Download or read book ETUDE DU LASER XECL PHOTO DECLENCHE PAR RAYONS X written by RUDIMAR.. RIVA and published by . This book was released on 1993 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: CE TRAVAIL CONCERNE L'ETUDE EXPERIMENTALE ET THEORIQUE D'UN LASER XECL PHOTO-DECLENCHE PAR RAYONS X. CETTE ETUDE, EFFECTUEE SUR UNE LARGE GAMME DE PARAMETRES DE FONCTIONNEMENT, EST BASEE SUR LA MESURE DES PARAMETRES ELECTRIQUES, DES CARACTERISTIQUES DE L'EMISSION LASER ET DE L'EVOLUTION TEMPORELLE DES DENSITES EN ESPECES EXCITEES PRESENTES DANS LE MILIEU ACTIF. UN MODELE, COUPLANT LA RESOLUTION DE L'EQUATION DE BOLTZMANN A LA CINETIQUE PHYSICO-CHIMIQUE DU LASER, A L'EVOLUTION DES PARAMETRES ELECTRIQUES ET DU CHAMP LASER, A ETE ELABORE SANS HYPOTHESE A PRIORI SUR LA DISTRIBUTION VIBRATIONNELLE DES ETATS DE L'AUGMENTATION DE LA TEMPERATURE SUR LES SECTIONS EFFICACES D'EMISSION STIMULEE ET D'ABSORPTION. L'ETUDE DE L'EQUILIBRE IONISATION-ATTACHEMENT A PERMIS DE METTRE EN EVIDENCE LE ROLE DE L'EXCITATION VIBRATIONNELLE DE LA MOLECULE HCL DANS LA PRODUCTION DES IONS CL# ET DE RESOUDRE LA CONTROVERSE ASSOCIEE AU NOMBRE DE NIVEAUX DE VIBRATION DEVANT ETRE INCLUS DANS UN MODELE DU LASER XECL. NOUS AVONS DETERMINE LES LOIS D'ECHELLE CONCERNANT LA TENSION A APPLIQUER POUR AVOIR LE SEUIL D'EMISSION LASER, LE MEILLEUR RENDEMENT OU L'ENERGIE MAXIMALE EXTRAITE. LES PERFORMANCES OBTENUES: 7,6 J/1,9 MW DE PUISSANCE CRETE, RENDEMENT MAXIMUM DE 3,5%, CONFIRMENT L'APTITUDE DES DECHARGES PHOTO-DECLENCHEES A LA REALISATION DE LASERS DE PUISSANCE. POUR DES CHAMPS INITIAUX TRES ELEVES, NOUS AVONS OBSERVE PAR SPECTROSCOPIE D'ABSORPTION LASER, UNE REMONTEE BRUTALE DE LA CONCENTRATION EN ESPECES ATOMIQUES EXCITEES, EN COINCIDENCE AVEC LA FIN DE L'EMISSION LASER. CE PHENOMENE EST ATTRIBUE AU DEVELOPPEMENT D'UNE INSTABILITE DE DECHARGE DONT L'ETUDE SYSTEMATIQUE POURRAIT CONSTITUER LE PROLONGEMENT DE CE TRAVAIL

Download or read book UVX 94 written by Jean-Michele Pouvesle and published by . This book was released on 1994 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Plant Cell Wall written by Zoë Popper and published by Humana Press. This book was released on 2011-01-12 with total page 310 pages. Available in PDF, EPUB and Kindle. Book excerpt: The cell wall and its constituent polysaccharides and proteins control nearly all plant-based biological and biophysical processes. Understanding the cell wall is, therefore, not only fundamental to the plant sciences but is also pertinent to aspects of human and animal nutrition and health as well as plant-microbe and plant-animal interactions. In The Plant Cell Wall: Methods and Protocols, experts in the field describe detailed methods which are currently being applied to investigate the many aspects of the plant cell wall including its structure, biochemical composition, and metabolism. The book delves into a range of techniques involving plant tissue culture, which can be applied to investigating cell wall structure and metabolism, methods directed towards structural analysis and occurrence of carbohydrates, the development and use of microscopy-based tools and techniques, procedures which measure the physical properties of the wall, and methods based on the application of molecular genetic approaches. Written in the successful Methods in Molecular BiologyTM series format, chapters include introductions to their respective topics, lists of the necessary materials and reagents, step-by-step, readily reproducible protocols, and notes on troubleshooting and avoiding known pitfalls. Authoritative and easily accessible, The Plant Cell Wall: Methods and Protocols seeks to serve both professionals and novices with its well-honed methodologies in an effort to further our knowledge of this essential cellular feature.