Dale Griffin, Ph.D. (Former Employee)
Science and Products
Filter Total Items: 87
Intercontinental dispersal of bacteria and archaea by transpacific winds
Microorganisms are abundant in the upper atmosphere, particularly downwind of arid regions, where winds can mobilize large amounts of topsoil and dust. However, the challenge of collecting samples from the upper atmosphere and reliance upon culture-based characterization methods have prevented a comprehensive understanding of globally dispersed airborne microbes. In spring 2011 at the Mt. Bachelor
Authors
D. Smith, H. Timonen, D. Jaffe, Dale W. Griffin, M. Birmele, K.D. Perry, P.D. Ward, M. Roberts
Remote sensing applications for assessing the effects of air quality on human health: An emphasis on volcanic ash and desert dust
No abstract available.
Authors
Dale W. Griffin, Jesse C. McEntee, Denise Catronovo, Myles Lyles, Elena N. Naumova
Free tropospheric transport of microorganisms from Asia to North America
Microorganisms are abundant in the troposphere and can be transported vast distances on prevailing winds. This study measures the abundance and diversity of airborne bacteria and fungi sampled at the Mt. Bachelor Observatory (located 2.7 km above sea level in North America) where incoming free tropospheric air routinely arrives from distant sources across the Pacific Ocean, including Asia. Overall
Authors
D. Smith, Dan Jaffe, Michele Birmele, Dale W. Griffin, Andrew Schuerger, J. Hee, Michael Roberts
Epifluorescent direct counts of bacteria and viruses from topsoil of various desert dust storm regions
Topsoil from arid regions is the main source of dust clouds that move through the earth's atmosphere, and microbial communities within these soils can survive long-range dispersion. Microbial abundance and chemical composition were analyzed in topsoil from various desert regions. Statistical analyses showed that microbial direct counts were strongly positively correlated with calcium concentration
Authors
Cristina Gonzalez-Martin, Nuria Teigell-Perez, Mark Lyles, Basilio Valladares, Dale W. Griffin
In-ground disposal of human sewage can contaminate nearshore waters and reefs with bacteria and viruses
No abstract available.
Authors
Erin K. Lipp, Dale W. Griffin, J.C. Futch
Initiation of long-term coupled microbiological, geochemical, and hydrological experimentation within the seafloor at North Pond, western flank of the Mid-Atlantic Ridge
Integrated Ocean Drilling Program (IODP) Expedition 336 successfully initiated subseafloor observatory science at a young mid-ocean-ridge flank setting. All of the drilled sites are located in the North Pond region of the Atlantic Ocean (22°45′N, 46°05′W) in 4414–4483 m water depth. This area is known from previous ocean drilling and site survey investigations as a site of particularly vigorous ci
Authors
K.J. Edwards, N. Backert, W. Bach, K. Becker, A. Klaus, Dale W. Griffin, L. Anderson, A.G. Haddad, Y. Harigane, P.L. Campion, H. Hirayama, H.J. Mills, S.M. Hulme, K. Nakamura, S.L. Jorgensen, B. Orcutt, T.L. Insua, Y.-S. Park, V. Rennie, E.C. Salas, O. Rouxel, F. Wang, J.A. Russel, C.G. Wheat, K. Sakata, M. Brown, J.L. Magnusson, Z. Ettlinger
Pathogenic human viruses are present in residential canals
No abstract available.
Authors
Dale W. Griffin
Navigational inlets are conduits for land-based sources of pollution
No abstract available.
Authors
J.C. Flutch, Dale W. Griffin, Erin K. Lipp
The use of epifluorescent microscopy and quantitative polymerase chain reaction to determine the presence/absence and identification of microorganisms associated with domestic and foreign wallboard samples
Epifluorescent microscopy and quantitative polymerase chain reaction (qPCR) were utilized to determine the presence, concentration and identification of bacteria, and more specifically sulfate reducing bacteria (SRB) in subsamples of Chinese and North American wallboard, and wallboard-mine rock. Bacteria were visible in most subsamples, which included wallboard-lining paper from each side of the w
Authors
Dale W. Griffin
The high life: Transport of microbes in the atmosphere
Microbes (bacteria, fungi, algae, and viruses) are the most successful types of life on Earth because of their ability to adapt to new environments, reproduce quickly, and disperse globally. Dispersal occurs through a number of vectors, such as migrating animals or the hydrological cycle, but transport by wind may be the most common way microbes spread. General awareness of airborne microbes preda
Authors
D.J. Smith, Dale W. Griffin, D.A. Jaffe
Observations on the use of membrane filtration and liquid impingement to collect airborne microorganisms in various atmospheric environments
The influence of sample-collection-time on the recovery of culturable airborne microorganisms using a low-flow-rate membrane-filtration unit and a high-flow-rate liquid impinger were investigated. Differences in recoveries were investigated in four different atmospheric environments, one mid-oceanic at an altitude of ~10.0 m, one on a mountain top at an altitude of ~3,000.0 m, one at ~1.0 m altitu
Authors
Dale W. Griffin, C. Gonzalez, N. Teigell, Terry Petrosky, D.E. Northup, M. Lyles
Microbial survival in the stratosphere and implications for global dispersal
Spores of Bacillus subtilis were exposed to a series of stratosphere simulations. In total, five distinct treatments measured the effect of reduced pressure, low temperature, high desiccation, and intense ultraviolet (UV) irradiation on stratosphereisolated and ground-isolated B. subtilis strains. Environmental conditions were based on springtime data from a mid-latitude region of the lower strato
Authors
David J. Smith, Dale W. Griffin, Richard D. McPeters, Peter D. Ward, Andrew C. Schuerger
Science and Products
Filter Total Items: 87
Intercontinental dispersal of bacteria and archaea by transpacific winds
Microorganisms are abundant in the upper atmosphere, particularly downwind of arid regions, where winds can mobilize large amounts of topsoil and dust. However, the challenge of collecting samples from the upper atmosphere and reliance upon culture-based characterization methods have prevented a comprehensive understanding of globally dispersed airborne microbes. In spring 2011 at the Mt. Bachelor
Authors
D. Smith, H. Timonen, D. Jaffe, Dale W. Griffin, M. Birmele, K.D. Perry, P.D. Ward, M. Roberts
Remote sensing applications for assessing the effects of air quality on human health: An emphasis on volcanic ash and desert dust
No abstract available.
Authors
Dale W. Griffin, Jesse C. McEntee, Denise Catronovo, Myles Lyles, Elena N. Naumova
Free tropospheric transport of microorganisms from Asia to North America
Microorganisms are abundant in the troposphere and can be transported vast distances on prevailing winds. This study measures the abundance and diversity of airborne bacteria and fungi sampled at the Mt. Bachelor Observatory (located 2.7 km above sea level in North America) where incoming free tropospheric air routinely arrives from distant sources across the Pacific Ocean, including Asia. Overall
Authors
D. Smith, Dan Jaffe, Michele Birmele, Dale W. Griffin, Andrew Schuerger, J. Hee, Michael Roberts
Epifluorescent direct counts of bacteria and viruses from topsoil of various desert dust storm regions
Topsoil from arid regions is the main source of dust clouds that move through the earth's atmosphere, and microbial communities within these soils can survive long-range dispersion. Microbial abundance and chemical composition were analyzed in topsoil from various desert regions. Statistical analyses showed that microbial direct counts were strongly positively correlated with calcium concentration
Authors
Cristina Gonzalez-Martin, Nuria Teigell-Perez, Mark Lyles, Basilio Valladares, Dale W. Griffin
In-ground disposal of human sewage can contaminate nearshore waters and reefs with bacteria and viruses
No abstract available.
Authors
Erin K. Lipp, Dale W. Griffin, J.C. Futch
Initiation of long-term coupled microbiological, geochemical, and hydrological experimentation within the seafloor at North Pond, western flank of the Mid-Atlantic Ridge
Integrated Ocean Drilling Program (IODP) Expedition 336 successfully initiated subseafloor observatory science at a young mid-ocean-ridge flank setting. All of the drilled sites are located in the North Pond region of the Atlantic Ocean (22°45′N, 46°05′W) in 4414–4483 m water depth. This area is known from previous ocean drilling and site survey investigations as a site of particularly vigorous ci
Authors
K.J. Edwards, N. Backert, W. Bach, K. Becker, A. Klaus, Dale W. Griffin, L. Anderson, A.G. Haddad, Y. Harigane, P.L. Campion, H. Hirayama, H.J. Mills, S.M. Hulme, K. Nakamura, S.L. Jorgensen, B. Orcutt, T.L. Insua, Y.-S. Park, V. Rennie, E.C. Salas, O. Rouxel, F. Wang, J.A. Russel, C.G. Wheat, K. Sakata, M. Brown, J.L. Magnusson, Z. Ettlinger
Pathogenic human viruses are present in residential canals
No abstract available.
Authors
Dale W. Griffin
Navigational inlets are conduits for land-based sources of pollution
No abstract available.
Authors
J.C. Flutch, Dale W. Griffin, Erin K. Lipp
The use of epifluorescent microscopy and quantitative polymerase chain reaction to determine the presence/absence and identification of microorganisms associated with domestic and foreign wallboard samples
Epifluorescent microscopy and quantitative polymerase chain reaction (qPCR) were utilized to determine the presence, concentration and identification of bacteria, and more specifically sulfate reducing bacteria (SRB) in subsamples of Chinese and North American wallboard, and wallboard-mine rock. Bacteria were visible in most subsamples, which included wallboard-lining paper from each side of the w
Authors
Dale W. Griffin
The high life: Transport of microbes in the atmosphere
Microbes (bacteria, fungi, algae, and viruses) are the most successful types of life on Earth because of their ability to adapt to new environments, reproduce quickly, and disperse globally. Dispersal occurs through a number of vectors, such as migrating animals or the hydrological cycle, but transport by wind may be the most common way microbes spread. General awareness of airborne microbes preda
Authors
D.J. Smith, Dale W. Griffin, D.A. Jaffe
Observations on the use of membrane filtration and liquid impingement to collect airborne microorganisms in various atmospheric environments
The influence of sample-collection-time on the recovery of culturable airborne microorganisms using a low-flow-rate membrane-filtration unit and a high-flow-rate liquid impinger were investigated. Differences in recoveries were investigated in four different atmospheric environments, one mid-oceanic at an altitude of ~10.0 m, one on a mountain top at an altitude of ~3,000.0 m, one at ~1.0 m altitu
Authors
Dale W. Griffin, C. Gonzalez, N. Teigell, Terry Petrosky, D.E. Northup, M. Lyles
Microbial survival in the stratosphere and implications for global dispersal
Spores of Bacillus subtilis were exposed to a series of stratosphere simulations. In total, five distinct treatments measured the effect of reduced pressure, low temperature, high desiccation, and intense ultraviolet (UV) irradiation on stratosphereisolated and ground-isolated B. subtilis strains. Environmental conditions were based on springtime data from a mid-latitude region of the lower strato
Authors
David J. Smith, Dale W. Griffin, Richard D. McPeters, Peter D. Ward, Andrew C. Schuerger