| RNS | reference normal serum; repetitive nerve stimulation; ribonuclease |
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| RPSP | reference preparation for serum proteins |
| Rst | in paper or thin layer chromatography, the distance that a spot of a substance has moved, relative t... |
| SRM | spontaneous rupture of membranes; Standard Reference Material; superior rectus muscle |
| VDRT | venereal disease reference test |
| thiocyanogen value | The number of grams of thiocyanogen taken up by 100 g of fat; analogous to the iodine number, except that thiocyanogen will not add to all the double bonds in polyunsaturated fatty acids as will iodine. Synonym: thiocyanogen value. (05 Mar 2000) |
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| threshold limit value | The maximum concentration of a chemical recommended by the American Conference of Government Industrial Hygienists for repeated exposure without adverse health effects on workers. (05 Mar 2000) |
| economic value of life | The evaluation of the monetary value of a life lost or a life saved. (12 Dec 1998) |
| law of initial value | The direction of response of a body function to any agent depends to a large degree on the initial level of that function. Synonym: law of initial value. (05 Mar 2000) |
| lower heating value | (LHV) The potential energy in a fuel if the water vapour from combustion of hydrogen is not condensed. (05 Dec 1998) |