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Outcomes fundamental

As indicated in the previous section, the adsorption of a gas by a solid is the outcome of the forces of attraction between the individual molecules of the gas and the atoms or ions composing the solid. These forces have been studied theoretically over a number of decades, and though impressive advances have been made in recent years these remain more in the nature of refinements than of fundamental changes in the ideas themselves. And since. [Pg.3]

Basic Principles of Operation RO and NF are pressure-driven processes where the solvent is forced through the membrane by pressure, and the undesired coproducts frequently pass through the membrane by diffusion. The major processes are rate processes, and the relative rates of solvent and sohite passage determine the quality of the product. The general consensus is that the solution-diffusion mechanism describes the fundamental mechanism of RO membranes, but a minority disagrees. Fortunately, the equations presented below describe the obseiwed phenomena and predict experimental outcomes regardless of mechanism. [Pg.2034]

Numerical simulations are designed to solve, for the material body in question, the system of equations expressing the fundamental laws of physics to which the dynamic response of the body must conform. The detail provided by such first-principles solutions can often be used to develop simplified methods for predicting the outcome of physical processes. These simplified analytic techniques have the virtue of calculational efficiency and are, therefore, preferable to numerical simulations for parameter sensitivity studies. Typically, rather restrictive assumptions are made on the bounds of material response in order to simplify the problem and make it tractable to analytic methods of solution. Thus, analytic methods lack the generality of numerical simulations and care must be taken to apply them only to problems where the assumptions on which they are based will be valid. [Pg.324]

When an analytical method is being developed, the ultimate requirement is to be able to determine the analyte(s) of interest with adequate accuracy and precision at appropriate levels. There are many examples in the literature of methodology that allows this to be achieved being developed without the need to use complex experimental design simply by varying individual factors that are thought to affect the experimental outcome until the best performance has been obtained. This simple approach assumes that the optimum value of any factor remains the same however other factors are varied, i.e. there is no interaction between factors, but the analyst must be aware that this fundamental assumption is not always valid. [Pg.189]

As mentioned earlier, heavy polar diatomic molecules, such as BaF, YbF, T1F, and PbO, are the prime experimental probes for the search of the violation of space inversion symmetry (P) and time reversal invariance (T). The experimental detection of these effects has important consequences [37, 38] for the theory of fundamental interactions or for physics beyond the standard model [39, 40]. For instance, a series of experiments on T1F [41] have already been reported, which provide the tightest limit available on the tensor coupling constant Cj, proton electric dipole moment (EDM) dp, and so on. Experiments on the YbF and BaF molecules are also of fundamental significance for the study of symmetry violation in nature, as these experiments have the potential to detect effects due to the electron EDM de. Accurate theoretical calculations are also absolutely necessary to interpret these ongoing (and perhaps forthcoming) experimental outcomes. For example, knowledge of the effective electric field E (characterized by Wd) on the unpaired electron is required to link the experimentally determined P,T-odd frequency shift with the electron s EDM de in the ground (X2X /2) state of YbF and BaF. [Pg.253]

Naturally selectivity in a several-component system is primarily influenced by rather strong effects such as the presence or absence of strong H-bonding, but possibly also by much weaker interactions (e.g. of C—H... O type). In this regard, it is interesting to note the similarity between the selectivity exerted by such simple inclusion hosts, e.g. /, and chiral recognition 103). In both cases, weak interactions are of decisive importance in the final outcome of the experiments. Entropic effects have been demonstrated to play a fundamental role in enzymatic reactions 102,107 >. Conceptual similarity of inclusion compounds to more complicated associates is underlined thereby. [Pg.127]

There are two (count them two) more very critical developments that come from this partitioning of sums of squares. First, the correlation coefficient is not just an arbitrarily chosen computation (or even concept), but as we have seen bears a close and fundamental relationship to the whole ANOVA concept, which is itself a very fundamental statistical operation that data is subject to. As we have seen here, all these quantities - standard deviation, correlation coefficient, and the whole process of decomposing a set of data into its component parts - are very closely related to each other, because they all represent various outcomes obtained from the fundamental process of partitioning the sums of squares. [Pg.479]

In this chapter we describe experimental studies on the ring expansion reactions of phenylcarbene and phenylnitrene and the calculations that have been performed in order to try to explain the experimental results. Our aim is to show how theory can rationalize these observations and can also serve to stimulate additional experiments by predicting their outcome. We will attempt to demonstrate that an understanding of the fundamental differences between the electronic structures of phenylcarbene and phenylnitrene can explain the many differences in the chemistry of these reactive intermediates. [Pg.206]

At one time considered as two distinct reactions occurring by different mechanisms [51], the fragmentations of Scheme 2 and the rearrangments of Scheme 5 are now seen as different facets of the same fundamental heterolysis of -substituted alkyl radicals into alkene radical cations, with the eventual outcome determined by the reaction conditions [52],... [Pg.16]

All geneticists are agreed that what is inherited by organisms from their forebears is a range of capacities to respond to a range of environments. The characteristics that an organism possesses are fundamentally the outcome of the interaction of heredity and environment. If we state that characteristics are inherited, we make a false implication that environment had nothing to do with their production. This is never the case. [Pg.26]

When developing methods for QC, it has been demonstrated that a suitable pre-run rinse step is fundamental to guarantee a consistent performance. The proposed pre-run capillary rinse routine has shown to result in robust and reliable CE methods that can withstand the requirements of a QC lab. Because of many different variables affecting the outcome of a CE method, it is recommended to apply DOE approaches as much as possible during... [Pg.93]

It can play one of two roles. First, as an end in itself or as an alternative or adjunct to profitability and shareholder equity, or, second, as an intermediate objective leading to one of these more fundamental outcomes. If we examine the first of these alternatives we see a range of theories that have subordinated profitability to other variables as primary outcomes. For example, research in the economic theory of commercial banking modifies the basic economic goal of profitability to include a superordinate need for liquidity (Cooper, 1949), and Margolis (1958) argues that the context of uncertainty in which business activities are conducted will lead so-called deliberative firms to utilize criteria that they believe will lead to profitability in this... [Pg.89]


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See also in sourсe #XX -- [ Pg.159 ]




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