EFFECT OF OXYGEN DEFICIENCY ON RADIATION-INDUCED MITOTIC DAMAGE IN SYNCHRONOUSLY DIVIDING CELLS

1959 ◽  
Vol 37 (6) ◽  
pp. 1061-1066 ◽  
Author(s):  
W. F. Baldwin ◽  
T. N. Salthouse
Keyword(s):  
Blood Meal ◽  
Oxygen Deficiency ◽  
Dividing Cells ◽  
X Irradiation ◽  
Radiation Induced ◽  
Latent Effects ◽  
Effect Of Oxygen

The latent effects of X irradiation in delaying mitosis are readily observable in the epidermis of the insect Rhodnius owing to the degree of synchrony of division in these cells following a blood meal. At the dose employed in these studies, mitosis did not proceed beyond metaphase when the insects were exposed in air; after irradiation at the same dose in nitrogen, a prolonged division was completed with the greater part of the inhibition occurring during metaphase.

Effect of Oxygen on Radiation-Induced DNA Damage in Isolated Nuclei

1999 ◽  
Vol 152 (2) ◽  
pp. 144 ◽  
Author(s):  
Annamarie D. Horan ◽  
Albert R. Giandomenico ◽  
Cameron J. Koch
Keyword(s):  
Dna Damage ◽  
Isolated Nuclei ◽  
Radiation Induced ◽  
Effect Of Oxygen

Mouse one-cell embryos undergoing a radiation-induced G2 arrest may re-enter S-phase in the absence of cytokinesis

2002 ◽  
Vol 80 (7) ◽  
pp. 618-624 ◽  
Author(s):  
P Jacquet ◽  
J Buset ◽  
J Vankerkom ◽  
S Baatout ◽  
L de Saint-Georges ◽  
...  
Keyword(s):  
Calyculin A ◽  
Embryonic Cells ◽  
G2 Arrest ◽  
Cell Stage ◽  
Chromosome Fragments ◽  
X Irradiation ◽  
Radiation Induced ◽  
Mouse Zygotes ◽  
The One

PCC (premature chromosome condensation) can be used for visualizing and scoring damage induced by radiation in the chromatin of cells undergoing a G1 or G2 arrest. A method involving the fusion of irradiated single embryonic cells with single MI oocytes was used to induce PCC in mouse zygotes of the BALB/c strain, which suffer a drastic G2 arrest after X-irradiation (dose used 2.5 Gy). Other G2-arrested embryos were exposed in vitro to the phosphatase inhibitor calyculin A. Both methods furnished excellent chromosome preparations of the G2-arrested embryos. The mean number of chromosome fragments did not change significantly during G2 arrest, suggesting that zygotes of this strain are unable to repair DNA damage leading to such aberrations. Forty to fifty percent of the irradiated embryos were unable to cleave after G2 arrest and remained blocked at the one-cell stage for a few days before dying. PCC preparations obtained from such embryos suggested that about 30% of them had undergone a late mitosis not followed by cytokinesis and had entered a new DNA synthesis. These results are discussed in the light of recent observations in irradiated human cells deficient in the p53/14-3-3sigma pathway.Key words: PCC, embryo, oocyte, calyculin A, G2 arrest, cytokinesis.

Effect of oxygen deficiency on response of CR-39 on board scientific balloons

1999 ◽  
Vol 31 (1-6) ◽  
pp. 591-594 ◽  
Author(s):  
M. Fujii ◽  
Y. Hatano ◽  
A. Osawa ◽  
T. Saito ◽  
K. Yamamoto ◽  
...  
Keyword(s):  
Oxygen Deficiency ◽  
Effect Of Oxygen

Radiation-induced luminescence. Part. 2.—the effect of oxygen and bromobenzene

1956 ◽  
Vol 52 (0) ◽  
pp. 311-320 ◽  
Author(s):  
P. J. Berry ◽  
S. Lipsky ◽  
M. Burton
Keyword(s):  
Radiation Induced ◽  
Effect Of Oxygen

Effect of Oxygen Deficiency on the Superconducting Properties of YBCO

1991 ◽  
pp. 391-394 ◽  
Author(s):  
Yoko Suyama ◽  
Mamoru Matsumoto ◽  
Sachiko Kageyama ◽  
Isao Sato
Keyword(s):  
Oxygen Deficiency ◽  
Superconducting Properties ◽  
Effect Of Oxygen

Strahleninduzierte freie Radikale in phosphororganischen Verbindungen

1968 ◽  
Vol 23 (6) ◽  
pp. 771-777 ◽  
Author(s):  
G. Lassmann ◽  
W. Damerau ◽  
Kh. Lohs
Keyword(s):  
Yield Curve ◽  
Oxygen Effect ◽  
State Matrix ◽  
The Matrix ◽  
X Irradiation ◽  
Radiation Induced ◽  
Kinetics Of ◽  
Dose Dependent ◽  
Higher Doses ◽  
High Irradiation

Chlorine containing phosphonic acid esters (tridilorphon-type) have been investigated quantitatively by ESR after X-irradiation at room temperature. Radical yields are between 0.2 and 1.7 radicals per 100 eV. In the case of trichlorphon the radical concentration is 7.5·1018 spins per gram at 40 Mrad.Stabilisation and kinetics of radiation-induced radicals in the solid state matrix at high irradiation doses in dependence of storage time, oxygen-effect and temperature are discussed. The obtained results suggest a model for the behaviour of the matrix at high irradiation doses. According to this model the lattice of molecular crystals is modified by the accumulation of recombination products arising from the induced radicals. These lattice imperfections cause a diminution of stabilizing properties for the radicals. The decrease of the dose-yield-curve at higher doses than 40 Mrad and the dose-dependent radical kinetics during storage can be explained by this model.

Effect of Oxygen on Thermal and Radiation-Induced Chemistries in a Model Organotin Photoresist

2019 ◽  
Vol 11 (4) ◽  
pp. 4514-4522 ◽  
Author(s):  
Ryan T. Frederick ◽  
J. Trey Diulus ◽  
Danielle C. Hutchison ◽  
May Nyman ◽  
Gregory S. Herman
Keyword(s):  
Radiation Induced ◽  
Effect Of Oxygen
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