Some Complicating Factors

However, most of this work has avoided consideration of some complicating factors, arising especially from the limited thickness and real structure of anodic dielectric films. The latter causes the following effects ... 

What on the surface appears to be an attractive method may, on closer analysis, turn out to have some serious flaws. As seemingly straight forward as many of these approaches appear, when reduced to practice it is not unlikely—in fact even probable —that some complicating factors will be encountered. A certain amount of commitment is needed, and even then one is reminded that what one wants to do does not always match what is practical to do. 

There are some complicating factors, notably temperature. Stearic acid vapor reacts with activated aluminum oxide to form an aluminum stearate which is tenaciously retained by the adsorbent. On raising the temperature of the system, the desorbed material is not stearic acid but decarboxylated, cracked olefinic hydrocarbons. 

These general rules are also likely to be valid for the surfactant self-assembly strnc-tures at surfaces. There are, however, some complicating factors due to the presence of the surface. First, the surface might induce a preferred structure, and second, the surface might partake in the formation of self-assembled structures, and hence there are counterions from the surface to take into account. An example of the first case, where the surface induces a preferred self-assembly structure at the interface, is shown... 

Both LC-ETIR and LC-NMR can be applied in combination with solvent gradients. In both cases there are some complicating factors. In the case of FTIR, only solvent elimination interfaces can realistically be used. This implies that the effluent from the LC is sprayed into a (heated) evaporation chamber and that the nonvolatile analyte polymers are deposited on a suitable substrate (for example, a germanium disc). By moving the spray or the substrate, the entire chromatogram can be recorded. Some authors have programmed the deposition conditions to obtain optimal results for gradient elution LC-FTIR. However, as was mentioned ear-... 

Some Complicating Factors 6.2.8.1. Non-linear Stimulus Transfer... 

Literature A number of informative researches can be cited, but again the difficulties of experimentation and complicating factors have made the kinetic patterns difficult to generalize. The most investigated gas reactants have been oxygen and hydrogen and some chlorine systems. 

Generally it was found that resolution R is practically the same for isoeluotropic mixtures methanol and acetonitrile with water. The dependencies were obtained between capacity factors for derivatives of 3-chloro-l,4-naphtoquinone at their retention with methanol and acetonitrile. Previous prediction of RP-HPLC behaviour of the compounds was made by ChromDream softwai e. Some complications ai e observed at weak acetonitrile eluent with 40 % w content when for some substances the existence of peak bifurcation. 

However, DR, volatility, and some other factors are also important points to consider in the selection of volatile oxygen scavengers (VOSs). And to further complicate matters, at least one common VOS... 

The discussion of interatomic distances is less simple for intermetallic compounds than for pure metals among the complicating factors are the partial ionic character of bonds, the transfer of electrons, with consequent changes in valency, and the preferential use of the valencies of an atom in the formation of strong bonds rather than weaker ones. These factors, which of course participate in minimizing the energy of the system, usually operate to decrease the interatomic distances. Then-effects may be illustrated by some examples. 

Risk factors for NSAID-induced peptic ulcers and complications are presented in Table 15-2. Several important principles should be considered when estimating the risk for developing PUD in a patient taking an NSAID (1) risk factors are generally additive (2) some risk factors (e.g., corticosteroid therapy) are not by themselves a risk factor for ulceration but increase PUD risk substantially when combined with NSAID therapy and (3) many of the risk factors postulated to increase PUD... 

A further complicating factor with rubber compounds is that some compounding ingredients, e g., 2-mercaptobenzothiazole, will accelerate and increase the sulphur blooming. 

Describe some of the limiting or complicating factors involved in using ISE electrodes in making measurements on soil or soil extracts. 

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