Search results for "environmental toxicology"

showing 5 items of 5 documents

Lichen microalgae are sensitive to environmental concentrations of atrazine

2017

The identification of new organisms for environmental toxicology bioassays is currently a priority, since these tools are strongly limited by the ecological relevance of taxa used to study global change. Lichens are sensitive bioindicators of air quality and their microalgae are an untapped source for new low-cost miniaturized bioassays with ecological importance. In order to increase the availability of a wider range of taxa for bioassays, the sensitivity of two symbiotic lichen microalgae, Asterochloris erici and Trebouxia sp. TR9, to atrazine was evaluated. To achieve this goal, axenic cultures of these phycobionts in suspension were exposed to a range of environmental concentrations of …

Chlorophyll0301 basic medicineTrebouxiaLichensPopulation010501 environmental sciencesBiologyEcotoxicology01 natural sciences03 medical and health scienceschemistry.chemical_compoundChlorophytaBotanyMicroalgaeEcotoxicologyAtrazineSymbiosiseducationAxenic0105 earth and related environmental scienceseducation.field_of_studyDose-Response Relationship DrugGeneral Medicinebiology.organism_classificationPollution030104 developmental biologychemistryEnvironmental toxicologyAtrazineEcotoxicityBioindicatorWater Pollutants ChemicalFood ScienceJournal of Environmental Science and Health, Part B
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LUMINESCENCE STUDY OF DETERGENT OPTICAL BRIGHTENERS IN THE CONTEXT OF DEVELOPING OPTICAL ENVIRONMENTAL SENSORS FOR WATER QUALITY CONTROL

2006

Water quality and anthropogenic loads in many, but not all, cases are related. Some water quality monitoring programs analyse samples for the presence of Escherichia coli. These bacteria can come from humans and animals. Human‐attributable effluent contains optical brighteners (OBs) from detergents. A convenient and affordable optical quantitative method giving a linear luminescence outcome over several orders of detergent concentrations in the water solution is demonstrated. The proposed method uses the common presence of OBs in detergents. Detergent concentration in water can be used as a surrogate indicator of resultant anthropogenic loads in water bodies. The proposed optical method wit…

Environmental Engineeringfluorescent whitening agents (FWAs)optical brighteners (OBs)Context (language use)TA170-171Management Monitoring Policy and Lawenvironmental toxicologyenvironmental pollution optical measurementsanthropogenic loads control and reduction in waterdetergentsEnvironmental chemistryEnvironmental scienceWater qualityLuminescenceeffluent monitoringEffluentquality of waterNature and Landscape ConservationJOURNAL OF ENVIRONMENTAL ENGINEERING AND LANDSCAPE MANAGEMENT
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Ecotoxicity of sediments in rivers: Invertebrate community, toxicity bioassays and the toxic unit approach as complementary assessment tools

2015

The determination of the real toxicity of sediments in aquatic ecosystems is challenging and necessary for an appropriate risk assessment. Different approaches have been developed and applied over the last several decades. Currently, the joint implementation of chemical, ecological and toxicological tools is recommended for an appropriate and successful toxicity risk assessment. We chose the combination of the toxic unit approach with acute pore water tests (Vibrio fischeri, Pseudokirchneriella subcapitata and Daphnia magna) and whole-sediment exposure tests (V. fischeri, Chironomus riparius), together with invertebrate community composition (multivariate analyses) to detect short and long-…

Geologic SedimentsEnvironmental Engineering010504 meteorology & atmospheric sciencesContaminants emergents en l'aiguaved/biology.organism_classification_rank.speciesDaphnia magnaVibrio fischeri010501 environmental sciencesEcotoxicology01 natural scienceschemistry.chemical_compoundRiversChlorophytaSediments fluvials -- Aspectes ambientalsAnimalsBioassayEnvironmental ChemistryPseudokirchneriella subcapitata14. Life underwaterEnvironmental toxicologyWaste Management and DisposalEcosystem0105 earth and related environmental sciencesChironomus ripariusEmerging contaminants in waterbiologyved/biologyEcologyChironomus ripariusAquatic ecosystemRiver sediments -- Environmental aspectsbiology.organism_classificationAliivibrio fischeriPollution6. Clean waterMacroinvertebrate communityToxicologia ambientalchemistryHeavy metals13. Climate actionChlorpyrifosToxicityEnvironmental toxicologyEnvironmental scienceBiological AssayChlorpyrifosEcotoxicityWater Pollutants ChemicalEnvironmental Monitoring
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Survey on the presence of non-dioxine-like PCBs (NDL-PCBs) in loggerhead turtles (Caretta caretta) stranded in south Mediterranean coasts (Sicily, So…

2017

A total of 71 loggerhead turtles (Caretta caretta) stranded along the coasts of Sicily (Southern Italy) were examined for non–dioxine like polychlorinated biphenyl (NDL-PCB) levels in muscle and adipose tissue by a gas chromatography-mass spectrometry/mass spectrometry (GC-MS/MS) method. The results revealed 6 high-indicator congener (∑6PCBIND) levels in 45% of the loggerhead turtles examined, with mean values of 980.39 ± 2508.39 ng/g wet weight in adipose tissue and 102.53 ± 238.58 ng/g wet weight in muscle tissue. The hexachloro and heptachloro PCB congeners were the most abundant in both the sample types. The highest NDL-PCB levels were reached in an adipose tissue sample of a logg…

MalePolychlorinated biphenyls (PCBs)Polychlorinated DibenzodioxinsGeographyMediterranean RegionHealth Toxicology and MutagenesisMusclesWildlife toxicologyPolychlorinated BiphenylsTurtlesAdipose TissueSurveys and QuestionnairesEnvironmental ChemistryAnimalsFemalePersistent organic pollutants (POPs)Environmental toxicologySicilyWater Pollutants ChemicalEnvironmental MonitoringEnvironmental toxicology and chemistry
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Prediction of potential environmental toxicity of chemicals in <em>Lactuca sativa</em> seed germination using computational tools

2019

The main aim of the study was to develop quantitative structure-activity relationship (QSAR) models for the prediction of phytotoxicity effects of chemical compounds on the Lactuca sativa seeds germination. A database of 73 compounds, assayed against L. sativa and Dragon’s molecular descriptors are used to obtain a QSAR model for the prediction of the phytotoxicity. The model is carried out with QSARINS software and validated according to OECD principles. The best model showed good value for the determination coefficient (R2 = 0.917) and others parameters appropriate for fitting (s = 0.256 and RMSEtr= 0.236). The validation results confirmed that the model has good robustness and stability …

Quantitative structure–activity relationshipbiologyGerminationMolecular descriptorEnvironmental toxicologyPhytotoxicityLactucaBiological systembiology.organism_classificationMathematicsProceedings of MOL2NET 2019, International Conference on Multidisciplinary Sciences, 5th edition
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