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Dr. Sam Sieber makes a convincing case that harbored in a potpourri of such events are countless instances of how well-intentioned social interventions often produce harmful effects.

Carbenes, nitrenes, and arynes are of great interest to chemists because of the central role they play, as the key intermediates, in a wide range of chemical reactions.

One property common to all cells is transport. If one can prepare a suitable plasma membrane fraction (sealed, impermeable vesicles with the necessary transport components intact), it becomes possible to separate the events of transport from any subsequent metabolism that may occur in the cell.

In arecent plenary address to the American College of Cardiology, Dr. Leroy Hood stated that he expected the application of the techniques of recombinant DNA and molecular biology to medicine would advance the field more in the next twenty years than all of the progress that has been made in the past 2,000 years.

Prostagtandin Abstracts Volume II contains abstracts of the significant scientific Iiterature published in 1971, 1972, and 1973 on the role of prostaglandins in human reproduction.

The advent of hybridoma technology leading to the successful produc tion of monoclonal antibodies against a variety of tumor-associated antigens has, during the last decade, provided a very powerful tool for research and clinical investigations.

In addition to the five sessions, the chairmen of each session were asked to prepare a synthesis and overview of each of the sessions. The chairmen of the plenary sessions prepared short summary papers which have been incorporated into this volume at the end of each major section.

Omenn Dean, Public Health and Community Medicine University of Washington Seattle, Washington 98195 On behalf of the University of Washington, the City of Seattle, the sponsors and donors, and my co-organizers, I am delighted to welcome all of you to this Conference on Genetic Control of Environ mental Pollutants.

Overproduction of meetings and papers is often mentioned by many pro fessionals, but when we look at the professional activi ties of the critics of these meetings and papers, we can see that they also behave in the stereotypic way - they write papers, read them at congresses and publish in periodicals.

During recent years there has been increasing interest in the value of a number of chemical and physical-chemical analytical methods for the detection and characterization of microorganisms.

In Volume 1 of this series, attention was focused on neuropoisons of animal origin. And third, we have been immeasurably aided by our assistants, Mrs. Ruby Hough in New York City and Mrs. Helena Walsh in Canberra. Curtis New York City Canberra vii Contents Chapter 1 Reserpine 1 by Theodore A.

The past decade has seen a major resurgence in optics research and the teaching of optics throughout the major universities both in this country and abroad.

As a consequence of this membrane fluidity, a phospholipid molecule is very mobile within the plane of the membrane (moving a distance of about 1-2 fLm in 1 s) but the movement of a phospholipid molecule from one side of the membrane bilayer to the other (flip-flop) is very slow.

With the development of highly sophisticated analytical techniques and instrumentation during the past 15-20 years, progress in the field of lipid biochemistry has been greatly accelerated.

The NATO Advanced Study Institute entitled "Surface Membrane Receptors: Interface Between Cells and Environment" was held in Bellagio, Italy September 13-21, 1975.

"e of the reasons for all the F ASEB Societies to meet yearly is the possibility O to interrelate recent progress in diverse areas of research. They center around a basic theme with the aim of discussing active research, in cluding widely divergent approaches, towards a better understanding of a general biological phenomenon.

Each volume, therefore, will be devoted to a specific topic in the field of animal behavior, which will be explored with respect to its evolutionary aspects, including the adaptive nature of the behav ior; Lehrman's lifelong love and study of animal behavior gave us a wealth of new insights into reproductive behavior and evolution.

The purpose of this book is to introduce and survey the various quantitative methods which have been proposed for describing, simulating, embodying, or characterizing the processing of electrical signals in nervous systems.

Immediate ly after the jubilee meeting (May 21-24, 1969), the Fedorov All-Union Symposium on Crystal Growth was held, and the proceedings of that symposium constitute Volume 9 of Growth of Crystals.