A Peculiar Meridional Reflection in the X-ray Diffraction Pattern from Dipteran Flight Muscle Suggests an Alternating Arrangement of Tropomyosin Isoforms

A series of events occurred when wool was heated in vacuum. At some stages structural changes in the thermally-treated wool were observed, as reflected in the low-angle x-ray diffraction patterns. An increase in the intensity of the 39 Å meridional reflection and the appearance of a 4-point diagram with azimuthal angle of 45° at about 46 Å spacing were observed when wool was heated near 170°C for 90 min. Similar results were found in samples heated at higher temperatures but for shorter time. The most heat-resistant meridional reflection is the 66 Å. The low-angle x-ray diffraction patterns of plasma-treated wool showed only disappearance of the sharp lipid ring at 48 Å. No intensification of any reflection was observed. Prolonged treatment with plasma destroys the low-angle x-ray diffraction pattern of wool.

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X-ray diffraction pattern from the flight muscle of Toxorhynchites towadensis reveals the specific phylogenic position of mosquito among Diptera

Zoological Letters ◽

10.1186/s40851-015-0024-1 ◽

2015 ◽

Vol 1 (1) ◽

Cited By ~ 4

Author(s):

Hiroyuki Iwamoto

Keyword(s):

Diffraction Pattern ◽

Flight Muscle ◽

X Ray Diffraction ◽

X Ray

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Effects of ATP Analogs on the Low-Angle X-Ray Diffraction Pattern of Insect Flight Muscle

Cold Spring Harbor Symposia on Quantitative Biology ◽

10.1101/sqb.1973.037.01.055 ◽

1973 ◽

Vol 37 (0) ◽

pp. 443-447 ◽

Cited By ~ 38

Author(s):

J. Barrington Leigh ◽

K. C. Holmes ◽

H. G. Mannherz ◽

G. Rosenbaum ◽

F. Eckstein ◽

...

Keyword(s):

Diffraction Pattern ◽

Flight Muscle ◽

Insect Flight ◽

Insect Flight Muscle ◽

X Ray Diffraction ◽

X Ray ◽

Atp Analogs

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Effect of activation by calcium on the X-ray diffraction pattern from insect flight muscle

Journal of Molecular Biology ◽

10.1016/0022-2836(75)90090-x ◽

1975 ◽

Vol 92 (1) ◽

pp. 39-53 ◽

Cited By ~ 21

Author(s):

P.M. Armitage ◽

R.T. Tregear ◽

A. Miller

Keyword(s):

Diffraction Pattern ◽

Flight Muscle ◽

Insect Flight ◽

Insect Flight Muscle ◽

X Ray Diffraction ◽

X Ray

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Electron Microscopy of Shock Loaded Polycrystalline Beryllium

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100052547 ◽

1974 ◽

Vol 32 ◽

pp. 506-507 ◽

Cited By ~ 1

Author(s):

J. M. Galbraith ◽

L. E. Murr ◽

A. L. Stevens

Keyword(s):

Electron Microscopy ◽

Wave Propagation ◽

Structural Change ◽

Single Crystal ◽

Diffraction Pattern ◽

Shock Loading ◽

Slip Systems ◽

Compression Tests ◽

X Ray Diffraction ◽

X Ray

Uniaxial compression tests and hydrostatic tests at pressures up to 27 kbars have been performed to determine operating slip systems in single crystal and polycrystal1ine beryllium. A recent study has been made of wave propagation in single crystal beryllium by shock loading to selectively activate various slip systems, and this has been followed by a study of wave propagation and spallation in textured, polycrystal1ine beryllium. An alteration in the X-ray diffraction pattern has been noted after shock loading, but this alteration has not yet been correlated with any structural change occurring during shock loading of polycrystal1ine beryllium.This study is being conducted in an effort to characterize the effects of shock loading on textured, polycrystal1ine beryllium. Samples were fabricated from a billet of Kawecki-Berylco hot pressed HP-10 beryllium.

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Cytomembrane Preservation in Tissue Dehydrated Only With Glutaraldehyde and Epon 812 Resin

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100072046 ◽

1973 ◽

Vol 31 ◽

pp. 320-321

Author(s):

Daniel C. Pease

Keyword(s):

Diffraction Pattern ◽

X Ray Diffraction ◽

High Concentration ◽

Unpublished Study ◽

X Ray ◽

Sectioned Material

A previous study demonstrated that tissue could be successfully infiltrated with 50% glutaraldehyde, and then subsequently polymerized with urea to create an embedment which retained cytomembrane lipids in sectioned material. As a result, the 180-190 Å periodicity characteristic of fresh, mammalian myelin was preserved in sections, as was a brilliant birefringence, and the capacity to bind OsO4 vapor in the hydrophobic bilayers. An associated (unpublished) study, carried out in co-operation with Drs. C.K. Akers and D.F. Parsons, demonstrated that the high concentration of glutaraldehyde (and urea) did not significantly alter the X-ray diffraction pattern of aldehyde-fixed, myelin. Thus, by itself, 50% glutaraldehyde has little effect upon cytomembrane systems and can be used with confidence for the first stages of dehydration.

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Pearl Testing Through only One X-Ray Diffraction Pattern

The Journal of Gemmology ◽

10.15506/jog.1962.8.7.251 ◽

1962 ◽

Vol 8 (7) ◽

pp. 251-252

Author(s):

Jorge Angus

Keyword(s):

Diffraction Pattern ◽

X Ray Diffraction ◽

X Ray

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Efficient methods of X-ray diffraction pattern inversion

Results in Physics ◽

10.1016/j.rinp.2019.102605 ◽

2019 ◽

Vol 15 ◽

pp. 102605

Author(s):

Ian Gregory Shuttleworth

Keyword(s):

Diffraction Pattern ◽

X Ray Diffraction ◽

X Ray

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X-ray diffraction analysis of matter taking into account the second harmonic in the scattering of powerful ultrashort pulses of an electromagnetic field

Scientific Reports ◽

10.1038/s41598-021-83183-3 ◽

2021 ◽

Vol 11 (1) ◽

Author(s):

M. K. Eseev ◽

A. A. Goshev ◽

K. A. Makarova ◽

D. N. Makarov

Keyword(s):

Electromagnetic Field ◽

Diffraction Analysis ◽

Diffraction Pattern ◽

Second Harmonic ◽

Ultrashort Pulses ◽

X Ray Diffraction ◽

X Ray ◽

Scattering Spectra ◽

Technical Possibility ◽

2D And 3D

AbstractIt is well known that the scattering of ultrashort pulses (USPs) of an electromagnetic field in the X-ray frequency range can be used in diffraction analysis. When such USPs are scattered by various polyatomic objects, a diffraction pattern appears from which the structure of the object can be determined. Today, there is a technical possibility of creating powerful USP sources and the analysis of the scattering spectra of such pulses is a high-precision instrument for studying the structure of matter. As a rule, such scattering occurs at a frequency close to the carrier frequency of the incident USP. In this work, it is shown that for high-power USPs, where the magnetic component of USPs cannot be neglected, scattering at the second harmonic appears. The scattering of USPs by the second harmonic has a characteristic diffraction pattern which can be used to judge the structure of the scattering object; combining the scattering spectra at the first and second harmonics therefore greatly enhances the diffraction analysis of matter. Scattering spectra at the first and second harmonics are shown for various polyatomic objects: examples considered are 2D and 3D materials such as graphene, carbon nanotubes, and hybrid structures consisting of nanotubes. The theory developed in this work can be applied to various multivolume objects and is quite simple for X-ray structural analysis, because it is based on analytical expressions.

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The crystal structures and mechanical properties of the uranyl carbonate minerals roubaultite, fontanite, sharpite, widenmannite, grimselite and čejkaite

Inorganic Chemistry Frontiers ◽

10.1039/d0qi00933d ◽

2020 ◽

Vol 7 (21) ◽

pp. 4197-4221 ◽

Cited By ~ 1

Author(s):

Francisco Colmenero ◽

Jakub Plášil ◽

Jiří Sejkora

Keyword(s):

Mechanical Properties ◽

Hydrogen Bonding ◽

Diffraction Pattern ◽

Crystal Structures ◽

First Principles ◽

X Ray Diffraction ◽

Carbonate Minerals ◽

X Ray ◽

Uranyl Carbonate

The structure, hydrogen bonding, X-ray diffraction pattern and mechanical properties of six important uranyl carbonate minerals, roubaultite, fontanite, sharpite, widenmannite, grimselite and čejkaite, are determined using first principles methods.

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