Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Temperature roots

Room temperature. Root-mean-square displacement (< v2 >0 5) in pm by brownian motion over one hour. Sedimentation rate in pm per hour, assuming the particles to differ in density from water by 100 kg nr3... [Pg.317]

Deriving the Ideal Gas Lauu The Meaning of Temperature Root Mean Square Velocity... [Pg.180]

Whether this is more than a convenient parameterization is debatable. The stretched exponential in eq. (35) has no direct relation to stretched exponential relaxation of bulk magnetization (see Campbell et al. 1994). As will be discussed in sect. 8 the only clear-cut case is the highly dilute spin glass. It was shown by Uemura et al. (1984) that above the glass transition temperature root-exponential relaxation occurs, that is p = 0.5. That... [Pg.101]

Barnes and Hunter [290] have measured the evaporation resistance across octadecanol monolayers as a function of temperature to test the appropriateness of several models. The experimental results agreed with three theories the energy barrier theory, the density fluctuation theory, and the accessible area theory. A plot of the resistance times the square root of the temperature against the area per molecule should collapse the data for all temperatures and pressures as shown in Fig. IV-25. A similar temperature study on octadecylurea monolayers showed agreement with only the accessible area model [291]. [Pg.148]

Fig. IV-25. The evaporation resistance multiplied by the square root of temperature versus area per molecule for monolayers of octadecanol on water illustrating agreement with the accessible area model. (From Ref. 290.)... Fig. IV-25. The evaporation resistance multiplied by the square root of temperature versus area per molecule for monolayers of octadecanol on water illustrating agreement with the accessible area model. (From Ref. 290.)...
The Debye-Htickel limiting law predicts a square-root dependence on the ionic strength/= MTLcz of the logarithm of the mean activity coefficient (log y ), tire heat of dilution (E /VI) and the excess volume it is considered to be an exact expression for the behaviour of an electrolyte at infinite dilution. Some experimental results for the activity coefficients and heats of dilution are shown in figure A2.3.11 for aqueous solutions of NaCl and ZnSO at 25°C the results are typical of the observations for 1-1 (e.g.NaCl) and 2-2 (e.g. ZnSO ) aqueous electrolyte solutions at this temperature. [Pg.488]

As in tire case of themial conductivity, we see that the viscosity is independent of the density at low densities, and grows witli the square root of the gas temperature. This latter prediction is modified by a more systematic calculation based upon the Boltzmaim equation, but the independence of viscosity on density remains valid in the Boltzmaim equation approach as well. [Pg.675]

A typical molecular dynamics simulation comprises an equflibration and a production phase. The former is necessary, as the name imphes, to ensure that the system is in equilibrium before data acquisition starts. It is useful to check the time evolution of several simulation parameters such as temperature (which is directly connected to the kinetic energy), potential energy, total energy, density (when periodic boundary conditions with constant pressure are apphed), and their root-mean-square deviations. Having these and other variables constant at the end of the equilibration phase is the prerequisite for the statistically meaningful sampling of data in the following production phase. [Pg.369]

When the density Is sufficiently low that the pressure difference Is proportional to density, then the ratio of the absolute pressures on the two sides of the plate Is equal to the square root of Che ratio of tha absolute temperatures. [Pg.178]

It should be noted that a number of different enzyme preparations can now be purchased directly from manufacturing chemists. It must be emphasised that the activity of an enzyme, whether purchased or prepared in the laboratory, may vary between rather wide limits. The activity is dependent on the source of the enzyme, the presence of poisons and also on the temperature. It appears, for example, that the quality of horseradish peroxidase depends upon the season of the year at which the root is obtained from the ground. It cannot be expected therefore that all the experiments described below will work always with the precision characteristic of an organic reaction proceeding under accurately known conditions. [Pg.510]

Graham s Law of Diffusion. The rates at which gases diffuse under the same conditions of temperature and pressure are inverseiy proportionai to the square roots of their densities ... [Pg.530]

The values for unit weight of solvent (molality scale) can be obtained by multiplying the corresponding values for unit volume by the square root of the density of water at the appropriate temperature. [Pg.832]

Increases in broth viscosity significantly reduce k a and cause bubble size distributions to become bimodal (30). Overall, k a decreases approximately as the square root of the apparent broth viscosity (31). k a can also be related to temperature by the relationship (32)... [Pg.333]

Lupine seed, though used primarily in animal feeds (see Feeds AND FEED ADDITIVES), does have potential for use in human appHcations as a replacement for soy flour, and is reported to contain both trypsin inhibitors and hemagglutenins (17). The former are heat labile at 90°C for 8 minutes the latter seem much more stable to normal cooking temperatures. Various tropical root crops, including yam, cassava, and taro, are also known to contain both trypsin and chymotrypsin inhibitors, and certain varieties of sweet potatoes may also be impHcated (18). [Pg.476]

The exposure interval for the bed, T, is inversely proportional to the kiln rotation rate. Hence, equation 21 shows that the time constant for desorption is directly proportional to the bed depth and inversely proportional to the square root of the kiln rotation rate. However, the overriding factor affecting is the isotherm constant iC which in general decreases exponentially with increasing temperature as in equation 4. [Pg.51]


See other pages where Temperature roots is mentioned: [Pg.703]    [Pg.890]    [Pg.77]    [Pg.703]    [Pg.890]    [Pg.77]    [Pg.148]    [Pg.76]    [Pg.669]    [Pg.673]    [Pg.77]    [Pg.51]    [Pg.187]    [Pg.189]    [Pg.353]    [Pg.121]    [Pg.77]    [Pg.829]    [Pg.531]    [Pg.531]    [Pg.164]    [Pg.401]    [Pg.567]    [Pg.213]    [Pg.243]    [Pg.301]    [Pg.455]    [Pg.113]    [Pg.340]    [Pg.28]    [Pg.353]    [Pg.24]    [Pg.24]    [Pg.220]    [Pg.238]    [Pg.345]    [Pg.488]    [Pg.224]   
See also in sourсe #XX -- [ Pg.34 ]




SEARCH



© 2024 chempedia.info