| Henry's law | at equilibrium, at a given temperature, the amount of gas dissolved in a given volume of liquid is directly proportional to the partial pressure of that gas in the gas phase (this only holds for gases that do not react chemically with the solvent). (05 Mar 2000) |
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| Hess' law | The amount of heat generated by a reaction is the same whether the reaction takes place in one step or several steps; i.e., dH values (and thus dG values) are additive. (05 Mar 2000) |
| hess's law | <chemistry> In going from a particular set of reactants to a particular set of products, the enthalpy change is the same whether the reaction takes place in one step or a series of steps, in other words, enthalpy is a state function. (09 Jan 1998) |
| Schutz' law | The rate of an enzyme reaction is proportional to the square root of the enzyme concentration; applied specifically to pepsin within a limited range. Synonym: Schutz' law. (05 Mar 2000) |
| Proust's law | The relative weights of the several elements forming a chemical compound are invariable. Synonym: Proust's law. (05 Mar 2000) |
| Hilton's law | The nerve supplying a joint supplies also the muscles which move the joint and the skin covering the articular insertion of those muscles. (05 Mar 2000) |
| second law of thermodynamics | <physics> All of the chemical and physical processes in a closed system tend to drive that system toward maximum entropy. Clausius statement: No device can operate in a cycle and allow heat to transfer from a colder body to a hotter body unless other compensating activities are taking place. Kelvin-Planck statement: no device can operate in a constant-temperature cycle and convert the heat it receives into work, unless other other compensating activities are taking place. (09 Oct 1997) |
| Hooke's law | The stress applied to stretch or compress a body is proportional to the strain, or change in length thus produced, so long as the limit of elasticity of the body is not exceeded. (05 Mar 2000) |
| Semon's law | An obsolete law stating that injury to the recurrent laryngeal nerve results in paralysis of the abductor muscle of the vocal cords before paralysis of the adductor muscles. (05 Mar 2000) |
| Sherrington's law | Every dorsal spinal nerve root supplies a particular area of the skin, the dermatome, which is, however, invaded above and below by fibres from the adjacent spinal segments. (05 Mar 2000) |
| Snell's law | For two given media, the sine of the angle of incidence bears a constant relation to the sine of the angle of refraction. Synonym: Descartes' law, Snell's law. (05 Mar 2000) |
| Spallanzani's law | The younger the individual the greater is the regenerative power of its cells. (05 Mar 2000) |
| Nasse's law | An early statement of the pattern of X-linked recessive inheritance: haemophilia affects only boys but is transmitted through mothers and sisters. (05 Mar 2000) |
| Starling's law | The energy liberated by the heart when it contracts is a function of the length of its muscle fibres at the end of diastole. Synonym: Starling's law. (05 Mar 2000) |
| Stokes' law | A muscle lying above an inflamed mucous or serous membrane is frequently the seat of paralysis, a relationship of the rate of fall of a small sphere in a viscous fluid; applicable to centrifugation of macromolecules, the wavelength of light emitted by a fluorescent material is longer than that of the radiation used to excite the fluorescence. (05 Mar 2000) |