined tube sedimentation area, and the inclined tube sedimentation area is communicated with the sedimentation water distribution area and the air flotation separation chamber. The water purification method comprises the following steps of: (1) adjusting the state of each tube orifice of the water purification system; (2) mixing raw water and a coagulant; (3) performing flocculation; (4) performing air flotation contact; and (5) performing air flotation separation and sedimentation to obtain purified water. When an air flotation and sedimentation combined process and a single sedimentation process are operated, the converting operation of the two processes is simple. By selecting different operating units for water of a yellow water introduction reservoir according to the water quality, the water temperature and the water quantity changed with season and climate, the effect of double results with half work can be achieved.

The invention provides a coal-mining method of a loose coal seam. The method comprises the following steps: firstly, setting one water injection point every two wetted radiuses r at a part, which is ahead of 120m of a coal mining working surface along the coal seam in a rail drift and a conveying drift; statically injecting water into a coal body at each water injection point, wherein the water injection point is propelled and moves forwards in sequence along the coal mining working surface; meanwhile, injecting high-pressure water into the coal body of the working surface on a wall along a coal seam inclining direction until water automatically leaks out; then starting to cut the coal; in a coal cutting process, spreading a metal net above a hydraulic bracket, wherein a whole top plate is separated by the metal net so as to carry out whole stoping work under the metal net and guarantee that the crushed top plate does not flow into a stoping space; after cutting the coal, rapidly pushing a front canopy of the hydraulic bracket, wherein the travel L of the front canopy is greater than the cutting depth of a coal-mining machine; and pushing a scraping plate conveyor and the hydraulic bracket so as to shorten the exposure time of the top plate as much as possible. The coal-mining method of the loose coal seam, provided by the invention, is safe and efficient, and the coal body can be prevented from wall caving.

The invention discloses spray drying type fruit and vegetable powder and a preparing method thereof. The spray drying type fruit and vegetable powder is prepared by concentrated fruit and vegetable juice, maltodextrin, modified starch and water through a spray drying method; and has the characteristics of developmental nutrition and good taste. The invention also discloses the preparing method of the spray drying type fruit and vegetable powder. The method can overcome the defects existing in the prior art, the extraction rate of the fruit and vegetable powder can be effectively improved, the shape of a product is improved, and the nutrition of the fruit and vegetable cannot be damaged.

A peptide probe that generates fluorescence signals rapidly upon recognition of various Aβ aggregates without significant perturbation of samples. The present peptide probes display an increase in fluorescence signals upon coincubation with Aβ oligomers, but neither monomeric/dimeric species nor fibrils. The detection can occur within an hour or two without any additional sample preparation and incubation steps.

The invention discloses a method for preparing enramycin premix. The method comprises the steps that the temperature of enramycin fermentation liquor is firstly increased to 70-75 DEG C, then complex antioxidants of which the mass accounts for 0.5-1.0% of that of the enramycin fermentation liquor and filter aid of which the mass accounts for 0-12% of that of the enramycin fermentation liquor are added, and the mixture is stirred fully and evenly; frame filter and flash drying are performed on the evenly stirred mixture, auxiliary materials are added in the mixture for dilution, and then the enramycin premix is prepared. The method is simple, easy to operate and low in cost, and compared with finished enramycin premix which is not preprocessed, the enramycin premix has the advantages that the degradation degree is obviously weakened and the stability is obviously improved.

The invention provides an iodine-containing disinfectant used for the livestock and poultry breeding industry. The disinfectant comprises 2-20%W/V of a single-chain quaternary ammonium salt, 0.5-5%W/V of a quaternary ammonium salt synergist, 0.1-2%W/V of iodine, and the balance other components. The disinfectant is an iodine and quaternary ammonium salt contained disinfectant having the advantages of good safety, good disinfection effect, and strong stability, and can realize the purposes comprising disinfection effect improvement and stability enhancement of the iodine complex disinfectant. So the iodine-containing disinfectant can be used for disinfecting livestock and poultry culturing farm spaces, equipment in livestock and poultry farms, and the body surfaces of animals.

Thirty substantially pure and biologically active peptides are disclosed. Nucleic acids that have sequences coding for the biologically active peptides and pharmaceutical formulations produced therefrom are also disclosed. Methods for altering the biological activity of the peptides are disclosed.