In den letzten Jahren wurde ich ofters aufgefordert, vor Horern sehr verschiedenen Bildungsgrades uber die Ergebnisse zu berichten, die die Chemie und insbesondere die Lehre von den chemischen Elementen der radioaktiven Forschung ver dankt. Das grosse. Interesse, das diesen Fragen entgegen gebracht wird, veranlasst mich, in dem vorliegenden Bandchen einen Uberblick uber das genannte Thema zu geben. Da uber die altere Entwickelung des Gebietes, die dem Studium der radioaktiven Umwandlungen der Elemente galt, zahlreiche auch populare Schriften vorliegen, habe ich die Umwandlungstheorie verhaltnismassig kurz behandelt und das Hauptgewicht auf die neuere Lehre von den isotopen Elementen gelegt, wobei auch die wichtigsten Ergebnisse der Spektro skopie der Rontgenstrahlen und der Erforschung der Atom struktur gestreift wurden. Die Darstellung wurde auf einem solchen Niveau gehalten, dass sie (bis auf ganz wenige spezielleren Fragen gewidmete Abschnitte) wohl jedem Leser, dem die Grundlagen der Physik und Chemie bekannt sind, verstandlich sein durfte. Ich hoffe aber, dass das Buchlein auch physikalischen und chemischen Fachmannern willkommen sein wird, die die rasche Ent wickelung des Gebietes nicht selbst an der Hand der Original literatur verfolgen konnen."

This is a pre-1923 historical reproduction that was curated for quality. Quality assurance was conducted on each of these books in an attempt to remove books with imperfections introduced by the digitization process. Though we have made best efforts - the books may have occasional errors that do not impede the reading experience. We believe this work is culturally important and have elected to bring the book back into print as part of our continuing commitment to the preservation of printed works worldwide.

Die vorliegende Arbeit bezweckt, eine Ubersicht uber die Untersuchungen an radioaktiven Substanzen zu geben, die ich seit mehr als vier Jahren ausfuhre. Der Ausgangspunkt war eine Untersuchung der von Herrn Becquerel entdeckten Uran strahlen. Die Resultate, zu welchen diese Arbeit mich fuhrte, schienen eine so interessante Perspektive zu eroffnen, dass Herr Curie, unter Aufgabe seiner eigenen Arbeiten, sich mit mir ver einigte und wir gemeinsam auf das Ziel hinarbeiteten, die neuen radioaktiven Substanzen zu extrahiren und naher zu er. forschen. Von Anfang unserer Untersuchungen an hielten wir uns fur verpflichtet, Proben der von uns entdeckten und hergestellten Substanzen an einige Physiker zu verleihen, vor allen Dingen an Herrn Becquerel, den Entdecker der Uran strahlen. So haben wir selbst die Untersuchungen andrer uber die radioaktiven Sub stanzen erleichtert. Bald nach unsren ersten Veroffentlichungen befasste sich auch Herr Giesel in Deutschland mit der Herstellung dieser Substanzrn und verlieh ebenfalls Proben davon an mehrere deutsche Physiker. Spater wurden die Substanzen in Deutsch land und Frankreich in den Handel gebracht und die immer mehr zunehmende Wichtigkeit des Gegenstandes wurde die Veranlassung zu einer wissenschaftlichen Bewegung, so dass zahlreiche Arbeiten uber die radioaktiven Korper erschienen sind und noch fort wahrend erscheinen, vor allem im Ausland. Die verschiedenen franzosischen und auslandischen Arbeiten fuhren naturlich zum Teil zu gleichen Resultaten, wie bei jedem neuen und in Bildung Curie, Untersuchungen Uber radioaktive Substanzen. 1 2 begriffenen Wissenszweig. Das Aussehen der Frage andert sich sozusagen von Tag zu Tag."

All living matter is comprised of cells, small compartments isolated from the environment by a cell membrane and filled with concentrated solutions of various organic and inorganic compounds. Some organisms are single-cell, where all life functions are performed by that cell. Others have groups of cells, or entire organs, specializing in one particular function. The survival of the entire organism depends on all of its cells and organs fulfilling their roles.While the cells are studied by different sciences, they are seen differently by biologists, chemists, or physicists. Biologists concentrate their attention on cell structure and function. What does the cell consist of? Where are its organelles? What function does each organelle fulfil? From a chemists' point of view, a cell is a complex chemical reaction chamber where various molecules are synthesized or degraded. The main question is how these, sometimes very complicated chains of reactions are controlled. Finally, from a physics standpoint, one of the main questions is the physical movement of all these molecules between organelles within the cell, as well as their exchange with the extracellular medium. The aim of this book is to look into the basic physical phenomena occurring in cells. These physical transport processes facilitate chemical reactions in the cell and that in turn leads to the biological functions necessary for the cell to satisfy its role in the mother organism. Ultimately, the goals of every cell are to stay alive and to fulfil its function as a part of a larger organ or organism. This book is an inventory of physical transport processes occurring in cells while the second volume will be a closer look at how complex biological and physiological cell phenomena result from these very basic physical processes.

Janus, the ancient Roman god depicted with two faces is an appropriate metaphor for light therapy. In the right photodynamic therapy conditions, light is able to kill nearly anything that is living such as cancers, microorganisms, parasites, and more. On the opposite face, light of the correct wavelength and proper dose (photobiomodulation) can heal, regenerate, protect, revitalize and restore any kind of dead, damaged, stressed, dying, degenerating cells, tissue, or organ system. This book discusses both sides of Janus' face in regards to light therapy.

Janus, the ancient Roman god depicted with two faces is an appropriate metaphor for light therapy. In the right photodynamic therapy conditions, light is able to kill nearly anything that is living such as cancers, microorganisms, parasites, and more. On the opposite face, light of the correct wavelength and proper dose (photobiomodulation) can heal, regenerate, protect, revitalize and restore any kind of dead, damaged, stressed, dying, degenerating cells, tissue, or organ system. This book discusses both sides of Janus' face in regards to light therapy.

This book presents new information on radiobiology that more clearly refutes the linear no-threshold (LNT) assumption and supports radiation hormesis. Fresh light is cast on the mechanisms of radiation hormesis and the potential benefits of low-dose ionizing radiation in preventing and treating a wide variety of inflammatory and proliferative diseases. It is proposed that these effects may derive from cellular communication via electromagnetic waves directed by DNA, with each cell acting as a quantum computer. Readers will also find close analysis of the negative impacts of radiophobia on many aspects of modern life, including attitudes to imaging technologies, licensing of nuclear power reactors, and preparedness for survival of nuclear war. The book will be of interest to researchers and scientists in radiobiology, radiation protection, health physics, medical physics, and radiology. Specifically, it will provide medical physicians, radiation oncologists, radiation epidemiologists, gerontologists, cell biologists, toxicologists, and nuclear engineers with a wide range of interesting facts and enlightening novel perspectives.

The new field of physical biology fuses biology and physics. New technologies have allowed researchers to observe the inner workings of the living cell, one cell at a time. With an abundance of new data collected on individual cells, including observations of individual molecules and their interactions, researchers are developing a quantitative, physics-based understanding of life at the molecular level. They are building detailed models of how cells use molecular circuits to gather and process information, signal to each other, manage noise and variability, and adapt to their environment. This book narrows down the scope of physical biology by focusing on the microbial cell. It explores the physical phenomena of noise, feedback, and variability that arise in the cellular information-processing circuits used by bacteria. It looks at the microbe from a physics perspective, to ask how the cell optimizes its function to live within the constraints of physics. It introduces a physical and information based - as opposed to microbiological - perspective on communication and signaling between microbes. The book is aimed at non-expert scientists who wish to understand some of the most important emerging themes of physical biology, and to see how they help us to understand the most basic forms of life.

The new field of physical biology fuses biology and physics. New technologies have allowed researchers to observe the inner workings of the living cell, one cell at a time. With an abundance of new data collected on individual cells, including observations of individual molecules and their interactions, researchers are developing a quantitative, physics-based understanding of life at the molecular level. They are building detailed models of how cells use molecular circuits to gather and process information, signal to each other, manage noise and variability, and adapt to their environment. This book narrows down the scope of physical biology by focusing on the microbial cell. It explores the physical phenomena of noise, feedback, and variability that arise in the cellular information-processing circuits used by bacteria. It looks at the microbe from a physics perspective, to ask how the cell optimizes its function to live within the constraints of physics. It introduces a physical and information based -- as opposed to microbiological -- perspective on communication and signaling between microbes. The book is aimed at non-expert scientists who wish to understand some of the most important emerging themes of physical biology, and to see how they help us to understand the most basic forms of life.

Magnetic Resonance Imaging is a very important clinical imaging tool. It combines different fields of physics and engineering in a uniquely complex way. MRI is also surprisingly versatile, 'pulse sequences' can be designed to yield many different types of contrast. This versatility is unique to MRI. This short book gives both an in depth account of the methods used for the operation and construction of modern MRI systems and also the principles of sequence design and many examples of applications. An important additional feature of this book is the detailed discussion of the mathematical principles used in building optimal MRI systems and for sequence design. The mathematical discussion is very suitable for undergraduates attending medical physics courses. It is also more complete than usually found in alternative books for physical scientists or more clinically orientated works.

Physics aims at explaining and describing as many processes of nature as possible. In this book the authors show several examples of its usefulness in the medical environment. The authors start from basic processes like bacterial diffusion, eye vision, through preclinical applications, to radiation treatment planning. This sampling allows profound examination of powerful tools, which physics provide for medical field. This book is intended for medical students at the doctoral or post-doctoral level, students of medical physics of master level or higher, or for medical doctors who want to have a deeper insight into their specialty.

This is an Open Access book. This book is a must-have for healthcare providers and researchers, public health specialists and policy makers who are interested and involved in cancer care in the Arab world. The Arab world consists of 22 countries, which are members of the Arab League and spanning over 13,132,327 km2 with over 423,000,000 population. Over the past few decades, the Arab world has witnessed a swift evolution in healthcare provision. Nonetheless, Arab countries have considerable variability in economic capabilities, resource allocation, and intellectual talent that inevitably reflect on access to modern cancer care and prevention. This book is authored by experts from the Arab world who provide vital information on cancer statistics and risk factors, available clinical care pathways and infrastructure, and prevention programs in their individual countries. The chapters also address specific challenges in each country and insights into future directions to achieve optimal care with conventional and novel diagnostics and therapies to keep up with the era of precision medicine. Special topics of interest and unique to the Arab world are also discussed, such as out of the country's medical tourism for cancer care and cancer care during war and conflict. Other special chapters include: Cancer research in the Arab world, Radiation therapy in Arab World and Pediatric Oncology in the Arab World Cancer in the Arab World is the first comprehensive book that addresses cancer care in depth in all Arab countries and it is endorsed by the prestigious Emirates Oncology Society.

The updated, second edition of the textbook Applied Physics for Radiation Oncology, originally published in 1996 is intended for both radiation therapists and students of radiation therapy. Chapters cover treatment planning, photon and electron dosimetry, brachytherapy, methods of dose calculation, isodose curves, beam-modifying devices, patient and beam geometry, radiation protection, and clinical use and operation of linear accelerators. The authors unify the principles of radiation therapy physics with the real world of clinical practice. A must for radiation therapists.

Compiled from sessions presented at the 2008 AAPM Summer School, which was held June 25-27, 2008 at the Baylor College of Medicine, Texas Medical Center, Houston, TX. Topics include PET and CT basics, diagnostic and clinical alications, PET/CT scanner designs and characteristics, scanner testing, PET ACR accreditation and acceptance testing, PET/CT simulation for therapy alications, shielding calculations and radiation safety, and site planning.

This practical guide offers an accessible introduction to the principles of MRI physics. Each chapter explains the why and how behind MRI physics. Readers will understand how altering MRI parameters will have many different consequences for image quality and the speed in which images are generated. Practical topics, selected for their value to clinical practice, include progressive changes in key MRI parameters, imaging time, and signal to noise ratio. A wealth of high quality illustrations, complemented by concise text, enables readers to gain a thorough understanding of the subject without requiring prior in-depth knowledge.

Many books cover the determination of rate constants under different experimental conditions and different chemical composition of the reaction mixture in their formal treatment of thermal kinetics. However, most textbooks are limited to simple mechanisms. In contrast, analogous treatment of photochemical reactions is limited to the publication of special reactions and investigations. Therefore, this book is aimed at providing an overall description of formal photokinetics covering a wider scope than the usual books on kinetics.

This volume attempts to provide a concise treatment of both thermo- and photochemical reactions by means of generalised differential equations, their set-up in matrix notation, and their solution by a formalism using numerical integration. At a first glance this approach might be surprising. However, apart from the argument that the didactics of thermal reactions are easier to handle than those of kinetics, the book provides additional reasons in support of this approach. Therefore, the formalism derived allows the evaluation of photochemical reactions, which are superimposed thermal reactions taking into account that the amount of light absorbed varies during the reaction. Because of this, any approximation, either by using total absorbance or negligible absorbance, will cause considerable errors even for simple reactions. The approach chosen to transform the axis of the radiation time into a new variable that includes the photokinetic factor proves that formal kinetics can be applied to thermal and photochemical reactions as well, and even allows the handling of solutions that cannot be homogenised or solid samples in which the concentration varies locally.By using this approach to introduce partial photochemical quantum yields even complex mechanisms can be determined quantitatively.

A large number of examples for different mechanisms and an introduction to many spectroscopic and chromatographic methods suitable for photokinetic analyses are provided to enable the reader to carry out a step-by-step evaluation of his own measurements. To reduce the number of formula in some chapters an appendix has been included which contains a detailed description of the calculus of some essential examples. For the convenience of the reader the following has been included:

- A large number of examples describing the use of formula

- A detailed description of the procedure for applying photokinetics to complex consecutive photoreactions

- An Internet address where the reader can find a tutorial for this procedure:
http: //www.barolo.ipc.uni-tuebingen.de/tele/photokin/

- A simple macro to help in programming his own evaluation procedure.

Intended for residents, dosimetrists, radiation therapists and junior medical physicists preparing for board certification in radiation oncology, this study guide contains more than 150 practice questions with answers and explanations. Page references to standard texts in the field are included with the answers, providing an opportunity for further study in areas requiring more knowledge .The major topics covered are: Basic Physics Principles (such as structure of matter, radioactivity, radiation quantities and units): Radiation Detectors, and Principles of Operation of Treatment Machines. This is an all-important aid in studying for board certification.

This volume documents the progress made in the design of complex artificial systems and in the study of intermolecular forces and interactions. It is possible, using appropriate strategies based on building blocks, to obtain very large supramolecular arrays containing several hundered atoms, where specific sites are occupied by the desired chemical functions. Such arrays can be used for such things as molecular recognition, self-organization, self-replication, selective reactivity, selective catalysis, photoinduced energy and electron transfer, signal processing, information storage and drug delivery.

MINIATURE LASER SOURCE TECHNOLOGY: Properties of High Power Semiconductor Lasers (D.F. Welch). DiodePumped Miniature Solid State Lasers (R. Pratesi). LIGHTTISUE INTERACTIONS AND OPTICS OF TISSUES: Biophysical Bases of LaserTissue Interactions (J.L. Boulnois). Optical and Thermal Modeling of Tissues: Dosimetry (M.J.C. van Gemert et al.). DIAGNOSTIC TECHNIQUES: Holography in Medical Diagnostics (G. von Bally). Laser Reflectance Spectroscopy of tissue (B. Wilson et al.). Monitoring and Imaging of Tissue Blood Flow by Coherent Light Scattering (G.E. Nilsson et al.). Transillumination Imaging (P.C. Jackson et al.). THERAPEUTIC TECHNIQUES: Lamps: Ultraviolet Radiation Lamps for the Phototherapy of Psoriasis (B.L. Diffey). Phototherapy and Photochemotherapy of Psoriasis (T.B. Fitzpatrick). Light Therapy for Neonatal Jaundice (J.F. Ennever). The Hazards of Cosmetic Tanning with UVA Radiation (A.R. Young). Lasers: The Role of Neodymium Yttrium Aluminum Garnet (Nd: YAG) Laser in Medicine (H. Barr et al.). Diode Laser Photocoagulation in Opthamology (R. Brancato et al.). FUTURE DIRECTIONS: Initial Applications and Potential of Miniature Lasers in Medicine (R. Pratesi). Future Trends in Laser Medicine (J.A. Parrish). 8 additional articles. Index of Contributors. Subject Index.

This book focuses on the conventional and emerging applications of radiations, which include radio waves and ultraviolet and gamma radiations. It discusses new techniques in radiation therapy and the effects of ionizing radiations on biological systems. The applications of radiations in the synthesis and use of nanoparticles along with the effects of hypergravity indicate a new trend. The book offers a concise account of the latest studies carried out so far and shows the new initiatives to be undertaken in the field of medicine and biology. It covers the medical use of radiations, such as ferrous sulfate-benzoic acid-xylenol orange dosimetry, Co-60 tomotherapy, radio-electro-chemotherapy, and fractional radiotherapy, and radiobiological effects, such as the effects of cell phone radiations on human health parameters and the combined effects of radiations and hypergravity on plants.

This book is one-of-a-kind comprehensive Radiosurgery Case Review Atlas that includes not only cranial and spinal cases, but also structural and functional radiosurgery ones. It categorizes the various radiosurgery-treated pathologies, presenting illustrative case reviews for each category. Each case includes a clinical summary, a treatment protocol, a radiosurgery dosimetry summary, the pre-radiosurgery images and the serial, short-term and long-term, follow up images illustrating the clinical and radiologic outcomes of the radiosurgery treatment. Offering the readers a handy step-by-step practical guide to perform safe and effective radiosurgery treatment, this will be a useful toolkit for neurosurgeons, radiation neuro-oncologists and radiation physicists (Radiosurgeons) conducting radiosurgery programs or involved in radiosurgery training.

Imaging is a critical component in the delivery of radiotherapy to patients with malignancy, and this book teaches the principles and practice of imaging specific to radiotherapy. Introductory chapters outline the basic principles of the available imaging modalities including x-rays, CT, ultrasound, MRI, nuclear medicine, and PET. Site specific chapters then cover the main tumour sites, reviewing optimal imaging techniques for diagnosis, staging, radiotherapy planning, and follow-up for each site. The important areas of radiation protection, exposure justification, and risks are also covered, exploring issues such as balancing radiation exposure with long-term risks of radiation effects, such as second cancer induction. This second edition has been fully revised and updated to reflect current techniques, and includes two brand new chapters on imaging for radiotherapy treatment verification, and the role of specialist MRI techniques and functional imaging for radiotherapy planning. With insights from experts in each field and over 200 illustrations, this comprehensive and easy-to-read guide will be an invaluable resource for radiation oncologists, clinical oncologists, and radiotherapists, both qualified and in training. ABOUT THE SERIES Radiotherapy remains the major non-surgical treatment modality for the management of malignant disease. It is based on the application of the principles of applied physics, radiobiology, and tumour biology to clinical practice. Each volume in the series takes the reader through the basic principles of the use of ionizing radiation and then develops this by individual sites. This series of practical handbooks is aimed at physicians both training and practising in radiotherapy, as well as medical physics, dosimetrists, radiographers, and senior nurses.

Bone is a complex biological material that consists of both an inorganic and organic phase, which undergoes continuous dynamic biological processes within the body. This complex structure and the need to acquire accurate data have resulted in a wide variety of methods applied in the physical analysis of bone in vivo and in vitro. Each method has its own strengths and applications depending on the information sought by the clinician or researcher. The Physical Measurement of Bone provides a detailed description of all the major methods of bone analysis, including brief comments on clinical evaluation. The physics of each method are introduced as well as a summary of practical procedures. The book is essential reading for practicing medical physicists and technicians who need to know about the many methods of bone analysis open to them, and, more importantly, the wide coverage provides a good introductory framework for students of medical physics and biomedical engineering.

This book comprehensively addresses the physics and engineering aspects of human physiology by using and building on first-year college physics and mathematics. Topics include the mechanics of the static body and the body in motion, the mechanical properties of the body, muscles in the body, the energetics of body metabolism, fluid flow in the cardiovascular and respiratory systems, the acoustics of sound waves in speaking and hearing, vision and the optics of the eye, the electrical properties of the body, and the basic engineering principles of feedback and control in regulating all aspects of function. The goal of this text is to clearly explain the physics issues concerning the human body, in part by developing and then using simple and subsequently more refined models of the macrophysics of the human body. Many chapters include a brief review of the underlying physics. There are problems at the end of each chapter; solutions to selected problems are also provided. This second edition enhances the treatments of the physics of motion, sports, and diseases and disorders, and integrates discussions of these topics as they appear throughout the book. Also, it briefly addresses physical measurements of and in the body, and offers a broader selection of problems, which, as in the first edition, are geared to a range of student levels. This text is geared to undergraduates interested in physics, medical applications of physics, quantitative physiology, medicine, and biomedical engineering.

• Can be utilized in either Algebra or Calculus-based courses and is available either as a standalone text or as a supplement for books like Cutnell PHYSICS, 5e or Halliday, Resnick, & Walker FUNDAMENTALS OF PHYSICS, 6e.
• Math level is Algebra & Trigonometry; however, a few examples require the use of integration and differentiation.
• Unlike competing supplements, Tuszinski offers both a wealth of engaging biomedical applications as well as quantitative problem-solving. The quantitative problem-solving is presented in the form of worked examples and homework problems.
• The quantitative problem-solving is presented in the form of worked examples and homework problems.
• The standard organization facilitates the integration of the material into most introductory courses.