Related Topics: Homeland Security Research

Homeland Security Research Products in the Science Inventory

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Records with

  • Organization = ORD-NHSRC,
  • Keyword = 'Standardized Analytical Methods' OR 'Selected Analytical Methods' OR SAM OR 'analytical methods'.
Records 1 to 25 of 1405

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2020
A review of measurements of air-surface exchange of reactive nitrogen in natural ecosystems across North America (JOURNAL)
Our review of existing North American flux datasets points to several data and knowledge gaps related to air-surface exchange processes that must be addressed to advance model algorithms. For example, recent studies of particulate (NO3-) and gas phase (NOx, HONO, peroxy nitrates...
Development of methods for measuring total microcystins in Fish Tissue using the 2-methoxy-3-methyl-4-phenylbutyric acid (MMPB) procedure (Region 8 webinar) (PRESENTATION)
There are limited methods for the analyses of multiple algal toxins in aquatic food webs, phytoplankton, zooplankton, periphyton, macroinvertebrates, forage fish, bottom feeders and top carnivore fish. Algal toxins in freshwater systems do not necessarily occur as single contamin...
Dry Deposition of Ozone Over Land: Processes, Measurement, and Modeling (JOURNAL)
Dry deposition of ozone is an important sink of ozone in near surface air. When dry deposition occurs through plant stomata, ozone can injure the plant, altering water and carbon cycling and reducing crop yields. Quantifying both stomatal and nonstomatal uptake accurately is rele...
Identification and occurrence of novel cyclic and polymeric perfluoroalkyl ethers (PFECAs) downstream of the fluoropolymer manufacturing plants (PRESENTATION)
The ban on perfluorooctanoic acid (PFOA) led to the production and use of alternative fluorinated compounds used as processing aids in the manufacture of fluoropolymers [1-2]. During the transition, most of the producers developed their own alternatives. Among the well-known repl...
Overview of AQMEII Phase 4: A Multi-Pronged Approach to Intercomparing and Evaluating Modeled Deposition (PRESENTATION)
This presentation provides an overview of work planned under Phase 4 of the Air Quality Model Evaluation International Initiative (AQMEII). Since its inception in 2009, AQMEII has brought together a total of 37 modeling groups from 17 countries in North America and Europe to cond...
Preview of a joint EPA-USFS General Technical Report on vulnerability of species N and S deposition: Vol. 3 Herbs (PRESENTATION)
The presentation summarizes the vulnerability of herb species to N and S deposition, and the ecosystem services potentially at risk, drawing from a variety of data sources, including primarily Clark et al. (2019) and the USFS Fire Effects Information System (FEIS) database,
US EPA’s Science-Based Approach to Understanding and Managing Environmental Risk from PFAS - Arkansas (PRESENTATION)
This presentation will cover the research being conducted on per- and polyfluoroalkyl substances (PFAS) by EPA's Office of Research and Development. Specific areas to cover are analytical methods, health effects, exposure, ecological toxicity, drinking water treatment, remediati...
Zero or not? Causes and consequences of zero‐flow stream gage readings (JOURNAL)
Streamflow observations can be used to understand, predict, and contextualize hydrologic, ecological, and biogeochemical processes and conditions in streams. Stream gages are point measurements along rivers where streamflow is measured, and are often used to infer upstream waters...
2019
A Comprehensive Review: Development of Electrochemical Biosensors for Detection of Cyanotoxins in Freshwater (JOURNAL)
Cyanobacteria harmful algal blooms are increasing in frequency and cyanotoxins have become an environmental and public concern in the U.S. and worldwide. In this Review, the majority of reported studies and developments of electrochemical affinity biosensors for cyanotoxins are c...
A disposable acetylcholine esterase sensor for As(iii) determination in groundwater matrix based on 4-acetoxyphenol hydrolysis (JOURNAL)
There is a lack of field compatible analytical methods for the speciation of As(III) to characterize groundwater pollution at anthropogenic sites. To address this issue, an inhibition-based acetylcholine esterase (AchE) sensor was developed to determine As(III) in groundwater. 4-...
ADEPT: Alternatives for Disposition of Electronics Planning Tool User Guide (PUBLISHED REPORT)
The Alternative Disposition of Electronics Planning Tool (ADEPT) provides stakeholders with an improved understanding of the generation of used electronics from consumer markets to the waste stream over time; however, ADEPT is based on a variety of assumptions and should not be u...
AQMEII 4 Deposition: Detailing the Ongoing Fourth Phase of the Air Quality Model Evaluation International Initiative (PRESENTATION)
The Air Quality Model Evaluation International Initiative (AQMEII) has entered its fourth phase of activities. The focus of this phase will be on deposition, a key process in any air quality modelling, and especially in regional scale models. Since deposition determines the remov...
Accessing Information for Per- & Polyfluoroalkyl Substances (PFAS) using the US EPA CompTox Chemicals Dashboard (PRESENTATION)
EPA’s National Center for Computational Toxicology is developing automated workflows for curating large databases within the DSSTox project, and providing accurate linkages of data to chemical structures, exposure and hazard information. The data are made available via the EPA’s...
Characterization of Recycled Tire Crumb Rubber Used on Synthetic Turf Fields in the United States (PRESENTATION)
Crumb rubber from recycled tires is widely used as an infill material in synthetic turf fields which has raised issues concerning potential exposures. However, recycled tire crumb rubber is a complex material which presents challenges when evaluating potential exposures (i.e., wh...
Cheminformatics and non-targeted analysis: A two-way street (PRESENTATION)
NTA methods are considered a qualitative analysis type, forgoing chemical standards (often because they are not available), and producing semi-quantitative concentration data using surrogate calibration techniques. Data collection for NTA experiments focuses on being as inclusive...
Cheminformatics approaches to support chemical identification delivered via the EPA CompTox Chemicals Dashboard (PRESENTATION)
The identification of chemicals in environment media depends on the application of analytical methods, the primary approach being one of the multiple mass spectrometry techniques. Cheminformatics solutions are critical to supporting the chemical identification process. This inclu...
Development of methods for measuring total microcystins in Fish Tissue using the 2-methoxy-3-methyl-4-phenylbutyric acid (MMPB) procedure - Toronto, Canada (PRESENTATION)
There are limited methods for the analyses of multiple algal toxins in aquatic food webs, phytoplankton, zooplankton, periphyton, macroinvertebrates, forage fish, bottom feeders and top carnivore fish. Algal toxins in freshwater systems do not necessarily occur as single contami...
EPA Method Development Update: Per- and Polyfluoroalkyl Substances (PFAS) (Orlando Florida) (PRESENTATION)
Background/Objectives. Poly and perfluorinated Alkyl Substances (PFAS) are increasingly measured at sites where aqueous film forming foams (AFFF) were used in fire suppression systems, fire training activities, and responding to crashes. AFFF products contain a variety of chemica...
EPA Method Development Update: Per- and Polyfluoroalkyl Substances (PFAS) (Seattle Washington) (PRESENTATION)
Background/Objectives. Poly and perfluorinated Alkyl Substances (PFAS) are increasingly measured at sites where aqueous film forming foams (AFFF) were used in fire suppression systems, fire training activities, and responding to crashes. AFFF products contain a variety of chemica...
EPA Research to Support Source/Site Characterization and Cleanup - Lansing (PRESENTATION)
Per- and polyfluoroalkyl substances (PFAS) are a group of man-made chemicals found in a wide range of consumer products that are persistent in the environment and in the human body. These chemicals, which may lead to adverse human health effects, have been found in drinking water...
Efficacy of Inactivation of Human Enteroviruses by Dual-Wavelength germicidal ultraviolet (UV-C) light emitting diodes (LEDs) (JOURNAL)
This research utilized a germicidal ultraviolet (UV-C) light emitting diodes (LEDs) device emitting a polychromatic light spectrum around the peak at 260 nm and 280 nm to evaluate its efficacy at inactivating human enteroviruses in water. The combination of 260|280 nm together wa...
Environmental fate of multiwalled carbon nanotubes and graphene oxide across different aquatic ecosystems (JOURNAL)
The industrial use and widespread application of carbon-based nanomaterials have caused a rapid increase in their production over the last decades. However, toxicity of these materials is not fully known and still being investigated for potential human and ecological health risks...
Evaluation and Intercomparison of Modeled Atmospheric Deposition over North America and Europe – An Overview of Phase 4 of the Air Quality Model Evaluation International Initiative. (PRESENTATION)
This poster will present an overview of work planned under Phase 4 of the Air Quality Model Evaluation International Initiative (AQMEII). Since its inception in 2009, AQMEII has brought together a total of 37 modeling groups from 17 countries in North America and Europe to conduc...
Evaluation of Analytical Methods for the Detection Of Bacillus Anthracis Spores: Compatibility with Real-World Samples Collected from Outdoor and Subway Surfaces (PUBLISHED REPORT)
This effort sought to assess the impact of potential real-world interferents (RWIs) present in Sponge-Stick and Vacuum Cassettes (VCF) samples on current culture and molecular analysis methods. Having an assessment of the impact, if any, will help EPA understand limitations of th...
Evaluation of Analytical Methods for the Detection of Bacillus anthracis spores: Compatibility with Real-World Samples Collected from Outdoor and Subway Surfaces (PRESENTATION)
Culture- and RV-PCR-based methods were rendered on surface samples collected from NYC subways and above-ground locations spiked with Bacillus anthracis spores. The results demonstrate the utility and limitations of the two methods when challenged with 'real world' sample matrices...
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