CONTRIBUTION A UNE APPROCHE GLOBALE DU TRAITEMENT DE POUDRES PAR PLASMA D'INDUCTION PDF Download

Author: CYRIL LOUIS CHRISTIAN.. DOUDOU
Publisher:
ISBN:
Category :
Languages : fr
Pages : 225

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Book Description
LA RECHERCHE TENTE DEPUIS PLUSIEURS ANNEES DE MULTIPLIER LES DEBOUCHES INDUSTRIELS POUR LES PROCEDES A PLASMA D'INDUCTION DE FORTE PUISSANCE. DANS LE DOMAINE DES MATERIAUX NOTAMMENT, CERTAINES APPLICATIONS SONT PROMETTEUSES. NOTRE TRAVAIL CONCERNE L'ETUDE D'UN PROCEDE A PLASMA INDUCTIF DEDIE AU TRAITEMENT DE POUDRES. NOUS DEVELOPPONS UNE DEMARCHE ORIGINALE S'APPUYANT SUR LA NOTION DE TRACEUR UTILISEE EN GENIE DE LA REACTION CHIMIQUE. IL S'AGIT D'INJECTER DANS LA DECHARGE DES MATERIAUX SELECTIONNES POUR LEURS PROPRIETES PHYSICO-CHIMIQUES. AU COURS DE LEUR PASSAGE DANS LE PLASMA, ILS SUBISSENT UNE TRANSFORMATION TEMOIGNANT DE LEUR HISTOIRE THERMIQUE. APRES CARACTERISATION DES MATERIAUX, ON PEUT EN EMPLOYANT UNE METHODE STATISTIQUE, REMONTER AUX TEMPERATURES DE LA DECHARGE ET A LA DISTRIBUTION DES TEMPS DE SEJOUR DES POUDRES. DANS NOTRE ETUDE, CES DEUX PARAMETRES SE CONFONDENT EN UNE VARIABLE APPELEE TEMPS THERMIQUE, DONT LE CONCEPT A ETE PROPOSE PAR NAUMAN. LA MESURE DE CETTE VARIABLE DEMANDE LE DEVELOPPEMENT CONJOINT D'UNE SIMULATION NUMERIQUE ET D'UNE APPROCHE EXPERIMENTALE. NOTRE MODELISATION DE L'INTERACTION ENTRE LE PLASMA ET LES PARTICULES REPOSE SUR L'ETUDE DES PHENOMENES DE TRANSPORT DE CHALEUR ET DE MATIERE. NOUS EVALUONS ALORS L'HISTOIRE THERMIQUE DES PARTICULES DANS LA DECHARGE. EXPERIMENTALEMENT, UN PROCEDE DE MESURE BAPTISE THERMOMETRE A YTTRIUM, FOURNIT UN APERCU DE LA DISTRIBUTION DES TEMPERATURES DU PLASMA EN FONCTION DES CONDITIONS OPERATOIRES. NOUS OPTIMISONS AINSI LES CONDITIONS D'INJECTION. FINALEMENT, LES REPERCUSSIONS DES VARIATIONS DU REGLAGE DU PROCEDE SONT OBSERVEES SUR DES PARTICULES DE ZIRCONE POREUSE, TRACEUR RETENU. LES ANALYSES MONTRENT UNE IMPORTANTE HETEROGENEITE DANS LE TRAITEMENT, RESULTAT D'UNE DISTRIBUTION TRES LARGE DES TEMPS THERMIQUES DANS LE REACTEUR. LES CAUSES DE CETTE HETEROGENEITE SONT EXAMINEES, ET DES CONSEQUENCES SONT TIREES QUANT AUX LIMITES DES PROCEDES A PLASMA INDUCTIF DANS LE TRAITEMENT DES POUDRES.

Author: National Research Council
Publisher: National Academies Press
ISBN: 0309170435
Category : Nature
Languages : en
Pages : 241

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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: Sylvie Yona Waksman
Publisher:
ISBN: 9782356680709
Category :
Languages : en
Pages :

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Author: World Health Organization
Publisher: World Health Organization
ISBN: 9241549602
Category : Medical
Languages : en
Pages : 203

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First published in March 2014 under the title "Clinical management of patients with viral haemorrhagic fever: a pocket guide for front-line health workers: interim emergency guidance for West Africa".

Author: Gerald G. Moy
Publisher: Springer
ISBN: 9781493939091
Category : Technology & Engineering
Languages : en
Pages : 0

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Unless a food is grossly contaminated, consumers are unable to detect through sight or smell the presence of low levels of toxic chemicals in their foods. Furthermore, the toxic effects of exposure to low levels of chemicals are often manifested slowly, sometimes for decades, as in the case of cancer or organ failure. As a result, safeguarding food from such hazards requires the constant monitoring of the food supply using sophisticated laboratory analysis. While the food industry bears the primary responsibility for assuring the safety of its products, the overall protection of people’s diets from chemical hazards must be considered one of the most important public health functions of any government. Unfortunately, many countries do not have sufficient capability and capacity to monitor the exposure of their populations to many potentially toxic chemicals that could be present in food and drinking water. Without such monitoring, public health authorities in many countries are not able to identify and respond to problems posed by toxic chemicals, which may harm their population and undermine consumer confidence in the safety of the food supply. From a trade perspective, those countries that cannot demonstrate that the food they produce is free of potentially hazardous chemicals will be greatly disadvantaged or even subject to sanctions in the international marketplace. The goal of a total diet study (TDS) is to provide basic information on the levels and trends of exposure to chemicals in foods as consumed by the population. In other words, foods are processed and prepared as typical for a country before they are analyzed in order to better represent actual dietary intakes. Total diet studies have been used to assess the safe use of agricultural chemicals (e.g., pesticides, antibiotics), food additives (e.g., preservatives, sweetening agents), environmental contaminants (e.g., lead, mercury, arsenic, cadmium, PCBs, dioxins), processing contaminants (e.g., acrylamide, polycyclic aromatic hydrocarbons, chloropropanols), and natural contaminants (e.g., aflatoxin, patulin, other mycotoxins) by determining whether dietary exposure to these chemicals are within acceptable limits. Total diet studies can also be applied to certain nutrients where the goal is to assure intakes are not only below safe upper limits, but also above levels deemed necessary to maintain good health. International and national organizations, such as the World Health Organization, the European Food Safety Agency and the US Food and Drug Administration recognize the TDS approach as one of the most cost-effective means of protecting consumers from chemicals in food, for providing essential information for managing food safety, including food standards, and for setting priorities for further investment and study. Total Diet Studies introduces the TDS concept to a wider audience and presents the various steps in the planning and implementation of a TDS. It illustrates how TDSs are being used to protect public health from chemicals in the food supply in many developed and developing countries. The book also examines some of the applications of TDSs to specific chemicals, including contaminants and nutrients.

Author: Philip A. Pizzo
Publisher: Lippincott Williams & Wilkins
ISBN: 9780683303995
Category : Medical
Languages : en
Pages : 849

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Recommended in the Brandon/Hill selected list of print books and journals for the small medical library - April 2001 & 2003 The Third Edition of this very popular book offers the most authoritative and comprehensive review of the impact of the HIV disease in infants, children, and adolescents.

Author: Kalliopi A. Roubelakis-Angelakis
Publisher: Springer Science & Business Media
ISBN: 9401723087
Category : Science
Languages : en
Pages : 486

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Book Description
Grapevine is one of the major cultivated plant crops. As with most woody plant species, molecular biology and biotechnology have progressed at a slow pace, due to several obstacles which have had to be overcome. However, substantial progress has now been made and useful information has been accumulated in the literature; numerous genes have been characterized from grapevine and significant progress has been made in the molecular and non-molecular biotechnological applications. In an effort to collect and present the state of the art on grapevine molecular biology and biotechnology, 41 scientists from 12 countries worked jointly on the preparation of this book. It is intended as a reference book for viticulturists, graduate and undergraduate students, biotechnological companies, and any scientist who is interested in molecular biology and biotechnology of plants with emphasis on grapevine.

Author: Joseph Jez
Publisher: ASA-CSSA-SSSA
ISBN: 9780891181682
Category : Science
Languages : en
Pages : 362

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Book Description
Sulfur forms and cycling processes in soil and their relationship to sulfur fertility / Jeff J. Schoenau and Sukhdev S. Malhi -- Sulfur nutrition of crops in the Indo-Gangetic plains of South Asia / M.P.S. Khurana, U.S. Sandana and Bijay-Singh -- Soil sulfur cycling temperate agricultural systems / Jørgen Eriksen -- History of sulfur deficiency in crops / Silvia Haneklaus, Elke Bloem and Ewald Schnug -- Availability of sulfur to crops from soil and other sources / Warren A. Dick, David Kost and Liming Chen -- Sulfur and cysteine metabolism / Rainer Hoefgen and Holger Hesse -- Sulfur response based on crop, source, and landscape position / Dave Franzen and Cynthia A. Grant -- Sulfur management for soybean production / Kiyoko Hitsuda [and others] -- Sulfur in a fertilizer program for corn / George W. Rehm and John G. Clapp -- Sulfur nutrition and wheat quality / Hamid A. Naeem -- Sulfur and marketable yield of potato / Alexander D. Pavlista -- Sulfur, its role in onion production and related alliums / George E. Boyhan -- Sulfur and the production of rice in wetland and dryland ecosystems / Richard W. Bell -- Evaluation of the relative significance of sulfur and other essential mineral elements in oilseed rape, cereals, and sugar beet production / Ewald Schnug and Silvia Haneklaus -- Improving the sulfur-containing amino acids of soybean to enhance its nutritional value in animal feed / Hari B. Krishnan -- Methionine metabolism in plants / Rachel Amir and Yael Hacham -- Plant sulfur compounds and human health / Joseph M. Jez and Naomi K. Fukagawa -- A future crop biotechnology view of sulfur and selenium / Muhammad Sayyar Khan and Rüdiger Hell.

Author: Hugh MacPherson (Ph. D.)
Publisher:
ISBN: 9780443050497
Category : Medical
Languages : en
Pages : 482

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Book Description
Written by THE leading lights in the field of integrating acupuncture into a Western medical system, this book bridges the gap between the theoretical foundations of acupuncture and its application in a modern Western clinical context. Each case history focuses on the complexities and dilemmas of treatment that are tackled, providing valuable insights by experienced practitioners into the management of a course of acupuncture treatment.

Author: Bijay K. Singh
Publisher: CRC Press
ISBN: 1482270064
Category : Medical
Languages : en
Pages : 636

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Book Description
Covers the basic knowledge of the regulation of biosynthesis of various amino acids in plants and the application of this knowledge to the discovery of novel inhibitors of amino acid biosynthesis and for enhancing the nutritional value of plant products. Provides an exhaustive list of pathway inhibitors.