Biomonitoring Articles

113 Results found
  • Category: Monitoring & Testing ×

  • Subcategory: Biomonitoring ×

Measurement of a Doubly Substituted Methane Isotopologue, 13CH3D

by Aerodyne Research, Inc.  (Oct. 14, 2014)

ABSTRACT: Methane is an important energy resource and significant long-lived greenhouse gas. Carbon and hydrogen isotope ratios have been used to better constrain the sources of methane but interpretations based on these two parameters alone can often be inconclusive. The precise measurement of a doubly substituted methane isotopologue, 13CH3D, is ...

Environmental Sensing and Monitoring Market Global Research 2018

by ReportsnReports  (Sep. 27, 2014)

Environmental sensors are devices that detect the changes that take place in the environment such as change in humidity and temperature. Rapid population growth, industrialization, and agricultural activities have led to the deterioration of air, soil, and water quality levels over the decades, thereby affecting the biological life and ...

Comparative effects of biological and chemical dispersants on the bioavailability and toxicity of crude oil to early life stages of marine medaka (Oryzias melastigma)

by John Wiley & Sons, Ltd.  (Aug. 12, 2014)

We assessed the bioavailability and chronic toxicity of water‐accommodated fractions of crude oil (WAFs) and two dispersants plus dispersed crude oil (chemical dispersant + crude oil, CE‐WAF, and biological dispersant + crude oil, BE‐WAF) on the early life stages of marine medaka, Oryzias melastigma. Results showed that the addition of the two ...

Methylated phenanthrenes are more potent than phenanthrene in a bioassay of human aryl hydrocarbon receptor (AhR) signaling

by John Wiley & Sons, Ltd.  (Jul. 16, 2014)

Alkylated polycyclic aromatic hydrocarbons (APAHs) are abundant in petroleum but data regarding their toxicological properties are limited. A survey of all monomethylated phenanthrene structures revealed that they were 2‐5 times more potent than phenanthrene for activation of human aryl hydrocarbon receptor in a yeast bioassay. Phenanthrenes ...

Performance and metabolic aspects of a novel enhanced biological phosphorus removal system with intermittent feeding and alternate aeration

by IWA Publishing  (Apr. 24, 2014)

A novel enhanced biological phosphorus removal (EBPR) system, which combined the intermittent feeding design with an anaerobic selector, was examined using on-line oxidation reduction potential (ORP), nitrate and ammonium probes. Two experimental periods were investigated: the aerobic and anoxic phases were set at 40 and 20 minutes respectively ...

An inexpensive, temporally‐integrated system for monitoring occurrence and biological effects of aquatic contaminants in the field

by John Wiley & Sons, Ltd.  (Mar. 26, 2014)

Assessment of potential risks of complex contaminant mixtures in the environment requires integrated chemical and biological approaches. Our laboratory is developing these types of methods for assessing possible risks of aquatic contaminants in near‐shore Great Lakes sites. A component of this involves an exposure system for caged fathead ...

Exploring ecotoxicological fish bioassay for the evaluation of uranium reprotoxicity

by John Wiley & Sons, Ltd.  (Mar. 21, 2014)

Although reproduction in fish is known to be sensitive to metal exposure, few ecotoxicological studies have focused on the toxicological effects of metals on reproduction in fish. Because uranium (U) is naturally present in aquatic ecosystems (0.6–2 mg/L), freshwater organisms are subjected to chronic U exposure. Although new standardised ...

Efficiency of peracetic acid in inactivating bacteria, viruses, and spores in water determined with ATP bioluminescence, quantitative PCR, and culture-based methods

by IWA Publishing  (Mar. 19, 2014)

The disinfection efficiency of peracetic acid (PAA) was investigated on three microbial types using three different methods (filtration-based ATP (adenosine-triphosphate) bioluminescence, quantitative polymerase chain reaction (qPCR), culture-based method). Fecal indicator bacteria (Enterococcus faecium), virus indicator (male-specific ...

Incorporating potable water sources and use habits into surveys that improve surrogate exposure estimates for water contaminants: the case of bisphenol A

by IWA Publishing  (Mar. 19, 2014)

Human biomonitoring studies for water contaminants are often accompanied by surveys relying solely on total drinking water consumption rates, thus, failing to account for specific water sources (bottled and tap water) and use habits, such as water used for preparing cold/hot beverages (coffee, tea, juice, etc.). Despite the extensive use of ...

Comparison of Microcystis aeruginosa (PCC7820 and PCC7806) growth and intracellular microcystins content determined by liquid chromatography–mass spectrometry, enzyme-linked immunosorbent assay anti-Adda and phosphatase bioassay

by IWA Publishing  (Mar. 19, 2014)

Cyanobacteria are able to produce several metabolites that have toxic effects on humans and animals. Among these cyanotoxins, the hepatotoxic microcystins (MC) occur frequently. The intracellular MC content produced by two strains of Microcystis aeruginosa, PCC7806 and PCC7820, and its production kinetics during the culture time were studied in ...

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