| homologous series | A series of organic compounds, the succeeding members of which differ from each other by the radical CH2 (as in the fatty series). (05 Mar 2000) |
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| aromatic series | All the compounds derived from benzene, or similar cyclic compounds that obey Huckel's rule, distinguished from those compounds that are acyclic or that contain rings that lack the conjugated double bond structure characteristic of benzene. (05 Mar 2000) |
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| granulocytic series | <haematology> The cells in the several stages of development in the bone marrow leading to the mature granulocyte of the circulation, e.g., myeloblasts, different stages of the myelocyte, granulocytes. (05 Mar 2000) |
| myeloid series | The granulocytic and the erythrocytic series. (05 Mar 2000) |
| Hofmeister series | <chemistry> The series of cations Magnesium, Calcium, Sr2+, Ba2+, Li+, Na+, K+, Rb+, Cs+, and of anions citrate3-, tartrate2-, SO42-, acetate-, NO3-, CIO3-, I-, CNS- (among others). Each series is arranged in order of decreasing ability to: 1) precipitate the dispersed substance of lyophilic soltions; 2) "salt out" organic substances (e.g., aniline, ethyl acetate) from aqueous solutions; or 3) inhibit the swelling of gels. These effects, among other related ones, are ascribable to the abstraction and binding of water by these ions (i.e., hydration), which also decreases in the orders given, so that (in the monovalent cation series) Li+, with the smallest crystal radius, has the largest hydrated radius, and vice versa for Cs+. Synonym: lyotropic series. (05 Mar 2000) |
| homologous | Corresponding in structure, position, origin, etc., such as the feathers of a bird and the scales of a fish, the antigen and its specific antibody, the allelic chromosomes. Compare: analogous. Origin: Gr. Homologos = agreeing, correspondent (18 Nov 1997) |
| homologous antigen | <immunology> A homologous antigen is one which will attract and react with a specific antibody. (09 Oct 1997) |
| homologous antiserum | An antiserum in which there is complete correspondence between the content of antibodies and the antigenic material used for producing the antiserum. (05 Mar 2000) |
| homologous chromosome | <genetics> A pair of chromosomes containing the same linear gene sequences, each derived from one parent. The chromosomes tend to pair or synapse during mitosis. (14 Oct 1997) |
| homologous chromosomes | A pair of chromosomes containing the same gene sequences, each derived from one parent. (12 Dec 1998) |
| homologous desensitization | Loss of sensitivity only to the class of agonist used to desensitise the tissue. (05 Mar 2000) |
| homologous graft | <haematology> Grafts between two or more individuals allogeneic at one or more loci (usually with reference to histocompatibility loci). As opposed to autograft and xenograft. (18 Nov 1997) |
| homologous proteins | <molecular biology> Proteins that look similar and work in similar ways in different species. (09 Oct 1997) |
| homologous recombination | <molecular biology> Genetic recombination involving exchange of homologous loci. Important technique in the generation of null alleles (knockouts) in transgenic mice. (18 Nov 1997) |
| homologous serotype | An antibody that was induced by a particular antigen and reacts with that antigen. (05 Mar 2000) |
| homologous serum jaundice | An obsolete term for viral hepatitis type B. (05 Mar 2000) |