What are the applications of rare earth metal neodymium

Neodymium is silvery white metal, melting point 1024 ° C, the density of 7.004 g/cm after, have paramagnetism. Neodymium is one of the most lively rare earth metals, in the air can quickly darkened, generated oxide; In cold water, slow reaction, reaction rapidly in the hot water. Neodymium-doped yttrium aluminum garnet and neodymium glass can be instead of ruby laser materials, praseodymium and neodymium glass can make goggles. Neodymium (Nd) : along with the birth of the elements of praseodymium, neodymium also arises at the historic moment, the arrival of neodymium active rare earth field, plays an important role in the field of rare earth, and around the rare earth market.

Elements with its unique position in the field of rare earth neodymium, become the hot spot in the market for many years. Is the biggest users of metal neodymium in ndfeb permanent magnet materials. The coming of ndfeb permanent magnets for rare earth high-tech areas has injected new vigor and vitality. Ndfeb magnets, magnetic energy product is high, known as "the king of the permanent magnet, with its superior performance is widely used in electronics, machinery and other industries. Success of the alpha magnetic spectrometer, marks the magnetic of ndfeb magnets in China has entered the world first-class level. Nd also applies to non-ferrous metal materials. By adding 1.5 2.5% magnesium or aluminum alloy neodymium, can improve the high temperature properties of the alloy, air tightness and corrosion resistance, widely used in aerospace materials. In addition, neodymium-doped yttrium aluminum garnet produce shortwave laser beam, under 10 mm in industry are widely used in thickness of welding and cutting thin materials. On health care, neodymium-doped yttrium aluminum garnet laser instead of a scalpel to remove surgery or disinfect the wound. Also used in glass and ceramic materials coloring and neodymium rubber additives. With the development of science and technology, rare earth science and technology development and extension, neodymium will have a broader use of space.

The nature of the mercuric oxide

Mercury oxide mercury (II) (oxidation) is a kind of alkaline oxide, as inorganic substances, chemical formula for HgO, bright red or orange-red scaly crystalls or crystal powder, almost insoluble in water, insoluble in ethanol, 500 ℃ when the decomposition. Highly toxic, stimulating. Mercury oxide can be used for making other mercury compounds, and also used as a catalyst, pigment, antibacterial and mercury electrode material in the battery.

Bright red or orange-red scaly crystalls or crystal powder. When very fine powder of yellow, quality, no smell. But the color has nothing to do with particle size. Soluble in dilute hydrochloric acid, dilute nitric acid, alkali and alkali iodide cyanide solution, slowly dissolve in bromine

The lye, almost insoluble in water, insoluble in ethanol. Relative density 11.30. Toxic, median lethal dose (rats, through the mouth) 18 mg/kg. Stimulating. Action by light slowly becomes dark, there are poisonous! Heating when the temperature reached 500 ℃ oxide mercury will become elemental mercury, the decomposition of releasing oxygen (chemical equations for heat hgo = = 2 hg + O2 write). If the heating temperature below the decomposition temperature, color black, cold again after primary colors. Almost insoluble in water and ethanol, soluble in nitric acid and hydrochloric acid to form a high mercury salt.

What drug effective for neuron disease

　　The Riluzole , its chemical name is: 2 - amino - 6 - trifluoro methoxy benzothiazole. This product is white or kind of white. For the treatment of muscle atrophy in patients with amyotrophic lateral sclerosis, can prolong the survival time and/or delay of trachea incision.
　　Amyotrophic lateral sclerosis (ALS) or motor neurone disease is a progressive fatal disease. There are two kinds of form: the disease pathogenesis or medulla oblongata of the body. Both of upper and lower motor neuron loss, resulting in progressive and irreversible muscle wasting and weakness. Although the disease pathogenesis is not yet fully understand, glutamate toxicity is a possible cause of the neuron damage. So now will be able to adjust in glutamate levels in the central nervous system drugs as a possible cure.
　　Benzothiazole drugs,Riluzole is this kind of drug glutamic acid, nerve protection mechanism is complex, involving several different process. Already know is that it can inhibit the presynaptic glutamate release and can prevent glutamate and receptor activation. This product also can make the nerve endings and the potentials of the dependence of sodium channel inactivation, stimulate dependent on G protein signal transduction process.

　　In vitro, this product can protect the cultured motor neurons from the toxic effects of glutamic acid activation, and prevent the ALS patients due to lack of oxygen or exposed to toxic factors in the CSF of lead to neuronal death. In the mouse model of spinal motor neuron degeneration, this product can improve its mobility.

The main role of Pirenzepine

Pirenzepine, as a kind of selective anticholinergic drugs, cells of the stomach variety of alkali receptors with high affinity, and for smooth muscle, cardiac muscle and salivary glands and other variety of alkali receptor affinity is low, so the application of general treatment doses, only can inhibit the secretion of gastric acid, and there are few other choline drug resistance to the pupil, gastrointestinal smooth muscle, heart, salivary glands and bladder muscle and other side effects. Doses can inhibit the production of saliva, only large doses can inhibit gastrointestinal smooth muscle and causes tachycardia.

Pirenzepine is mainly used in the treatment of gastric and duodenal ulcer, and can obviously relieve patients' pain, reduce the dosage of antacids. Recent ulcer healing rate at about 70% one 94%, curative effect and cimetidine, is better than that of carbenoxolone sodium. With cimetidine share can enhance the effect of the inhibition of gastric acid secretion. [usage and dosage] adult commonly used oral doses of 50 mg, 1, 2, early take one and a half hours before dinner. Treatment with 4-6 Zhou Weiyi. Severe cases, 1, volume can be increased to 150 mg, three times. Require long-term treatment of patients, may be for 3 months.

Where can I buy Metal Tin

Tin, the metal element, low melting point metal element, a bluish white luster, in the compound is two valence or tetravalent, will not be air oxidation, mainly carbon dioxide (cassiterite) and various sulfides (such as Liu Xishi) form. Element symbol Sn. Tin is the famous "hardware" - one of gold, silver, copper, iron, tin. As early as in ancient times, people discovered and used tin. A number of ancient tombs in China, they often find some tin pot, like tin tin candlestick. According to research, China's Zhou Dynasty, the use of tin has been very common. In the ancient tombs of Egypt, tin was also found in daily necessities.
Tin, English name Tin (Stannum), element Sn, metal belonging to the IVA family, atomic number 50, the relative atomic mass of 118.71, a group IVA metal, melting point: 231.89 C, 2260 C, boiling point, density: 7.28g/cm fand. Tin is a silver white metallic luster of the low melting point of the metal, pure tin soft, good at room temperature, good chemical stability, not easy to be oxidized, often keep the silver shiny luster. The content of tin in the crust is 0.004%, almost all in cassiterite (SnO2) form, in addition to a very small amount of tin sulfide ore. As one of "hardware" (gold, silver, copper, iron, tin), as early as the 2000 BC, tin has begun to be used by humans. At present, mainly used in the manufacture of tin solder, tin plate, alloy, chemical products, products are widely used in electronics, electrical appliances, information, chemical industry, metallurgy, building materials, food packaging, machinery, atomic energy and aerospace industry and other industries.
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Where there is good clarithromycin

Clarithromycin (Limaixian) is a macrolide antibiotic, a new generation of semi synthetic, combined with bacterial cells 50S ribosomal subunit, inhibition of protein synthesis and bacteriostasis to wide, has a strong antimicrobial effect on Gram positive bacteria and Gram-negative bacteria and anaerobic bacteria, is the strongest macrolide antibiotics on the antibacterial activity of Chlamydia and Mycoplasma infection. The activity of clarithromycin against Chlamydia trachomatis in vitro was 7 to 10 times that of erythromycin, which was about 4 times higher than that of doxycycline. The 14 hydroxyl products produced by the metabolism in vivo have biological activity, the antibacterial spectrum is the same as that of clarithromycin, and their antibacterial activity in vivo is greatly improved than that in vitro.
Clarithromycin is a derivative of erythromycin and is suitable for the following infections caused by clarithromycin sensitive bacteria: 1 nasopharyngeal infections: tonsillitis, pharyngitis, sinusitis. 2 lower respiratory tract infection: acute bronchitis, acute exacerbation of chronic bronchitis and pneumonia. 3: skin and soft tissue infections, impetigo, folliculitis, furuncle erysipelas and wound infection. 4 acute otitis media, Mycoplasma pneumoniae pneumonia, Chlamydia trachomatis urethritis and cervicitis. 5 is also used for Legionella infection, or combined with other drugs for the treatment of Mycobacterium avium infection, Helicobacter pylori infection.
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What are the application of ginkgo biloba extract

Ginkgo biloba extract of ginkgo leaf as raw material, adopt the appropriate solvent, extraction of effective components of concentrated products, is the real natural plant extracts. In all kinds of preparations of ginkgo biloba extract as raw material, widely used in medicine, health care products, food additives, functional beverage, cosmetics and other fields. Is the product of modern science and technology development of plant medicine one of the most successful case.

The medicinal value and application of ginkgo biloba extract is extremely broad. Adopted advanced technologies, processes and equipment, through further extraction, separation and purification, the more obvious pharmacological effects, in addition to significant antagonism PAF in vitro, can also in anti-inflammatory, anti-allergic, dilate blood vessels, protection of heart head blood-vessel, improve peripheral blood circulation, reduce serum cholesterol and auxiliary anticancer efficacy, can be widely used in cardiovascular, nervous system disease prevention and health care, etc.

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