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Dílnička U šesti pružinek
Zpříjemněte si předvánoční čas pohádkou a malováním! Rodina šikovných skřítečků vám ve svých pohádkách připomene, co je o svátcích nejdůležitější. Kromě pohádek v knížce najdete i omalovánkový adventní kalendář, který všem nedočkavcům pomůže zkrátit čekání na Vánoce.
Povidky
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The Llobregat
The Llobregat belongs to the most thoroughly studied rivers in Europe and is a paradigm of the confluence of human and natural disturbances in a single basin. Because of its location in a very densely populated region and its Mediterranean character, the Llobregat supports a mixture of irregular flow, water abstraction, excess nutrients, mining debris, and a wide array of pollutants. The aquatic organisms strive to survive in a dramatically changing river that passes through a succession of dams, weirs and channels. The long-term river monitoring as well as the research that has been carried out in the river for a long time have provided an extensive knowledge of these disturbances and their effects on the biological communities. This book highlights the available information, with emphasis on the hydrological, chemical and biological elements interspersed in the river. Experts in the field discuss the main nutrient patterns and pollutant occurrence and the responses of the biological quality elements as well as the river ecosystem to the overall natural and man-made influences.
Early Development of Xenopus Laevis
Amphibian embryos are supremely valuable in studies of early vertebrate development because they are large, handle easily, and can be obtained at many interesting stages. And of all the amphibians available for study, the most valuable is Xenopus laevis,which is easy to keep and ovulates at any time of year in response to simple hormone injections. Xenopusembryos have been studied for years but this is a particularly exciting time for the field. Techniques have become available very recently that permit a previously impossible degree of manipulation of gene expression in intact embryos, as well as the ability to visualize the results of such manipulation. As a result, a sophisticated new und...
Best Practice Guidelines for Great Ape Tourism
Executive summary: Tourism is often proposed 1) as a strategy to fund conservation efforts to protect great apes and their habitats, 2) as a way for local communities to participate in, and benefit from, conservation activities on behalf of great apes, or 3) as a business. A few very successful sites point to the considerable potential of conservation-based great ape tourism, but it will not be possible to replicate this success everywhere. The number of significant risks to great apes that can arise from tourism reqire a cautious approach. If great ape tourism is not based on sound conservation principles right from the start, the odds are that economic objectives will take precedence, the ...
Chemical Mixtures and Combined Chemical and Nonchemical Stressors
In this book, both basic and advanced concepts are discussed for considering mixtures from initial exposure characterization through evaluation of risk associated with combined exposures. This book will provide an introduction to key issues and multiple options for evaluating both the toxicity of mixtures as well as the risk associated with exposure to mixtures. Additionally, promising tools adapted from other disciplines will be discussed in the context of mixtures toxicology and risk assessment. Finally, the discussion will move beyond chemical mixtures to address incorporating non-chemical stressors into toxicity studies and cumulative risk assessments. Although exposure to multiple chemical and non-chemical stressors is the rule, not the exception, consideration of mixtures in toxicology and risk assessment continues to be a significant challenge. This book will be an essential resource for researchers and professionals in the fields of toxicology, epidemiology, exposure science, risk assessment, and statistics.
Emerging Contaminants Vol. 1
Emerging contaminants are chemical and biological agents for which there is growing concern about their potential health and environmental effects. The threat lies in the fact that the sources, fate and toxicology of most of these compounds have not yet been studied. Emerging contaminants, therefore, include a large number of both recently discovered and well-known compounds such as rare earth elements, viruses, bacteria, nanomaterials, microplastics, pharmaceuticals, endocrine disruptors, hormones, personal care products, cosmetics, pesticides, surfactants and industrial chemicals. Emerging contaminants have been found in many daily products, and some of them accumulate in the food chain. Correlations have been observed between aquatic pollution by emerging contaminants and discharges from wastewater treatment plants. Most actual remediation methods are not effective at removing emerging contaminants. This first volume presents comprehensive knowledge on emerging contaminants with a focus on analysis, toxicity, antibiotic resistance and human health.
Best Practice Guidelines for the Prevention and Mitigation of Conflict Between Humans and Great Apes
Executive summary: One of the challenges facing great ape conservation is the rising level of interaction between humans and great apes, and the resulting conflicts that emerge. As human populations continue to grow and human development makes deeper incursions into forest habitats, such conflicts will become more widespread and prevalent in the natural ranges of great apes, especially considering that the majority of great apes live outside protected areas. It is essential that we develop a comprehensive understanding of existing and potential conflict situations, and their current or future impacts on both great apes and humans. This will require the integration of quantitative and qualita...
Environmental Remediation Through Carbon Based Nano Composites
This book examines carbon-based nanocomposite materials and their application in various environmental fields, such as wastewater treatment, and air and soil remediation. Featuring illustrations, and tables summarizing the latest research, it gathers up-to-date information on the application of carbon nanocomposites in the removal of environmental pollutants from different sources. Given its scope, the book is a valuable textbook for research students, and a useful handbook and reference resource for researchers, academics and industrial scientists working in the field of environmental pollutants and their safe removal.
