Results 221 to 230 of about 10,511 (238)
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Laser-induced fluorescence of marine sedimentary interstitial dissolved organic matter
Marine Chemistry, 1994Fluorescence spectroscopy is investigated on dissolved organic matter (DOM) of marine sedimentary interstitial waters (IW). These were collected near urban outfalls and a river mouth in the Mediterranean, having a high interstitial dissolved organic carbon content (DOC).
C Benamou +5 more
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Fluorescence of nanoparticles of organic matter dissolved in natural water
Moscow University Physics Bulletin, 2007The fluorescence of nanoparticles of dissolved organic matter under 270-, 310-, and 355-nm excitation is studied for different molecular fractions. The fluorescence quantum yield of the colloidal (molecules of size 5–200 nm) and low-molecular-weight (molecules smaller than 5 nm) fractions are obtained.
A. S. Milyukov +4 more
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Characterization of Dissolved Organic Matter with Intermittent Aeration by Fluorescence
Analytical Letters, 2016ABSTRACTThis work characterized the fluorescence of dissolved organic matter in water under intermittent aeration and the correlation between the fluorescence and ammonia concentration. The fluorescence spectra allowed determination of proteins using two excitation wavelengths for tyrosine and tryptophan.
Hua Zhang +4 more
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Water Research, 2021
Recently, studies have increasingly focused on the occurrence of plastic leachate and its effects on aquatic environments. However, few studies have aimed to identify microplastic-derived dissolved organic matter (MP-DOM) from environmental samples that are often enriched with natural organic matter (NOM). In this study, three MP-DOM (EPS-DOM, PVC-DOM,
Yun Kyung, Lee, Seongjin, Hong, Jin, Hur
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Recently, studies have increasingly focused on the occurrence of plastic leachate and its effects on aquatic environments. However, few studies have aimed to identify microplastic-derived dissolved organic matter (MP-DOM) from environmental samples that are often enriched with natural organic matter (NOM). In this study, three MP-DOM (EPS-DOM, PVC-DOM,
Yun Kyung, Lee, Seongjin, Hong, Jin, Hur
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Environmental Science & Technology, 2020
Despite the numerous studies that have investigated the occurrence and fate of plastic particles in the environment, only a limited effort has been devoted toward exploring the characteristics of dissolved organic matter (DOM) leached from microplastics. In this study, using excitation emission matrix-parallel factor analysis (EEM-PARAFAC), we explored
Yun Kyung Lee +2 more
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Despite the numerous studies that have investigated the occurrence and fate of plastic particles in the environment, only a limited effort has been devoted toward exploring the characteristics of dissolved organic matter (DOM) leached from microplastics. In this study, using excitation emission matrix-parallel factor analysis (EEM-PARAFAC), we explored
Yun Kyung Lee +2 more
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Fluorescence‐based proxies for lignin in freshwater dissolved organic matter
Journal of Geophysical Research: Biogeosciences, 2009Lignin phenols have proven to be powerful biomarkers in environmental studies; however, the complexity of lignin analysis limits the number of samples and thus spatial and temporal resolution in any given study. In contrast, spectrophotometric characterization of dissolved organic matter (DOM) is rapid, noninvasive, relatively inexpensive, requires ...
Peter J. Hernes +3 more
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Bulletin of Environmental Contamination and Toxicology, 2011
The fluorescence excitation-emission matrix of Chromophoric dissolved organic matter (CDOM) samples from rainwater collected at Rameswaram, Tamilnadu, India are analysed. Total five peaks were observed for humic/marine and protein likes substances respectively.
P R, Salve +6 more
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The fluorescence excitation-emission matrix of Chromophoric dissolved organic matter (CDOM) samples from rainwater collected at Rameswaram, Tamilnadu, India are analysed. Total five peaks were observed for humic/marine and protein likes substances respectively.
P R, Salve +6 more
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Critical analysis of commonly used fluorescence metrics to characterize dissolved organic matter
Water Research, 2014The use of fluorescence spectroscopy for the analysis and characterization of dissolved organic matter (DOM) has gained widespread interest over the past decade, in part because of its ease of use and ability to provide bulk DOM chemical characteristics.
Julie A, Korak +3 more
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Environmental Microbiology, 2012
Summary Recent evidence suggests a key role of bacterioplankton in shaping the composition of the dissolved organic matter (DOM) pool in aquatic systems, not only through consumption but also through production of specific compounds, but the latter process is still not well understood.
François, Guillemette +1 more
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Summary Recent evidence suggests a key role of bacterioplankton in shaping the composition of the dissolved organic matter (DOM) pool in aquatic systems, not only through consumption but also through production of specific compounds, but the latter process is still not well understood.
François, Guillemette +1 more
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Influence of pH on the fluorescence of dissolved organic matter
Marine Chemistry, 1982Abstract During two surveys (June, 1980 and March, 1981) the influence of the pH on the fluorescence (mFl) was studied in the Ems-Dollart estuary. In the natural pH range (7–9) the fluorescence (mFl) increased by 16.4%. To express the fluorescence (mFl) at a fixed pH, a formula was derived (see eq. 1).
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