NDLI: Killing of Escherichia coli by Exogenous Hydroxyl Radicals

Content Provider	IEEE Xplore Digital Library
Author	He Hua-gang Wu Chun-du Hou Ke-hui Zhu Shan-ying Yi Cheng-wu Chu Jin-yu
Copyright Year	2010
Abstract	The effects and mechanisms were studied on killing of Escherichia coli, a Gram negative bacterium by exogenous hydroxyl radical. The results showed that, exogenous OH• was efficient on killing of E. coli cells. Over 99% of them was killed in 0.5 mg/L OH• solution. And exogenous OH• could damage biomolecules of E. coli. The concentrations and integrities of DNA, RNA and intracellular protein decreased with the increasing of the concentration of OH•, and the degree of decreasing of intracellular soluble protein concentration was higher than that of DNA or RNA. This indicated that protein is the major target of OH• among biomolecules in the cell. After treated by OH•, the leakage of electrolytes from cells increased. In 0.5 mg/L OH• solution, the value of relative leakage reached to 16.21%, which might be severe and fatal to E. coli cell. It was speculated that cell membrane is the initial target of exogenous hydroxyl radical.
Starting Page	1
Ending Page	4
File Size	319752
Page Count	4
File Format	PDF
ISBN	9781424447121
ISSN	21517622
DOI	10.1109/ICBBE.2010.5516413
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-06-18
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Proteins Microorganisms RNA Ionization DNA Molecular biophysics Capacitive sensors Biomembranes Oxidation Pollution measurement
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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