| SDT | sensory detection theory; right sacrotransverse [fetal position] [Lat. sacrodextra transversa]; sign... |
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| EPSEM | equal probability of selection method |
| ISIS | image selected in vivo spectroscopy; imaging science and information system; information system-imag... |
| SERS | Stimulus Evaluation/Response Selection [test] |
| DOI | date of injury; died of injuries; diffusion of innovations [theory] |
| MAS | Marker Assisted Selection |
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| DFT | Density Functional Theory |
| IRT | Item Response Theory |
| SDT | Signal Detection Theory |
| TOM | Theory of Mind |
| clonal selection theory | A theory which states that each lymphocyte has membrane bound immunoglobulin receptors specific for a particular antigen and once the receptor is engaged, proliferation of the cell occurs such that a clone of antibody producing cells (plasma cell) is produced. (05 Mar 2000) |
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| clonal selection | <cell biology> The process whereby one or more clones, i.e. Cells expressing a particular gene sequence are selected by naturally occurring processes from a mixed population. Generally the clonal selection is for general expansion by mitosis, particularly with reference to B lymphocytes where selection with subsequent expansion of clones occurs as a result of antigenic stimulation only of those lymphocytes bearing the appropriate receptors. (18 Nov 1997) |
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| clonal deletion theory | The elimination of certain T-cell populations in the thymus that have receptors for self-antigens. See: immunologic tolerance. (05 Mar 2000) |
| clonal | Pertaining to a clone. (05 Mar 2000) |
| 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) |
| clonal anergy | Functional inactivation of t- or B-lymphocytes rendering them incapable of eliciting an immune response to antigen. This occurs through different mechanisms in the two kinds of lymphocytes and can contribute to self tolerance. (12 Dec 1998) |
| clonal deletion | The removal of B-cell and T-cell varieties which recognise parts of the organisms body as targets of the immune system. This process naturally occurs early in the organisms development so that the organism will not be autoimmune (having an immune reaction against one's own body tissues) later in life. (09 Oct 1997) |
| clonal expansion | Production of daughter cells all arising originally from a single cell. (05 Mar 2000) |
| artificial selection | <genetics> The selective breeding by humans towards a desired trait in a plant, animal, or other organism which is of value (usually economic) to the humans. The process operates on the same principles as natural selection. (09 Oct 1997) |
| balancing selection | <genetics> A process of natural selection where heterozygous individuals are more adaptive, and thus selected for more often, than either of the two types of homozygous individuals. (09 Oct 1997) |
| blue white colour selection | <molecular biology, procedure> Method for identifying bacterial clones containing plasmids with inserts. Many modern vectors have their polycloning site within a part of the LacZ gene encoding _ galactosidase, which provides _ complementation in an appropriate mutant E. Coli strain. This means that a re ligated (empty) vector will produce blue colonies when grown on plates containing IPTG and X gal, but colonies with a substantial insert in their plasmid's polycloning site are unable to produce functional _ galactosidase and so produce white colonies. (16 Dec 1997) |
| patient selection | Criteria and standards used for the determination of the appropriateness of the inclusion of patients with specific conditions in proposed treatment plans and the criteria used for the inclusion of subjects in various clinical trials and other research protocols. (12 Dec 1998) |
| medical selection | Preservation, by medical care and treatment, of individuals of pathologic genotypes who would not otherwise reproduce, thus tending to increase the frequency of pathologic genes in the population; conversely, reduction of the frequency of pathologic genes by preventing reproduction of individuals of specified genotype by surgical sterilization or other means. (05 Mar 2000) |
| personnel selection | The process of choosing employees for specific types of employment. The concept includes recruitment. (12 Dec 1998) |
| mitotic cell selection | A drug-free procedure for the selection of mitotic cells from an exponentially growing monolayer. (09 Oct 1997) |
| selection | <biology> Placing organisms under conditions where the growth of those with a particular genotype will be favored. (09 Oct 1997) |
| clonal selection theory of immunity |
The theory that precursor cell lines for lymphocytes are made up of innumerable clones with identical antigen receptors. The clones capable of reacting with ¡°self¡± components (i.e., the individual's own cells)
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