Relationship of catalase and sodium nitrite to protection against X-rays

1956 ◽  
Vol 10 (3) ◽  
pp. 665-674 ◽  
Author(s):  
C.S. Bachofer
Keyword(s):  
Sodium Nitrite ◽  
X Rays ◽  
Relationship Of

scholarly journals Difficulties with Positioning Robertshaw Double Lumen Tubes

1975 ◽  
Vol 3 (4) ◽  
pp. 299-311 ◽  
Author(s):  
A. M. S. Black ◽  
G. A. Harrison
Keyword(s):  
Tracheobronchial Tree ◽  
Precise Definition ◽  
X Rays ◽  
Double Lumen ◽  
Definition Of ◽  
Relationship Of ◽  
The Relationship

Difficulties in positioning Robertshaw tubes have been reviewed in a retrospective and a prospective series. Pre-operative chest X-rays did not help in predicting difficulties. The performance of the Robertshaw tube was carefully recorded for each malposition in the prospective series, and the relationship of the malplaced tube to the tracheobronchial tree was reconstructed. This exercise allowed a more precise definition of the dangers of malpositions and formulation of procedure to minimize their incidence.

Dose-response relationship of γ-H2AX foci induction in human lymphocytes after X-rays exposure

2011 ◽  
Vol 46 (9) ◽  
pp. 997-999 ◽  
Author(s):  
Tania Mandina ◽  
Sandrine H. Roch-Lefèvre ◽  
Pascale Voisin ◽  
Jorge E. González ◽  
Ana I. Lamadrid ◽  
...  
Keyword(s):  
Dose Response ◽  
Human Lymphocytes ◽  
X Rays ◽  
Response Relationship ◽  
Dose Response Relationship ◽  
Relationship Of

THE MAXIMUM ENERGY OF ħω INDUCED BY N+, N2+ AND N3+ IONS

1996 ◽  
Vol 06 (01n02) ◽  
pp. 59-63
Author(s):  
C.C. Hsu ◽  
T.C. Chu ◽  
Y.C. Chang ◽  
H.H. Hsu
Keyword(s):  
Charge State ◽  
Atomic Number ◽  
Maximum Energy ◽  
Target Atom ◽  
X Rays ◽  
X Ray ◽  
Relationship Of ◽  
The Relationship

The continuous X-ray of Be, Ni, and Cd targets induced by N +, N 2+, N 3+ ions were measured at the projectile energies of 50-, 70-, 100-, 150-, and 200-keV. Since the energy of the projectile is so low and the detecting limit of the detector is about one keV, the continuous X-ray would be the X-rays of nuclear and atomic bremsstrahlung (NB, AB). From the result of maximum energy of ħω. the relationship of a maximum energy ħω of below: [Formula: see text] Which indicates that the maximum energy of ħω depends on (-3/5) power of the atomic number of projectile, Zp. and on (-1/3q) power of the atomic number of target atom, Zt, and on the energy of projectile. Where q expresses the number of charge state of the projectile.

scholarly journals On the Thermal Interpretation of Hard X-Ray Bursts from Solar Flares

1974 ◽  
Vol 57 ◽  
pp. 395-412 ◽  
Author(s):  
John C. Brown
Keyword(s):  
Solar Flares ◽  
Thermal Conduction ◽  
Temperature Structure ◽  
X Rays ◽  
X Ray ◽  
Time Variations ◽  
Relationship Of ◽  
First Time ◽  
The Relationship ◽  
Continuous Temperature

The possible validity of thermal bremsstrahlung models of flare hard X-ray bursts is investigated quantitatively. In particular, the problem of rapid thermal conduction in ‘multi-temperature’ models is adequately examined for the first time by using a continuous temperature distribution consistent with the observed X-ray spectrum. This distribution is obtained from a general analytic solution for the temperature structure required to mimick any ‘non-thermal’ spectrum, the method being equally applicable to cosmic sources.It is concluded that the thermal interpretation might extend to X-rays of hundreds of keV, a result with important consequences for flare energetics. The relationship of such a model to observations of X-ray polarization and rapid time variations is also considered.

scholarly journals Comparison of Stimulus Energies Required to Elicit the ERG in Response to X-Rays and to Light

1962 ◽  
Vol 46 (2) ◽  
pp. 177-187 ◽  
Author(s):  
C. S. Bachofer ◽  
S. Esperance Wittry
Keyword(s):  
Visible Light ◽  
Rana Pipiens ◽  
Three Dimensional ◽  
Leopard Frog ◽  
X Rays ◽  
Sensitive Detector ◽  
Light Stimulation ◽  
X Ray ◽  
Wide Range ◽  
Relationship Of

The retina of Rana pipiens, the leopard frog or grass frog, is shown to be an extremely sensitive detector of x-rays. Its sensitivity to x-rays equals in some respects its sensitivity to visible light. The energy required for the response to visible light is so low that the reaction has long been known as one of the most sensitive in biological systems. An exact comparison is made of the amount of energy required in the stimulus to elicit an electroretinogram (ERG) in response to x-rays and in response to light. ERG's from threshold responses to maximal responses obtainable with x-rays and with light are reproduced. The rods of the retina are shown to be responsible for the production of the ERG. The actual amount of energy absorbed in the rhodopsin from x-ray and from light stimulation over a wide range of intensities and durations has been determined and has been related to the amplitude of the ERG. To the question whether light or x-rays are more efficient in eliciting an ERG, no simple or unequivocal answer can be given. The three dimensional relationship of amplitude of response, intensity of stimulus, and duration of stimulus shows rather unexpectedly that in certain regions light is more efficient while in other regions x-rays are more efficient.

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