Search Results - "Passey, B."

Methods and limitations of 'clumped' CO2 isotope (Δ47) analysis by gas-source isotope ratio mass spectrometry by Huntington, K. W., Eiler, J. M., Affek, H. P., Guo, W., Bonifacie, M., Yeung, L. Y., Thiagarajan, N., Passey, B., Tripati, A., Daëron, M., Came, R.

“…The geochemistry of multiply substituted isotopologues (‘clumped‐isotope’ geochemistry) examines the abundances in natural materials of molecules, formula…”
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The isotope record of short- and long-term dietary changes in sheep tooth enamel: Implications for quantitative reconstruction of paleodiets by Zazzo, A., Balasse, M., Passey, B.H., Moloney, A.P., Monahan, F.J., Schmidt, O.

“…Quantitative reconstruction of paleodiet by means of sequential sampling and carbon isotope analysis in hypsodont tooth enamel requires a precise knowledge of…”
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Turnover of Carbon Isotopes in Tail Hair and Breath CO₂ of Horses Fed an Isotopically Varied Diet by Ayliffe, L. K., Cerling, T. E., Robinson, T., West, A. G., Sponheimer, M., Passey, B. H., Hammer, J., Roeder, B., Dearing, M. D., Ehleringer, J. R.

“…Temporal stable isotope records derived from animal tissues are increasingly studied to determine dietary and climatic histories. Despite this, the turnover…”
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Seasonal Bias in Soil Carbonate Formation and Its Implications for Interpreting High‐Resolution Paleoarchives: Evidence From Southern Utah by Huth, T. E., Cerling, T. E., Marchetti, D. W., Bowling, D. R., Ellwein, A. L., Passey, B. H.

“…Pedogenic carbonate is commonly used as a paleoarchive, but its interpretation is limited by our understanding of its formation conditions. We investigated…”
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Stable isotope ecology of the common hippopotamus by Cerling, T.E, Harris, J.M, Hart, J.A, Kaleme, P, Klingel, H, Leakey, M.G, Levin, N.E, Lewison, R.L, Passey, B.H

“…The diet of African hippopotamids can be documented through stable carbon isotope ratios (¹³C/¹²C) analyses of enamel and other tissues. The common…”
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Stable isotope ecology of fossil hippopotamids from the Lake Turkana Basin of East Africa by Harris, J.M, Cerling, T.E, Leakey, M.G, Passey, B.H

“…The diet of African hippopotamids can be documented through δ¹³C analyses of enamel and other tissues. Analysis of a 10-million-year sequence of hippopotamids…”
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Tooth enamel mineralization in ungulates: implications for recovering a primary isotopic time-series by Passey, Benjamin H, Cerling, Thure E

“…Temporal changes in the carbon and oxygen isotopic composition of an animal are an environmental and behavioral input signal that is recorded into the enamel…”
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Additive pressor effects of caffeine and stress in male medical students at risk for hypertension by Shepard, Jack D, al’Absi, Mustafa, Whitsett, Thomas L, Passey, Richard B, Lovallo, William R

“…The effects of caffeine on blood pressure (BP) and cortisol secretion were examined during elevated work stress in medical students at high versus low risk for…”
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Digestibility and nitrogen retention in llamas and goats fed alfalfa, C 3 grass, and C 4 grass hays by Robinson, T.F., Sponheimer, M., Roeder, B.L., Passey, B., Cerling, T.E., Dearing, M.D., Ehleringer, J.R.

“…The objective of this experiment was to determine the relative digestive capabilities and N retention between goats and llamas fed three forages. Four llamas…”
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Digestibility and nitrogen retention in llamas and goats fed alfalfa, C3 grass, and C4 grass hays by Robinson, T.F, Sponheimer, M, Roeder, B.L, Passey, B, Cerling, T.E, Dearing, M.D, Ehleringer, J.R

“…The objective of this experiment was to determine the relative digestive capabilities and N retention between goats and llamas fed three forages. Four llamas…”
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Acute blood pressure elevations with caffeine in men with borderline systemic hypertension by Pincomb, Gwendolyn A., Lovallo, William R., McKey, Barbara S., Sung, Bong Hee, Passey, Richard B., Everson, Susan A., Wilson, Michael F.

“…Whether the vasoconstrictive actions of caffeine are enhanced in hypertensive persons has not been demonstrated. Thus, caffeine (3.3 mg/kg) versus placebo was…”
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Orphans' tales: seasonal dietary changes in elephants from Tsavo National Park, Kenya by Cerling, Thure E., Passey, Benjamin H., Ayliffe, Linda K., Cook, Craig S., Ehleringer, James R., Harris, John M., Dhidha, Mohamed B., Kasiki, Samuel M.

“…The similarity of δ 13C and δ 15N patterns in hairs of different individuals from the Tsavo East orphaned elephant herd indicates that a single hair represents…”
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Laminated soil carbonate rinds as a paleoclimate archive of the Colorado Plateau by Huth, T. E., Cerling, T. E., Marchetti, D. W., Bowling, D. R., Ellwein, A. L., Passey, B. H., Fernandez, D. P., Valley, J. W., Orland, I. J.

“…Recent work suggests that the C- and O-isotope composition of laminated soil carbonate rinds can provide high-resolution (100 s yr/sample) information about…”
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Laminated soil carbonate rinds as a paleoclimate archive of the Colorado Plateau by Huth, T.E., Cerling, T.E., Marchetti, D.W., Bowling, D.R., Ellwein, A.L., Passey, B.H., Fernandez, D.P., Valley, J.W., Orland, I.J.

“…•A laminated soil carbonate rind from Utah acts as a paleoarchive from 35–5 ka.•We constrain soil conditions through time to enable quantitative…”
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Strengthened East Asian summer monsoons during a period of high-latitude warmth? Isotopic evidence from Mio-Pliocene fossil mammals and soil carbonates from northern China by Passey, Benjamin H., Ayliffe, Linda K., Kaakinen, Anu, Zhang, Zhaoqun, Eronen, Jussi T., Zhu, Yanming, Zhou, Liping, Cerling, Thure E., Fortelius, Mikael

“…The East Asian monsoons have fluctuated in concert with high-latitude warmth during the past several hundred thousand years, with humid summer monsoon-dominant…”
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Nitrogen isotopes in mammalian herbivores: hair δ15N values from a controlled feeding study by Sponheimer, M., Robinson, T., Ayliffe, L., Roeder, B., Hammer, J., Passey, B., West, A., Cerling, T., Dearing, D., Ehleringer, J.

“…Nitrogen isotope analysis is a common technique for investigating dietary behaviour in modern and archaeological populations. One of its primary uses is to…”
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Caffeine and Behavioral Stress Effects on Blood Pressure in Borderline Hypertensive Caucasian Men by Lovallo, William R, al'Absi, Mustafa, Pincomb, Gwen A, Everson, Susan A, Sung, Bong Hee, Passey, Richard B, Wilson, Michael F

“…Caffeine in dietary amounts raises blood pressure (BP), and its use increases during work stress; however, caffeine combined with behavioral stress has not…”
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Turnover of carbon isotopes in tail hair and breath CO 2 of horses fed an isotopically varied diet by Ayliffe, L. K., Cerling, T. E., Robinson, T., West, A. G., Sponheimer, M., Passey, B. H., Hammer, J., Roeder, B., Dearing, M. D., Ehleringer, J. R.

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Caffeine May Potentiate Adrenocortical Stress Responses in Hypertension-Prone Men by Lovallo, William R, Pincomb, Gwendolyn A, Sung, Bong Hee, Passey, Richard B, Sausen, Kenneth P, Wilson, Michael F

“…The effect of caffeine on blood cortisol levels and blood pressures was examined during rest and in response to a challenging psychomotor task in men with a…”
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Effects of caffeine on pressor regulation during rest and exercise in men at risk for hypertension by Pincomb, G A, Wilson, M F, Sung, B H, Passey, R B, Lovallo, W R

“…Caffeine-induced blood pressure elevations are well documented in habitual consumers, occurring through both vasoconstrictive and cardiostimulatory actions…”
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