Appreciate assist

The H-NMR spectra of pavines can provide appreciable assistance in structural elucidation. The oxygenation pattern of a pavine may be deduced from a careful examination of the methine (H j) and methylene (H. f) proton absorptions (Ic). In the case of 2,3,8,9 substitution, the abc and def protons furnish two superimposable ABX patterns. A doublet integrating for two protons at the lower field end of the system at approximately 8 4.0 represents the bridgehead protons, Ha and Hj. At 60 MHz, it appears as if these protons are coupled to only one of the neighboring protons (J = 6 Hz) (18,20,25). Furthermore, the geminal hydrogens couple to each other with a coupling constant of 17 Hz (18,20). On... 

Dodge, and Maile Ventura. Another Hawaiian mahalo to Julia Myers and Michael Niederer for designing and maintaining the ConceptChem.com website. To Alayne Schroll and the other faculty of the chemistry and physics departments at St. Michael s College, thank you for your continued support. Special thanks are extended to Frank L. Lambert, Professor Emeritus Occidental College, for his much-appreciated assistance in the development of Conceptual Chemistrys presentation of the second law of thermodynamics. 

We would like to thank Dr. Velmer Fassel, in whose laboratory this work was performed, for his hospitality and highly appreciated assistance in reviewing this manuscript. 

Partial financial support for the research was provided by American University (AU) New Faculty and Senate research awards. We should like to thank Ms. Nnenna Nwokekeh for specimen collection and Ms. Annette Stange, Ms. Karen Byrne, and Ms. Patrina Merlino for brine shrimp assay studies. We also appreciate assistance of Mr. Martin Shapiro at AU with literature searches. We also would like to thank Ms. Esther Katz and Dr. Byron Backus for helpful discussions and critical review of the manuscript. 

The authors are very much indebted to Mrs. N. Dismuke and Mrs. G. Haines for help in calculating values for the theoretical curves, and to Mrs. A. T. Monk who gave much appreciated assistance with an earlier report on which the present one is based. They are greatly indebted also to members of the Chemistry Divisions of both Argonne and Clinton Laboratories for many helpful discussions and clarification of experimental data. This article is based on work performed under Contract No. W-35-058-eng-71 for the Manhattan Project and the Atomic Energy Commission at Clinton Laboratories. 

Acknowledgements, We wish to thank Prof. CB Osmond and Ms S Balanchandran for the opportunity and help in doing the net photosynthesis and 77K fluorescence measurements. In addition, we appreciate assistance from Mr. Aron Knickerbocker and Ms Michele Card. RAJH was supported by the Monsanto Postdoctoral Research Fund at Washington University. Addition support was supplied by the Centre for Plant Science and Biotechnology at Washington University to HBP. 

We appreciate assistance from Lanzhen Zhuang in the preparation of 1-ArOAc and helpful discussions with Pat O Connor, Suzie Sheng, and Ruth Saxl. BAM thanks the U.S. Department of Education for the GAANN fellowship that provided partial support for her Ph.D. research. LSR appreciates... 

An acknowledgments section, typically placed near the end of a document, also provides a means by which the author or authors indicate that, although they appreciate assistance provided by others, they are responsible for the essence of the final product. The acknowledgments section might read, in part, as follows The authors gratefully acknowledge the assistance received from the indicated individuals and organizations. However, the authors are solely responsible for the opinions expressed, conclusions drawn, and recommendations made in this document. ... 

Alltech and Associates (Deerfield, IL) graciously provided permission to use the chromatograms in Ghapter 12 the assistance of Jim Anderson, Vice-President, and Julia Poncher, Publications Director, is greatly appreciated. Fred Soster and Marilyn Guller, both of DePauw University, provided assistance with some of the photographs. 

This work has been carried out in association with Professor Elias J. Corey, who suggested the study of protective groups for use in computer-assisted synthetic analysis. 1 appreciate his continued help and encouragement. I am grateful to Dr. 

Several new features are inaugurated in the present volume. To the cumulative subject index to the six volumes which have already appeared, a similar author index is now added. In order to bring literature references to methods of preparative value up to date, there has been included an appendix which contains later references to directions published previously in this series. The appendix also contains corrections to some of the earlier preparations. The editors acknowledge their appreciation of the assistance rendered by those who submitted corrections and suggestions, and welcome heartily any comments calculated to improve the series. 

I am thankful to LINDO Systems Inc. for providing the optimization software LINGO. I also appreciate the assistance provided by Mr. Brent Ellison and Mr. Obaid Yousuf in developing the MEN software. 

First, and perhaps foremost, are the members of the library staff at E. I. Du Pont de Nemours Co., Chemicals and Pigments Department, Jackson Laboratory, Deepwater, New Jersey, for their remarkable and enthusaistic assistance in culling literature. We particularly appreciate the efforts of Louise Del Signore, Dianne Cowperthwait, Evern Ford, Eleanor Price, Joanne Randolph, and Dot Toulson. 

The term r Vf in Equation (3.71) can be interpreted as a reduced fiber-volume fraction. The word reduced is used because q 1. Moreover, it is apparent from Equation (3.72) that r is affected by the constituent material properties as well as by the reinforcement geometry factor To further assist in gaining appreciation of the Halpin-Tsai equations, the basic equation. Equation (3.71), is plotted in Figure 3-39 as a function of qV,. Curves with intermediate values of can be quickly generated. Note that all curves approach infinity as qVf approaches one. Obviously, practical values of qV, are less than about. 6, but most curves are shown in Figure 3-39 for values up to about. 9. Such master curves for various vaiues of can be used in design of composite materiais. 

It is hoped that this section will give the reader a better appreciation of the range of ionic liquids that have already been prepared, as well as a summary of the main techniques involved and the potential pitfalls. While the basic chemistry involved is relatively straightforward, the preparation of ionic liquids of known purity may be less easily achieved, and it is hoped that the ideas given here may be of assistance to the reader. It should also be noted that many of the more widely used ionic liquids are now commercially available from a range of suppliers, including some specializing in the synthesis of ionic liquids [53]. 

Our research studies on ionomers and on ionomer blends has received financial support from the U.S. Army Research Office and ACS-PRF, whose assistance is gratefully appreciated. Our appreciation is also expressed to former graduate students, Drs. P. Jar, M. A. Bellinger, and X. Ma, who made significant contributions to some of the research results reported herein. 

Dead-weight loading (with or without the assistance of levers to reduce the load requirements) of tensile specimens has the advantage of avoiding some of the difficulties already discussed, not the least in allowing accurate determination of the stress if the specimen is uniaxially loaded. The relatively massive machinery usually required for such tests upon specimens of appreciable cross section is sometimes circumvented by the use of a... 

He would also like to take this opportunity to express his appreciation to Dr U. R. Evans and Dr W. H. J. Vernon for assistance given when he first contemplated entering the field of corrosion, and for their encouragement and advice in connection with the present work. 

The authors are happy to acknowledge the help and support of those people and institutions who assisted in fulfilling the task of writing this book. The present English edition includes numerous original results obtained by the authors in cooperation with their graduate students and coworkers after publication of the Russian version of the book in 1982. We appreciate very much their collaboration and the important role of the seminar of the Theoretical Chemistry Laboratory in the Institute of Chemical Kinetics and Combustion of the Russian Academy, where most of them work. 

Two main hazards associated with chemicals are toxicity and flammability. Toxicity measurements in model species and their interpretation are largely the province of life scientists. Chemical engineers can provide assistance in helping life scientists extrapolate their resrrlts in the assessment of chemical hazards. Chemical engineers have the theoretical tools to make important contributions to modehng the transport and transformation of chemical species in the body—from the entry of species into the body to their action at the rrltimate site where they exert their toxic effect. Chemical engineers are also more likely than life scientists to appreciate... 

Calculations on normal vibration modes and partition functions were performed by Dr. Z. Slanina. His assistance is greatly appreciated. We wish also to express our appreciation to Mrs. R. 2ohova for helping us with preparation of the manuscript. 

The support provided by BFGoodrlch is gratefully appreciated, as is the assistance by colleagues B. L, Cross, P. R. Heise,... 

Acknowledgements The financial assistance of MCYT and FEDER (Project BQU2001-0010) and Fundacion Seneca-CARM (Project PI-1/00749/FS/01) is highly appreciated. P. L.-L. also thanks Fundacion Seneca-CARM for a fellowship. 

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