Quantitative agreement, temperature influence

The kinetic model used to simulate the reaction and poisoning process appears to be adequate for the experiments performed. However, the influence exerted by small temperature upsets after each cycle may necessitate a more detailed simulation of heat tranfer effects if more quantitative agreement with experiment is required. 

The major problem with dta stems from the difficulty of obtaining a uniform temperature throughout the sample. For this reason, there is rarely quantitative agreement between the results of different workers. The peak shape and area on the thermogram are affected by non-uniformity of furnace temperature, rate of heating, sample geometry, particle size, and dilution with inert material. In many instances, the atmosphere above the sample also influences the reaction. 

In the hole theory the spinodal is not solely determined by the mass average molar mass. This statement is in qualitative agreement with experimental facts. Especially, the observed temperature shift is reproduced quite well. However, quantitative agreement with experimental spinodal data has not been achieved yet. It still remains to be evaluated which moments of the molar mass distribution determine the spinodal conditions in the hole theory. For Flory-Huggins like models, it can be proven that spinodal conditions are determined only by the mass average molar mass [16-18]. The hole theory behaves quite differently and new insight in the influence of the molar mass distribution may result. 

A second fundamentally important area of research, in which the influence of temperature was poorly understood, and in which an influence of hydrostatic pressure was unknown, was the physiological and biochemical action of narcotics and other drugs. Quantitative interpretations were attempted through various hypotheses, based for example on correlations between potency of action and solubility of the drug in olive oil, and distribution of the drug between water and olive oil at different temperatures.Other theories were based on partial agreement of quantitative effects with adsorption isotherms or on specific properties of the drug. - ... 

The significance of quantitative determinations of kf in such studies is limited by uncertainties concerning the relative contributions of various collision partners, M -. No systematic effort to separate these effects has been reported. In a recent study of profiles in one hydrogen-rich flame, the mean value of kf at 600 K for the particular gas composition was estimated to be 3 x 10 cm mole sec . Similarly, concentration and temperature measurements within the primary zone of a hydrogen-lean flame yielded (1000-1350 K) = 1 x W cm mole" sec, with assumed to be HgO. Both values are in reasonable agreement with those in Table 2.2, if allowance is made for the estimated influence of composition. 

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