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Values change

If the mean or median provides an estimate of a penny s true mass, then the spread of the individual measurements must provide an estimate of the variability in the masses of individual pennies. Although spread is often defined relative to a specific measure of central tendency, its magnitude is independent of the central value. Changing all... [Pg.55]

Values change with thickness the reported value is for 0.635 cm. [Pg.270]

Product class Value, /kg Volume Value Change from 1982—1991, % ... [Pg.75]

The filaments of all plant fibers consist of several cells. These cells form crystalline microfibrils (cellulose), which are connected together into a complete layer by amorphous lignin and hemi-cellulose. Multiple layers stick together to form multiple layer composites, filaments. A single cell is subdivided into several concentric layers, one primary and three secondary layers. Figure 5 shows a jute cell. The cell walls differ in their composition and in the orientation of the cellulose microfibrils whereby the characteristic values change from one natural fiber to another. [Pg.793]

Perform sensitivity and uncertainty analysis. Calculation of life-cycle costs and net benefits assumes that cash-flow profiles and the value of MARR are reasonably accurate. In most cases, uncertain assumptions and estimates are made in developing cash flow profile forecasts. Sensitivity analysis can be performed by testing how the outcome changes as the assumptions and input values change. [Pg.217]

From a practical perspective, DR (along with neutralization capacity and basicity) is one of the most important functional properties of amines and is always referred to when selecting amines for application in a steam-condensate system. Amine DR values vary considerably, however, and for each amine the DR value changes with variation of temperature and pressure. [Pg.527]

An idea of the scale of turbulence can be obtained by measuring instantaneous values of velocities at two different points within the fluid and examining how the correlation coefficient for the two sets of values changes as the distance between the points is increased. [Pg.702]

Solid-surface fluorescence and phosphorescence quantum yield values were obtained from +23° to -180°C for the anion of p-aminobenzoic acid adsorbed on sodium acetate (11). Fhosphorescence lifetime values were also obtained for the adsorbed anion from +23° to -196°C. Table 1 gives the fluorescence and phosphorescence quantum yield values acquired. The fluorescence quantum yield values remained practically constant as a function of temperature. However, the phosphorescence quantum yield values changed substantially with temperature. The phosphorescence lifetime experiments indicated two decaying components. Each component showed a gradual increase in phosphorescence lifetime with cooler temperatures, but then the increase appeared to level off at the coldest temperatures. [Pg.160]

In general there are few reproducible data on binding of reducible substrates to the isolated MoFe proteins. However, the S = EPR signal from the FeMoco centers of Kpl is pH dependent, the g values changing with a pKa of 8.7 (50). Of course, the proton is a substrate of nitrogenase however, there is no direct evidence for the proton associated with the pKa being bound directly to FeMoco. Nevertheless, this pKa can be perturbed by addition of the analog substrate acety-... [Pg.173]

A wide range of degrees of freedom must be spanned, over which the approximated value changes appreciably. [Pg.329]

The normalization serves to make sensitivities comparable across variables and parameters. In this context, by sensitivity we would mean the proportion of model value change due to a given proportion of parameter change. Abso-... [Pg.86]

By limiting the study to structures for which there are several compounds the average AIT value changes from 651 for substances with two carbon atoms... [Pg.74]

Potentiometry is the measurement of the potential at an electrode or membrane electrode, so the detector response is in units of volts. The potentio-metric response tends to be slow, so potentiometry is used infrequently in analysis.47 One example is the use of a polymeric membrane impregnated with ionophores for the selective detection of potassium, sodium, ammonium, and calcium 48 In process chromatography, potentiometry may be used to monitor selected ions or pH as these values change over the course of the gradient. [Pg.220]

In process chromatography, potentiometry may be used to monitor selected ions or pH, as these values change over the course of the gradient. [Pg.669]

It can be seen from Eq. (3.2.21) that, if the solution contains one of the forms, oxidized or reduced, in zero concentration, then the potential would attain infinite absolute value. These extreme values change to finite values in the presence of a trace of the other form. This always occurs as a result of... [Pg.190]

Yet another situation is observed in the 2,4-dinitrophenyl phosphate dianion. A significant effect of amines on the rate of decomposition is admittedly observed however, typical 2nd order kinetics, lower enthalpy of activation compared with spontaneous hydrolysis, and strongly negative AS values (see Table 3) indicate an Sn2(P) reaction. Surprisingly, the reaction rate remains unaffected by the basicity of the amine, even when its pKa value changes by 8 units. [Pg.98]

The other key assumption that we sort of implied was that the comparison of standard deviation is constant. Of course we know that as n changes, the comparison value changes as the square root of n. This is on top of and in addition to the changes caused by the use of the t rather than the Normal (Z) distribution. [Pg.103]

Secondly, as a measure of nonlinearity, the calculation conforms more closely to that concept than the correlation coefficient does. As a contrast, we can consider terms such as precision and accuracy, where high precision and high accuracy mean data with small values of standard deviation> while low precision and low accuracy mean large values of the measure. Thus, for those two characteristics, the measured value changes in opposition to the concept. If we were to use the correlation coefficient calculation as the measure of nonlinearity, we would have the same situation. However, by defining the linearity calculation the way did, the calculation now runs parallel to the concept a calculated value of zero means no nonlinearity while increasing values of the calculation corresponds to increasing nonlinearity. [Pg.456]

In many applications it is essential to know the rate of change of power. This rate normally increases or decreases exponentially with time. The time constant for this change is referred to as the period. A period of five seconds means that the value changes by a factor of e (2.718) in five seconds. Figure 34 shows a basic period meter circuit. [Pg.85]

In the case of a solution such as electroless Ni-P, Ni2+ is usually complexed by citrate, and the stability constants are ca. 104 and 2 x 108 (overall value) for the ML and ML2 complexes [67], Thus, pM will change relatively slowly with pH. On the other hand, the stability constant for the Pd-EDTA complex system (ML type only) is reported to be 1024 [67], i.e. Pd2+ is strongly complexed by EDTA. The Pd2+ pM value changes drastically, in a practical electroless deposition sense, over a rather narrow pH range. Consequently, in the case of an electroless Pd solution with EDTA as complexant, the solution may go from a condition of near spontaneous plating out to one where deposition virtually ceases. [Pg.262]


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