The History of X-Ray Analysis

1965 ◽  
Vol 3 (7) ◽  
pp. 295-300
Author(s):  
Lawrence Bragg
Keyword(s):  
X Ray ◽  
History Of

Lingual Dystonia Treated with Botulinum Toxin - A Case Report

1970 ◽  
Vol 24 (2) ◽  
pp. 75-78
Author(s):  
MA Hayee ◽  
QD Mohammad ◽  
H Rahman ◽  
M Hakim ◽  
SM Kibria
Keyword(s):  
Botulinum Toxin ◽  
Botulinum Toxin A ◽  
Botulinum Toxin Type A ◽  
Botulinum Toxin Type ◽  
X Ray ◽  
Medical College ◽  
Lingual Dystonia ◽  
History Of ◽  
Chest X Ray

A 42-year-old female presented in Neurology Department of Sir Salimullah Medical College with gradually worsening difficulty in talking and eating for the last four months. Examination revealed dystonic tongue, macerated lips due to continuous drooling of saliva and aspirated lungs. She had no history of taking antiparkinsonian, neuroleptics or any other drugs causing dystonia. Chest X-ray revealed aspiration pneumonia corrected later by antibiotics. She was treated with botulinum toxin type-A. Twenty units of toxin was injected in six sites of the tongue. The dystonic tongue became normal by 24 hours. Subsequent 16 weeks follow up showed very good result and the patient now can talk and eat normally. (J Bangladesh Coll Phys Surg 2006; 24: 75-78)

Highlights in the history of X-ray topography1

1995 ◽  
Vol 210 (6) ◽  
Author(s):  
A. R. Lang
Keyword(s):  
Magnetic Domain ◽  
Diffraction Theory ◽  
Dislocation Loops ◽  
X Ray Diffraction ◽  
X Ray ◽  
Domain Structures ◽  
Structure Factors ◽  
History Of ◽  
Dislocation Sources ◽  
Non Destructive

AbstractX-ray topography provides a non-destructive method of mapping point-by-point variations in orientation and reflecting power within crystals. The discovery, made by several workers independently, that in nearly perfect crystals it was possible to detect individual dislocations by X-ray diffraction contrast started an epoch of rapid exploitation of X-ray topography as a new, general method for assessing crystal perfection. Another discovery, that of X-ray Pendellösung, led to important theoretical developments in X-ray diffraction theory and to a new and precise method for measuring structure factors on an absolute scale. Other highlights picked out for mention are studies of Frank-Read dislocation sources, the discovery of long dislocation helices and lines of coaxial dislocation loops in aluminium, of internal magnetic domain structures in Fe-3 wt.% Si, and of stacking faults in silicon and natural diamonds.

scholarly journals Foreign Body in abdomen

2015 ◽  
Vol 14 (2) ◽  
pp. 210-212
Author(s):  
Md Zakirul Alam ◽  
Mohibul Aziz
Keyword(s):  
Abdominal Pain ◽  
Foreign Body ◽  
Medical Science ◽  
X Ray ◽  
Diagnostic Center ◽  
History Of ◽  
Upper Abdominal ◽  
Married Female

A 19 years old married female presented with severe upper abdominal pain, repeated vomiting having history of swallowing a knife 7 months ago was admitted in Mordern Clinic and Diagnostic center, Joypurhat, Bangladesh. USG abdomen & X-ray (fig-1) abdomen were done when presence of a large foreign body (knife fig-3) in abdomen was made which latter on confirmed by Endoscopy of upper GIT (fig-2). Surprisingly the patient kept it in her abdomen for 7 months without any symptoms until the symptoms got worse and compelled her to seek medical help. The knife was removed by laparotomy, gastrotomy with uneventful recovery.Bangladesh Journal of Medical Science Vol.14(2) 2015 p.210-212

Plastic deformations in kyanites by tectonometamorphic processes: a single-crystal X-ray diffraction study

2009 ◽  
Vol 73 (3) ◽  
pp. 359-371 ◽  
Author(s):  
G. D. Gatta ◽  
N. Rotiroti ◽  
M. Zucali
Keyword(s):  
Single Crystal ◽  
X Ray Diffraction ◽  
Plastic Deformations ◽  
X Ray ◽  
Deformational History ◽  
Significant Difference ◽  
Elliptical Section ◽  
History Of ◽  
Diffraction Patterns ◽  
Two Stages

AbstractThe crystalch emistry and crystal structure of naturalky anite crystals from the Eclogitic Micaschists Complex of the Sesia-Lanzo Zone, Western Italian Alps, have been investigated by means of optical microscopy, wavelength dispersive X-ray microanalysis, and single-crystal X-ray diffraction. The association of kyanite + garnet + phengitic-mica + chloritoid suggests that the eclogite-facies stages occurred at P ≤ 2.1 GPa and T ≤ 650ºC. Kyanite grains are large (cm-sized) porphyroblasts grown dynamically during one of the deformational events related to the subduction of the Austroalpine continentalcr ust. Under the polarizing microscope, kyanite grains show almost homogeneous cores, whereas rims are sometimes symplectitic aggregates of quartz and kyanite, confirming at least two stages of growth most likely related to the multistage deformational history of these rocks. Chemical analysis shows that Fe3+ is the major substituting cation for Al3+, ranging between 0.038 and 0.067 a.p.f.u.The single-crystal X-ray diffraction investigation of the kyanites shows severely textured patterns on the (h0l)*-plane. Such evidence is not observed in the unwarped diffraction patterns on (0kl)* and (hk0)*. The most significant difference between the structuralp arameters refined in this study, with respect to those of previously published unstrained gem-quality crystals, concerns the displacement parameters. The anisotropic displacement ellipsoids of all the atomic sites are significantly larger than those previously described, and systematically oriented with the largest elliptical section almost perpendicular to [010]. The larger ellipsoids in the kyanite crystal investigated here reflect the displacement of the centre of gravity of the electron distribution, rather than an anomalous atomic thermal motion. The magnitude and orientation of the displacement parameters and the textured/strained diffraction pattern may be the result of two combined effects: (1) that the kyanite crystals are actually composed of several blocks; (2) the crystals are affected by a pervasive residual strain, as a result of tectonometamorphic plastic deformations and re-crystallization.

SEM-based mineralogical mapping at the submicrometer-scale of modern Sardinian stromatolites

2021 ◽  
Author(s):  
Juliette Debrie ◽  
Dimitri Prêt ◽  
Karim Benzerara ◽  
Jean Paul Saint Martin
Keyword(s):  
Mineralogical Composition ◽  
Treatment Method ◽  
Heterogeneous Distribution ◽  
X Ray ◽  
Mineral Phases ◽  
Saint Martin ◽  
History Of ◽  
Phase Recognition ◽  
Mineral Mixtures ◽  
Insight Into

<p>Stromatolites, i.e. macroscopically laminated carbonate rocks formed by diverse microbial communities, are particularly emblematic geobiological materials since they are the oldest evidence of life-mineral interactions, dated up to 3.5 Gyrs ago.  They are found throughout the history of the Earth and have received strong attention because they provide precious information about microbial paleobiodiversity and paleoenvironments. However, while this information is interpreted based on our knowledge about modern analogs, the latter remains very incomplete. Here, we studied recently discovered modern stromatolites from Mari Ermi<sup>1</sup>, a coastal pond in Western Sardinia, that seasonally experience severe evaporation and broad salinity variations. For this purpose, we explored the mineralogical composition of these unique sedimentary archives and its spatial variations in order to gain better insight into how mineral phases record the conditions and processes of their formation. We investigated the heterogeneous distribution of minerals using quantitative X-ray chemical maps provided by energy dispersive x-ray spectrometry analyses coupled with scanning electron microscopy (SEM-EDXS). Hyperspectral maps were analyzed using an innovative data treatment method <sup>2</sup> allowing phase recognition within the complex mineral mixtures and solid solutions encountered. This method provided quantitative data on spatial distribution, modal content and associated calculated unit formulas for each identified mineral and phase with a hundred nanometer resolution. Based on these results, we will discuss the origin of the laminations in the stromatolites.</p><p>Reference:</p><p>1. Saint Martin, J.-P. & Saint Martin, S. Geo-Eco-Marina <strong>21</strong>, 35–53 (2015a).</p><p>2. Prêt, D. et al. American Mineralogist <strong>95</strong>, 1379–1388 (2010).</p>

COMMITTEE ON ACCIDENT PREVENTION

PEDIATRICS ◽  
1953 ◽  
Vol 12 (2) ◽  
pp. 198-198
Author(s):  
◽  
Keyword(s):  
Accident Prevention ◽  
X Ray ◽  
History Of

The Committee on Accident Prevention has submitted the following statement: Precautions in the Use of Fluoroscopy General No unnecessary examination should be made. A history of any previous x-ray exposures—by fluoroscopy or roentgenography—should be obtained. Carry out at no more than 3, but preferably 2 milliamperes. Record the durations of each examination and the site examined on the child's history. Equipment Filters 2-3 mm. aluminum are to be used. The longest possible target—table top distance—preferably 18" should be used. Calibration of output (r) of machine should be made not less than once a year unless the tube has been changed or other repairs made. Machines should have a timing switch which cuts off automatically after 5 minutes. The machine and controls should be of shockproof type. Method Accommodate before fluoroscopy (use red glasses—10 minutes before entering fluoroscopy room). Wear protective apron and gloves. Use the minimal field compatible with the requirements of the examination. Never increase milliampere settings to "see better."

scholarly journals Urinothorax Caused by Xanthogranulomatous Pyelonephritis

2018 ◽  
Vol 2018 ◽  
pp. 1-3
Author(s):  
Waiel Abusnina ◽  
Hazim Bukamur ◽  
Zeynep Koc ◽  
Fauzi Najar ◽  
Nancy Munn ◽  
...  
Keyword(s):  
Urinary Tract ◽  
Obstructive Uropathy ◽  
Xanthogranulomatous Pyelonephritis ◽  
Robot Assisted ◽  
Rare Form ◽  
X Ray ◽  
History Of ◽  
Chest X Ray ◽  
Tract Infections

Xanthogranulomatous pyelonephritis is a rare form of chronic pyelonephritis that generally afflicts middle-aged women with a history of recurrent urinary tract infections. Its pathogenesis generally involves calculus obstructive uropathy and its histopathology is characterized by replacement of the renal parenchyma with lipid filled macrophages. This often manifests as an enlarged, nonfunctioning kidney that may be complicated by abscess or fistula. This case details the first reported case of xanthogranulomatous pyelonephritis complicated by urinothorax, which resolved on follow-up chest X-ray after robot-assisted nephrectomy.

scholarly journals A Personal History of Using Crystals and Crystallography to Understand Biology and Advanced Drug Discovery

Crystals ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 676
Author(s):  
Tom L. Blundell
Keyword(s):  
Growth Factors ◽  
Drug Discovery ◽  
Cell Surface ◽  
Small Molecule ◽  
Personal History ◽  
X Ray ◽  
Surface Receptors ◽  
The Past ◽  
Industry Collaboration ◽  
History Of

Over the past 60 years, the use of crystals to define structures of complexes using X-ray analysis has contributed to the discovery of new medicines in a very significant way. This has been in understanding not only small-molecule inhibitors of proteins, such as enzymes, but also protein or peptide hormones or growth factors that bind to cell surface receptors. Experimental structures from crystallography have also been exploited in software to allow prediction of structures of important targets based on knowledge of homologues. Crystals and crystallography continue to contribute to drug design and provide a successful example of academia–industry collaboration.

X-Ray and Magnetic Measurements of TmFeTi2O7

2014 ◽  
Vol 215 ◽  
pp. 470-473 ◽  
Author(s):  
Tamara V. Drokina ◽  
German A. Petrakovskii ◽  
Dmitrii A. Velikanov ◽  
Maksim S. Molokeev
Keyword(s):  
Spin Glass ◽  
Solid Phase ◽  
Magnetic Measurements ◽  
Diffraction Method ◽  
Freezing Temperature ◽  
Solid Phase Reaction ◽  
Phase Reaction ◽  
X Ray Diffraction ◽  
X Ray ◽  
History Of

In this paper we are reported about a peculiarity of the crystal structure and the magnetic state of TmFeTi2O7. The compound TmFeTi2O7 has been synthesizedusing the solid-phase reaction method. Using X-ray diffraction method the disorder in the distribution of the iron ions over five nonequivalent crystal sites was observed, also the populations of the iron atoms positions were determined. We show that below Tf = 6 K the magnetization of TmFeTi2O7 depends on the magnetic history of the sample. There are indications for spin glass state. This results allow us to assume the state of spin glass is realized below freezing temperature Tf = 6 K in TmFeTi2O7.

scholarly journals Bone Mineral Density in Gravida: Effect of Pregnancies and Breast-Feeding in Women of Differing Ages and Parity

2014 ◽  
Vol 2014 ◽  
pp. 1-7 ◽  
Author(s):  
Ehud Lebel ◽  
Yuri Mishukov ◽  
Liana Babchenko ◽  
Arnon Samueloff ◽  
Ari Zimran ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Bone Mineral ◽  
Institutional Review Board ◽  
Mineral Density ◽  
X Ray ◽  
Normal Limits ◽  
Institutional Review Board Approval ◽  
Institutional Review ◽  
History Of ◽  
Breast Fed

Changes of bone during pregnancy and during lactation evaluated by bone mineral density (BMD) may have implications for risk of osteoporosis and fractures. We studied BMD in women of differing ages, parity, and lactation histories immediately postpartum for BMD,T-scores, andZ-scores. Institutional Review Board approval was received. All women while still in hospital postpartum were asked to participate. BMD was performed by dual-energy X-ray absorptiometry (DXA) machine at femoral neck (FN) and lumbar spine (LS) by a single technician. Of 132 participants, 73 (55.3%) were ≤30 years; 27 (20.5%) were primiparous; 36 (27.3%) were grand multiparous; 35 (26.5%) never breast fed. Mean FNT-scores andZ-scores were higher than respective mean LS scores, but all means were within the normal limits. Mean LST-scores andZ-scores were highest in the grand multiparas. There were only 2 (1.5%) outliers with lowZ-scores. We conclude that, in a large cohort of Israeli women with BMD parameters assessed by DXA within two days postpartum, meanT-scores andZ-scores at both the LS and FN were within normal limits regardless of age (20–46 years), parity (1–13 viable births), and history of either no or prolonged months of lactation (up to 11.25 years).

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