| 영문 | gamma ray | 한글 | 감마선 |
|---|---|---|---|
| 설명 | 감마-붕괴로 인해 원자핵 안으로부터 방사되는 전자방사선. 같은 전자방사선인 X선과는 원자핵 밖의 현상으로 인해 발생되는 점으로 구별한다. 질량, 전하를 가지고 있지 않기 때문에 물질과의 상호작용은 알파선이나 베타선과 비교하여 매우 적으며 투과성이 매우 크다. 물질과의 상호작용은 X선의 그것과 본질적으로 차이가 없으며 에너지에 따라 톰슨산란, 광전효과, 콤튼산란, 전자쌍 생성, 광핵반응 등이 일어난다. 의료에 이용되는 것은 방사선 치료에서 60Co에 의한 외조사 또는 192Ir, 226Ra, 198Au 등으로부터의 감마선이 사용되고 감마-카메라를 사용한 핵의학 검사에서는 99mTc 등으로부터의 감마선에 의한 신티그램이 진단에 이용되고 있다. |
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| 영문 | beta ray | 한글 | 베타선 |
|---|---|---|---|
| 설명 | 방사성 원자핵이 β붕괴함에 따라 방출되는 방사선. 원자에 정상보다 많거나 적은 중성자나 양자를 가지고 있는 경우에는 원자가 안정되기 위하여 붕괴가 세가지 방법으로 생긴다. 이중 중성자가 하나의 전자를 내고 양성자가 되는 변화를 거치면서 나오는 전자선이다. 그 실체는 고속의 전자 또는 양전자이며 최대 에너지는 105-107eV. 투과력 및 이온화 작용은 α선과 γ선의 중간 정도이다. |
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| 영문 | infrared ray | 한글 | 적외선 |
|---|---|---|---|
| 설명 | 파장이 가시광선보다 길며 극초단파보다 짧은 750μm~1mm의 전자파. 눈으로는 볼 수 없고 일반적으로 공기 가운데에서 산란되기 어려우며, 가시광선보다 투과력이 강하다. 사진 적외선-근적외선-원적외선 따위로 나눌 수 있는데, 단파장 부분에는 사진 작용-형광 작용-광전 작용이 있어, 적외선 사진이나 적외선 통신-물질 감정-의료 따위에 이용한다. 1800년에 허셀이 발견되었다. 적외선은 물질에 부딛치며 구성분자의 열운동을 일으켜서 열효과를 주게되므로 열선이라고도 불린다. 태양광선의 약 52%는 적외선이다. 700~800nm의 적외선은 인체피부를 투과해서 피하에까지 이른다. 과도의 적외선 조사는 피부에 온열성홍반을 일으키게 해서 화상을 일으킬 수 있다. |
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| ABCDES | abnormal alignment, bones-periarticular osteoporosis, cartilage-joint space loss, deformities, margi... |
|---|---|
| PIXE | particle-induced x-ray emission; proton-induced x-ray emission |
| ATN | acute tubular necrosis; augmented transition network |
| DOUBTFUL | double quantum transition for finding unresolved lines |
| GNTP | Graduate Nurse Transition Program |
| EMT | Epithelial-mesenchymal transition |
|---|---|
| MBT | Mid-Blastula-Transition |
| MPT | Mitochondrial Permeability Transition |
| T(g) | The glass transition temperature |
| TP1 | Transition protein 1 |
| cervicothoracic transition | The junction between the last cervical vertebra and first thoracic vertebra. (05 Mar 2000) |
|---|---|
| health transition | Demographic and epidemiologic changes that have occurred in the last five decades in many developing countries and that are characterised by major growth in the number and proportion of middle-aged and elderly persons and in the frequency of the diseases that occur in these age groups. The health transition is the result of efforts to improve maternal and child health via primary care and outreach services and such efforts have been responsible for a decrease in the birth rate; reduced maternal mortality; improved preventive services; reduced infant mortality, and the increased life expectancy that defines the transition. (12 Dec 1998) |
| helix-coil transition | <molecular biology> A change in the structure of a nucleic acid or protein molecule from a highly ordered, complex structure to a random, chaotic structure. Also means that the protein or nucleic acid becomes denatured. (09 Oct 1997) |
| isomeric transition | The transition of a nuclear isomer to a lower quantum state; e.g., 131mXe → 131Xe + g. (05 Mar 2000) |
| transition | 1. Passage from one place or state to another; charge; as, the transition of the weather from hot to cold. "There is no death, what seems so is transition." (Longfellow) 2. A direct or indirect passing from one key to another; a modulation. 3. A passing from one subject to another. "[He] with transition sweet, new speech resumes." (Milton) 4. <biology> Change from one form to another. This word is sometimes pronounced; but according to Walker, Smart, and most other authorities, the customary and preferable pronunciation is, although this latter mode violates analogy. Other authorities say . <geology> Transition rocks, a term formerly applied to the lowest uncrystalline stratified rocks (graywacke) supposed to contain no fossils, and so called because thought to have been formed when the earth was passing from an uninhabitable to a habitable state. Origin: L. Transitio: cf. F. Transition. See Transient. Source: Websters Dictionary (01 Mar 1998) |
| transition electron | An electron that moves from one energy level to another to fill a vacancy in a shell, with the emission of characteristic radiation. (05 Mar 2000) |
| transition mutation | A point mutation involving substitution of one base-pair for another, i.e., replacement of one purine for another and of one pyrimidine for another pyrimidine without change in the purine-pyrimidine orientation. (05 Mar 2000) |
| transition probability model | A model to account for the apparently random variation in cell cycle time between individual animal tissue cells in culture that postulates that transition from G1 to s phase is probabilistic. Contrasts with hypotheses that require the accumulation of critical levels of particular proteins. (18 Nov 1997) |
| transition protein | <molecular biology> In spermatogenesis, group of proteins that displace histones from nuclear DNA and that are in turn displaced by protamines to produce the transcriptionally inactive nuclear DNA characteristic of the sperm nucleus. (18 Nov 1997) |
| transition state | The activated state of a molecule that has partly undergone a chemicalreaction. (09 Oct 1997) |
| transition state intermediate | In a chemical reaction, an unstable and high-energy configuration assumed by reactants on the way to making products. Enzymes are thought to bindand stabilise the transition state, thus lowering the energy of activation needed to drive the reaction to completion. (09 Oct 1997) |
| transition temperature | <chemistry> The temperature at which there is a transition in the organisation of, for example: the phospholipids of a membrane where the transition temperature marks the shift from fluid to more crystalline. Usually determined by using an Arrhenius plot of activity against the reciprocal of absolute temperature, the transition temperature being that temperature at which there is an abrupt change in the slope of the plot. In membranes such phase transitions tend to be inhibited by the presence of cholesterol. (18 Nov 1997) |
| actinic ray | A light ray toward and beyond the violet end of the spectrum that acts upon a photographic plate and produces other chemical effects. Synonym: chemical ray. (05 Mar 2000) |
| alpha ray | <physics> A radioactive particle made up of two protons and two neutrons, these particles are created by the decay of a radioactive material or by nuclear bombardment, and they are the same as the nucleus of a helium-4 atom. (09 Oct 1997) |
| ap, X-ray | An X-ray picture in which the beams pass from front-to-back (anteroposterior). As opposed to a PA (posteroanterior) film in which the rays pass through the body from back-to-front. (12 Dec 1998) |
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|
제품명 |
판매사 |
보험코드 | 성분/함량 | 구분/보험급여 |
|---|