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Autoradiography for Biologists discusses the basic and practical aspects of various autoradiography techniques. It is composed of six chapters; each chapter covers a specific form of autoradiography technique. Chapter 1 discusses various theoretical aspects of autoradiography, such as radioactive decay, beta-particle absorption, photographic process, sensitivity, and resolving power. Chapters 2 to 6 discuss basic aspects of several forms of autoradiography, including macro-, stripping film, diffusible substances, liquid emulsion, and high resolution autoradiography. Practical and theoretical details of the technique, together with modifications made, are covered in each chapter. This book will be both an encouragement and a help to people wanting to apply autoradiography to the solution of biological problems.
Autoradiography in Biology and Medicine focuses on the applications of autoradiography in medicine and biology, including photographic processes, emulsions, and response of films to isotopes and x-rays. The book first offers information on the meaning of autoradiography, including the etymology of autoradiography, photographic emulsion as a scientific instrument, and the relationship of biologists and autoradiography. The publication then examines the photographic process and comparative response of commercial and scientific emulsions. Discussions focus on fixation, washing, emulsion, response of films to electrons, x-rays, and gamma rays, and response of films to beta ray spectra of isotopes. The text takes a look at commercial photographic materials for autoradiography, autoradiographic image, and resolution. The manuscript then reviews the estimation of dose and exposure time, sources of error, and techniques. Topics include chemical variables, estimation of exposure time, errors occurring during the preparation of the autoradiogram for exposure, and contour autoradiography. The book is a valuable reference for readers interested in autoradiography.
New edition of an introductory reference that covers all of the important aspects of electron microscopy from a biological perspective, including theory of scanning and transmission; specimen preparation; darkroom, digital imaging, and image analysis; laboratory safety; interpretation of images; and an atlas of ultrastructure. Generously illustrated with bandw line drawings and photographs. Annotation copyrighted by Book News, Inc., Portland, OR
The past decade has seen a remarkable increase in the use of electron microscopy as a researm tool in biology and medicine. Thus, most institu tions of higher learning now boast several electron optical laboratories having various levels of sophistication. Training in the routine use of elec tron optical equipment and interpretation of results is no longer restricted to a few prestigious centers. On the other hand, temniques utilized by researm workers in the ultrastructural domain have become extremely diverse and complex. Although a large number of quite excellent volumes of electron microscopic temnique are now dedicated to the basic elements available whim allow the novice to acquire a reasonable introduction to the field, relatively few books have been devoted to a discussion of more ad vanced temnical aspects of the art. It was with this view that the present volume was conceived as a handy reference for workers already having some background in the field, as an information source for those wishing to shift efforts into more promising temniques, or for use as an advanced course or seminar guide. Subject matter has been mosen particularly on the basis of pertinence to present researm activities in biological electron microscopy and emphasis has been given those areas whim seem destined to greatly expand in useful ness in the near future.
Here is a complete guide to the wide variety of uses of radioisotopes in biological investigations. A useful alternative to multiple sources, the book provides an informative introduction to the theory behind this growing technology, as well as practical advice on isotope and equipment choice, radiation protection, and safety measures. Procedural advice on in vivo and in vitro labelling, autoradiography, and immunoassay, will be applicable in several types of investigations, and practitioners will find the convenient summaries of U.S. and U.K. legislation governing these materials to be a particularly useful timesaver.
In 1957 two young scientists, Matthew Meselson and Frank Stahl, produced a landmark experiment confirming that DNA replicates as predicted by the double helix structure Watson and Crick had recently proposed. It also gained immediate renown as a “most beautiful” experiment whose beauty was tied to its simplicity. Yet the investigative path that led to the experiment was anything but simple, Frederic L. Holmes shows in this masterful account of Meselson and Stahl’s quest. This book vividly reconstructs the complex route that led to the Meselson-Stahl experiment and provides an inside view of day-to-day scientific research--its unpredictability, excitement, intellectual challenge, and serendipitous windfalls, as well as its frustrations, unexpected diversions away from original plans, and chronic uncertainty. Holmes uses research logs, experimental films, correspondence, and interviews with the participants to record the history of Meselson and Stahl’s research, from their first thinking about the problem through the publication of their dramatic results. Holmes also reviews the scientific community’s reception of the experiment, the experiment’s influence on later investigations, and the reasons for its reputation as an exceptionally beautiful experiment.
Instrumentation is central to the study of physiology and genetics in living organisms, especially at the molecular level. Numerous techniques have been developed to address this in various biological disciplines, creating a need to understand the physical principles involved in the operation of research instruments and the parameters required in using them. Introduction to Instrumentation in Life Sciences fills this need by addressing different aspects of tools that hold the keys to cutting-edge research and innovative applications, from basic techniques to advanced instrumentation. The text describes all topics so even beginners can easily understand the theoretical and practical aspects. Comprehensive chapters encompass well-defined methodology that describes the instruments and their corresponding applications in different scientific fields. The book covers optical and electron microscopy; micrometry, especially in microbial taxonomy; pH meters and oxygen electrodes; chromatography for separation and purification of products from complex mixtures; spectroscopic and spectrophotometric techniques to determine structure and function of biomolecules; preparative and analytical centrifugation; electrophoretic techniques; x-ray microanalysis including crystallography; applications of radioactivity, including autoradiography and radioimmunoassays; and fermentation technology and subsequent separation of products of interest. The book is designed to serve a wide range of students and researchers in diversified fields of life sciences: pharmacy, biotechnology, microbiology, biochemistry, and environmental sciences. It introduces different aspects of basic experimental methods and instrumentation. The book is unique in its broad subject coverage, incorporating fundamental techniques as well as applications of modern molecular and proteomic tools that are the basis for state-of-the-art research. The text emphasizes techniques encountered both in practical classes and in high-throughput environments used in modern industry. As a further aid to students, the authors provide well-illustrated diagrams to explain the principles and theories behind the instruments described.