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Author: William L. Duax
Publisher: Springer Science & Business Media
ISBN: 1475704267
Category : Science
Languages : en
Pages : 753
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Book Description
model. In general, the mean atomic positions and the geometrical parameters calculated from them are more accurate if the more sophisticated anisotropic model has been used for the thermal motion during structure refinement. Low temperature data collection also results in more accurately determined structures. By decreasing the temperature at which data is collected, the intensities and number of data observed is increased. Since hydrogen atoms have only a single electron, they scatter X-rays very weakly, and they can be observed experimentally only if the data are of good quality. Finally, in the absence of systematic errors in data collection or refinement, tae greater the number of observed data relative to the number of independent atoms, the better the atomic resolution will be. Table 1 is a summary of the information used in assessing the reliability of a structure. Neutron diffraction is the result of interaction of atomic nuclei with a neutron beam. The intensi ty of the diffracted beam is not proportional to atomic number. Hydrogen, deuterium, carbon, oxygen and nitrogen scatter neutrons with almost equal intensity. In addition, hydrogen and deuterium scatter out of phase so that they can be distinguished wita high precision. 20-Methyl-5-pregnene-3S,20-diol (PR104N) is the only steroid which has been the subject of a neutron diffraction study. The study was undertaken to examine the stereospecificity of Grignard addition using deuterated reagent. Data were collected at 123°K.
Author: William L. Duax
Publisher: Springer Science & Business Media
ISBN: 1475704267
Category : Science
Languages : en
Pages : 753
Get Book Here
Book Description
model. In general, the mean atomic positions and the geometrical parameters calculated from them are more accurate if the more sophisticated anisotropic model has been used for the thermal motion during structure refinement. Low temperature data collection also results in more accurately determined structures. By decreasing the temperature at which data is collected, the intensities and number of data observed is increased. Since hydrogen atoms have only a single electron, they scatter X-rays very weakly, and they can be observed experimentally only if the data are of good quality. Finally, in the absence of systematic errors in data collection or refinement, tae greater the number of observed data relative to the number of independent atoms, the better the atomic resolution will be. Table 1 is a summary of the information used in assessing the reliability of a structure. Neutron diffraction is the result of interaction of atomic nuclei with a neutron beam. The intensi ty of the diffracted beam is not proportional to atomic number. Hydrogen, deuterium, carbon, oxygen and nitrogen scatter neutrons with almost equal intensity. In addition, hydrogen and deuterium scatter out of phase so that they can be distinguished wita high precision. 20-Methyl-5-pregnene-3S,20-diol (PR104N) is the only steroid which has been the subject of a neutron diffraction study. The study was undertaken to examine the stereospecificity of Grignard addition using deuterated reagent. Data were collected at 123°K.
Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1608
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Book Description
Author: Elsevier
Publisher: Elsevier Health Sciences
ISBN: 0323810845
Category : Medical
Languages : en
Pages : 1747
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Book Description
Selecting diagnosis codes is faster and easier with Buck's 2022 ICD-10-CM for Hospitals. Designed by coders for coders, this full-color manual includes all the ICD-10 codes that you need for today’s inpatient coding. As coders need extensive knowledge to code with ICD-10-CM — and to choose from the thousands of possible codes — this edition makes it easier with colorful anatomy plates (including Netter’s Anatomy illustrations) to help you understand anatomy and how it can affect your code choices. In addition, it comes with durable spiral binding, and includes a companion website with the latest coding updates.
Author: Carol J. Buck
Publisher: Elsevier Health Sciences
ISBN: 0323567835
Category : Medical
Languages : en
Pages : 1712
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Book Description
Ideal for radiology residents and medical students, as well as anyone who reads or orders radiology imaging studies, this user-friendly reference covers the basics of how to approach, read, and interpret radiological images. Using concise, step-by-step explanations and an enjoyable writing style, expert radiologist Dr. Fred A Mettler, Jr., walks you through a sequential thought process for all common indications for radiologic studies and their interpretation. Featuring thorough updates from cover to cover, this resource covers the fundamental information you need to know, as well as recent advances in the field.
Author: Mikhail E. Elyashberg
Publisher: Springer
ISBN: 3662464020
Category : Science
Languages : en
Pages : 458
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Book Description
Here, the authors introduce readers to solving molecular structure elucidation problems using the expert system ACD/Structure Elucidator. They explain in detail the concepts of the Computer-Assisted Structure Elucidation (CASE) approach and point out the crucial role of understanding the axiomatic nature of the data used to deduce the structure. Aspects covered include the main blocks of the expert system and essential features of the mathematical algorithms used. Graduate and PhD students as well as practicing chemists are provided with a detailed explanation of the various practical approaches depending on available spectral data peculiarities and the complexity of the unknown structure. This is supported by a large number of real-world completed examples, most of which are related to the structure elucidation of natural product molecules containing unusual skeletons. Dedicated software and further supplementary material are available at www.acdlabs.com/TeachingSE.
Author: Food and Agriculture Organization of the United Nations
Publisher: Food & Agriculture Org.
ISBN: 9251079986
Category : Political Science
Languages : en
Pages : 409
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Book Description
This publication presents the latest research in perennial crop breeding and programmes, and provides direction on where the field of perennial crop is heading. Many production systems and agricultural practices are no longer sustainable today as their effects on soils, water, biodiversity, and livelihood are significant. Mainstreaming the use of perennial crops into current practices can contribute to stabilize fragile soils and maintain natural processes essential to obtain stable and high yields. To face the challenges and risks of the twenty-first century, increasing the perenniality of crops and agricultural systems should become a larger research, development and policy focus.
Author: National Library of Medicine (U.S.). Medical Subject Headings Section
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 470
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Book Description
Author: National Library of Medicine (U.S.)
Publisher:
ISBN:
Category : Index medicus
Languages : en
Pages : 1208
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Book Description
Author: Michael Liwschitz-Garik
Publisher:
ISBN:
Category : Armatures
Languages : en
Pages : 808
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Book Description
Author: University of Chicago
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
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Book Description
