strontium


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Related to strontium: strontium 90, Strontium ranelate

strontium

 [stron´she-um]
a chemical element, atomic number 38, atomic weight 87.62, symbol Sr. (See Appendix 6.)
strontium 89 a radioactive isotope of strontium having a half-life of 50.55 days and decaying by beta emission. It is used in the form of the chloride as a radiation source in the palliative treatment of bone pain in patients with metastatic bone lesions.

stron·ti·um (Sr),

(stron'shē-ŭm),
A metallic element, atomic no. 38, atomic wt. 87.62; one of the alkaline earth series and similar to calcium in chemical and biologic properties. Various salts of strontium are used therapeutically for their anions; for example, strontium bromide, iodide, lactate.
[Strontian, a town in Scotland]

strontium

/stron·ti·um/ (stron´she-um) a chemical element, at. no. 38, symbol Sr.
strontium 89  a radioactive isotope of strontium having a half-life of 50.55 days and decaying by beta emission; used in the form of the chloride as a radiation source in palliation of bone pain caused by metastatic lesions.

strontium (Sr)

[stron′sh(ē)əm]
Etymology: Strontian, Scotland
a metallic element. Its atomic number is 38; its atomic mass is 87.62. Chemically similar to calcium, it is found in bone tissue. Isotopes of strontium are used in radioisotope scanning procedures of bone. Strontium 85 (85Sr) and strontium 87 (87Sr) mimic calcium metabolism and are used in studies of bone physiological characteristics and disorders. These radionuclides can be counted with any standard detector or imaged at a very early stage in bone disease, whereas radiographic films of bone without the use of a radioactive tracer can show decreased density only after approximately 50% of bone is decalcified. Most 85Sr or 87Sr is deposited in bone within 1 hour after injection. Increased deposition of these radionuclides is strongly linked to osteoblastic activity and new bone formation. In addition to four naturally occurring isotopes (88Sr, 87Sr, 86Sr, and 84Sr), 12 artificial strontium isotopes are produced by nuclear reactions. Strontium 90, the longest-lived, is the most dangerous constituent of fallout from atomic bomb tests. It can replace some of the calcium in food, become concentrated in teeth and bones, and continue to emit electrons that can cause death in the host. Strontium 90 becomes concentrated in cow's milk.

stron·ti·um

(Sr) (stron'shē-ŭm)
A metallic element; atomic no. 38, atomic wt. 87.62; one of the alkaline earth series and similar to calcium in chemical and biologic properties. Various salts of strontium are used therapeutically for their anions, e.g., strontium bromide, iodide, lactate.
[Strontian, a town in Scotland]

stron·ti·um

(Sr) (stron'shē-ŭm)
A metallic element; one of the alkaline earth series and similar to calcium in chemical and biologic properties.
[Strontian, a town in Scotland]

strontium (Sr) (stron´chēəm),

n a metallic element. Its atomic number is 38 and its atomic weight is 87.62. It is chemically similar to calcium and is found in bone tissue. Isotopes of strontium are used in radioisotope scanning procedures of bone.

strontium

a chemical element, atomic number 38, atomic weight 87.62, symbol Sr. See Table 6.

strontium-90
is deposited in bones and removed with great difficulty. It has a very long half-life (28.1 years) and if sufficient is ingested it will have the same toxic and teratogenic effects as external irradiation. S-90 plates are used in the treatment of superficial squamous cell carcinomas involving the eye.
strontium chloride
experimental feeding to pigs causes gross bone abnormality and weakness and paralysis.
References in periodicals archive ?
Le ranelate de strontium presente-t-il des effets indesirables?
Sonuc: Postmenopozal osteoporoz tanisi konan kadinlarin strontium ranelat ile tedavisi ilk alti aydan baslayarak agriyi azaltabilir ve kemik mineral yogunlugunu artirabilir.
With strontium ranelate you reduce bone resorption by 20%-25%, and you increase bone formation by 20%-25%, so you bring the bone back to what you see in younger women.
Most commonly, strontium isotopes in dental enamel are measured in conjunction with oxygen isotopes ([sup.
For strontium isotope analysis of grapes, a homogenised blend of grape skins, flesh, and seeds was oven-dried then combusted at 550[degrees]C.
Strontium MD David Barker added: "We are delighted to welcome Julie to EDC.
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Problems in processing arise because strontium aluminate "is as hard as tungsten and abrades screws and barrels," Ampacet explains.
Ortolani presented a prespecified subgroup analysis drawn from two large phase III multinational placebo-controlled randomized trials of strontium ranelate for the reduction of fracture risk in osteoporotic postmenopausal women.
Barium sulfate, commonly used as a radio-opaque filler in medical plastics, has now been precipitated in nano-sized particles of 10 to 50 microns by Solvay Barium Strontium GmbH in Hannover, Germany.
Strontium is very dense, so it has been hard to integrate into plastics and other materials, according to the manufacturer.
Health officials did not test for Strontium 90 (Sr-90), a radioactive carcinogenic byproduct of nuclear fission.