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Books > Science & Mathematics > Science: general issues > Scientific equipment & techniques, laboratory equipment
This volume is a new follow-up volume that complements Dynamic Light Scattering (1993) by the same author. The volume is directed to the recent development in the light scattering technique and to describing a wide spectrum of its applications. Both the theoretical development and utilization are traced by authors who are expert in their fields. Development in static light scattering as applied to simple liquids, polymer solutions, and multi-component polymer mixtures are dealt with. The scattering theory of colloidal dispersions is described and scattering from rod-like polyelectolytes is reviewed. There are chapters on concentrated polymer systems, aggregation phenomena, polymer-polymer interactions, polyelectrolytes in solution. Emphasis is given to more complex systems, for example, ternary polymer systems, complex micellar systems, and block copolymers in the ordered and disordered states. Low-angle light scattering is reviewed, as well as simultaneous static and dynamic light scattering. The determination of particle size distributions and combined chromatographic light scattering techniques are also treated.
The book presents a clear and comprehensive review of the current status of the holographic microscopy with discussion of the positive and negative features of classical and holographic methods for solving the problem of three-dimesional (3D) imaging of phase microscopic objects. Classical and holographic methods of phase, interference and polarization contrast are discussed. Combination of the developed holographic methods with the methods of digital image processing allowed creating the digital holographic interference microscope (DHIM). The first 3D images of native phase microscopic objects such as blood cells were obtained using the DHIM. The results of DHIM application for study of blood erythrocytes, thin films, micro-crystals are presented.
Arising no doubt from its pre-eminence as a natural liquid, water has always been considered by chemists as the original solvent in which very varied chemical reactions can take place, both for preparational and for analytical purposes. This explains the very long-standing interest shown in the study of aqueous solutions. In this con nection, it must be stressed that the theory of Arrhenius and Ostwald (1887-1894) on electrolytic dissociation, was originally devised solely for solutions in water and that the first true concept of acidity resulting from this is linked to the use of this solvent. The more recent development of numerous physico-chemical measurement methods has made possible an increase of knowledge in this area up to an extremely advanced degree of systematization. Thus today we have available both a very large amount of experimental data, together with very refined methods of deduction and of quantitative treatment of chemical reactions in solution which enable us to make the fullest use of this data. Nevertheless, . it appears quite evident at present that there are numerous chemical processes which cannot take place in water, and that its use as a solvent imposes 2 INTRODUCTION limitations. In order to overcome these limitations, it was natural that interest should be attracted to solvents other than water and that the new possibilities thus opened up should be explored."
We are now accustomed to conceive of science as an instrumental
activity, producing numbers, measurements and graphs by means of
sophisticated devices. This book investigates the historical
process that gave rise to this instrumental culture. The
contributors trace the displacement of instruments across the
globe, the spread of practices or precision and the circulation and
appropriation of skills and knowledge.
Focusing on the two seventeenth-century pioneers of microscopic discovery, the Dutchmen Jan Swammerdam and Antoni van Leeuwenhoek, the author demonstrates that their uneasiness with their social circumstances spurred their discoveries. Ruestow argues that while aspects of Dutch culture impeded serious research with the microscope, the contemporary culture shaped how Swammerdam and Leeuwenhoek responded to what they saw through the lens. For those interested in the history of science, this book considers the impact of institutionalization on microscopic research, and dissects the cultural, social and emotional circumstances that shaped early microscopic discovery.
Biomedical photonics is currently one of the fastest growing fields, connecting research in physics, optics, and electrical engineering coupled with medical and biological applications. It allows for the structural and functional analysis of tissues and cells with resolution and contrast unattainable by any other methods. However, the major challenges of many biophotonics techniques are associated with the need to enhance imaging resolution even further to the sub-cellular level as well as translate them for in vivo studies. The tissue optical clearing method uses immersion of tissues into optical clearing agents (OCAs) that reduces the scattering of tissue and makes tissue more transparent and this method has been successfully used ever since. This book is a self-contained introduction to tissue optical clearing, including the basic principles and in vitro biological applications, from in vitro to in vivo tissue optical clearing methods, and combination of tissue optical clearing and various optical imaging for diagnosis. The chapters cover a wide range of issues related to the field of tissue optical clearing: mechanisms of tissue optical clearing in vitro and in vivo; traditional and innovative optical clearing agents; recent achievements in optical clearing of different tissues (including pathological tissues) and blood for optical imaging diagnosis and therapy. This book provides a comprehensive account of the latest research and possibilities of utilising optical clearing as an instrument for improving the diagnostic effectiveness of modern optical diagnostic methods. The book is addressed to biophysicist researchers, graduate students and postdocs of biomedical specialties, as well as biomedical engineers and physicians interested in the development and application of optical methods in medicine. Key features: The first collective reference to collate all known knowledge on this topic Edited by experts in the field with chapter contributions from subject area specialists Brings together the two main approaches in immersion optical clearing into one cohesive book
A typical optical system is composed of three basic components: a source, a detector, and a medium in which the optical energy propagates. Many textbooks cover sources and detectors, but very few cover propagation in a comprehensive way, incorporating the latest progress in theory and experiment concerning the propagating medium. This book will fulfill that need. It is the first comprehensive and self-contained book on this topic. It will be a useful reference book for researchers, and a textbook for courses like Laser Light Propagation, Solid State Optics, and Optical Propagation in the Atmosphere.
In spite of the wide variety and complexity of biological materials, nucleic acids are ubiquitous. DNA is becoming the bioanalyte of choice due to the vast amount of information embedded in its sequence, its robust chemical nature and the range of highly sensitive analytical techniques that have been developed. The results of such analyses can have an important impact on our society both commercially and in terms of the quality of life. Absolute confidence in the data generated is therefore of the utmost importance. This book, produced by LGC as part of the VAM (Valid Analytical Measurement) Programme, introduces the issues of validation and quality to the bioanalytical community, specifically addressing DNA-based analyses. It aims to raise awareness of the factors that can influence the validity of DNA analysis and the production of quality data. Emphasis is placed on VAM principles, as well as additional challenges that are associated with the analysis of real samples, for example, complex food matrices or forensic samples that have been subjected to environmental insult. Information is collated from a variety of sources including literature, discussions and LGC research, and offers constructive advice where possible.
Traditionally experimentation has been understood as an activity performed within the laboratory, but in the twenty-first century this view is being challenged. Schwarz uses ecological and environmental case studies to show how scientific experiments can transcend the laboratory.
Laymen often consider modern laboratory research to be based on an endless array of sophisticated technologies whose complex capabilities are as important to the outcome of any project as the inventiveness and creativity of the scientists who employ them. Scientists at times may share this point of view until they are con fronted by unexpected findings that demand new approaches, and they discover that yesterday's "sophisticated tools" are today's "blunt instruments." This experience provides a more sobering view of the current state of our scientific methods. It also serves as an impetus for the further development of technology that prepares us for the next stage of advance. Immunologists were confronted by such a technological crises in the late 1970s when they finally were forced to admit that poly clonal antibodies, although quite sensitive reagents, were not spe cific enough to answer many of the questions then confronting virologists and tumor biologists. The answer to the need for specific ity came with the development of monoclonal antibody technology. In the last ten years there have been considerable advances in monoclonal antibody techniques. Today these reagents are much more versatile than they were initially and can be applied to a broad range of problems. Still, most workers who are using these anti bodies are convinced that their potential is far from exhausted, and that at least in some fields we are currently in the early stages of learning how to use them properly.
The purpose of this book is to provide the most comprehensive,
easy-to-use, and informative guide on light microscopy. "Light and
Video Microscopy" will prepare the reader for the accurate
interpretation of an image and understanding of the living cell.
With the presentation of geometrical optics, it will assist the
reader in understanding image formation and light movement within
the microscope. It also provides an explanation of the basic modes
of light microscopy and the components of modern electronic imaging
systems and guides the reader in determining the physicochemical
information of living and developing cells, which influence
interpretation.
Heavy electrons are found among a number of lanthanide and actinide compounds, and are characterized by a large effective mass which becomes comparable to the mass of a muon. Heavy electrons exhibit rich phenomena such as unconventional superconductivity, weak anti- ferromagnetism, or pseudo meta-magnetism. This book is intended not only as a monograph, but can readily serve as an advanced textbook on theoretical and experimental physics of strongly correlated electrons. Over the last two decades, heavy electrons have been the focus of very active experimental and theoretical studies. Many established ideas and techniques have been insufficient to describe and understand heavy electrons and their impact properly. On the theoretical side, quantum fluctuations make mean-field theories difficult to handle, while on the experimental side, extreme conditions such as strong magnetic fields and pressure at ultra-low temperatures may be required. Heavy electron systems as described in this book offer a case study for applying and testing most of the major tools in theoretical and experimental condensed matter physics. Graduate students and researchers working on strongly correlated condensed matter systems will find in this book a comprehensive introduction and many examples how conventional concepts of solids may work or not work, and how they can be refined and sharpened in the context of heavy electron systems.
This dissertation examines the cultural and educational history of central Missouri between 1820 and 1860, and in particular, the issue of master-slave relationships and how they affected education (broadly defined as the transmission of Southern culture). Although Missouri had one of the lowest slave populations during the Antebellum period, Central Missouri - or what became known as Little Dixie - had slave percentages that rivaled many regions and counties of the Deep South. However, slaves and slave owners interacted on a regular basis, which affected cultural transmission in the areas of religion, work, and community. Generally, slave owners in Little Dixie showed a pattern of paternalism in all these areas, but the slaves did not always accept their masters' paternalism, and attempted to forge a life of their own.
The combination of electron microscopy with transmitted light
microscopy (termed correlative light and electron microscopy; CLEM)
has been employed for decades to generate molecular identification
that can be visualized by a dark, electron-dense precipitate. This
new volume of "Methods in Cell Biology" covers many areas of CLEM,
includinga brief history and overview on CLEM methods, imaging of
intermediate stages of meiotic spindle assembly in "C. elegans"
embryos using CLEM, and capturing endocytic segregation events with
HPF-CLEM.
Fluctuations in the level and pattern of international trade have a profound effect on the economies of less developed countries. This book explores the relationship between international trade and globl development through a series of essays which relate advances in trade theory to key issues in trade policy. The book, first published in 1991, is in honour of Jagdish Bhagwati and reflects the range and significance of his contributions to international economics.
Scanning electr on microscopy (SEM) and x-ray microanalysis can produce magnified images and in situ chemical information from virtually any type of specimen. The two instruments generally operate in a high vacuum and a very dry environment in order to produce the high energy beam of electrons needed for imaging and analysis. With a few notable exceptions, most specimens destined for study in the SEM are poor conductors and composed of beam sensitive light elements containing variable amounts of water. In the SEM, the imaging system depends on the specimen being sufficiently electrically conductive to ensure that the bulk of the incoming electrons go to ground. The formation of the image depends on collecting the different signals that are scattered as a consequence of the high energy beam interacting with the sample. Backscattered electrons and secondary electrons are generated within the primary beam-sample interactive volume and are the two principal signals used to form images. The backscattered electron coefficient ( ? ) increases with increasing atomic number of the specimen, whereas the secondary electron coefficient ( ? ) is relatively insensitive to atomic number. This fundamental diff- ence in the two signals can have an important effect on the way samples may need to be prepared. The analytical system depends on collecting the x-ray photons that are generated within the sample as a consequence of interaction with the same high energy beam of primary electrons used to produce images.
Fit-for-purpose is a phrase familiar to all users of analytical data, who need to be assured that data provided by laboratories is both appropriate and of the required quality. Quality in the Food Analysis Laboratory surveys the procedures that a food analysis laboratory must consider to meet such requirements. The need to introduce quality assurance, the different quality models that are available and the legislative requirements are considered. Specific aspects of laboratory practice and particular areas of accreditation which may cause problems for analytical laboratories are also discussed. Covering for the first time those areas of direct importance to food analysis laboratories, this unique book will serve as an aid to those laboratories when introducing new measures and justifying those chosen.
The effects of very high pressures on various physical systems are of great scientific interest and experiments in this field are an increasingly important activity. Literature on high pressure methods is however scarce and largely out of date. This book is the first to present a broad and thorough coverage of methods and applications. It also provides a technological overview of high-pressure research in the Soviet Union much of which has never been presented in Western literature. This book is intended for graduate students specialising in high pressure experiments in physics, chemistry, and biology, and for scientists coming to high pressure experimentation for the first time as well as those already working in the field.
Industrial Analysis with Vibrational Spectroscopy is an integrated work which emphasises the synergy and complementary nature of the techniques of infrared and Raman spectroscopy in industrial laboratories. The book is written in a pragmatic and straight-forward manner and is illustrated throughout with examples of real-world, everyday problems and applications. It provides a developed, realistic insight into industrial analysis with vibrational spectroscopy for both undergraduate and academic researcher, while additionally providing a straight-forward working tool of value to the industrial laboratory worker.
Fluctuations in the level and pattern of international trade have a profound effect on the economies of less developed countries. This book explores the relationship between international trade and globl development through a series of essays which relate advances in trade theory to key issues in trade policy. The book, first published in 1991, is in honour of Jagdish Bhagwati and reflects the range and significance of his contributions to international economics.
This volume is dedicated to a description of the instruments,
samples, protocols, and analyses that belong to cryo-EM. It
emphasizes the relatedness of the ideas, intrumentation, and
methods underlying all cryo-EM approaches which allow
practictioners to easily move between them. Within each section,
the articles are ordered according to the most common symmetry of
the sample to which their methods are applied. * Includes time-tested core methods and new innovations applicable to any researcher * Methods included are useful to both established researchers and newcomers to the field * Relevant background and reference information given for procedures can be used as a guide
This new volume, Microscopy Applied to Materials Sciences and Life Sciences. focuses on recent theoretical and practical advances in polymers and their blends, composites, and nanocomposites related to their microscopic characterization. It highlights recent accomplishments and trends in the field of polymer nanocomposites and filled polymers related to microstructural characterization. This book gives an insight and better understanding into the development in microscopy as a tool for characterization. The book emphasizes recent research work in the field of microscopy in life sciences and materials sciences mainly related to its synthesis, characterizations, and applications. The book explains the application of microscopic techniques in life sciences and materials sciences, and their applications and state of current research carried out. The book aims to foster a better understanding of the properties of polymer composites by describing new techniques to measure microstructure property relationships and by utilizing techniques and expertise developed in the conventional filled polymer composites. Characterization techniques, particularly microstructural characterization, have proven to be extremely difficult because of the range of length-scales associated with these materials. Topics include: *Instrumentation and Techniques: advances in scanning probe microscopy, SEM, TEM, OM. 3D imaging and tomography, electron diffraction techniques and analytical microscopy, advances in sample preparation techniques in-situ microscopy, correlative microscopy in life and material sciences, low voltage electron microscopy. *Life Sciences: Structure and imaging of biomolecules, live cell imaging, neurobiology, organelles and cellular dynamics, multi-disciplinary approaches for medical and biological sciences, microscopic application in plants, microorganism and environmental science, super resolution microscopy in biological sciences. *Materials Sciences: materials for nanotechnology, metals alloys and inter-metallic, ceramics, composites, minerals and microscopy in cultural heritage, thin films, coatings, surfaces and interfaces, carbon based materials, polymers and soft materials and self-assembled materials, semiconductors and magnetic materials. Polymers and inorganic nanoparticles. The volume will be of significant interest to scientists working on the basic issues surrounding polymers, nanocomposites, and nanoparticulate-filled polymers, as well as those working in industry on applied problems, such as processing. Because of the multidisciplinary nature of this research, the book will be valuable to chemists, materials scientists, physicists, chemical engineers, and processing specialists who are involved and interested in the future frontiers of blends.
Offering deep insight into the connections between design choice and the resulting statistical analysis, Design of Experiments: An Introduction Based on Linear Models explores how experiments are designed using the language of linear statistical models. The book presents an organized framework for understanding the statistical aspects of experimental design as a whole within the structure provided by general linear models, rather than as a collection of seemingly unrelated solutions to unique problems. The core material can be found in the first thirteen chapters. These chapters cover a review of linear statistical models, completely randomized designs, randomized complete blocks designs, Latin squares, analysis of data from orthogonally blocked designs, balanced incomplete block designs, random block effects, split-plot designs, and two-level factorial experiments. The remainder of the text discusses factorial group screening experiments, regression model design, and an introduction to optimal design. To emphasize the practical value of design, most chapters contain a short example of a real-world experiment. Details of the calculations performed using R, along with an overview of the R commands, are provided in an appendix. This text enables students to fully appreciate the fundamental concepts and techniques of experimental design as well as the real-world value of design. It gives them a profound understanding of how design selection affects the information obtained in an experiment.
In situ hybridization is a technique that allows for the visualization of specific DNA and RNA sequences in individual cells, and is an especially important method for studying nucleic acids in heterogeneous cell populations. in situ Hybridization in Electron Microscopy reviews the three main methods developed for the ultrastructural visualization of genes: ° hybridization on ultrathin sections of tissue embedded in hydrophilic resin (post-embedding method) ° hybridization prior to embedding (pre-embedding) ° hybridization on ultrathin sections of frozen tissue (frozen tissue method). For each technique, the different stages are described in detail: the preparation of tissue, pretreatment, hybridization, and visualization of the hybridization products. The book combines theory and practice, starting with the basic principles, then breaking down the experimental process into successive steps illustrated by numerous diagrams, detailed protocols, and tables. This is all done in a format that uses parallel columns to convey useful comments next to the theory and practical details alongside each stage of the protocol. Additionally, the summary tables provide the criteria for choosing the probe type and technique, and a detailed index aids in the search for information. in situ Hybridization In Electron Microscopy is an essential companion for applying these methods at the electron microscopic level.
Bored of the same old dinner-party chitchat? Spice up your soirees, impress your guests and show up your brother-in-law with these hilarious, and sometimes dangerous, after-dinner tricks and challenges. Twenty-one daredevil tricks are illustrated along with step-by-step instructions and explanations of the science behind them. From sabering a bottle of champagne to hammering a needle through a coin, each of these feats is guaranteed to wow your guests. |
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