- Industry: Government
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United States Department of Health and Human Services, Radiation Emergency Medical Management
The proportion of a population expected to get a disease over a specified time period. See also risk, relative risk.
Industry:Medical devices
The amount of energy deposited by ionizing radiation in a unit mass of tissue. It is expressed in units of joule per kilogram (j/kg), and called “gray” (gy). For more information, see “primer on radiation measurement” from cdc.
Industry:Medical devices
The property of certain nuclides of emitting radiation by spontaneous transformation of their nuclei. Various units of (radio)activity have been used including curie (1 ci = 3.7 x 1010 disintegrations per second) and becquerel ( 1 bq = 1 disintegration per second). (mettler fa jr, upton ac: medical effects of ionizing radiation, 3rd ed. Philadelphia, pa: saunders elsevier, 2008, page 552)
Industry:Medical devices
An exposure to radiation that occurred in a matter of minutes rather than in longer, continuing exposure over a period of time. See also chronic exposure, exposure, fractionated exposure.
Industry:Medical devices
The acute radiation syndrome (ars) is also known as radiation sickness. A person exposed to radiation will develop ars only if the radiation dose was high, penetrating (e.g., x-rays or gamma rays), encompassed most or all of the body, and was received in a short period of time. Clinical severity of the four subsyndromes of ars (hematopoietic, cutaneous, gastrointestinal, and neurovascular) will vary with dose and host factors (e.g., young or old age, immunosuppression, and medical co-morbidity--especially extensive trauma and burns).
Industry:Medical devices
(image) the nucleus of a helium atom, made up of two neutrons and two protons with a charge of +2. Certain radioactive nuclei emit alpha particles. Alpha particles generally carry more energy than gamma rays or beta particles, and deposit that energy very quickly while passing through tissue. Alpha particles can be stopped by a thin layer of light material, such as a sheet of paper, and cannot penetrate the outer, dead layer of skin. Therefore, they do not damage living tissue when outside the body. When alpha-emitting atoms are inhaled or swallowed, however, they are especially damaging because they transfer relatively large amounts of ionizing energy to living cells. See also beta particles, gamma rays, neutron, x-ray.
Industry:Medical devices
Means making every reasonable effort to maintain exposures to ionizing radiation as far below the dose limits as practical. This is a key principle in radiation protection and safety.
Industry:Medical devices
Panik yapmaya bir kişi neden olabilir bir aşırı, irrasyonel, korku bir şey. Örümcekler, uçak, asansörler, yükseklikleri, kapalı Odalar, kalabalık kamu yerleri ve utanç verici kendini diğer insanların önünde uçan korkusu ortak fobiler örnekleridir.
Industry:Health care
Bezleri ve yapmak kan ve doku ve organları vücudun her yerinde seyahat içine doğrudan serbest hormonlar hücrelerin bir sistem. Endokrin sistem kontrolleri büyüme, cinsel gelişme, uyku ve açlık ve gıda vücut yolu kullanır.
Industry:Health care
Fosforik asit, fosfor içeren bir form. Vücutta, kemik ve dişleri fosfatlar bulunur. Fosfat, kalsiyum kandaki yüksek düzeyde tedavi etmek için kullanılabilir. Ekleme veya kaldırma fosfat kimyasal gruplar biçimini etkileyebilir proteinler vücutta hareket.
Industry:Health care
