| NYHA | New York Heart Association Heart Disease¿¡ ´ëÇÑ Functional Classification &nbs... |
|---|---|
| dpdt | double-pole double-throw [switch] |
| dpst | double-pole single-throw [switch] |
| SCS | Saethre-Chotzen syndrome; shared computer system; silicon-controlled switch; Society of Clinical Sur... |
| BGC | basal ganglion calcification; blood group class |
| CSR | class switch recombination |
|---|---|
| ASO | Arterial switch operation |
| S | switch |
| CIITA | Class II TransActivator |
| FC | Functional Class |
| class switch | Change in the isotype of antibody produced after a B-cell has encountered an antigen. (05 Mar 2000) |
|---|---|
| arterial switch operation | Operation for complete transposition of the great arteries; the most common way to repair this defect consists of switching the aorta and pulmonary arteries and implanting the coronary arteries into the neoaorta (the original pulmonary artery). (05 Mar 2000) |
| genes, switch | Genes that cause the epigenotype (i.e., the interrelated developmental pathways through which the adult organism is realised) to switch to an alternate cell lineage-related pathway. Switch complexes control the expression of normal functional development as well as oncogenic transformation. (12 Dec 1998) |
| gene switch | <molecular biology> A situation in which a cell or organism stops expressing one gene orgene group and switches to expressing a different gene or group of genes. (09 Oct 1997) |
| switch | 1. To strike with a switch or small flexible rod; to whip. 2. To swing or whisk; as, to switch a cane. 3. To trim, as, a hedge. 4. To turn from one railway track to another; to transfer by a switch; generally with off, from, etc.; as, to switch off a train; to switch a car from one track to another. 5. To shift to another circuit. Origin: Switched; Switching. 1. A small, flexible twig or rod. "Mauritania, on the fifth medal, leads a horse with something like a thread; in her other hand she holds a switch." (Addison) 2. A movable part of a rail; or of opposite rails, for transferring cars from one track to another. 3. A separate mass or trees of hair, or of some substance (at jute) made to resemble hair, worn on the head by women. 4. A mechanical device for shifting an electric current to another circuit. Safety switch, an arrangement of tracks whereby elevations otherwise insurmountable are passed. The track ascends by a series of zigzags, the engine running alternately forward and back, until the summit is reached. <physics> Switch board, a collection of switches in one piece of apparatus, so arranged that a number of circuits may be connected or combined in any desired manner. Switch grass. <botany> See Grass. Origin: Cf. OD. Swick a scourage, a whip. Cf. Swink, Swing. Source: Websters Dictionary (01 Mar 1998) |
| switch region | <molecular biology> The nucleotide sequences in heavy chain immunoglobulin genes located in the introns at the 5' end of each CH locus concerned with DNA recombination events that lead to changes in the type of heavy chain produced by a B-cell, for example IgM to IgG switching. These regions are highly conserved sequences. See: isotype switching. (19 Jan 1998) |
| immunoglobulin switch region | Site on a segment of a B-cell immunoglobulin heavy-chain gene where recombination or rearrangement can occur, expressed as isotype or allotype switching, maturation of immune response, or recombination of DNA molecules. It is found on genes encoding all five immunoglobulin heavy chains. (12 Dec 1998) |
| q-switch | <radiobiology> Optical switch used to rapidly change the Q of an optical resonator, utilised in the optical resonator of a laser to prevent lasing action until a high level of gain and energy storage are achieved in the laser medium. When the switch is triggered and rapidly increases the Q of the cavity, a stronger laser pulse is generated. See: oscillator. (09 Oct 1997) |
| age-class | <ecology> A group of individuals of a species that have the same age. (09 Oct 1997) |
| malocclusion, angle class I | Malocclusion in which the mandible and maxilla are anteroposteriorly normal as reflected by the relationship of the first permanent molar (i.e., in neutroclusion), but in which individual teeth are abnormally related to each other. (12 Dec 1998) |
| malocclusion, angle class II | Malocclusion in which the mandible is posterior to the maxilla as reflected by the relationship of the first permanent molar (distoclusion). (12 Dec 1998) |
| malocclusion, angle class III | Malocclusion in which the mandible is anterior to the maxilla as reflected by the first relationship of the first permanent molar (mesioclusion). (12 Dec 1998) |
| genes, MHC class I | Genetic loci in the vertebrate major histocompatibility complex which encode polymorphic characteristics not related to immune responsiveness or complement activity, e.g., b loci (chicken), dla (dog), gpla (guinea pig), h-2 (mouse), rt-1 (rat), HLA-a, -b, and -c class I genes of man. (12 Dec 1998) |
| genes, MHC class II | Genetic loci in the vertebrate major histocompatibility complex that encode polymorphic products which control the immune response to specific antigens. The genes are found in the HLA-d region in humans and in the I region in mice. (12 Dec 1998) |
| MHC class II protein | <protein> The antigen-presenting molecule found primarily on macrophages and B lymphocytes. (09 Oct 1997) |
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