Electron Crystallography


Electron Crystallography
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Structural Electron Crystallography


Structural Electron Crystallography
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Author : D.L. Dorset
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-06-29

Structural Electron Crystallography written by D.L. Dorset and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-06-29 with Science categories.


This authoritative text on electron diffraction and crystal structure analysis is the first to describe direct phasing techniques in electron crystallography. Written for electron diffractionists and electron microscopists, this fully illustrated volume presents methods for specimen preparation, data collection and structure analysis. Chapters feature numerous detailed examples of actual structure analyses and contain over 350 illustrations.



Electron Crystallography


Electron Crystallography
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Author : D. Dorset
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-04-17

Electron Crystallography written by D. Dorset and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-04-17 with Science categories.


The re-emergent field of quantitative electron crystallography is described by some of its most eminent practitioners. They describe the theoretical framework for electron scattering, specimen preparation, experimental techniques for optimum data collection, the methodology of structure analysis and refinement, and a range of applications to inorganic materials (including minerals), linear polymers, small organic molecules (including those used in nonlinear optical devices), incommensurately modulated structures (including superconductors), alloys, and integral membrane proteins. The connection between electron crystallography and X-ray crystallography is clearly defined, especially in the utilisation of the latest methods for direct determination of crystallographic phases, as well as the unique role of image analysis of high-resolution electron micrographs for phase determination. Even the aspect of multiple beam dynamic diffraction (once dreaded because it was thought to preclude ab initio analysis) is considered as a beneficial aid for symmetry determination as well as the elucidation of crystallographic phases, and as a criterion for monitoring the progress of structure refinement. Whereas other texts have hitherto preferentially dealt with the analysis of electron diffraction and image data from thin organic materials, this work discusses - with considerable optimism - the prospects of looking at `harder' materials, composed of heavier atoms. Audience: Could be used with profit as a graduate-level course on electron crystallography. Researchers in the area will find a statement of current progress in the field.



Electron Crystallography


Electron Crystallography
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Author : Thomas E. Weirich
language : en
Publisher: Springer Science & Business Media
Release Date : 2006-08-18

Electron Crystallography written by Thomas E. Weirich and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006-08-18 with Science categories.


During the last decade we have been witness to several exciting achievements in electron crystallography. This includes structural and charge density studies on organic molecules complicated inorganic and metallic materials in the amorphous, nano-, meso- and quasi-crystalline state and also development of new software, tailor-made for the special needs of electron crystallography. Moreover, these developments have been accompanied by a now available new generation of computer controlled electron microscopes equipped with high-coherent field-emission sources, cryo-specimen holders, ultra-fast CCD cameras, imaging plates, energy filters and even correctors for electron optical distortions. Thus, a fast and semi-automatic data acquisition from small sample areas, similar to what we today know from imaging plates diffraction systems in X-ray crystallography, can be envisioned for the very near future. This progress clearly shows that the contribution of electron crystallography is quite unique, as it enables to reveal the intimate structure of samples with high accuracy but on much smaller samples than have ever been investigated by X-ray diffraction. As a tribute to these tremendous recent achievements, this NATO Advanced Study Institute was devoted to the novel approaches of electron crystallography for structure determination of nanosized materials.



Electron Crystallography


Electron Crystallography
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Author : Devinder Singh
language : en
Publisher: BoD – Books on Demand
Release Date : 2020-07-22

Electron Crystallography written by Devinder Singh and has been published by BoD – Books on Demand this book supported file pdf, txt, epub, kindle and other format this book has been release on 2020-07-22 with Science categories.


In the quantitative determination of new structures, micro-/nano-crystalline materials pose significant challenges. The different properties of materials are structure-dependent. Traditionally, X-ray crystallography has been used for the analysis of these materials. Electron diffraction is a technique that complements other techniques; for example, single crystal X-ray diffraction and powder X-ray diffraction for determination of structure. Electron diffraction plays a very important role when crystals are very small using single crystal X-ray diffraction or very complex for structure solution by powder X-ray diffraction. With the introduction of advanced methodologies, important methods for crystal structural analysis in the field of electron crystallography have been discovered, such as rotation electron diffraction (RED) and automated electron diffraction tomography (ADT). In recent years, large numbers of crystal structures have been solved using electron crystallography.



Electron Crystallography Of Organic Molecules


Electron Crystallography Of Organic Molecules
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Author : J.R. Fryer
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06

Electron Crystallography Of Organic Molecules written by J.R. Fryer and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.


Maximum Entropy (ME) techniques have found widespread applicability in the reconstruction of incomplete or noisy data. These techniques have been applied in many areas of data analysis including imaging, spectroscopy, and scattering [Gull and Skilling, 1984]. The techniques have proven particularly useful in astronomy [Narayan and Nityanada, 1984]. In many of these applications the goal of the reconstruction is the detection of point objects against a noisy background. In this work we investigate the applicability of ME techniques to data sets which have strong components which are periodic in space or time. The specific interest in our laboratory is High Resolution Electron Micrographs of beam sensitive materials. However, ME techniques are of general interest for all types of data. These data mayor may not have a spatial or temporal character. Figure 1 shows an HREM image of the rigid-rod polymer poly(paraphenylene benzobisoxazole) (PBZO). The 0.55 nm spacings in the image correspond to the lateral close-packing between the extended polymer molecules. Near the center of this crystallite there is evidence for an edge dislocation. In HREM images both the frequency and position of the infonnation is important for a proper interpretation. Therefore, it is necessary to consider how image processing affects the fidelity of this information in both real and Fourier space.



Electron Crystallography Of Biological Macromolecules


Electron Crystallography Of Biological Macromolecules
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Author : Robert M. Glaeser
language : en
Publisher: Oxford University Press, USA
Release Date : 2007

Electron Crystallography Of Biological Macromolecules written by Robert M. Glaeser and has been published by Oxford University Press, USA this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with Science categories.


This book provides a complete introduction to all major topics needed in order to use electron microscopy as a research tool in structural biology. Written by a group of 5 well-known pioneers of the field of electron cryo-microscopy of biological macromolecules, this book offers a depth of knowledge and expertise that could only be replicated from the primary literature with great difficulty.



Uniting Electron Crystallography And Powder Diffraction


Uniting Electron Crystallography And Powder Diffraction
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Author : Ute Kolb
language : en
Publisher: Springer
Release Date : 2012-12-20

Uniting Electron Crystallography And Powder Diffraction written by Ute Kolb and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-20 with Science categories.


The polycrystalline and nanocrystalline states play an increasingly important role in exploiting the properties of materials, encompassing applications as diverse as pharmaceuticals, catalysts, solar cells and energy storage. A knowledge of the three-dimensional atomic and molecular structure of materials is essential for understanding and controlling their properties, yet traditional single-crystal X-ray diffraction methods lose their power when only polycrystalline and nanocrystalline samples are available. It is here that powder diffraction and single-crystal electron diffraction techniques take over, substantially extending the range of applicability of the crystallographic principles of structure determination. This volume, a collection of teaching contributions presented at the Crystallographic Course in Erice in 2011, clearly describes the fundamentals and the state-of-the-art of powder diffraction and electron diffraction methods in materials characterisation, encompassing a diverse range of disciplines and materials stretching from archeometry to zeolites. As such, it is a comprehensive and valuable resource for those wishing to gain an understanding of the broad applicability of these two rapidly developing fields.



Electron Crystallography


Electron Crystallography
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Author : Xiaodong Zou
language : en
Publisher:
Release Date : 2016-07-30

Electron Crystallography written by Xiaodong Zou and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2016-07-30 with categories.


In the modern world of ever smaller devices and nanotechnology, electron crystallography emerges as the most important method capable of determining the structure of minute objects down to the size of individual atoms. Crystals of only a few millionths of a millimetre are studied. This is the first textbook explaining how this is done.



Fundamentals Of Crystallography Powder X Ray Diffraction And Transmission Electron Microscopy For Materials Scientists


Fundamentals Of Crystallography Powder X Ray Diffraction And Transmission Electron Microscopy For Materials Scientists
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Author : Dong ZhiLi
language : en
Publisher: CRC Press
Release Date : 2022-05-23

Fundamentals Of Crystallography Powder X Ray Diffraction And Transmission Electron Microscopy For Materials Scientists written by Dong ZhiLi and has been published by CRC Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2022-05-23 with Science categories.


The structure–property relationship is a key topic in materials science and engineering. To understand why a material displays certain behaviors, the first step is to resolve its crystal structure and reveal its structure characteristics. Fundamentals of Crystallography, Powder X-ray Diffraction, and Transmission Electron Microscopy for Materials Scientists equips readers with an in-depth understanding of using powder x-ray diffraction and transmission electron microscopy for the analysis of crystal structures. Introduces fundamentals of crystallography Covers XRD of materials, including geometry and intensity of diffracted x-ray beams and experimental methods Describes TEM of materials and includes atomic scattering factors, electron diffraction, and diffraction and phase contrasts Discusses applications of HRTEM in materials research Explains concepts used in XRD and TEM lab training Based on the author’s course lecture notes, this text guides materials science and engineering students with minimal reliance on advanced mathematics. It will also appeal to a broad spectrum of readers, including researchers and professionals working in the disciplines of materials science and engineering, applied physics, and chemical engineering.



Electron Crystallography Of Soluble And Membrane Proteins


Electron Crystallography Of Soluble And Membrane Proteins
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Author : Ingeborg Schmidt-Krey
language : en
Publisher: Humana Press
Release Date : 2012-11-07

Electron Crystallography Of Soluble And Membrane Proteins written by Ingeborg Schmidt-Krey and has been published by Humana Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-11-07 with Science categories.


The basic principle of electron crystallography is to calculate a 3D density map by combining the amplitudes obtained from electron diffraction patterns with the experimental phases calculated from images of two-dimensional crystals of membrane or soluble proteins. This technology is very well developed and has produced a number of atomic models of membrane proteins in a lipid environment. Focused on comprehensive experimental protocols, Electron Crystallography of Soluble and Membrane Proteins: Methods and Protocols covers the entire range of techniques used in electron crystallography, including protein sample preparation, 2D crystallization, and screening in negative stain over electron cryo-microscopy (cryo-EM) and data processing, as well as modeling of conformational changes. Additional chapters provide perspective on past, present, and future challenges as well as complementary methods. Written for the popular Methods in Molecular BiologyTM series, the work contains the kind of detailed descriptions and implementation advice necessary to ensure successful results. Comprehensive and cutting-edge, Electron Crystallography of Soluble and Membrane Proteins: Methods and Protocols serves laboratories new to the methods as well as state-of-the-art facilities pursuing this exciting area of protein science.