Article Abstract:
Examination of the influence of brackish water on the growth response of freshwater bacteria in the St. Lawrence River by the combined use of diffusion chambers and dilution culture reveals that exposure to salinities of 10 to 25% decreases the growth of the freshwater bacteria by 15 and 50%, respectively. Salinity of 2% stimulates the growth of freshwater bacteria and the bacterial abundance is at its peak under this condition. Salinity-related mortality of freshwater bacteria is not responsible for the decrease of bacterial abundance in the low-salinity water of the estuary.
User Contributions:
Comment about this article or add new information about this topic:
Article Abstract:
The reaction of a bacteria with a paramagnetic trivalent lanthadine ion is discussed. A scattered light analysis complemented the direct cell count in the magnetic deposition. The calibration of the magnetic separation was conducted on Escherichia coli. The magnetic cell deposition was verified for seven bacterial species. Immunofluorescence staining was also conducted. The utility of the method for urine or environmental water analysis was demonstrated.
User Contributions:
Comment about this article or add new information about this topic:
Article Abstract:
The polymerase chain reaction technique is used to identify the amoA gene encoding at the active site of ammonium monooxygenase from pure cultures of chemolithotrophic ammonium-oxidizing bacteria and the natural bacterial population of an unfiltered seawater sample. By partial sequencing the amplified DNA from Nitrosomonas europeae, Nitrosomonas crytolerans and Nitrosomonas oceanus, the amoA genes are detected.
User Contributions:
Comment about this article or add new information about this topic: