Hydrogen peroxide method intercomparision study in seawater

Miller, Gary W.; Morgan, Chris A.; Kieber, David J.; King, D. Whitney; Snow, J.; Heikes, Brian G.; Mopper, Kenneth; Kiddle, James J.

doi:10.1016/j.marchem.2005.07.001

Cited by 52 publications

(50 citation statements)

References 18 publications

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“…The similar concentrations of H 2 O 2 was likely due to similar geochemistry across the three sites [e.g., Fe(II) ∼30-40 µM, pH ∼3-3.5, T ∼68-80 • C]. The observed range in H 2 O 2 values in acidic geothermal systems is higher than previously observed in a limited set of thermal systems supporting phototrophic activity (<300 nM; Wilson et al, 2000a), and fall within values observed in rainwater (∼6 µM; King et al, 2007), freshwater (∼300 nM; King et al, 2007) or coastal waters (50-150 nM; Miller et al, 2005), but are considerably higher than values in the open ocean (∼0.7 nM; King et al, 2007). The Fe-oxide mat systems sampled in the current study do not contain phototrophic organisms, although small increases in DO during peak photon flux may in part, be due to inputs from adjacent phototrophic systems.…”

Section: Discussionmentioning

confidence: 64%

“…A flow-injection analysis instrument [FeLume(II)] with chemiluminescence (CL) detection (Waterville Analytical, Waterville, ME) was used in the field for the determination of H 2 O 2 concentrations in geothermal waters as described in prior reports (Miller et al, 2005;King et al, 2007). The CL detector was a Hamamatsu HC-135 photon counting PMT (Hamamatsu Corp., Bridgewater NJ) operated at the manufacturer's recommended voltage (700 V) for optimal signal/noise ratio for µM concentrations of hydrogen peroxide to avoid PMT saturation.…”

Section: Aqueous Geochemistry Of Geothermal Springsmentioning

confidence: 99%

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Hydrogen Peroxide Cycling in High-Temperature Acidic Geothermal Springs and Potential Implications for Oxidative Stress Response

et al. 2017

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Hydrogen peroxide (H 2 O 2 ), superoxide (O •−2 ), and hydroxyl radicals (OH • ) are produced in natural waters via ultraviolet (UV) light-induced reactions between dissolved oxygen (O 2 ) and organic carbon, and further reaction of H 2 O 2 and Fe(II) (i.e., Fenton chemistry). The temporal and spatial dynamics of H 2 O 2 and other dissolved compounds [Fe(II), Fe(III), H 2 S, O 2 ] were measured during a diel cycle (dark/light) in surface waters of three acidic geothermal springs (Beowulf Spring, One Hundred Springs Plain, and Echinus Geyser Spring; pH = 3-3.5, T = 68-80 • C) in Norris Geyser Basin, Yellowstone National Park. In situ analyses showed that H 2 O 2 concentrations were lowest (ca. 1 µM) in geothermal source waters containing high dissolved sulfide (and where oxygen was below detection) and increased by 2-fold (ca. 2-3 µM) in oxygenated waters corresponding to Fe(III)-oxide mat formation down the water channel. Small increases in dissolved oxygen and H 2 O 2 were observed during peak photon flux, but not consistently across all springs sampled. Iron-oxide microbial mats were sampled for molecular analysis of ROS gene expression in two primary autotrophs of acidic Fe(III)-oxide mat ecosystems: Metallosphaera yellowstonensis (Archaea) and Hydrogenobaculum sp. (Bacteria). Expression (RT-qPCR) assays of specific stress-response genes (e.g., superoxide dismutase, peroxidases) of the primary autotrophs were used to evaluate possible changes in transcription across temporal, spatial, and/or seasonal samples. Data presented here documented the presence of H 2 O 2 and general correlation with dissolved oxygen. Moreover, two dominant microbial populations expressed ROS response genes throughout the day, but showed less expression of key genes during peak sunlight. Oxidative stress response genes (especially external peroxidases) were highly-expressed in microorganisms within Fe(III)-oxide mat communities, suggesting a significant role for these proteins during survival and growth in situ.

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Section: Discussionmentioning

confidence: 64%

Section: Aqueous Geochemistry Of Geothermal Springsmentioning

confidence: 99%

Hydrogen Peroxide Cycling in High-Temperature Acidic Geothermal Springs and Potential Implications for Oxidative Stress Response

et al. 2017

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“…catenatum . By contrast, in coastal waters, phytoplankton cells are commonly exposed to H 2 O 2 concentrations below 1 μ m , which apparently does not limit chain length, a common trait in G . catenatum from where it derives its name.…”

Section: Discussionmentioning

confidence: 97%

Resistance to Hydrogen Peroxide Highlights Gymnodinium catenatum (Dinophyceae) Sensitivity to Geomagnetic Activity

Vale

2017

Photochem & Photobiology

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The chain-forming dinoflagellate Gymnodinium catenatum was exposed to hydrogen peroxide. Microscopical examination revealed striking dose-response alterations in chain formation above 245 lM: singlets replaced the dominance of long chain formations. These observations were valid for cells acclimated to halogen light. Under fluorescent light, cells were more resistant to modifications in chain length after H 2 O 2 exposure. Growth along 9 h in the presence of extracellular H 2 O 2 followed an hormesis response in both light regimes. Under halogen light conditions, alterations in chain formation and net growth were related to culture time, inocula concentration and geomagnetic activity (GMA) in the proceeding hours. Below a 16 nT threshold in GMA average growth was 0%, while above 16 nT it was circa +9%, independently if the local static magnetic field was altered by a permanent magnet or not. Mycosporine-like amino acids that can have an antioxidant role and are easily oxidized decreased from 7.1 to 6.5 pg cell À1 (P < 0.05) under halogen light and exposure to 245 lM H 2 O 2 . GMA, as well as UV-A, increased stress responsiveness that can momentarily protect cells from extracellular H 2 O 2 addition. However, stress response is dependent on bio-availability of several micronutrients and macronutrients, many found at limiting concentrations in oceanic waters.

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“…FIA analysis of H2O2 relies on a few chemiluminescent reactions, where the two most frequently used reactions in the literature are (1) acridinium ester (10-methyl-9-(p-formylphenyl)-acridinium carboxylate trifluoromethanesulfonate) [127][128][129][130][131] and (2) luminol and a Co(II) catalyst [132][133][134][135][136]. Less frequently used reactions involve (3) TCPO (bis-(2,4,6-trichlorophenyl)oxalate) [110] or (4) the oxidation of phenol [137].…”

Section: Flow Injection Analysismentioning

confidence: 99%

Possibilities and Challenges for Quantitative Optical Sensing of Hydrogen Peroxide

2017

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Abstract:Hydrogen peroxide (H 2 O 2 ) plays a key role in many biological processes spanning from coral bleaching, over cell signaling to aging. However, exact quantitative assessments of concentrations and dynamics of H 2 O 2 remain challenging due to methodological limitationsespecially at very low (sub µM) concentrations. Most published optical detection schemes for H 2 O 2 suffer from irreversibility, cross sensitivity to other analytes such as other reactive oxygen species (ROS) or pH, instability, temperature dependency or limitation to a specific medium. We review optical detection schemes for H 2 O 2 , compare their specific advantages and disadvantages, and discuss current challenges and new approaches for quantitative optical H 2 O 2 detection, with a special focus on luminescence-based measurements. We also review published concentration ranges for H 2 O 2 in natural habitats, and physiological concentrations in different biological samples to provide guidelines for future experiments and sensor development in biomedical and environmental science.

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Hydrogen peroxide method intercomparision study in seawater

Cited by 52 publications

References 18 publications

Hydrogen Peroxide Cycling in High-Temperature Acidic Geothermal Springs and Potential Implications for Oxidative Stress Response

Hydrogen Peroxide Cycling in High-Temperature Acidic Geothermal Springs and Potential Implications for Oxidative Stress Response

Resistance to Hydrogen Peroxide Highlights Gymnodinium catenatum (Dinophyceae) Sensitivity to Geomagnetic Activity

Possibilities and Challenges for Quantitative Optical Sensing of Hydrogen Peroxide

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