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The Rationale for the Present Book Perhaps the most critical problem facing present-day particle physicistsis to delineate the relationship between classical and quantum systems. This relationship has many facets. Particle-waveduality is one. The concept of the point particle is another. And theconcept of particle mass is yet another. The electron, as the lightest of the charged particles, represents a fundamental "ground state",and many of the essential problems in the murky area between the domainsofclassical and quantum physics can be brought into focus by studyingjust this one particle. Thus the present book is centered on questions that arise in connection with the electron, and in part...
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There are two now classic reasons for the widespread and con tinuing interest in the phylogeny of immune reactivities and structure. First is the fundamental concern of biologists with the evolution of defense mechanisms. We are eager to discover origins, mechanisms, and adaptive specializations of immunocompetence because the very existence of individuals and entire species is involved in a most essential way. Second is the strong biomedical interest in adaptive immune mechanisms to increase understanding of health and disease in man. If man and placental mammals represent the quin tessence of immunoresponsiveness with complex interdependent path ways, the less elaborate but fully functiona...
Includes maps of the U.S. Congressional districts.
With the expansion of human settlements and the environmental changes brought about by human activity and pollutants, toxicology and risk assessment of amphibian species has become increasingly of interest to toxicologists involved in environmental research. This book focuses specifically on environmental risk assessment in premetamorphic stages and adults of amphibians. Amphibian ecotoxicology is not totally understood in scientific research and as such environmental risk assessment in these vertebrates is an area of rapidly growing interest. It has the potential to answer some of the questions regarding risks to our environment. An ideal companion, this book will be useful to toxicologists and ecologists investigating risk assessment in the environments of amphibians, while also of interest to those working in conservation biology, biological invasion, biocontrol and habitat management.