Contribution à l'étude d'une méthode d'échantillonnage sur support sec du dioxyde de soufre en pollution atmosphérique PDF Download
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Author: Marie-José Bel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 136
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Book Description
Author: Marie-José Bel
Publisher:
ISBN:
Category :
Languages : fr
Pages : 136
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Book Description
Author: Haroun Tazieff
Publisher: Elsevier Publishing Company
ISBN:
Category : Nature
Languages : en
Pages : 672
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Book Description
Author: Patrick Huguenin-Dumittan (médecin.)
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Author: Victor Hugo Paramo
Publisher:
ISBN:
Category :
Languages : fr
Pages : 190
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Book Description
Aspects théoriques du transfert de polluants atmosphère-sol : dépôt sec, dépôt humide. Méthodes de mesure, d'analyse et d'échantillonnage (volume, PH, conductivité, fluorures, sulfates, nitrates, ammonium, sodium, potassium, magnésium, calcium et ammonium)
Author: MICHELE.. JORDA
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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Book Description
L'ETUDE DU DIOXYDE DE SOUFRE (SO#2), POLLUANT DE L'ATMOSPHERE TERRESTRE PRESENTE UN INTERET CERTAIN POUR LA COMPREHENSION DE LA FORMATION, PAR NUCLEATION AUTOUR D'UN ION OU PAR AGREGATION, DES AEROSOLS DANS LESQUELS INTERVIENT CE GAZ. DES AGREGATS D'IONS MOLECULAIRES NEGATIFS, SONT ETUDIES EXPERIMENTALEMENT AFIN DE DETERMINER LES CONSTANTES THERMOCHIMIQUES DES REACTIONS D'AGREGATIONS DANS DU SO#2 PUR ET DANS DES MELANGES SO#2-O#2. LE DISPOSITIF EXPERIMENTAL EST COMPOSE D'UNE CHAMBRE DE REACTION (LES PRESSIONS DU GAZ ETUDIE SONT COMPRISES ENTRE 50 ET 140 TORR), OU SONT PRODUITES LES ESPECES IONIQUES PAR LE RAYONNEMENT ISSU DE SOURCES RADIOACTIVES DE #2#4#1AM (40 CI/CM#2). LES IONS, EXTRAITS AU TRAVERS D'UN ORIFICE, SONT ANALYSES PAR UN SPECTROMETRE DE MASSE QUADRUPOLAIRE. DANS LE SO#2 PUR, LES ESPECES IDENTIFIEES ET ETUDIEES SONT LES AGREGATS SO#2#?(SO#2)#N AVEC N6 DONT LES VARIATIONS D'ENTHALPIE ET D'ENTROPIE DE FORMATION POUR 3N6 SONT MESUREES; ELLES N'ETAIENT PAS ENCORE CONNUES ET SONT COHERENTES AVEC LES RESULTATS D'AUTRES ETUDES POUR N2. CES VALEURS EXPERIMENTALES PERMETTENT, PAR COMPARAISON AVEC LES ENERGIES DE LIAISON CALCULEES, DE MIEUX CONNAITRE LES INTERACTIONS ENTRE LES DIFFERENTS ELEMENTS DES AMAS ET MONTRENT QUE L'INTERACTION DIPOLE-DIPOLE EST IMPORTANTE POUR LA STABILITE DES AGREGATS SO#2#?(SO#2)#N. DANS LES MELANGES SO#2-O#2, ETUDIES POUR DIFFERENTES PROPORTIONS DE SO#2, LES ESPECES SO#2#?(SO#2)#N?O#2 ET SO#3#?(SO#2)#N?O#2 (N3), ONT ETE DE MEME IDENTIFIEES ET ETUDIEES. LES DONNEES THERMOCHIMIQUES NOUVELLES PERMETTENT D'APPREHENDER LA STRUCTURE ET LES LIAISONS DES AGREGATS ETUDIES
Author: Jacques Sarrailh
Publisher:
ISBN:
Category :
Languages : fr
Pages : 158
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Author: Linda Strande
Publisher: IWA Publishing
ISBN: 1780404735
Category : Technology & Engineering
Languages : en
Pages : 428
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Book Description
It is estimated that literally billions of residents in urban and peri-urban areas of Africa, Asia, and Latin America are served by onsite sanitation systems (e.g. various types of latrines and septic tanks). Until recently, the management of faecal sludge from these onsite systems has been grossly neglected, partially as a result of them being considered temporary solutions until sewer-based systems could be implemented. However, the perception of onsite or decentralized sanitation technologies for urban areas is gradually changing, and is increasingly being considered as long-term, sustainable options in urban areas, especially in low- and middle-income countries that lack sewer infrastructures. This is the first book dedicated to faecal sludge management. It compiles the current state of knowledge of the rapidly evolving field of faecal sludge management, and presents an integrated approach that includes technology, management, and planning based on Sandecs 20 years of experience in the field. Faecal Sludge Management: Systems Approach for Implementation and Operation addresses the organization of the entire faecal sludge management service chain, from the collection and transport of sludge, and the current state of knowledge of treatment options, to the final end use or disposal of treated sludge. The book also presents important factors to consider when evaluating and upscaling new treatment technology options. The book is designed for undergraduate and graduate students, and engineers and practitioners in the field who have some basic knowledge of environmental and/or wastewater engineering.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309170435
Category : Nature
Languages : en
Pages : 241
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Book Description
Having safe drinking water is important to all Americans. The Environmental Protection Agency's decision in the summer of 2001 to delay implementing a new, more stringent standard for the maximum allowable level for arsenic in drinking water generated a great deal of criticism and controversy. Ultimately at issue were newer data on arsenic beyond those that had been examined in a 1999 National Research Council report. EPA asked the National Research Council for an evaluation of the new data available. The committee's analyses and conclusions are presented in Arsenic in Drinking Water: 2001 Update. New epidemiological studies are critically evaluated, as are new experimental data that provide information on how and at what level arsenic in drinking water can lead to cancer. The report's findings are consistent with those of the 1999 report that found high risks of cancer at the previous federal standard of 50 parts per billion. In fact, the new report concludes that men and women who consume water containing 3 parts per billion of arsenic daily have about a 1 in 1,000 increased risk of developing bladder or lung cancer during their lifetime.
Author: International Livestock Research Institute
Publisher: ILRI (aka ILCA and ILRAD)
ISBN: 9789291460038
Category : Animal industry
Languages : en
Pages : 268
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Book Description
Policy concepts; Identification of policy issues; Production systems, supply and demand; Market, price and trade policies; Marketing and distribution systems; Budget and manpower planning; Land tenure police for the livestock sector; Policy analysis report writing and communication; Livestock production and marketing in alphabeta - a case study.
Author: Ursula Jakob
Publisher: Springer Science & Business Media
ISBN: 9400757875
Category : Science
Languages : en
Pages : 488
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Book Description
Many physiological conditions such as host defense or aging and pathological conditions such as neurodegenerative diseases, and diabetes are associated with the accumulation of high levels of reactive oxygen species and reactive nitrogen species. This generates a condition called oxidative stress. Low levels of reactive oxygen species, however, which are continuously produced during aerobic metabolism, function as important signaling molecules, setting the metabolic pace of cells and regulating processes ranging from gene expression to apoptosis. For this book we would like to recruit the experts in the field of redox chemistry, bioinformatics and proteomics, redox signaling and oxidative stress biology to discuss how organisms achieve the appropriate redox balance, the mechanisms that lead to oxidative stress conditions and the physiological consequences that contribute to aging and disease.
