clonal selection


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Related to clonal selection: clonal expansion

clonal selection

1. The process by which T lymphocytes with receptors that react to autoantigens are destroyed in the thymus.
2. The increase of particular B or T lymphocyte clones after recognition of a specific antigen to which the body has been exposed.
See: negative selection; clone
See also: selection

clonal selection

The production by an antigen of an expanding CLONE of lymphocytes from a single cell bearing a receptor complementary to the antigen.
References in periodicals archive ?
The clonal selection algorithm is then applied to the new population.
Podolsky, The Generation of Diversity: Clonal Selection Theory and the Rise of Molecular Immunology (Cambridge, MA: Harvard University Press, 1997).
Clonal Selection is based on the way in which both B-cells and T-cells adapt in order to match and kill the foreign cells [11].
To implement the clonal selection algorithm and develop the upgrade plan, operations and resource limitations are introduced as antibodies.
This two-volume proceedings set gathers together papers addressing a very wide range of theories, methodologies, and applications, including, for example, studies of the design of a microcomputer control system for a step motor, modeling fleet planning strategy, a virtual simulation system for a tunnel boring machine, using semantic web for information retrieval based on clonal selection strategy, and an image retrieval algorithm based on color segment and shape moment invariants, among many other topics.
X' + C) * PRECOMP n/a UTED * C for C_SVC, EPSILON_SVR and NU_SVR * degree For Poly Kernels * gamma For Poly/RBF/Sigmoid kernels * cofe0 For Poly/Sigmoid * epsilon Stopping criteria Table 2: Parameters initialization values and randomization ranges Parameter value Description Maximum Generation 25 Number of AIS iterations Population Size 50 Number of Antibodies/iteration Best N 5 Number of antibodies selected for Clonal selection Meta Dynamics 10 Number of randomly added antibodies Num Clones 2 Maximum number of clones/antibody Table 3: Parameters initialization values and randomization ranges Parameter Initialization value Mutation value/ranges svm_type Random One of SVMLIBM SVMs types Kernel_type Random POLY/RBF/LINER/SIGMOID C Random [0.
They have a modern winery, were the first to develop drip irrigation and have experimented widely with clonal selection.
When used for clonal selection assessment, the ECM can evaluate cup quality during the early stages of a selection program.
This suggests that methylation does not increase with age, but that depletion of stem cells, clonal selection, or the appearance of clonal hematopoiesis might occur with age.
The wines are crafted separately in small lots to reveal the distinctive terroir derived from the site's diverse elevation, row orientation, exposure, soil type and clonal selection.
With the region's ideal climate and the exceptional clonal selection planted on the estate vineyard, the winemaking philosophy is simply to reflect the natural characteristics of this remarkable estate.
With the ideal climate of the region and the exceptional clonal selection planted on the estate vineyard, the winemaking philosophy is to simply reflect the natural characteristics of this remarkable estate.