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Friday, July 17, 2020 | History

5 edition of Direct Phasing in Crystallography found in the catalog.

Direct Phasing in Crystallography

Fundamentals and Applications (International Union of Crystallography Monographs on Crystallography)

by Carmelo Giacovazzo

  • 190 Want to read
  • 12 Currently reading

Published by Oxford University Press, USA .
Written in English


The Physical Object
Number of Pages792
ID Numbers
Open LibraryOL7399906M
ISBN 100198500726
ISBN 109780198500728

Direct methods (crystallography) In crystallography, direct methods are a family of methods for estimating the phases of the Fourier transform of the scattering density from the corresponding magnitudes. The methods generally exploit constraints or statistical correlations between the phases of different Fourier components that result from the fact that the scattering density must be a positive real number.   The proteome remains a mysterious realm. Researchers have determined the structures of only a small fraction of the proteins encoded by the human genome. Crystallography continues to be the primary method used to determine the structures of the remaining unknown proteins. This imaging technique uses the diffraction of X-rays to determine a protein's three-dimensional molecular structure.

The Phase Problem in X-ray Crystallography. Patterson Methods. Direct Methods. Multiple Isomorphous Replacement. Multiwavelength Anomalous Dispersion (MAD). Molecular Replacement. Phase Improvement. Summary Scattered waves are out of phase Scattered waves are in phase Diffracted beam is weak Diffracted beam is strong (a) (b) 1 2 3 4.   Electron crystallography of MWW zeolites – filling the missing cone. Zeitschrift für Kristallographie , (3) DOI: /zkri Douglas L. Dorset, Christopher J. Gilmore. Ab Initio Electron Diffraction Structure Analysis of Zeolites – Direct Methods Determination of NaY.

  Direct phasing in protein electron crystallography--phase extension and the prospects for ab initio determinations. Dorset DL(1). Author information: (1)Electron Diffraction Department, Hauptman-Woodward Medical Research Institute, Inc., Buffalo, NY , USA. [email protected] Modern structural applications of crystallography make extensive use of statistical methods, in particular the probability density function (pdf) of the magnitude of the structure factor. Similarly, direct methods of phase determination have been responsible for much of the success of crystallography - methods based on properties of joint pdfs.


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Direct Phasing in Crystallography by Carmelo Giacovazzo Download PDF EPUB FB2

Direct phasing was the subject of the Nobel Prize in Chemistry and is the workhorse of modern structural investigations. This book is the best comprehensive work on the subject. Giacovazzo begins with first principles and presents the various methods and applications of direct phasing in a systematic, rigorous, and thorough mannerCited by:   Direct methods are the most widely used techniques for solving the crystal structures of small molecules and are finding important applications in macromolecular crystallography.

This book offers both a comprehensive description of the field and an invaluable reference tool and so will appeal to a wide variety of scientists. Direct Phasing in Crystallography by Carmelo Giacovazzo,available at Book Depository with free delivery : Carmelo Giacovazzo.

Direct Methods are the widely used techniques for solving the crystal structures of small molecules, with applications in macromolecular crystallography. This book offers a description of the field and a reference tool for scientists from undergraduate physics, chemistry, biochemistry, mineralogy students, and the professional crystallographer.

Phasing in Crystallography Carmelo Giacovazzo The book describes phasing techniques in modern crystallography. The main text is dedicated to their simple description, and further mathematical details are contained in the appendices.

Practical aspects are described for each specific method, ma. Modern crystallographic methods originate from the synergy of two main research streams, the small-molecule and the macro-molecular streams. The first stream was able to definitively solve the phase problem for molecules up to atoms in the asymmetric unit.

The achievements obtained by the macromolecular stream are also impressive. A huge number of protein structures. Direct Phasing in Crystallography book book describes phasing techniques in modern crystallography.

The main text is dedicated to their simple description, and further mathematical details are contained in the appendices. Practical aspects are described for each specific method, making it a useful tool for the daily work of practising crystallographers.

Direct Phasing in Crystallography Fundamentals and Applications CARMELO GIACOVAZZO Professor of Crystallography, University of Bari, Italy INTERNATIONAL UNION OF CRYSTALLOGRAPHY OXFORD UNIVERSITY PRESS Contents Abbreviations xxiv 1.

Wilson statistics 1 Introduction 1. Direct phasing from powder data-- Macromolecular crystallography techniques and traditional direct methods-- A Crick and Magdoff relation-- B Protein phase estimate incorporating the treatment of errors-- C Solvent flattening-- D About Fourier synthesis of large use in macromolecular crystallography-- E Solvent content.

Phasing. There are many excellent comprehensive texts on macromolecular crystallography that include sections on phasing methods (Blundell & Johnson, ; Drenth,; Blow, ; Lattman & Loll, ; Rhodes, ; McPherson, ; Rossmann & Arnold, ; Rupp, ).This introduction to the CCP4 Study Weekend on Experimental Phasing attempts to.

Carmelo Giacovazzo's newly pub­lished book, Phasing in Crystallography: A Modern Perspective, is a capstone on his impressive bibliography of publications: his textbook Fundamentals of Crystallography, authored along with a team of special-topics co-authors; his comprehensive monograph Direct Phasing in Crystallography: Fundamentals and Applications.

Direct methods of crystal structure determination are usually associated with techniques in which phases for a set of structure factors are determined from the corresponding experimental amplitudes by probabilistic calcula­ tions.

It is thus implied that such ab initio phase calculations do not. Abstract. Although other, more traditional, methods for determination of crystallographic phases have been often used with electron diffraction intensity data from organic crystals, direct phasing based on the probabilistic estimate of structure invariants has been found recently to be generally applicable for such structure analyses.

The book describes phasing techniques in modern crystallography. The main text is dedicated to their simple description, and further mathematical details are contained in the appendices. Practical aspects are described for each specific method, making it a useful tool for the daily work of practising crystallographers.

Release Direct (ab initio) Methods If the crystal diffracts to high resolution (), the initial phases can be estimated using direct methods. Direct methods can be used in x-ray crystallography, neutron crystallography, and electron crystallography.

A number of initial. material and the general guidelines given in my textbook Direct Phasing in Crystallography, originally published in This was essentially a descrip-tion of the mathematical bases of direct methods and of their historical evolution,withsomereferencestoapplicativeaspectsandancillarytechniques.

Phasing in crystallography has its origins in Carmelo Giacovazzo’s monograph Direct phasing in crystallography, but with a broader coverage of the range of modern phasing methods. Direct phasing in crystallography. By Carmelo Giacovazzo.

IUCr Monographs on Crystallography No. Oxford: IUCr/Oxford Science Publications, Pp. xxiii + Price US $ ISBN 0‐19‐‐6. Direct phasing in crystallography. By Carmelo Giacovazzo. X-ray Crystallography Lectures 1. Biological imaging by X-ray diffraction. An overview. Crystals. Growth, physical properties and diffraction.

Working in reciprocal space. X-ray intensity data collection and analysis. Crystallographic phasing. Molecular replacement, isomorphous replacement, multiwavelength methods. Crystals won’t. 8 Direct phasing in crystallography C. Giacovazzo 9 The weak hydrogen bond G.R.

Desiraju, T. Steiner 10 Defect and microstructure analysis by diffraction R.L. Snyder, J. Fiala and H.J. Bunge 11 Dynamical theory of X-ray diffraction A. Authier 12 The chemical bond in inorganic chemistry I.D. Brown 13 Structure determination from powder.

IUCr/OUP Book Series. The IUCr/Oxford University Press (OUP) Book Series, consisting of three sub-series, was launched in Proposals for new books to be included in this Series must be submitted to the IUCr/OUP Book Series Selection Committee considers proposals for new publications and makes recommendations to the IUCr Executive Committee and to the Delegates of .Research was funded by a grant from the National Science Foundation (CHE).

The first part of the title is borrowed from a subsection of a chapter on direct phasing by M. F. C. Ladd and R. A. Palmer in their book, Theory and Practice of Direct Methods in Crystallography .The most important phase relationships and their application in solving the phase problem H.

Schenk Laboratory for Crystallography, University of Amsterdam, Nieuwe AchtergrachtWN, Amsterdam Teaching aims. To help students, with some basic knowledge of crystallography, to understand the principle of direct methods.

Level.