scholarly journals Insights into Ionizing-Radiation-Resistant Bacteria S-Layer Proteins and Nanobiotechnology for Bioremediation of Hazardous and Radioactive Waste

10.5772/64146 ◽  
2016 ◽  
Author(s):  
Kaïs Ghedira ◽  
Houcemeddine Othman ◽  
Taieb Saied ◽  
Zouhair Majdi Baccar ◽  
Faouzi Hosni ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Radioactive Waste ◽  
Resistant Bacteria ◽  
Radiation Resistant

Diversity of ionizing radiation-resistant bacteria obtained from the Taklimakan Desert

2013 ◽  
Vol 55 (1) ◽  
pp. 135-140 ◽  
Author(s):  
Li Zhi-Han Yu ◽  
Xue-Song Luo ◽  
Ming Liu ◽  
Qiaoyun Huang
Keyword(s):  
Ionizing Radiation ◽  
Resistant Bacteria ◽  
Taklimakan Desert ◽  
The Taklimakan Desert ◽  
Radiation Resistant

scholarly journals Extensive Diversity of Ionizing-Radiation-Resistant Bacteria Recovered from Sonoran Desert Soil and Description of Nine New Species of the Genus Deinococcus Obtained from a Single Soil Sample

2005 ◽  
Vol 71 (9) ◽  
pp. 5225-5235 ◽  
Author(s):  
Fred A. Rainey ◽  
Keren Ray ◽  
Margarida Ferreira ◽  
Bridget Z. Gatz ◽  
M. Fernanda Nobre ◽  
...  
Keyword(s):  
Ionizing Radiation ◽  
Soil Sample ◽  
Sonoran Desert ◽  
Desert Soil ◽  
Resistant Bacteria ◽  
Rrna Gene ◽  
Culturable Bacteria ◽  
Bacterial Isolates ◽  
Arid Soil ◽  
Radiation Resistant

ABSTRACT The ionizing-radiation-resistant fractions of two soil bacterial communities were investigated by exposing an arid soil from the Sonoran Desert and a nonarid soil from a Louisiana forest to various doses of ionizing radiation using a 60Co source. The numbers of surviving bacteria decreased as the dose of gamma radiation to which the soils were exposed increased. Bacterial isolates surviving doses of 30 kGy were recovered from the Sonoran Desert soil, while no isolates were recovered from the nonarid forest soil after exposure to doses greater than 13 kGy. The phylogenetic diversities of the surviving culturable bacteria were compared for the two soils using 16S rRNA gene sequence analysis. In addition to a bacterial population that was more resistant to higher doses of ionizing radiation, the diversity of the isolates was greater in the arid soil. The taxonomic diversity of the isolates recovered was found to decrease as the level of ionizing-radiation exposure increased. Bacterial isolates of the genera Deinococcus, Geodermatophilus, and Hymenobacter were still recovered from the arid soil after exposure to doses of 17 to 30 kGy. The recovery of large numbers of extremely ionizing-radiation-resistant bacteria from an arid soil and not from a nonarid soil provides further ecological support for the hypothesis that the ionizing-radiation resistance phenotype is a consequence of the evolution of other DNA repair systems that protect cells against commonly encountered environmental stressors, such as desiccation. The diverse group of bacterial strains isolated from the arid soil sample included 60 Deinococcus strains, the characterization of which revealed nine novel species of this genus.

scholarly journals Basal DNA repair machinery is subject to positive selection in ionizing-radiation-resistant bacteria

BMC Genomics ◽  
2008 ◽  
Vol 9 (1) ◽  
pp. 297 ◽  
Author(s):  
Haïtham Sghaier ◽  
Kaïs Ghedira ◽  
Alia Benkahla ◽  
Insaf Barkallah
Keyword(s):  
Dna Repair ◽  
Ionizing Radiation ◽  
Positive Selection ◽  
Resistant Bacteria ◽  
Radiation Resistant

Spirosoma profusum sp. nov., and Spirosoma validum sp. nov., radiation-resistant bacteria isolated from soil in South Korea

2021 ◽  
Author(s):  
Yuna Park ◽  
Soohyun Maeng ◽  
Tuvshinzaya Damdintogtokh ◽  
Jing Zhang ◽  
Min-Kyu Kim ◽  
...  
Keyword(s):  
South Korea ◽  
Resistant Bacteria ◽  
Radiation Resistant

Detecting Sources of Ionizing Radiation in the Waste Stream

2002 ◽  
Author(s):  
Michael Needham
Keyword(s):  
United States ◽  
Ionizing Radiation ◽  
Radioactive Waste ◽  
Solid Waste ◽  
Negative Impact ◽  
Industrial Process ◽  
Control Program ◽  
The United States ◽  
Radioactive Waste Disposal ◽  
Radioactive Material

Why is the detection of radioactive sources important to the solid waste industry?: Radioactive material is used extensively in the United States in research, medicine, education, and industry for the benefit of society (e.g. smoke detectors, industrial process gauges, medical diagnosis/treatment). Generally speaking, the Nuclear Regulatory Commission and state governments regulate the use and disposal of radioactive materials. Licensed radioactive waste disposal facilities receive the bulk of the waste generated in the United States with exceptions for low-level waste (e.g. medical patient waste) that may be disposed of as municipal waste. According to the Conference of Radiation Control Program Directors, Inc (CRCPD)., there has been an increasing number of incidence involving the detection of prohibited radioactive wastes at solid waste management facilities. While the CRCPD acknowledges that the increased incidence may be partially attributed to the growing number of solid waste facilities that have detection systems, undetected sources of ionizing radiation can harm the environment, have a negative impact on employee health and safety, and result in significant remedial actions. Implementing an effective detection/response plan can aid in the proper management of radioactive waste and serve to minimize the potential for negative outcomes.

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