103results about How to "Convenient dosage" patented technology

The invention provides ultra-high-performance abrasion-resistant high manganese steel and the production method thereof. The chemical compositions of the steel are that: carbon of 1.00 to 1.50 percent; manganese of 10.5 to 20.0 percent; silicon of 0.30 to 0.80 percent; chromium of 1.3 to 2.8 percent; sulfur of less than or equal to 0.040 percent; phosphorus of less than or equal to 0.070 percent; titanium of 0.06 to 0.20 percent; vanadium of 0.10 to 0.40 percent; boron of 0.002 to 0.010 percent; magnesium of 0.06 to 0.3 percent; rhenium of 0.08 to 0.4 percent; nitrogen of 0.05 to 0.2 percent; the remainder is iron. The production method is that: when the molten steel temperature reaches between 1500 and 1550 DEG C, the nitrogen and the calcium are added within 5 minutes after the molten steel is reduced, the aluminum is inserted and the vanadium (2 to 5 kg / t) and the titanium (4 to 10 kg / t) are added within 10 minutes before steel tapping, the rare earth magnesium (2 to 6 kg / t) is added into a tank when one-third steel is tapped, the rare earth silicon (1 to 4 kg / t) is added into the tank when one-second steel is tapped, the boron (0.1 to 0.3 kg / t) is added into the tank when two-third steel is tapped, the casting temperature of the molten steel is controlled between 1430 and 1460 DEG C. The invention adopts new alloying process, improves the abrasion- resistant performance and the comprehensive mechanical performance of the high manganese steel.

A method for controlling iron scale structures of hot-rolled steel bars by stepped cooling belongs to the technical field of steel rolling. Compact iron scale structures are obtained through optimization of a rolling and cooling process, so that a problem that steel bars produced by a post-rolling forceful through-water process are fast in corrosion rate and serious in corrosion degree in atmosphere is solved, and a goal that rust is relieved within a period of time is achieved. By adopting a stepped cooling process and the method for controlling the iron scale structures, provided by the invention, a traditional through-water cooling process can be replaced, so that mechanical property of an HRB400 (hot-rolled ribbed bar)-grade steel bar with phi 20 to 25 mm of a typical specification meets requirements of various technical indexes of GB 1499.2-2007; meanwhile, when being delivered to a cooling bed, each of all hot-rolled high-strength steel bars produced by adopting the stepped cooling process does not have a surface red Fe2O3 rust layer; shown by SEM (scanning electron microscope) analysis, iron scale is 10 to 30 [mu]m thick; after staying for one month in the open air, corrosion area of a sample is reduced by 50 percent in comparison with that of a steel bar produced by a traditional forceful through-water process.

The invention belongs to the technical field of lithium ion batteries, and specifically relates to a high-energy density lithium ion battery and electrolyte thereof. According to the high-energy density lithium ion battery and the electrolyte thereof, additive A, additive B, additive C and additive D are added in the electrolyte; the additive A is a negative electrode film formation additive for guaranteeing circulating performance, the additive B is the additive for improving high temperature performance, the additive C is modification additive of solid electrolyte membrane, and the additiveD is the additive for restraining electrolyte decomposition. Compared with the existing technology, for the electrolyte provided by the invention, by combined utilization of four types of additive A+B+C+D, a high-energy-density battery system can be guaranteed to have long circulation performance under premise of relatively lower electrolyte retention capacity in a limited space range and have excellent high temperature and low temperature performance at the same time.

The present invention provides modified heavy calcium carbonate for a fire retardation electric cable material. The modified heavy calcium carbonate is prepared from the following raw material components, by weight: 95-100 parts of calcium carbonate, 1-2 parts of octylphenol polyoxyethylene ether, 0.2-0.3 part of peregal O, 1-1.5 parts of dioctyl maleate, 0.2-0.4 part of zinc stearate, 0.1-0.2 part of magnesium oxide, 0.1-0.3 part of polyethylene wax, 0.1-0.4 part of an ultraviolet absorber UV-P, 1-2 parts of chitosan, 1-1.5 parts of polyphosphoric acid, and 2-3 parts of methyltriethoxysilane. The preparation method comprises: drying calcium carbonate, adding other raw materials according to the ratio, completely mixing in a high speed stirrer, and carrying out drying and grinding to obtain the finished product. The obtained modified calcium carbonate has characteristics of good dispersity and good ultraviolet resistance, and can be used for fire retardation electric cable materials so as to reduce cost and improve various processing performances of the electric cable material.

The present invention provides modified heavy calcium carbonate for a fire retardation electric cable material. The modified heavy calcium carbonate is prepared from the following raw material components, by weight: 90-100 parts of heavy calcium carbonate, 0.2-0.5 part of butyl naphthalene sulfonate, 0.5-0.8 part of sodium alcohol ether sulphate, 1-2 parts of epoxidized triglyceride, 0.1-0.2 part of stearic acid, 0.1-0.2 part of barium stearate, 0.2-0.3 part of dimethicone. 1-2 parts of carboxymethyl cellulose, 0.6-0.8 part of alumina, 1-3 parts of triphenyl phosphate, and 1-2 parts of distearoyl isopropoxy aluminate. The preparation method comprises: drying calcium carbonate, adding other raw materials according to the ratio, completely mixing in a high speed stirrer, and carrying out drying and grinding to obtain the finished product. The obtained modified calcium carbonate has characteristics of good dispersity and good fire retardation, and can be used for fire retardation electric cable materials so as to reduce cost and improve various physical properties of the electric cable material.

The invention provides a preparation method of a carbon / carbon nanotube coated lithium iron phosphate composite material by in situ synthesis, and relates to the technical field of battery materials. The preparation method provided by the invention comprises the steps of weighing raw materials of a lithium source, iron powder, a phosphate and a carbon source; first performing ball-milling on the iron powder and the phosphate and adding hydrogen peroxide; and then adding the lithium source and the carbon source to obtain a slurry, drying and sintering under the protection of reducing / inert gas to obtain the composite material. According to the preparation method provided by the invention, the carbon / carbon nanotube coated lithium iron phosphate composite material is prepared by employing an in-situ synthesis method, so the heat treatment time is short; the composite material has relatively high carbon coating rate, stable electrochemical property and relatively good consistency, the cycle performance and the rate performance are greatly improved, the whole preparation process is simple, and the preparation method has the advantages of safety, high efficiency, low cost and environmental protection, etc.

The invention discloses a hot metal pretreatment desilicication / dephosphorization agent. The hot metal pretreatment desilicication / dephosphorization agent is formed by mixing ferric red mud and lime particles according to the mass ratio of 1:(0.2-0.3). The content of TFe in the ferric red mud is 40-50 wt%, and the particle size of the ferric red mud is 0.088-0.5 mm. The particle size of the desilicication / dephosphorization agent is smaller than or equal to 3 mm, and the content of the desilicication / dephosphorization agent with the particle size of 1-3 mm is smaller than or equal to 5 wt%. The invention further discloses an application method of the hot metal pretreatment desilicication / dephosphorization agent. The method comprises the following steps that whether desilicication operation and dephosphorization operation are carried out independently or at the same time is determined according to the steelmaking smelting steel ball requirements and hot metal in-station conditions. When the ferric red mud is used as the desilicication / dephosphorization agent for hot metal pretreatment, furnace slag foaming can be avoided, furnace slag is prevented from overflowing out of a hot metal furnace, and the desilicication and dephosphorization effect is good.

The invention discloses a lactobacillus rhamnosus JYLR-005 as well as a hypoglycemic product and application thereof. The lactobacillus rhamnosus JYLR-005 is preserved in China General MicrobiologicalCulture Collection Center (CGMCC for short) with the preservation number of CGMCC No. 16103. The preserved strain, i.e., the lactobacillus rhamnosus JYLR-005, is prepared into a product for oral administration. The product mainly achieves blood glucose reduction of hyperglycemic population, avoids uncomfortable symptoms caused by drugs to the body, and reduces the recurrent risk of hyperglycemia.The strain is high in gastrointestinal survival and intestinal colonization capability, and can influence generation of various short-chain fatty acids in intestinal tracts to inhibit the activity ofalpha-amylase.

The invention relates to a pig feed for improving the appetite. The pig feed comprises the following components in parts by weight: 38-50 parts of corn starch residue, 6-15 parts of corn gluten meal, 5-10 parts of corn flour, 12-20 parts of jackfruit peel, 3-8 parts of soybean molasses, 4-6 parts of scale powder, 5-9 parts of spina date seeds, 0.01-0.06 part of azedarach, 0.2-0.5 part of apocynum venetum root, 0.02-0.05 part of lotus leaves, 0.3-0.7 part of fructus chebulae, 0.3-0.7 part of semen sesami nigrum, 0.1-0.3 part of rhodiola rosea, 0.2-0.6 part of mangnolia officinalis, 0.6-1 part of acacia flowers, 0.2-0.5 part of flowers of poplar, 0.4-0.7 part of wild chrysanthemum flowers, 0.1-0.5 part of motherwort, 0.6-0.8 part of pollen typhae, 0.7-0.9 part of common fenugreek seeds, 0.5-1 part of Chinese prickly ash, 0.4-0.7 part of rose flowers, 0.05-0.1 part of pawpaw, 0.07-0.1 part of elecampane, 0.06-0.1 part of burdock seeds, 0.06-0.1 part of glossy privet fruits, 0.3-0.5 part of illicium verum and 0.08-0.12 part of dandelion. Compared with the prior art, the pig feed disclosed by the invention is suitable for a demand of the taste of a pig, and is capable of stimulating the great appetite of the pig, promoting the feed intake of the pig, and effectively promoting the rapid growth of the pig; the pig fed with the pig feed has the good meat quality, is thin, healthy, free of chemical residues and relatively low in cost.

A Chinese medicine for treating the gynecologic inflammation is prepared from 7 Chinese-medicinal materials including spatholobus stem, green chiretta, cherokee rose-hip root, pilose asiabell root, etc through extracting, chromatography, eluting with alcohol, collecting eluting liquid, concentrating, drying and pulverizing.

The invention relates to a preparation method of a dry gas hydrogen production preconversion catalyst. The method includes: taking heavy magnesium oxide and aluminum hydroxide as raw materials, mixing them to conduct ball milling, performing calcination at 1100-1300DEG C to prepare an MgAl2O4 spinel carrier; in a water bath, neutralizing a prepared mixed solution of Ni(NO3)2, M(NO3)x and La(NO3)2, and an Na2CO3 saturated solution, and adding the obtained solution into a reactor dropwisely, keeping the terminal pH value of the reaction solution at 6.5-7, subjecting an obtained precipitate filter cake to drying, roasting and ball milling mixing so as to obtain a semi-finished catalyst product; mixing the semi-finished product with a lubricant and deionized water and carrying out tabletting molding, thus obtaining the finished catalyst product. In M(NO3)x, the M is one or more of Zr, Y, Ag, Co, Cu, Zn and K. The catalyst prepared by the method is used for low temperature preconversion of refinery dry gas, liquefied gas, and oil field gas. The low temperature reduction performance of the catalyst is improved, so that the catalyst has better low-temperature activity and high stability.

The invention relates to a Chinese medicinal capsules for treating abnormal menstruation, which comprises six kinds of Chinese herbs including motherwort, root of herbaceous peony, Chinese angelica root, notopterygium root, Bupleurum root and banksia rose.

Disclosed is an emulsible granule containing spirodiclofen composition and a preparation method thereof. The emulsible granule is composed of components of, by weight, 1-60% of active components, 5-30% of wetting dispersants, 2-15% of solvents, 5-40% of adsorbents, 0-10% of binders and the balance carriers. The active components and liquid auxiliary components in the formula are evenly mixed, and the mixture is absorbed to the carriers; or the active components, the solvents and the liquid auxiliary components are evenly mixed and then mixed with other solid components, an airflow pulverizer is used for smashing the mixture so that granularity of 98% of the mixture reaches 45 mu m, and then the smashed mixture is subjected to kneading and granulation to prepare the emulsible granule. The emulsible granule is reasonable in the components, obvious in mite killing effects instead of simple adding of activity of the components, low in drug use cost, long in lasting period, safe in using, simple in preparation method, safe in storage and transportation, convenient to apply and environment-friendly and is an ideal variety of miticide.

The invention discloses a thread added cigarette holder capable of reducing harmfulness of cigarettes and a production process of the thread added cigarette holder. The thread added composite cigarette holder is composed of a conventional acetic acid fiber cigarette holder A and a thread added acetic acid fiber cigarette holder B, wherein cotton threads are wrapped in the thread added acetic acid fiber cigarette holders B and infused with carbon nano tube solutions, and the weight of added carbon nano tubes in each of the thread added acetic acid fiber cigarette holders B is between 1mg and 10mg. The thread added cigarette holder capable of reducing harmfulness of the cigarettes and the production process have the advantages that the problem that indoor environments are polluted when the carbon nano tubes are added to the acetic acid fiber cigarette holders is effectively solved; by means of the control of the number of added threads, the added amount of the nano tubes in the cigarette holders can be conveniently and quantitatively adjusted; the production process is simple, capable of being combined with cigarette holder forming processes and applicable to mass production; harmful substances of polycyclic aromatic hydrocarbon, phenol and the like in cigarette smoke can be further reduced on the basis that cigarette tar is effectively reduced; and the number of the added threads and the positions of the threads in filter sticks can be controlled so that patterns with certain shapes can be structured on end surfaces of the filter sticks, and the cigarette holder is provided with anti-fake functions.

The invention discloses a recarburization nitrogen control production method of an intermediate-carbon high-alloy steel. The recarburization nitrogen control production method comprises the steps of molten iron desulfuration, converter smelting, LF refining treatment and plate blank continuous casting. The intermediate-carbon high-alloy steel comprises the components of 0.21-0.24% of C and less than or equal to 40ppm of N, and the adding quantity of an alloy is greater than or equal to 30 kg per ton of steel. Through rigid control in the various steps, the adding time and the reasonable matching ratio of a carburant in the converter tapping process are optimized, the carbon line usage of the LF procedure is lowered significantly, and the content of finished N is successfully controlled below 40 ppm. On the condition of not adding new procedures and equipment, the technical problems of recarburization nitrogen control are solved on the premise of lowering the cost.

The invention discloses an alkyd prepolymer as well as a preparation method and application of the alkyd prepolymer. The invention discloses the alkyd prepolymer prepared from raw materials includingdicarboxyl sulfonate and small-molecular diol by an esterification reaction, and the alkyd prepolymer comprises compounds with three structural formulae. Meanwhile, the invention discloses a specificpreparation method of the alkyd prepolymer and an application of the alkyd prepolymer. The invention provides the alkyd prepolymer which has an anionic sulfonic group and a nonionic hydrophilic groupand is used for preparing waterborne polyurethane. The water-soluble raw material can be used for preparing hydroxyl type waterborne polyurethane resin, a waterborne polyurethane curing agent and a waterborne sealed polyurethane curing agent, and a product can have good water dispersibility, water solubility and storage stability by only small addition amount.

The invention discloses an auxiliary agent for a broad spectrum pesticide of (Bacillus thuringiensis) Bt20, which relates to an auxiliary agent for the broad spectrum pesticide. The auxiliary agent solves the problems of easy deactivation of effective constituents and poor suspension degree existing in the prior Bt20 biopesticide under the irradiation of ultraviolet light. The auxiliary agent for the broad spectrum pesticide of the (Bacillus thuringiensis) Bt20 consists of dodecyl sodium sulfate, sodium lignosulphonate, saponin, urea, propanetriol, sodium benzoate, and sodium carboxymethyl cellulose. The auxiliary agent for the broad spectrum pesticide of the (Bacillus thuringiensis) Bt20 is added into a Bt20 biopesticide; the auxiliary agent has small adding amount and low cost, and ensures that effective constituents of the biopesticide are difficult to deactivate under the irradiation of the ultraviolet light and the lasting period in field is prolonged by more than 40 percent; and the biopesticide has good suspension degree, is difficult to precipitate, and prolongs the time of no precipitation during the placement by more than 10 percent.

The application discloses an on-line analysis method for real-time monitoring of the dose of a radiotherapy patient, comprising the following steps: step 1, a first set of detectors on a head of a connected radiotherapy machine collect the beaming dose data of the radiotherapy machine during each radiotherapy treatment in real time, and transmits the data to a microcontroller in real time, and then the microcontroller transmits the data to a special database in a memory for storage; step two, through a second set of detectors arranged on a human body surface, the real-time radiation dose actually received by the human body surface is sent to the microcontroller through a network, and then passed to the special database in the memory via the microcontroller; and step three, by calling the two sets of data in the special database, the microcontroller uses a comparative analysis module for real-time comparative analysis and calculates the dose error, and through continuous iteration of historical data in the special database, the model is optimized once the error is calculated, so that a recommended dose calculated the next time is more optimized.

The invention discloses a preparation method and application of a magnetic biomass charcoal material (MPC). The preparation method comprises the following steps: dissolving raw materials including corn stigma, FeCl3.6H2O, anhydrous sodium acetate and polyethylene glycol in ethylene glycol, carrying out uniform mixing, and performing a reaction at 190 DEG C for 12-24 hours in a hydrothermal reaction synthesis kettle with a volume of 50 mL; and carrying out cleaning and drying, performing high temperature carbonization with potassium hydroxide for 2 hours under the protection of nitrogen, and carrying out cleaning and drying to obtain the magnetic biomass charcoal material (MPC). The MPC is used as an adsorbent to extract malachite green in a water body, and an analysis method for determining malachite green in water by using magnetic solid-phase extraction / ultra-high performance liquid chromatography based on MPC is established. The analysis method shows good linearity (wherein r is greater than 0.99) within a range of 0.02-2 [mu]g / L, the limit of detection (LOD) is 0.005 [mu]g / L, and the limit of quantification (LOQ) is 0.016 [mu]g / L. The analysis method can be used for sensitive detection of trace malachite green in water.

The invention discloses a method for detecting amino acid content in calcium zinc gluconate oral solution. According to the detection method, pre-column derivatization-reversed-phase high-performanceliquid chromatography is adopted, and 2,4-dinitrofluorobenzene is taken as a derivatization reagent. The detection method comprises the following steps: (1) preparing a separation degree stock solution containing lysine hydrochloride and other impurity amino acids; (2) determining a corresponding relation between the dose of the derivatization reagent and the amino acid content in the separation degree stock solution; (3) preparing a test stock solution by utilizing calcium zinc gluconate oral solution, and carrying out derivation reaction, wherein the addition amount of the derivatization reagent is determined according to the corresponding relation determined in the step (2) and the amino acid content in the test stock solution; and (4) detecting by utilizing a reversed-phase high-performance liquid chromatograph. According to the method for detecting amino acid content in calcium zinc gluconate oral solution disclosed by the invention, the addition amount of the derivatization reagent is optimized, the pH value of a mobile phase is optimized, the detection process is excellent in repeatability, and the method is high in sensitivity and stable and reliable in appearance time.

The invention discloses a biological color enhancing agent which is prepared from 60-80 parts of Phaffia rhodozyma spray dry powder, 8-12 parts of Phaffia rhodozyma freeze-dried powder, 8-12 parts of a lactic acid bacteria fermentation product, 4-8 parts of antimicrobial peptide, 2-4 parts of mountain flour and 0.5-1.5 parts of glutamine. The invention further discloses a preparation method of the biological color enhancing agent and application of the biological color enhancing agent to aquatic animal breeding. According to the biological color enhancing agent, Phaffia rhodozyma serves as the effective ingredient, the nutritious value is rich, the content of protein is high, and the biological color enhancing agent is rich in multiple types of microelements and coenzyme, further rich in astaxanthin and configured with multiple types of nutrient substances and has the advantage of being stable in color enhancing effect in serving as the color enhancing agent for aquatic animal breeding.

The invention discloses an efficient and accurate phosphorus removal system for slowing down membrane blockage and phase membrane corrosion. The efficient and accurate phosphorus removal system comprises an online monitoring module, a PLC control module, a model calculation module and an automatic dosing module. The PLC control module adopts a feedforward superposition feedback control strategy, takes orthophosphate concentration of a water outlet of the A2O biological pool and total inflow as feedforward control signals, determines an accurate phosphorus removal agent amount required by phosphorus removal, the orthophosphate concentration of the water outlet of the MBR membrane pool is used as a feedback control signal for checking and valuing the adding amount of the phosphorus removal agent, and the PLC control module transmits a dosing quantity signal to the automatic dosing module to perform frequency conversion control dosing, so that feedback control is realized to adjust the dosing quantity. According to the phosphorus removal system, the dosage of chemicals can be reduced, it is guaranteed that the total phosphorus (TP) of effluent of a sewage plant reaches the standard, membrane pollution and phase membrane corrosion, caused by iron ions in the phosphorus removal agent, of an MBR membrane are effectively relieved, and refined operation management of the sewage plant is achieved.

The invention discloses a non-combustion cigarette iron-based heating source composition based on a chemical self-heating reaction, and an application thereof. The composition is composed of the following components, by mass: 4.2-21.0% of iron powder, 48.6-72.7% of potassium permanganate, 5.7-11.9% of an acidic substance, 0-14.4% of anhydrous magnesium, 0-9.4% of activated carbon, 9.7-12.5% of sodium chloride, 0-6.1% of manganese dioxide. The invention provides the novel composition as a heat source of the non-combustion cigarette. With the composition, heating rate is high, maximum temperature is higher, temperature lasting time is long, an activation manner is convenient to operate, heating efficiency is high enough, and a heat release time meets the requirement. The dose is low, such that a heating cavity volume is reduced, and the composition is relatively safe and convenient during application and transportation. The cost is relatively low. The composition and the application have important popularization and application values.

The invention discloses a sildenafil oral fast dissolving film and a preparation method thereof. The sildenafil oral fast dissolving film comprises raw materials as follows: sildenafil citrate, a polymer film-forming material and auxiliary materials, wherein the auxiliary materials comprise a first auxiliary material which comprises a taste masking agent, a plasticizing agent and a penetration enhancer. According to the sildenafil oral fast dissolving film, sodium chloride is use as the special taste masking agent, so that the bad taste of sildenafil citrate is completely masked, and the rate of sildenafil citrate penetrating through oral mucosae of animals is obviously increased after the penetration enhancer is added; the film is prepared with a casting method, and the taste masking agent in the finished film can effectively mask bitterness of sildenafil citrate. The film in the dosage form has the characteristics of rapid disintegration property, good drug compliance, low production energy consumption, little dust, low cost and high efficiency, can be taken without water, and is better than most oral solid preparations.

The invention belongs to the technical field of medical instruments and particularly relates to an otolaryngology dosage adjustable doser. The otolaryngology dosage adjustable doser solves the problemthat a single user cannot complete dosing operation and observation of dosage during dosing operation. According to the scheme, the otolaryngology dosage adjustable doser comprises a transparent syringe and a sleeve arranged at the outlet end of the syringe in a sleeve mode, and one end of the sleeve, which is away from the syringe, is connected with a universal pipe which is connected with a dosing head; the outer wall of one side of the dosing head, which is away from the universal pipe, is provided with an outlet hole, and the top of the dosing head is fixedly provided with a probe; the circumferential outer wall of the syringe is slidingly connected with a fixing ring in a sleeve mode, the inner wall of the fixing ring is provided with a mounting groove in a ring structure, and a sensing ring is mounted inside the mounting groove. The otolaryngology dosage adjustable doser can conveniently enter deep into ear, nose or throat and monitor lesion and achieve observability of dosing processes as well as automatic dosing in a quantitative and adjustable mode, thereby facilitating operation by a single user and saving time and labor.

The invention relates to an integration method of the production process of 2,3-butanediol and the recycling of microbial biomass, and the integration method comprises: the 2,3-butanediol is produced by the fermentation of the serratia marcescens seed bacteria; the recovered serratia marcescens is added in a fermentation culture medium of the second fermentation for carrying out the further fermentation culture. The serratia marcescens in fermentation products can be repeatedly utilized. The use of the method can not only improve the yield, the conversion rate and the production ability of the 2, 3-butanediol, but also effectively solve the thallus pollution and the recycling problem of resources, save the energy and reduce the emission.

The invention discloses a method for detecting amino acid content in calcium zinc gluconate oral solution. According to the detection method, pre-column derivatization-reversed-phase high-performanceliquid chromatography is adopted, and 2,4-dinitrofluorobenzene is taken as a derivatization reagent. The detection method comprises the following steps: (1) preparing a separation degree stock solution containing lysine hydrochloride and other impurity amino acids; (2) determining a corresponding relation between the dose of the derivatization reagent and the amino acid content in the separation degree stock solution; (3) preparing a test stock solution by utilizing calcium zinc gluconate oral solution, and carrying out derivation reaction, wherein the addition amount of the derivatization reagent is determined according to the corresponding relation determined in the step (2) and the amino acid content in the test stock solution; and (4) detecting by utilizing a reversed-phase high-performance liquid chromatograph. According to the method for detecting amino acid content in calcium zinc gluconate oral solution disclosed by the invention, the addition amount of the derivatization reagent is optimized, the pH value of a mobile phase is optimized, the detection process is excellent in repeatability, and the method is high in sensitivity and stable and reliable in appearance time.

A wash tub for a hospital central sterile supply department comprises a tub body. The outside of the tub body is provided with an outer shell. An electric heater unit for heating a cleaning fluid in the tub body is arranged between the outer shell and the tub body. Temperature of the cleaning fluid in the tub body is adjusted through a temperature controller. The bottom of the tub body is provided with a water outlet. A switch control valve is disposed at the water outlet. The water outlet is communicated with an external drain pipe. A supporting plate is also disposed inside the tub body. The edge of the supporting plate is suspended in the cavity of the tub body through a locating boss on the inner wall of the tub body. The bottom of the supporting plate is connected with a suspended frame through a strut. A groove for placing a measuring cup is also arranged in an end face of the outer shell. The wash tub has a simple structure. It is very convenient to put a soaked object into the wash tub or take a soaked object out of the wash tub. In addition, addition amount of water and addition amount of the cleaning fluid can accurately be controlled, and it is convenient to control both liquid temperature and soaking time. Soaking effect of medical apparatuses and instruments is raised, and work efficiency is also enhanced.

The invention belongs to the technical field of unsaturated polyester resin, and specifically relates to quartz stone resin with high stability and a preparation method thereof. The quartz stone resinwith high stability provided by the invention is in a liquid state at a normal temperature and comprises the following raw materials: dihydric alcohol A, dihydric alcohol B, saturated dicarboxylic acid, maleic anhydride, a crosslinking agent and a polymerization inhibitor, wherein the dihydric alcohol A is two or three selected from the group consisting of glycol, methyl glycol or diethylene glycol; the dihydric alcohol B is a mixture of 1,4-butanediol and MPO; and the saturated dicarboxylic acid is p-phthalic acid or isophthalic acid and phthalic acid anhydride. The quartz stone resin with high stability provided by the invention has the advantages of high bending strength, bending elastic modulus and heat deflection temperature, small influence of a temperature on performances, and excellent corrosion resistance; and the preparation method provided by the invention is scientific, reasonable, simple and practicable.

The invention provides ultra-high-performance abrasion-resistant high manganese steel and the production method thereof. The chemical compositions of the steel are that: carbon of 1.00 to 1.50 percent; manganese of 10.5 to 20.0 percent; silicon of 0.30 to 0.80 percent; chromium of 1.3 to 2.8 percent; sulfur of less than or equal to 0.040 percent; phosphorus of less than or equal to 0.070 percent; titanium of 0.06 to 0.20 percent; vanadium of 0.10 to 0.40 percent; boron of 0.002 to 0.010 percent; magnesium of 0.06 to 0.3 percent; rhenium of 0.08 to 0.4 percent; nitrogen of 0.05 to 0.2 percent; the remainder is iron. The production method is that: when the molten steel temperature reaches between 1500 and 1550 DEG C, the nitrogen and the calcium are added within 5 minutes after the molten steel is reduced, the aluminum is inserted and the vanadium (2 to 5 kg / t) and the titanium (4 to 10 kg / t) are added within 10 minutes before steel tapping, the rare earth magnesium (2 to 6 kg / t) is added into a tank when one-third steel is tapped, the rare earth silicon (1 to 4 kg / t) is added into the tank when one-second steel is tapped, the boron (0.1 to 0.3 kg / t) is added into the tank when two-third steel is tapped, the casting temperature of the molten steel is controlled between 1430 and 1460 DEG C. The invention adopts new alloying process, improves the abrasion- resistant performance and the comprehensive mechanical performance of the high manganese steel.