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Also part of Water Intelligence Online Digital Reference Library
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Available as an ebook
Please purchase via www.iwaponline.comOpens in new window
Also part of Water Intelligence Online Digital Reference Library
Standard ePrice: £37.00
+ VAT
Due to anthropogenic activities, freshwater systems worldwide are exposed to thousands of compounds. Monitoring of priority pollutants is important, however, monitoring of all individual compounds would be practically impossible. Moreover, the effects on human health remains mostly unknown since compound toxicity data is often absent. With the release of increasing amounts of new (emerging) chemicals into the environment, new monitoring strategies are required to assess the effects of (drinking water relevant) chemicals on human health. Therefore, sensitive in-vitro bioassays have been developed which focus on specific physiological effects such as endocrine disruption or mutagenicity. The advantages of bioassays are that they directly determine the effect of (an entire mixture of) compounds present in an environmental sample instead of identifying single compounds. These bioassays are able to detect known and unknown compounds as long as they trigger the bioassay response. However, a disadvantage of applying these assays may be that they each focus on a (relatively narrow selection of) specific physiological endpoint and that the human relevance is often obscure.
The evolution of new technologies and the recent advances in the knowledge on DNA sequences and organisation (i.e. genomics) have enabled the development of new holistic tools, such as DNA microarrays.
This report provides an overview of innovative omic methods and the mechanisms behind certain genomics technologies are explained. The main focus is on the potential application of DNA microarrays that are able to measure the impact of toxic substances on gene expression, i.e. transcription of DNA to mRNA (transcriptomics). Practical information on this method, such as sensitivity, analysis time, responsiveness, specificity, etc. is discussed. An overview is presented of the potential applications of this technology with regard to water quality assessment. In addition, the limitations and challenges that need to be overcome are discussed.
The following potential applications for genomics in water quality assessment are foreseen:
Introduction; Technical background; Biology; Toxicology; Genomics; Transcriptomics with DNA microarrays; Sensitivity; Analysis time; Responsiveness; Specificity; Cross species extrapolation; Toxicogenomics; Application of toxicogenomics; No Observable Transcriptional Effect Level (NOTEL) concept; Mode of action (MOA) approaches; Environmental monitoring; Risk assessment; Investigation of biological processes controlled by gene networks; Challenges for toxicogenomics; Model system complexity; Confounding factors; Mixtures; Limited sequence data; Bioinformatics; Costs; Research needs for regulatory implementation; Discussion on toxicogenomics for water quality monitoring; Mechanisms of toxicity and predictive toxicology; Environmental monitoring; NOTEL; Genomics as a tool for monitoring in relation to in vitro bioassays; Conclusions and outlook;
In many respects, lead in drinking water has become a forgotten problem, since the mid 1980s when a range of environmental controls were implemented to reduce exposure to lead. This is largely...
In many respects, lead in drinking water has become a forgotten problem, since the mid 1980s when a range of environmental controls were implemented to reduce exposure to lead. This is largely...
Special Offer: KWR Drinking Water Treatment Set - Buy all five books together and save a total £119!
Computational Fluid Dynamics (CFD)...
Preventing Legionellosis covers the biology of Legionella and presents a comprehensive review of best practices for legionellosis prevention from around the world.
...Ambient water quality criteria for recreational waters have been established based on epidemiologic studies of swimmers at beaches. Waters that cannot be used for full contact water recreation (...
Maintaining the microbial quality in distribution systems and connected installations remains a challenge for the water supply companies all over the world, despite many years of...
In many respects, lead in drinking water has become a forgotten problem, since the mid 1980s when a range of environmental controls were implemented to reduce exposure to lead. This is largely...