Michelle M. Ivey

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Current doctrine states that phosphorus is incorporated into cells in the pentavalent(V) oxidation state as orthophosphate. However, recent studies show that microorganisms contain enzymes used to metabolize reduced forms of phosphorous, including phosphite(III) and hypophosphite(I), which suggests that there is a natural source for these chemical species.(More)
Recent developments in microbiology suggest that reduced inorganic phosphorus oxyanions, including hypophosphite and phosphite, may be present in nature. These studies have inspired the development of specific and sensitive methods that detect phosphorus oxyanions in natural water. This paper will discuss a new technique that couples suppressed conductivity(More)
Fluoride in aquatic systems is increasing due to anthropogenic pollution, but little is known about how this fluoride affects organisms that live in and around aquatic habitats. Fluoride can bioaccumulate in structures comprised of calcium carbonate, such as shells and skeletons of both freshwater and saltwater species as diverse as snails, corals, and(More)
Historically, it was assumed that reactive, inorganic phosphorus present in pristine environments was solely in the form of orthophosphate. However, this assumption contradicts theories of biogenesis and the observed metabolic behavior of select microorganisms. This paper discusses the role of ion chromatography (IC) in elucidating the oxidation-reduction(More)
We have developed a new interface for a commercial ion trap mass spectrometer equipped with APCI capable of real-time measurements of gaseous compounds with limits of detection on the order of pptv. The new interface has been tested using the detection of Br2 and Cl2 over synthetic seawater ice at atmospheric pressure as a model system. A mechanical pump is(More)
Laser-induced desorption coupled with Fourier transform mass spectrometry (FTMS) has proven to be a useful technique for the studies of chemical reactions that occur in monolayers adsorbed on solid surfaces. The high sensitivity and ultrahigh mass resolution have been extremely useful in the study of reactions in complex monolayer mixtures made up of(More)
Ultrathin films of γ-Al2O3 grown on NiAl(001) were studied using high-resolution electron energy loss spectroscopy (HREELS), Auger electron spectroscopy (AES), and low-energy electron diffraction (LEED). Growth of the ultrathin oxide films with water produces a hydroxylated surface, as confirmed by vibrational spectroscopy. Also, exposure of a film grown(More)
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