Inhibitory Effect of Gamma-Irradiated Chitosan on the Growth of Denitrifiers
Joint Authors
Watanabe, Tomohide
Vilcáez, Javier
Source
International Journal of Microbiology
Issue
Vol. 2009, Issue 2009 (31 Dec. 2009), pp.1-5, 5 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2010-02-17
Country of Publication
Egypt
No. of Pages
5
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Abstract EN
In order to find an environmentally benign substitute to hazardous inhibitory agents, the inhibitory effect of γ-irradiated chitosans against a mixed culture of denitrifying bacteria was experimentally evaluated.
Unlike other studies using pure aerobic cultures, the observed effect was not a complete inhibition but a transient inhibition reflected by prolonged lag phases and reduced growth rates.
Raw chitosan under acid conditions (pH 6.3) exerted the strongest inhibition followed by the 100 kGy and 500 kGy irradiated chitosans, respectively.
Therefore, because the molecular weight of chitosan decreases with the degree of γ-irradiation, the inhibitory properties of chitosan due to its high molecular weight were more relevant than the inhibitory properties gained due to the modification of the surface charge and/or chemical structure by γ-irradiation.
High dosage of γ-irradiated appeared to increase the growth of mixed denitrifying bacteria in acid pH media.
However, in neutral pH media, high dosage of γ-irradiation appeared to enhance the inhibitory effect of chitosan.
American Psychological Association (APA)
Vilcáez, Javier& Watanabe, Tomohide. 2010. Inhibitory Effect of Gamma-Irradiated Chitosan on the Growth of Denitrifiers. International Journal of Microbiology،Vol. 2009, no. 2009, pp.1-5.
https://search.emarefa.net/detail/BIM-470653
Modern Language Association (MLA)
Vilcáez, Javier& Watanabe, Tomohide. Inhibitory Effect of Gamma-Irradiated Chitosan on the Growth of Denitrifiers. International Journal of Microbiology No. 2009 (2009), pp.1-5.
https://search.emarefa.net/detail/BIM-470653
American Medical Association (AMA)
Vilcáez, Javier& Watanabe, Tomohide. Inhibitory Effect of Gamma-Irradiated Chitosan on the Growth of Denitrifiers. International Journal of Microbiology. 2010. Vol. 2009, no. 2009, pp.1-5.
https://search.emarefa.net/detail/BIM-470653
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-470653