| Fr | 1. Symbol for francium. 2. <abbreviation> French scale. (05 Mar 2000) |
|---|---|
| fra 1 | Fos related antigen 1. Related to fos. (18 Nov 1997) |
| Fraccaro, M | <person> Italian physician. See: Schmid-Fraccaro syndrome. (05 Mar 2000) |
| fracid | Rotten from being too ripe; overripe. Origin: L. Fracidus mellow, soft. Source: Websters Dictionary (01 Mar 1998) |
| FRACP | <abbreviation> Fellow of the Royal Australasian College of Physicians. (05 Mar 2000) |
| fractals | Patterns (real or mathematical) which look similar at different scales, for example the network of airways in the lung which shows similar branching patterns at progressively higher magnifications. Natural fractals are self-similar across a finite range of scales while mathematical fractals are the same across an infinite range. Many natural, including biological, structures are fractal (or fractal-like). Fractals are related to "chaos" (see nonlinear dynamics) in that chaotic processes can produce fractal structures in nature, and appropriate representations of chaotic processes usually reveal self-similarity over time. (12 Dec 1998) |
| fraction | In chemistry, one of the separable constituents of a substance. (18 Nov 1997) |
| fraction collector | A device used to collect the eluate from a column in column chromatography. (05 Mar 2000) |
| fraction I protein | <protein> See ribulose bisphosphate carboxylase/oxidase RUBISCO). (18 Nov 1997) |
| fractional | 1. Of or pertaining to fractions or a fraction; constituting a fraction; as, fractional numbers. 2. Relatively small; inconsiderable; insignificant; as, a fractional part of the population. <chemistry> Fractional crystallization, a process of distillation so conducted that a mixture of liquids, differing considerably from each other in their boiling points, can be separated into its constituents. Source: Websters Dictionary (01 Mar 1998) |
| fractional condensation | A lab technique used to separate the components of a vapor containing a mixture of substances. This is done by taking advantage of the fact that the different chemicals have different boiling points. The mixture undergoes repeated condensations, where the chemical with the highest boiling point condenses out of the vapor first and can be separated from the rest, then the chemical with the next highest boiling point condenses out, etc. (09 Oct 1997) |
| fractional distillation | Distillation of a compound liquid at varying degrees of heat whereby the components of different boiling points are collected separately. (05 Mar 2000) |
| fractional dose | A definite fraction of a full dose; given repeatedly at short intervals so that the full dose is taken within a specified period, usually one day. Synonym: fractional dose. (05 Mar 2000) |
| fractional epidural anaesthesia | Insertion of a catheter into the lumbar or caudal epidural space for the repeated injection of local anaesthetic solutions as a means of prolonging duration of anaesthesia. Synonym: fractional epidural anaesthesia. (05 Mar 2000) |
| fractional spinal anaesthesia | Insertion of a catheter into the spinal subarachnoid space and leaving it in situ to permit serial intermittent injection of local anaesthetic solution for prolonged spinal anaesthesia. Synonym: fractional spinal anaesthesia. (05 Mar 2000) |