Environmental Testing Articles

The mEI, Chromocult® enterococci, and m-Enterococcus culture-based methods used to assess water quality by the detection of Enterococcus spp. were first compared in terms of sensitivity using (1) 41 different type strains of Enterococcus spp. and (2) environmental colonies identified by 16S rRNA sequencing. Then, two specific-rtPCR ...

Dec. 17, 2016

By IWA Publishing

ABSTRACT BOS 100 was successfully implemented as part of a combined remedies strategy to treat elevated levels of Trichloroethylene in a shallow fine grained aquifer at a former large industrial facility. CHALLENGES A large industrial facility used vapor degreasing in the 1970s and 1980s that resulted in chlorinated volatile organic compound (CVOC) ...

Dec. 16, 2016

By Remediation Products Incorporated (RPI)

Matrix Express LIMS allowed The Water Lab to improve its efficiency and provide a faster service by streamlining the processing and management of sample information. The Water Lab (www.lhewaterlab.ie/) is a modern, fully calibrated ISO17025 environmental contract laboratory based in Co. Kildare, Ireland. Providing a wide range of water and waste water testing services, including sampling and ...

Mar. 23, 2016

By Autoscribe Informatics

Real Time Traceability in Microbiology at Westward Laboratories Cornwall 'Quality is the Result" Automation and mechanisation are key requirements in high throughput environments such as analytical laboratories. The implementation of Autoscribe's Matrix LIMS at Westward Laboratories in Cornwall together with Kiestra Lab Automation (The Netherlands) systems demonstrates how such projects, can ...

Mar. 22, 2016

By Autoscribe Informatics

Normal ranges are some fraction of a reference distribution deemed to represent an expected condition (typically 95%). They are frequently used as the basis for generic criteria for monitoring programs designed to test whether a sample is outside of “normal”, as in reference condition approach studies. Normal ranges are also the basis for criteria for more classic environmental effects ...

Mar. 4, 2016

By John Wiley & Sons, Ltd.

Standard ecotoxicity tests are conducted under constant and favorable experimental conditions. In natural communities, however, the toxicity of chemicals may be influenced by abiotic and biotic environmental factors. Firstly, the authors examined the influence of temperature and total food concentration on the nature of the combined effects of copper (Cu) and the cyanobacterium Microcystis ...

Feb. 16, 2016

By John Wiley & Sons, Ltd.

Increasing activity of oil sands extraction and processing in northern Alberta is marked by ongoing controversy about the nature and extent of associated environmental impacts. Bitumen contains a mixture of toxic chemicals, including metals and residual polycyclic aromatic hydrocarbons (PAHs), whose release into the environment poses a distinct risk to the surrounding environment, plus ...

Jul. 3, 2015

By John Wiley & Sons, Ltd.

Environmental laboratories practice “applied analytical chemistry” by analyzing samples using a list of potential contaminants to determine how much, if any, of the contaminant is present. These contaminants, the methods used to analyze for them, and the maximum amount of contaminant allowed in the sample are defined by regulation. This paper provides an overview of ...

Apr. 3, 2015

By Shimadzu Scientific Instruments Inc

Cytogenetic testing is used for the diagnosis of many genetic disorders including congenital (prenatal and adult) and hematologic/oncologic disorders. Processing of these tests used to be labor-intensive with unpredictable test data. That’s why the Cytogenetic Laboratory at Mayo Clinic and Thermotron joined forces to increase the efficiency of cytogenetic test processing with the invention ...

Nov. 11, 2014

By Thermotron Industries

Consistency of optimum chromosome spreading during harvest of cytogenetic specimens remains a major concern. We have tested the idea that a precise control of the drying rate (the time with which metaphase cells dry), as fixed cell suspension is placed on a slide or an in situ culture in last fixation, may be the answer. Amniocyte and lymphocyte cultures were allowed to dry at defined ...

Sep. 20, 2014

By Thermotron Industries

Environmental factors are important in that they might interact with toxicants and could affect the concentration‐response relationship of the toxicants in the water environment. Microcystins (MCs) produced by algal blooming are natural toxins that exert severe impact on aquatic organisms. Despite the possibility of interaction effects between environmental factors and MCs, very few studies ...

Aug. 11, 2014

By John Wiley & Sons, Ltd.

As environmental responsibility increases, more testing is being required. However, more testing means more extraction using organic solvents. To keep extraction solvents from adding to the complexity of keeping air clean, recovering the extraction solvent has become more common. BUCHI has stepped up to the challenge and met the concerns with the Syncore® Analyst. In addition to solvent ...

Feb. 28, 2014

By BÜCHI Labortechnik AG

Our investigation centered around the aim of whether and how two environmental factors could influence the toxicity of a pyrethroid to two representatives of an important group of soil organisms. The impacts of different temperatures (20°C and 26°C) and soil moisture levels (30%, 50% and 70% of the water holding capacity) were investigated in combination with the insecticide lambda‐cyhalothrin ...

Nov. 28, 2013

By John Wiley & Sons, Ltd.

The current European legislation requires that combined effects of the active substances (a.s.) and any substance of concern contained in biocidal products are taken into account in the environmental risk assessment. The hypothesis whether the consideration of a.s. together with all formulation additives that are labelled as presenting an environmental hazard is sufficient for a reliable ...

Oct. 15, 2013

By John Wiley & Sons, Ltd.

Rivers, lakes and the sea were the natural receivers of raw urban waste and storm waters for a long time but the low sustainability of such practice, the increase of population and a renewed environmental sensibility increased researcher interest in the analysis and mitigation of the impact of urban waters on receiving water bodies (RWB). In Europe, the integrated modelling of drainage systems ...

Sep. 16, 2013

By IWA Publishing

Ceriodaphnia dubia were tested to evaluate the acute and chronic interactive effects of diphenhydramine and sertraline. Observed effects were compared to two reference toxicity models, the concentration addition model and the independent action model. Results indicate that the two drugs exhibit additive toxicity in C. dubia. In some cases, individually sublethal concentrations of the chemicals ...

Sep. 2, 2013

By John Wiley & Sons, Ltd.

We compared two spiking methods and evaluated nickel (Ni) partitioning during a series of toxicity tests with eight different freshwater sediments having a range of physico‐chemical characteristics. A two‐step spiking approach with immediate pH adjustment by addition of NaOH at a 2:1 molar ratio to the spiked Ni was effective in producing consistent pH and other chemical characteristics across ...

May 8, 2013

By John Wiley & Sons, Ltd.

This study intended to assess the influence of salinity on the effects of copper on two life‐stages of Pelophylax perezi. Single and combined effects of salinity (NaCl) and copper on survival, malformations, body length, and biochemical markers (catalase‐CAT, cholinesterases‐ChE, lactate dehidrogenase‐LDH, and glutathione S‐transferase‐GST) of individuals were evaluated in a multifactorial ...

Apr. 29, 2013

By John Wiley & Sons, Ltd.

Intelligent dataTaker System from CAS DataLoggers Water disruptions typically occur after a large amount of water has rapidly collected in a catchment area. As a result this water is subject to continual monitoring and testing for a variety of chemical and biological agents as well as clarity, rate of movement, and water levels for environmental management. Turbidity, conductivity, ...

Dec. 21, 2012

By CAS DATALOGGERS

Sodium dodecyl benzene sulfonate (SDBS) and cetyl trimethyl ammonium chloride (CTAC) are two kinds of surfactants widely applied in various industries. The tremendous direct discharge of these surfactants into natural waters has posed a significant threat to ecosystems. Dunaliella bardawil was employed in the present research to test the toxic effects of SDBS, CTAC, and their mixture on cell ...

Nov. 16, 2012

By John Wiley & Sons, Ltd.