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The radioisotope samarium-153 is the active component of the drug samarium (153 Sm) lexidronam (Quadramet), which kills cancer cells in lung cancer, prostate cancer, breast cancer and osteosarcoma. Another isotope, samarium-149 , is a strong neutron absorber and so is added to control rods of nuclear reactors .
Thus, despite its position as one of the so-called rare-earth metals, cerium is actually not rare at all. [46] Cerium content in the soil varies between 2 and 150 ppm, with an average of 50 ppm; seawater contains 1.5 parts per trillion of cerium. [38] Cerium occurs in various minerals, but the most important commercial sources are the minerals ...
Samarium is one of the few lanthanides that form a monoxide, SmO. This lustrous golden-yellow compound was obtained by reducing Sm 2 O 3 with samarium metal at high temperature (1000 °C) and pressure above 50 kbar; lowering the pressure resulted in incomplete reaction. SmO has cubic rock-salt lattice structure.
Some of the bastnäsites contain OH − instead of F − and receive the name of hydroxylbastnasite. Most bastnäsite is bastnäsite-(Ce), and cerium is by far the most common of the rare earths in this class of minerals. Bastnäsite and the phosphate mineral monazite are the two largest sources of cerium and other rare-earth elements.
Cerium(III) sulfate is one of the few salts whose solubility in water decreases with rising temperature. [12] Ceric ammonium nitrate. Due to ligand-to-metal charge transfer, aqueous cerium(IV) ions are orange-yellow. [13] Aqueous cerium(IV) is metastable in water [14] and is a strong oxidizing agent that oxidizes hydrochloric acid to give ...
New tests done by the Environmental Working Group have found 21 oat-based cereals and snack bars popular amongst children to have "troubling levels of glyphosate." The chemical, which is the ...
Samarium lexidronam is supplied as a frozen solution for intravenous use with an activity of 50±5 mCi/mL [4] and a maximum beta energy of 0.808 MeV. [5] Due to the short half-life of the radioisotope, the drug expires 56 hours after the noted calibration time. [4]
Longevity is one potential benefit, but so is a longer "healthspan," which is the period of time a person enjoys good health. “Effects on insulin signaling are likely involved,” Alan says.