Mentor

What particularly seemed to excite Wohler and his mentor Berzelius about this experiment had very little to do with vitalism Berzelius was interested m cases m which two clearly different materials had the same elemental composition and he invented the term isomerism to define it The fact that an inorganic compound (ammonium cyanate) of molecular formula CH4N2O could be transformed into an organic compound (urea) of the same molecular formula had an important bearing on the concept of isomerism... 

The author wishes to dedicate this work to Mr. T. H. Shen of Yungkoo Paint Varnish Mfg. Co., Taipei, who gave him the rare opportunity of starting a new alkyd plant as the first job assignment for a fresh college graduate, and to the memory of the late chairman of the Department of Polymers Coatings, North Dakota State University, Dr. Alfred E. Rheineck, teacher, mentor, and friend. 

A number of less expensive sieve shakers are on the market, such as the Dynamic, by Soiltest Inc., Chicago the Cenco-Meinzer, by Central Scientific Co., Chicago the Tyler portable, by W. S. Tyler, Inc., Mentor, Ohio and also a number of electromagnetic vibratory shakers. The latter should be used only when strict comparability with other tests is not required, since it is difficult to be sure that identical intensity of vibration was present in the tests being compared. 

Screen Ejficiency There is confusion concerning the meaning of screen efficiency, as a uniform method for figuring efficiency has never been established. A sound method of evahiating screen performance is given by W. S. Tyler, Inc., Mentor, Ohio, in its Sieve Handbook, no. 53. In this formula, when material put through the screen is the desired product, efficiency is the ratio of the amount of undersize obtained to the amount of undersize in the feed. 

Dedicated to Arthur C. Stern, the pioneer in air pollution science and engineering, by three humble followers. He was our mentor, taskmaster, and friend. 

Finally, I would like to add that the loss of my friend and mentor Dr. C.M. Simmang who has written the foreword to the first edition of this book is a deep loss not only to me but also to the engineering edueational eom-munity and to many of his students from Texas A M University. 

My thanks go first of all to Professor Sir Alan Cottrell, metallurgist, my friend and mentor for more than half a century, who has given me sage advice almost since I emerged from swaddling clothes. He has also very kindly read this book in typescript and offered his comments, helpful as always. 

I dedicate this manuscript to my senior colleague and mentor. Professor Siegfried Hess, whose advice, support, and many expressions of personal sympathy have been of vital importance to my scientific work over the past years. Without him nothing would have been accomplished. 

American Polymer Standards Corporation, Mentor, Ohio 44060... 

Improving the duty meant using fuel more efficiently, but to rationalize that easy truth was the work of more than a century. Theoretically, it depended, among other things, on the recognition in 1758 by Adam Black—Watt s mentor at Glasgow—of a distinction between heat and temperature, and the recognition by nineteenth-centuiy chemists of an absolute zero of temperature. On the practical side... 

He received his Ph.D. in 1926 at Kiel working with Otto Dieis. He worked first at I. G. Farbert on the manufacture of plastics but then became professor at the University of Cologne (1940-1958). He snared the 1950 Nobel Prize in chemistry with his mentor, Otto Diels. 

Teacher without peer Expositor without parallel Friend and mentor... 

With my great respect, I dedicate this book to the memory of my three mentors. 

The collaboration with many scientists over the years has had a major influence on the structure and content of this book. We are especially indebted to J. Rex Goates, who collaborated closely with one of the authors (JBO) for over thirty years, and has a close personal relationship with the other author (JBG). Two giants in the field of thermodynamics, W. F. Giauque and E. F. Westrum, Jr., served as our major professors in graduate school. Their passion for the discipline has been transmitted to us and we have tried in turn to pass it on to our students. One of us (JBG) also acknowledges Patrick A. G. O Hare who introduced her to thermodynamics as a challenging research area and has served as a mentor and friend for more than twenty years. 

Sincerest thanks are also expressed to Professor Dr. Lothar Riekert from Mobil and U. Karlsruhe, a true thinker and lifelong mentor and friend and also to my dear colleague Professor Xenophon Verykios at Patras who first introduced me to the mysteries of metal-support interactions. 

The competence of the mentors, as college teachers, is invariably strongest in one or another of the traditional disciplines, and instruction of students has generally been through courses in one discipline without explicit reference to another. Yet the need for global change instruction is for help in understanding a multidisciplinary set of problems. Some appear to lie mainly in the natural sciences while others deal more with humanity, but all should be studied in a broad framework that embraces both science and humanities. How to achieve... 

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