INDEX future studies

In the past few years cardiologists have focused on the quantitation of a time constant in attempts to develop an index of isovolumic relaxation . However, the resulting controversies have stemmed mainly from the different computational methods employed. What has been lacking, is the development of mathematical models which may provide insights into the various mechanisms involved in these processes of relaxation. Brower et al (1983) have made a beginning in this direction and their model could provide a basis for future studies. Furthermore, an added stimulus for further studies in this area is provided by the recent editorial by Brutsaert et al. (1984) who propose a redefinition of systole and diastole. 

Future studies on different molecular, atomic and ionic compounds are in future envisaged for further clarifying the maximum hardness index role in elucidation of quantum nature of the chemical bond bonding as driven by inner electronic structures. 

One can go further by choosing the first five instead of the first three interaction paths from the data of Table 3.45, because this number is the cardinal of the employed correlation parameters in actual residual-alert-QSARs. However, though electronegativity and chemical hardness are closely related to the total energy, see Eqs. (3.160) and (3.163), using only the first three interacting residual-alert pathways seems appropriate for the present purpose. For future studies, the extra index of electrophilieity (Parr et al., 1999) can be also explicitly incorporated to test its conceptual value in the electrophilic theory of chemical carcinogenesis (Parthasarathi et al., 2004). 

Recently, the same series of six polyimides was studied by positron annihilation spectroscopy to determine die fractional free volume directly. In all three H/F analogue pairs, the increased free volume of the fluorinated polymer accounted for around 50% of the observed decrease in refractive index and dielectric constant. This result confims an astonishingly large free volume contribution predicted by our earlier estimates.Future work will investigate the generality of this result to other polymer systems. 

The ability to manipulate the neutron refractive index, through D/H isotopic substitution, makes it a powerful technique for the study of mixtures, and for more detailed structural investigations. This is an aspect of the technique that will clearly be important in the future as more complex multi-component systems are investigated. 

A study about different diesel fuels for example, showed that cetane index underestimates cetane number when it is lower than 43, sometimes more than 5 units (C.N.=40, C.I. = 35.1). Therefore, the actual cetane numbers for our products can be higher than the measured ones. In the future, producing higher amounts of product to measure actual cetane numbers appears to be necessary to confirm their suitability as diesel fuel. 

The American Association of Cereal Chemists appointed an Abstract Committee to study the problem of abstracts and indexes. Upon the recommendation of the committee, arrangements were made with Biological Abstracts (14 ) to publish a separate section. Section J, Abstracts of Cereals and Cereal Products. This has been published since 1948. Financial support is given by the AACC and the Millers National Federation (12). It is too early to evaluate Section J as a tool. Since it is part of so huge a service it cannot hope to attain the position of a current review-type service. There are no plans for separate indexing the index to the complete edition is included with each section subscription. The December 1951 issue has a Numerical Key to Contents of Section J. The latest subject index to Biological Abstracts is Volume 23, 1949. However, future editorial policy may improve this situation. 

The rest of my review this year will therefore concentrate on this aspect of photochemistry, with the customary apologies to those who would prefer to read about developments in, for example, mechanistic studies, ultrafast reactions or photoaffinity probes. No doubt these themes will be picked up in future volumes. As usual, the chapter and reference numbers of the publications cited in this review can be found by using the Author Index, but I have also included the chapter numbers to aid those who wish to scan for chemical structures. 

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