| autoradiograph | Image of the distribution and concentration of radioactivity in a tissue or other substance made by placing a photographic emulsion on the surface of, or in close proximity to, the substance. Synonym: autoradiogram. (05 Mar 2000) |
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| autoradiography | <technique> A specimen containing radioactive atoms is overlaid with a photographic emulsion (X-ray film), which is subsequently developed, revealing the localisation of radioactivity as a pattern of silver grains. Resolution is determined by the path length of the radiation and so the low energy beta emitting isotope, tritium, is usually used. The technique can be used to visualise radioactively labelled molecules or fragments of molecules, used in analyzing length and number of DNA fragments after they are separated by gel electrophoresis. (12 Mar 1998) |
| autoreceptors | Transmitter receptors on or near presynaptic terminals (or varicosities) which are sensitive to the transmitter(s) released by the terminal itself. Receptors for the hormones released by hormone-releasing cells are also included. (12 Dec 1998) |
| autoregulation | <molecular biology> Regulation of a gene encoding a transcription factor by its own gene product: a feedback process. (02 Jan 1998) |
| autoreinfection | 1. Reinfection by microbes or parasitic organisms on or within the body that have already passed through an infective cycle, such as a succession of boils, or a new infective cycle with production of a new generation of larvae and adults, as by the nematode Strongyloides stercoralis or the cestode Hymenolepsis nana. 2. Self-infection by direct contagion as with parasite eggs passed in the infectious state transmitted by fingernails (anal-oral route), as with the pinworm, Enterobius vermicularis. Synonym: autoreinfection, self-infection. (05 Mar 2000) |
| autoreproduction | The ability of a gene or virus, or nucleoprotein molecule generally, to bring about the synthesis of another molecule like itself from smaller molecules within the cell. (05 Mar 2000) |
| autorrhaphy | Wound closure using strands of fascia from the edges of the wound. Origin: auto-+ G. Rhaphe, sewing (05 Mar 2000) |
| autoscopic phenomenon | The encountering of an image of oneself, the image being an illusion, a hallucination, or a vivid fantasy. (05 Mar 2000) |
| autosensitise | To sensitise against one's own body cells. Synonym: isosensitise. (05 Mar 2000) |
| autosepticaemia | Septicaemia apparently originating from microorganisms existing within the individual and not introduced from without. Origin: auto-+ G. Sepsis, decay, + haima, blood (05 Mar 2000) |
| autoserotherapy | The treatment of certain conditions, such as dermatoses, by injection of the patient's own blood serum. Synonym: autotherapy. (05 Mar 2000) |
| autoserum | Serum obtained from the patient's own blood and used in autoserotherapy. (05 Mar 2000) |
| autoserum therapy | Therapy with serum obtained from the patient's own blood. (05 Mar 2000) |
| autosexualism | Synonym: autoerotism. Synonym: narcissism. (05 Mar 2000) |
| autosite | That member of abnormal, unequal conjoined twins that is able to live independently and nourish the other member (parasite) of the pair. Origin: auto-+ G. Sitos, food (05 Mar 2000) |