What is the Disodium hydrogen phosphate

Disodium hydrogen phosphate, easy weathering in the air, and placed in the air at room temperature to lose about five water of crystallization and form seven water content, lose all when heated to 100 ℃ water of crystallization and anhydride, 250 ℃ when the decomposed into sodium pyrophosphate. It is easily weathered in the air, and it is extremely easy to lose five molecules of crystal water and form seven water. Soluble in water, insoluble in alcohol. The aqueous solution is slightly alkaline (the PH of 0.1-1n solution is 9.0). In 100 ℃ water of crystallization anhydride, lost 250 ℃ is decomposed into sodium pyrophosphate. The pH of the 1% aqueous solution is 8.8 to 9.2; Insoluble in alcohol. 35.1 ℃ melting and lose five water of crystallization.

The properties and the making of lead difluoride

Lead difluorinated lead, white crystal or powder. There are two types of crystal morphology, the orthogonal transformation is formed more than 316 ℃ the crystallization. Soluble in nitric acid, slightly soluble in hydrochloric acid, slightly soluble in water (20 ℃ and 0.065 G / 100 ml), when the presence of nitric acid or a nitrate class to increase its solubility and insoluble in hydrofluoric acid. The relative density is 8.445 (orthogonal), 7.750 (cubic). Melting point is 824 ℃. The boiling point of 1293 ℃. Toxic, minimum lethal quantity (guinea pig, oral) 4000mG/kG. corrosive

Lead powder and nitrogen trifluoroxide (NF3O) reaction (the two items of fluoride tin) can be prepared to prepare fluorinated lead. Heating reaction temperature 190 ℃, 20 h. The yield is 60%.

The use of lithium peroxide

Lithium peroxide is a white fine powder or yellow particle. Heat up to the melting point decomposition. Water will hydrolyze and produce oxygen and lithium hydroxide. Used as an oxidant. Take lithium hydroxide and hydrogen peroxide.

Application:

It is used as an oxidant to make the raw materials of thermocouples, oxytellurium optical glass, which is used to synthesize lithium, which is also used to make foaming agents.

What is nocodazole

What is nocodazole? Probably a lot of people don't know it very well, and here's the introduction:

Nocodazole is an anti-tumor drug that works by bringing microtubules together. Microtubules are vital to cell into a period of mitosis, many drugs, such as vincristine, colcemid, Nocodazole can interfere with the microtubule polymerization, so that cells stay in G2 / M phase of the cell cycle. In cell biology experiments, these drugs are often used to synchronize cells.

The role of the β-elemene

β-elemene is a pale yellow or yellow transparent liquid with a spicy fennel scent. In oil ether, ether, chloroform, or ethanol, it is almost insoluble in water. The relative density is 0.880-0.890. The molecular formula is C15H24, and the molecular weight is 204.35100, and the boiling point is 252.1.

The liposomes are an effective component of cancer-fighting properties extracted from ginger plant temperature turmeric. Its main biological activity is to reduce tumor cell has the ability of mitotic, induce tumor cell apoptosis, restrain tumour cell growth. The pharmacological experiments showed that the injection of olive aromatic milk in the abdominal cavity had a significant inhibitory effect on the DNA, RNA and protein synthesis of tumor cells. The drug also can direct effects on the cell membrane, make tumor cells is broken, and can change and enhancing tumor cells immunogenicity, and induce and promote the body's immune response to tumor cells. The toxicity of this product is small, and the effect on normal cells and the surrounding white blood cells is less.

What is the Azanavir

Azanavir is a chemical that is C38H52N6O7. The density is 1.178 g/cm3; It's a crystallized solid.

Arzanayas, sold by the name Reyataz, is an anti-retroviral drug for the protease inhibitor (PI) class. Like other antiretroviral viruses, it is used to treat human immunodeficiency virus (HIV) infection.

, the difference between that and other PIs, it can be given once a day (not require multiple doses per day), and lipid of the patients with distribution (the amount of blood cholesterol and other fatty substance) has small impact. Like other protease inhibitors, it is only used in combination with other HIV drugs.

The United States food and drug administration (FDA) approved azanavir on June 20, 2003. Azanavir is the first PI to be approved for a daily dose, and it appears unlikely to cause the side effects of fatty malnutrition and elevated cholesterol. It can also do not cross resistance to other PI. When use, the wei strengthen its effectiveness with los horse that equivalent to have a certain degree of drug resistance in patients with remedial treatment, though, that the strengthening of decreased, that metabolic advantage.

It is the most important drug required for the basic health system on the world health organization's list of essential medicines.

The use of indium oxide

Indium oxide (In2O3) is a new kind of transparent n-type semiconductor, functional materials with wide band gap width, the smaller the resistivity and high catalytic activity, in the field of photoelectric, catalyst, gas sensor has been widely applied. Dana and indium oxide particles size m level in addition to the above function, also has the nanometer material surface effect, quantum size effect, small size effect and macroscopic quantum tunneling effect, etc.

Indium trioxide is an extended product of indium, widely used in fluorescent screen, glass, ceramic, chemical reagent, low mercury and non-mercury alkaline battery additive. Along with the development of science and technology, indium trioxide has become more and more widely used in LCD display especially in ITO.

What is the Yttrium chemical

Yttrium chemical Y2O3, white with yellow powder, insoluble in water and alkali, soluble in acid. Mainly used for manufacture of microwave with magnetic materials and military industry with important material (single crystal; zhe yttrium iron garnet, zhe yttrium aluminum garnet and other composite oxide), also used as optical glass, ceramic material additives, a giant TV screen, with high brightness tube fluorescent powder and other coatings, etc.

Mainly used for manufacture of microwave with magnetic materials and military industry with important material (single crystal; zhe yttrium iron garnet, zhe yttrium aluminum garnet and other composite oxide), also used as optical glass, ceramic material additives, a giant TV screen, with high brightness tube fluorescent powder and other coatings. It is also used to make thin-film capacitors and special refractories, as well as magnetofoam materials such as high pressure mercury lamps, lasers, and storage components. The addition of yttrium to sintering can effectively reduce the grain size of tungsten alloy.

The use of nickel oxide

The nickel oxide (Ⅱ) is a kind of common inorganic compounds, is bivalent nickel oxide, chemical formula for NiO, green powder, widely used in life, is also used for preparing high purity (> 99.98% nickel). This product is harmful to human health, the need to take care of the protection when contacting, the risk that the human body may have carcinogenic to sensitization.

The internal structure of oxidized nickel causes the carrier to be unable to flow, causing it to be insulator and not conductive.

In addition, the physical properties of the nickel oxide also along with the change of preparation of temperature change, with the temperature increasing of preparation, its density and resistance to increase, lower solubility and catalytic activity.

Crystal structure of cubic crystal system, NiO crystal structure is similar to sodium chloride, rock salt structure, in which each Ni around six O recent distance, oxygen atoms to form is octahedron, nickel atoms at its center; And vice versa, oxygen atoms are in the octahedron that is formed by nickel atoms. The whole crystal can be thought of as the Ni with the square of the cube and the same as the other.

Sodium nitrate in industry application

Sodium nitrate, melting point is 306.8 ℃, the density of 306.8 g/cm3 (20 ℃), colorless transparent or white microstrip yellow diamond crystals. Its bitter taste salty, soluble in water and liquid ammonia, slightly soluble in glycerin and ethanol, easy deliquescence, especially in very small amounts of sodium chloride impurities, sodium nitrate deliquescence is greatly increased. When dissolved in water when its solution temperature is reduced, the solution is neutral. When heated, sodium nitrate easily decomposed into sodium nitrite and oxygen. Sodium nitrate can be fuel, it should be stored in a cool, ventilated place. With oxidation, in company with organic friction or collision can cause burns or explosion. Stimulating, toxicity is small, but have a harm to human body.

Enamel is used as fluxing agent, oxidant and to make the enamel powder materials. Used for all kinds of glass glass industry and products of decoloring agent, defoamer, clarifying agent and the oxidation of flux. Inorganic industry as decoloring agent for molten caustic soda and used in the manufacture of other nitrates. Send lubricious agent used in meat processing, food industry can prevent meat metamorphism, and flavoring. Used as a fertilizer industry for acidic soil organic fertilizer, especially for root crops, such as beet, carrot, etc. Dyestuff industry used as production picric acid and raw materials. Metallurgical industry used as steel, aluminum alloy heat treatment. City industrial machine used for metal cleaning agent and preparation ferrous blue agent. Pharmaceutical industry used as a medium of penicillin. Fuel used for tobacco cigarette industry. Used as chemical reagents in analytical chemistry. In addition, also used in the production of explosives and so on.

What is the Sodium periodate

Sodium periodate is sodium periodate, there are two forms, high sodium iodate (chemical formula: NaIO4) and sodium periodate (chemical formula: Na5IO6) that can be used as the oxidant in organic synthesis.

Sodium periodate is the main raw material of pharmaceutical industry, also used as oxidant, reagents used in the food industry, the common analysis and chromatographic analysis reagent.

High sodium iodate, high potassium iodate and periodate oxidation of aqueous solution can be accompanying diol, polyol, alpha hydroxy acid, alpha diketone, alpha amino ketones, 2-1 - amino - hydroxyl compounds, carbon - carbon bonds break, generate the corresponding aldehyde ketone carbonyl compounds. Reaction is quantitative, can be used to speculate that the structure of the reactants

How to get sodium selenide

Selenide sodium is a kind of inorganic compounds, by selenium and sodium, hydrogen as a kind of selenate, its chemical formula is Na2Se

Selenide sodium crystal structure of fluorite structure, and other similar, alkali metal selenide per unit cell has four units

Available method of producing sodium sulphide, because they are all kin compound, with similar properties, can be composed and selenium in ammonia or sodium naphthalene in tetrahydrofuran reaction under the existence of the generated selenide sodium.

The effect of trimetazidine

Trimetazidine for film-coated tablet, remove with a white film after clothes. Used for prophylactic treatment of angina pectoris attack, auxiliary symptomatic treatment of vertigo and tinnitus.

Clinical apply to coronary insufficiency, angina pectoris and old myocardial infarction, etc. For those with severe cardiac insufficiency with digitalis.

Trimetazidine can reduce vascular resistance, increase coronary blood flow and the surrounding blood flow, promote the generation of myocardial metabolism and energy; Can reduce cardiac workload, reduce myocardial oxygen consumption and energy consumption, improve myocardial oxygen supply and demand balance. Still can increase the tolerance to cardiac glycoside. Clinical apply to coronary insufficiency, angina pectoris and old myocardial infarction, etc. For those with severe cardiac insufficiency with digitalis.

What is the Ranolazine

Ranolazine is used per unit of oxygen and glucose metabolism capacity more than fatty acid metabolism capacity, then by using fatty acid metabolism capacity to use glucose metabolic capacity, make the heart using oxygen to do more work, so as to reduce the possibility of angina pectoris attack. In view of the above new mechanism, after oral Ranolazine does not cause slow heart rate and blood pressure to drop. Also can prevent lactic acidosis, greatly enhanced the use security.

Clinical trials using Ranolazine is the most common adverse reactions were headache, dizziness, fatigue. Through the liver and kidney function and other inspection found no obvious abnormalities.

What is the Fimasartan

Fimasartan is a novel selective AT1 receptor blockers, in a variety of types of hypertension showed a rapid and effective antihypertensive effect, very safe and has good tolerance, superior to other similar drugs.

For new vasopressin V2 receptor antagonist, urine excretion function, can improve the blood sodium ion concentration, produce beneficial hemodynamic changes. Its oral is convenient, no drug rapid desensitization, such as high natremia obvious adverse affects. By Japan Otsuka company research and development, on July 26, 2006 was approved in Japan.

The application of titanium nitride

Titanium nitride (TiN) as the typical NaCl structure, is a face-centered cubic lattice and lattice constant a = 0.4241 nm, including titanium atoms in the face-centered cubic horns. TiN is stoichiometric compounds, the composition of the stable range for TiN0.37 - TiN1.16, the content of nitrogen can be within a certain range of change and not due to structure change of TiN. General yellowish-brown TiN powder, superfine TiN powder in black, and TiN crystal are golden. TiN melting point is 2950 ℃, density of 5.43 5.44 g/cm3, 8-9 mohs hardness, good thermal shock. TiN melting point higher than the melting point of most of the transition metal nitrides, and the density is lower than most of the metal nitrides, therefore is a kind of heat resistant material. TiN similar crystal structure and crystal structure of TiC, only the C atom displacement into N atoms.

Titanium nitride (TiN) is fairly stable compounds, at high temperatures with iron, chromium, calcium and magnesium metal reaction, such as TiN, crucible in CO and N2 atmosphere and the acidic slag and alkaline slag, TiN crucible is therefore research just liquid interact with some elements of good container. TiN in a vacuum heating loss of nitrogen, the nitrogen content in low titanium nitride.

TiN with attractive golden color, high melting point and hardness, good chemical stability, and the wetting of the metal structure of small materials, and has high electrical conductivity and superconductivity, can be applied to high temperature structural materials and superconducting materials.

What is the Silicon nitride

Silicon nitride is a kind of important structure ceramic materials. It is a kind of super hard material, itself has the lubrication, and wear resistance, as the atomic crystal; When high temperature oxidation resistance. And it also can resist cold and hot shock, in air heated to above 1000 ℃, a sharp cooling heating sharply again, also won't fracture. It is because of silicon nitride ceramics with such excellent properties, people often use it to manufacture bearings, steam turbine blades, mechanical seal, mechanical components, such as permanent mould. If use high temperature resistant and not easily heat transfer of silicon nitride ceramic to make engine parts of heating surface, can not only improve the quality of diesel engine, save fuel, but also can improve the thermal efficiency.

What is the Silicon carbide

Silicon carbide and silicon carbide (SiC) is using quartz sand and petroleum coke or coal tar, wood chips (green silicon carbide production need to add salt) such as raw material through high temperature electric resistance furnace smelting. There is also a rare mineral silicon carbide in nature, and the mo SangShi. Silicon carbide is also called the moissanite. In contemporary C, N, B the oxide refractory raw materials in the high technology, such as silicon carbide as the most widely used, one of the most economic, can be called corundum or refractory sand. At present China's industrial production of silicon carbide is divided into two black silicon carbide and green silicon carbide, are the six-party crystal, specific gravity is 3.20 ~ 3.20, the microhardness of 2840 ~ 3320 kg/was.

Green silicon carbide black silicon carbide and silicon carbide two commonly used basic varieties, are alpha SiC. (1) black silicon carbide containing SiC by about 95%, the toughness higher than that of green silicon carbide, mostly used for processing low tensile strength of material, such as glass, ceramics, stone, refractory material, cast iron and nonferrous metal, etc. (2) the green silicon carbide containing SiC is about more than 97%, good self-sharpening, mostly used for processing hard alloy, titanium alloy and optical glass, also used for honing cylinder jacket and fine grinding HSS cutting tools. And cubic silicon carbide, it is a special process for making yellow crystals, to make the abrasive tool suitable for bearing the superfinishing, can make the surface roughness from a processing Ra32 ~ 0.16 microns to Ra0.04 ~ 0.02 microns.

The purpose of the magnesium fluoride

Magnesium fluoride is a halogen element fluorine and magnesium metal compounds, a colorless square crystal or powder, odorless, soluble in water and alcohol, slightly soluble in dilute acid, soluble in nitric acid.

Magnesium fluoride under electric heating are weak fluorescent purple, the polarization of the crystal has a good effect, especially suitable for uv and ir spectra. There are toxic.

use

Optical lens coating. The optical coating on a layer of magnesium fluoride membrane layer, can reduce the camera interface of the incoming light reflex, reduce the halo, improve the quality of imaging. (thin film interference)

Magnesium fluoride also used in ceramic, electronics industries; Manufacturing ceramics, glass; Metallurgy magnesium flux; The fluorescent material of cathode ray screen; Flux, etc.

What is the Alumina

Alumina (Al ₂ O ₃) is a kind of compound high hardness, melting point is 2054 ℃, boiling point is 2980 ℃, is at high temperatures is ionization ion crystal, often used in the manufacture of refractory products. Industrial Al2O3 is by bauxite (Al2O3 forced the 3 h2o) and preparation of diaspore, for the high purity requirements of Al2O3, usually prepared by chemical methods.

Al2O3, there are many similar crystal, at present there are more than 10 kinds of known, there are mainly three kinds of crystal type, namely the gamma Al2O3, beta Al2O3, alpha Al2O3 (corundum). Which structure is different, with different properties in high temperature above 1300 ℃ is almost entirely into alpha Al2O3.

Alumina containing aluminum and oxygen. If the bauxite raw materials through chemical processing, removal of silicon, iron, titanium oxide and the product is of high purity alumina raw materials, Al ₂ O ₃ content is in commonly 99% above. Mineral phase by 40% ~ 76% of gamma - Al ₂ O ₃ and 24% ~ 60% of alpha Al ₂ O ₃ composition. Gamma - Al ₂ O ₃ in 950 ~ 1200 ℃ can be transformed into alpha Al ₂ O ₃ (corundum), at the same time the volume shrinkage of significantly.

The application of magnesium

Magnesium oxide (chemical formula: MgO style) of magnesium oxide, an ionic compound. Temperature is a white solid. Magnesium oxide magnesium Israeli stone form exists in nature, is the source of smelting magnesium.

Areas of application: mainly used for the production of magnesium products. Light burning magnesium oxide and magnesium chloride aqueous solution with a certain proportion coordination, but gelation hardened into a certain physical and mechanical properties of hardened body, called magnesite cement. Magnesium as a new type of cement, cement has light weight, high strength, fireproof and heat insulation, energy conservation, environmental protection and other advantages, can be widely used in building materials, municipal, agriculture, machinery, etc.

The properties of titanium nitride and function

Titanium nitride (TiN) as the typical NaCl structure, is a face-centered cubic lattice and lattice constant a = 0.4241 nm, including titanium atoms in the face-centered cubic horns. TiN is stoichiometric compounds, the composition of the stable range for TiN0.37 - TiN1.16, the content of nitrogen can be within a certain range of change and not due to structure change of TiN. General yellowish-brown TiN powder, superfine TiN powder in black, and TiN crystal are golden. TiN melting point is 2950 ℃, density of 5.43 5.44 g/cm3, 8-9 mohs hardness, good thermal shock. TiN melting point higher than the melting point of most of the transition metal nitrides, and the density is lower than most of the metal nitrides, therefore is a kind of heat resistant material. TiN similar crystal structure and crystal structure of TiC, only the C atom displacement into N atoms.

Titanium nitride (TiN) is fairly stable compounds, at high temperatures with iron, chromium, calcium and magnesium metal reaction, such as TiN, crucible in CO and N2 atmosphere and the acidic slag and alkaline slag, TiN crucible is therefore research just liquid interact with some elements of good container. TiN in a vacuum heating loss of nitrogen, the nitrogen content in low titanium nitride.

TiN with attractive golden color, high melting point and hardness, good chemical stability, and the wetting of the metal structure of small materials, and has high electrical conductivity and superconductivity, can be applied to high temperature structural materials and superconducting materials.

Zirconium carbide is what

Zirconium carbide is dark gray metallic cubic crystal. Crispy. Melting point is 3540 ℃. The boiling point of 5100 ℃. The apparent density of 6.70 g/cm3. Mohs hardness 8 ~ 9. Insoluble in cold water and hydrochloric acid. Soluble in nitric acid or hydrogen peroxide solution of hydrofluoric acid and hot concentrated sulfuric acid. Generate zirconium tetrachloride reaction with chlorine gas under high temperature. 700 ℃ in air combustion generated zirconia. Do not react with water.

Zirconium carbide is a kind of high hardness and excellent high temperature refractory high melting point materials. Used as a raw material of solid propellant rocket engine. Used in the production of alloy steel. Is a metal zirconium and zirconium tetrachloride raw material production, and [1] promising fine ceramic materials.

The effect of nanometer silver antibacterial agent

Nanometer silver antibacterial agent is the particle size of nanoscale metal silver elemental do, particle size is mostly about 25 nm. Then using special technology, the nanometer silver into the carrier made solution.

Nanometer silver antibacterial agent refers to in a certain period of time, make certain microorganisms (bacteria, fungi and viruses, etc.), yeast, algae growth or reproduction remain below the necessary level of chemicals. Nanometer silver antibacterial agent is with antibacterial and bactericidal performance of the material or product.

Catalytic antibacterial mechanism: silver ion contact reaction, microbial common composition damage or dysfunction. When traces of silver ions to microbial cell membrane, which negatively charged, depending on the coulomb attraction, make both solid adsorption, in the cell walls of silver ions to penetrate into the cells, and with SH reaction, make protein coagulation, damage cells synthetase activity, loss of split proliferation and cell death. Silver ions can also damage microbes electronic transmission system, respiratory system and the mass transport system.

The purpose of the cryolite

Cryolite is a kind of mineral, six fluorine sodium aluminate (Na3AlF6), white monoclinic system (1009 degrees c), slightly soluble in water, molten cryolite can dissolve alumina, flux in electrolytic aluminium industry, manufacturing milk white glass and enamel sunscreen.

Cryolite is mainly used as fluxing agent in the production of aluminum electrolysis; Also used as abrasive products wear-resistant additive, can improve the grinding wheel wear, cutting, cutting force and prolong the service life of the grinding wheel and storage time. Flux ferroalloy and flux of rimming steel, nonferrous metal, casting deoxidizer, olefine polymerization catalysts, and antireflective coating used in glass, enamel of emulsifier, milky white agent, glass of weld material flux ceramics filler, pesticides, pesticides and other industries enterprises.

The purpose of the calcium oxide

Calcium oxide,  is a kind of inorganic compounds, its chemical formula is CaO, the common name for quick lime. Physical properties is the surface of white powder, no pure as the gray, containing impurities with pale yellow or gray, with moisture absorption.

use

1, as a filling agent, such as: used as filling agent of epoxy adhesives;

2, used as analytical reagent, absorbent when used as the carbon dioxide gas analysis, spectral analysis reagents, high purity reagents used in the semiconductor epitaxy in production, diffusion process, laboratory dry ammonia and alcohol dehydration, etc.

3, used as raw materials, can produce calcium carbide, soda, bleaching powder, etc., also used in leather making, waste water purification, calcium hydroxide and calcium compounds;

4, can be used as a building material, metallurgy, fluxing agent, cement accelerator, phosphor powder flux;

5, used as a vegetable oil decoloring agent, drug carrier, soil conditioner and calcium fertilizer;

6, can also be used for refractory material, desiccant;

7, agricultural machinery can be produced 1, 2, and underwater epoxy adhesives are used as the reaction agent and its resin 2402;

8, used for acid waste water treatment and sludge conditioning;

9, also can be used as boiler stop using protective agent, and using lime moisture absorption ability, make the boiler steam system of metal surface dry, prevent corrosion, suitable for low pressure, medium pressure, small capacity steam drum boiler of long-term outage protection;

Preparation of calcium hydroxide, 10, can and water reaction equation: CaO + H ₂ O = Ca (OH) ₂, belongs to the chemical reaction.

Barium fluoride application

Barium fluoride is a kind of cubic fine crystallization. Slightly soluble in hot water, soluble in acid and ammonium chloride. Poisonous. In the nature in the form of fluorinated barium ore (frankdicksonite).

Substance use

Used in the manufacture of motor brush, optical glass, optical fiber, laser generator, fluxing agent, coating agent enamel, also can make wood preservatives and pesticides. Used for flux, enamel manufacturing; Used as embalming fluid and solid lubricant. BaF2 crystals used as ultraviolet or infrared and laser window materials. Barium fluoride crystal is a kind of excellent high density optical materials, excellent performance, is also a good buffer layer, can connect different semiconductor lattice constant. Barium fluoride crystals with excellent performance and fast scintillation characteristics of time, to make it in nuclear medicine, nuclear physics, particle physics, and the use of remote sensing technology, etc, more and more widely. Also has the wave resistance is good, use high temperature etc. Can be used for CO2 laser device and window materials and used for other optical components of the machine.

Barium material can effectively promote the preparation of aluminium fluoride type fluorescent powder, used in solid phase of YAG: CE phosphors. Barium fluoride is also commonly used in cryogenic refrigeration thermal imaging system and can be used as substrate in some applications. Barium fluoride containing no oxygen atoms in molecules, be used as blast furnace ferromanganese silicon solvent, in the blast furnace ferromanganese desilication in high desilication rate and low loss rate of manganese oxide. Barium fluoride have a significant role in the development of high temperature superconducting device, in the superconducting thin film deposition (YBaCuO) surface protective layer of a layer of barium fluoride as YBaCuO, can maintain the stability of the YBaCuO. Barium fluoride has a very broad application field and scientific research value.

What is the Sodium selenite

Sodium selenite is white crystalls or crystal powder, soluble in water, insoluble in ethanol. Melting point is 350 ℃. To be toxic, oral one gram of death, LD50 (rats through the mouth) for 7 mg/kg. Separation elemental selenium in reducing agent. The solution obtained in calcium chloride at room temperature in vacuum dryer to remove moisture, and join the seed crystal precipitation, after the suction filter, drying in the dryer, a quick sodium selenite hydrate. Will the reaction liquid in 60 ~ 100 ℃ evaporation, crystallization, dehydration, drying, can get anhydrous sodium selenite. Of amino acid metabolism, protein synthesis, carbohydrate metabolism, biological oxidation have influence. Livestock and poultry body selenium deficiency, will seriously affect the function of the growth and reproduction of livestock and poultry.

1. Selenium is glutathione glycosides peptide part of peroxidase, maintain the function of the cell membrane by oxidation, improve lipid properties of protein production of endogenous antioxidants. Participate in energy conversion, affect the metabolism of fat emulsion, absorption and the absorption of a variety of vitamins play an extremely important role. At the same time also to participate in and the synthesis of coenzyme A, coenzyme Q, affect the function of other enzyme systems. Of amino acid metabolism, protein synthesis, carbohydrate metabolism, biological oxidation have influence. Livestock and poultry body selenium deficiency, will seriously affect the function of the growth and reproduction of livestock and poultry. Alkaloids. Seed germination test. Remove the green to make glass. Colored glaze preparation.

2. Sodium selenite selenium supplement enhancer used in feed.

3. Used as a nutritional enhancer, feed additives.

4. Used as a biochemical reagents, test alkaloid, seed germination test. For the red glass and colored glaze preparation.

What is the TiC

TiC pale gray, cubic crystal system, insoluble in water, has the very high chemical stability, almost had no chemical reaction with hydrochloric acid, sulfuric acid, but can be dissolved in aqua regia, nitric acid, and hydrofluoric acid, also soluble in alkaline solution of oxide.

TiC is a crystal metallic iron gray, belong to the NaCl type face-centered cubic structure, lattice constant is 0.4329 nm, space group for Fm3m, carbon atoms in the lattice positions with titanium atoms are equivalent, TiC with strong covalent bonds between atoms combine, several characteristics of similar metal, such as high melting point, boiling point, and hardness, hardness is second only to diamond, good thermal conductivity and electrical conductivity, at low temperature even show the superconductivity. TiC, therefore, is widely used in the manufacture of metal ceramic, heat-resistant alloy, hard alloy, wear-resistant material, high temperature radiation material and other high temperature vacuum devices, with its complex phase of the preparation of materials in mechanical processing, metallurgical minerals, aerospace and fusion, and other fields has been widely used

The application of iridium category

Pure iridium specially used in aircraft spark plugs, used to make more scientific instruments, thermocouple, resistance wire, etc. For alloy, can strengthen other metal hardness. It with platinum alloy (10% and 10% of the Ir of Pt), due to the small expansion coefficient, commonly used to make international standard metric scale, kg of the original device in the world is made of platinum and iridium.

Iridium - 192 is an isotope of iridium, obtained by iridium - 191 after neutron radiation. It has a certain amount of radioactive, and wider use can be used to treat cancer and material inspection, etc.

Belong to 2 class source (high hazards), in the absence of protection, after being "iridium - 192" radiation exposure can lead to serious low red blood cells, white blood cells and platelets, and can severely damage bone marrow hematopoietic function, the structure of the cell's chromosomes affected by radiation and appear damage, the activity of telomerase also fell, skin and organs will immediately show the effect of damage, single cell injury prone to cancer, may also affect the genetic.

With the arrival of radioactive isotope iridium - 192 sources, the portable gamma detector, has been widely used in industry. Iridium - 192 gamma detector, moderate due to the gamma ray energy, high specific activity, radioactive sources in common under the thickness of the material has high detection sensitivity, because of the iridium - 192 gamma detector, a panoramic exposure can achieve 360 degrees, thus greatly improving the detection efficiency, save manpower and material resources and financial resources, is cannot be replaced by other NDT methods. For inspection instruments that contain iridium - 192 the use of the country has stated in its production and operation specification.

Because the damage is bigger, such as iridium - 192 of cancer cells in the treatment of cervical cancer and biliary diseases such as tumor has more significant effect, but temporarily cannot effect a radical cure these diseases.

What is the Atazanavir

Atazanavir is a chemical formula for C38H52N6O7. The density of 1.178 g/cm3; Is a crystalline solid.

With commodity name Reyataz sales, it is a protease inhibitor (PI) class of antiretroviral drugs. Like other antiretroviral, it is used in the treatment of human immunodeficiency virus (HIV) infection.

Atazanavir with other PIs difference is that it can be given once a day (not require multiple doses per day), and lipid of the patients with distribution (the amount of blood cholesterol and other fatty substance) has small impact. As with other protease inhibitors, its combination with other HIV drugs use only.

The role of adenosine triphosphate

Adenosine triphosphate (ATP) is yellow purine nucleotides as a condition for the substrate, the fermentation technology of high energy compounds, adenosine triphosphate (ATP) is the body tissue cells activity is the direct source of the energy needed for all life, is known as the energy in the cell of the "molecular currency", storage and transmission chemical energy, protein, fat, sugar and nucleotide synthesis are required to participate in it, can make the body various repair and regeneration of cells, strengthen cell metabolism activity, to treat various diseases have strong pertinence.

Adenosine triphosphate (atp) as a coenzyme. Have role to improve the metabolism of the body, participate in body fat, protein, sugar, nucleic acid and nucleotide metabolism, is the main source of energy in the body at the same time. Suitable for cell injury after enzyme loss caused by the disease. Animal experiments found that this product has obvious effect to the electrophysiology of myocardial cells, inhibits slow reactions within the cells of calcium ion flow, blocking and extension of the atrioventricular node turn-back loop prior to transmission, large doses can be blocked atrioventricular bypass the exhumation of sex, can strengthen the role of the vagus nerve, available room sex on the room tachycardia.

The effects of clindamycin

Clindamycin is a kind of appearance is white crystalline powder chemicals, chemical formula for C18H33ClN2O5S, molecular weight of 424.98300, melting point of 141 ~ 143 ℃. Ingredient of clindamycin phosphate, clindamycin for antibiotic medicine, clinical is mainly used in abdominal cavity and gynecological infections caused by anaerobic bacteria, staphylococcus aureus osteomyelitis is the preferred treatment.

Clindamycin antibacterial spectrum with clindamycin, but strong antimicrobial activity, clindamycin oral absorption quickly and completely (about 90%), eating to absorb the impact is small. [4]. Clindamycin in fetal blood concentration is greater than clindamycin, concentration in milk can be up to 3.8 mu g/ml, pregnant women and lactating women should be paid attention to use the product advantages and disadvantages. High protein binding rate (90%). Oral tmax was 0.75 ~ l hours, T1/2 is 2.4 ~ 3 hours, children of 2 ~ 2.5 hours, when kidney function decline slightly longer, for 3 ~ 5 hours. 24 hours urine by 10%, 3.6% with droppings

The role of the Tangerine-Pith-Extract

Tangerine-Pith-Extract is a kind of traditional Chinese medicine (TCM), the sheen and slightly bitter taste. Attending qi spleen, dry wet phlegm.

Often strip into disc, base are linked together, some irregular flake, 1 ~ 4 mm thick. Orange red or reddish brown, outside surface has fine wrinkles and concave dot oil under the room; Inner surface pale yellow white, rough, yellowish-white or yellowish brown body vascular bundles. Quality is a bit hard and brittle. Sweet, sheen, bitter taste. Wide dried tangerine or orange peel, often 3 disc is linked together, neat shape, uniform thickness, about LMM. Dot oil chamber is bigger, to light, transparent and clear. Qualitative softer.

Orange peel ethanol extract and ether extract of penicillium oxalate, sickle sickle and bacteriostatic activity of aspergillus flavus. The results showed that orange peel ethanol extract of the bacteriostatic action of three selected mold is better, the sickle sickle bacteria, penicillium and aspergillus flavus minimum bacteriostatic wormwood oxalate concentration 4%, 7% and 13% respectively; And orange peel ether extract of the bacteriostatic action of three selected mold is not obvious, the concentration of 13% to show the sickle sickle and penicillium oxalate inhibitory effect, and within the scope of the selected concentration showed no inhibition of aspergillus flavus.

What is the Verbena

Verbena (Latin names: Verbena officinalis l.), perennial erect herb, up to 120 cm tall, base lignification, leaves simple, opposite, ovate to ovate, long bristles on both surfaces, the following MAO especially on veins. Or axillary spikes terminal, flowers violet, sessile, calyx membranous, tubular, corolla slightly shows two lip, filaments very short; Ovary glabrous, fruit parcel within calyx, small nuts. And 6 - in October.

Verbena extract, cool, tiny Veda, taste cool blood, blood stasis, menstruation, clear heat, detoxify, relieve itching, insect repellent, swelling effect.

What is the croton extract

What are the croton extract medicinal value? Here is introduced:

Crotonic heat, have big poison, belong to hot cathartic, but intestine diarrhea and integrated, by water bloated, hysteresis and clarification of the intestines and stomach heavy cold nights dyspepsia Gu cold. Also used to cure ulcers, broken product detoxification. In addition, croton oil can irritate the skin mucous membrane, internal and have completed xie effect, have very strong insecticidal antibacterial ability.

Medicinal value

Xie cold product, obsessed with the customs clearance, phlegm, water, pesticides. Product grinds to cure cold, chest pain, abdominal distension with any blood, phlegm, diarrhea, edema, external use to treat throat wind, throat bi, the evil sores acariasis.

The purpose of the nano titanium nitride

Nano titanium nitride high purity, small particle size, uniform distribution, specific surface area, high surface activity, high nitrogen content (> 30%), high temperature resistance, oxidation resistance, high hardness, excellent infrared absorption performance (80%), uv shielding is more than 85% above, has the good electrical conductivity. Application field 1 nano titanium nitride applied to plastic packaging materials on high separation, solve the yellowing 2 in PET engineering plastics applications: a small amount of nano titanium nitride powder used in thermoplastic engineering plastics such as PET, PA, etc., can be used as a crystallization nucleating agent, mixing scattered nanometer titanium nitride and glycol into nanometer size, make the nano titanium nitride by means of polymerization better dispersion and PET engineering plastics, can greatly accelerate the crystallization rate of PET engineering plastics, the shape is simple, enlarge the range of PET engineering plastics. At the same time, numerous nano titanium nitride particles dispersion with PET, the nano effect can make the wear resistance of PET engineering plastics, the amplitude of the shock resistance is greatly improve; 3 high rate of thermal radiation coating application: high nitrogen content of nano titanium nitride powder as the high rate of thermal radiation in the high temperature used in the coating material of key materials, adding the group section of the coating material adopting plasma spraying technique was used to prepare coating, testing found that thermal sink, can be greatly improved the product is mainly used in high temperature furnaces energy-saving, military industry, etc; 4, such as the development of lead-free solder materials in tin, silver, copper, zinc alloy, such as adding trace titanium nitride nano powder, lower the melting temperature of 200 ℃, generate alloy more even, reduce the temperature of 30 ℃ oxide solid solution, tin-lead solder can not only achieve the original temperature, if we can further improve the invasive, namely solving existing lead-free solder biggest difficulty of the application, 5 green electronic materials preparation cannot use harmful elements such as lead, cadmium, high chromium, lead, cadmium ceramic dielectric, high temperature bonding glass phase encapsulated glass glaze, difficulty is high temperature solid phase synthesis, high softening point, high temperature, a China can trace titanium nitride nano powder can make solid instead should reduce a temperature of 200 ℃, and even reduce 50 ℃, to be able to use the original process equipment, and is also a big breakthrough. Titanium oxide and its solid solution itself is composed of electronic materials, through the nano form the introduction of beneficial mutations may lead to performance; 6 pollution laws restrict the use of bromine, benzene polymer, bring electronic flame retardant, plastic shell skeleton puzzle, if the trace is added in the engineering plastics of silicon nitride, silicon carbide, titanium nitride, titanium carbide, such as nano powder, not only increase the mechanical strength, wear-resisting and heat-resisting performance, such as can replace contain elements of bromine flame retardant material performance, the application of organic polymer is also a big breakthrough; Other areas of application: 7 in the nano composite hard tool, hard alloy, high temperature ceramic conductive material, heat-resisting wear-resisting material, dispersion strengthened material and so on, can also be used in fuel cell electrode catalyst, anti-static materials and conductive ceramics. The packing storage This product is inert gas antistatic packaging, should be kept sealed in a dry, cool environment, should not be exposed to the air for a long time, be affected with damp be affected with damp proof reunion, affect the dispersion performance and using effect.

What is the Cemented carbide

Cemented carbide is a hard compound and refractory metal bonding metal through powder metallurgy technology made of an alloy material.

Cemented carbide with high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and a series of excellent properties, especially its high hardness and wear resistance, even at 500 ℃ temperature basic remains the same, there are still very high hardness at 1000 ℃.

Hard alloy are widely used as a cutting tool material, such as turning, milling, planing tool, drilling, boring cutter, etc., used for cutting cast iron, non-ferrous metal, plastic, chemical fiber, graphite, glass, stone and ordinary steel, can also be used for cutting heat resistant steel, stainless steel, high manganese steel, tool steel and other hard processing material.