Search results “Principles of ecotoxicology”
2. Master Ecotoxicology - Principles of Ecotoxicology
This video curriculum provides you with general details on the Master program and its compulsary modules. Part 1 deals on the Principles of Ecotoxicology module.
Views: 1100 Master Ecotoxicology
Ecotoxicology: A Lecture with Dr. Jessica Hua
In which Dr. Jessica Hua discusses phenotypic plasticity and the evolution of pesticide resistance in woodfrogs,
Views: 561 EvoS Seminar Series
Applied Ecology: Ecotoxicology
Subject:Zoology Paper: Principles of ecology
Views: 532 Vidya-mitra
BIOMAE - "Ecotoxicology : the study of the effects of toxic chemicals on biological organisms"
Présentation de la société BIOMAE et de ses activités - Avril 2016. "Ecotoxicology : the study of the effects of toxic chemicals on biological organisms". Written, directed, narrated & edited by Dionne R. Ramadeen.
Views: 842 BIOMAE Sas
Basic Principles of Toxicology
Toxicology depends on variables such as dosage and routes of experience. To learn more about the Flinn Scientific Laboratory Safety Training Course visit us at: http://labsafety.flinnsci.com/Home.aspx Be sure to subscribe and check out more videos! Subscribe: https://www.youtube.com/channel/FlinnScientific/ Facebook: https://www.facebook.com/FlinnScientific/ Website: https://www.flinnsci.com/
Views: 65538 FlinnScientific
Part 1: Ecotoxicology: Exposure
Video create by Prof. Dr. Ralf Schulz (Expert in Ecotoxicology) and Dr. Mäggi Hieber Ruiz (Expert in Limnology, worked for NGO in Latin America)
Views: 4519 SpatialPublicHealth
Effect-Based Tools: Monitoring & Predicting Aquatic Ecotoxicological Effects of Chemicals (I)
Richard E Connon University of California Davis USA
Views: 903 KS Goh
Made by Aurel Gaulin with Premiere Pro
Views: 250 ArP_pOiSoNiNg
Unit of Experimental Toxicology and Ecotoxicology (UTOX-PCB)
Unit of Experimental Toxicology and Ecotoxicology description: Unit of Experimental Toxicology and Ecotoxicology of Parc Científic Barcelona
Biology-based models applied to ecotoxicology
In order to characterize the risk an emission of chemicals poses to the environment, both a dose(concentration)- response(effect) assessment and an exposure assessment are performed. The objective of the concentration-effect assessment is to predict the concentration of the substance below which adverse effects in the environmental compartment of concern are not expected to occur. This concentration is known as the predicted no-effect concentration (PNEC). Thereby, the aim of the risk-oriented environmental policy is to achieve concentrations in the environment such that the risks for humans and their biomes are negligible. The concept ”No Effect” has a dominant place in these risk based frameworks. Several alternatives ways to evaluate "No-Effects" have been proposed. This talk will focus on the history, development and application of the most scientifically defensible of the options: biology-based models. In response to the demand of the Dutch ministry, the Theoretical Department (Vrije Universiteit, Amsterdam) proposed biology based models for the analysis of toxicity data (1994). These models are based on first principles, are chemically implicit, and make use of general systems theory. An entire theoretical modelling framework, the Dynamic Energy Budget (DEB) theory, was built allowing the construction of families of biology-based models for analyzing toxic effects and coupling those effects to other types of models, such as ecosystem or population dynamics models. These methods were recommended by both the ISO and the OECD in 2004 for analyzing toxicity data. In this talk we will review the initial problems which gave rise to 'biology-based models', which are in fact DEB models. Then we will present the developments of the DEB theory from 1974 till today. We will show that applications in ecotoxicology remained on the agenda since the start of the DEB program. These applications are based on the idea that effects relate to internal concentrations of compounds and therefore incorporate availability, toxico-kinetic and transformation modules for those compounds. We will then illustrate how DEB theory allowed the development of a family of models ranging from simple to advanced. Realism and data-availability affect the optimal choice of model in each particular case. We will then provide a brief discussion on data availability. We will conclude the talk, by showing that not only are DEB models the most scientifically defensible framework for evaluating "No-Effect" concentrations, but also that is the best tested modelling framework to this day having benefitted from a coherent 35 year testing and R&D program.
Views: 355 DEB videos
Part 2: Ecotoxicology: Effects and Risk Mitigation
Video create by Prof. Dr. Ralf Schulz (Expert in Ecotoxicology), Pesticides, Effects and Risk Mitigation
Views: 1307 SpatialPublicHealth
Chemical Ecotoxicology
Views: 11 Ada Higgins
Soil 2017 | Lecture 10: Terrestrial ecotoxicology for chemical risk assessment (Oliver/Keele)
Lecture 10 of the 2017 IIES E-Lecture Series on Soil Contamination and Remediation. Talk by Prof Ian Oliver from Keele University, "Terrestrial ecotoxicology for chemical risk assessment". Recorded on May 8, 2017.
Soil 2017 | Lecture 9: Principles and practise of terrestrial ecotoxicology (Oliver/Keele)
Lecture 9 of the 2017 IIES Soil Contamination and Remediation E-Lecture Series. "Principles and practise of terrestrial ecotoxicology" Talk by Prof. Ian Oliver from Keele University. Recorded on May 1, 2017.
Ecotoxicology from a different perspective
Lecture by Jan Baas. Current approaches in ecotoxicology are based on mostly standardised OECD test protocols and typically result in summary statistics as LC or EC50 for growth and/or growth rate, reproduction and/or reproduction rate and possibly NOECs and LOECs. These summary statistics are also used in the regulation of chemicals, such as REACH. If we take a closer look at this approach a number of questions arise: • Why do we measure different endpoints? • Why do we treat the endpoints as independent? • How do the test conditions influence the results? • How do these endpoints depend on time? But the most important question is how can we use these measurements to make valid predictions on environmental effects, where exposure is not standardised and constant, where organisms are exposed to more or less complex mixtures, where organisms are exposed under non constant food conditions, where…. To address this type of questions a different line of reasoning is needed. This different line of reasoning can be found in the Dynamic Energy Budget approach. This approach allows interpreting toxic effects on different endpoints within one consistent framework, in the end it is the same organism and effects on growth, reproduction and survival must therefore be linked. This approach also gives a natural framework in which small toxic effects on reproduction can be understood on a population level. In the presentation examples will be given on how toxic effects of single compounds can be interpreted within the framework of DEB theory and applications and examples of how the approach can be used for the interpretation of effects of mixtures.
Views: 1066 DEB videos

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