John R. Helms, Ph.D.
Affiliations: | 2012 | Chemistry and Biochemistry | Old Dominion University, Norfolk, VA, United States |
Area:
Analytical Chemistry, Biogeochemistry, Chemical OceanographyGoogle:
"John Helms"Mean distance: (not calculated yet)
Parents
Sign in to add mentor| Jingdong Mao | grad student | 2012 | Old Dominion University | |
| (Spectroscopic characterization of dissolved organic matter: Insights into composition, photochemical transformation and carbon cycling.) | ||||
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Publications
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| Cao X, Mulholland MR, Helms JR, et al. (2017) A Major Step in Opening the Black Box of High-Molecular-Weight Dissolved Organic Nitrogen by Isotopic Labeling of Synechococcus and Multibond Two-Dimensional NMR. Analytical Chemistry |
| Mead RN, Probst EE, Helms JR, et al. (2014) Enhanced detection of the algal toxin PbTx-2 in marine waters by atmospheric pressure chemical ionization mass spectrometry. Rapid Communications in Mass Spectrometry : Rcm. 28: 2455-60 |
| Mead RN, Barefoot S, Helms JR, et al. (2014) Photodegradation of the antihistamine cetirizine in natural waters. Environmental Toxicology and Chemistry / Setac. 33: 2240-5 |
| Helms JR, Glinski DA, Mead RN, et al. (2014) Photochemical dissolution of organic matter from resuspended sediments: Impact of source and diagenetic state on photorelease Organic Geochemistry. 73: 83-89 |
| Helms JR, Mao J, Chen H, et al. (2014) Spectroscopic characterization of oceanic dissolved organic matter isolated by reverse osmosis coupled with electrodialysis Marine Chemistry |
| Chen H, Stubbins A, Perdue EM, et al. (2014) Ultrahigh resolution mass spectrometric differentiation of dissolved organic matter isolated by coupled reverse osmosis-electrodialysis from various major oceanic water masses Marine Chemistry. 164: 48-59 |
| Dixon JL, Helms JR, Kieber RJ, et al. (2014) Biogeochemical alteration of dissolved organic material in the Cape Fear River Estuary as a function of freshwater discharge Estuarine, Coastal and Shelf Science. 149: 273-282 |
| Helms JR, Mao J, Stubbins A, et al. (2014) Loss of optical and molecular indicators of terrigenous dissolved organic matter during long-term photobleaching Aquatic Sciences. 76: 353-373 |
| Helms JR, Stubbins A, Perdue EM, et al. (2013) Photochemical bleaching of oceanic dissolved organic matter and its effect on absorption spectral slope and fluorescence Marine Chemistry. 155: 81-91 |
| Helms JR, Mao J, Schmidt-Rohr K, et al. (2013) Photochemical flocculation of terrestrial dissolved organic matter and iron Geochimica Et Cosmochimica Acta. 121: 398-413 |