Perspectives on Progress

My attempt of depicting the new frontiers for Quantum Chemistry has no produced exhaustive and detailed indications. It is almost impossible to present in a few pages indications of this type, of questionable validity even tf expressed as final report of a panel of experts, after a hard collective work on this theme. Quantum Chemistry is in fact one of the cornerstones of Chemis, enjoying good health as the other branches of Chemistry, and there are ample and varied perspectives of progress. A selection of some themes woitld means to indulge too much to personal tastes. 

Lonard DM, Smith CL (2002) Molecular perspectives on selective estrogen receptor modulators (SERMs) progress in understanding their tissue-specific agonist and antagonist actions. Steroids 67 15-24... 

The two H-bonded species in (5.65) can be visualized as points along an intrinsic reaction coordinate that connects reactant and product species through the transition state ( ). In this manner we can gain a more global perspective on how each H-bonded species is related to overall progress along the chemical reaction pathway. 

Equations 19.17 and 19.20 provided the foundation for further progress on the shape function-based perspective on chemical DFT. The first extension, by Baekelandt et al. [27], laid out the mathematical structure associated with these new pictures and introduced new reactivity indicators. This paper reveals that the isomorphic ensemble provides a particularly useful approach to the hardness picture of chemical reactivity, and allows one to define a local hardness indicator,... 

B. Gunter, A perspective on the Taguchi methods. Quality Progress, June 1987, 44-52. 

It is further stated by Kistiakowsky (Ref 24, PP 954-55) that a restatement of above reasoning from a slightly different point of view may be helpful for a correct perspective on the situation existing in a detonation wave. Such wave, from a chem standpoint, starts in the intact explosive certain fast reactions take place in it. which may eventually progress to a state of complete hydro-dynamic equilibrium, controlled by the local pressure and temp in the wave. 

The ongoing research into the structure and mechanism of flavoenzymes has been the subject of several recent excellent reviews The proceedings of six symposia held at intervals over the past 16 years provide an overall perspective on the progress of flavoenzyme research over this time period. The intent of this article will be to focus directly on the chemical and physical properties of the semiquinone form of flavin coenzymes to the extent that current knowledge permits, from the point of view of both model system studies and from existing knowledge of their properties in flavoenzyme systems. For an in-depth treatment of flavin and flavoenzyme redox properties in which the oxidized and hydroquinone forme as well as the semiquinone form are discussed as related to their biological function, the reader is refered to the article by F. Muller in this volume. 

FIGURE 3 Diagenetic versus trophic perspectives on the relationship between molecular size and reactivity. Perceptions of size-reactivity relationships depend on whether the focus is on what is consumed or what remains. From the trophic perspective, small molecules turn over more rapidly than polymers, which turn over more rapidly than humic complexes. From the diagenetic perspective, large molecules are progressively stripped of reactive moieties, leaving behind small refractory residuals. 

Drioli, E. and Romano, M. (2001) Progress and new perspectives on integrated membrane operations for sustainable industrial growth. Industrial Engineering Chemistry Research, 40, 1277-1300. 

This book is intentionally broad in scope. I recognize that some chapters may lack in depth, but I hope the collection will provide readers with human perspective on what is involved in chemical process development. I am aware that there are omissions, such as to the broad uses of computers and applications of statistics, which may intensify concealment of their value in developing chemical processes. I therefore urge practitioners to consult with their leaders for guidance on questions regarding other disciplines to accommodate in progressing their work. 

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