| SACH | small animal care hospital; solid ankle cushioned heel |
|---|---|
| SAS | sarcoma amplified sequence; self-rating anxiety scale; short arm splint; Sklar Aphasia Scale; sleep ... |
| sm | an small animal |
| TBA | tertiary butylacetate; testosterone-binding affinity; tetrabutylammonium; thiobarbituric acid; to be... |
| WC | ward clerk; water closet; Weber-Christian [syndrome]; wheel chair; white cell; white cell casts; whi... |
| control | In research, control subjects or control procedures permit comparison with experimental results. The first controlled clinical research was probably done in 1875 by the British naval surgeon James Lind who, on board the HMS Salisbury, gave sailors with scurvy either oranges or lemons or cider or vinegar or nutmeg (or another treatment) and after just six days discovered that the citrus-consuming sailors had recovered from scury, until then the scourge of extended sea voyages, while the sailors who had been given the other treatments remained uncured. (12 Dec 1998) |
|---|---|
| control arm | The group of participants in a clinical trial who receive standard treatment or a placebo, against which those receiving the experimental treatment are compared. (09 Oct 1997) |
| control element | Generic term for a region of DNA, such as a promoter or enhancer adjacent to (or within) a gene that allows the regulation of gene expression by the binding of transcription factors. (18 Nov 1997) |
| control experiment | An experiment used to check another, to verify the result, or to demonstrate what would have occurred had the factor under study been omitted. See: control, control animal. (05 Mar 2000) |
| control gene | See: operator gene, regulator gene. (05 Mar 2000) |
| control group | A group of subjects participating in the same experiment as another group of subjects, but which is not exposed to the variable under investigation. See: experimental group. (05 Mar 2000) |
| control limit | A regulatory value applied to the airborne concentration in the workplace of a potentially poisonous substance which is judged to be reasonably practicable for the whole spectrum of work activities and which must not normally be exceeded. (09 Oct 1997) |
| Control of Communicable Diseases in Man | The internationally recognised authoritative manual now in the 15th (1990) edition, published by the American Public Health Association. (05 Mar 2000) |
| control plot | A plot in which no vegetation will be cut and natural succession will occur. A control plot serves as a baseline to compare other treatments (Early, Mid and Late Seral). (05 Dec 1998) |
| control release suture | Eyeless suture with thread attached to needle such that the two separate when tension is applied to the thread. (05 Mar 2000) |
| control syringe | A type of Luer-Lok syringe with thumb and finger rings attached to the proximal end of the barrel and to the tip of the plunger, allowing operation of the syringe with one hand. Synonym: ring syringe. (05 Mar 2000) |
| poison control centres | Facilities which provide information concerning poisons and treatment of poisoning in emergencies. (12 Dec 1998) |
| cost control | The containment, regulation, or restraint of costs. Costs are said to be contained when the value of resources committed to an activity is not considered excessive. This determination is frequently subjective and dependent upon the specific geographic area of the activity being measured. (12 Dec 1998) |
| population control | Includes mechanisms or programs which control the numbers of individuals in a population of humans or animals. (12 Dec 1998) |
| positive control | Mechanism for gene regulation that requires that a regulatory protein must interact with some region of the gene before transcription can be activated. (18 Nov 1997) |