An Oxygen Effect for Gamma-Radiation Induction of Radiation Resistance in Yeast

1984 ◽  
Vol 100 (1) ◽  
pp. 205 ◽  
Author(s):  
R. E. J. Mitchel ◽  
D. P. Morrison
Keyword(s):  
Gamma Radiation ◽  
Radiation Resistance ◽  
Oxygen Effect

scholarly journals Nanodiamonds as a state-of-the-art material for enhancing the gamma radiation resistance properties of polymeric membranes

2020 ◽  
Vol 2 (3) ◽  
pp. 1214-1227 ◽  
Author(s):  
Amita Bedar ◽  
Nitesh Goswami ◽  
Amit K. Singha ◽  
Virendra Kumar ◽  
Anil K. Debnath ◽  
...  
Keyword(s):  
Gamma Radiation ◽  
Radiation Resistance ◽  
Radiation Effects ◽  
State Of The Art ◽  
Polymeric Membranes ◽  
Polysulfone Membranes

Radiation effects on polysulfone membranes without and with incorporating nanodiamonds into the polysulfone matrix.

scholarly journals Significant improvement of gamma radiation resistance in CeO_2 doped phosphate glass by co-doping with Sb_2O_3

2017 ◽  
Vol 7 (3) ◽  
pp. 1113 ◽  
Author(s):  
Quanlong He ◽  
Pengfei Wang ◽  
Mengya Sun ◽  
Min Lu ◽  
Bo Peng
Keyword(s):  
Gamma Radiation ◽  
Phosphate Glass ◽  
Radiation Resistance ◽  
Co Doping

scholarly journals Investigation of the Influence of Gamma Radiation on Structural Transformations in Portlandcement Stone

2021 ◽  
pp. 60-66
Author(s):  
D. Anopko ◽  
O. Honchar ◽  
M. Kochevykh ◽  
L. Kushnierova
Keyword(s):  
Radioactive Waste ◽  
Gamma Radiation ◽  
Dose Rate ◽  
Radiation Resistance ◽  
Reference Sample ◽  
Radiation Energy ◽  
Structural Transformations ◽  
The Other ◽  
Radiation Equipment ◽  
High Level

The radiation resistance of concrete under the influence of large doses of gamma radiation was investigated. To study the behavior of concrete under the influence of gamma radiation, two series of samples were taken: оne was the reference sample, and the other was exposed to gamma radiation. The temperature of the irradiated samples during testing did not exceed 40 °C, the reference temperature was also accepted to be 40 °C. The dose of gamma radiation was 109 rad. Its value corresponds to the dose that concrete can receive when it comes into contact with high-level radioactive waste from the Shelter over 300 years. Characteristics of an industrial gamma radiation equipment are: radiation energy is 1.25 MeV and dose rate is 2 Mrad/h. The use of such equipment allows reaching a dose of 109 rad in less than a month, and 108 rad - in 4-5 days. Concretes that were 28 days old and stored under normal conditions were exposed to gamma radiation.

Changes in Elastomers Due to Radiation from Cobalt

1955 ◽  
Vol 28 (1) ◽  
pp. 12-18 ◽  
Author(s):  
S. D. Gehman ◽  
L. M. Hobbs
Keyword(s):  
Free Radical ◽  
Service Life ◽  
Gamma Radiation ◽  
Physical Properties ◽  
Radiation Resistance ◽  
Exposure Dose ◽  
Radical Reactions ◽  
Free Radical Reactions ◽  
Chemical Agents ◽  
Intense Radiation

Abstract A survey has been made of the effects of intense gamma radiation on the physical properties of elastomers and plastics. Such information is required to determine the types of elastomers which are most resistant to radiation, to estimate the service life of elastomers exposed to radiation, and to show favorable trends in compounding for radiation resistance. Intense radiation may affect the physical properties of elastomers benficially or adversely, depending on the type of elastomer and the exposure dose, although hardening and embrittlement are most commonly observed. The possibility is apparent of developing elastomer compounds with improved radiation resistance, especially by the use of chemical agents which affect free-radical reactions. The nature of the elastomer, however, will probably severely limit what can be accomplished by compounding.

Complete genome sequence of Hymenobacter sp. DG25B, a novel bacterium with gamma-radiation resistance isolated from soil in South Korea

2016 ◽  
Vol 217 ◽  
pp. 98-99 ◽  
Author(s):  
Myung Kyum Kim ◽  
Eun Sun Joo ◽  
Seung-Yeol Lee ◽  
Dae Sung Lee ◽  
Sathiyaraj Srinivasan ◽  
...  
Keyword(s):  
South Korea ◽  
Gamma Radiation ◽  
Genome Sequence ◽  
Radiation Resistance ◽  
Complete Genome Sequence ◽  
Complete Genome ◽  
Novel Bacterium

scholarly journals Characterization of the role of the RadS/RadR two-component system in the radiation resistance of Deinococcus radiodurans

Microbiology ◽  
2011 ◽  
Vol 157 (10) ◽  
pp. 2974-2982 ◽  
Author(s):  
Shruti S. Desai ◽  
Yogendra S. Rajpurohit ◽  
Hari S. Misra ◽  
Dileep N. Deobagkar
Keyword(s):  
Gamma Radiation ◽  
Radiation Resistance ◽  
Deinococcus Radiodurans ◽  
Response Regulator ◽  
Strand Break ◽  
Two Component System ◽  
Component System ◽  
Dna Damaging Agents ◽  
Two Component

Deinococcus radiodurans shows extraordinary tolerance to DNA damage, and exhibits differential gene expression and protein recycling. A putative response regulator, the DRB0091 (RadR) ORF, was identified from a pool of DNA-binding proteins induced in response to gamma radiation in this bacterium. radR is located upstream of drB0090, which encodes a putative sensor histidine kinase (RadS) on the megaplasmid. Deletion of these genes both individually and together resulted in hypersensitivity to DNA-damaging agents and a delayed or altered double-strand break repair. A ΔradRradS double mutant and a ΔradR single mutant showed nearly identical responses to gamma radiation and UVC. Wild-type RadR and RadS complemented the corresponding mutant strains, but also exhibited significant cross-complementation, albeit at lower doses of gamma radiation. The radS transcript was not detected in the ΔradR mutant, suggesting the existence of a radRS operon. Recombinant RadS was autophosphorylated and could catalyse the transfer of γ phosphate from ATP to RadR in vitro. These results indicated the functional interaction of RadS and RadR, and suggested a role for the RadS/RadR two-component system in the radiation resistance of this bacterium.

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