The acid metabolism of certain succulent plants, now known as Crassulacean Acid Metabolism (CAM) has fascinated plant physiologists and biochemists for the last one and a half centuries.
Dynamic Morphology is the attempt to correlate surface architec- ture and shape of fixed cells, as visualized by scanning electron microscopy (SEM), with the behavior of living cells, recorded by microcinematography (MCM).
In the European Alps the importance of forests as protection against ava- lanches and soil erosion is becoming ever clearer with the continuing increase in population and development of tourism.
Despite the amazing progress made by the stereotactic technique, particularly regarding the localization of the target, despite the extreme caution, which stereotactic neurosurgeons apply at every step of the procedures, despite the routine roentgenologic and physiologic controls (depth EEG, electric stimulation) preceding the production of a lesion, there remains a certain degree of uncertainty regarding the position, shape and extent of the lesion as well as of the electrode track and also regarding unintended lesions in the vicinity.
Recent physiologic investigations have shown that the deep cerebellar nuclei may play an important role in the initiation and monitoring of skilled move- ments.
The vertebrate eye has been, and continues to be, an object of interest and of inquiry for biologists, physicists, chemists, psychologists, and others.
In review, the amount of information available on the morphological and func- tional properties of the frog nervous system is very extensive indeed and in certain areas is the only available source of information in vertebrates.
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.
No other disjunct pieces of land present such striking similarities as the widely sepa- 1 rated regions with a mediterranean type of climate, that is, the territories fringing the Mediterranean Sea, California, Central Chile and the southernmost strips of South Mrica and Australia.
