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2011年6月23日星期四

Uses of Cobalt Sulphate

The industrial uses of cobalt sulfate range from coating and processing metal to adding color to ceramics.The red crystalline powder was also found in human food and drugs at some point, but concerns about the health risks of the mineral led to the banning of the use of cobalt sulfate for nonindustrial and nonveterinary purposes.

The industrial uses of cobalt sulfate

Addition of cobalt sulfate in nickel plating baths makes metals treated better, stronger, more ductile and smoother. The mineral also occurs in shades of red pottery and porcelain glazes and helps to dry and fix the inks on lithographs.

Food and Drug Uses

Brewers when used cobalt sulfate to prolong the life of beer foam, and ranchers were dosed cattle with cobalt sulfate or fertilizer enriched with cobalt sulphate to ensure that their animals get enough oligo-elements needed to produce vitamin B12. Moreover, until recently, cobalt sulfate has a therapeutic role in treating certain forms of anemia.

Health Risks

Look at long-term or repeated exposure to skin and to cobalt sulfate may cause irritation, rash and redness that will fade as the end of such exposures. Inhalation of dust from cobalt sulfate over a prolonged period, which is possible in manufacturing environments where the mineral powder is used, can lead to poisoning and may cause cancer. Eleventh Report on Carcinogens from the National Institute for Environmental Health Sciences identifies cobalt sulfate as probable human carcinogen, but notes that the role of the mineral in cancer is difficult to define because most people who working with cobalt sulfate also work with other heavy metals and cancer causing chemicals.

Cobalt Sulfate Poisoning

Acute poison --- cobalt sulfate inhalation of dust too fast can cause --- cough, nausea, shortness of breath and vomiting, but is not life threatening. Poisoning that results from chronic inhalation of cobalt sulfate causes irreversible blood thickening, enlarged heart (cardiomyopathy), pain and tingling (neuropathy), and thyroid dysfunction.
Regulations

Federal Clean Air Act regulations list cobalt sulfate as a hazardous air pollutant, and companies must report spills and releases of cobalt compounds for federal agencies and local emergency response. In addition, the U.S. Food and Drug Administration banned the use of cobalt sulfate in beverages, foods and medicines for humans.

Uses of Barium Titanate

Barium titanate, BaTiO3, or is composed of one part of barium, a titanium frame and three parts oxygen. The combination of the two metals with oxygen produces a compound with certain qualities. These qualities, which include a positive temperature coefficient and high dielectric properties, barium titanate make useful products in the electronics industry.

Positive temperature coefficient
Compounds with positive temperature coefficients, such as barium titanate have the opportunity to increase their electrical resistance with increasing temperature. This capability, known as positive temperature coefficient of resistivity or PSTN, resulting in a rapid increase in electrical resistance with increasing temperature. The temperature that triggers the increase is known as the switch or Curie temperature. This ability is barium titanate compound valuable to use as a thermostat or an electric heating system checked. RPTC allows the heater to reach a preset temperature without the need for a thermostat.

PTC thermistors
Barium titanate, with PTCR, is good for PTC thermistors. They are used in heating elements, applications against excess current, devices and telecommunications. In most temperatures, the thermistor to maintain a slightly negative temperature coefficient. When the heat reaches the switching temperature, the electrical resistance of barium titanate increases very rapidly until it becomes slightly negative at very high temperatures.

High dielectric property
Dielectric is the ability to isolate or not to conduct electricity. Barium titanate exhibits high dielectric qualities making it a good insulator for industrial purposes, such as in the cells of memory on computer chips. The nanoparticles, or very small particles of the compound, provide the material for these uses. Silicon dioxide is the common material, but according to researchers at IBM, he has nearly reached its storage limit and a new material is needed, one with a high dielectric property.

Capacitors
Capacitors store and release energy quickly and in electronic devices like cell phones. Barium titanate nanoparticles have the potential to double the energy storage due to their high dielectric properties. Other uses include defense applications or any use where storage capacity is important.

Composites
Experiments using barium titanate with tin to form a compound extremely stiff were reported in the September 2007 "Engineer of Wisconsin." These efforts were to develop a new material that has the rigidity of diamonds, but can be used in the manufacture and construction. Part of the research involves broadening the temperature range where the composite is stiff, it would be of value in commercial applications. Potential commercial applications include use as material for bridges, buildings and airplanes. The compound also has a high density of data that would make a good material for computer hard drives.

The uses of pregnancy-associated plasma protein A

The blood is tested for levels of two substances; hCG and pregnancy-associated plasma protein A. The result of this blood test and a detailed ultrasound scan, which measures the thickness at the back of the fetal neck, determines the risk of a birth disorder but does not diagnose a condition.

Pregnancy-associated plasma protein-A (PAPP-A, Insulin-like growth factor binding protein-4 protease, PAPP-A-proMBP complex) is a large heterottetrameric glycoprotein of approximately 500 kDa, which was first discovered in serum from pregnant women. The hetreotetramer consists of two PAPP-A subunits and two proMBP subunits. Low maternal serum levels of PAPP-A in first trimester biochemical screening is used as a marker of Down’s syndrome.

During the first trimester of pregnancy, a health care provider will take blood to determine the current health of the mother and record vital information that may be needed over the course of the pregnancy and delivery. A fetal screening blood test helps identify a pregnancy that may be at risk for serious birth disorders and may also be offered during the first trimester.

Potassium iodide

Potassium iodide is an inorganic compound. It is less hygroscopic than sodium iodide, making it easier to work with. Aged and impure samples are yellow because of oxidation of the iodide to iodine.Potassium iodide is used medicinally in tablets, usually containing 130 mg of KI, or as a "saturated solution of potassium iodide" (SSKI) which in the U.S.P. generic formulation contains 1000 mg of KI per mL (or 500 mg KI in 10 drops, assumed to be 0.5 mL).

Potassium iodide is a supplement that manufacturers advertise as a way to treat an overactive thyroid in lieu of hormone therapies. It is also used to protect the person against the effects of inhaled or ingested radioactive iodine. You can get potassium iodide from numerous sources, but you should speak to your doctor before using the product.

2011年6月14日星期二

Inhibin-A ELISA Kit Uses

Inhibin A is a dimer of subunits alpha and beta A, inhibin B is a dimer of subunits alpha and beta B. Inhibin belongs to women transforming growth factor β-superfamily.In, FSH stimulates the secretion of inhibin by granulosa cells of ovarian follicles in the ovary. In turn, inhibits the secretion of inhibin FSH.Inhibin is decreased by GnRH, and enhanced by insulin-like growth factor-A 1.Inhibin peaked in the mid-luteal phase.
Inhibin-A is elevated in the blood serum of women carrying fetuses with Down syndrome.Inhibin is produced in the gonads, ituitary gland, placenta and men organs.In others it is a hormone that inhibits FSH-production.The inhibin alpha subunit joins either A beta or beta B subunit to form an inhibitor of pituitary FSH secretion.

Squamous cell carcinoma antigen (SCC ) Uses

Squamous cell carcinoma antigen (SCC ) is a glycoprotein of molecular weight ~ 45 kDa, belonging to the family of serine protease inhibitors of cysteine /. The protein was originally isolated by Kato and colleagues from human tissues and squamous cell carcinomas proved to have at least 10 different sub-fractions in isoelectric point. SCC antigen is a serologic marker of squamous cell carcinoma of the cervix, vulva, uterus, lung, head and neck, and esophagus . In case of squamous cell carcinoma of the cervix, serum pre SCC-ag treatment can be used as an early prognostic factors and the use of pretreatment SCC Ag was suggested to select patients at high risk for adjuvant therapy. In addition, for patients with levels high SCC AG before starting treatment, the profile of FA SCC correlates with response to radio-and chemo-therapy and the extent of ag NAC can be used to monitor the effect of treatment and early detection of recurrent disease.

2011年6月13日星期一

Uses of Cobalt Sulphate

The industrial uses of cobalt sulfate range from coating and processing metal to adding color to ceramics.The red crystalline powder was also found in human food and drugs at some point, but concerns about the health risks of the mineral led to the banning of the use of cobalt sulfate for nonindustrial and nonveterinary purposes.

The industrial uses of cobalt sulfate

Addition of cobalt sulfate in nickel plating baths makes metals treated better, stronger, more ductile and smoother. The mineral also occurs in shades of red pottery and porcelain glazes and helps to dry and fix the inks on lithographs.

Food and Drug Uses

Brewers when used cobalt sulfate to prolong the life of beer foam, and ranchers were dosed cattle with cobalt sulfate or fertilizer enriched with cobalt sulphate to ensure that their animals get enough oligo-elements needed to produce vitamin B12. Moreover, until recently, cobalt sulfate has a therapeutic role in treating certain forms of anemia.

Health Risks

Look at long-term or repeated exposure to skin and to cobalt sulfate may cause irritation, rash and redness that will fade as the end of such exposures. Inhalation of dust from cobalt sulfate over a prolonged period, which is possible in manufacturing environments where the mineral powder is used, can lead to poisoning and may cause cancer. Eleventh Report on Carcinogens from the National Institute for Environmental Health Sciences identifies cobalt sulfate as probable human carcinogen, but notes that the role of the mineral in cancer is difficult to define because most people who working with cobalt sulfate also work with other heavy metals and cancer causing chemicals.

Cobalt Sulfate Poisoning

Acute poison --- cobalt sulfate inhalation of dust too fast can cause --- cough, nausea, shortness of breath and vomiting, but is not life threatening. Poisoning that results from chronic inhalation of cobalt sulfate causes irreversible blood thickening, enlarged heart (cardiomyopathy), pain and tingling (neuropathy), and thyroid dysfunction.

Regulations

Federal Clean Air Act regulations list cobalt sulfate as a hazardous air pollutant, and companies must report spills and releases of cobalt compounds for federal agencies and local emergency response. In addition, the U.S. Food and Drug Administration banned the use of cobalt sulfate in beverages, foods and medicines for humans.

Cobalt Oxide Uses

  Cobalt oxide is a chemical compound derived from cobalt blue, a byproduct of metal extraction and processing of copper and nickel. The cobalt oxide powder is in green, red or black or crystal and has many industrial applications and health, although repeated exposure can also cause a high disease.

Pigments

  Cobalt oxide is used to provide color blue for glass, porcelain and enamel tiles and gives a blue tint to enamel steel. It is also a drying agent for paints in oils, varnishes and inks, and is used in sympathetic inks, which are colorless and invisible until they are exposed to chemicals,light or heat.

 Industrial Uses

   The cobalt oxide in the form of lithium cobalt oxide is a chemical essential to the manufacture of rechargeable batteries. It is also used in the manufacture of magnets and used as a catalyst for hydrogen production. It acts as an oxidizing agent in the propane fuel and ammonium fertilizers. Petroleum and petrochemical companies use cobalt oxide to treat raw materials and finished products. Manufacturers of semiconductors use cobalt oxide to fabricate circuit components such as voltage controlled resistors.

 Nutrition

   Animal feed Manufacturers use cobalt oxide to increase the nutritional content. Herbal supplements of cobalt oxide reduce mineral deficiencies in cattle, sheep and horses, and help them absorb and metabolize vitamin B12. The cobalt oxide also contributes to the growth and reproductive development in animals and may prevent swelling of the thyroid gland. In addition to the soil, cobalt oxide infused vegetables, leafy vegetables and other plants with cobalamin, a form of vitamin B12. Cobalamin-rich plants may help vegetarians and other non-meat eaters avoid anemia, heart palpitations and other health problems.

 Dangers of Cobalt Oxide

   Repeated exposure to dust heavy cobalt oxide untreated or fumes can irritate the airways and cause coughing, asthma and lung disease,abdominal pain, nausea, vomiting, rash and ringing in the ears can also result,and patches of red, itchy skin can appear as well. Chronic exposure is linked to kidney, heart and lungs. People who have skin problems, eye conditions or allergies to cobalt should avoid contact with dust from cobalt oxide and vapors. This is a potential cancer causer in humans and can disrupt the reproductive systems.

2011年6月8日星期三

Platinum-Palladium catalyst

Catalysts are to be initiated by Merriam-Webster as substances accelerate, or a chemical reaction without itself defines affected by the reaction. There are a variety of catalysts for chemical reactions. Some catalysts are specific to individual reactions. Others can be disseminated, such as those listed below.
Platinum-palladium catalyst has a high conversion and selectivity of hydrogenation, strong, activity stability, long life, easy recovery recovery, no corrosion, non-pollution etc.Platinum-palladium catalyst in the petroleum, chemical, pharmaceutical, spices and other fine used chemical dye process of hydrogenation.
Palladium and platinum are popular types of chemical catalysts. According to a report of Chemical Technology, both palladium and platinum are used by pharmaceutical companies to require a variety of combinations to create produce medicines and antibiotics. They are useful in catalysts, as they keep the reactants firmly but still allow you to stop the reaction partner to form new compounds.

2011年6月7日星期二

Human myosin heavy chain ELISA

Human myosin heavy chain ELISA is a sandwich enzyme-linked immunosorbent assay solidoid assay (ELISA). A known concentration of standard, unknown concentration of the sample by the addition of micro-ELISA plate for testing. First incubated, and biotin-labeled antibodies at the same time. After washing, addition of avidin-HRP-labeled. Remove after a further incubation and washing unbound enzyme combo, and then adding substrate A, B and enzyme combo traded simultaneously. Produce color. The color depth and concentration of samples was proportional relationship.


Kit Performance: 1 Sensitivity: the minimum detection concentration is less than 1 standard. Linear dilution. The correlation coefficient R-value of the linear regression of the sample and the expected concentration is 0.990.
2.Specific: no reaction with other cytokines.
3. Repeatability coefficient of variation of within-plate was, inter-plate less than 10%.

The human elastin ELISA kit

The human elastin ELISA kit is a test solidoid sandwich enzyme-linked immunosorbent assay (ELISA). A known concentration of the standard, the unknown concentration of the sample by adding micro-ELISA plate for testing. First, incubated, and antibodies labeled with biotin at the same time. After washing, adding the HRP-labeled avidin. After further incubation and washing to remove uncombined enzyme list, then add the substrate A, B, and the enzyme acted simultaneously combo. Produce color. The depth of color and concentration of samples was proportional relationship.

Performance Kit: 1. Sensitivity: the minimum concentration of detection is lower than the standard No. 1. Linear dilution. The correlation coefficient R of the linear regression of the sample and the expected concentration is 0.990.
2.Specific: no reaction with other cytokines.
3. Repeatability coefficient of variation within the plate, inter-plate was less than 10%.