Download or read book Effet des diff rents alcalins sur le composite fer cobalt carbone en synth se d hydrocarbures written by Nadjia Bouslimane and published by . This book was released on 1992 with total page 182 pages. Available in PDF, EPUB and Kindle. Book excerpt: LE DEPOT DE CARBONE PAR DISMUTATION DE SON MONOXYDE AU CONTACT DU FER, DU COBALT, DU NICKEL OU DE LEURS ALLIAGES CONDUIT A DES COMPOSITES METAL-CARBONE DONT L'ACTIVITE CATALYTIQUE EN SYNTHESE DE FISCHER ET TROPSCH A ETE PRECEDEMMENT ETUDIEE. LE BUT DE CETTE THESE ETAIT D'EXAMINER L'AUGMENTATION DU RENDEMENT EN ALCENES LEGERS (PAR L'INTERMEDIAIRE DE L'ACTIVITE OU DE LA SELECTIVITE) LORSQUE DIFFERENTS CARBONATES ALCALINS SONT AJOUTES AU COMPOSITE COMPORTANT LES MEMES MASSES DE FER ET DE COBALT. L'ACTIVITE CATALYTIQUE ET LE RENDEMENT AUGMENTENT PAR ADDITION DE CARBONATES ET CECI D'AUTANT PLUS, A MEME MASSE D'ALCALIN, QUE SON NUMERO ATOMIQUE EST ELEVE. LA SELECTIVITE EN ALCENES LEGERS AUGMENTE, ELLE AUSSI, PAR ADDITION DE CARBONATE ALCALIN MAIS SANS ORDRE CLAIR ENTRE CES ELEMENTS. LE SODIUM AUGMENTE FORTEMENT LE DEPOT DE CARBONE ET LE CESIUM LA PRODUCTION DE METHANE SI BIEN QUE LE POTASSIUM ET LE RUBIDIUM SONT LES MEILLEURS PROMOTEURS DE LA PRODUCTION D'ALCENES LEGERS. TOUTES CES MESURES ONT ETE EFFECTUEES SUR DES CATALYSEURS STABILISES APRES UNE PERIODE D'ACTIVATION IN SITU (OU LA DISPERSION DES METAUX SE POURSUIT) ET AVANT LEUR EMPOISONNEMENT (DU MOINS DANS LE CAS DU CATALYSEUR NON PROMU). LES MICROANALYSES PAR EMISSION X CONDUITES LORS DES OBSERVATIONS EN MICROSCOPIE ELECTRONIQUE A BALAYAGE PAR TRANSMISSION DES CATALYSEURS STABILISES ONT MONTRE QUE LES ALCALINS ETAIENT PRINCIPALEMENT SITUES SUR LE CARBONE

Download or read book External Trade Statistics written by Statistical Office of the European Communities and published by . This book was released on 1982 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer. This book was released on 1976 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis· seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) *at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac· tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 20 (thesis year 1975) a total of 10,374 theses titles from 28 Canadian and 239 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. The organization of Volume 20 is identical to that of past years. It consists of theses titles arranged by discipline and by university within each discipline.

Download or read book Analytical Tables of Foreign Trade written by European Communities Staff and published by . This book was released on 1988-11 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Unsteady Transonic Flow written by Mårten T. Landahl and published by Courier Dover Publications. This book was released on 2019-04-17 with total page 147 pages. Available in PDF, EPUB and Kindle. Book excerpt: This classic monograph on unsteady transonic flow — the flow of air encountered at speeds at or near the speed of sound — is of continuing interest to students and professionals in aerodynamics, fluid dynamics, and other areas of applied mathematics. After a brief Introduction, Swedish physicist Mårten T. Landahl presents a chapter in which the two-dimensional solution is derived, succeeded by a discussion of its relation to the subsonic and supersonic solutions. Three chapters on low aspect ratio configurations follow, covering triangular wings and similar planforms with curved leading edges, rectangular wings, and cropped delta wings, and low aspect ratio wing-body combinations. The treatment concludes with a consideration of the experimental determination of air forces on oscillating wings at transonic speeds.

Download or read book The U S Sheep Industry written by Richard P. Stillman and published by . This book was released on 1990 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Loose Leaf for Principles of Biology written by Robert Brooker and published by McGraw-Hill Education. This book was released on 2020-01-07 with total page 1136 pages. Available in PDF, EPUB and Kindle. Book excerpt: Principles of Biology is reflective of the shift taking place in the majors biology course from large and detail rich to short and conceptual, with a focus on new, cutting-edge science. A succinct and inviting text focused on central concepts, Principles of Biology helps students connect fundamental principles while challenging them to develop and hone critical thinking skills.