| 释义 |
iodine-131
Thesaurus| Noun | 1. | iodine-131 - heavy radioactive isotope of iodine with a half-life of 8 days; used in a sodium salt to diagnose thyroid disease and to treat goiterradioisotope - a radioactive isotope of an element; produced either naturally or artificiallyatomic number 53, I, iodin, iodine - a nonmetallic element belonging to the halogens; used especially in medicine and photography and in dyes; occurs naturally only in combination in small quantities (as in sea water or rocks) |
iodine-131
iodine-131[′ī·ə‚dīn ¦wən¦thərd·ē′wən] (nuclear physics) A radioactive, artificial isotope of iodine, mass number 131; its half-life is 8 days with beta and gamma radiation; used in medical and industrial radioactive tracer work; moderately radiotoxic. iodine-131
iodine-131n. A radioisotope of iodine that emits beta and gamma rays, has a half-life of 8.05 days, and is used as a tracer in thyroid studies and as therapy in hyperthyroidism and thyroid cancer.iodine (i'o-din?, -den?) [Gr. ioeides, violet-colored + -ine] I A nonmetallic chemical element of the halogen group, atomic weight (mass) 126.904, atomic number 53, specific gravity (solid, 20°C) 4.93. It is a black crystalline substance with a melting point of 113.5°C; it boils at 184.4°C, giving off a characteristic violet vapor. Sources of iodine include vegetables, esp. those growing near the seacoast; iodized salt; and seafoods, esp. liver of halibut and cod, or fish liver oils. CAS # 7553-56-2FunctionIodine is part of the hormones triiodothyronine (T3) and thyroxine (T4), and prevents goiter by enabling the thyroid gland to function normally. The amount of iodine in the entire body averages 50 mg, of which 10 to 15 mg is found in the thyroid. The adult daily requirement for iodine is from 100 to 150 µg. Growing children, adolescents, pregnant women, and those under emotional strain need more than this amount of iodine. Deficiency SymptomsIodine deficiency in the diet may lead to simple goiter characterized by thyroid enlargement and hypothyroidism. In young children, this deficiency may result in retardation of physical, sexual, and mental development, a condition called cretinism. iodine-131131I See: radioactive iodineprotein-bound iodine Abbreviation: PBI
Iodine that is attached to serum protein. In the past, thyroid function was tested with a serum measurement of PBI. radioactive iodineAny of the radioactive isotopes of iodine, esp. iodine-131, used in diagnosis and treatment of thyroid disorders and in the treatment of toxic goiter and thyroid carcinoma. See: radioiodinetincture of iodine See: tinctureiodine-131
Related to iodine-131: thallium-201Words related to iodine-131noun heavy radioactive isotope of iodine with a half-life of 8 daysRelated Words- radioisotope
- atomic number 53
- I
- iodin
- iodine
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