springer vienna nov 2011 (27 risultati)

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The verrucarins and roridins are secondary metabolites of the soil fungi Myrothecium verrucaria (Albertini et Schweinitz) Ditmar ex Fries and Myrothecium roridum Tode ex Fries. The species Myrothecium belongs to the fungi imperfecti, order of Moniliales, family Tubercularia ceae (30, 17, 32). The distinction between these and other closely related fungal species is difficult. It has been studied and discussed by various authors (82, 16, 55, 75, 62, 43). Myrothecium species are parasitic on leaves of Gardenia, tomatoes, violets, kidney beans, snapdragons and other common plants. They are also found on decaying tissue and in soil. It was known earlier that cultures of the two species mentioned exhibit cellulolytic properties due to the presence of a very active cellulase which was used for the treatment of cellulose during the production of textiles [for leading references see (42, 66)]. The first investigation of the secondary metabolites of these micro organisms was carried out by BRIAN and MCGOWAN (16). They isolated a crystalline compound, designated as glutinosin and assigned the formula C4sH60016, from cultures of Metarrhizium glutinosum S. Pope, which in fact is a Myrothecium species (82, 55). Glutinosin exhibited anti fungal activity. Eight years later BOWDEN and SCHANTZ (14) described the isolation and characterization of a dermatitic or skinirritating crystal line compound melting at 38°, and possessing the formula C H 04, 1s 22 from culture filtrates of Myrothecium verrucaria. They suspected the presence of additional biologically active substances. 712 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -This supplement of Acta Neurochirurgica contains the proceedings of the Ninth Convention of the Academia Eurasiana Neurochirurgica held in Chateau St. Gerlach, Houthem, The Netherlands, 29 July - 1 August 1998. During this convention a three-day symposium on Neurosurgery and Medical Ethics was held. In this time of tremendous technical advancement in medicine in general and neurosurgery in particular, we are liable to lose sight of the sick patient as a human being, and the odds are that he will be the object rather than the subject of our action in the near future. It is a purpose and a task of the Academia Eurasiana Neurochirurgica to recognize this thread and to pay attention to tradition, morality and ethics in neurological surgery. The theme of this convention and the subject of the symposium met this purpose as no other. In the scientific sessions during the first day, the moral backgrounds of medical ethics in the most important cultures and religions in east and west were elucidated by invited experts in this field. A mutual respectful understanding of each other's conception of and belief in ethical principles is a growing necessity in our multicultural societies in both continents. On the second day, the ethical aspects of different fields of neurological surgery were discussed by members of the Academia. In this context, also the internationally much-discussed and much-criticized regulations on euthanasia in The Netherlands were explained. 112 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -There are two important reasons for publishing this new series entitled 'Advances and Technical Standards in Neurosurgery': 1. the lack of anyor ganized common European postgraduate training system for young neurosurgeons and 2. the language barriers, which impede the exchange of neurosurgical findings in Europe more than in other parts of the world. The fact that the English language is well on the way to becoming the international medium at European scientific conferences is a great asset in terms of mutual understanding. Therefore the Editors have decided to publish all contributions in English, regardless of the native language of the authors. All contributions are submitted to the entire editorial board before publi cation of any volume. Our series is not intended to compete with the publications of original scientific papers in other neurosurgical journals. Our intention is, rather, to present fields of neurosurgery and related areas in which important recent advances have been made. The contributions are written by specialists in the given fields and constitute the first part of each volume. In the second part of each volume, we publish detailed descriptions of standard operative procedures, furnished by experienced clinicians; in these articles the authors describe the techniques they employ and explain the advantages, difficulties and risks involved in the various procedures. This part is intended primarily to assist young neurosurgeons in their postgraduate train ing. However, we are convinced that it will also be useful to experienced, fully trained neurosurgeons. 172 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -There are two important reasons for commencing this new series of publi cations entitled 'Advances and Technical Standards in Neurosurgery': 1. the lack of any organized common European postgraduate training system for young neurosurgeons and 2. the language barriers, which impede the exchange of neuro surgical findings in Europe more than in other parts of the world. The fact that the English language is well on the way to becoming the international medium at European scientific conferences is a great asset in terms of mutual understanding. Therefore the Editors have decided to publish all contributions in English, regardless of the native language of the authors. All contributions are submitted to the entire editorial board before publi cation of any volume. Our series is not intended to compete with the publications of original scientific papers in other neurosurgical journals. Our intention is, rather, to present fields of neurosurgery and related areas in which important recent advances have been made. The contributions will be written by specialists in the given fields and will constitute the first part of each volume. 224 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -There are two important reasons for commencing this new series of publi cations entitled 'Advances and Technical Standards in Neurosurgery': 1. the lack of any organized common European postgraduate training system for young neurosurgeons and 2. the language barriers, which impede the exchange of neuro surgical findings in Europe more than in other parts of the world. The fact that the English language is well on the way to becoming the international medium at European scientific conferences is a great asset in terms of mutual understanding. Therefore the Editors have decided to publish all contributions in English, regardless of the native language of the authors. All contributions are submitted to the entire editorial board before publi cation of any volume. Our series is not intended to compete with the publications of original scientific papers in other neurosurgical journals. Our intention is, rather, to present fields of neurosurgery and related areas in which important recent advances have been made. The contributions will be written by specialists in the given fields and will constitute the first part of each volume.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 224 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The present work showcases a novel approach to modeling systems architectures by utilizing Lego bricks and RFID technology. The presented solution can be used by systems and software architects to communicate their design decisions with other stakeholders in the developments process such as customers and managers involved. The software provided in this book helps to get a concrete tool showing how the approach can be applied. If the reader is interested in experimenting with this approach, they will need to purchase LEGO blocks and the required RFID technology needed for this. 136 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -The book presents the state of the art, new results, and it also includes articles pointing to future developments. Most of the articles center around the theme of partial differential equations. Major aspects are fast solvers in elastoplasticity, symbolic analysis for boundary problems, symbolic treatment of operators, computer algebra, and finite element methods, a symbolic approach to finite difference schemes, cylindrical algebraic decomposition and local Fourier analysis, and white noise analysis for stochastic partial differential equations. Further numerical-symbolic topics range from applied and computational geometry to computer algebra methods used for total variation energy minimization. 368 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Substances belonging to this group of organic compounds are wi,lely distributed in Nature, being found in plants, both higher and lower fungi and, upto the present time, in one animal source, sheep wool-fat. For a long time no real differentiation was possible between the tetra- and penta cyclic triterpenes and the sterols. Then the two latter became disting uishable by their selenium. dehydrogenation products, i. e. , picene and naphthalene derivatives from the pentacyclic triterpenes and DIELS' hydrocarbon from the sterols. It is now apparent that those compounds yielding predominantly I: 2: 8-trimethylphenanthrene on dehydro genation represent yet another class, and this property is regarded as typical of the tetracyclic triterpenes. The group contains both C and C 30 3l compounds and, although the latter fall outside RUZICKA'S strict definition of triterpenes (I42), it seems desirable to permit this deviation. Members with thirty-two carbon atoms may well be discovered in due course. In a most valuable account of the triterpenes written in I949, JEGER. (II3) was able to summarize all that was known about the tetra cyclic group in a very small compass. Most of the work discussed in the present article has been published during the last five years and in that time the structures of some twenty compounds have been elucidated. Of outstanding importance is the revelation of close structural relation ships tQ the steroids, and the presence of C and C side-chains, skeletally 8 9 identical with those of cholesterol and ergosterol. 564 pp. Englisch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Carboxylic Acids in Petroleum and Sediments.- I. General.- 1. Introduction.- 2. Occurrence.- 3. Derivatization.- II. Paraffinic Acids.- 1. Linear Fatty Acids.- 2. Unsaturated Fatty Acids.- 3. Iso and Anteiso Acids.- 4. Isoprenoid Acids.- 5. ¿Pseudo¿ Isoprenoid Acids.- III. Cyclic Saturated Acids.- 1. Monocyclic Acids.- 2. Bi- and Polycyclic Naphthenic Acids.- 3. Tricyclic Terpenoid Acids.- 4. Steroid Acids.- 5. Pentacyclic Triterpenoid Acids.- IV. Aromatic Acids.- 1. Mono- and Diaromatic Acids.- 2. Polynuclear Aromatic and Heterocyclic Carboxylic Acids.- V. The Origin of Petroleum Carboxylic Acids.- VI. Bifunctional Acids.- 1. Dicarboxylic Acids.- 2. Hydroxy- and Ketoacids.- 3. Amino Acids.- 4. Miscellaneous.- References.- Naturally Occurring 2,5-Dioxopiperazines and Related Compounds.- I. Introduction.- II. Synthesis of 2,5-Dioxopiperazines.- III. Conformations of Dioxopiperazines.- IV. Simple Dioxopiperazines.- V. The Echinulins and Related Derivatives.- VI. Hydroxypyrazine Derivatives.- VII. Sulphur-bridged Dioxopiperazines.- VIII. Bicyclomycin and Dibromophakellin.- References.- Structural Investigations of Natural Products by Newer Methods of NMR Spectroscopy.- I. Introduction.- II. Solvent Effects.- III. Derivatives and In Situ Reactions.- IV. Coupling Constants.- V. Superconducting Magnets.- VI. Lanthanide Induced Shifts.- VII. Computer-Aided Interpretation of Spectra.- VIII. INDOR.- IX. The Nuclear Overhauser Effect.- X. Fourier Transform Techniques.- 1. Instrumentation.- 2. Proton Spectra from Small Samples.- XI. 13C Satellites.- XII. Other Nuclei.- XIII. 13C NMR Spectra.- 1. General Discussion.- 2. Sample Size and Acquisition Times.- 3. Chemical Shifts of Alkyl Residues.- 4. Functional Group Recognition.- 5. Substituent and Stereochemical Effects.- 6. Biogenetic Studies.- 7. Relaxation Studies.- XIV. Complementary Studies.- References.- Applications of the Chiroptical Techniques to the Study of Natural Products.- I. Introduction.- 1. Units and Definitions.- 2. Logic of Applications.- II. Allocation of Configuration.- 1. Carbonyl Chromophores in Steroids and Terpenes: Empirical Correlations.- a) Hexahydroindan-l- and 2-ones.- b) Bicyclo-[5,3,0]-octanones.- c) Decalones.- d) 4,4-Dimethyl-3-oxo-Steroids and Triterpenes.- e) Orientation of the Steroidal Side Chain.- f) Monocyclic and Acyclic Ketones.- g) Difference Curves in Dicarbonyl Compounds.- h) Epoxyketones.- 2. Carbonyl Chromophores: Application of the Octant Rule.- a) trans-Decalones.- b) cis-Decalones.- c) Flexible Monocyclic Cyclohexanones.- d) Cyclopentanones.- e) Cycloheptanones and Cyclobutanones.- f) Epoxy- and Cyclopropyl Ketones.- 3. Unsaturated Ketones.- a) Empirical Correlations.- b) Helicity Rule.- 4. Dienes and Polyenes.- a) Helicity Rules for Dienes.- b) Carotenoids and Related Compounds.- 5. Aromatic Chromophores.- a) Tetrahydroisoquinoline Alkaloids.- b) Indole Alkaloids.- c) Oxindole and Isoindole Alkaloids.- d) Aryltetralins Including Lignans.- e) Aryltetrahydroisoquinolines.- f) Flavans: Isoflavans and Related Compounds.- g) Other Aromatic Correlations.- h) Biphenyls.- i) Purine and Pyrimidine Chromophores in Nucleosides.- 6. The Carboxyl Chromophore.- a) Correlations Involving Acids or Modified Groups as Principal Chromophore.- b) Correlations Involving Degradation to a Carboxylic Acid Fragment.- c) Empirical Correlations in Complex Lactones and Lactams.- d) Saturated Lactones: Correlations by Semi-Empirical Rules.- e) , -Unsaturated Lactones.- 7. Chromophoric Derivatives.- III. Studies of Conformation.- IV. Position of Functional Groups.- VI Inhaltsverzeichnis. Contents.- V. Detection of Optical Activity.- VI. Identity of Two Samples.- VII. Reaction Kinetics and Equilibria.- Acknowledgement.- References.- Chemistry and Biosynthesis of Plant Galactolipids.- I. Introduction.- II. Occurrence and Localization.- III. Structure Determination and Synthesis.- 1. Fractionation.- 2. Identification and Structure Determination.- 3. Synthesis of Galactosyl Glycerol and Galactosyl Diglycerides.- 4. Semi-Synthesis.- 5. Fatty Acid Content.- IV. Biosynthesis.- V. Enzymatic Hydrolysis.- VI. Function.- 1. Galactolipids in Chloroplast Membrane Structure.- 2. Galactolipids and the Synthesis of Fatty Acids.- 3. Galactolipids and Electron Transport.- 4. Other Functions.- References.- Recent Advances in Polynucleotide Synthesis.- Abbreviations and Symbols.- 1. Protecting Groups.- 1.1. General Considerations.- 1.2. Choice of Blocking and Deblocking Conditions.- 1.3. Survey of Blocking Groups.- 1.3.1. Protecting Groups for the Phosphate Moiety.- 1.3.2. Protecting Groups for the Hydroxyl and Amino Functions of the Sugar and Base Moieties.- 1.3.3. Protecting Groups for the Vicinal Diol Group of Ribonucleic Acid Constituents.- 1.4. Protecting Groups with Special Applications.- 1.4.1. Protecting Groups for Solvent Extraction.- 1.4.2. Protecting Groups for Separations by Affinity Chromatography.- 1.4.3. Activable Protecting Groups.- 1.5. Strategy of Consecutive Blocking or Deblocking of Several Functions.- 1.6. General Blocking Schemes for Intermediates of Polynucleotide Synthesis.- 2. Phosphorylation Methods in the Synthesis of Mono- and Oligonucleotides.- 2.1. Transfer of a Phosphoryl Group.- 2.2. Transfer of a Phosphate Group.- 2.3. Miscellaneous Chemical Phosphorylation Reactions.- 2.3.1. Phosphorylation by Oxidation of Nucleoside Phosphites.- 2.3.2. ¿Thermal¿ Phosphorylation.- 2.3.3. Prebiotic Phosphorylations.- 2.4. Enzymic Phosphorylation.- 3. Separation Techniques.- 3.1. Column Procedures.- 3.1.1. Column Chromatography on Conventional Adsorbent Types.- 3.1.2. Column Chromatography on Newly Developed Adsorbent Types.- 3.2. Extraction Procedures.- 3.3. Miscellaneous Techniques.- 4. Formation of Internucleotide Linkages by Chemical Synthesis.- 4.1. Conventional Methods.- 4.1.1. Synthesis in the Deoxy Series.- 4.1.2. Synthesis in the Ribo Series.- 4.1.3. Modified.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Biosimulation is an approach to biomedical research and the treatment of patients in which computer modeling goes hand in hand with experimental and clinical work. Constructed models are used to interpret experimental results and to accumulate information from experiment to experiment.This book explains the concepts used in the modeling of biological phenomena and goes on to present a series of well-documented models of the regulation of various genetic, cellular and physiological processes. The way how the use of computer models allows optimization of cancer treatment for individual patients is discussed and models of interacting nerve cells that can be used to design new treatments for patients with Parkinson's disease are explained. Furthermore this volume provides an overview on the use of models in industry, and presents the view of regulatory agencies on the topic. 412 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In this book, space systems are situated in the global processes of the 21st century's information society and the role that space information systems could play in risk management is determined; methods of detecting and forecasting of both natural disasters and technogenic catastrophes and existing global and regional monitoring systems are described; and the IGMASS is introduced with its architecture and design concept and social and economic aspects and estimates of its creation, development, and utilization. Finally, results of the international symposium held in Limassol, Cyprus, in November 2009 in preparation of the IGMASS project's submission to the United Nations are discussed. 352 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Intended to update scientists and engineers on the current state of the art in a variety of key techniques used extensively in the fabrication of structures at the nanoscale. The present work covers the essential technologies for creating sub 25 nm features lithographically, depositing layers with nanometer control, and etching patterns and structures at the nanoscale. A distinguishing feature of this book is a focus not on extension of microelectronics fabrication, but rather on techniques applicable for building NEMS, biosensors, nanomaterials, photonic crystals, and other novel devices and structures that will revolutionize society in the coming years. 352 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Intended to update scientists and engineers on the current state of the art in a variety of key techniques used extensively in the fabrication of structures at the nanoscale. The present work covers the essential technologies for creating sub 25 nm features lithographically, depositing layers with nanometer control, and etching patterns and structures at the nanoscale. A distinguishing feature of this book is a focus not on extension of microelectronics fabrication, but rather on techniques applicable for building NEMS, biosensors, nanomaterials, photonic crystals, and other novel devices and structures that will revolutionize society in the coming years.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 352 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Biosimulation is an approach to biomedical research and the treatment of patients in which computer modeling goes hand in hand with experimental and clinical work. Constructed models are used to interpret experimental results and to accumulate information from experiment to experiment.This book explains the concepts used in the modeling of biological phenomena and goes on to present a series of well-documented models of the regulation of various genetic, cellular and physiological processes. The way how the use of computer models allows optimization of cancer treatment for individual patients is discussed and models of interacting nerve cells that can be used to design new treatments for patients with Parkinson's disease are explained. Furthermore this volume provides an overview on the use of models in industry, and presents the view of regulatory agencies on the topic.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 412 pp. Englisch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -In this book, space systems are situated in the global processes of the 21st century¿s information society and the role that space information systems could play in risk management is determined; methods of detecting and forecasting of both natural disasters and technogenic catastrophes and existing global and regional monitoring systems are described; and the IGMASS is introduced with its architecture and design concept and social and economic aspects and estimates of its creation, development, and utilization. Finally, results of the international symposium held in Limassol, Cyprus, in November 2009 in preparation of the IGMASS project¿s submission to the United Nations are discussed.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 352 pp. Englisch.

Taschenbuch. Condizione: Neu. Stelzel, M. (illustratore). This item is printed on demand - it takes 3-4 days longer - Neuware -Die DurchfUhrung von Nervenblockaden hat sich als uberaus wirksame MaBnahme er wiesen und bringt insbesondere in der Bekampfung von Schmerzen eine Reihe von Vorteilen fUr den Patienten. Es hat sich allerdings gezeigt, daB auch einige Nachteile in dieser Art der Behandlung liegen. Ais gravierendst wird diesbezuglich angesehen, daB der Patient von jenem Arzt, der die Blockaden durchfUhrt, abhangig wird und sich bei Abwesenheit dieses Therapeuten verlassen vorkommt, ja verlassen ist, da niemand im Faile neuerlich auftretender Schmerzen so effizient helfen kann. Dazu kommt, daB manchmal an der Therapie mit Nervenblockaden interessierte Arzte die hierzu n6tigen Voraussetzungen nicht mitbringen oder anschaffen. Daraus resultiert, daB bei manchen Anfangern in dieser Technik wesentlich haufiger als n6tig Nebenwirkungen auftreten und die Effizienz doch leidet. Beide diese Nachteile lassen sich durch Anwendung von elektrischem Strom (in ganz spezifischer Weise) umgehen. Das soil nicht heiBen, daB wir von pharmakologischen Nervenblockaden abraten, ganz im Gegenteil. Allerdings benutzen auch wir fUr manche Zustande eher elektrische Blockaden (siehe Haufigkeits tabelle). Vorerst muB jedoch bewiesen werden, daB unter den verschiedenen Arten der Anwendung des elektrischen Stromes von der Haut aus ganz bestimmte Stromfor men bzw. Reizformen eine Wirkung auf Nerven haben. Denn nur bei Nachweis einer solchen Wirkung lassen sich die Prinzipien der Nervenblockade durch Lokalanaesthe tika auch auf Anwendung des elektrischen Stromes ubertragen und die Vorteile der Blockadentechnik auf Behandlung mittels elektrischem Strom anwenden. Wie dies m6glich wird, soli im Abschnitt 'Grundsatzliches' nunmehr erlautert werden. 180 pp. Deutsch.

Buch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Viele Menschen werden im Laufe ihres Lebens mit Schwindel und assoziierten Symptomen konfrontiert. Die Ursachen sind vielfältig, zu dem subjektiven Schwindel kommen nicht selten auch Unsicherheit und Gleichgewichtsstörungen hinzu. Gerade ältere Patienten sind durch Schwindel sturzgefährdet. Im Abstand von zwei Jahren treffen sich Schwindelexperten aus den Fachdisziplinen Neurologie und HNO im Rahmen der Hennig-Symposien, um aktuelles Wissen auszutauschen und interessierten Ärzten zu vermitteln. Das nunmehr 8. Hennig-Symposium fand im Oktober 2010 in Nürnberg unter dem Motto Vertigo Kontroverses und Bewährtes statt. Der vorliegende Begleitband zu diesem Symposium fasst die Beiträge zusammen und verschafft neben einem topaktuellen und praxisnahen Überblick über Diagnostik und Therapie des Schwindels auch Einblick in die aktuelle Forschung. 260 pp. Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Das im Jahre 1938 erschienene Buch des Verfassers 'Momententafeln und EinfluBflachen fur kreuzweise bewehrte Eisenbetonplatten' brachte erstmalig Unterlagen zur Berechnung der Fahrbahnplatten von StraBenbrucken nach der Plattentheorie. Die Anleitung zum Ge- brauch der Zahlentafeln war so gehalten, daB sie auch fur Statiker, denen die Plattentheorie nicht gelaufig ist, verstandlich sein solIte. Die verwendeten plattentheoretischen Formeln waren in einem Anhang wiedergegeben; die meisten von ihnen waren damals in keinem anderen Buch zu finden, nur der Losungsansatz war bekannt. Inzwischen ist in den Deutschen und den Osterreichischen Normen fur Massivbrucken die Berechnung der Fahrbahnplatten nach der Plattentheorie vorgeschrieben worden; Hand in Hand damit ging die Vermehrung des Schrifttums urn einschlagige Tafelwerke. Andere Tafelwerke dienen zur Berechnung von Deckenplatten und Behalterwanden. Das vorliegende neue Buch - der neue Titel weist darauf hin - umfaBt alle Anwendungs gebiete: Es ermoglicht die aus/uhrliche Berechnung von rechtwinkeligen Platten unter beliebiger Belastung und fur aIle LagerungsfaIle, d. h. fur aIle moglichen Kombinationen von frei drehbar gestutzten, elastisch eingespannten und ungestutzten Randern. Die Kenntnis der Platten theorie wird vorausgesetzt. Dem genannten Zweck dienen: 'Formeln fur die Durchbiegungen, Momente und Querkrafte in den GrundfaIlen; Rechenverfahren fur die weiteren LagerungsfalIe, die durch Uberlagerung mehrerer Grundfalle gewonnen werden; Zahlentafeln uber den Momentenverlauf bei Gleichlast, Dreiecklast und Randmome- angriff im Grundfall; . Tafeln uber eingespannte Rechteckplatten unter Gleichlast und Dreiecklast. Die Tafeln uber Rechtecklasten und EinfluBflachen wurden aus dem alten Buch uber nommen und durch weitere EinfluBflachen erganzt. AuBer den Platten selbst wurden noch die die Plattenrander unterstutzenden Trager behandelt. 640 pp. Deutsch.

Buch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -Viele Menschen werden im Laufe ihres Lebens mit Schwindel und assoziierten Symptomen konfrontiert. Die Ursachen sind vielfältig, zu dem subjektiven Schwindel kommen nicht selten auch Unsicherheit und Gleichgewichtsstörungen hinzu. Gerade ältere Patienten sind durch Schwindel sturzgefährdet. Im Abstand von zwei Jahren treffen sich Schwindelexperten aus den Fachdisziplinen Neurologie und HNO im Rahmen der Hennig-Symposien, um aktuelles Wissen auszutauschen und interessierten Ärzten zu vermitteln. Das nunmehr 8. Hennig-Symposium fand im Oktober 2010 in Nürnberg unter dem Motto ¿Vertigo ¿ Kontroverses und Bewährtes¿ statt. Der vorliegende Begleitband zu diesem Symposium fasst die Beiträge zusammen und verschafft neben einem topaktuellen und praxisnahen Überblick über Diagnostik und Therapie des Schwindels auch Einblick in die aktuelle Forschung.Springer-Verlag KG, Sachsenplatz 4-6, 1201 Wien 260 pp. Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben. 380 pp. Englisch, Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -In their monumental work 'The Cactaceae', BRITTON and ROSE (I9) record 1235 species belonging to the three tribes which constitute the family of the Cacti. The actual number of the species must be con siderably higher. Cacti occur frequently in tlie more arid and less accessible regions of the American Continent, nearly always within very narrow and definite borderlines. The habitat of a species is in many instances a single valley located in a remote, uninhabited region of the Cordillera. Thus the collection of flowering specimens fit for botanical identification is some times extremely difficult. On the other hand, cacti are apt to develop individual variations in their characteristic morphological features, rendering the definition of a species difficult and often illusory. Specimens taken from their normal habitat to botanical gardens or arboreta often die, degenerate or stop flowering. Taking into account all these difficulties, it is not surprising to find considerable differences of opinion among botanists on the taxonomy of the cactaceae. A considerable number of species have not been well defined and in many cases different names have been given to the same species. The index of BRITTON and ROSE records not less than 7000 binomials. 404 pp. Englisch, Französisch, Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Die Befruchtung spielt eine bedeutende Rolle im Entwicklungsgang der Organismen. In ihrem Verlauf werden die Gametenkerne, und damit das genetische Material zweier Individuen, vereinigt. Durch die Meiose (Reduktionsteilung) wird der Ausgangszustand wiederhergestellt, jedoch in einer solchen Weise, daB die elterlichen Erbfaktoren in den verschiedensten Kombinationen neu verteilt werden konnen. Die Beob achtung von Befruchtungsvorgangen zeigt, daB der eigentlichen Ver schmelzung der Geschlechtszellen Reaktionen vorausgehen, an denen offensichtlich chemische Wechselwirkungen beteiligt sind. Besonders deutlich lassen sich solche stoffiichen Wechselwirkungen bei niederen Pflanzen beobachten, bei denen beispielsweise Geschlechtsorgane nur gebildet werden, wenn der entsprechende Partner oder Filtrate seines Kulturmediums vorhanden sind. In anderen Fallen kann man beobachten, daB Geschlechtsorgane durch Luft oder Wasser gerichtet aufeinander zu wachsen oder, daB freibewegliche mannliche Gameten sich gezielt zu stationaren weiblichen Gameten hinbewegen. Solche biologischen Reak tionen sind auBerordentlich empfindlich, und die Konzentration der beteiligten Stoffe ist entsprechend gering. Dies macht die Ansammlung von gentigenden Mengen fUr die StrukturaufkIarung zu einem auBerst mtih samen Unternehmen. Obwohl auch in der alteren Literatur zahlreiche Hinweise auf chemische Wechselwirkungen zwischen Sexualpartnern vor handen sind (42, 43), konnten bisher erst wenige derartige Geschlechts stoffe identifiziert werden. Erst die hochleistungsnihigen modernen Ana lysenmethoden, wie Massen- und Kernresonanz-Spektroskopie, haben hierbei die Forschung wesentlich vorangetrieben. Man kennt heute die Molekularstruktur von vier Sexualhormonen, die nunmehr auch synthe tisch zuganglich sind. 680 pp. Englisch, Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -During the early 1950's there appeared reports, from time to time of the presence among the products elaborated by actinomycetes of antifungal antibiotics which exhibited very similar and very characteristic multipeaked ultraviolet absorption spectra. In 1954, with a good number of examples on record, these spectra were analyzed and identified as those of straight-chain conjugated polyenes, comprising tetraenes, pentaenes, hexaenes and heptaenes (85, I30). These antibiotics have since been commonly referred to as the polyene antifungal antibiotics to distinguish them from a host of other miscellaneous antibiotics which also have antifungal properties. Within the next few years, reports of discoveries of new members of this class multiplied rapidly, and almost sixty are now known. Unquestionably, a number of these will eventually be found to be identical with others, as has already happened in several instances: for example, the tetraene 'tennecetin' proved to be a rediscovery of pimaricin (34), and in the methyl pentaenes 'moldcidin E' has been identified with pentamycin (83), and 'lagosin' appears to be indistinguishable from fungichromin (22). Those that have been purified have turned out to be of fairly high molecular weight (ca. 700-1300) and all appear to be substances of rather similar molecular structure. So far only three, pimaricin, fungi chromin (lagosin) and filipin, have been structurally elucidated. 376 pp. Englisch, Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Dieser Buchtitel ist Teil des Digitalisierungsprojekts Springer Book Archives mit Publikationen, die seit den Anfängen des Verlags von 1842 erschienen sind. Der Verlag stellt mit diesem Archiv Quellen für die historische wie auch die disziplingeschichtliche Forschung zur Verfügung, die jeweils im historischen Kontext betrachtet werden müssen. Dieser Titel erschien in der Zeit vor 1945 und wird daher in seiner zeittypischen politisch-ideologischen Ausrichtung vom Verlag nicht beworben. 508 pp. Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - Print on Demand Titel. Neuware -weitere EinfluBflachen erganzt. AuBer den Platten selbst wurden noch die die Plattenrander unterstutzenden Trager behandelt.Springer Verlag GmbH, Tiergartenstr. 17, 69121 Heidelberg 640 pp. Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -Inhaltsangabe- Contents. - Table des matières.- Über die Konstitution der Triterpene.- I. Einleitung.- 1. Einteilung der Triterpene.- 2. Bemerkungen zur Konstitutionsaufklärung.- II. Squalen-Gruppe.- Squalen.- Ambrein.- III. Tetracyclische Triterpene.- 1. Kryptosterin-Gruppe.- Vorkommen und Isolierung.- Umwandlungen.- Abbaureaktionen.- a) Umwandlungen im Bezirke der Hydroxylgruppe.- b) Umwandlungen im Bezirke der reaktionsträgen Doppelbindungen des Kryptosterins.- 2. Euphol und Butyrospermol.- 3. Elemisäure-Gruppe.- IV. Pentacyclische Triterpene.- I. -Amyrin-Oleanolsäure- Gruppe.- Nomenklatur.- Vorkommen und Isolierung.- Umwandlungen.- Oleanolsäure.- Echinocystsäure.- Umwandlungen in den Ringen C, D und E des -Amyrins.- Erythrodiol.- Ouillajasäure, Genin A, Maniladiol.- Gypsogenin, Hederagenin.- Sumaresinolsäure.- -Boswellinsäure.- Sojasapogenole A, B, C und D.- Glycyrrhetinsäure.- Siaresinolsäure.- Germanicol.- Basseol.- 2. -Amyrin-Ursolsäure-Gruppe.- Nomenklatur.- Vorkommen und Isolierung.- -Amyrin.- Brein.- -Boswellinsäure.- Ursolsäure.- Uvaol.- 3. Lupeol- und Heterobetulin-Gruppe.- Nomenklatur.- Vorkommen und Isolierung.- Umwandlungsreaktionen.- Lupeol.- Betulin und Betulinsäure.- Heterobetulin.- 4. Nicht völlig aufgeklärte pentacyclische Triterpene.- Aescigenin.- Bassiasäure.- Chinovasäure.- a) Dehydrierung.- b) Sekundäre Hydroxylgruppe und deren Umgebung.- c) Leicht abspaltbare Carboxylgruppe.- d) Ringe D und E.- Friedelin und Cerin.- 5. Stereochemie der pentacyclischen Triterpene.- 1. -Amyrin-Oleanolsäure- Gruppe.- 2. -Amyrin-Ursolsäure-Gruppe.- 3. Lupeol- und Heterobetulin-Gruppe.- Konstitution, Konfiguration und Synthese digitaloider Aglykone und Glykoside.- I. Einleitung.- II. Aglykone und Glykoside bekannter Konstitution.- 1. Digitoxigenin.- a) Konstitutionsaufklärung.- b) Synthese von Abbauprodukten und Umwandlungen des Digitoxigenins in Desoxy-corticosteron.- c) Glykoside des Digitoxigenins.- 2. Uzarigenin.- a) Konstitutionsaufklärung und Synthese von Abbauprodukten des Uzarigenins.- b) Glykoside des Uzarigenins.- c) allo-Uzarigenin.- 3. Gitoxigenin.- a) Konstitution und Synthese von Abbauprodukten des Gitoxigenins.- b) Glykoside des Gitoxigenins.- c) Oleandrigenin (16-Acetyl-gitoxigenin).- 4. Digoxigenin.- a) Konstitution des Digoxigenins und Synthese von Abbauprodukten.- b) Glykoside des Digoxigenins.- 5. Sarmentogenin.- a) Konstitution des Sarmentogenins und Synthese von Abbauprodukten.- b) Glykoside des Sarmentogenins.- 6. Periplogenin.- a) Konstitution.- b) Synthetische Arbeiten.- c) Glykoside des Periplogenins.- 7. Konstitution der allo-Aglykone; allo-Periplogenin.- a) Konfigurationsbestimmung.- b) Glykoside des allo-Periplogenins.- 8. Strophanthidin.- a) Konstitution.- b) Synthetische Arbeiten und die Zusammenhänge zwischen den einzelnen Strophanthus-Glykosiden.- c) Glykoside des Strophanthidins.- d) allo-Strophanthidin, Aglykon und Glykosid.- 9. Strophanthidol, Aglykon und Glykoside.- III. Glykoside und Aglykone unbekannter Konstitution.- 1. Ouabain.- 2. Antiaris-Glykoside.- 3. Calotropis-Gifte.- 4. Sarverosid und die Sarmentoside A und B.- 5. Adonitoxin.- 6. Glykoside des Pfaffenhütchens, Evonymus europaea.- 7. Nebenglykoside des Oleanders.- 8. Glykoside und Aglykone von Coronilla glauca.- 9. Tanghinia-Glykoside.- IV. Übersichtstabellen.- Thyroxine and Related Compounds.- I. The Relation Between Structure and Thyroxine-like Activity.- 1. Halogenated Thyronines.- 2. Isomers of Thyroxine.- 3. Thyroxine Derivatives.- 4. Homologs and Analogs of Thyroxine.- 5. General Remarks on Thyromimetic Activity.- II. The Synthesis of DL-and L-Thyroxine.- III. Inhibition of the Action of Thyroxine by Structurally Related Compounds.- References.- Penicillin and its Place in Science.- History of Penicillin and its Development.- Some Biochemical and Microbiological Aspects of Penicillin.- Penicillin Assay Methods.- Dilution Assays.- Penicillin Standards.- The Cup-Plate Method.- Other Assays.- Production of Penicillin.- a) Cultu 344 pp. Englisch, Deutsch.

Taschenbuch. Condizione: Neu. This item is printed on demand - it takes 3-4 days longer - Neuware -InhaltsangabeTable des matieres.- Photochemische Umwandlungen ausgewählter Naturstoffe.- I. Einleitung.- II. Zum Mechanismus photochemischer Reaktionen.- III. Fragmentierung von Carbonylverbindungen.- 1. Spaltung von -ständigen C-C-Bindungen.- 2. Spaltung zu Acyl-Alkyl-Radikalpaaren Rekombination des Radikalpaares 6. - Intramolekulare Dis-proportionierung des Radikalpaares 8. - Decarbonylierungen.- 3. Acylwanderungen.- IV. Gerüstumlagerungen alicyclischer Ketone.- 1. , -Epoxy-ketone.- 2. Konjugierte Cyclohexenone.- 3. Gekreuzt konjugierte Cyclohexadienone Primäre Umwandlungen der gekreuzt konjugierten Dienone 27. - Umwandlungen der ketonischen Photoisomeren 31. - Modifikationen des Isomerisierungsverlaufs gekreuzt konjugierter Dienone 35. - Umwandlungen in phenolische Photoisomeren 36.- V. Ringkontraktionen cyclischer Diazoketone.- VI. Intramolekulare Substitutionen unter Wasserstoffverschiebung.- 1. Diazoketone.- 2. Hofmann-Löffler-Freytag-Reaktion.- 3. Nicht-konjugierte Ketone und Aldehyde.- 4. Nitritester.- 5. Hypojodite.- 6. Hypochlorite.- 7. Alkyl- und Säureazide.- VII. Umwandlungen von Doppelbindungssystemen.- 1. Cis-trans-Isomerisierung.- 2. Suprasterin2-II und 3;5-Cholestadien.- 3. Homoannulare Diene Ringspaltung zu Trienen 65. - Cyclisation zu Cyclobuten-Derivaten 69.- 4. Cycloheptadienone.- 5. Tropolone.- 6. Gerüstumlagerung der 5;7;9;11-Steroide.- 7. Doppelbindungswanderungen.- 8. Cycloadditionen.- VIII. Pyrimidine, Riboflavin und Aminosäuren.- Stilbene im Pflanzenreich.- I. Historischer Überblick.- II. Isolierung und Konstitution.- 1. Struktur.- 2. Physikalische Eigenschaften.- 3. Isolierungsmethoden.- 4. Nachweismethoden.- 5. Konstitutionsaufklärung.- 6. Konfiguration.- III. Synthesen.- 1. Stilbene.- 2. Stilbencarbonsäuren und 3,4-Dihydro-isocumarine.- IV. Vorkommen und Eigenschaften.- 1. Stilbene und Stilbenglucoside 4-Hydroxystilben 127. - 4-Methoxystilben 127. - Pinosylvin 127. - Pinosylvin-monomethyläther 127. - Pinosylvin-dimethyläther 127. - Resveratrol 128. - Piceid 128. - Pterostilben 128. - Oxyresvera-trol 128. - Chlorophorin 128. - Piceatannol 129. - Rhapontigenin 129. - Rhaponticin 130. - 3,5,3 ,4 ,5 -Pentahydroxystilben 130. - 3,5,3 ,4 ,5 -Pentahydroxystilben-glucosid 131.- 2. Hydrangenol und Phyllodulcin Hydrangenol 131. - Hydrangenol-8- -D)-glucosid 131. - Hydrangea-säure 132. - D-Phyllodulcin 132. - DL-Phyllodulcin 132.- V. Verteilung im Pflanzenreich.- 1. Systematische Übersicht.- 2. Verteilung und Bildung im pflanzlichen Gewebe.- 3. Taxonomische Bedeutung a) In der Gattung Pinus 136. - b) In der Gattung Eucalyptus 137.- VI. Biologische Wirkung.- 1. Kernholz-Inhaltsstoffe.- 2. Stilbene aus anderen Pflanzenorganen.- VII. Biosynthese.- 1. Hypothesen.- 2. Experimentelle Befunde a) Pinosylvine 141. - b) Piceid und Rhaponticin 142. - c) Oxy-resveratrol 142. - d) Hydrangenol 142.- 3. Zusammenfassung.- A Pattern of Development in the Chemistry of Pentacyclic Triterpenes.- I. The Classical Era of Triterpene Chemistr.- II. General Developments since 1949.- 1. Relationships between the Different Pentacyclic Skeleton.- 2. Stereochemistr.- 3. Biogenesi.- 4. New Techniques of Analysi.- III. Current Trends in the Chemistry of Pentacyclic Triterpene.- 1. Platanic Aci.- 2. Triterpenes from Fern.- 3. C(28)-Nor-triterpene.- 4. A-Seco-triterpene.- 5. Ceanothic Acid and Related Compound.- 6. More Highly Oxygenated Pentacyclic Triterpene.- IV. Tabulation of Dat.- Table 1. Pentacyclic Triterpenes of Known Structur.- Table 2. Classified List of Pentacyclic Triterpene Arborane System 180. - Hopane System 180. - Lupane System 182. - Oleanane System 183. - Ursane System 186.- Table 3. Pentacyclic Triterpenoids of Unknown Structur.- Reference.- Griseofulvin and Some Analogues.- I. Introductio.- II. The Chemistry of the Grisan.- 1. Nomenclatur.- 2. Isolation of Fungal Grisan.- a. Griseofulvi.- b. Griseofulvin Analogue.- 3. Structure and Absolute Configuration of Griseofulvi.- a. Structur Oxygen Function 208. - Oxydative Degra 384 pp. Englisch, Deutsch.