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    Records 26 to 50 of 83855

    A landscape assessment and associated dataset of stream confluences for the conterminous U.S.
    (JOURNAL) [Published : Apr 01, 2021]
    Abstract Stream confluences are important components of fluvial networks. Hydraulic forces meeting at stream confluences often produce changes in streambed morphology and sediment distribution, and these changes often increase habitat heterogeneity relative to upstream and downst...
    A mixture of 15 phthalates and pesticides below individual chemical No Observed Adverse Effect Levels (NOAELs) produces reproductive tract malformations in the male rat
    (JOURNAL) [To be published : Nov 01, 2021]
    Humans carry residues of multiple synthetic chemicals at any given point in time. Research has demonstrated that compounds with varying molecular initiating events (MIE) that disrupt common key events can act in concert to produce cumulative adverse effects. Congenital defects of...
    A new approach for health-oriented ozone control strategy: Adjoint-based optimization of NOx emission reductions using metaheuristic algorithms
    (JOURNAL) [To be published : Aug 20, 2021]
    While levels of particulate matters in the Pearl River Delta Region (PRD) show a significant reduction, ozone (O3) has an opposite increasing trend, becoming the critical air quality target in this decade. Emission control strategies are typically formulated sector by s...
    A quantitative structure-activity relationship (QSAR) model to estimate serum half-lives of per- and polyfluoroalkyl substances (PFAS) in multiple species (SOT 2021)
    (PRESENTATION) [Presented : Mar 26, 2021]
    Perfluoroalkyl substances (PFAS) are a diverse group of man-made chemicals that are commonly found in body tissues. Thus, an important part of risk prioritization and assessment of these compounds is modeling their toxicokinetics. However, in vivo assays of PFAS’s have demo...
    A quest to identify suitable organic tracers for estimating children’s dust ingestion rates
    (JOURNAL) [Published : Feb 01, 2021]
    Chemical exposure via dust ingestion is of great interest to researchers and regulators because children are exposed to dust through their daily activities, and as a result, to the many chemicals contained within dust. Our goal was to develop a workflow to identify and rank organ...
    A review of current United States geospatial datasets and mapping approaches for headwater stream networks
    (PRESENTATION) [Presented : May 27, 2021]
    Headwater streams provide essential functions in supporting healthy watersheds, yet headwaters are often under- and/or misrepresented in mapping due to cartographic or sensor constraints and dynamic flows. There is also ambiguity regarding the availability of mapped datasets in t...
    A short history of methods used to measure bathing beach water quality
    (JOURNAL) [Published : Feb 01, 2021]
    The enumeration of fecal indicators of bathing beach water to determine quality have been used since the mid-20th century. In the 1930s and as late the 1970s, the Most Probable Number procedure for estimating microbial densities in water was in general use. The most probable numb...
    A strategy for power generation from bilgewater using a photosynthetic microalgal fuel cell (MAFC)
    (JOURNAL) [Published : Feb 01, 2021]
    Microbial fuel cells (MFCs) have recently advanced towards a new initiative of electricity generation from oily wastewater. Although MFCs that utilize microalgae as a self-supporting oxygen (O2) supply at the cathode have been well discussed, microalgae at the anode as an active ...
    A systematic scoping review of the methodological approaches and effects of pesticide exposure on solitary bees
    (JOURNAL) [Published : May 14, 2021]
    Background: Pollination services provided by solitary bees, the largest group of bees worldwide, are critical to the vitality of ecosystems and agricultural systems alike. Disconcertingly, bee populations are in decline and while no single causative factor has been identified, pe...
    A systems perspective on sustainable energy transitions
    (PRESENTATION) [Presented : Jun 04, 2021]
    This presentation will discuss energy system modeling approaches as well as life cycle assessment tools for understanding the sustainability of energy pathways. Energy system modeling captures the full system from all primary energy resources to end-use demands in the buildings, ...
    A vision for the role of bioinformatics in species extrapolation for chemical safety
    (PRESENTATION) [Presented : Apr 30, 2021]
    Modernization of chemical safety evaluations with more efficient and rapid, yet scientifically sound, approaches to protect human and ecological health are necessary to keep pace with the development of new chemicals. Historically and with the advent of high-throughput approaches...
    A-E BOSC Meet the Scientist Session: EQUATES: EPA’s Air QUAlity TimE Series Project
    (PRESENTATION) [Presented : Feb 17, 2021]
    The Community Multiscale Air Quality modeling system (CMAQ; estimates atmospheric concentrations and deposition for numerous chemicals, including ozone, PM2.5 and its constituents, and deposition of important nitrogen and sulfur species. CMAQ concentrat...
    AAPCA Meeting: Characterizing the Atmospheric Transport and Deposition of PFAS Emissions from a Manufacturer near Fayetteville, NC
    (PRESENTATION) [Presented : Feb 09, 2021]
    Per- and polyfluoroalkyl substances (PFASs) have been released into the environment for decades, yet contributions of air emissions to total human exposure, from inhalation and drinking water contamination via deposition, are poorly constrained. The atmospheric transport and fate...
    (PRESENTATION) [Presented : Feb 05, 2021]
    Discussion of revised read-across methodology for PPRTVs and the expansion of read-across applications to support HERA products.
    AE BOSC Meeting: Meet the Scientists, CPHEA-PHITD-PHESD New Frontiers on the Health Impacts of Air Pollution
    (PRESENTATION) [Presented : Feb 17, 2021]
    Meet the Scientists, Center for Public Health and Environmental Assessment (CPHEA) PHITD and PHESD New Frontiers on the Health Impacts of Air Pollution: Dr. Cavin Ward-Caviness CPHEA, Public Health and Integrated Toxicology Division (PHITD), Clinical Research Branch Environmental...
    (PRESENTATION) [Presented : Feb 05, 2021]
    Discussion of the strategy and implementation for integrating NAMs into HERA assessment products, increasing scientific confidence and reliability on NAMs
    Accumulation and Release of Arsenic from Cast Iron: Impact of Initial Arsenic and Orthophosphate Concentrations
    (JOURNAL) [Published : Apr 15, 2021]
    Various iron oxide and oxyhydroxide minerals commonly found in old cast iron pipe scale were shown to exhibit high and similar affinity for arsenate [As(V)] and orthophosphate (PO4) via adsorption, co-precipitation, and other factors. PO4 addition is a common corrosion control tr...
    Activation of inorganic peroxides with magnetic graphene for the removal of antibiotics from wastewater
    (JOURNAL) [Published : Apr 01, 2021]
    Magnetic graphene catalysts were prepared for the removal of antibiotics (sulfamethoxazole, norfloxacin, tetracycline and flumequine) in wastewater. Different proportions of magnetite-graphene from 1:0 to 0:1 were considered to study the catalytic activation of inorganic peroxide...
    Adaptation of World Wide Lightning Location Network Observations for Lightning Assimilation and Lightning NO in the WRF-CMAQ Modeling System
    (PRESENTATION) [Presented : Jan 14, 2021]
    In the Weather Research and Forecasting (WRF) and Community Multiscale Air Qualtiy (CMAQ) modeling system for air quality predictions, observed lightning flash information can be assimilated to reduce errors associated with convective rainfall and other convection-related meteoro...
    Addition of phenylmethylsulfonyl fluoride (PMSF) substantially increases the working lifetime of the trout liver S9 substrate depletion assay resulting in improved detection of low intrinsic clearance rates
    (JOURNAL) [Published : Jan 01, 2021]
    The performance of a trout liver S9 substrate depletion assay was evaluated following the addition of phenylmethylsulfonyl fluoride (PMSF) or a general-purpose protease inhibitor cocktail to liver homogenization buffers and/or the S9 reaction mixture. Addition of PMSF to liver h...
    Adrenergic and Glucocorticoid Receptors in Pulmonary Health Effects of Air Pollution
    (JOURNAL) [Published : Jun 04, 2021]
    Abstract: Adrenergic receptors (ARs) and glucocorticoid receptors (GRs) are activated by circulating catecholamines and glucocorticoids, respectively. These receptors regulate the homeostasis of physiological processes with specificity via multiple receptor subtypes, wide tissue-...
    Advancement of Flow Permanence Prediction in Headwater Systems Using Semi-Distributed Hydrologic Modeling
    (PRESENTATION) [Presented : May 27, 2021]
    Headwater streams comprise large portions of river networks and provide vital ecosystem functions. Yet these systems are less monitored and more prone to disturbance compared to larger order waterways. Further, while streamflow permanence in headwater systems is poorly understood...
    Advancement of Flow Permanence Prediction in Headwater Systems Using Semi-Distributed Hydrologic Modeling (2021 SFWS)
    (PRESENTATION) [Presented : May 27, 2021]
    Headwater streams comprise large portions of river networks and provide vital ecosystem functions. Yet these systems are less monitored and more prone to disturbance compared to larger order waterways. Further, while streamflow permanence in headwater systems is poorly understood...
    Advances in Chemical Risk Assessment
    (PRESENTATION) [Presented : Mar 05, 2021]
    Traditionally, risk assessment for environmental chemicals is based upon epidemiological and/or animal toxicity data. Since the release of the National Academy of Sciences Toxicity in the 21st Century: A Vision and a Strategy (2007) and Science and Decisions: Advancing Risk Asses...
    Advancing Application of NAMs and Evidence Integration in Risk Assessment: Dosimetry is Critical to Exposure Alignment
    (PRESENTATION) [Presented : Jun 02, 2021]
    Conceptual constructs for source-to-outcome modeling based on aggregate exposure pathway (AEP) and adverse outcome pathway (AOP) frameworks can provide a mechanistic scaffold for evidence integration and application of novel approach methods (NAMs).  Dosimetry is the critica...