| impurity control | <radiobiology> Processes which reduce or control the level of impurities in a plasma, and thereby improve its quality. See: wall conditioning. (09 Oct 1997) |
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| quality control | In biotechnology, quality control is essential to ensure purified protein pharmaceuticals are indeed pure and that they are intact and maintain their biological activity. (14 Nov 1997) |
| quality control chart | A chart illustrating the allowable limits of error in laboratory test performance, the limits being a defined deviation from the mean of a control serum, most commonly ±2 SD. See: quality control. (05 Mar 2000) |
| infection control | Programs of disease surveillance, generally within health care facilities, designed to investigate, prevent, and control the spread of infections and their causative microorganisms. (12 Dec 1998) |
| infection control, dental | Efforts to prevent and control the spread of infections within dental health facilities or those involving provision of dental care. (12 Dec 1998) |
| infection control nurse | A registered nurse with additional education in the monitoring and prevention of nosocomial infections in the client population in an agency. Synonym: infection control nurse. (05 Mar 2000) |
| infection control practitioners | Physicians or other qualified individuals responsible for implementing and overseeing the policies and procedures followed by a health care facility to reduce the risk of infection to patients and staff. (12 Dec 1998) |
| insect control | The reduction or regulation of the population of noxious, destructive, or dangerous insects through chemical, biological, or other means. (12 Dec 1998) |
| internal-external control | A general principle that man's attempts to control his personal environment are influenced by internal or external factors. (12 Dec 1998) |
| tick control | Chemical, biological, or medical measures designed to prevent the spread of ticks or the concomitant infestations which result in tick-borne diseases. It includes the veterinary as well as the public health aspects of tick and mite control. (12 Dec 1998) |
| time-varied gain control | In ultrasonography, an increase in receiver gain with time to compensate for loss in echo amplitude with depth, usually due to attenuation. Synonym: attenuation compensation, depth compensation, time compensation gain, time-compensated gain, time-varied gain control, time-varied gain. (05 Mar 2000) |
| tonic control | Nerve impulses that maintain a normal tonus or level of activity in muscle or other effector organs. (05 Mar 2000) |
| topographical control | Those phenomena of cell behaviour in which the shape of the local substrate of the cell affects its behaviour. See: contact guidance. (18 Nov 1997) |
| transcriptional control | <molecular biology> Control of gene expression by controlling the number of RNA transcripts of a region of DNA. A major regulatory mechanism for differential control of protein synthesis in both pro and eukaryotic cells. (18 Nov 1997) |
| translational control | <molecular biology> The control of protein synthesis by regulation of the translation step, for example by selective usage of preformed mRNA or instability of the mRNA. (18 Nov 1997) |