Download or read book Caract risation exp rimentale des sources de compos s organiques volatils dans deux m gapoles contrast es written by Cécile Gaimoz and published by . This book was released on 2009 with total page 554 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work aims at characterizing Volatile Organic Compounds VOC sources and variability in two contrasted megacities (Paris and Beijing). This study based on an important experimental work, which includes instrumental optimization and participation in two intensive fields campaigns performed in May-June 2007 in Paris and in August 2007 in Beijing. Following qualitative analysis of the data sets and using a receptor model based on the PMF method, seven and ten sources of VOC were extracted for Paris and Beijing respectively. Traffic emissions are major VOC local/regional sources contributing to 54% and 35% of emissions in Paris and Beijing respectively. However, continental or regional emissions are also playing a significant role in the measured concentrations and so in the strength of VOC sources at sites receptors. Thus Paris is highly influenced by emissions from north-eastern Europe under anticyclonic condition, and Beijing by regional emissions from the Hebei province, in the south-east sector. Finally, identified sources and their contributions are compared to emission inventory data. For Paris, these results show significant differences with the local emission inventory, and suggest an overestimation of solvent emissions in the inventory.

Download or read book Caract risation des compos s organiques volatils dans l air ambiant written by Nadine Locoge and published by . This book was released on 2006 with total page 329 pages. Available in PDF, EPUB and Kindle. Book excerpt: Le second axe de recherche a été orienté sur le comportement des COV dans l'atmosphère et a permis d'améliorer les connaissances à la fois en termes de teneurs mesurées mais aussi de variabilité de ces teneurs et de leurs liens avec les sources qui en sont à l'origine. Les traitements mis en œuvre combinent des outils descriptifs complémentaires et sont aujourd"hui opérationnels, modulables et transposables à d'autres aires d'étude. Un bilan qualitatif des différentes sources à l' origine des concentrations ambiantes en COV a été réalisé et les échelles de variation temporelles et spatiales ont été établies. Ce bilan qualitatif a été complété par une approhe quantitative qui a permis d'avoir accès aux contributions des différentes sources d'émission aux teneurs ambIantes. Le développement et la mise en œuvre de plusieurs modèles a permis dans un premier temps de quantifier de manière individuelle, composé par composé, la contribution de la source «gaz d'échappement automobile» aux teneurs ambiantes tant dans son évolution temporelle que spatiale puis dans un second temps d'évaluer la contribution de la totalité des sources en considérant les concentrations globales en COV.

Download or read book Basic Technics in Ecological Farming Techniques de Base en Agriculture Biologique Grunds tzliche Verfahren der kologischen Landwirtschaft Le Maintien de la Fertilit des Sols The Maintenance of Soil Fertility Die Erhaltung der Bodenfruchtbarkeit written by Stuart Hill and published by Birkhäuser. This book was released on 2013-12-14 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Health Effects of Environmental Pollution written by and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Boundaries of the West African Craton written by Nasser Ennih and published by Geological Society of London. This book was released on 2008 with total page 552 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Progress in Chemical Toxicology written by Abraham Stolman and published by Elsevier. This book was released on 2013-10-22 with total page 406 pages. Available in PDF, EPUB and Kindle. Book excerpt: Progress in Chemical Toxicology, Volume 5 covers topics on the improved isolation and detection procedures and quantitation methods for volatile poisons, stimulants, hallucinogenic drugs, and marihuana. The book discusses the absorption, distribution, and excretion of drugs and poisons and their metabolites; the system for the toxicological analysis of drugs in biological specimens; and the isolation and analysis of phenothiazines. The text also describes the use of fluorescence in toxicology and the toxicology of new synthetic organic polymers used in containers for food, pharmaceutical compounds, and drinkable water. Some microcrystal tests for drugs and advances in polarography as applied to toxicological analysis are also considered. Biochemists, toxicologists, and scientists involved in the study of narcotics will find the book invaluable.

Download or read book Technocratic Dreaming written by Paul James and published by . This book was released on 1990 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Technocratic dreaming of very fast trains and Japanese designer cities.

Download or read book Lead Poisoning in Childhood written by Siegfried M. Pueschel and published by Brookes Publishing Company. This book was released on 1996 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: This resource examines the causes and consequences of childhood lead poisoning, offers cost-effective prevention strategies, and explores crucial legislation that can and should protect children at risk. Information on screening tests, nutrition, treatment guidelines, and safe environmental abatement techniques will help pediatricians, physicians, social workers, and nurses understand, treat, and eliminate lead poisoning in children.

Download or read book Inhaled Particles and Vapours written by British Occupational Hygiene Society and published by Pergamon. This book was released on 1961 with total page 598 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Perspectives for Agroecosystem Management written by Peter Schroder and published by Elsevier. This book was released on 2011-08-19 with total page 457 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sustainable agriculture is a key concept for scientists, researchers, and agricultural engineers alike. This book focuses on the FAM- project (FAM Munich Research Network on Agroecosystems) of the 1990s as a means to assessing, forecasting, and evaluating changes in the agroecosystems that are necessary for agricultural sustainability. The management of two separate management systems: an organic and an integrated farming system are described to provide an interdisciplinary approach Changes of matter fluxes in soils, changes of trace gas fluxes from soils, precision farming in a small scale heterogen landscape, influence of management changes on flora and fauna, as well as the development of agroecosystem models, the assessment of soil variability and the changes in nutrient status are important aspects of this book.* Contains detailed results and insight of a long-time project on agricultural sustainability* Provides an interdisciplinary approach for comprehensive understanding by scientists and researchers of soil, plants, agriculture, and environment * Includes an international perspective