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affinity |
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affinity 1. similarity in structure, form, etc., between different animals, plants, or languages 2. Chem a. the tendency for two substances to combine; chemical attraction b. a measure of the tendency of a chemical reaction to take place expressed in terms of the free energy change. 3. Biology a measure of the degree of interaction between two molecules, such as an antigen and antibody or a hormone and its receptor affinity [ə′fin·əd·ē] (chemistry) The extent to which a substance or functional group can enter into a chemical reaction with a given agent. Also known as chemical affinity. (computer science) A specific relationship between data processing elements that requires one to be used with the other, where a choice might otherwise exist. (immunology) The strength of the attractive forces between an antigen and an antibody. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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The triple bond between a nitrogen molecule's atoms is one of the strongest chemical attractions around. Though they couldn't identify the protein responsible for this phenomenon of chemical attraction, they knew that neural axons responded to a signal from cells in the lower spinal cord of embryonic rats. It's biologically plausible that there should be a chemical attraction between egg and sperm," says Robert Stillman, a reproductive endocrinologist at George Washington University in Washington, D. |
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