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The Growth of Monoraphidium sp. and Scenedesmus sp. Cells in the Presence of Thorium
Joint Authors
da Costa, Antonio Carlos Augusto
Ferreira, Ana Cristina de Melo
de Queiroz, Juliana Cristina
Source
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-04-29
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Natural & Life Sciences (Multidisciplinary)
Medicine
Information Technology and Computer Science
Abstract EN
Toxicity of thorium by Monoraphidium sp.
and Scenedesmus sp.
was studied.
Microalgal cultures were inoculated in ASM-1 medium in presence and absence of thorium.
Its effect was monitored by direct counting on Fuchs-Rosenthal chamber and with software.
The toxicity of thorium over the species was observed for concentrations over 50.0 mg/L.
After 30 days, Monoraphidium cells decreased their concentration from 4.23×106 to 4.27×105 and 8.57×105 cells/mL, in the presence of 50.0 and 100.0 mg/L of thorium, respectively.
Scenedesmus sp.
cells were more resistant to thorium: for an initial cell concentration of 7.65×104 cells/mL it was observed a change to 5.25×105 and 5.12×105 cells/mL, in the presence of thorium at 50.0 and 100.0 mg/L, respectively.
This is an indication that low concentrations of the radionuclide favored the growth, and that Scenedesmus cells are more resistant to thorium than Monoraphidium cells.
The software used for comparison with direct count method proved to be useful for the improvement of accuracy of the results obtained, a decrease in the uncertainty and allowed recording of the data.
The presence of thorium suggests that low concentrations have a positive effect on the growth, due to the presence of the nitrate, indicating its potential for ecotoxicological studies.
American Psychological Association (APA)
de Queiroz, Juliana Cristina& Ferreira, Ana Cristina de Melo& da Costa, Antonio Carlos Augusto. 2012. The Growth of Monoraphidium sp. and Scenedesmus sp. Cells in the Presence of Thorium. The Scientific World Journal،Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-483451
Modern Language Association (MLA)
de Queiroz, Juliana Cristina…[et al.]. The Growth of Monoraphidium sp. and Scenedesmus sp. Cells in the Presence of Thorium. The Scientific World Journal No. 2012 (2012), pp.1-8.
https://search.emarefa.net/detail/BIM-483451
American Medical Association (AMA)
de Queiroz, Juliana Cristina& Ferreira, Ana Cristina de Melo& da Costa, Antonio Carlos Augusto. The Growth of Monoraphidium sp. and Scenedesmus sp. Cells in the Presence of Thorium. The Scientific World Journal. 2012. Vol. 2012, no. 2012, pp.1-8.
https://search.emarefa.net/detail/BIM-483451
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-483451