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Languages : en
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Languages : en
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Author: Egon Stahl
Publisher: Springer Science & Business Media
ISBN: 3642728928
Category : Science
Languages : en
Pages : 249
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Procedures for extracting or refining sensitive substances using dense gases have been developed for numerous purposes. Dense carbon dioxide is already being used industrially for decaffeination of coffee and extraction of hops. Further possible applications have been tested on the laboratory or pilot plant scales and shown to be mostly economical. Uses as varied as the non-aggressive extraction of spice, extraction of polymers, refining of spent oil, pyrolysis/extraction of wood and liquefaction of coal show the extremely wide range of application. The book comprehensively reviews the present state of development and features examples of application of this new technique.
Author: Gottfried Glöckner
Publisher: Springer Science & Business Media
ISBN: 3642757995
Category : Science
Languages : en
Pages : 227
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"The problems involved in separating complex macromolecules require under standing not only the chromatographic process but also the physicochemical behavior of the solutes." This sentence from the pen of Phyllis R. Brown 1, University of Rhode Island, can certainly be applied to synthetic copolymers whose structure is very complex indeed. Thus it may be forgiven that a book on copolymer HPLC has been written not by a trained chromatographer but by someone from the polymer side. The HPLC of synthetic polymers is often understood to mean only a synonym for size exclusion chromatography. The latter method separates polymers according to the size of the macromolecules and enables the molecular weight distribution of a sample to be evaluated. But as early as 1936, Mark and Saito attempted chromatographic fractionation of cellulose acetate on a charcoal-like adsorbent made from blood. HPLC adsorption chromatography was first applied to copolymer analysis by Teramachi et al. in 1979. Since then, another branch of polymer HPLC has arisen which has the capacity of separating copolymers by composition and enables the chemical composition distribution to be evaluated. The technique requires a suitable elution program and is mainly carried out as gradient elution.
Author: Ana Rita C. Duarte
Publisher: Bentham Science Publishers
ISBN: 1608050467
Category : Medical
Languages : en
Pages : 124
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Supercritical fluid technology can be seen as a green and environmentally friendly alternative to conventional. Current information on these topics is spread through different publications in different peer-reviewed journals. The editors were therefore of
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Category : Chemical engineering
Languages : en
Pages : 640
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Category : American literature
Languages : en
Pages : 2152
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Author: Johannes Rudolf von WAGNER
Publisher:
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Category :
Languages : en
Pages : 790
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Category : Coal
Languages : en
Pages : 844
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Author: E. Stahl
Publisher:
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Category :
Languages : en
Pages : 0
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Author: Havard Devold
Publisher: Lulu.com
ISBN: 1105538648
Category : Gas fields
Languages : en
Pages : 84
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