| ELECTZ | electrosurgical loop excision of the cervical transformation zone |
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| HLT | heart-lung transplantation; human lipotropin; human lymphocyte transformation |
| LETS | large external transformation-sensitive [protein] |
| LLETZ | large loop excision of the transformation zone |
| LTT | lactose tolerance test; leucine tolerance test; limited treadmill test; lymphocyte transformation te... |
| transformation, bacterial | The heritable modification of the properties of a competent bacterium by DNA from another bacterial strain. (12 Dec 1998) |
|---|---|
| transformation constant | <physics, radiobiology> The fraction of the amount of a radionuclide that undergoes transition per unit time. Formally: Lamda=dP/dt Where dP is the probability of a given nucleus undergoing spontaneous nuclear transition in the time interval dt. (16 Dec 1997) |
| transformation efficiency | The number of bacterial cells that uptake and express plasmid DNA divided by the mass of plasmid used (in transformants/microgram). (09 Oct 1997) |
| transformation, genetic | The unidirectional transfer and incorporation of foreign DNA by prokaryotic or eukaryotic cells and the subsequent recombination of part or all of that DNA into the cell's genome. (glossary of genetics: classical and molecular, 5th ed) (12 Dec 1998) |
| transformation zone | Zone on the cervix at which squamous epithelium and columnar epithelium meet; changes location in response to a woman's hormonal status. (05 Mar 2000) |
| fast | 1. Firmly fixed; closely adhering; made firm; not loose, unstable, or easily moved; immovable; as, to make fast the door. "There is an order that keeps things fast." (Burke) 2. Firm against attack; fortified by nature or art; impregnable; strong. "Outlaws . . . Lurking in woods and fast places." (Spenser) 3. Firm in adherence; steadfast; not easily separated or alienated; faithful; as, a fast friend. 4. Permanent; not liable to fade by exposure to air or by washing; durable; lasting; as, fast colours. 5. Tenacious; retentive. "Roses, damask and red, are fast flowers of their smells." (Bacon) 6. Not easily disturbed or broken; deep; sound. "All this while in a most fast sleep." (Shak) 7. Moving rapidly; quick in mition; rapid; swift; as, a fast horse. 8. Given to pleasure seeking; disregardful of restraint; reckless; wild; dissipated; dissolute; as, a fast man; a fast liver. Fast and loose, now cohering, now disjoined; inconstant, especially. In the phrases to play at fast and loose, to play fast and loose, to act with giddy or reckless inconstancy or in a tricky manner; to say one thing and do another "Play fast and loose with faith." . Fast and loose pulleys, to make secure; to fasten firmly, as a vessel, a rope, or a door. Origin: OE, firm, strong, not loose, AS. Fst; akin to OS. Fast, D. Vast, OHG. Fasti, festi, G. Fest, Isel. Fastr, Sw. & Dan. Fast, and perh. To E. Fetter. The sense swift comes from the idea of keeping close to what is pursued; a Scandinavian use. Cf. Fast, adv, Fast, v, Avast. 1. In a fast, fixed, or firmly established manner; fixedly; firmly; immovably. "We will bind thee fast." (Judg. Xv. 13) 2. In a fast or rapid manner; quickly; swiftly; extravagantly; wildly; as, to run fast; to live fast. Fast by, or Fast beside, close or near to; near at hand. "He, after Eve seduced, unminded slunk Into the wood fast by." (Milton) "Fast by the throne obsequious Fame resides." (Pope) Origin: OE. Faste firmly, strongly, quickly, AS. Faste. See Fast. Source: Websters Dictionary (01 Mar 1998) |
| fast component | <molecular biology> A segment of eukaryotic DNA consisting of highly-repeated nucleotide sequences which, when the entire duplex DNA molecule is denatured (the double-stranded helix comes apart and becomes single strands) and then allowed to renature (the complementary single strands come together to form a helix), will be the first segment to renature. (09 Oct 1997) |
| fast green FCF | An acid arylmethane dye widely used in histology and cytology and less subject to fading than light green FCF which it has replaced in many procedures; used as a quantitative cytochemical stain for histones at alkaline pH after acid extraction of DNA, and also in electrophoresis as a protein stain. (05 Mar 2000) |
| fast neutron | <physics> Neutron with energy greater than roughly 100,000 electron volts (100 keV). Distinguished from slow or thermal neutrons. (09 Oct 1997) |
| fast neutrons | Neutrons, the energy of which exceeds some arbitrary level, usually around one million electron volts. (12 Dec 1998) |
| fast pyrolysis | Thermal conversion of biomass by rapid heating to between 450> To 600>C in the absence of oxygen. (05 Dec 1998) |
| fast ray | <microscopy> The fast ray or fast component for a crystal or fibre corresponds to the lower refractive index. (05 Aug 1998) |
| fast smear | A cytologic smear containing material from the vaginal pool and pancervical scrapings, mixed and prepared on one microscopic slide, smeared, and fixed immediately; used principally for routine screening of ovaries, endometrium, cervix, vagina, and hormonal states. (05 Mar 2000) |
| Kluver-Barrera Luxol fast blue stain | <technique> In combination with cresyl violet, a stain useful for demonstrating myelin and Nissl substance. (05 Mar 2000) |
| liquid-metal fast-breeder reactor | <physics> Fission breeder reactor concept using liquid-metal coolant and breeding additional fuel off fast neutrons. See: breeder reactor. (09 Oct 1997) |