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#1Khanghyun LeeH-Index: 9
#2Changhee HanH-Index: 3
Last.Sungmin HongH-Index: 31
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We report the first high-resolution record of arsenic (As) observed in Greenland snow and ice for the periods 1711–1970 and 2003–2009 AD. The results show well-defined large-scale atmospheric pollution by this toxic element in the northern hemisphere, beginning as early as the 18th century. The most striking feature is an abrupt, unprecedented enrichment factor (EF) peak in the late 1890s, with an ∼30-fold increase in the mean value above the Holocene natural level. Highly enriched As was eviden...
The potential risks of micro/nanoplastics on ecological environment, particularly aquatic fauna, have been realized in recent years. However, information about its potential effects on aquatic plants is scarce. In this study, a long-term exposure experiment was conducted to investigate the effects of polystyrene nanoplastics (PS-NPs, 0.16-100 μg/mL) on the early development of an endangered aquatic plant (Ceratopteris pteridoides). Fluorescent images demonstrated that PS-NPs were adsorbed and ac...
#1Derek J. PriceH-Index: 4
#2Douglas A. DayH-Index: 39
Last.Jose L. JimenezH-Index: 99
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The chemical composition of indoor air at the University of Colorado-Boulder art museum was measured by a suite of gas- and particle-phase instruments. Over 80% of the total observed organic carbon (TOOC) mass (100 μg m-3) consisted of reduced compounds (carbon oxidation state, OSC 7) and low carbon number (nC < 6). The museum TOOC was compared to other indoor and outdoor locations, which increased according to the following trend: remote < rural ≤ urban < indoor ≤ megacity. The museum TOOC was ...
High resolution mass spectrometry (HRMS) analyses provide expansive chemical characterizations of environmental samples. To date, most research efforts have developed tools to expedite labor- and time-intensive contaminant identification efforts. However, even without chemical identity, the richness of non-target HRMS datasets represents a significant opportunity to chemically differentiate samples and delineate source contributions. To develop this potential, we evaluated the use of unidentifie...
#1Wenqing TuH-Index: 5
#2Ruben Alcaraz Martínez (University of Barcelona)
Last.Jan A. MennigenH-Index: 15
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Due to the global ban on PFOS, the novel PFOS alternatives 6:2 chlorinated polyfluorinated ether sulfonate (F-53B) and sodium p-perfluorous nonenoxybenzene sulfonate (OBS) are emerging in the Chinese market, but little is known about their ecological risks. In this study, zebrafish embryos were exposed to PFOS, F-53B and OBS to evaluate their bioconcentration and acute metabolic consequences at the organismal and molecular level. Chemical analysis showed that per- and polyfluoroalkyl substances ...
It has been hypothesized that the cytotoxicity of secondary organic aerosols (SOA) is mediated through the formation of reactive oxygen species (ROS) in the exposed cells. Here, lung epithelial cells (A549) residing at the air-liquid interface were exposed to proxies of anthropogenic and biogenic SOA that were photochemically aged under varying nitrogen oxide (NOx) concentrations in an oxidation flow reactor (OFR). The total organic peroxides and ROS radical content in the SOA were quantified by...
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