Download or read book Spectroscopie et cin tique de radicaux d int r t atmosph rique produits par photolyse laser written by Bruno Delcroix and published by . This book was released on 1998 with total page 314 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dans le cadre du centre d'etudes et de recherches lasers et applications, deux equipes du laboratoire de spectroscopie hertzienne et du laboratoire de cinetique et chimie de la combustion ont decide de reunir leurs competences tant en spectroscopie qu'en cinetique pour developper un projet de recherche commun. Celui-ci a pour objet l'etude de radicaux, en particulier ceux qui peuvent intervenir dans les processus chimiques complexes du milieu atmospherique. Les informations obtenues en laboratoire permettront d'etablir des modeles utilises en chimie atmospherique. L'etude et le developpement d'un dispositif de photolyse laser uv/ detection resolue dans le temps dans le domaine des frequences (sub)millimetriques ont ete realises dans le cadre de ce travail. La mise au point de ce systeme a ete realisee par l'etude du radical so produit par photolyse laser de cl#2so a 193 nm. Les spectres de rotation pure de l'etat electronique fondamental et des deux premiers etats excites ont ete mesures jusque 936 ghz, dans des etats vibrationnellement excites jusque v=17. Les resultats d'une etude portant sur un radical d'interet atmospherique, ch#3o, produit par photolyse laser de ch#3ono, sont presentes. Deux types d'experiences ont ete entreprises : une etude spectroscopique dans le domaine submillimetrique et une etude cinetique, avec suivi du radical par fluorescence induite par laser. La reaction avec no a ete etudiee a temperature ambiante dans la gamme de pression 14-510 torr et a quelques pressions dans la gamme de temperature 13-91 c. Une premiere determination directe des expressions d'arrhenius (13

Download or read book Compost Science and Technology written by L.F. Diaz and published by Elsevier. This book was released on 2011-07-29 with total page 381 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composting is a widely used biological process for the management of some wastes produced in communities and agricultural activities, which have experienced substantial growth during the last few years. Because this and the knowledge of composting has increased, the number of composting facilities has increased tremendously, especially in some European countries. Interest has also increased in several countries in other regions of the world. Compost Science and Technology attempts to summarize some of the most important work conducted during the last few years under one cover. The contributions to the publication are made by some of the most qualified professionals in the world and present the information in a clear and objective manner. The readers will find the information very useful and will be helpful in the design of new facilities and organic recycling programs. The manager or interested member of the community does not have to have a rigorous training in science or technology. - Up-to-date contributions by some of the most knowledgeable and respected leaders in the field - Clear and objective presentations, which are arranged in such a way that it is not necessary to read the entire book - Information is supported by data, tables and references - Covers most important aspects of the process including a brief historical review - May be used by teachers as well as practicioners in the field