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The papers that follow are concerned with the analysis of single genes or small gene families. One involves isolating a gene from a cultivated plant, changing it in a specific way and then inserting it back into the same plant where it produces an altered gene product.

Whitham Modulation Equations and their Exact Solutions: The Whitham Equation and Shocks in the Toda Lattice; Bloch, Kodama. Semiclassical Behavior in the NLS Equation; Bronski, McLaughlin. A Numerical Study of Nearly Integrable Modulation Equations; Forest, Sinha. The Quasiclassical Limit of the Inverse Scattering Method; Geogjaev. Asymptotics and Limits: Long-Time Asymptotics for the Autocorrelation Function of the Transverse Ising Chain at the Critical Magnetic Field; Deift, Zhou. Resonances in Multifrequency Averaging Theory; Dobrokhotov. Billiards Systems and the Transportation Equation; Golse. Existence and Regularity of Dispersive Waves: Geometric Phases and Monodromy at Singularities; Alber, Marsden. Nonlinear Waves and the 1:1:2 Resonance; Craig, Wayne. Defects of One Dimensional Vortex Lattices; Chernykh, et al. 15 additional articles. Index.

Preface; A. Altman, Y. Waisel. Diversity of Roots: The Place of Roots in Plant Development and the Diversity of Root Types; P.W. Barlow, B. Palma. Induction of Roots and Their Development: Indissociable Chief Actors in the Inductive Phase of Adventitious Rooting; T. Gaspar et al. Hormonal Control of Root Induction and Development: Increased Induction of Adventitious Rooting via Slow Release Auxins and Elicitors; van der Krieken et al. Molecular Biology of Root Development: Auxin Induced Gene Expression During Rooting of Loblolly Pine Stem Cuttings; B. Goldfarb et al. Ecological Aspects of Root Development: Shootborne Roots: An Adaptive Organ in Sand Dunes; A. Danin. Applied Aspects of Root Development: Relations between Early Root Growth and Flower Yield of Clonal Rose Rootstocks; D.P. de Vries, L.A.M. Dubois. Root Products: Insane Roots and Twisted Carrots: Physiology and Biochemistry of Root Specific Metabolites; H.E. Flores. Models and Methods for Root Study: Morphological Structured Model for Hairy Root Culture; I. Berzin et al. Concluding Remarks: A 1996 Overview of the Research Interests from the Jerusalem Symposium T. Gaspar. 71 additional articles. Index.

This volume summarizes current research on the influence of plant polyphenols on human health, promoting collaboration between chemists and biologists to improve our understanding of their biological significance, and expanding the possibilities for their use.

The current and potential importance of plant tissue culture techniques in crop improvement is hard to overemphasize. This volume is a collection of papers presented at the Con ference on "Crop Improvement Through Tissue Culture", held at the Base Institute, Calcutta, India in December 1981.

The book contains chapters by outstanding researchers and scholars who have made substantial contributions to some aspect of scholarship about pro social behavior-helpfulness, generosity, kindness, coopera tion, or other behavior that benefits people.

This Volume contains the papers presented by twenty-eight invited speakers at the symposium entitled, "Genetic Manipulation of Woody Plants," held at Michigan State University, East Lansing, Michigan, from June 21-25, 1987.

This book is the compilation of papers presented at the International Symposium on in vivo Body Composition Studies, held at the University of Toronto, Ontario, Canada, June 20 - 23, 1989.

The second was to examine the implications of such principles for the execution and evaluation of test procedures, and critically assess the research areas that need further attention in order to improve the interpretation of test results.

Laskin Biosciences Research Exxon Research and Engineering Company Linden, New Jersey I was contacted in the Fall of 1981 by Professors Martin Dworkin and Palmer Rogers, of the University of Minnesota and asked to participate in the orgnization of the 1983 conference in the series, "Interface Between Biology and Medicine".

This book is based on the papers presented at the conference on "Mecha nisms of DNA Damage and Repair: Implications for Carcinogenesis and Risk Assessment," held at the National Bureau of Standards on June 2-7, 1985, This volume deals with mechanisms of DNA damage and repair at the molecular level;

Work with Tradescantia became feasible after Edgar Anderson straightened out the ecology and Sax took advantage of the small number of chromosomes easily visible under the microscope. One of the most important stages in chromosome research was the development, in radiation biology, of radiolabeling the chromosome with tritiated thymidine.

This volume summarizes current research on the influence of plant polyphenols on human health, promoting collaboration between chemists and biologists to improve our understanding of their biological significance, and expanding the possibilities for their use.

The resultant interaction should encourage new and extended ideas for the improve ment of strains and for the generation of new regulatory combina tions to enhance microbial chemical production from cheap and abundant (including waste) substrates.

The growing concern about where energy rich chemicals for the future will come from has stimulated a resurgence of interest in the potentialities of microbial fermentations to assist in meeting anti cipated demands for fuels and chemicals.

Proceedings of a workshop held in Santa Fe, New Mexico, October 24-28, 1994

This symposium is the third in a series featuring the propaga tion of higher plants through tissue culture. One of the aims of these symposia was to examine the current state of-the-art in tissue culture technology and to relate this state of technology to practical, applied, and commercial interests.

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.

The Symposium on Organ and Species Specificity in Chemical Carcinogenesis was held March 1981 in Raleigh, North Carolina. We badly need an adequate data base on human organs, human tissues, human cells, human subcellular preparations, and human body fluids.

Omenn Dean, School of Public Health and Community Medicine University of Washington Seattle, Washington 98195 On behalf of the University of Washington , the City of Seattle, the Steering Committee, and the sponsoring agencies, corporations, and organ izations, I welcome you.

We knew that light was an important factor for cell recovery, so all our experiments were done in dim light, with the plated-out cells being covered with dark cloth.

With the encouragement of members of the Ford Foundation staff and the National Academy of Sciences, the idea for a symposium on the broad approach to the problem of nutrition was developed by Dr. Moises Behar, the second director of INCAP, 1961-1974, Dr. Nevin Scrimshaw, fIrst director of INCAP, 1949-1961, and members of the INCAP staff.

Our present concepts ofthe regulation of enzyme activity in the cell have been largely based on the extensive body of work which has been carried out with micro-organisms.