Search Results - "Witter, A"

Competition among marine phytoplankton for different chelated iron species by Hutchins, David A, Witter, Amy E, Butler, Alison, Luther, George W

“…Dissolved-iron availability plays a critical role in controlling phytoplankton growth in the oceans,. The dissolved iron is overwhelmingly (∼99%) bound to…”
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Is gravidity associated with COVID‐19 vaccination among pregnant women in Jamaica? by Pinkney, Jodian A., Bogart, Laura M., Carroll, Kamali N., Bryan, Lenroy R., Witter, Givana A., Ashour, Dina, Hoeppner, Susanne S., Hurtado, Rocio M., Goldfarb, Ilona T., Psaros, Christina, Hyle, Emily P., Ojikutu, Bisola O.

“…Introduction In 2021, Jamaica's maternal mortality ratio doubled as a result of COVID‐19‐related deaths. Yet, COVID‐19 vaccination among pregnant Jamaican…”
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Gauging climate change effects at local scales: weather-based indices to monitor insect harassment in caribou by Witter, Leslie A, Johnson, Chris J, Croft, Bruno, Gunn, Anne, Poirier, Lisa M

“…Climate change is occurring at an accelerated rate in the Arctic. Insect harassment may be an important link between increased summer temperature and reduced…”
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Trifluoroacetate Profiles in the Arctic, Atlantic, and Pacific Oceans by Scott, B. F, Macdonald, R. W, Kannan, K, Fisk, A, Witter, A, Yamashita, N, Durham, L, Spencer, C, Muir, D. C. G

“…A series of depth profiles was collected at 22 sites in the Arctic, North and South Atlantic, and Pacific Oceans to determine spatial patterns for…”
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Determination of conditional stability constants and kinetic constants for strong model Fe-binding ligands in seawater by Witter, Amy E., Hutchins, David A., Butler, Alison, Luther, George W.

“…Conditional stability constants and the rates of formation and dissociation for Fe 3+ complexation with nine model ligands were measured in chelexed,…”
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The Quantitative Determination of Butylated Hydroxytoluene in Chewing Gum Using GC–MS by Witter, A. E

“…An undergraduate experiment for the quantitative determination of the synthetic antioxidant butylated hydroxytoluene (BHT) in chewing gum is described. A…”
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Variation in Fe-organic complexation with depth in the Northwestern Atlantic Ocean as determined using a kinetic approach by Witter, Amy E., Luther, George W.

“…1-nitroso-2-napthol (1N2N) was used as a complexing ligand to study Fe speciation and the kinetic interaction of Fe 3+ with excess organic ligands in seawater…”
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Assessing the potential for ash canopy tree replacement via current regeneration following emerald ash borer-caused mortality on southeastern Michigan landscapes by Kashian, Daniel M., Witter, John A.

“…▶ Emerald ash borer has extirpated ash trees in southeastern Michigan. ▶ Established ash regeneration is plentiful enough to re-establish overstory ash. ▶…”
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Behavioural trade-offs in response to external stimuli: time allocation of an Arctic ungulate during varying intensities of harassment by parasitic flies by Witter, Leslie A., Johnson, Chris J., Croft, Bruno, Gunn, Anne, Gillingham, Michael P.

“…1. Macroparasites may be a major factor shaping animal behaviour. Tundra ecosystems inhabited by caribou and reindeer (Rangifer tarandus) are known for large…”
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Insect-weather indicies and the effects of insect harassment on caribou behaviour and activity budgets by Witter, Leslie A.

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Copper (II) complexation in northern California rice field waters: an investigation using differential pulse anodic and cathodic stripping voltammetry by Witter, A.E, Mabury, S.A, Jones, A.D

“…Differential pulse anodic stripping voltammetry (DPASV) and competitive ligand equilibration-cathodic stripping voltammetry (CLE-CSV) demonstrated that≥99% of…”
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Quantitative Determination of Nicotine and Cotinine in Urine and Sputum Using a Combined SPME-GC/MS Method by Fan, X, Lam, M, Mathers, D. T, Mabury, S. A, Witter, A. E, Klinger, D. M

“…An advanced undergraduate experiment for the analysis of nicotine metabolites in urine and sputum is described. Students use solid-phase microextraction (SPME)…”
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Chemical characterization of organic constituents from sulfide-rich produced water using gas chromatography/mass spectrometry by Witter, Amy E., Jones, A. Daniel

“…Dichloromethane extracts of oil field wastewater samples collected over a period of 3 months were characterized using gas chromatography/mass spectrometry…”
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Economical analysis at different institutions of the treatment of borderline resectable and locally advanced pancreatic cancer by Manjani, D., Witter, A., Denis, N., Schoen, N., Rashid, O.M.

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Effects of host switching on gypsy moth (Lymantria dispar (L.)) under field conditions by Stoyenoff, J.L, Witter, J.A, Montgomery, M.E, Chilcote, C.A

“…Effects of various single and two species diets on the performance of gypsy moth (Lymantria dispar (L.)) were studied when this insect was reared from hatch to…”
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Comparison of methods for inorganic sulfur speciation in a petroleum production effluent by Witter, Amy E., Jones, A. Daniel

“…Multiple analytical techniques were compared for identification and quantification of inorganic sulfur species present in a sulfidic waste effluent (produced…”
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Iron speciation in the Arabian Sea by Witter, Amy E., Lewis, Brent L., Luther III, George W.

“…Fe(III) speciation was measured in seawater collected as part of the United States Joint Global Ocean Flux (US JGOFS) Arabian Sea Process Study, Cruise TN045,…”
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Nutritional Indices in the Gypsy Moth (Lymantria dispar (L.)) under Field Conditions and Host Switching Situations by J. L. Stoyenoff, Witter, J. A., Montgomery, M. E.

“…A large proportion of gypsy moths (Lymantria dispar (L.)) are likely to experience multiple species diets in the field due to natural wandering and host…”
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Sulfate adsorption in forest soils of the Great Lakes Region by MacDonald, Neil W., Burton, Andrew J., Witter, John A., Richter, Daniel D.

“…Sulfate adsorption by forest soils modifies the impact of pollutant deposition on cation leaching processes. We examined relationships among SO4(-2)…”
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Health and subjective well-being: a meta-analysis by Okun, M A, Stock, W A, Haring, M J, Witter, R A

“…A meta-analysis was conducted of the health/subjective well-being relationship, based upon studies of United States adults published prior to 1980. Dependent…”
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