Simplicity and clearness

In fireworks very complicated arrangements are so easily available that people are apt to select colour changes which are too complicated. 

The artistic object must be clear for a half-hearted and featureless 

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In this chapter, we concentrate on the role of the intermolecular interactions at interfaces based on the surface dynamics, the surface free energy at a given temperature and the surface energy (or enthalpy) of a solid. Contact angle and gas chromatographic techniques are respectively chosen for the studies of wettability and adsorption phenomena because of their simplicity and clearness. The degree of adhesion at interfaces between unlike solid substances is also discussed from a viewpoint of intermolecular interactions. 

H. Kolb aptly noted, nature does not limit itself with performing variations on four themes water, hydrogen, hydrogen chloride, and ammonia . In fact, the number of types had to be later considerably increased, so that the theory had lost much of its initial simplicity and clearness. Moreover, it could not cover many facts related to the addition and elimination reactions and to isomerism. 

Although the strict classification of the different systems according to the Phase Rule would be based on the variability of the systems, the study of the many different phenomena, and the correlation of the comparatively large number of different systems, will probably be rendered easiest by grouping these different phenomena into classes, each of these classes being studied with the help of one or more typical examples. The order of treatment adopted here is, of course, quite arbitrary but has been selected from considerations of simplicity and clearness. 

The best method of assessing the sharpness of melting of a fat is organoleptically by a trained panel or, even better, by an outstanding individual. But the information so obtained cannot be communicated or stored in quantitative terms and so use is made of the solid fat content (SFC) at various temperatures. Even this method, however, lacks the simplicity and clear message of a single number. 

Many reactions exhibit effects of thermodynamics on reaction rates. Embodied in the Bell-Evans-Polanyi principle and extended and modified by many critical chemists in a variety of interesting ways, the idea can be expressed quantitatively in its simplest form as the Marcus theory (15-18). Murdoch (19) showed some time ago how the Marcus equation can be derived from simple concepts based on the Hammond-Leffler postulate (20-22). Further, in this context, the equation is expected to be applicable to a wide range of reactions rather than only the electron-transfer processes for which it was originally developed and is generally used. Other more elaborate theories may be more correct (for instance, in terms of the physical aspects of the assumptions involving continuity). For the present, our discussion is in terms of Marcus theory, in part because of its simplicity and clear presentation of concepts and in part because our data are not sufficiently reliable to choose anything else. We do have sufficient data to show that Marcus theory cannot explain all of the results, but we view these deviations as fairly minor. 

Secondly, I wish to counteract anticipated despondency which some of the complexities on the present theoretical scene may perhaps provoke. For this purpose, I wish to invoke the decisive simplicity and definiteness of some of the experimental effects observed within the confines of the above, near ideal systems. This, as I often pointed out elsewhere, is unmatched in the field of crystal growth of simple substances. Complicated as polymers may seem, and subtle as some of the currently relevant theoretical issues, this should not obscure the essential simplicity and reproducibility of the core material. To be specific, the appropriate chains seem to want to fold and know when and how, and it is hardly possible to deflect them from it. Clearly, such purposeful drive towards a predetermined end state should continue to give encouragement to theorists for finding out why Those who are resolved to persevere or those who are newly setting out should find the present review a most welcome source and companion. 

Energetic attempts are being made at this time by Coulson, Daudel, Pullman and others to refine the theory of electron distribution in polycyclic aromatic systems, but it is not clear to the writer that the best compromise between simplicity and accuracy has yet been secured. 100... 

Because its simplicity and the absence of signal suppression and other matrix effects, Direct-EI may offer a clear advantage over ESI in several small molecule applications. Many analytes (i.e., lindane) that give no signal with ESI, generate an intense and very informative spectrum (Figure 8.11). 

In the following sections, it is not the intention of the author to repeat the analysis of Kapral [285] in its detail or clear exposition, but rather to emphasise the simplicity and elegance of the description of a very complex situation, A few flags are raised to show the general trend of the analysis. It is hoped these will help the reader to dip into these articles. 

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