41results about How to "Constant pH" patented technology

The invention relates to a reagent for processing trace whole blood and an application thereof. The reagent comprises the following components: a buffer solution, an osmotic pressure retaining agent, a protective agent, an anticoagulant and a preservative. By adopting the reagent, a trace whole blood sample can be diluted by optional times (2-1000 times) and treated to obtain dilution of serum or plasma without damaging the sample and causing erythrocyte hematolysis.

Provided are a method of culturing Agaricus bisporus mycelium, the method comprising culturing Agaricus bisporus mycelium or spores thereof in a liquid medium comprising sugar cane extract, and a medium for culturing the Agaricus bisporus mycelium.

The invention provides a pantoprazole sodium freeze-dried medicinal composition for injection, comprising the following components by weight: 1 part of pantoprazole sodium and 0.01-0.1 part of sodium citrate. The invention also provides a preparation method of the freeze-dried medicinal composition. The pantoprazole sodium freeze-dried medicinal composition for injection is used for treating peptic ulcer bleeding, acute gastric mucosal injury caused by non-steroidal anti-inflammatory drugs and ulcer hemorrhoea in a stress state, as well as regurgitation of gastric juice and aspiration pneumonia of patients who are subjected to general anesthesia or a major operation and are weak and in coma.

The invention relates to a method and a device for water production by electrolysis with compensation for water velocity, and is intended to provide people with fine drinking water and cosmetic washing water. The method comprises the following steps: detecting the water velocity of water entering an electrolytic cell; then, carrying out the comparison operation with the set value, and carrying out the pulse width modulation (PWM) according to the results of the comparison operation; and adjusting the electrolytic current of the electrolytic cell at any time according to the generated PWM signals to cause the electrolytic current thereof to be adjusted along with the change in the water velocity. Therefore, the invention can solve the technical problem that the pH value of the electrolyzed water varies with the water velocity in the prior art of water production, technically, the pH value remains almost constant within a certain range; meanwhile, the electrodes are automatically switched from one another each time the device is used by a user, scale can be shifted towards an opposite direction and washed off along with the water flow when the device is used next time, thereby achieving the purpose of automatic cleaning; and the invention has the advantage of wide application.

The invention provides a preparation method for an aluminum-doped zinc oxide (AZO) nano array. The method is performed as follows: precisely controlling the concentration of chemical reaction solution by continuously injecting growing sources and doping sources at a constant speed to controllably prepare an aluminum-doped zinc oxide (AZO) array with high carrier concentration; compounding the aluminum-doped zinc oxide (AZO) array and a nickel oxide material to obtain a capacitor electrode material with high electricity capacity. The capacitor electrode material with high electricity capacity is attained in such a way that an aluminum-doped zinc oxide (AZO) array with high conductivity prepared by a continuous flow injecting method and a nickelnanosheet material with poor conductivity but high electricity capacity are combined. In comparison to a conventional hydrothermal method, the carrier concentration obtained from the preparation method provided in the invention increases three orders of magnitude. In the method, an aluminum-doped zinc oxide (AZO) material with high carrier concentration and a nickel oxide with poor conductivity are combined such that the advantages of the two materials are brought into full play and the electricity capacity of a capacitor is substantially increased. Beyond that, the continuous flow injecting and doping method provides a new idea for controllable precise doping. The method is simple in operation, cost-effective and enjoys great application prospects.

The invention relates to feed capable of improving the growth rate of beef cattle and a preparation method thereof. The feed is characterized by comprising the following raw materials in parts by weight: 256-320 parts of corn, 50-80 parts of bean meal, 30-40 parts of wheat bran, 180-200 parts of DDGS, 145-200 parts of corn fiber feed, 135-205 parts of rice bran meal, 5-10 parts of puffed urea, 20-30 parts of bentonite, 8-15 parts of baking soda, 15-25 parts of molasses, 5-8 parts of sodium sulfate, 5-7 parts of magnesium oxide, 5-10 parts of table salt, 10-13 parts of stone powder, 1-3 parts of yeast, 0.8-2 parts of bacillus subtilis, 10-15 parts of plant ash extract and 10-15 parts of premix. The feed capable of improving the growth rate of beef cattle obviously improves the palatability,feed intake and digestibility of the feed, improves the weight gain rate of the beef cattle, reduces the feed-gain ratio, improves the breeding economic benefit and also reduces the morbidity rate ofincidental diseases in the fattening process of the beef cattle.

The invention discloses a real-time chemical corrosion device and method for impact testing, and relates to the technical field of corrosion test equipment. A water tank in the corrosion device is symmetrically provided with two accommodating cavities for placing an incident rod and a transmission rod respectively required for an impact test. After the sample reaches the designed corrosion time, the water tank is entirely moved to a Hopkinson rod system platform, the incident rod and the transmission rod are inserted into the corresponding accommodating cavities to make close contact with a sleeve and abut the sample, and then an impact test is carried out. The invention discloses the real-time chemical corrosion device and method for impact testing, simulates the corrosion of a sample inan aqueous solution environment, and can realize seamless connection between corrosion treatment and dynamic impact, ensure that the sample is always placed in the corrosion solution during the movement and impact test process to reduce the reaction volatilization of the aqueous solution and the air in the pores of the sample, and maintain the fluidity and concentration of the corrosion solution to improve the accuracy of the test results and fully meet the engineering reality.

A PVC (polyvinyl chloride) paste resin used for preparing a medical glove comprises the following raw materials according to parts by weight: 100 parts of vinyl chloride monomer, 98 parts of desalted water, 1.72-2.19 parts of compound emulsifier, 0.02-0.04 part of initiator and 0.07-0.12 part of pH modifier. The production method comprises the steps as follows: adding the compound emulsifier, desalted water and a pH modifier into a premixing tank for stirring, adding the initiator and a vinyl chloride monomer, starting a diffusion pump for external circulation of the materials, turning the materials in a polymerizing pot through a homogenizer for polymerization reaction, discharging the materials in the polymerizing pot to a discharging tank, recycling the reacted vinyl chloride monomer and drying the latex obtained through reaction to obtain the PVC paste resin. The product produced by the method can ensure the particle size and distribution of primary particles, the diffusion of the vinyl chloride monomer is more stable, and the heat stability of the product is good.

The invention discloses a method for producing an oil-field drag reducing agent. The drag reducing agent comprises the following raw material components in parts by weight: a main agent: 30-50 parts of polyethylene oxide, 30-80 parts of acrylamide, 100-250 parts of a sulfonate, 35-95 parts of modified acrylic acid, 200-280 parts of polyisobutylene, 100-160 parts of an organosilicone, 5-15 parts ofpolyimide, 50-150 parts of a sodium secondary alkylsulfonate, 10-90 parts of an allyl resin, 20-50 parts of an amino resin, and 300-600 parts of distilled water; and an auxiliary agent: 20-45 parts of a pressure-sensitive adhesive, 10-25 parts of a curing agent, 25-35 parts of a monoalkyl phosphate, 18-35 parts of polyvinyl acetate, 60-100 parts of isopropyl alcohol, 75-150 parts of benzyl alcohol, and 60-120 parts of a polyether polyol. The invention relates to the technical field of drag reducing agents. According to the method for producing the oil-field drag reducing agent, the oil-fielddrag reducing agent can adapt to a relatively low temperature after the production is completed, the production environment of the drag reducing agent in the high-latitude is effectively maintained, and the drag reducing agent can maintain the same experimental effects outdoors as indoor tests by the combined setting of the organosilicone, the allyl resin and the amino resin when the drag reducingagent is at work.

The invention discloses a device for applying an oscillatory constant fluid shearing force to anchorage-dependent cells, which comprises a microliter injector, connecting tubes, a small fluid chamber, an oscillatory fluid loading device and a single chip, wherein the microliter injector is connected with a fluid inlet and a fluid outlet at one end of the small fluid chamber through one connecting tube; the other connecting tube is connected with the fluid inlet and the fluid outlet at the other end of the small fluid chamber and is inserted into a fluid storage bottle; and when the oscillatory fluid loading device works, the injection volume and injection speed of the injector can be uniformly and accurately controlled, so that the flow rate and oscillation frequency of reciprocating fluid in the oscillatory fluid loading device are controlled. The device of the invention has a simple structure, is convenient to operate, can form a sealed environment and also can prevent the pollution of bacteria and adjust the oscillation frequency and the magnitude of the shearing force in experimental research.

The invention discloses a primary isolation and culture method for human umbilical vein endothelium, after collecting postoperative umbilical cord, collagenase is added to separate and extract umbilical vein endothelial cells to prepare a single cell suspension, the P0 generation cells are cultured, and the P0 generation cells are cultured to the P2 generation cells by using a complete medium based on the M199 medium; P2 cells are digested with trypsin, inoculated into a T75 flask, and cultured in a complete medium based on the M199 medium, and when the cell fusion degree is 80 to 90%, P3 cells of human umbilical vein endothelial cells after expansion and culture are obtained. The method can ensure the cell viability while extending the umbilical cord storage time to 6 hours.

The invention provides a method for producing 1,3-propylene glycol by using microbial fermentation. The method takes glycerol as a raw material and uses microbial fermentation to produce 1,3-propylene glycol, wherein the used microbe strain is one of Klebsiella pneumoniae, Klebsiella acid-producing bacillus or clostridia butyricum, and liquid ammonia is used for adjusting the pH value of a fermentation liquid in the fermentation process. By using the method, the pH value in the fermentation process can be well controlled, and the by-product obtained by the reaction has wide application.

The invention discloses a scanning-type micro-arc oxidation treatment device and method. The treatment device comprises a fixing head, a liquid supply pipe and a liquid extracting pipe, wherein the fixing head comprises a fixing head body and an insulating layer arranged on the outer wall of the fixing head body; the fixing head body is made of a conductive material; an electrolyte passage is processed in the fixing head body; a clamping part is arranged outside the fixing head; the fixing head body is connected with a negative electrode of a power supply through a first guide wire; one end ofthe liquid supply pipe is fixed to an outlet end of the electrolyte passage of the fixing head; an inner passage of the liquid supply pipe coincides with the electrolyte passage; the other end of theliquid supply pipe is a free end; the liquid extracting pipe is fixed on the outer side of the liquid supply pipe in a sleeving manner; the internal diameter of the liquid extracting pipe is larger than the external diameter of the liquid supply pipe; and one end of the liquid extracting pipe is closed, and the other end of the liquid extracting pipe extends outwards relative to the free end of the liquid supply pipe by a set distance to form a liquid return area. The treatment device can realize the micro-arc oxidation treatment on a complicated area on the surface of a workpiece in a simplescanning manner, and is suitable for the micro-arc oxidation treatment on a local area of a large-size workpiece.

The invention provides a preparation method of a Ni-Co composite oxide. The preparation method comprises the following steps of taking a mother liquid obtained through separation as a raw material after an Ni-Co-Al carbonate precursor is synthesized; adding an appropriate amount of cobalt salt according to a certain proportion; taking ammonium oxalate as a precipitant; controlling conditions such as a certain temperature and a pH value to prepare spherical Ni-Co oxalate precipitate; and carrying out calcination on the Ni-Co oxalate in a high-temperature condition to obtain the Ni-Co composite oxide with uniform granularity and high sphericity. The preparation process is simple and controllable and is low in cost, raw material waste caused by direct discharge of the mother liquid is prevented, and meanwhile, the mother liquid after solid-liquid separation of the Ni-Co oxalate precipitate still can be recycled. The invention also provides the Ni-Co composite oxide prepared according to the above preparation method. The Ni-Co composite oxide is relatively high in purity, is of a regular spherical shape, and is relatively high in sphericity and uniform in granularity, the average grain is 15-20 micrometers, the bulk density is greater than 1.5g/cm<3>, the tap density is greater than 1.8g/cm<3>, and the Ni-Co composite oxide is suitably used as a precursor of a battery material in industrial production.

The invention relates to an improved process for oxidizing a primary amidoalcohol to the corresponding amidocarboxylic acid in high yield.

The invention relates to the field of sewage treatment devices for digital product production workshops and discloses a domestic sewage treatment device for a digital product workshop. The domestic sewage treatment device comprises a filter and an anaerobic reaction tank, wherein a liquid inlet pipe, which is communicated with the inner part of the filter, is arranged at one side of the filter; the filter is connected with the anaerobic reaction tank through a first-grade communication pipe; a buffering solution injection mechanism, which is communicated with the inner part of the anaerobic reaction tank, is arranged at the top of the anaerobic reaction tank; the buffering solution injection mechanism is of a cylinder mechanism and an opening is formed in the top of the buffering solutioninjection mechanism; the buffering solution injection mechanism is internally provided with a sliding device; the sliding device comprises an upper sliding plate and a lower sliding plate; a spring for connecting the upper sliding plate and the lower sliding plate is arranged between the upper sliding plate and the lower sliding plate; a flow discharging opening, which is located between the uppersliding plate and the lower sliding plate, is formed in one side, located in the anaerobic reaction tank, of the buffering solution injection mechanism; a second-grade communication pipe, which is communicated with the inner part of the anaerobic reaction tank, is arranged at one side, far away from the filter, of the anaerobic reaction tank; one end, opposite to the anaerobic reaction tank, of the second-grade communication pipe is connected with a sewage discharging tank. The domestic sewage treatment device for the digital product workshop can be used for treating domestic sewage of the digital product workshop.

The invention discloses a method for collecting live bee venom. The method comprises the following steps: S1, preparing a gel plate with the pH value of 4.5-7.0, wherein a hydrophobic elastic membraneis arranged on the gel surface in the gel plate; S2, using live bees to sting the gel plate, leaving bee needles in the gel through the hydrophobic elastic membrane, and continuously injecting bee venom; and S3, after the bee venom is injected, taking down the hydrophobic elastic membrane and the bee needles on the hydrophobic elastic membrane, and sealing and storing the gel plate. The inventionfurther discloses a method and device for detecting the weight of the live bee venom. Compared with the prior art, the method has the advantages that the live bee venom which is obtained by stingingof the bees is sealed by using the gel, on one hand, the method can be used for detecting the weight of the bee venom, on the other hand, the method can be directly used as a corresponding bee venom product processing raw material together with the gel, and the weight of the bee venom in the gel is detected by a weight detection method during use. The hydrophobic elastic membrane is arranged on the gel surface, so that the live bee needles can be actively left in the gel plate and the bee venom can be continuously injected into the gel plate, the method is convenient to operate, and the collection of the bee venom is complete.

The invention provides a buffer solution for liquid-based cell tableting. The buffer solution is composed of sodium chloride, potassium chloride, distilled water, potassium dihydrogen phosphate and sodium hydroxide. The buffer solution reduces a use cost, effectively keeps the pH of a reaction system in a liquid-based cytology experiment stable, maintains the osmotic pressure and ion concentrationclose to the human body pH (isotonic) and adjusts the pH value without affecting the liquid-based cytological reaction so that the reaction system of the liquid-based cytology experiment is used under optimal conditions. The buffer solution is easy to promote, has strong specificity and saves the sample preparation time.