Search Results - "Ryan, Peter C."

Four-dimensional characterization of a PFOA-contaminated fractured rock aquifer (FRA) in Bennington, Vermont, U.S.A by Kim, Jonathan J., Ryan, Peter C., Schroeder, Timothy, Romanowicz, Edwin, Boutt, David, Belaval, Marcel, Shanley, James

“…Between 2016 and 2019, the Vermont Department of Environmental Conservation discovered that groundwater from over 50% (355/628) of wells and springs in the…”
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The 10 Å to 7 Å halloysite transition in a tropical soil sequence, Costa Rica by Kautz, Christopher Q, Ryan, Peter C

“…Soils developed on Pleistocene andesitic lava flows and fluvial detritus in the Atlantic coastal plain of Costa Rica display a clay mineral assemblage that…”
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The influence of metamorphic grade on arsenic in metasedimentary bedrock aquifers: A case study from Western New England, USA by Ryan, Peter C., West, David P., Hattori, Keiko, Studwell, Sarah, Allen, David N., Kim, Jonathan

“…Elevated As occurs in many meta-sedimentary bedrock aquifers where elevated bulk-rock As content is one of the primary controls on the concentration of As in…”
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Reaction pathways of clay minerals in tropical soils; insights from kaolinite-smectite synthesis experiments by Ryan, Peter C, Huertas, F. Javier

“…Pedogenic smectite from a young (Holocene) tropical soil was reacted in Al-rich solution at 150°C for a range of reaction times (3 to 120 days) in order to…”
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Arsenic in a fractured slate aquifer system, New England, USA: Influence of bedrock geochemistry, groundwater flow paths, redox and ion exchange by Ryan, Peter C., Kim, Jonathan J., Mango, Helen, Hattori, Keiko, Thompson, Ali

“…•Arsenic is elevated above 10ppb in 22% (52/236) of bedrock wells in a fractured slate aquifer system.•As concentrations in pyrites occurring in black and dark…”
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Ultramafic-derived arsenic in a fractured bedrock aquifer by Ryan, Peter C., Kim, Jonathan, Wall, Andrew J., Moen, Jonathan C., Corenthal, Lilly G., Chow, Daniel R., Sullivan, Colleen M., Bright, Kevin S.

“…► Arsenic is elevated in groundwater from a fractured bedrock aquifer system in northern Vermont, USA. ► The arsenic source is serpentinized ultramafic rock. ►…”
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The smectite-to-disordered kaolinite transition in a tropical soil chronosequence, Pacific Coast, Costa Rica by Fisher, G. Burch, Ryan, Peter C

“…Soils developed on Quaternary fluvial fill terraces in the humid tropics of Costa Rica display progressive changes in mineral assemblage, chemical composition…”
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Pedogenic clay formation from allochthonous parent materials in a periglacial alpine critical zone by Munroe, Jeffrey S., Ryan, Peter C., Proctor, Atticus

“…•The studied periglacial alpine soils and regolith contain considerable pedogenic clay.•Smectite-rich clays formed through weathering of andesitic ash.•Illite…”
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Quantifying the contribution of dust to alpine soils in the periglacial zone of the Uinta Mountains, Utah, USA by Munroe, Jeffrey S., Norris, Emmet D., Olson, Pratt M., Ryan, Peter C., Tappa, Michael J., Beard, Brian L.

“…•Alpine soils were studied in the Uinta Mountains (Utah, USA).•Soils are geochemically intermediate between rock and dust end members.•Mixing models were…”
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Illitization of montmorillonite in ammonium solutions under hydrothermal conditions by Bentabol, María, Lamarca-Irisarri, Daniel, Van Driessche, Alexander E.S., Ryan, Peter C., Huertas, F. Javier

“…In diagenetic solutions, ammonium may be incorporated into smectites as an exchangeable cation and become fixed within the interlayer space of illites and…”
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Parent material and chemical weathering in alpine soils on Mt. Mansfield, Vermont, USA by Munroe, Jeffrey S., Farrugia, Gianina, Ryan, Peter C.

“…We compared the elemental composition of soil and bedrock samples to determine the extent of chemical weathering and the nature of the soil parent material in…”
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Ultramafic-derived arsenic in a fractured bedrock aquifer: Arsenic and Other Toxic Elements in Global Groundwater Systems by RYAN, Peter C, KIM, Jonathan, WALL, Andrew J, MOEN, Jonathan C, CORENTHAL, Lilly G, CHOW, Daniel R, SULLIVAN, Colleen M, BRIGHT, Kevin S

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Partial ureteric obstruction: a new variable canine experimental model by Ryan, P C, Fitzpatrick, J M

“…An experimental model of ureteric obstruction should be accurate and persistent, and allow variation of the degree of obstruction. A model was tested in 28…”
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Experimental testicular torsion: do spermatozoal autoantigens cause immunological activation? by RYAN, P. C, FITZPATRICK, J. M

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TRICHOCEREUS BRIDGESII by GLEDHILL, R. J., Ryan, Peter C.

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