Toxicity Monitoring Articles

  • What are Regional Screening Levels (RSL) and why are they used?

    The Regional Screening Levels (RSL) can be described as risk-based concentrations derived from standardized equations combining exposure information assumptions with EPA toxicity data (United States Environmental Protection Agency, 2020). Why are SLs used? The EPA Regional Screening Levels (RSL) are used for site screening and as initial cleanup goals. In site screening, the most ...

  • Novel Techniques for Containment

    Abstract: Recently published scientific papers feature various aspects of pandemic “star” Coronavirus 19. This virus has significantly changed pharma research and production in a variety of unique ways. This white paper will focus on how research/production efforts might fail under the threats of highly contagious disease viruses, bacteria, and highly active ...


    By Flow Sciences Inc

  • Micromeritics Delivers Optimized Solution for Carbon Black Testing in Accordance with Latest ASTM Classification

    Micromeritics Instrument Corp., a leader in material characterization technology, has developed an optimized, automated solution for customers looking to characterize carbon blacks in accordance with the newly revised ASTM D1765-18 Classification System for Carbon Blacks Used in Rubber Products. Following a final balloting of ASTM Committee D24 on Carbon Black this system now includes void ...

  • The Benefits of Proper Gas Detection Device Maintenance

    If there is any chance the work conditions of your business will expose you and your employees to hazardous gases, explosive atmospheres, or oxygen deficiency, investing in reliable gas detection devices is a must. Once you have sifted through the numerous gas detection systems for sale and chosen the right one for your company, you need to properly maintain the devices so that they ...


    By DOD Technologies Inc

  • Toxkit Technology and New Zealand Water Quality Guidelines

    Abstract : The primary objective of this project was to evaluate six Toxkits and the IQ Toxicity TestsTM, for suitability in the role of screening of whole effluents in DTA required by Resource Consents. As an extension, their role as \'up the pipe\' toxicity identification tests were also evaluated. Screening tests must be cost effective (so that regular testing may be performed), ...


    By Microbiotests Inc.

  • The use of Algae in Ecotoxicological Testing : a Review

    Abstract :An intensive review on the use of algae in ecotoxicological testing is herein described. The state of the art in algal toxicity testing is given and the currently applied algal tests in hazard assessment schemes are emphasized. However, the need of an alternative, rapid and cost-effective algal tests is underscored considering the inequality between the plethora of new chemicals being ...


    By Microbiotests Inc.

  • Water Quality and Toxicity Assessment in Koronia Lake - Greece

    Abstract :Lake Koronia, located in Northern Greece, is an environmentally sensitive area protected by Ramsar Convention. However, COD values higher that 900 mg/l and nitrate-nitrogen concentration higher than 10 mg/l were measured in the lake water. Furthermore, toxicity bioassays based onDaphnia magna, resulted in mortality values of test species higher than 40% in the lake water. The poor water ...


    By Microbiotests Inc.

  • Interactive Toxic Effects of Agrochemicals on Aquatic Organisms

    Abstract : The effects of three common agrochemicals, lindane, methyl parathion and atrazine, on crustaceanDaphnia magna, algaSelenastrum capricornutumand marine bacteriumVibrio fischeriwere investigated in this study. Methyl parathion was the most toxic compound towards all three organisms, while lindane was more toxic toDaphnia magnaandVibrio fischerithan atrazine, and atrazine was more toxic ...


    By Microbiotests Inc.

  • Ecotoxicity Assessment of Landfill Leachates using a Battery of Bioassay and Toxicity Characterization of the Leachates

    Abstract : The western part of Teshima Island in the Seto Inland Sea (Japan) had been used as an illegal dumping ground for more than 10 years and the accumulated waste was estimated to be about 510.000 tons. There has been no systematic toxicity assessment conducted on this waste. In this study, a battery of bioassays was applied to the collected leachates. Toxicity of the leachates was ...


    By Microbiotests Inc.

  • Toxicity Assessment Assays in Greece

    Abstract :In this study the results of toxicity assessment assays in the area of Thessaloniki in Greece are presented.Daphnia magnatests were used for the assessment of freshwater and wastewater andArtemia salinatests for the assessment of seawater. There was increased toxicity in the seawater of inner Thermaikos gulf as well as in the freshwater of Koronia lake. Measures, taken to prevent toxic ...


    By Microbiotests Inc.

  • Alternative Assays for Routine Toxicity Assessments : a Review

    Abstract : The number of available aquatic toxicity tests is large and increases every year. For certain types of applications such as the routine screening of large numbers of environmental samples, standard conventional tests may be perceived as being unpractical. This has lead to the development of a (increasing) number of alternative small-scale toxicity tests also called microbiotests. The ...


    By Microbiotests Inc.

  • Bioassays used for Detection of Ecotoxicity at Contaminated Areas

    Abstract : Ten bioassays were used for the evaluation of acute, (sub)chronic toxicity and genotoxicity of an unknown soil from a military base and six model soils that were contaminated at former military bases with the major pollutants : kerosene, petroleum and used motor oil. The test species represented algae and higher plants, invertebrates and bacteria. The ability to detect toxicants in ...


    By Microbiotests Inc.

  • Predicting the Toxicity of Oil-Shale Industry Wastewaters by its Phenolic Composition

    Abstract : The chemical composition and toxicity of five phenolic wastewaters samples collected from the Kohlta-Järve (Estonia) oil-shale industry region were analysed. The total phenolic contents (HPLC data) of these samples ranged from 0.7 mg/l to 195 mg/l. A total of 11 phenol (up to 84 mg/l) and p-cresol (up to 74 mg/l). Artificial phenolic mixtures were also composed, to mimic the ...


    By Microbiotests Inc.

  • Toxicological Evaluation of the Chemical Oxidation Methods for Landfill Stabilization

    Abstract : As the stabilization criteria for landfill sites, only chemical criteria for the leachate discharges from the landfill sites have been used in Japan and many other countries. Recently, chemical oxidation has been developed as a method for the early-stabilization of landfills. However, by-products that are difficult to detect by chemical analysis can be produced by this method. ...


    By Microbiotests Inc.

  • Toxicity and Microcystin Content of Extracts from a Planktothrix Bloom and Two Laboratory Strains

    Abstract : Toxic effects and microcystin content from various extracts of aPlanktothrix agardhiibloom and two different strains ofPlanktothrix agardhii, HUB 076, and NIVA 34 were investigated. Extracts were obtained with solvents of different polarity such as hexane, dichloromethane, methanol, and water. Additionally, different pre-treatments were used to break the cells before extraction. Acute ...


    By Microbiotests Inc.

  • Sensitivity of Microscale Ecotoxicity Tests and their Suitability to Measure Toxicity of Environmental Samples

    Abstract : Aquatic microbiotests were selected and evaluated for their potential usefulness in measuring ecotoxicity in monitoring programs. Microbiotests are tests with aquatic invertebrates that demand a shorter exposure period and a smaller test volume than conventional aquatic ecotoxicity test methods. Microbiotests evaluated were the Thamnotox F test, the Rotox F test, the Algaltoxkit F ...


    By Microbiotests Inc.

  • The Predictive Potential of a Battery of Ecotoxicological Tests for Human Acute Toxicity, as Evaluated with the First 50 MEIC Chemicals

    Abstract : The acute toxicities of the first 50 chemicals (dextropropoxyphene hydrochloride excluded) of the multicentre evaluation of in vitrocytotoxicity (MEIC) programme were determined on four aquatic invertebrates and a bacterial strain (Photobacterium phosphoreumfor the MicrotoxTM test) commonly used in ecotoxicology testing. Three of the aquatic invertebrate tests consisted of ...


    By Microbiotests Inc.

  • Sensitivity Comparison of the Conventional Acute Daphnia magna Immobilization Test with the Daphtoxkit FTM Microbiotest for Household Products

    Abstract : A comparative study has been made of the sensitivity of the acute Daphnia magna immobilization test and the Daphtoxkit F™ magna microbiotest for 30 household products of different categories (cleaning and degreasing products used in the industry, wash products for large laundries, household cleaning products and products for hygienic and personal care). The study revealed that ...


    By Microbiotests Inc.

  • Cyst-Based Toxicity Tests. - VII. Evaluation of the 1-h Enzymatic Inhibition Test (Fluotox) with Artemia nauplii

    Abstract : The newly developed 1 h enzymatic inhibition bioassay (Fluotox) was applied to toxicity testing with the larvae of the brine shrimp Artemia. The method consists of visual observation of in vivo inhibition of an enzymatic process using a fluorigenic enzyme substrate. The 1 h Fluotox test and the conventional 24 h and 48 h LC50 toxicity tests were conducted in parallel on 8 different ...


    By Microbiotests Inc.

  • Using Toxkits for Calculating Interactive Effects of Chemicals

    Abstract : The effects of 3 common pesticides (lindane, methyl-parathion and atrazine) and of 2 metals (cadmium and chromium) are investigated in this study on a crustacean (Daphnia magna) and on micro-algae (Selenastrum capricornutum). Methyl-parathion was the most toxic compound towards both test species, while lindane was more toxic to D. magna than atrazine and atrazine was more toxic to S. ...


    By Microbiotests Inc.

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