The effect of ultrasound at 256 KHz on Microcystis aeruginosa, with and without gas vacuoles
| dc.contributor.author | Jachlewski, Silke | |
| dc.contributor.author | Botes, Marelize | |
| dc.contributor.author | Cloete, T.E. (Thomas Eugene), 1958- | |
| dc.date.accessioned | 2013-02-20T06:56:18Z | |
| dc.date.available | 2013-02-20T06:56:18Z | |
| dc.date.issued | 2013-01 | |
| dc.description.abstract | The effect of ultrasound on the growth of M. aeruginosa confirmed to contain gas vacuoles and on a laboratory culture with no gas vacuoles was investigated. Both cultures were treated continuously for 9 d with an ultrasonic flow device. To evaluate the influence of ultrasound during the treatment, the chlorophyll-a concentration was measured daily. Furthermore, changes in culture characteristics, e.g., flotation and gas vesicle formation, were determined. The results showed that, in contrast to the control, both ultrasonic-treated cultures had a lower chlorophyll-a concentration and cell aggregates were disrupted. Transmission electron microscopy confirmed a collapse of gas vacuoles in the environmental culture, while the laboratory culture, which did not contain gas vacuoles, showed many membrane-damaged cells. It was concluded that ultrasonic treatment of M. aeruginosa caused the disruption of gas vacuoles and destruction of cell membranes. | en_US |
| dc.description.librarian | am2013 | en_US |
| dc.description.uri | http://www.wrc.org.za | en_US |
| dc.identifier.citation | Jachlewski, S, Botes, M & Cloete, TE 2013, 'The effect of ultrasound at 256 KHz on Microcystis aeruginosa, with and without gas vacuoles', Water SA, vol. 39, no. 1, pp. 171-174. | en_US |
| dc.identifier.issn | 0378-4738 (print) | |
| dc.identifier.issn | 1816-7950 (online) | |
| dc.identifier.other | 10.4314/wsa.v39i1.17 | |
| dc.identifier.uri | http://hdl.handle.net/2263/21126 | |
| dc.language.iso | en | en_US |
| dc.publisher | Water Research Council | en_US |
| dc.rights | Water Research Council | en_US |
| dc.subject | Ultrasound | en_US |
| dc.subject | Cyanobacteria | en_US |
| dc.subject | Microcystis aeruginosa | en_US |
| dc.subject | Chlorophyll | en_US |
| dc.subject | Gas vacuoles | en_US |
| dc.title | The effect of ultrasound at 256 KHz on Microcystis aeruginosa, with and without gas vacuoles | en_US |
| dc.type | Article | en_US |