Results 281 to 290 of about 174,544 (303)

Bioluminescent Bacteria as Indicators of Chemical Contamination of Coastal Waters

Journal of Environmental Quality, 2005
ABSTRACTThe ratio of bioluminescent to total bacteria (bioluminescent ratio, BLR) as an indicator of a variety of types of anthropogenic contamination of estuarine ecosystems was evaluated through a series of laboratory and field studies. Laboratory studies indicated that the BLR of natural bacterioplankton communities was proportionally reduced in the
M E, Frischer, J M, Danforth, T F, Foy, R, Juraske   +3 more
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Prevalence and Persistence of Antimicrobial Resistance in Broiler Indicator Bacteria

Microbial Drug Resistance, 2010
This study explored the prevalence and persistence of acquired antimicrobial resistance in Escherichia coli and Enterococcus faecium from healthy broilers. In 32 broiler farms, cloacal samples were taken during two production rounds, with one production
Davy, Persoons, Jeroen, Dewulf, Annemieke, Smet, Lieve, Herman, Marc, Heyndrickx, An, Martel, Boudewijn, Catry, Patrick, Butaye, Freddy, Haesebrouck   +8 more
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Application of a tetrazolium dye as an indicator of viability in anaerobic bacteria

Journal of Microbiological Methods, 1999
The use of the redox dye 5-cyano-2,3,-ditolyl tetrazolium chloride (CTC) for evaluating the metabolic activity of aerobic bacteria has gained wide application in recent years. In this study, we examined the utility of CTC in capturing the metabolic activity of anaerobic bacteria.
V K, Bhupathiraju, M, Hernandez, D, Landfear, L, Alvarez-Cohen   +3 more
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Ecological Control of Fecal Indicator Bacteria in an Urban Stream

Environmental Science & Technology, 2009
Fecal indicator bacteria (FIB) have long been used as a marker of fecal pollution in surface waters subject to point source and non-point source discharges of treated or untreated human waste. In this paper, we set out to determine the source(s) of elevated FIB concentrations in Cucamonga Creek, a concrete-lined urban stream in southern California ...
Cristiane Q, Surbeck, Sunny C, Jiang, Stanley B, Grant   +2 more
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[25] Luminous bacteria as an oxygen indicator

1978
Publisher Summary This chapter discusses luminous bacteria as oxygen indicators. The high oxygen affinity of the luminous system of the bacteria does not reside in any special speed of reaction of the luciferase system with oxygen over and above that of cytochrome oxidase; it relies specifically upon the low turnover number of the system.
B. Chance, R. Oshino
openaire   +1 more source

Water quality indicators: bacteria, coliphages, enteric viruses

International Journal of Environmental Health Research, 2013
Water quality through the presence of pathogenic enteric microorganisms may affect human health. Coliform bacteria, Escherichia coli and coliphages are normally used as indicators of water quality. However, the presence of above-mentioned indicators do not always suggest the presence of human enteric viruses.
Johnson, Lin, Atheesha, Ganesh
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Effect of high-power microwave on indicator bacteria for sterilization

IEEE Transactions on Biomedical Engineering, 1996
According to the superiority sterilization, a specially-designed microwave disinfector using high-power microwave energy was made. A series of sterilizing experiments have been made to determine the effect of microwave energy on several typical indicator bacteria such as Bacillus subtilis var.
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Water quality monitoring : bacteria as indicators

2014
J. H.
Bowdre, Jean Handy, 1947-, Krieg, Noel R.   +1 more
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Marine bacteria as indicators of upwelling in the Sea

1963
The “oxidase reaction” (using p-amino-dimethyl-aniline oxalate as the reagent) has been used to distinguish oxidase-negative from oxidase-positive bacteria from the sea, when grown on membrane filters. By this means, it has been shown (a) that under conditions of stable stratification of the sea as in the tropics, a relationship exists between the ...
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Statistical Evaluation of Factors Affecting Indicator Bacteria in Urban Storm-Water Runoff

Journal of Environmental Engineering, ASCE, 2010
J M Hathaway, W F Hunt
exaly