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Studies On Polarised Light Spectroscopy
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Book Synopsis Studies on Polarised Light Spectroscopy by : Max Bergkvist
Download or read book Studies on Polarised Light Spectroscopy written by Max Bergkvist and published by Linköping University Electronic Press. This book was released on 2019-07-23 with total page 63 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis project focuses on measurements of dermal microcirculation during vascular provocations with polarised light spectroscopy. This is done with a non-invasive method commercially available as Tissue viability imaging (TiVi) which measures concentration and oxygenation of red blood cells in the papillary dermis. Three studies were done with human subjects and one with an animal model, to validate and compare the TiVi technique with laser Doppler flowmetry, which is an established method of measuring dermal microcirculation. The TiVi consists of a digital camera with polarisation filters in front of the flash and lens, with software for analysis of the picture. When taking a picture with the TiVi, the polarised light that is reflected on the skin surface is absorbed by the second filter over the lens (which is perpendicular to the first filter) but a portion of light penetrates the surface of the skin and is scattered when it is reflected on tissue components. This makes the light depolarised, passes the second filter, and produces a picture for analysis. The red blood cell (RBC) has a distinct absorption pattern that differs between red and green colour compared to melanin and other components of tissue. This difference is used by the software that calculates differences in each picture element and produces a measure of output which is proportional to the concentration of red blood cells. The oxygenation of RBC can also be calculated, as there is a difference in absorption depending on oxygen state. The first paper takes up possible sources of error such as ambient light, and the angle and distance of the camera. The main experiment was to investigate how the local heating reaction is detected with TiVi compared to LDF. In the second paper arterial and venous stasis are examined in healthy subjects with TiVi. The Third paper is an animal study where skin flaps were raised on pigs, and the vascular pedicle is isolated to enable control of inflow and outflow of blood.The measurements were made during partial venous, total venous, and total arterial occlusion. The TiVi recorded changes in the concentration of RBC, oxygenation and heterogeneity and the results were compared with those of laser Doppler flowmetry. In the fourth paper oxygenation and deoxygenation of RBC: s was studied. Studies were made on the forearms of healthy subjects who were exposed to arterial and venous occlusion. Simultaneous measurements were made with TiVi and Enhanced perfusion and oxygen saturation or EPOS, which is a new device that combines laser Doppler flowmetry and diffuse reflectance spectroscopy in one probe. With TiVi, one can measure RBC concentration and oxygenation in the area of an entire picture or in one or multiple user defined regions of interest (ROI). Methods such as laser Doppler flowmetry makes single point measurements, which is a potential source of error both because of the heterogeneity of the microcirculation, and that the circulation be insufficient in the margins of the investigated area. TiVi has been able to measure venous stasis more accurately than laser Doppler flowmetry, and venous stasis is the more common reason for flaps to fail. The TiVi is an accurate way to measure the concentration of RBC and trends in oxygenation of the dermal microcirculation. It has interesting possible applications for microvascular and dermatological research, monitoring of flaps, and diagnosis of peripheral vascular disease. Future clinical studies are needed as well as development of the user interface.
Book Synopsis Polarized Light in Optics and Spectroscopy by : David S. Kliger
Download or read book Polarized Light in Optics and Spectroscopy written by David S. Kliger and published by Elsevier. This book was released on 2012-12-02 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive introduction to polarized light provides students and researchers with the background and the specialized knowledge needed to fully utilize polarized light. It provides a basic introduction to the interaction of light with matter for those unfamiliar with photochemistry and photophysics. An in-depth discussion of polarizing optics is also given. Different analytical techniques are introduced and compared and introductions to the use of polarized light in various forms of spectroscopy are provided. - Starts at a basic level and develops tools for research problems - Discusses practical devices for controlling polarized light - Compares the Jones, Mueller, and Poincaré sphere methods of analysis
Book Synopsis Linear Dichroism and Circular Dichroism by : Bengt Nordén
Download or read book Linear Dichroism and Circular Dichroism written by Bengt Nordén and published by Royal Society of Chemistry. This book was released on 2019-05-02 with total page 305 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to optical anisotropy (linear dichroism, LD) and optical activity (circular dichroism, CD) as techniques for the study of structures and interactions of molecules in solution. The book covers the use of these techniques for both small and large molecular systems with particular emphasis being placed on proteins and nucleic acids. CD is a well-established technique and this book aims to explain how it can be used simply and effectively for new entrants to the field as well as covering more advanced techniques for experts. LD is often seen as a rather exotic method intended only for experienced spectroscopists. This book demonstrates that it is an approach with real utility that may be used by both students and scientists from graduate level onwards to give simple answers, which are not available from any other technique, to structural and kinetic questions. Much of the emphasis is on flow orientation of samples in solution phase. The book first describes the techniques and the information they can provide; it then goes on to give specific details on how to actually implement them, including a wide range of examples showing how LD and CD can help with * protein and nucleic acid secondary structure elucidation; * analysis of the formation and rearrangements of fibrous proteins and membrane proteins; * identification of the absolute configuration of small molecules; * determination of the orientation of small molecules in anisotropic media; * assignment of transition moment polarizations; * investigation of binding strengths and geometries of ligand-macromolecule complexes; * 3-D structure determination from LD, molecular replacement and MD modeling. The advantages of combined LD/CD studies are also outlined with examples of DNA/drug complexes and protein insertion into membranes. Taken together the book represents a comprehensive text on the theory and application of LD and CD in the chemical and biological sciences.
Book Synopsis Chiroptical Spectroscopy by : Prasad L. Polavarapu
Download or read book Chiroptical Spectroscopy written by Prasad L. Polavarapu and published by CRC Press. This book was released on 2016-10-03 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book details chiroptical spectroscopic methods: electronic circular dichroism (ECD), optical rotatory dispersion (ORD), vibrational circular dichroism (VCD), and vibrational Raman optical activity (VROA). For each technique, the text presents experimental methods for measurements and theoretical methods for analyzing the experimental data. It also includes a set of experiments that can be adopted for undergraduate teaching laboratories. Each chapter is written in an easy-to-follow format for novice readers, with necessary theoretical formalism in appendices for advanced readers.
Book Synopsis Optical Polarization in Biomedical Applications by : Valery V. Tuchin
Download or read book Optical Polarization in Biomedical Applications written by Valery V. Tuchin and published by Springer Science & Business Media. This book was released on 2006-10-12 with total page 285 pages. Available in PDF, EPUB and Kindle. Book excerpt: Optical Polarization in Biomedical Applications introduces key developments in optical polarization methods for quantitative studies of tissues, while presenting the theory of polarization transfer in a random medium as a basis for the quantitative description of polarized light interaction with tissues. This theory uses the modified transfer equation for Stokes parameters and predicts the polarization structure of multiple scattered optical fields. The backscattering polarization matrices (Jones matrix and Mueller matrix) important for noninvasive medical diagnostic are introduced. The text also describes a number of diagnostic techniques such as CW polarization imaging and spectroscopy, polarization microscopy and cytometry. As a new tool for medical diagnosis, optical coherent polarization tomography is analyzed. The monograph also covers a range of biomedical applications, among them cataract and glaucoma diagnostics, glucose sensing, and the detection of bacteria.
Book Synopsis Spectroscopy with Polarized Light by : Josef Michl
Download or read book Spectroscopy with Polarized Light written by Josef Michl and published by VCH Publishers. This book was released on 1995 with total page 596 pages. Available in PDF, EPUB and Kindle. Book excerpt: Corrected from the 1986 edition and now in paper, provides a conceptual and theoretical introduction to the use of optical spectroscopy for studying the optical properties of molecules. Begins at a level suitable for graduate students who have been exposed to elementary quantum mechanics, optics, and spectroscopy to explain the theory of the interaction between linearly polarized molecules and partially aligned samples, and the experimental techniques used to produce and measure such samples. The CiP data shows a different title. Annotation copyright by Book News, Inc., Portland, OR
Book Synopsis Elementary Polarization Spectroscopy by : Erik W. Thulstrup
Download or read book Elementary Polarization Spectroscopy written by Erik W. Thulstrup and published by John Wiley & Sons. This book was released on 1989-12-03 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book offers an elementary introduction to optical spectroscopy with polarized light. It is written at a level suitable for undergraduate students in chemistry and undergraduate or graduate students in related disciplines such as biochemistry, biology, chemical engineering and materials science. It emphasizes the qualitative concepts and deemphasizes mathematics, yet provides sufficient information and practical hints for experiments. With this book in hand, anyone who can measure an ordinary infrared, ultraviolet or visible absorption or fluorescence emission spectrum can measure a polarized one as well and learn far more about the sample.
Book Synopsis Fundamentals Of Optical, Spectroscopic And X-Ray Mineralogy by : Sachinath Mitra
Download or read book Fundamentals Of Optical, Spectroscopic And X-Ray Mineralogy written by Sachinath Mitra and published by New Age International. This book was released on 1996 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Primary Scope Of This Text-Book Covers The Transmission As Well As Reflection Optics Of Minerals And The Methods Of Their Studies. To Explain The Optical Behaviour Of Minerals, Some Relevant Concepts In Spectroscopy Have Been Introduced. This Book Fills The Need Of The Students To A Better Understanding Of The Physical Nature Of Minerals Through Studies In Ir-Visible-X-Ray Region.This Book Contains Seven Chapters Titled As: General Optics: Interactions Of Light With Matter, Study In Polarised Light, Optical (Absorption) Sepctroscopic Studies Of Minerals, Reflection Optics, Reflection Spectroscopy, Vibrational Spectroscopy: Infrared And Raman - An Outline, X-Ray Optics. It Also Offers As Appendices The Transmission, Reflection Properties And X-Ray Data Of Minerals.This Is The Only Book That Lucidly Introduces The Principles Of Modern Methods Of Mineral Optics In A Single Volume For The Students Of Graduate And Post-Graduate Levels.
Book Synopsis Circular Dichroism and Linear Dichroism by : Alison Rodger
Download or read book Circular Dichroism and Linear Dichroism written by Alison Rodger and published by Oxford University Press, USA. This book was released on 1997 with total page 170 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides an introduction to all those who wish to use the complementary spectroscopic techniques of optical activity (circular dichroism, CD) and optical anisotropy (linear dichroism, LD) for the study of the structure of molecules and interactions between molecules in solution. It emphasizes these techniques and how to use them for both low and high molecular weight molecules. The book begins by describing the principles behind CD and LD and how these techniques can be used in the laboratory without using advanced maths or quantum mechanics. The next chapters describe how both techniques may be applied to the study of biological macromolecules and give a detailed description of how they may be used on small molecules to investigate molecular and electronic structure. The final part contains theoretical derivations of all the equations required for the applications described previously. Specific molecular examples are used to illustrate concepts and to show the reader how to use the techniques in chemical and biological systems. Circular Dichroism and Linear Dichroism is an easy guide to what a prospective user of CD needs to know and explains how LD is not merely an exotic technique only to be practiced by experienced spectroscopists, but may be routinely and usefully employed as an aid to molecular structure determination.
Book Synopsis Modern Techniques for Circular Dichroism and Synchrotron Radiation Circular Dichroism Spectroscopy by : Bonnie Ann Wallace
Download or read book Modern Techniques for Circular Dichroism and Synchrotron Radiation Circular Dichroism Spectroscopy written by Bonnie Ann Wallace and published by IOS Press. This book was released on 2009 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt: Presents an account of circular dichroism (CD) spectroscopy and its application to structural biology. This book covers the methods of synchrotron radiation circular dichroism (SRCD) and linear dichroism (LD).
Book Synopsis The Vibrational Spectroscopy of Polymers by : D. I. Bower
Download or read book The Vibrational Spectroscopy of Polymers written by D. I. Bower and published by Cambridge University Press. This book was released on 1992-07-16 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt: Describes the theory and practice of infrared and Raman spectroscopy as applied to the study of the physical and chemical characteristics of polymers. Its purpose is to give the beginning researcher in the field a firm foundation and a starting point for the study of more advanced literature. To this end the book concentrates on the fundamentals of the theory and nomenclature, and on the discussion of well-documented illustrations of these fundamental principles, including many now-classic studies in the subject. No previous knowledge of either polymers or vibrational spectroscopy is assumed.
Book Synopsis Advanced Spectroscopic Methods to Study Biomolecular Structure and Dynamics by : Prakash Saudagar
Download or read book Advanced Spectroscopic Methods to Study Biomolecular Structure and Dynamics written by Prakash Saudagar and published by Elsevier. This book was released on 2022-09-28 with total page 560 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advanced Spectroscopic Methods to Study Biomolecular Structure and Dynamics presents the latest emerging technologies in spectroscopy and advances in established spectroscopic methods. The book presents a guide to research methods in biomolecular spectroscopy, providing comprehensive coverage of developments in the spectroscopic techniques used to study protein structure and dynamics. Seventeen chapters from leading researchers cover key aspects of spectroscopic methods, with each chapter covering structure, folding, and dynamics. This title will help researchers keep up-to-date on the latest novel methods and advances in established methods. - Presents current, emerging, and evolving advances and applications of spectroscopic techniques in the study of biomolecules, including proteins and nucleic acids - Discusses contemporary spectroscopic techniques used to study biomolecular structure, interaction, and dynamics
Book Synopsis New Directions in Research with Third-Generation Soft X-Ray Synchrotron Radiation Sources by : A.S. Schlachter
Download or read book New Directions in Research with Third-Generation Soft X-Ray Synchrotron Radiation Sources written by A.S. Schlachter and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Soft X-rays are a powerful probe of matter. They interact selectively with electrons in atoms and molecules and can be used to study atomic physics, chemical reactions, surfaces and solids, and biological entities. Over the past 20 years, synchrotrons have emerged as powerful sources of soft X-rays for experimental use. A new, third generation of synchrotron light sources is scheduled to start operation over the next few years, beginning in 1993. These facilities are distinguished by their ultra-low emittance electron beams and by their undulators -- precisely engineered magnetic devices that cause the electrons passing through them to produce highly coherent X-rays and ultraviolet light of unprecedented spectral brightness. This volume emphasizes third-generation sources that produce light in the 10 eV--10 KeV energy range. It describes potential applications ranging from the purely scientific to the commercially viable and includes chapters on the practical aspects of designing undulators and beam line optics. Unique in its coverage, the book is a vital addition to the library of any scientist who needs information on the world's most advanced imaging and spectroscopic techniques. (ABSTRACT) This volume emphasizes the applications of new third generation synchrotron radiation sources that produce light in the ultraviolet and soft X-ray range of the spectrum. The unprecedented brightness of this light enables experiments to be conducted with greatly increased spatial and spectral resolution. Scientists can exploit these properties for imaging and spectroscopic applications that until now were impossible or impractical. Prominent researchers in the field describe these applications and others made possible by the light's pulsed time structure and polarization. The volume also includes chapters on the practical aspects of designing undulators and beam line optics.
Book Synopsis Spectroscopy In Biochemistry by : J.Ellis Bell
Download or read book Spectroscopy In Biochemistry written by J.Ellis Bell and published by CRC Press. This book was released on 2018-05-04 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book has been written in part with the aim of providing a text which will be useful in teaching the biochemical applications of spectroscopy. This book will be of particular use to the biochemist or biologist who does not have a background in spectroscopy, but desires to find out what sort of information spectroscopy can provide. Attention was limited to those techniques most frequently used, and which at present have the widest applications.
Book Synopsis Nanoscale Spectroscopy and Its Applications to Semiconductor Research by : Y. Watanabe
Download or read book Nanoscale Spectroscopy and Its Applications to Semiconductor Research written by Y. Watanabe and published by Springer. This book was released on 2008-01-11 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fabrication technologies for nanostructured devices have been developed recently, and the electrical and optical properties of such nanostructures are a subject of advanced research. This book describes the different approaches to spectroscopic microscopy, i.e., Electron Beam Probe Spectroscopy, Spectroscopic Photoelectron Microscopy, and Scanning Probe Spectroscopy. It will be useful as a compact source of reference for the experienced reseracher, taking into account at the same time the needs of postgraduate students and nonspecialist researchers by using a tutorial approach throughout.
Book Synopsis Catalysis Volume 33 by : James Spivey
Download or read book Catalysis Volume 33 written by James Spivey and published by Royal Society of Chemistry. This book was released on 2021-06-16 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume looks at modern approaches to catalysis and reviews the extensive literature which bridges the gap from academic studies in the laboratory to practical applications in industry not only for catalysis field but also for environmental protection.
Book Synopsis Polarization Spectroscopy of Ionized Gases by : Sergi Kazantsev
Download or read book Polarization Spectroscopy of Ionized Gases written by Sergi Kazantsev and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 218 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polarization Spectroscopy of Ionized Gases describes the physical principles of the technique and its applications to remote sensing. Transport phenomena and local anisotropies can be studied. The theoretical part of the book considers the basic phenomena of the ordering of the velocities of fast exciting charged particles. The polarization of the outer electron shells of excited atoms or molecules is described, and a variety of effects are examined in detail. An integral equation is derived which gives the intensity and polarization of emitted lines. Methods for solving the equation are analyzed. Universal spectropolarimetric remote sensing has been applied to low pressure gas discharges in the laboratory and to non-thermal processes in the solar atmosphere. For researchers interested in the remote sensing of ionized gases.
