x-ray unit - tradução para árabe
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  3. x-ray unit

x-ray unit - tradução para árabe

X-ray Unit Committee
  • Using early [[Crookes tube]] X-Ray apparatus in 1896. One man is viewing his hand with a [[fluoroscope]] to optimise tube emissions, the other has his head close to the tube. No precautions are being taken.
  • External dose quantities used in radiation protection and dosimetry based on ICRU 57, jointly developed with the ICRP
  • [[Monument to the X-ray and Radium Martyrs of All Nations]] erected 1936 at St. Georg hospital in Hamburg, commemorating 359 early radiology workers.

x-ray unit      
وَحْدَةُ الأََشِعَّةِ السِّيْنِيَّة
x ray crystallography         
  • Model of the arrangement of water molecules in ice, revealing the [[hydrogen bond]]s (1) that hold the solid together.
  • The incoming beam (coming from upper left) causes each scatterer to re-radiate a small portion of its intensity as a spherical wave. If scatterers are arranged symmetrically with a separation ''d'', these spherical waves will be in sync (add constructively) only in directions where their path-length difference 2''d'' sin θ equals an integer multiple of the [[wavelength]] λ. In that case, part of the incoming beam is deflected by an angle 2θ, producing a ''reflection'' spot in the [[diffraction pattern]].
  • Three methods of preparing crystals, A: Hanging drop. B: Sitting drop. C: Microdialysis
  • tetrahedrally]] and held together by single [[covalent bond]]s, making it strong in all directions. By contrast, graphite is composed of stacked sheets. Within the sheet, the bonding is covalent and has hexagonal symmetry, but there are no covalent bonds between the sheets, making graphite easy to cleave into flakes.
  • access-date=2018-11-28}}</ref> The electron density is obtained from experimental data, and the ligand is modeled into this electron density.
  • Structure of a protein alpha helix, with stick-figures for the covalent bonding within electron density for the crystal structure at ultra-high-resolution (0.91&nbsp;Å). The density contours are in gray, the helix backbone in white, sidechains in cyan, O atoms in red, N atoms in blue, and hydrogen bonds as green dotted lines.<ref>From PDB file 2NRL, residues 17–32.</ref>
  • Animation showing the five motions possible with a four-circle kappa goniometer. The rotations about each of the four angles φ, κ, ω and 2θ leave the crystal within the X-ray beam, but change the crystal orientation. The detector (red box) can be slid closer or further away from the crystal, allowing higher resolution data to be taken (if closer) or better discernment of the Bragg peaks (if further away).
  • backbone]] from its N-terminus to its C-terminus.
  • Rocknest]]", October 17, 2012).<ref name="NASA-20121030" />
  • A protein crystal seen under a [[microscope]]. Crystals used in X-ray crystallography may be smaller than a millimeter across.
  • An X-ray diffraction pattern of a crystallized enzyme. The pattern of spots (''reflections'') and the relative strength of each spot (''intensities'') can be used to determine the structure of the enzyme.
  • Workflow for solving the structure of a molecule by X-ray crystallography.
TECHNIQUE USED FOR DETERMINING THE ATOMIC OR MOLECULAR STRUCTURE OF A CRYSTAL, IN WHICH THE ORDERED ATOMS CAUSE A BEAM OF INCIDENT X-RAYS TO DIFFRACT INTO SPECIFIC DIRECTIONS
X-ray structure; X-Ray Crystallography; X-Ray Diffraction Pattern; X ray diffraction; X-ray diffraction analysis; Crystallography, x-ray; Protein Crystallography; Protein crystallography; Xray crystallography; Xray Crystallography; X-ray Crystallography; X-ray crystalography; Crystallographic resolution; Laue diffraction; X-ray diffraction; History of X-ray crystallography; X ray crystallography; X-ray single-crystal analysis; X-ray crystal structure; Single-crystal X-ray crystallography; X-ray crystallographer; Laue method; X-ray diffraction crystallography; Single-crystal X-ray diffraction; X-ray structural analysis
‎ مَبْحَثُ تَصْويرِ البِلَّوراتِ بالأَشِعَّةِ السِّينِيَّة‎
x-ray diffraction         
  • Spectrum of various inelastic scattering processes that can be probed with inelastic X-ray scattering (IXS).
FAMILY OF NON-DESTRUCTIVE ANALYTICAL TECHNIQUES
X-ray scattering; X-Ray Diffraction; Resonant anomalous X-ray scattering; X-ray diffuse scattering; X-Ray diffraction; X-ray Diffraction; Inelastic X-ray scattering
انْعِراجُ الأشِعَّةِ السينِيَّة

Definição

X-ray crystallography
¦ noun the study of crystals and their structure by means of the diffraction of X-rays by the regularly spaced atoms of crystalline materials.
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Wikipédia

International Commission on Radiation Units and Measurements

The International Commission on Radiation Units and Measurements (ICRU) is a standardization body set up in 1925 by the International Congress of Radiology, originally as the X-Ray Unit Committee until 1950. Its objective "is to develop concepts, definitions and recommendations for the use of quantities and their units for ionizing radiation and its interaction with matter, in particular with respect to the biological effects induced by radiation".

The ICRU is a sister organisation to the International Commission on Radiological Protection (ICRP). In general terms the ICRU defines the units, and the ICRP recommends how they are used for radiation protection.

https://en.wikipedia.org/wiki/International Commission on Radiation Units and Measurements
Exemplos do corpo de texto para x-ray unit
1. An instrument for an operating theater, a Roentgen (X–ray) unit, Roentgen photography film and physiotherapy equipment were also among the items.
2. The programme will show footage of a doctor being attacked by a 55–year–old woman, a gang fight in an X–ray unit and a man biting another patient before trying to assault members of staff.
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