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The salmonid pathogen Renibactenum salmoninarum is now known to be transmitted from parent to progeny within the salmonid egg. Two groups of experiments were conducted to evaluate the possible efficacy of the antibiotic erythromycin in preventing this mode of R. salmoninarum transmission. The first evaluated the widely practised disinfection technique of(More)
The current practice for monitoring of subsurface plumes involves the collection of water samples from sparsely distributed monitoring wells and laboratory analysis to determine chemical concentrations. In most field situations, cost and time constraints limit the number of samples that could be collected and analyzed for continuous monitoring of large,(More)
Irrigated croplands can be a major source of nitrate-N (NO-N) in groundwater due to leaching. In California, where high NO-N levels have been found in some areas of the Central Valley aquifer, the contribution from rice systems has not been determined. Nitrate leaching from rice systems was evaluated from soil cores (0-2 m), from the fate of N fertilizer in(More)
Please cite this article in press as: Loden, P., et models. J. Syst. Software (2009), doi:10.1016/j.j In this paper, we present the use of a wireless sensor network in a lab for subsurface contaminant plume monitoring with the objective of automatic calibration of groundwater transport models. A tank configured to simulate an aquifer was used as a testbed,(More)
A simple technique for significantly accelerating the growth of Renibacteriurn salmoninarum (Rs), causative agent of bacterial kidney disease in salmonids, is described and evaluated. The technique is based on the wellknown phenomenon, referred to as 'satellitism' or 'crossfeeding', in which a fastidious organism is induced to grow by placing it on an agar(More)
The reaction between cadmium and 2-(5-chloro-2-pyridylazo)-5-dimethylaminophenol (5-Cl DMPAP) in aqueous alcohol media at pH 8.8-10.7 results in an intense violet colour which is stable for at least 8 hr. The composition is 2:1 reagent:metal and the formation constant (5.29 +/- 0.01) x 10(18). Beer's law is obeyed up to 1.34 ppm of cadmium at 550 nm. The(More)