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Use of a fluorescent redox probe for direct visualization of actively respiring bacteria
The use of CTC greatly facilitated microscopic detection and enumeration of metabolically active bacteria in environmental samples, and actively respiring bacteria were readily distinguishable from abiotic particles and other background substances, which typically fluoresced at shorter wavelengths. Expand
Use of 5-cyano-2,3-ditolyl tetrazolium chloride for quantifying planktonic and sessile respiring bacteria in drinking water
Direct microscopic quantification of respiring bacteria indicated significant cell-to-cell variation in respiratory activity and reduced electron transport following a brief period of nutrient starvation. Expand
Identification and catabolic activity of well-derived gasoline-degrading bacteria from a contaminated aquifer
The catabolic activities of well-derived, gasoline-degrading bacteria associated with this contaminated aquifer are consonant with in situ adaptation at the site, implying marked strain diversity. Expand
Chlorine resistance patterns of bacteria from two drinking water distribution systems
Bacteria from the chlorinated system were more resistant to both the combined and free forms of chlorine than those from the unchlorinated system, suggesting that there may be selection for more chlorine-tolerant microorganisms in chlorinated waters. Expand
Microbial fouling of reverse-osmosis membranes used in advanced wastewater treatment technology: chemical, bacteriological, and ultrastructural analyses
Biofouling of reverse-osmosis membranes was investigated at an advanced wastewater treatment facility and electron microscopy revealed that the biofilm on the feedwater surface of the membrane was 10 to 20 microns thick and was composed of several layers of compacted bacterial cells. Expand
Scanning electron microscope evidence for bacterial colonization of a drinking-water distribution system
The surfaces of water distribution mains and suspended particulate matter from drinking water were examined by using scanning electron microscopy to investigate the nature and extent of association of microorganisms with these surfaces and the elemental constitution of the pipe surface was determined. Expand
Characterization of gliding motility in Flexibacter polymorphus.
The data are consistent with a motility mechanism involving limited motion in numerous mechanically independent (yet functionally coordinated) domains on the cell surface of Flexibacter polymorphus, suggesting that the locomotor apparatus functions at constant torque. Expand
Biofouling potentials of microporous polysulfone membranes containing a sulfonated polyether-ethersulfone/polyethersulfone block copolymer: correlation of membrane surface properties with bacterial
Multivariate methods were used to identify relationships between bacterial attachment (biofouling potential), water transport, and the surface properties of nine modified polysulfone (MPS) membranesExpand
Catabolite-mediated mutations in alternate toluene degradative pathways in Pseudomonas putida
The results suggest that benzyl alcohol mediates irreversible defects in both a plasmid-associated meta pathway and an alternate chromosomal pathway in toluene-exposed Pseudomonas putida 54g. Expand
Iron Bacteria in Drinking-Water Distribution Systems: Elemental Analysis of Gallionella Stalks, Using X-Ray Energy-Dispersive Microanalysis
Stalks recovered directly from water samples were analyzed for their elemental composition by using X-ray energy-dispersive microanalysis, marking the first such analysis of Gallionella stalks recovered from environmental samples without prior subculturing in artificial laboratory media. Expand