Results 331 to 340 of about 7,768,769 (373)
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Review of Scientific Instruments, 1979
A method for the magnification of x-ray radiographic images is described and demonstrated. This magnifier employs two successive asymmetric diffractions of an x-ray beam from highly perfect silicon crystals. The two diffractions magnify the beam in two perpendicular directions.
W J, Boettinger +2 more
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A method for the magnification of x-ray radiographic images is described and demonstrated. This magnifier employs two successive asymmetric diffractions of an x-ray beam from highly perfect silicon crystals. The two diffractions magnify the beam in two perpendicular directions.
W J, Boettinger +2 more
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Pediatrics, 1981
Mata and Rosengart1 believe that interobserver variability in interpreting radiographs may play a part in the disparate incidence of necrotizing enterocolitis (NEC) reported from various centers. Underlying their contention is the implication that the diagnosis of NEC rests upon abnormal radiographic findings.
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Mata and Rosengart1 believe that interobserver variability in interpreting radiographs may play a part in the disparate incidence of necrotizing enterocolitis (NEC) reported from various centers. Underlying their contention is the implication that the diagnosis of NEC rests upon abnormal radiographic findings.
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1991
Two groups of X-ray methods are now widely applied to the study of environmental samples for geochemistry and pollution investigations, X-ray emission spectrometry (XRS) and X-ray diffraction (XRD), and the underlying physical principles of these methods and their limitations are well understood.
Markowicz, A., Van Grieken, René
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Two groups of X-ray methods are now widely applied to the study of environmental samples for geochemistry and pollution investigations, X-ray emission spectrometry (XRS) and X-ray diffraction (XRD), and the underlying physical principles of these methods and their limitations are well understood.
Markowicz, A., Van Grieken, René
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1992
This chapter covers the preliminary characterization of the crystals in order to determine if they are suitable for a full structure determination. Probably more frustrating than failure to produce crystals at all, is the growth of beautiful crystals which do not diffract, which have very large unit cell dimensions, or which decay very rapidly in the X-
L Sawyer, M A Turner
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This chapter covers the preliminary characterization of the crystals in order to determine if they are suitable for a full structure determination. Probably more frustrating than failure to produce crystals at all, is the growth of beautiful crystals which do not diffract, which have very large unit cell dimensions, or which decay very rapidly in the X-
L Sawyer, M A Turner
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1982
X-rays are produced whenever electrons are suddenly brought to rest by colliding with matter. It is necessary therefore, for the following conditions to prevail: 1. a means of producing and sustaining a stream of electrons, i.e. a good vacuum, with a source of electrons which in most modern X-ray tubes is a heated filament; 2.
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X-rays are produced whenever electrons are suddenly brought to rest by colliding with matter. It is necessary therefore, for the following conditions to prevail: 1. a means of producing and sustaining a stream of electrons, i.e. a good vacuum, with a source of electrons which in most modern X-ray tubes is a heated filament; 2.
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Surface Studies of Solids by Total Reflection of X-Rays
, 1954L. G. Parratt
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X-Rays and Extreme Ultraviolet Radiation: Principles and Applications
, 2017D. Attwood
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