ETUDE A BASSE TEMPERATURE DES BANDES D'ABSORPTION INFRA-ROUGE DUES AUX DEFAUTS DANS LE SILICIUM IRRADIE AUX NEUTRONS PDF Download
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Book Description
ETUDE SYSTEMATIQUE DES CONDITIONS D'OBSERVATION DES BANDES A 0,343 EV-0,359 EV ET 0,375 EV. IDENTIFICATION DU DEFAUT A L'ORIGINE DE CES DERNIERES TRANSITIONS. COMPREHENSION DU COMPORTEMENT DE LA DILACUNE EN ABSORPTION INFRAROUGE
Book Description
ETUDE SYSTEMATIQUE DES CONDITIONS D'OBSERVATION DES BANDES A 0,343 EV-0,359 EV ET 0,375 EV. IDENTIFICATION DU DEFAUT A L'ORIGINE DE CES DERNIERES TRANSITIONS. COMPREHENSION DU COMPORTEMENT DE LA DILACUNE EN ABSORPTION INFRAROUGE
Book Description
LA PHOTOCHIMIE UV DE QUINONES (UBIQUINONES, NAPHTOQUINONES ET PLASTOQUINONES) A ETE ETUDIEE PAR SPECTROSCOPIE D'ABSORPTION INFRAROUGE DIFFERENTIELLE A TRANSFORMEE DE FOURIER. L'IRRADIATION A BASSE TEMPERATURE (10 K) DES DIFFERENTES QUINONES A PERMIS DE METTRE EN EVIDENCE LA GENERATION DE BIRADICAUX (DETECTES PAR SPECTROSCOPIE RPE). CES BIRADICAUX NE SONT GENERES QUE POUR LES QUINONES POSSEDANT UNE CHAINE NON SATUREE. L'UTILISATION DE QUINONES MARQUEES A L'ISOTOPE #1#8O SUR LEURS GROUPES CARBONYLES REVELE LA PRESENCE DANS CES RADICAUX D'UN GROUPE OH, CE QUI INDIQUE QU'UN DES GROUPES CARBONYLES EST PROTONE. L'UTILISATION D'UBIQUINONES MARQUEES A L'ISOTOPE #1#3C SUR L'UN OU SUR L'AUTRE DES DEUX GROUPES CARBONYLES A PERMIS DE DEMONTRER LE MECANISME DE GENERATION DE CES RADICAUX. CE PROCESSUS EST UN TRANSFERT D'ATOME D'HYDROGENE INTRAMOLECULAIRE DE LA CHAINE NON SATUREE VERS L'OXYGENE DU GROUPE CARBONYLE LE PLUS PROCHE. LES BIRADICAUX AINSI GENERES SONT CONSTITUES PAR LE RADICAL SEMIQUINONE PROTONE QH#? ET UN RADICAL SUR LA CHAINE NON SATUREE. BIEN QUE LES FREQUENCES D'ABSORPTION INFRAROUGE DES MODES D'ELONGATION DES GROUPES CARBONYLES DES PARABENZOQUINONES SOIENT EN GENERAL TRES PEU AFFECTEES PAR LA PRESENCE DE SOLVANTS, IL A ETE CEPENDANT MIS EN EVIDENCE UNE INFLUENCE IMPORTANTE DE LA PRESENCE D'ACIDES FORTS (ACIDE TRICHLORACETIQUE ET ACIDE DE LEWIS ALCL#3) SUR LES FREQUENCES DE CES MODES. LA PHOTOCHIMIE UV A BASSE TEMPERATURE (10 K) DE QUINONES EN PRESENCE D'ACIDE TRICHLORACETIQUE INDUIT UN TRANSFERT D'ATOME D'HYDROGENE INTERMOLECULAIRE DE L'ACIDE VERS L'UN DES GROUPES CARBONYLES. DES CALCULS DE CHIMIE QUANTIQUE SONT UTILISES AFIN D'ETUDIER LES EFFETS DES SUBSTITUANTS, DES MARQUAGES ISOTOPIQUES ET DES SOLVANTS SUR LES SPECTRES D'ABSORPTION INFRAROUGE DES DIFFERENTES QUINONES ETUDIEES, DANS LEURS DIFFERENTS ETATS (RADICALAIRE OU NON). EN PARTICULIER, L'ETUDE DES EFFETS SUR LES SPECTRES D'ABSORPTION INFRAROUGE DES MARQUAGES AU CARBONE #1#3C SUR L'UN OU SUR L'AUTRE DES DEUX GROUPES CARBONYLES A PERMIS DE DETERMINER L'ORIENTATION DES GROUPES METHOXYS PAR RAPPORT AU PLAN DU CYCLE QUINONIQUE DANS LES UBIQUINONES. LA COMPARAISON ENTRE LES EFFETS OBSERVES SUR LES SPECTRES D'ABSORPTION INFRAROUGE DES QUINONES IN VITRO (EFFETS DES ACIDES FORTS) ET IN VIVO DANS LE CENTRE REACTIONNEL PHOTOSYNTHETIQUE BACTERIEN, COUPLEE AUX CALCULS DE MODES NORMAUX ET A L'ANALYSE DE DONNEES CRISTALLOGRAPHIQUES, PERMET D'APPREHENDER LA NATURE POSSIBLE DES INTERACTIONS ENTRE LA QUINONE ET SON SITE PROTEIQUE. IL APPARAIT QUE LA DISTANCE ENTRE DEUX ATOMES REALISANT UNE LIAISON HYDROGENE N'EST PAS LE SEUL PARAMETRE A PRENDRE EN COMPTE POUR DETERMINER LA FORCE DE LA PERTURBATION INDUITE PAR LA PROTEINE SUR UN GROUPE CARBONYLE D'UNE QUINONE. D'AUTRES PARAMETRES, TELS QUE L'ORIENTATION DE LA LIAISON HYDROGENE PAR RAPPORT AU PLAN DU CYCLE QUINONIQUE, LA NATURE DES GROUPES DONNEURS SONT EGALEMENT A CONSIDERER
Author: Ahmed Belasri Publisher: Springer Nature ISBN: 9811554447 Category : Technology & Engineering Languages : en Pages : 659
Book Description
This book highlights peer reviewed articles from the 1st International Conference on Renewable Energy and Energy Conversion, ICREEC 2019, held at Oran in Algeria. It presents recent advances, brings together researchers and professionals in the area and presents a platform to exchange ideas and establish opportunities for a sustainable future. Topics covered in this proceedings, but not limited to, are photovoltaic systems, bioenergy, laser and plasma technology, fluid and flow for energy, software for energy and impact of energy on the environment.
Author: Agnes Buka Publisher: World Scientific ISBN: 1848167997 Category : Science Languages : en Pages : 299
Book Description
The book intends to give a state-of-the-art overview of flexoelectricity, a linear physical coupling between mechanical (orientational) deformations and electric polarization, which is specific to systems with orientational order, such as liquid crystals. Chapters written by experts in the field shed light on theoretical as well as experimental aspects of research carried out since the discovery of flexoelectricity. Besides a common macroscopic (continuum) description the microscopic theory of flexoelectricity is also addressed. Electro-optic effects due to or modified by flexoelectricity as well as various (direct and indirect) measurement methods are discussed. Special emphasis is given to the role of flexoelectricity in pattern-forming instabilities. While the main focus of the book lies in flexoelectricity in nematic liquid crystals, peculiarities of other mesophases (bent-core systems, cholesterics, and smectics) are also reviewed. Flexoelectricity has relevance to biological (living) systems and can also offer possibilities for technical applications. The basics of these two interdisciplinary fields are also summarized.
Author: Paolo Mele Publisher: ISBN: 9781536160864 Category : Zinc oxide thin films Languages : en Pages : 0
Book Description
Zinc oxide (ZnO) is an n-type semiconductor with versatile applications such as optical devices in ultraviolet region, piezoelectric transducers, transparent electrode for solar cells and gas sensors. This book "ZnO Thin Films: Properties, Performance and Applications" gives a deep insight in the intriguing science of zinc oxide thin films. It is devoted to cover the most recent advances and reviews the state of the art of ZnO thin films applications involving energy harvesting, microelectronics, magnetic devices, photocatalysis, photovoltaics, optics, thermoelectricity, piezoelectricity, electrochemistry, temperature sensing. It serves as a fundamental information source on the techniques and methodologies involved in zinc oxide thin films growth, characterization, post-deposition plasma treatments and device processing. This book will be invaluable to the experts to consolidate their knowledge and provide insight and inspiration to beginners wishing to learn about zinc oxide thin films.
Author: Wade H. Shafer Publisher: Springer ISBN: 9780306341205 Category : Science Languages : en Pages : 320
Book Description
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.
Author: Jean-Marie Basset Publisher: Wiley-VCH ISBN: 9783527319725 Category : Science Languages : en Pages : 725
Book Description
Covering everything from the basics to recent applications, this monograph represents an advanced overview of the field. Edited by internationally acclaimed experts respected throughout the community, the book is clearly divided into sections on fundamental and applied surface organometallic chemistry. Backed by numerous examples from the recent literature, this is a key reference for all chemists.
Author: David Adler Publisher: Springer Science & Business Media ISBN: 1489922601 Category : Science Languages : en Pages : 448
Book Description
The Institute for Amorphous Studies was founded in 1982 as the international center for the investigation of amorphous mate rials. It has since played an important role in promoting the und er standing of disordered matter in general. An Institute lecture series on "Fundamentals of Amorphous Materials and Devices" was held during 1982-83 with distinguished speakers from universities and industry. These events were free and open to the public ,and were attended by many representatives of the scientific community. The lectures themselves were highly successful inasmuch as they provided not only formal instruction but also an opportunity for vigorous and stimulating debate. That last element could not be captured within the pages of a book I but the lectures concentrated on the latest advances in the field I which is why their essential contents are he re reproduced in collective form. Together they constitute an interdisciplinary status report of the field. The speakers brought many different viewpoints and a variety of back ground experiences io bear on the problems involved I but though language and conventions vary I the essential unity of the concerns is very clear I as indeed are the ultimate benefits of the many-sided approach.
Author: FRANCELINE.. CARTON MERLET
Author: FRANCELINE.. CARTON MERLET
Author: Bassam Massarani
Author: JEAN-RENE.. BURIE
Author: Ahmed Belasri
Author: Agnes Buka
Author: Paolo Mele
Author: Wade H. Shafer
Author: Jean-Marie Basset
Author: David Adler
Author: Richard P. Stillman