| 영문 | aging, senescence | 한글 | 노화, 늙음 |
|---|---|---|---|
| 설명 | 나이 먹는다는 의미로 사용되기도 하지만 일반적으로는 성장이 완료, 정지되고 그 이후에 일어나는 모든 과정을 가리킨다. 나이를 먹어감에 따라 생체의 여러 가지 기능이 저하되는데, 일반적으로 세포에 색소가 축적되거나 세포자체나 핵이 작아지는 현상이다. 개개의 세포 기능도 저하되고, 세포 내에 색소가 침착되며, 기관은 암갈색을 띤다. 또한 피부는 얇아지고 털주머니도 위축되며, 모발은 색소를 잃고 탈모된다. 현재 많은 학자들은 세포내 DNA가 끊어지거나 끊어진 경우 수복력이 감소하거나, 면역력이 저하하기 때문으로 보고 있다. 노화가 일어나는 것은 세포의 종류에 따라서 크게 다른데 신경세포처럼 태어나서 죽을 때까지 세포분열하지 않는 세포는 노화가 두드러지고 고환이나 골수의 세포처럼 항상 분열하는 세포는 노화현상이 거의 일어나지 않는다. 발병과 죽음의 확률이 높아지지만, 노쇠성 변화와 병적 변화와의 경제는 명확하지 않다. 노쇠를 야기하는 노화의 본질적 원인에 대해서는 아직 정설이 없다. |
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| NIA | National Institute on Aging; nephelometric inhibition assay; niacin; no information available; Nutri... |
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| NCA | National Certification Agency; National Council on Aging; National Council on Alcoholism; neurocircu... |
| INRIA | National Institute for Research in Computers and Automation [France] [Institut National de la Recher... |
| NII | National Information Infrastructure; National Insurance Institute |
| AAA | abdominal aortic aneurysm/aneurysmectomy; acne-associated arthritis; acquired aplastic anemia; acute... |
| NIA | National Institute of Aging |
|---|---|
| ANSI | American National Standard Institute |
| NCI | National Cancer Institute |
| NCI-C | National Cancer Institute of Canada |
| NHLBI | National Heart Lung and Blood Institute |
ascites
| national institute for occupational safety and health | An institute of the centres for disease control and prevention which is responsible for assuring safe and healthful working conditions and for developing standards of safety and health. Research activities are carried out pertinent to these goals. (12 Dec 1998) |
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| national institute of mental health | A component of the national institutes of health concerned with research, overall planning, promoting, and administering mental health programs and research. (12 Dec 1998) |
| aging | The gradual changes in the structure and function of humans and animals that occur with the passage of time, that do not result from disease or other gross accidents, and that eventually lead to the increased probability of death as the person or animal grows older. It does not apply to microorganisms. (12 Dec 1998) |
| aging, premature | Changes in the organism associated with senescence, occurring at an accelerated rate. (12 Dec 1998) |
| American Law Institute formulation | Used in certain jurisdictions to determine criminal responsibility in legal proceedings. See: criminal insanity. (05 Mar 2000) |
| American Law Institute rule | A test of criminal responsibility (1962): "a person is not responsible for criminal conduct if at the time of such conduct as a result of mental disease or defect he lacks substantial capacity either to appreciate the wrongfulness of his conduct or to conform his conduct to the requirements of law." (05 Mar 2000) |
| cell aging | The decrease in the cell's ability to proliferate with the passing of time. Each cell is programmed for a certain number of cell divisions and at the end of that time proliferation halts. The cell enters a quiescent state after which it experiences cell death via the process of apoptosis. (12 Dec 1998) |
| clonal aging | The deterioration in successive generations of a clone; thus paramecia and other simple forms, if allowed to reproduce asexually for a number of generations, invariably undergo deterioration, the characters of each group of descendants progressively departing from those of the original sexually produced ancestor. (05 Mar 2000) |
| skin aging | The process of aging due to changes in the structure and elasticity of the skin over time. It may be a part of physiological aging or it may be due to the effects of ultraviolet radiation, usually through exposure to sunlight. (12 Dec 1998) |
| institute | 1. The act of instituting; institution. "Water sanctified by Christ's institute." 2. That which is instituted, established, or fixed, as a law, habit, or custom. 3. Hence: An elementary and necessary principle; a precept, maxim, or rule, recognised as established and authoritative; usually in the plural, a collection of such principles and precepts; especially, a comprehensive summary of legal principles and decisions; as, the Institutes of Justinian; Coke's Institutes of the Laws of England. Cf. Digest, "They made a sort of institute and digest of anarchy." (Burke) "To make the Stoics' institutes thy own." (Dryden) 4. An institution; a society established for the promotion of learning, art, science, etc.; a college; as, the Institute of Technology; also, a building owned or occupied by such an institute; as, the Cooper Institute. 5. The person to whom an estate is first given by destination or limitation. Institutes of medicine, theoretical medicine; that department of medical science which attempts to account philosophically for the various phenomena of health as well as of disease; physiology applied to the practice of medicine. Origin: L. Institutum: cf. F. Institut. See Institute, &. Source: Websters Dictionary (01 Mar 1998) |
| institute of medicine | Identifies, for study and analysis, important issues and problems that relate to health and medicine. The institute initiates and conducts studies of national policy and planning for health care and health-related education and research; it also responds to requests from the federal government and other agencies for studies and advice. (12 Dec 1998) |
| erythrocyte aging | Senescence of the red blood cell. Lacking the organelles that make protein synthesis possible, the mature erythrocyte is incapable of self-repair, reproduction, and carrying out certain functions performed by other cells. This limits the average life span of an erythrocyte to 120 days. (12 Dec 1998) |
| bibliography, national | A bibliography which lists all the books and other publications published, or distributed in significant quantity, in a particular country. Sometimes the term is used with respect to the new publications published within a specific period, and sometimes with respect to all those published within a lengthy period of many years. It is also used to indicate a bibliogrpaphy of publications about a country (whether written by its nationals or not) and those written in the language of the country as well as those published in it. (12 Dec 1998) |
| national academy of sciences | A united states organization of distinguished scientists and engineers established for the purpose of investigating and reporting upon any subject of art or science as requested by any department of government. The national research council organised by nas serves as the principal operating agency to stimulate and support research. (12 Dec 1998) |
| National Cancer Information Service | <address, organisation> National Cancer Institute, cancer Information Service, office of Cancer Communications, Building 31, Room 10A24, 9000 Rockville Pike, Bethesda, MD 20892 (27 Sep 1997) |
| National Institute on Aging |
Information Center PO Box 8057 Gaithersburg, MD 20898-8057 800-222-2225 (M - F / 9 - 5 EST)
출처: www.geocities.com/HotSprings/8741/define.html
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| National Institute on Aging |
ABBR: NIA. An institute created by Congress in 1974. Under the National Institutes of Health, the NIA conducts and supports biomedical, social, and behavioral research and training related to aging.
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