Mercury in the Environment Articles

235 Results found
  • Category: Health & Safety ×

  • Subcategory: Mercury in the Environment ×

Increase Mercury Vapor Detection Range by 10X

by Arizona Instrument LLC  (Jan. 25, 2016)

Vapor dilution module extends detection range of J505 from nanograms to milligrams How it works: The new 10:1 dilution module for the J505 reduces the concentration of mercury vapor in the sample stream by a factor of ten, allowing for a much higher detection limit. Rather than the standard upper detection limit of 500 µg/m3, ...

Mercury correlations among blood, muscle, and hair of northern elephant seals during the breeding and molting fasts

by John Wiley & Sons, Ltd.  (Jan. 12, 2016)

Mercury (Hg) biomonitoring and toxicological risk assessments for marine mammals commonly sample different tissues, making comparisons to toxicity benchmarks and among species and regions difficult. Few studies have examined how life history events, such as fasting, influence the relationship between total Hg (THg) concentrations in different ...

Organ‐specific accumulation, transportation and elimination of methylmercury and inorganic mercury in a low Hg accumulating fish

by John Wiley & Sons, Ltd.  (Jan. 12, 2016)

Low Hg concentrations down to several ng Hg per g wet tissue are documented in certain fish species such as herbivorous fish, and the underlying mechanisms remain speculative. In the present study, bioaccumulation and depuration patterns of inorganic Hg(II) and methylmercury (MeHg) in a herbivorous rabbitfish Siganus canaliculatus were ...

Disparity between state fish consumption advisory systems for methylmercury and US Environmental Protection Agency recommendations: A case study of the south central United States

by John Wiley & Sons, Ltd.  (Nov. 25, 2015)

Fish consumption advisories are used to inform citizens in the United States about noncommercial game fish with hazardous levels of methylmercury (MeHg). The US Environmental Protection Agency (USEPA) suggests issuing a fish consumption advisory when concentrations of MeHg in fish exceed a human health screening value of 300 ng/g. However, ...

Seasonal and flow‐driven dynamics of particulate and dissolved mercury and methylmercury in a stream impacted by an industrial mercury source

by John Wiley & Sons, Ltd.  (Nov. 18, 2015)

Sediments and floodplain soils in the East Fork Poplar Creek (EFPC) watershed in Oak Ridge, TN, are contaminated with high levels of mercury (Hg) from an industrial source at the headwaters. While baseflow conditions have been monitored, concentrations of Hg and methylmercury (MeHg) during high‐flow storm events, when the stream is more ...

Acute embryotoxic effects but no long term reproductive effects of in ovo methylmercury exposure in zebra finches (Taeniopygia guttata)

by John Wiley & Sons, Ltd.  (Nov. 17, 2015)

Mercury bioaccumulates in terrestrial ecosystems as methylmercury (MeHg), yet little is known about its effects on terrestrial organisms including songbirds. Here we used a model songbird species, the zebra finch (Taeniopygia guttata), to assess short‐term embryotoxic effects of in ovo MeHg exposure on hatching success and post‐hatching growth ...

Coal phase out case study: What Alberta can learn from Washington State

by Green Energy Futures  (Nov. 16, 2015)

How Bruce Nilles and the Sierra Club cleaned up Washington state Renewable energy made up half of all the new power plantsconstructed in the world in 2014. That’s an incredible number made all the better when you think of what these plants are ...

Egg laying sequence influences egg mercury concentrations and egg size in three bird species: Implications for contaminant monitoring programs

by John Wiley & Sons, Ltd.  (Oct. 27, 2015)

Bird eggs are commonly used in contaminant monitoring programs and toxicological risk assessments, but intra‐clutch variation and sampling methodology could influence interpretability. We examined the influence of egg laying sequence on egg mercury concentrations and burdens in American avocets, black‐necked stilts, and Forster's terns. The ...

Mercury concentrations in different tissues of turtle and caiman species from the Rio Purus, Amazonas, Brazil

by John Wiley & Sons, Ltd.  (Sep. 20, 2015)

Total mercury (Hg) concentrations of muscle, liver, blood, and epidermal keratin were measured in typically consumed, economically and culturally important species of turtle (Podocnemis unifilis and Podocnemis expansa) and caiman (Melanosuchus niger and Caiman crocodilus) from the Rio Purus in the Amazon basin, Brazil. Methylmercury (MeHg) ...

What specification thermometers are available, and what are the differences?

by Camlab Limited  (Sep. 16, 2015)

Thermometers are used in most laboratories across all industries, and a wide range are available to suit any temperature monitoring task. For high accuracy applications that need to adhere to international standards, traditional glass specification thermometers are still the most popular choice. Specification thermometers are those which are ...

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