| MRBC | monkey red blood cell; mouse red blood cell |
|---|---|
| NRBC | National Rare Blood Club; normal red blood cell; nucleated red blood cell |
| RCC | radiological control center; rape crisis center; ratio of cost to charges; receptor-chemoeffector co... |
| RCF | red cell ferritin; red cell folate; relative centrifugal field/force; ristocetin cofactor |
| SRC | sedimented red cells; sheep red cells |
| 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) |
| Luxol fast blue | Name for a group of closely related copper phthalocyanin dyes used as stains (with PAS, PTAH, haematoxylin, silver nitrate, etc.) for myelin in nerve fibres. (05 Mar 2000) |
| receptors, cytoplasmic and nuclear | Proteins in the cytoplasm or nucleus that specifically bind signalling molecules and trigger changes which influence the behaviour of cells. The major groups are the steroid hormone receptors, which usually are found in the cytoplasm, and the thyroid hormone receptors, which usually are found in the nucleus. Receptors, unlike enzymes, generally do not catalyze chemical changes in their ligands. (12 Dec 1998) |
| Remak's nuclear division | <cell biology> An unusual form of nuclear division, in which the nucleus simply constricts, rather like a cell without chromosome condensation or spindle formation. Partitioning of daughter chromosomes is haphazard. Observed in some Protozoa. (18 Nov 1997) |
| Pelger-Huet nuclear anomaly | Congenital inhibition of lobulation in the nuclei of neutrophilic leukocytes; most cells present band or bilobulate appearance, and only an occasional cell is trilobed; it is not associated with disease, but may be confused with leukocyte "shift to left"; autosomal dominant inheritance. (05 Mar 2000) |
| ribonucleoproteins, small nuclear | Highly conserved nuclear RNA-protein complexes that function in RNA processing in the nucleus, including pre-mRNA splicing and pre-mRNA 3'-end processing in the nucleoplasm. The u3 snrnp is localised in the nucleolus, where it aligns into base pairs with the 28s rrna precursor in a still unidentified region and functions in pre-rrna processing. The u7 snrnp aligns into base pairs with a conserved sequence in the 3'-end of histone pre-mRNA and is an essential cofactor for the cleavage that creates the mature nonadenylated 3'-end. (12 Dec 1998) |
| RNA, heterogeneous nuclear | Nuclear nonribosomal RNA larger than about 1000 nucleotides, the mass of which is rapidly synthesised and degraded within the cell nucleus. Some heterogeneous nuclear RNA may be a precursor to mRNA. However, the great bulk of total hnrna hybridises with nuclear DNA rather than with mRNA. (12 Dec 1998) |
| RNA, nuclear | RNA molecules found in the nucleus either associated with chromosomes or in the nucleoplasm. (12 Dec 1998) |
| RNA, small nuclear | Short chains of RNA found in the nucleus. Their function is to remove the introns (nontranslated intervening sequences) from mRNA precursors, thereby bringing the two exons (coding segments) together into correct juxtaposition for enzymatic splicing at the correct point. The resulting mRNA is now ready to leave the nucleus. (12 Dec 1998) |
| rod nuclear cell | <pathology> Immature neutrophils released from the bone marrow reserve in response to acute demand. (18 Nov 1997) |