Monday, December 29, 2014

Magnesium absence diseases occur


Symptomatic magnesium absence due to low comestible assimilation in otherwise-healthy humans is aberrant because the kidneys absolute urinary elimination of this mineral . However, frequently low intakes or boundless losses of magnesium due to assertive bloom conditions, abiding alcoholism, and/or the use of assertive medications can advance to magnesium deficiency.
Early signs of magnesium absence cover accident of appetite, nausea, vomiting, fatigue, and weakness. As magnesium absence worsens, numbness, tingling, beef contractions and cramps, seizures, personality changes, aberrant affection rhythms, and coronary spasms can action . Astringent magnesium absence can aftereffect in hypocalcemia or hypokalemia (low serum calcium or potassium levels, respectively) because mineral homeostasis is disrupted.
Groups at Accident of Magnesium Inadequacy
Magnesium blemish can action if intakes abatement beneath the RDA but are aloft the bulk appropriate to anticipate apparent deficiency. The afterward groups are added acceptable than others to be at accident of magnesium blemish because they about absorb bereft amounts or they accept medical ambit (or crop medications) that abate magnesium assimilation from the gut or access losses from the body.
People with gastrointestinal diseases
The abiding diarrhea and fat malabsorption consistent from Crohn's disease, gluten-sensitive enteropathy (celiac disease), and bounded enteritis can advance to magnesium afire over time . Resection or bypass of the baby intestine, abnormally the ileum, about leads to malabsorption and magnesium loss.
People with blazon 2 diabetes
Magnesium deficits and added urinary magnesium elimination can action in humans with insulin attrition and/or blazon 2 diabetes . The magnesium accident appears to be accessory to college concentrations of glucose in the branch that access urine achievement .
People with booze dependence
Magnesium absence is accepted in humans with abiding alcoholism. In these individuals, poor comestible assimilation and comestible status; gastrointestinal problems, including vomiting, diarrhea, and steatorrhea (fatty stools) consistent from pancreatitis; renal dysfunction with antithesis elimination of magnesium into the urine; phosphate depletion; vitamin D deficiency; astute alcoholic ketoacidosis; and hyperaldosteronism accessory to alarmist ache can all accord to decreased magnesium cachet .
Older adults
Older adults accept lower comestible intakes of magnesium than adolescent adults. In addition, magnesium assimilation from the gut decreases and renal magnesium elimination increases with age. Earlier adults are aswell added acceptable to accept abiding diseases or crop medications that adapt magnesium status, which can access their accident of magnesium afire .
from:Magnesium Metal

Wednesday, December 24, 2014

Definition of the Tellurium Element


A brittle, silvery-white brownish aspect usually begin in aggregate with Gold and added metals. If austere in air tellurium has a greenish-blue blaze and forms tellurium dioxide as a result.
Tellurium is artless by baptize or hydrochloric acid, but dissolves in nitric acid. It is produced commercially as a by-product of the electrolytic adorning of Chestnut and acclimated to admixture stainless animate and Lead, in ceramics, and, in the anatomy of bismuth telluride, in thermoelectric devices. The Diminutive Bulk of this aspect is 52 and the Aspect Symbol is Te.
The Backdrop of the Tellurium Element
Name of Aspect : Tellurium
Symbol of Aspect : Te
Atomic Bulk of Tellurium : 52
Atomic Mass: 127.6 amu
Melting Point: 449.5 °C - 722.65 °K
Boiling Point: 989.8 °C - 1262.95 °K
Number of Protons/Electrons in Tellurium : 52
Number of Neutrons in Tellurium : 76
from:Tellurium metal

Monday, December 22, 2014

Copper applications in industry


Copper is usually activate in attributes in affiliation with sulfur. Authentic Copper metal is about produced from a multistage process, alpha with the mining and apperception of low-grade ores absolute Copper sulfide minerals, and followed by admixture and electrolytic adorning to aftermath a authentic Copper cathode. An accretion allotment of Copper is produced from acerbic leaching of breakable ores. Copper is one of the oldest metals anytime acclimated and has been one of the important abstracts in the development of civilization. Because of its properties, abnormally or in combination, of top ductility, malleability, and thermal and electrical conductivity, and its attrition to corrosion, Copper has become a above automated metal, baronial third afterwards adamant and aluminum in agreement of quantities consumed. Electrical uses of copper, including adeptness manual and generation, architecture wiring, telecommunication, and electrical and cyberbanking products, annual for about three abode of absolute Copper use. Architecture architecture is the individual bigger market, followed by electronics and cyberbanking products, transportation, automated machinery, and customer and accepted products. Copper byproducts from accomplishment and anachronistic Copper articles are readily recycled and accord decidedly to Copper supply.
from:Copper Metals

Wednesday, December 17, 2014

Overview of Tellurium


Appearance
A semi-metal usually acquired as a blah powder.
Uses
Tellurium is acclimated in alloys, mostly with chestnut and stainless steel, to advance their machinability. If added to advance it makes it added aggressive to acids and improves its backbone and hardness.
Tellurium has been acclimated to vulcanise rubber, to casting bottle and ceramics, in solar cells, in rewritable CDs and DVDs and as a agitator in oil refining. It can be benumbed with silver, gold, chestnut or tin in semiconductor applications.
Biological role
Tellurium has no accepted biological role. It is actual baneful and teratogenic (disturbs the development of an antecedent or foetus). Workers credible to actual baby quantities of tellurium in the air advance ‘tellurium breath’, which has a garlic-like odour.
Natural abundance
Tellurium is present in the Earth’s band abandoned in about 0.001 locations per million. Tellurium minerals cover calaverite, sylvanite and tellurite. It is aswell begin absolute in nature, but abandoned actual rarely. It is acquired commercially from the anode muds produced during the electrolytic adorning of copper. These accommodate up to about 8% tellurium.
from:Tellurium metal

Monday, December 15, 2014

Precious metal adorning process


Precious metals adorning is a address acclimated to absolve Precious metals. There are several altered methods for adorning Precious metals, but the two capital methods are pyrometallurgy, which involves heating, and hydrometallurgy, which involves abandoning the metals into a solvent. After purification, the metals are bankrupt to complete the adorning process.
Preparing for Precious metals adorning generally involves demography a sample of the metal to be aesthetic and creating an assay. During sampling, the metal is weighed, measured, and broiled into a liquid, and again samples are taken. Usually one sample is retained by the adorning accession and accession is accustomed to the customer. After sampling, an appraisal is run to actuate the exact amounts and concentrations of the Precious metals and algae to be removed.
Once the sample and appraisal are performed the Precious metals adorning action can begin, usually through pyrometallurgy or hydrometallurgy. During pyrometallurgy, the metal is acrimonious and broiled to abstracted the assorted impurities. In some metal processing, a anatomy of gas will be acclimated to balloon through the broiled metal, and either the targeted Precious metals or the algae will oxidize, alteration bendability to acquiesce for removal. In some cases, the algae and the Precious metals cook at decidedly altered temperatures, which allows for simple break by concrete means.
from:Rare Metals

Sunday, December 7, 2014

Overview of Galarubicin hydrochloride


Galarubicin hydrochloride has greater efficacy and less toxicity than dox- orubicin.And toxicity of DA-125 in advanced non-small-cell lung cancer (NSCLC).
Name:Galarubicin hydrochloride
Molecular Weight:670.04781
Molecular Formula:C30H33ClFNO13
CAS: 140637-82-7
Activity and Mechanism:
Antibiotics and Alkaloids, Antineoplastic Antibiotics, Chemical Delivery Systems, DRUG DELIVERY, Drug Delivery Systems, Leukemia Therapy, ONCOLYTIC DRUGS, Anthracyclines

Tuesday, December 2, 2014

about N-methyl-4-piperidone


NAME :N-methyl-4-piperidone
CAS NO.: 1445-73-4
SYNONYMS: 1-Méthyl-4-pipéridone;
1-Methyltetrahydropyridin
MOLECULAR FORMULA :C6H11NO
REFRACTIVE INDEX :1.460 - 1.462
MOLECULAR WEIGHT :113.16
APPEARANCE: yellowish liquid
SOLUBILITY: Miscible
BOILING  POINT :55 - 58 C at 10 mmHg
FLASH POINT : 58 C
Storage: Store at room temperature
N-Methyl-4-piperidone was used to prepare N,N’-dimethylbispidinone by utilizing a double Mannich condensation method.
from:Acridine Raw Material