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Dormancy phase of Nitrosomonas europaea : the inducement and temporary suspension of dormancy phase and the effects on AMO and HAO

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dc.creator Hicks, Deborah A.
dc.date.accessioned 2007-12-11T17:37:20Z
dc.date.available 2007-12-11T17:37:20Z
dc.date.issued 1996-06-13
dc.identifier.uri http://hdl.handle.net/1957/7352
dc.description.abstract Nitrosomonas europaea is an autotrophic ammonia-oxidizer that has been found to cometabolize various halogenated hydrocarbons. This ability to cometabolize various compounds (many of which are considered contaminants) has caused N. europaea to be considered a potential bioremediational organism. However, ifN. europaea is to be used for bioremediation purposes, it will be necessary to understand N. europaea's normal state in its natural environment, (thought to be a dormancy stage), and to understand how N. europaea may be activated to cometabolize desired compounds. N. europaea was shown to enter a dormancy phase under stress and starvation conditions. This dormancy phase was exhibited by an extended lag time needed to achieve full growth when inocula taken from cultures 11 and 12 days old. The lag time was found to be related to the loss of the enzyme ammonia monooxygenase, but not to the enzyme hydroxylamine oxidoreductase. Cells could be temporarily prevented from entering dormancy stage and exhibiting long lag times by resuspending in medium containing no growth substrate. This temporary suspension of the aging process could be maintained for up to 5 days. en
dc.format.extent 327534 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.title Dormancy phase of Nitrosomonas europaea : the inducement and temporary suspension of dormancy phase and the effects on AMO and HAO en
dc.type Thesis en
dc.degree.name Undergraduate Thesis en
dc.degree.level Bachelor's en
dc.degree.discipline Agricultural Sciences en
dc.degree.grantor Oregon State University en
dc.description.digitization Master files scanned at 600 ppi (256 Grayscale) using Capture Perfect 3.0 on a Canon DR-9080C in TIF format. PDF derivative scanned at 300 ppi (256 B+W), using Capture Perfect 3.0, on a Canon DR-9080C. CVista PdfCompressor 3.1 was used for pdf compression and textual OCR. en


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