Download or read book Etude exp rimentale d un r gime de combustion dilu e dans une configuration contre courant written by Philipp Bauer and published by . This book was released on 2006 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt: Un nouveau régime de combustion capable de réduire la formation des oxydes d’azote est étudié. Une flamme non prémélangée est stabilisée entre des réactifs dilués, préalablement chauffés et injectés séparément dans un brûleur à contre-courant. Un dispositif expérimental a été réalisé, avec pour paramètres de fonctionnement l’étirement aérodynamique, le taux de turbulence des jets opposés, la température de préchauffage et le taux de dilution dans l’azote des espèces réactives. La caractérisation aérothermochimique est effectuée au moyen de la PIV et de l’imagerie d’émission des radicaux OH* et CH*. Des algorithmes spécifiques de traitement des images et d’extraction des zones réactives ont été mis au point. L’influence des paramètres sur les propriétés de la flamme a été mesurée. Le domaine d’inflammabilité croît avec l’augmentation de la température et de la turbulence, mais se restreint avec celle de la dilution. Ces observations ont été reliées à l’épaisseur des zones chimiquement actives. La turbulence augmente le transport des espèces et rend la flamme, lorsque les réactifs sont préchauffés, plus robuste à l’extinction. L’augmentation de la température et de la turbulence conduit à une homogénéisation spatiale des propriétés de la flamme et de l’écoulement.
Download or read book Physical Control Methods in Plant Protection written by Charles Vincent and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Jointly published with INRA, Paris. Pesticide resistance is becoming more frequent and widespread with more than 500 insect species known to have become resistant to synthetic insecticides. On the other hand, consumers increasingly demand agricultural products without any pesticide residues. This book, for the first time, shows the alternative: solely physical methods for plant protection by means of thermal, electromagnetic, mechanical and vacuum processes. A glossary rounds up this extremely valuable book.
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 Rational Pesticide Use written by Keith Joseph Brent and published by Cambridge University Press. This book was released on 1987-09-17 with total page 366 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is growing concern among scientists, farmers and the general public that pesticides are being applied ever more widely but with less and less discretion. This book brings together a range of experts to discuss how crop protection chemicals can be used more rationally, so as to maximise benefits in yield and quality while minimising environmental and economic costs. The book is based on the ninth Long Ashton Symposium and is organised into four sections. The first, environment, examines to what extent current pesticide use is affecting the environment and human welfare, and what changes in practice are justified. The second, application, assesses progress in performance and safety in the use of pesticides, while the next section, resistance, looks at problems and shortcomings arising from the appearance of resistant strains of pests, and considers strategies for surmounting these difficulties. The final section, forecast and pest management, asks whether existing methods of assessing risks are acceptable and seeks ways of rending decision making in crop protection more rational.
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 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:
