Contribution à l'étude des interactions moléculaires entre solutés organiques PDF Download
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Author: Makabu Wa Lufuta Kande
Publisher:
ISBN:
Category :
Languages : fr
Pages : 254
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Author: Makabu Wa Lufuta Kande
Publisher:
ISBN:
Category :
Languages : fr
Pages : 254
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Author: P.. CLAVERIE
Publisher:
ISBN:
Category :
Languages : fr
Pages :
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ORIGINE DE L'INSUFFISANCE DU TRAITEMENT PAR LA METHODE DE PERTURBATION RAYLEIGH-SCHROEDINGER DES INTERACTIONS A FAIBLE DISTANCE. CONSTRUCTION D'UN DEVELOPPEMENT DE PERTURBATION DONNANT L'ENERGIE D'INTERACTION PHYSIQUE A FAIBLE DISTANCE: PROBLEME DES CONTRAINTES DE SYMETRIE IMPOSEES A LA FONCTION PERTURBEE FINALE, TRAITEMENTS DE PERTURBATION DITS "D'ECHANGE". RECHERCHE DE FORMULES SIMPLIFIEES PERMETTANT D'EVALUER LES DIVERSES CONTRIBUTIONS A L'ENERGIE D'INTERACTION: TERMES A COURTE PORTEE DU 1ER ORDRE (REPULSION D'ECHANGE) ET A LONGUE PORTEE DU 1ER ORDRE (ELECTROSTATIQUE) ET DU 2EME ORDRE (POLARISATION ET DISPERSION). EXEMPLES D'APPLICATION: PAIRES DE BASES ET STRUCTURE HELICOIDALE DE L'ADN, INTERACTIONS ENTRE TRIPLETS DE BASES DE L'ARN ET RECONNAISSANCE CODON-ANTICODON, ETC
Author: André Weisbecker
Publisher:
ISBN:
Category :
Languages : fr
Pages : 120
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Book Description
L'étude des interactions moléculaires, dans l'état liquide, peut être abordée de diverses méthodes physico-chimiques ; celles de la thermodynamique apportent un point de vue énergétique tandis que l'étude des structures est plus spécialement du ressort des spéctrométries et de la résonnance magnétique nucléaire. Dans le domaine diélectrique, différentes voies de recherche ont été ouvertes : elles sont principalement basées sur les théories de Debye et de Onsager. [...] Nous allons développer une méthode d'investigation par voie diélectrique, basée sur la théorie d'Onsager, qui, sous sa forme classique, est exposée dans de nombreux ouvrages et dont nous avons proposé une modification.
Author: Gérard Vassent
Publisher:
ISBN:
Category :
Languages : fr
Pages : 171
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Author: Carsten Reinhardt
Publisher: John Wiley & Sons
ISBN: 3527612742
Category : Science
Languages : en
Pages : 297
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Chemistry in the last century was characterized by spectacular growth and advances, stimulated by revolutionary theories and experimental breakthroughs. Yet, despite this rapid development, the history of this scientific discipline has achieved only recently the status necessary to understand the effects of chemistry on the scientific and technological culture of the modern world. This book addresses the bridging of boundaries between chemistry and the other "classical" disciplines of science, physics and biology as well as the connections of chemistry to mathematics and technology. Chemical research is represented as an interconnected patchwork of scientific specialties, and this is shown by a mixture of case studies and broader overviews on the history of organic chemistry, theoretical chemistry, nuclear- and cosmochemistry, solid state chemistry, and biotechnology. All of these fields were at the center of the development of twentieth century chemistry, and the authors cover crucial topics such as the emergence of new subdisciplines and research fields, the science-technology relationship, and national styles of scientific work. This monograph represents a unique treasure trove for general historians and historians of science, while also appealing to those interested in the theoretical background and development of modern chemistry.
Author: Montenay-Carestier therese
Publisher:
ISBN:
Category :
Languages : fr
Pages : 84
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Book Description
RAPPELS SUR LES MODIFICATIONS SPECTRALES DUES AUX INTERACTIONS INTERMOLECULAIRES. ETUDE DE LA STRUCTURE DES AGREGATS FORMES EN SOL. AQUEUSE CONGELEE, DES INTERACTIONS INTERMOLECULAIRES DANS CES AGREGATS ET DES TRANSFERTS D'ENERGIE QUI EN DECOULENT. COMPARAISON DES PROPRIETES SPECTROSCOPIQUES DES AGREGATS DE NUCLEOSIDES A CELLES DES POLYNUCLEOTIDES. ETUDE DES INTERACTIONS MOLECULAIRES EN SOL. CONGELEES ENTRE NUCLEOSIDES ET TRYPTOPHANE, TYROSINE ET HISTIDINE, ET EN MILIEU FLUIDE A T ORDINAIRE ENTRE NUCLEOSIDES ET TRYPTOPHANE (PAR ABSORPTION) ET ENTRE TRYPTAMINE, SEROTONINE, TYRAMINE ET ACIDES NUCLEIQUES (PAR FLUORESCENCE)
Author: Odilon Chalvet
Publisher: Springer Science & Business Media
ISBN: 9401014566
Category : Science
Languages : en
Pages : 470
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Book Description
The second volume of the proceedings of the international seminar devoted to locali· zation and delocalization in quantum chemistry is divided into four parts. The first one is mainly concerned with the localizability of electrons in ionized and exited states. The second part shows how is it possible to take advantage of the localizability of electrons to compute molecular wave-functions. The third part of the book is an homogeneous analysis of the electronic collective excitation and of the motion of excitons in organic solids. The last section is devoted to the study of the role of electron localizability in the chemical reactivity of molecules. Concluding remarks are concerned with a careful analysis of the localizability concept itself in relation with a possible interpretation of the wave-mechanics. PART I ELECTRON LOCALIZATION IN IONIZED AND EXCITED STATES APPLICATIONS OF PAIR DENSITY ANALYSIS R. CONSTANCIEL and L. ESNAULT Centre de Mecanique Ondulatoire Appliquee, Paris, France Abstract. The method of pair density analysis is applied to various kinds of calculations. We examine the influence of the quality of the wavefunction and of the nuclear configuration; the problem of hybridization is discussed, as weIl as the relations between separability and excitation.
Author: J.-L. Sebedio
Publisher: The American Oil Chemists Society
ISBN: 9780935315592
Category : Lipids
Languages : en
Pages : 404
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Book Description
This book should prove a valuable resource for food scientists, chemists, researchers, technicians, quality assurance persons, and those who wish to acquire a working knowledge of lipid analysis.
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 634
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Author:
Publisher:
ISBN:
Category : Physics
Languages : en
Pages : 360
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