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Ghiorse, Bill
Cornell Faculty Member
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Positions
- Professor, Microbiology (BIOMI), College of Agriculture and Life Sciences (CALS)
- Professor, Continuing Education Winter and Summer Sessions, School of Continuing Education and Summer Sessions - 2012
A veteran Microbiology educator, who has extensive research experience in Geomicrobiology, Biogeochemistry and Environmental Microbiology.
Research Areas
- aquatic science
- biocomplexity
- biogeochemistry
- biological and environmental engineering
- cell biology
- disease control
- ecology
- environmental sciences
- microbiology
- pathogens
- science and technology studies
- toxicology
- watershed science
- Affiliations
- Research
- Publications
- Teaching
- Service
- Background
- Other
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Affiliations
other Cornell affiliations
Research
research overview
- My major resarch focus has been geomicrobiology and biogeochemistry of Mn-oxidizing bacteria. I have also done pioneering research on deep subsurface and groundwater microbiology and, more recently on the survival and fate of Cryptosporidium parvum in the NYC watershed.
research activities
keywords
- biofilms
- biogeochemistry
- geomicrobiology
- microscopy
- public health microbiology
- toxic metal pollution
submitted impact statement
- Water supply safety and permeability of the Cryptosporidium parvum oocyst wall
- Mechanisms of toxic metal binding in microbial biofilms
- Biological properties affecting survival and transport of Cryptosporidium parvum oocysts in watershed environments.
- Biological properties affecting survival and transport of Cryptosporidium parvum oocysts in watershed environments
- Biological factors affecting survival and transport of Cryptosporidium parvum oocysts in watershed environments
Publications
individual publications
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academic article
- An uncertain role for Cu(II) in stimulating Mn oxidation by Leptothrix discophora SS-1. Archives of Microbiology. 193 :89. 2011
- Significance of wall structure, macromolecular composition, and surface polymers to the survival and transport of Cryptosporidium parvum oocysts.. Applied Environmental Microbiology. 76:1926-1934. 2010
- Iron requirement for Mn (II) oxidation by Leptothrix discophora SS-1. . Applied and Environmental Microbiology. 75:1229-1235. 2009
- Spatial distributions of copper in microbial biofilms by scanning electrochemical microscopy. Environmental Science & Technology. 41:936-941. 2007
- An Evaluation of Web-Based Case Studies in Microscopy. Microbiology Education. 7:12-19. 2006
- Cycling of biogenic Mn-oxides in a model microbial predator-prey system. Geomicrobiology Journal. 23:37-43. 2006
- Cycling of Biogenic Mn-oxides in a Model Microbial Predator-Prey System. Geomicrobiology Journal. 23:37-43. 2005
- Determination of spatial distributions of zinc and active biomass in microbial biofilms by two-photon laser scanning microscopy. Applied Environmental Microbiology. 71:4014-4021. 2005
- Exploring biofilms with two-photon laser scanning microscopy.. Abstracts of Papers of the American Chemical Society. 229. 2005
- An Aufwuchs chamber slide for high-resolution confocal laser scanning microscopy and stereo imaging of microbial communities in natural biofilms. Microbial Ecology. 47:266-270. 2004
- Methanotrophic activity, abundance, and diversity in forested swamp pools: Spatiotemporal dynamics and influences on methane fluxes. Geomicrobiology Journal. 21:257-271. 2004
- Polaromonas naphthalenivorans gen. nov., sp. nov., a naphthalene –degrading bacterium from naphthalene-contaminated sediment. International Journal of Systematic and Evolutionary Microbiology. 54:93-97. 2004
- Preferential flow and transport Cryptosporidium parvum Oocysts through the Vadose Zone: Experiments and modeling. Vadose Zone Journal. 3:262-270. 2004
- Simulating the effect of liquid CO2 on Cryptosporidium parvum oocysts in aquifer material. J. Environ. Eng. 130:1547-1551. 2004
- A Quantitative Analysis of DNA Extraction and Purification from Compost.. Journal of Microbiological Methods. 54:37-45. 2003
- Preferential Transport of Cryptosporidium Parvum Oocysts in Variably-Saturated Subsurface Environments. Water Environment Research. 75:113-120. 2003
- Characterization of a Sinorhizobium isolate and its extracellular polymer implicated in pollutant transport in soil. Applied and Environmental Microbiology. 68:423-426. 2002
- Effect of oxide formation mechanisms on lead adsorption by biogenic manganese (hydr)oxides, iron (hydr)oxides, and their mixtures. Environmental Science & Technology. 36:421-425. 2002
- Kinetics of Mn(II) oxidation by Leptothrix discophora SS1. Geochimica Et Cosmochimica Acta. 66:773-781. 2002
- Adsorption properties of mixed ferric and biogenic manganese oxides.. Abstracts of Papers of the American Chemical Society. 221. 2001
- Kinetics of Mn oxidation by Leptothrix discophora SS1.. Abstracts of Papers of the American Chemical Society. 221. 2001
- Phenanthrene desorption from soil in the presence of bacterial extracellular polymer: Observations and model predictions of dynamic behavior. Water Research. 35:835-843. 2001
- Structure and carbohydrate analysis of the exopolysaccharide capsule of Pseudomonas putida G7. Environmental Microbiology. 3:774-784. 2001
- The effects of pH and surface composition of Pb adsorption to natural freshwater biofilms. Environmental Science & Technology. 35:3182-3189. 2001
- Adsorption of Pb and Cd onto metal oxides and organic material in natural surface coatings as determined by selective extractions: new evidence for the importance of Mn and Fe oxides. Water Research. 34:427-436. 2000
- High purity 14CH4 generation using the thermophilic acetotrophic methanogen, Methanothrix sp. strain CALS-1. Journal of Microbiological Methods. 35:151-156. 1999
- Independent prediction of naphthalene transport and biodegradation in soil with a mathematical model. Biotechnology and Bioengineering. 65:65-75. 1999
- Lead binding to metal oxide and organic phases of natural aquatic biofilms. Limnology and Oceanography. 44:1715-1729. 1999
- Production of biogenic Mn oxides by Leprothrix discophora SS-1 in a chemically defined growth medium and evaluation of their Pb adsorption characteristics. Applied and Environmental Microbiology. 65:175-180. 1999
- Seasonal patterns and controls on methane and carbon dioixde fluxes in forested swamp pools. Geomicrobiology Journal. 16:325-331. 1999
- Trace metal adsorptive capacity of discreet naturally occurring surface coating phases in aquatic environments.. Abstracts of Papers of the American Chemical Society. 217. 1999
- Transport of cryptosporidium parvum oocysts through saturated columns. Journal of Environmental Quality. 28:809-815. 1999
- Growth kinetics of Pseudomonas putida G7 on naphthalene and occurrence of naphthalene toxicity during nutrient deprivation. Biotechnology and Bioengineering. 59:587-94. 1998
- Influence of pretreatment and experimental conditions on electrophoretic mobility and hydrophobicity of cryptosporidium parvum oocysts. Applied Environmental Microbiology. 64:4439-4445. 1998
- Evaluation of the utility of bacterial extracellular polymers for treatment of metal-contaminated soils: Polymer persistence, mobility, and the influence of lead. Water Research. 31:2827-2839. 1997
- Natural horizontal transfer of a naphthalene dioxygenase gene between bacteria native a contaminated field site. Applied Environmental Microbiology. 63:2330-2337. 1997
- Determination of iron colloid size distribution in the presence of suspended cells: Application to iron deposition onto a biofilm surface. Water Research. 30:2413-2423. 1996
- Modeling oligotrophic biofilm formation and lead adsorption to biofilm components. Abstracts of Papers of the American Chemical Society. 212. 1996
- Modeling oligotrophic biofilm formation and lead adsorption to biofilm components. Environmental Science & Technology. 30:2027-2035. 1996
- Regulation of microbial phenanthrene mineralization in sediments by sorbent- sorbate contact time, inoculum, and gamma irradiation-induced sterilization artifacts. Environmental Toxicology and Chemistry. 15:1901-1907. 1996
- Development of a rapid 14C-based field method for assessing potential biodegradation of organic compounds in soil and sediment samples. Journal of Microbiological Methods. 21:317-327. 1995
- Lead Distribution in a Simulated Aquatic Environment - Effects of Bacterial Biofilms and Iron-Oxide. Water Research. 29:1934-1944. 1995
- Mobilization of Adsorbed Cadmium and Lead in Aquifer Material by Bacterial Extracellular Polymers. Water Research. 29:421-430. 1995
- Modeling Interactions of Toxic Metals with Suspended Bacterial-Cells, Extracellular Polymer and Biofilms in a Simulated Fresh-Water Environment. Abstracts of Papers of the American Chemical Society. 209. 1995
- Natural selection of PAH-degrading bacterial guilds at coal tar disposal sites. Environmental Health Perspectives. 103:107-111. 1995
- Trace-Metal Mobilization in Soil by Bacterial Polymers. Environmental Health Perspectives. 103:53-58. 1995
- Deposition of Colloidal Iron onto a Biofilm Surface - Determination of the Particle-Size Distribution of Colloidal Iron(Iii) Oxyhydroxide in the Presence of Suspended Bacterial-Cells. Abstracts of Papers of the American Chemical Society. 208. 1994
- Quantitative cell lysis of indigenous microorganisms and rapid extraction of microbial DNA from sediment. Applied and Environmental Microbiology. 60:1572-1580. 1994
- Polymerase chain reaction amplification of naphthalene catabolic and 16S rRNA gene sequences from indigenous sediment bacteria. Applied and Environmental Microbiology. 59:687-694. 1993
- Contrasts between subsurface microbial communities and their metabolic adaptation to polycyclic aromatic hydrocarbons at a forested and urban coal tar disposal site. Microbial Ecology. 24:199-213. 1992
- Experimental Apparatus for Selection of Adherent Microorganisms under Stringent Growth-Conditions. Applied and Environmental Microbiology. 57:1987-1996. 1991
- In situ biodegradation: Microbiological patterns in a contaminated aquifer. Science. 252:830-833. 1991
- Trace-Metal Interactions with Microbial Biofilms in Natural and Engineered Systems. Crc Critical Reviews in Environmental Control. 17:273-306. 1987
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booksection
- An Evaluation of Web-Based Case Studies in Microscopy 2006
- Case Studies in Microscopy 2005
Teaching
teaching overview
- I teach a large undergraduate course in General Microbiology whcih is taken by students of Biology, Engineering Nutrion, Animal Science, Food Science. pPrevet and premed students from many different majors take this course.
teaching activities
Service
outreach overview
- Outreach activities include occasional involvement with parties interested in survival and transport of pathogens (Cryptosporidium oocysts) in the New York City watershed.
service to the profession
- American Academy of Microbiology, Committee for Assessing Distinction of Nominees to Fellowship Working in Environmental Microbiology Member 1998 -
- Executive Committee and Treasurer, International Symposia for Environmental Biogeochemistry Member 1995 -
- Executive Committee, International Symposium for Subsurface Microbiology Member 1990 -
- American Academy of Microbiology, Fellowship Recruitment Committee Member 2003 - 2006
- American Academy of Microbiology, General and Applied Microbiology Recruitment Committee Member 2003 - 2004
- American Society for Microgiology Aquatic & Terrestrial Division Chairperson 1988 - 1989
Background
education and training
- Ph.D. in, Rensselaer Polytechnic Institute 1973
- M.S. in, Rensselaer Polytechnic Institute 1969
- B.A. in, University of Vermont 1963
awards and honors
Other
college
- CALS
research keyword
- biofilms
- biogeochemistry
- geomicrobiology
- microscopy
- public health microbiology
- toxic metal pollution