Medical research

Plant pathology embraces all aspects of biological and scientific activity which are concerned with understanding the complex phenomena of diseases in plants.

Animals are important components of any ecosystem and it is impossible to describe structure and funCtioning of the Fennoscandian tundra ecosystems without including this part of the system.

The public's serious concern about the uncertainties and dangers of the conse- quences of human activities on environmental quality demands policies to control the situation and to prevent its deterioration.

A book previously published within the framework of the Ecological Studies Series, entitled "e;Physical Aspects of Soil Water and Salts in Ecosystems"e; included awidespectrum of research papers devoted to new findings in the field of soil-plant-water relationships.

At the end of the last century and the beginning of this century, the prob- lems of immunity in lower vertebrates and the influence of environmental temperature attracted attention for the first time (ERNST, 1890; WIDAL and SICARD, 1897; METCHNIKOFF, 1901).

The papers collected in this book were given and discussed at the symposium on "e;Soil water physics and technology"e;, which was held in Rehovot, Israel, from August 19th-September 4th, 1971.

The past decade has seen a remarkable increase in the use of electron microscopy as a researm tool in biology and medicine.

It is now generally accepted for a variety of reasons - morphological as well as physiologica- that the visual systems of arthropods provide a suitable model for the study of information proces- sing in neuronal networks.

This volume contains the proceedings of a Symposium held at the University of Kiel, Germany, from 31 March to 6 April, 1971.

Influenza continues to be one of the major epidemic diseases of man and is, in fact, his only remaining pandemic disease (BEVERIDGE, 1969).

In spite of ingenious experiments, imaginative theories, and unshakable faith in supreme forces, there is no way to know how life began.

Sea urchin eggs are objects of wonder for the student who sees them for the first time under the microscope.

Prominent progress in molecular biology was only made when it became possible to separate functionally distinct molecules by taking advantage of their biophysical properties.

Pollen transmits the male genetic material in sexual reproduction of all higher plants.

Plans for an International Symposium on the Early Life History of Fish were first discussed in 1967 at the F.

Although this is basically a translation of the second German edition published in 1970, more recent experimental findings have, in several instances, been incorporated into the text.

This volume is dedicated to the memory of the late Professor WERNER BRAUN, one of the most devoted and active members of the Editorial Board of the Current Topics in Microbiology and Immunology, who passed away, after suffering a heart attack, in November 1972.

General aspects of nucleic acid uptake by mammalian cells have been the subject of several reviews during the last few years (PAGANO, 1970; BHARGAVA and SHANMUGAM, 1971; DUBES, 1971; RYSER, 1967).

This volume represents the proceedings of the 24th Mos- bach Colloquium on "e;Regulation of Transcription and Trans- lation in Eukaryotes"e; which was held April 26-28, 1973, in Mosbach, Germany, under the auspices of the Gesellschaft fiir Biologische Chemie.

The study of thermoregulation in endotherms has contributed much to the emergence of the concept of control theory in biology.

When Richard Goldschmidt' coined the term "e;intersexuality"e; in 1915, he intended it to apply to normally dioecious species which exhibit some kind of mixture between male and female characters.

When Budge in the eighth decade of the nineteenth centlll'Y, started his investigations into the origin and development of the lymphatic system, he probably did not expect that these would be the starting-point for disputes that would continue well into our time.

The processes involved in herpesvirus replication, latency, and oncogenic transformation, have, in general, been rather poorly defined.

The purpose of this monograph is to bring together in one volume some of the more recent knowledge of the cellular and biochemical constit- uents of sheep's blood.

When WILHELM RUHLAND developed his plan for an Encyclopedia of Plant Physiol- ogy more than three decades ago, biology could still be conveniently subdivided into classical areas.

As plant physiology increased steadily in the latter half of the 19th century, problems of absorption and transport of water and of mineral nutrients and problems of the passage of metabolites from one cell to another were investigated, especially in Germany.

In the first part (Part A) of this volume on transport, there was an emphasis on the processes occurring at the membranes bounding the cells.

The discovery of the reversible red far-red control of plant growth and development and the subsequent in vivo identification and isolation of the photoreceptor pigment, phyto- chrome, constitutes one of the great achievements in modern biology.

At the 6th International Conference on Plant Growth Substances, held in Carleton University, Ottawa in 1968, it was decided that the 7th should be held in Czecho- slovakia, following an invitation by Dr.