phosphorus

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phosphorus

 (P) [fos´for-us]
a chemical element, atomic number 15, atomic weight 30.974. (See Appendix 6.) Phosphorus is an essential element in the diet; in the form of phosphates it is a major component of the mineral phase of bone and is involved in almost all metabolic processes. It also plays an important role in cell metabolism. It is obtained by the body from milk products, cereals, meat, and fish, and its use by the body is controlled by vitamin D and calcium.

Free phosphorus is very inflammable and exceedingly poisonous; ingestion causes fatty degeneration of the liver and other viscera. Inhalation of its vapor by workers in chemical industries may cause necrosis of the mandible (phosphonecrosis). adj., adj phosphor´ous.
phosphorus 32 a radioisotope of phosphorus having a half-life of 14.28 days and emitting only beta particles, used as a radiopharmaceutical. As the sodium salt its therapeutic uses include treatment of polycythemia vera, chronic granulocytic leukemia, chronic lymphocytic leukemia, and palliation of metastatic skeletal disease. As a colloid with chromium its uses include treatment of certain ovarian and prostate carcinomas and of intraperitoneal and intrapleural malignant effusions resulting from metatstatic disease. Symbol 32P.

phos·pho·rus (P),

(fos'fō-rŭs), Do not confuse this word with phosphorous.
A nonmetallic chemical element, atomic no. 15, atomic wt. 30.973762, occurring extensively in nature, always in compounds such as phosphates and phosphites and as the phosphate in every living cell; the elemental form is extremely poisonous, causing intense inflammation and fatty degeneration; repeated inhalation of phosphorus fumes may cause necrosis of the jaw (phosphonecrosis); the approximate fatal dose is 50-100 mg.
[G. phosphoros, fr. phōs, light, + phoros, bearing]

phosphorus

A nonmetallic element (atomic number 15, atomic weight 30.97) which is a principal intracellular anion. Phosphorus plays key roles in biochemical synthesis, storage and use of energy in cells through the formation of high-energy phosphate bonds; it is intimately linked to the regulation of calcium levels, carbohydrate, lipid and acid-base metabolism. Phosphorus is essential to bone and tooth formation; 85% of the body’s phosphorus and phosphates are stored in bone.

Dietary source
Dairy, fish, legumes, meats, nuts, poultry, whole grains.

Phosphorus

Homeopathy
A homeopathic remedy formulated from phosphorus used for anaemia, circulatory defects, fatigue, gastrointestinal (nausea due to food poisoning) and respiratory (asthma, bronchitis, pneumonia) tract complaints, burning chest pains, gastritis, haemorrhage, insomnia, menstrual dysfunction, nasal polyps, nosebleeds and tension.

phos·pho·rus

(fos'fŏr-ŭs)
A nonmetallic chemical element, atomic no. 15, atomic wt. 30.973762, occurring extensively in nature, always in chemical combination; the elemental form is extremely poisonous, causing intense inflammation and fatty degeneration; repeated inhalation of phosphorus fumes may cause necrosis of the jaw (phosphonecrosis).
[G. phosphoros, fr. phōs, light, + phoros, bearing]

phos·pho·rus

(fos'fŏr-ŭs)
A nonmetallic chemical element, occurring extensively in nature; the elemental form is extremely poisonous, causing intense inflammation and fatty degeneration; repeated inhalation of phosphorus fumes may cause necrosis of the jaw (phosphonecrosis).
[G. phosphoros, fr. phōs, light, + phoros, bearing]
References in periodicals archive ?
The concentrations of the phosphorus compounds corresponded to 0.08 wt% of phosphorus.
The concentrations of the investigated Zn, Cr, Cu and Ni transition metals were found to depend on phosphorus compounds with different statistical correlations (Figs 3-6).
There was no significant MRS peaks of phosphorus compounds (ATP, PME, PDE and Pi) in solution containing HepG-2 cells when added into the 2mL ATP solution mentioned above.
For example, phosphorus compounds are most soluble between pH 6.5 to 6.8.
Gains will be concentrated in brominated and phosphorus compounds and in more specialized antimony oxide and magnesium hydroxide formulations, while alumina trihydrate (the largest volume product) records less rapid growth.
Nutrients added to the bed neutralize acidic degradation while providing the nitrogen and phosphorus compounds needed for microbial growth.
There is, however, another dimension to contend with in wastewater effluents - the presence of nutrients, composed of nitrogen and phosphorus compounds. Ordinary solids removal techniques seldom lower the concentrations of nitrogen and phosphorus to acceptable levels.
By including certain boron or phosphorus compounds in the gas, the researchers were able to lay down both the p- and n-type diamond layers on silicon, Okano says.
Analogous conclusions have been reached from studies of the reactions of various o- and p-quinones with SnX.sub.2, and more recently with phosphorus compounds. If the generality of such reaction mechanisms can be established, there is a real prospect of describing Main Group redox reactions in a completely new light.
The biological purification process will be carried out in activated sludge reactors in sbr technology with cyclical inflow and outflow of sewage, Installation of simultaneous precipitation of phosphorus compounds and final filtration of biologically treated sewage.
The most used phosphorus compounds in EP for EE application include red phosphorus [5], melamine polyphosphate [6], aromatic phosphates such as triphenyl phosphate [7], dihydrooxa-phosphaphenantrene, and its derivatives [8, 9], as well as metal phosphinates [10-12].
Bjorkman K, Karl DM (1994) Bioavailability of inorganic and organic phosphorus compounds to natural assemblages of microorganisms in Hawaiian coastal waters.