Physical Processes in Radiation Biology
Proceedings of an International Symposium Sponsored by the U.S. Atomic Energy Commission and Held at the Kellogg Center for Continuing Education, Michigan State University, on May 6 - 8, 1963
Published on 22. October 2013
394 pages
978-1-4832-2327-8 (ISBN)
Description
Physical Processes in Radiation Biology covers the proceedings of an International Symposium on Physical Processes in Radiation Biology, held at the Kellogg Center for Continuing Education, Michigan State University on May 6-8, 1963, sponsored by the U.S. Atomic Energy Commission. The symposium aims to address the core problems of radiation biology concerning the absorption, distribution, and utilization of high energy packets in biological systems. This book is composed of 21 chapters, and begins with an introduction to the absorption, excitation, and transfer processes in molecular solids. The subsequent chapters discuss the nature of exciton processes; the mechanisms of charge transport in biological materials; the interactions of fast and slow electrons with model systems; the importance of liquid structures in determining the development of radiation damage; and the nature of the metastable species formed. The concluding chapters explore the importance of charge migration in energy transfer processes in different biological systems and the significance of higher excited levels in charge migration and energy transfer. These chapters also describe the nature of the hydration of electrons and protons in aqueous systems. This book will be of great value to radiation biologists, biophysicists, physical chemists, and physicists.
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Content
List of ContributorsPrefaceChapter 1 Absorption, Excitation, and Transfer Processes in Molecular Solids I. Introduction II. Absorption by Pure Molecular Crystals III. Arrays of Nearly Identical Absorbing Units IV. Host-Guest Interactions V. Some Comments on the Transfer Process VI. Molecular Excited-State Displacements in Mixed Crystal References DiscussionChapter 2 Classification of Excitons References DiscussionChapter 3 The Molecular Exciton Model I. Scope and Specification of the Model II. Molecular Exciton Wave Functions III. The Intermolecular Perturbation Potential IV. Exciton Splitting in a Simple Dimer V. Linear Chain Polymers VI. Applications of the Model VII. Summary ReferencesChapter 4 Interlocking Amide Resonance in the DNA Bases I. Introduction II. Amides III. Determination of Parameters IV. Testing of Parameters V. Uracil VI. Refinements References DiscussionChapter 5 Molecular Localization of Radiation Damage Relevant to Bacterial Inactivation I. Introduction II. Radiosensitivity and DNA Base Composition III. Synergistic Interaction between UV and X-Rays References Appendix DiscussionChapter 6 Comparison of Emission from Excited States Produced in Proteins and Amino Acids by Ultraviolet Light and Ionizing Radiation I. Introduction II. Experimental Procedures III. Results IV. Discussion ReferencesChapter 7 Biphotonic Processes I. Introduction II. Delayed Fluorescence III. Double Photon Excitation IV. Photoconductivity V. Photosynthesis References Appendix DiscussionChapter 8 Charge Transport Processes in Proteins and Organic Materials I. Introduction II. The Electrical Conductivity of Hydrated Proteins III. The Nature of the Charge Carriers in Hydrated Proteins References DiscussionChapter 9 Spectrometry of Energy Losses of Electrons Transmitted through Solids I. Introduction II. Multiple Scattering III. Discovery of Characteristic Energy Losses IV. Identification of the Origin of the Characteristic Energy Losses V. Characteristic Energy Losses in Compounds and Alloys VI. Small Angle Resolution References DiscussionChapter 10 Energy Loss Spectra for Charged Particles Traversing Metal and Plastic Films I. Introduction II. The Bohm and Pines Model and Its Experimental Verification III. The Search for the Light from Plasmon Decay IV. Plasma Effects in Carbon and Organic Molecules References DiscussionChapter 11 Excited States Produced by Low-Energy Electrons I. Introduction II. Design and Construction of Apparatus III. General Behavior of the Apparatus IV. Excitation Spectra of Helium, Argon, and Hydrogen V. Excitation Spectra of Ethylene VI. Conclusions References DiscussionChapter 12 Reactions in the Gas Phase between Thermal Energy Electrons and Compounds of Biochemical Interest I. Introduction II. Experimental Method References DiscussionChapter 13 The Structure of Liquids and Solutions as it Applies to Excitation Energy and Charge Migration Processes I. Introduction II. Diffraction Studies of Structure III. Charge Migration IV. Excitation Energy Transfer V. Summary References DiscussionChapter 14 Scintillation Properties of Liquids I. Introduction II. The Dependence of the Scintillation Pulse on Solute Concentration III. Quenching Effects IV. Mechanisms of Energy Transport V. Relative Scintillation Efficiency VI. Summary References DiscussionChapter 15 Reactive Species in the Irradiation of Water and Aqueous Systems I. Introduction II. Hydrogen Atoms and OH Radicals III. Radiation-Induced Formation of "Polarons" IV.
