Der R Cksto Der Methode
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Modern Methods Of Plant Analysis Moderne Methoden Der Pflanzenanalyse
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Author : K. Biemann
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Modern Methods Of Plant Analysis Moderne Methoden Der Pflanzenanalyse written by K. Biemann and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
123 phase and hence have no direct bearing on the retention time of solutes. However in gas-solid chromatography, a considerable quantity of the mobile phase may be adsorbed on the surface of the stationary adsorbent which diminishes the column's effective length and ability to retain solutes. In this respect helium has been found to be preferable to most other gases (GREENE and Roy, 1957) because it is adsorbed to the least extent. 3. Packed columns offer a considerable resistance to flow, which may create a pressure differential between inlet and outlet of sufficient magnitude to cause an unfavorable flow rate through a significant length of the column. A reduced inlet/outlet pressure ratio can be obtained by using light molecular weight gases toward which the column packing shows the greatest permeability. The flow rate of the mobile phase is normally adjusted by altering the column inlet pressure, for which purpose commercial pressure regulators of sufficient accuracy are available. Quantitative measurements of the flow rate can be made by a number of methods, including rotameters, orifice meters, soapfilm flow meters and displacement of water. The former two methods are the most con venient but the least accurate; moreover they create a back pressure and are temperature dependent whereas although the moving soap bubble is cumbersome to employ and unusable for continuous readings, it is preferred when the highest accuracy is required.
Modern Methods Of Plant Analysis Moderne Methoden Der Pflanzenanalyse
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Author : K. Paech
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Modern Methods Of Plant Analysis Moderne Methoden Der Pflanzenanalyse written by K. Paech and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
Rechtsangleichung Grundlagen Methoden Und Inhalte
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Author : Karl Riesenhuber
language : de
Publisher: Walter de Gruyter
Release Date : 2011-12-22
Rechtsangleichung Grundlagen Methoden Und Inhalte written by Karl Riesenhuber and has been published by Walter de Gruyter this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-12-22 with Law categories.
Globalisierung und Recht - so lautete der Titel eines rechtswissenschaftlichen Kongresses, den die Alexander von Humboldt-Stiftung (AvH) und der Deutsche Akademische Austauschdienst (DAAD) in Zusammenarbeit mit der Japan Foundation for the Promotion of Science (JSPS) im September/Oktober 2005 in Tokio ausgerichtet haben. Es ging dort um die Auswirkungen des Globalisierungsphänomens auf das Recht und die Rechtswissenschaft, aber auch um die Folgewirkungen für die traditionell enge deutsch-japanische Zusammenarbeit im Bereich der Rechtswissenschaft. Am Rande des Kongresses boten die Veranstalter Nachwuchswissenschaftlern Gelegenheit zum wissenschaftlichen Austausch und zur Anknüpfung neuer Verbindungen. Generalthema dieses Forums war "Rechtsangleichung". Damit sollte eines von vielen möglichen rechtlichen Mitteln, der Globalisierung Rechnung zu tragen, eingehender untersucht werden: in Grundlagen und Methoden sowie, exemplarisch, für einzelne Inhalte. Die Vielzahl der von den Teilnehmern vertretenen Teilrechtsgebiete ebenso wie die unterschiedliche nationale Perspektive erwies sich dabei als besonders anregend und für eine vertiefte Diskussion weiterführend. Veranstalter und Teilnehmer haben das Nachwuchswissenschaftler-Forum als Auftakt verstanden. Die Teilnehmer haben die Diskussion in vielen Bereichen fortgeführt. Ein Ausdruck dessen ist auch der hier vorgelegte Tagungsband. Er ist im besten Sinne ein Gemeinschaftswerk. Die Publikation in beiden Sprachen soll Wissenschaftlern beider Länder den Zugang erleichtern und Ansatzpunkte für eine Zusammenarbeit aufzeigen.
Moderne Methoden Der Pflanzenanalyse Modern Methods Of Plant Analysis
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Author : K. Paech
language : en
Publisher: Springer Science & Business Media
Release Date : 2012-12-06
Moderne Methoden Der Pflanzenanalyse Modern Methods Of Plant Analysis written by K. Paech and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012-12-06 with Science categories.
If, following the solvent extraction of a hydrocarbon from a plant, it is not known whether it is one or the other, a method of distinguishing the two is described by HENDRICKS, WILDMAN and JONES (1946). The technique involves the infra-red absorption spectra of the two isomers. At about 12 mp. the relative absorption coefficient of rubber is 42% greater than for gutta. ScHLESINGER and LEPER (1951) describe two procedures for separation of the rubber and gutta hydrocarbons from large quantities of crude chicle. In one, the chicle is extracted with benzene which dissolves both isomers. An excess absolute ethyl acetate is added and the mixture stored at 5° C overnight. The gutta precipitates out and the rubber remains in solution. The other method is as follows: (1) Ten grams of chicle are extracted with acetone for 24 hours in a Soxhlet extraction apparatus. (2) The insoluble material in the thimble is allowed to .. it dry, then immersed in 150 ml. of cold Skellysolve B in a refrigerator at 10° C and· allowed to stand for 48 hours with occasional agitation. (3) The thimble is then removed from the solvent and the enclosed residue washed several times with fresh, cold Skellysolve B. (4) An excess of acetone and a few drops of a concentrated aqueous solution of sodium iodide are added to the combined Skellysolve B extract and washings and allowed to stand overnight in a refrigerator.
Praxeology As A Challenge
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Author : Anna Herbert
language : en
Publisher: Waxmann Verlag
Release Date : 2013
Praxeology As A Challenge written by Anna Herbert and has been published by Waxmann Verlag this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Education categories.
The question, 'how to do things with words?' (John L. Austin) could characterize the field of pedagogy in general, if not also practices, structural and material aspects had to be taken into account. The empirical question how social practices constitute a (binding) reality comes close to the praxeological perspective. On one side, 'praxeology' is a specific methodological approach to explore practices empirically. On the other side, it covers philosophical or sociological theories of action regarding sociality as generated by social practices and contextual structures. Practices are supposed to transmit, constitute and create ?establish e.g. social orders. The focus lies on corporal, performative and emergent aspects of the practices. All the mainly empirical studies in this volume deal with the praxeological question how sociality is generated in dynamic and relational actions in a pedagogical frame.
Aktuelle Methoden Der Laser Und Medizinphysik
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Author : Ulrich Hartmann
language : en
Publisher: Margret Schneider
Release Date : 2005
Aktuelle Methoden Der Laser Und Medizinphysik written by Ulrich Hartmann and has been published by Margret Schneider this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Biophysics categories.
Enabling Manufacturing Competitiveness And Economic Sustainability
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Author : Michael F. Zaeh
language : en
Publisher: Springer Science & Business Media
Release Date : 2013-09-12
Enabling Manufacturing Competitiveness And Economic Sustainability written by Michael F. Zaeh and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-09-12 with Technology & Engineering categories.
The changing manufacturing environment requires more responsive and adaptable manufacturing systems. The theme of the 5th International Conference on Changeable, Agile, Reconfigurable and Virtual production (CARV2013) is "Enabling Manufacturing Competitiveness and Economic Sustainability. Leading edge research and best implementation practices and experiences, which address these important issues and challenges, are presented. The proceedings include advances in manufacturing systems design, planning, evaluation, control and evolving paradigms such as mass customization, personalization, changeability, re-configurability and flexibility. New and important concepts such as the dynamic product families and platforms, co-evolution of products and systems, and methods for enhancing manufacturing systems' economic sustainability and prolonging their life to produce more than one product generation are treated. Enablers of change in manufacturing systems, production volume and capability, scalability and managing the volatility of markets, competition among global enterprises and the increasing complexity of products, manufacturing systems and management strategies are discussed. Industry challenges and future directions for research and development needed to help both practitioners and academicians are presented. About the Editor Prof. Dr.-Ing. Michael F. Zaeh, born in 1963, has been and is Professor for and Manufacturing Technology since 2002 and, together with Prof. Dr.-Ing. Gunther Reinhart, Head of the Institute for Machine Tools and Industrial Management (iwb) at the Technische Universitaet Muenchen (TUM). After studying general mechanical engineering, he was doctoral candidate under Prof. Dr.-Ing. Joachim Milberg at TUM from 1990 until 1993 and received his doctorate in 1993. From 1994 to 1995, he was department leader under Prof. Dr.-Ing. Gunther Reinhart. From 1996 to 2002, he worked for a machine tool manufacturer in several positions, most recently as a member of the extended management. Prof. Dr.-Ing. Michael F. Zaeh is an associated member of the CIRP and member of acatech, WGP and WLP. His current researches include among others Joining and Cutting Technologies like Laser Cutting and Welding as well as Friction Stir Welding, Structural Behaviour and Energy Efficiency of Machine Tools and Manufacturing Processes like Additive Manufacturing.
Neue Methode Der Bienenzucht Frei Ins Deutsche Bertragen Und Vermehrt Von Einem Praktischen Bienenz Chter
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Author : F. MENUSIER
language : de
Publisher:
Release Date : 1863
Neue Methode Der Bienenzucht Frei Ins Deutsche Bertragen Und Vermehrt Von Einem Praktischen Bienenz Chter written by F. MENUSIER and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1863 with categories.
Methoden Der Organischen Chemie Houben Weyl
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Author : K. H. Büchel
language : en
Publisher:
Release Date : 1982
Methoden Der Organischen Chemie Houben Weyl written by K. H. Büchel and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Chemistry, Organic categories.
Handbook Of Information Science
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Author : Wolfgang G. Stock
language : en
Publisher: Walter de Gruyter
Release Date : 2013-07-31
Handbook Of Information Science written by Wolfgang G. Stock and has been published by Walter de Gruyter this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013-07-31 with Language Arts & Disciplines categories.
Dealing with information is one of the vital skills in the 21st century. It takes a fair degree of information savvy to create, represent and supply information as well as to search for and retrieve relevant knowledge. How does information (documents, pieces of knowledge) have to be organized in order to be retrievable? What role does metadata play? What are search engines on the Web, or in corporate intranets, and how do they work? How must one deal with natural language processing and tools of knowledge organization, such as thesauri, classification systems, and ontologies? How useful is social tagging? How valuable are intellectually created abstracts and automatically prepared extracts? Which empirical methods allow for user research and which for the evaluation of information systems? This Handbook is a basic work of information science, providing a comprehensive overview of the current state of information retrieval and knowledge representation. It addresses readers from all professions and scientific disciplines, but particularly scholars, practitioners and students of Information Science, Library Science, Computer Science, Information Management, and Knowledge Management. This Handbook is a suitable reference work for Public and Academic Libraries.