Search Results - "Majestic, Brian J"

Source apportionment of aerosol iron in the marine environment using iron isotope analysis by Mead, Chris, Herckes, Pierre, Majestic, Brian J., Anbar, Ariel D.

“…Iron (Fe) is a critical nutrient for phytoplankton. In the open ocean, this demand coupled with scarce supply often makes Fe the limiting factor in…”
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Characterization and benefits of selenium uptake by an Astragalus hyperaccumulator and a non-accumulator by Statwick, Joseph, Brian J. Majestic, Anna A. Sher

“…BACKGROUND AND AIMS: We characterized the relationship between soil and leaf concentrations of selenium in a hyperaccumulator and a non-accumulator to test the…”
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Methods for the Detection and Characterization of Silica Colloids by Microsecond spICP-MS by Montaño, Manuel D, Majestic, Brian J, Jämting, Åsa K, Westerhoff, Paul, Ranville, James F

“…The rapid development of nanotechnology has led to concerns over their environmental risk. Current analytical techniques are underdeveloped and lack the…”
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Mineral Dust and Iron Solubility: Effects of Composition, Particle Size, and Surface Area by Marcotte, Aurelie R., Anbar, Ariel D., Majestic, Brian J., Herckes, Pierre

“…There is significant iron deposition in the oceans, approximately 14–16 Tg annually from mineral dust aerosols, but only a small percentage (approx. 3%) of it…”
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The Impact of Particle Size, Relative Humidity, and Sulfur Dioxide on Iron Solubility in Simulated Atmospheric Marine Aerosols by Cartledge, Benton T, Marcotte, Aurelie R, Herckes, Pierre, Anbar, Ariel D, Majestic, Brian J

“…Iron is a limiting nutrient in about half of the world’s oceans, and its most significant source is atmospheric deposition. To understand the pathways of iron…”
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Stable isotopes of lead and strontium as tracers of sources of airborne particulate matter in Kyrgyzstan by Dewan, Nitika, Majestic, Brian J., Ketterer, Michael E., Miller-Schulze, Justin P., Shafer, Martin M., Schauer, James J., Solomon, Paul A., Artamonova, Maria, Chen, Boris B., Imashev, Sanjar A., Carmichael, Greg R.

“…Central Asia is dominated by an arid climate and desert-like conditions, leading to the potential for long-range transport of desert dust within and out of the…”
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Iron Speciation in PM2.5 From Urban, Agriculture, and Mixed Environments in Colorado, USA by Salazar, Joseph R., Pfotenhauer, David J., Leresche, Frank, Rosario‐Ortiz, Fernando L., Hannigan, Michael P., Fakra, Sirine C., Majestic, Brian J.

“…Atmospheric iron solubility varies depending on whether the particles are collected in rural or urban areas, with urban areas showing increased iron…”
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Characterization of soluble iron in urban aerosols using near-real time data by Oakes, Michelle, Rastogi, Neeraj, Majestic, Brian J., Shafer, Martin, Schauer, James J., Edgerton, Eric S., Weber, Rodney J.

“…We present the first near‐real time (12 min) measurements of fine particle (PM2.5) water soluble ferrous iron (WS_Fe(II)) measured in two urban settings:…”
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Evaluation of polyurethane foam, polypropylene, quartz fiber, and cellulose substrates for multi-element analysis of atmospheric particulate matter by ICP-MS by Upadhyay, Nabin, Majestic, Brian J, Prapaipong, Panjai, Herckes, Pierre

“…Traditional methods for the analysis of trace metals require particulate matter (PM) collected on specific filter substrates. In this paper, methods for…”
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Elemental and iron isotopic composition of aerosols collected in a parking structure by Majestic, Brian J., Anbar, Ariel D., Herckes, Pierre

“…The trace metal contents and iron isotope composition of size-resolved aerosols were determined in a parking structure in Tempe, AZ, USA. Particulate matter…”
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Formation of Environmentally Persistent Free Radicals from the Irradiation of Polycyclic Aromatic Hydrocarbons by Sarmiento, Desiree J., Majestic, Brian J.

“…Polycyclic aromatic hydrocarbons (PAHs) provide a complex matrix for environmentally persistent free radicals (EPFRs) to stabilize in particulate matter,…”
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Investigation into Photoinduced Auto-Oxidation of Polycyclic Aromatic Hydrocarbons Resulting in Brown Carbon Production by Haynes, John P, Miller, Keith E, Majestic, Brian J

“…Brown carbon (BrC) is a collection of oxidized atmospheric aromatic compounds detected worldwide with broad functionality. This multifunctional nature allows…”
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Measurement report: Atmospheric aging of combustion-derived particles – impact on stable free radical concentration and its ability to produce reactive oxygen species in aqueous media by Runberg, Heather L, Majestic, Brian J

“…Environmentally persistent free radicals (EPFRs) are a pollutant found on fine atmospheric particulate matter (PM2.5), particularly on PM2.5 formed from…”
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Effect of Pollution Controls on Atmospheric PM2.5 Composition during Universiade in Shenzhen, China by Dewan, Nitika, Wang, Yu-Qin, Zhang, Yuan-Xun, Zhang, Yang, He, Ling-Yan, Huang, Xiao-Feng, Majestic, Brian

“…The 16th Universiade, an international multi-sport event, was hosted in Shenzhen, China from 12 to 23 August 2011. During this time, officials instituted the…”
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Development of a Wet-Chemical Method for the Speciation of Iron in Atmospheric Aerosols by Majestic, Brian J, Schauer, James J, Shafer, Martin M, Turner, Jay R, Fine, Philip M, Singh, Manisha, Sioutas, Constantinos

“…The ability to quantify the chemical and physical forms of transition metals in atmospheric particulate matter (PM) is essential in determining potential human…”
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Photochemical Aging of Atmospheric Particulate Matter in the Aqueous Phase by Leresche, Frank, Salazar, Joseph R, Pfotenhauer, David J, Hannigan, Michael P, Majestic, Brian J, Rosario-Ortiz, Fernando L

“…This study focused on the photoaging of atmospheric particulate matter smaller than 2.5 μm (PM2.5) in the aqueous phase. PM2.5 was collected during a winter, a…”
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Solubility and speciation of atmospheric iron in buffer systems simulating cloud conditions by Upadhyay, Nabin, Majestic, Brian J., Herckes, Pierre

“…The solubility of iron (Fe) in atmospheric particulate matter (PM) is important to understand its chemistry and potential bioavailability to ocean…”
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Water-soluble iron emitted from vehicle exhaust is linked to primary speciated organic compounds by Salazar, Joseph R, Cartledge, Benton T, Haynes, John P, York-Marini, Rachel, Robinson, Allen L, Drozd, Greg T, Goldstein, Allen H, Fakra, Sirine C, Majestic, Brian J

“…Iron is the most abundant transition element in airborne particulate matter (PM), primarily existing as Fe(II) or Fe(III). Generally, the fraction of…”
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Role of polycyclic aromatic hydrocarbons on the photo-catalyzed solubilization of simulated soil-bound atmospheric iron by Haynes, John P., Majestic, Brian J.

“…The process of photo-oxidation of exhaust-based aromatics and the effect they have on the release of soluble iron from an otherwise insoluble soil is explored…”
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Respirable antimony and other trace-elements inside and outside an elementary school in Flagstaff, AZ, USA by Majestic, Brian J., Turner, Joseph A., Marcotte, Aurelie R.

“…Because people spend almost 90% of their time indoors, ambient air monitors may severely underestimate actual exposure to atmospheric particulate matter (PM)…”
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