Biochemistry and Cell Biology PDF Download

Author:
Publisher:
ISBN:
Category : Biochemistry
Languages : en
Pages : 616

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Author: Mahmoud Massoud
Publisher: Springer Science & Business Media
ISBN: 3540272801
Category : Science
Languages : en
Pages : 1132

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Thermofluids, while a relatively modern term, is applied to the well-established field of thermal sciences, which is comprised of various intertwined disciplines. Thus mass, momentum, and heat transfer constitute the fundamentals of th- mofluids. This book discusses thermofluids in the context of thermodynamics, single- and two-phase flow, as well as heat transfer associated with single- and two-phase flows. Traditionally, the field of thermal sciences is taught in univer- ties by requiring students to study engineering thermodynamics, fluid mechanics, and heat transfer, in that order. In graduate school, these topics are discussed at more advanced levels. In recent years, however, there have been attempts to in- grate these topics through a unified approach. This approach makes sense as thermal design of widely varied systems ranging from hair dryers to semicond- tor chips to jet engines to nuclear power plants is based on the conservation eq- tions of mass, momentum, angular momentum, energy, and the second law of thermodynamics. While integrating these topics has recently gained popularity, it is hardly a new approach. For example, Bird, Stewart, and Lightfoot in Transport Phenomena, Rohsenow and Choi in Heat, Mass, and Momentum Transfer, El- Wakil, in Nuclear Heat Transport, and Todreas and Kazimi in Nuclear Systems have pursued a similar approach. These books, however, have been designed for advanced graduate level courses. More recently, undergraduate books using an - tegral approach are appearing.

Author: D.N. Rutledge
Publisher: Elsevier
ISBN: 0080541208
Category : Science
Languages : en
Pages : 567

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Signal analysis and signal treatment are integral parts of all types of Nuclear Magnetic Resonance. In the last ten years, much has been achieved in the development of dimensional spectra. At the same time new NMR techniques such as NMR Imaging and multidimensional spectroscopy have appeared, requiring entirely new methods of signal analysis. Up until now, most NMR texts and reference books limited their presentation of signal processing to a short introduction to the principles of the Fourier Transform, signal convolution, apodisation and noise reduction. To understand the mathematics of the newer signal processing techniques, it was necessary to go back to the primary references in NMR, chemometrics and mathematics journals. The objective of this book is to fill this void by presenting, in a single volume, both the theory and applications of most of these new techniques to Time-Domain, Frequency-Domain and Space-Domain NMR signals. Details are provided on many of the algorithms used and a companion CD-ROM is also included which contains some of the computer programs, either as source code or in executable form. Although it is aimed primarily at NMR users in the medical, industrial and academic fields, it should also interest chemometricians and programmers working with other techniques.

Author: R. M. M. Crawford
Publisher:
ISBN:
Category : Buds
Languages : fr
Pages : 1070

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Jorge y Berto han creado un monstruo, la Supermujer Macroelâastica. Con la ayuda de sus horripilantes robots y su horrendo moäno, la Supermujer estâa dispuesta a apoderarse del mundo y administrarle un golpe a todo el que se interponga en su camino-- incluido el Capitâan Calzoncillos.

Author: Société française de physique
Publisher:
ISBN:
Category : Dislocations in crystals
Languages : fr
Pages : 292

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Author: YANNICK.. MILLOT
Publisher:
ISBN:
Category :
Languages : fr
Pages : 500

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CETTE THESE A POUR OBJET L'ETUDE DE NOUVELLES APPLICATIONS DES NOYAUX QUADRUPOLAIRES EN RMN. NOUS AVONS QUANTIFIE LE GRADIENT DE CHAMP ELECTRIQUE (GCE) DANS LA ZEOLITHE Y AVEC TROIS METHODES. DEUX D'ENTRE ELLES UTILISENT LE 1 3 1XE, CELUI-CI ETANT AFFECTE PAR LE RINGING DE LA SONDE, NOUS AVONS CHERCHE UNE SEQUENCE D'IMPULSIONS CAPABLE DE L'ELIMINER. CES METHODES ONT ETE APPLIQUEES SUR DES ZEOLITHES Y DESALUMINEES AVEC VAPEUR D'EAU, AINSI QU'AUX ZEOLITHES ECHANGEES AUX LANTHANES. LA PREMIERE METHODE SE FONDE SUR LA DIFFERENCE DES DEPLACEMENTS CHIMIQUES DU 1 3 1XE ET DU 1 2 9XE, CETTE DIFFERENCE EST PROPORTIONNELLE AU CARRE DU GCE. LA DEUXIEME METHODE EST BASEE SUR LA NUTATION DU 1 3 1XE ; NOUS AVONS MIS AU POINT UN PROGRAMME INFORMATIQUE, A L'AIDE DUQUEL NOUS DETERMINONS LA VALEUR DU GCE PAR AJUSTEMENT DE L'INTEGRALE DE LA RAIE AVEC SON EXPRESSION THEORIQUE. LA TROISIEME METHODE UTILISE LE MQ-MAS (MULTIPLE-QUANTUM MAGIC-ANGLE-SPINNING) QUI NOUS A PERMIS DE DETERMINER LE GCE DES DIFFERENTS ENVIRONNEMENTS DES ATOMES D'ALUMINIUM DANS DES ZEOLITHES Y DESALUMINEES (AVEC ET SANS VAPEUR D'EAU). A PARTIR DE L'ETUDE APPROFONDIE DE CETTE SEQUENCE, NOUS AVONS MIS EN EVIDENCE LES LIENS EXISTANT ENTRE LE SPIN ETUDIE, LE CYCLE DE PHASE ET LE TRAITEMENT DES DONNEES EXPERIMENTALES. DE PLUS, NOUS PROPOSONS UNE NOUVELLE CONVENTION POUR LA GRADUATION DE L'AXE F1 D'UN SPECTRE A DEUX DIMENSIONS ET NOUS APPORTONS UNE SOLUTION AUX PROBLEMES DE REPLIEMENTS DES RAIES D'UN SPECTRE MQ-MAS. LA RMN UTILISE CONSTAMMENT LA ROTATION A TRAVERS LA PRECESSION, LA NUTATION, LES CHANGEMENTS DE REFERENTIEL NOUS AVONS TRAITE LA ROTATION DE FACON CLASSIQUE ET QUANTIQUE, ET PLUS PARTICULIEREMENT LA MATRICE ROTATION DE WIGNER QUI PEUT ETRE UTILISEE LORSQUE L'INTERACTION QUADRUPOLAIRE EST EXPRIMEE SOUS FORME DE TENSEURS SPHERIQUES IRREDUCTIBLES. NOUS DONNONS LES DIFFERENTES FORMES DE CETTE MATRICE EN FONCTION DES CONVENTIONS CHOISIES.

Author: John K. Vennard
Publisher: Read Books Ltd
ISBN: 1446547817
Category : Science
Languages : en
Pages : 356

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Book Description
Fluid mechanics is the study under all possible conditions of rest and motion. Its approaches analytical, rational, and mathematical rather than empirical it concerns itself with those basic principles which lead to the solution of numerous diversified problems, and it seeks results which are widely applicable to similar fluid situations and not limited to isolated special cases. Fluid mechanics recognizes no arbitrary boundaries between fields of engineering knowledge but attempts to solve all fluid problems, irrespective of their occurrence or of the characteristics of the fluids involved. This textbook is intended primarily for the beginner who knows the principles of mathematics and mechanics but has had no previous experience with fluid phenomena. The abilities of the average beginner and the tremendous scope of fluid mechanics appear to be in conflict, and the former obviously determine limits beyond which it is not feasible to go these practical limits represent the boundaries of the subject which I have chosen to call elementary fluid mechanics. The apparent conflict between scope of subject and beginner ability is only along mathematical lines, however, and the physical ideas of fluid mechanics are well within the reach of the beginner in the field. Holding to the belief that physical concepts are the sine qua non of mechanics, I have sacrificed mathematical rigor and detail in developing physical pictures and in many cases have stated general laws only without numerous exceptions and limitations in order to convey basic ideas such oversimplification is necessary in introducing a new subject to the beginner. Like other courses in mechanics, fluid mechanics must include disciplinary features as well as factual information the beginner must follow theoretical developments, develop imagination in visualizing physical phenomena, and be forced to think his way through problems of theory and application. The text attempts to attain these objectives in the following ways omission of subsidiary conclusions is designed to encourage the student to come to some conclusions by himself application of bare principles to specific problems should develop ingenuity illustrative problems are included to assist in overcoming numerical difficulties and many numerical problems for the student to solve are intended not only to develop ingenuity but to show practical applications as well. Presentation of the subject begins with a discussion of fundamentals, physical properties and fluid statics. Frictionless flow is then discussed to bring out the applications of the principles of conservation of mass and energy, and of impulse-momentum law, to fluid motion. The principles of similarity and dimensional analysis are next taken up so that these principles may be used as tools in later developments. Frictional processes are discussed in a semi-quantitative fashion, and the text proceeds to pipe and open-channel flow. A chapter is devoted to the principles and apparatus for fluid measurements, and the text ends with an elementary treatment of flow about immersed objects.

Author: Richard T. Lahey
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 658

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This edition of the classic monograph gives a comprehensive overview of the thermal-hydraulic technology underlying the design, operation, and safety assessment of boiling water reactors. In addition, new material on pressure suppression containment technology is presented.

Author: K. Sherwin
Publisher: Springer Science & Business Media
ISBN: 9401115141
Category : Science
Languages : en
Pages : 319

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As the title implies, this book provides an introduction to thermodynamics for students on degree and HND courses in engineering. These courses are placing increased emphasis on business, design, management, and manufacture. As a consequence, the direct class-time for thermodynamics is being reduced and students are encouraged to self learn. This book has been written with this in mind. The text is brief and to the point, with a minimum of mathematical content. Each chapter defines a list of aims and concludes with a short summary. The summary provides an overview of the key words, phrases and equations introduced within the chapter. It is recognized that students see thermodynamics as a problem-solving activity and this is reflected by the emphasis on the modelling of situations. As a guide to problem solving, worked examples are included throughout the book. In addition, students are encouraged to work through the problems at the end of each chapter, for which outline solutions are provided. There is a certain timelessness about thermodynamics because the funda mentals do not change. However, there is currently some debate over which sign convention should apply to work entering, or leaving, a thermodynamic system. I have retained the traditional convention of work out of a system being positive. This fits in with the concept of a heat engine as a device that takes in heat and, as a result, produces positive work.

Author: Claudia Gomes de Morais
Publisher:
ISBN:
Category :
Languages : fr
Pages : 131

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Dans cette thèse, la technique RMN haute résolution MQMAS est détaillée et les méthodes les plus prometteuses pour améliorer son efficacité sont discutées. En particulier, l'amélioration obtenue avec la méthode FAM est étudiée dans des matériaux contenant des noyaux de spin I=3/2, 5/2, 7/2 et 9/2. De plus, une nouvelle stratégie d'optimisation de cette méthode, qui améliore son efficacité, est proposée. Une alternative pour obtenir des spectres RMN haute-résolution de noyaux quadripolaires de spin demi-entier est la technique STMAS. Une méthode dérivée de cette dernière, la technique I-STMAS, est proposée et son implementation, son efficacité ainsi que son application sont comparées aux méthodes MQMAS et STMAS. Bien que plus efficaces que le MQMAS et permettant l'obtention de spectres quasi quantitatifs, nous montrons que le STMAS et le I-STMAS sont plus difficiles à mettre en œuvre et ont d'importantes limitations qui restreignent leur application. Les techniques haute-résolution double-résonance CP MQMAS et HETCOR MQMAS sont également décrites. La combinaison des méthodes MQMAS et HETCOR est présentée pour des noyaux de spin I=5/2 et nous montrons qu'elle est très utile pour l'étude, dans des conditions haute-résolution, des corrélations structurales dans des systèmes contenant des noyaux quadripolaires. Enfin, nous montrons que le découplage 27Al à faible puissance peut être utilisé pour éliminer les interactions résiduelles de couplage J entre 31P et 27Al dans certains aluminophosphates. Ceci améliore la résolution des spectres 31P MAS et de corrélation homonucléaire et des spectres 31P/27Al HETCOR MQMAS, permettant l'obtention d'informations structurales.