scholarly journals Progress in ionizing radiation resistance modification of polymer materials

2021 ◽  
Vol 2109 (1) ◽  
pp. 012021
Author(s):  
Guikai Zheng ◽  
Min Zhu ◽  
Chao Liu ◽  
Qiang Xiao ◽  
Qiqi Wang

Abstract With the wide application of polymer materials, much attention has been paid to the modification methods of polymer materials with high-energy radiation resistance to satisfy special environment, such as nuclear industry, space technology, medical equipmen. In this review, progress in ionizing radiation resistance modification of polymer materials is introduced in depth and different modification methods are compared. Finally, future perspectives of this field are discussed.

2009 ◽  
Vol 191 (16) ◽  
pp. 5240-5252 ◽  
Author(s):  
Dennis R. Harris ◽  
Steve V. Pollock ◽  
Elizabeth A. Wood ◽  
Reece J. Goiffon ◽  
Audrey J. Klingele ◽  
...  

ABSTRACT We have generated extreme ionizing radiation resistance in a relatively sensitive bacterial species, Escherichia coli, by directed evolution. Four populations of Escherichia coli K-12 were derived independently from strain MG1655, with each specifically adapted to survive exposure to high doses of ionizing radiation. D37 values for strains isolated from two of the populations approached that exhibited by Deinococcus radiodurans. Complete genomic sequencing was carried out on nine purified strains derived from these populations. Clear mutational patterns were observed that both pointed to key underlying mechanisms and guided further characterization of the strains. In these evolved populations, passive genomic protection is not in evidence. Instead, enhanced recombinational DNA repair makes a prominent but probably not exclusive contribution to genome reconstitution. Multiple genes, multiple alleles of some genes, multiple mechanisms, and multiple evolutionary pathways all play a role in the evolutionary acquisition of extreme radiation resistance. Several mutations in the recA gene and a deletion of the e14 prophage both demonstrably contribute to and partially explain the new phenotype. Mutations in additional components of the bacterial recombinational repair system and the replication restart primosome are also prominent, as are mutations in genes involved in cell division, protein turnover, and glutamate transport. At least some evolutionary pathways to extreme radiation resistance are constrained by the temporally ordered appearance of specific alleles.


1993 ◽  
Vol 18 (2) ◽  
pp. 127-136 ◽  
Author(s):  
Andrew A. Arrange ◽  
Tommy J. Phelps ◽  
Robert E. Benoit ◽  
Anthony V. Palumbo ◽  
David C. White

PLoS ONE ◽  
2019 ◽  
Vol 14 (1) ◽  
pp. e0199482 ◽  
Author(s):  
Steven T. Bruckbauer ◽  
Joseph D. Trimarco ◽  
Camille Henry ◽  
Elizabeth A. Wood ◽  
John R. Battista ◽  
...  

Membranes ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 163 ◽  
Author(s):  
Casimiro ◽  
Ferreira ◽  
Leal ◽  
Pereira ◽  
Monteiro

The use of ionizing radiation processing technologies has proven to be one of the most versatile ways to prepare a wide range of membranes with specific tailored functionalities, thus enabling them to be used in a variety of industrial, environmental, and biological applications. The general principle of this clean and environmental friendly technique is the use of various types of commercially available high-energy radiation sources, like 60Co, X-ray, and electron beam to initiate energy-controlled processes of free-radical polymerization or copolymerization, leading to the production of functionalized, flexible, structured membranes or to the incorporation of functional groups within a matrix composed by a low-cost polymer film. The present manuscript describes the state of the art of using ionizing radiation for the preparation and functionalization of polymer-based membranes for biomedical and environmental applications.


Astrobiology ◽  
2010 ◽  
Vol 10 (7) ◽  
pp. 717-732 ◽  
Author(s):  
Lewis R. Dartnell ◽  
Stephanie J. Hunter ◽  
Keith V. Lovell ◽  
Andrew J. Coates ◽  
John M. Ward

1998 ◽  
Vol 24 (4) ◽  
pp. 586-593 ◽  
Author(s):  
Juan Sun ◽  
Yuan Chen ◽  
Mingtao Li ◽  
Zhongliang Ge

10.1038/ng778 ◽  
2001 ◽  
Vol 29 (4) ◽  
pp. 426-434 ◽  
Author(s):  
Craig B. Bennett ◽  
L. Kevin Lewis ◽  
Gopalakrishnan Karthikeyan ◽  
Kirill S. Lobachev ◽  
Yong H. Jin ◽  
...  

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