التفاصيل البيبلوغرافية
| العنوان: |
Research Article Inhibitory Effect of Gamma-Irradiated Chitosan on the Growth of Denitrifiers |
| المؤلفون: |
Javier Vilcáez, Tomohide Watanabe |
| المساهمون: |
The Pennsylvania State University CiteSeerX Archives |
| المصدر: |
ftp://ftp.ncbi.nlm.nih.gov/pub/pmc/fb/25/Int_J_Microbiol_2009_Feb_17_2009_418595.tar.gz |
| المجموعة: |
CiteSeerX |
| الوصف: |
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. Copyright © 2009 J. Vilcáez and T. Watanabe. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 1. |
| نوع الوثيقة: |
text |
| وصف الملف: |
application/zip |
| اللغة: |
English |
| Relation: |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.7197 |
| الاتاحة: |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.356.7197 |
| Rights: |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
| رقم الانضمام: |
edsbas.76195FDB |
| قاعدة البيانات: |
BASE |