Environmental Toxicology
Environmental Toxicology - Related Videos
11:38
High Content Screening Analysis to Evaluate the Toxicological Effects of Harmful and Potentially Harmful Constituents (HPHC)
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Cited by 23 •
2016
The objective of the study was to assess the biological impact of 15 cigarette smoke constituents using a combination of an impedance-based real time cell analyzer and a high-content screening (HCS)-based platform for toxicological assessment in vitro. This study provides information on effective doses, toxicity and modes of action of the tested compounds.
01:34
Environmental Enrichment for Rodents
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2026
All animal procedures described here must be conducted in accordance with institutional animal ethics guidelines and approved by IACUC. All procedures must follow the principles of the 3Rs—Replacement, Reduction, and Refinement—and must be performed by trained personnel. Environmental enrichment involves objects and practices that encourage natural behaviors, improve psychological well-being, and promote better welfare in laboratory rodents. Environmental enrichment should be tailored to the...
10:48
Aseptic Technique in Environmental Science
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Luisa Ikner Aseptic technique is a fundamental skill widely practiced in the field of environmental microbiology that requires a balance of mindfulness and practice in the laboratory. Proper use of this technique reduces the likelihood of bacterial or fungal contamination of reagents, culture media, and environmental samples. Aseptic technique is also vital to ensure data integrity and...
09:17
Detection of Bacteriophages in Environmental Samples
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2023
Source: Laboratories of Dr. Ian Pepper and Dr. Charles Gerba - The University of Arizona Demonstrating Author: Alex Wassimi Viruses are a unique group of biological entities that infect both eukaryotic and prokaryotic organisms. They are obligate parasites that have no metabolic capacity, and in order to replicate, rely on host metabolism to produce viral parts that self-assemble inside host cells. Viruses are ultramicroscopic—too small to be viewed with the light microscope, visible only with...
09:33
Imaging Approaches to Assessments of Toxicological Oxidative Stress Using Genetically-encoded Fluorogenic Sensors
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Cited by 1 •
2018
This manuscript describes the use of genetically-encoded fluorogenic reporters in an application of live-cell imaging for the examination of xenobiotic-induced oxidative stress. This experimental approach offers unparalleled spatiotemporal resolution, sensitivity, and specificity while avoiding many of the shortcomings of conventional methods used for the detection of toxicological oxidative stress.
FAQs
Exposure pathways determine how an agent reaches an organism, while a dose-response relationship links the amount received with the magnitude of a biological effect. This distinction helps separate the presence of a pollutant from its actual hazard. Evaluating both factors can reveal whether effects arise through cellular signaling, altered enzyme activity, impaired reproduction, or disrupted development.
Toxicokinetics adds information about how an agent is handled within an organism, complementing exposure and dose-response measurements. In environmental toxicology, this perspective helps researchers interpret why the same contaminant may produce different biological outcomes across organisms or conditions. It strengthens evaluation of cellular, developmental, and reproductive effects.
Persistent contaminants can remain relevant over extended periods, while combined stressors may influence organisms and ecosystems together rather than independently. Environmental toxicology therefore examines how mixtures and changing environmental conditions could alter biological responses. This broader view supports better prediction of effects on populations, ecosystem function, and biodiversity than evaluating isolated exposures alone.
A practical investigation can combine laboratory tests with field monitoring, then use biomarkers and ecological risk assessment to interpret findings. Laboratory work can examine effects under controlled conditions, whereas field monitoring shows how contaminants occur in environmental settings. Together, these approaches connect biological evidence with ecological consequences and risk decisions.
Biomarkers provide biological evidence that an organism has responded to an environmental contaminant or stressor. When interpreted alongside exposure information and laboratory or field observations, they can indicate effects involving cellular signaling, enzyme activity, reproduction, or development. Their use helps connect pollutant presence with measurable biological change during environmental investigations.
Evidence from contaminant studies, biological measurements, and ecological risk assessment can inform pollution control and environmental regulation. The same information supports decisions about contaminated-site management and protection of biodiversity and human health. By linking exposures with effects in organisms and ecosystems, environmental toxicology provides a scientific basis for evaluating environmental hazards and possible consequences.