ORCID Profile
0000-0002-1923-9746
Current Organisations
Washington State University
,
Technische Universität Berlin
,
Arizona State University
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Publisher: Informa UK Limited
Date: 2003
Publisher: Wiley
Date: 09-2003
DOI: 10.1111/J.1745-6584.2003.TB02408.X
Abstract: Several viral transport experiments were conducted in a model aquifer 1 m long, using bacteriophages MS2 and phiX174 at various pH (4.6 to 8.3) conditions, to increase our understanding of virus behavior in ground water. The results indicate the existence of a critical pH at which the virus behavior changes abruptly. This is supported by data from field and batch experiments. The critical pH is determined to be 0.5 unit below the highest isoelectric point of the virus and porous medium. When water pH is below the critical pH, the virus has an opposite charge to at least one component of the porous medium, and is almost completely and irreversibly removed from the water. This suggests that electrostatic attraction at a subcritical water pH condition is an important factor controlling virus attenuation in ground water. The concept of critical pH can assist in the design of geologic barriers for preventing viral contamination in ground water.
Publisher: Wiley
Date: 11-2003
Publisher: American Geophysical Union (AGU)
Date: 30-04-2002
DOI: 10.1029/2002EO000128
Publisher: Elsevier BV
Date: 06-2002
Publisher: Schweizerbart
Date: 2009
Publisher: MDPI AG
Date: 27-12-2012
DOI: 10.3390/LIFE3010021
Abstract: The presence of microbialite structures in a freshwater, dimictic mid-latitudelake and their establishment after the last ice age about 10,000 years ago is puzzling.Freshwater calcite microbialites at Pavilion Lake, British Columbia, Canada, consist of acomplex community of microorganisms that collectively form large, ordered structuredaggregates. This distinctive assemblage of freshwater calcite microbialites was studied through standard microbial methods, morphological observations, phospholipid fatty acid(PLFA) analysis, DNA sequencing and the identification of quorum sensing molecules.Our results suggest that the microbialites may represent a transitional form from theexclusively prokaryotic colonial precursors of stromatolites to the multicellular organismicaggregates that give rise to coral reefs.
No related grants have been discovered for Dirk Schulze-Makuch.