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  • Organic Chemistry  (68,970)
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  • 1
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemistry—History ; Inorganic chemistry ; Organic chemistry ; History of Chemistry ; Inorganic Chemistry ; Organic Chemistry
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 54 Seiten) , Illustrationen
    ISBN: 9783658283193
    Series Statement: essentials
    DDC: 540.9
    Language: German
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  • 2
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer Berlin Heidelberg | Berlin, Heidelberg : Springer Spektrum
    Keywords: Chemieunterricht ; Didaktik ; Chemistry, Organic ; Analytical biochemistry ; Science / Study and teaching ; Organic Chemistry ; Analytical Chemistry ; Learning & Instruction ; Science Education ; Teaching and Teacher Education ; Chemieunterricht ; Didaktik
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (IX, 271 S. 48 Abb., 26 Abb. in Farbe)
    ISBN: 9783662586457
    DDC: 547
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    Language: German
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  • 3
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemistry, Organic ; Catalysis ; Organic Chemistry ; Catalysis ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (X, 129 S. 143 Abb., 16 Abb. in Farbe)
    ISBN: 9783658246082
    Series Statement: BestMasters
    Uniform Title: Synthese und Evaluierung neuartiger Carbenliganden für die (enantio)selektive Hydrierung von Aromaten
    DDC: 547
    Language: German
    Dissertation note: Masterarbeit Westfälische Wilhelms-Universität Münster
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  • 4
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer Spektrum
    Person(s): Schwedt, Georg
    Keywords: Pyrotechnik ; Feuerwerk ; Chemie ; Chemistry, inorganic ; Chemistry-History ; Chemistry, Organic ; Chemistry, Physical organic ; Chemicals / Safety measures ; Inorganic Chemistry ; History of Chemistry ; Organic Chemistry ; Physical Chemistry ; Safety in Chemistry, Dangerous Goods ; Pyrotechnik ; Feuerwerk ; Chemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VI, 91 S. 20 Abb., 4 Abb. in Farbe)
    ISBN: 9783662579862
    DDC: 546
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    Language: German
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  • 5
    Online Resource
    Online Resource
    Berlin, Heidelberg : Springer Spektrum
    Keywords: Chemie ; Chemieunterricht ; Fachdidaktik ; Fotochemie ; Licht ; Organic chemistry ; Physical chemistry ; Inorganic chemistry ; Lasers ; Photonics ; Organic Chemistry ; Physical Chemistry ; Inorganic Chemistry ; Optics, Lasers, Photonics, Optical Devices ; Chemie ; Chemieunterricht ; Fachdidaktik ; Fotochemie ; Licht
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 271 S. 235 Abb., 209 Abb. in Farbe)
    Edition: 1st ed. 2019
    ISBN: 9783662603765
    DDC: 547
    Language: German
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  • 6
    Online Resource
    Online Resource
    Berlin : Springer
    Keywords: Koordinationslehre ; Homogene Katalyse ; Metallorganische Verbindungen ; Chemistry, inorganic ; Chemistry, Organic ; Inorganic Chemistry ; Organic Chemistry ; Koordinationslehre ; Homogene Katalyse ; Metallorganische Verbindungen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XVI, 528 S. 99 Abb., 50 Abb. in Farbe)
    Edition: 3., überarbeitete und erweiterte Auflage
    ISBN: 9783662566046
    Series Statement: Studienbücher Chemie
    DDC: 546
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    Language: German
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  • 7
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Brandbekämpfung ; Chemie ; Chemicals / Safety measures ; Fire prevention ; Chemistry, Physical organic ; Chemistry, Organic ; Chemistry, inorganic ; Nuclear chemistry ; Safety in Chemistry, Dangerous Goods ; Fire Science, Hazard Control, Building Safety ; Physical Chemistry ; Organic Chemistry ; Inorganic Chemistry ; Nuclear Chemistry ; Brandbekämpfung ; Chemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIX, 736 S. 300 Abb., 277 Abb. in Farbe)
    ISBN: 9783662566060
    DDC: 604.7
    Language: German
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  • 8
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Fotokatalyse ; Fotochemie ; Chemistry, Organic ; Catalysis ; Organic Chemistry ; Catalysis ; Hochschulschrift ; Fotokatalyse ; Fotochemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIV, 115 S. 23 Abb., 10 Abb. in Farbe)
    ISBN: 9783658263188
    Series Statement: BestMasters
    Uniform Title: Verwendung neuartiger Quencher zur Entwicklung photokatalytischer Reaktionen inspiriert durch mechanismusbasiertes Screening
    DDC: 547
    Language: German
    Dissertation note: Masterarbeit Westfälische Wilhelms-Universität Münster 2017
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  • 9
    Online Resource
    Online Resource
    Wiesbaden : Springer Fachmedien Wiesbaden | Wiesbaden : Springer Spektrum
    Person(s): Hecht, Thomas
    Keywords: Spectroscopy ; Chemistry, Organic ; Chemistry, inorganic ; Chemistry, Physical organic ; Spectroscopy ; Organic Chemistry ; Inorganic Chemistry ; Physical Chemistry
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 46 S. 25 Abb., 1 Abb. in Farbe)
    ISBN: 9783658275358
    Series Statement: essentials
    DDC: 543.2-543.8
    Language: German
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  • 10
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemistry, Organic ; Catalysis ; Organic Chemistry ; Catalysis ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIV, 101 S. 1 Abb)
    ISBN: 9783658252311
    Series Statement: BestMasters
    Uniform Title: Addition von Radikalen an Carbonyle durch Photokatalyse mit sichtbarem Licht
    DDC: 547
    Language: German
    Dissertation note: Masterarbeit Westfälische WilhelmsUniversität Münster 2017
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  • 11
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Stereochemie ; Organic chemistry ; Inorganic chemistry ; Food—Biotechnology ; Organic Chemistry ; Inorganic Chemistry ; Food Science ; Stereochemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (IX, 53 Seiten) , Illustrationen
    ISBN: 9783658280871
    Series Statement: essentials
    DDC: 547
    Language: German
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  • 12
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Massenspektrometrie ; Analytical biochemistry ; Chemistry, Organic ; Analytical Chemistry ; Organic Chemistry ; Spectroscopy and Microscopy ; Massenspektrometrie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 131 S. 61 Abb., 15 Abb. in Farbe)
    ISBN: 9783662586358
    DDC: 543
    Language: German
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  • 13
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Person(s): Ritter, Helmut
    Keywords: Makromolekulare Chemie ; Chemistry ; Organic chemistry ; Polymers ; Biomaterials ; Chemistry ; Polymer Sciences ; Organic Chemistry ; Biomaterials ; Lehrbuch ; Makromolekulare Chemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VII, 226 S. 136 Abb)
    ISBN: 9783662559567
    DDC: 541.2254
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    Language: German
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  • 14
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemie ; Englisch ; Chemie ; Deutsch ; Chemistry ; Analytical chemistry ; Inorganic chemistry ; Organic chemistry ; Physical chemistry ; Polymers ; Chemical engineering ; Chemistry ; Analytical Chemistry ; Inorganic Chemistry ; Organic Chemistry ; Physical Chemistry ; Polymer Sciences ; Industrial Chemistry ; Mehrsprachiges Wörterbuch ; Wörterbuch ; Chemie ; Englisch ; Chemie ; Deutsch
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (IX, 438 S.)
    Edition: 2., überarbeitete und erweiterte Auflage
    ISBN: 9783662563311
    DDC: 540.3
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  • 15
    Online Resource
    Online Resource
    Berlin : Springer
    Keywords: Giftpflanzen ; Gartenpflanzen ; Giftpflanzen ; Deutschland ; Mitteleuropa ; Popular works ; Organic chemistry ; Plant science ; Botany ; Nature ; Environment ; Popular Science ; Popular Science in Nature and Environment ; Plant Sciences ; Organic Chemistry ; Environment, general ; Deutschland 03.10.1990- ; Giftpflanzen ; Gartenpflanzen ; Mitteleuropa ; Giftpflanzen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XII, 256 S. 69 Abb. in Farbe)
    Edition: 2. Auflage
    ISBN: 9783662560488
    DDC: 333.7
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    Language: German
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  • 16
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Molekularbiologie ; Molekularbiologische Methode ; Life sciences ; Cytogenetics ; Organic chemistry ; Biochemistry ; Microbiology ; Electrophoresis ; Life Sciences ; Microbiology ; Organic Chemistry ; Electrophoresis ; Biochemistry, general ; Cytogenetics ; Molekularbiologie ; Molekularbiologische Methode
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XII, 83 S. 63 Abb., 4 Abb. in Farbe)
    Edition: 2., überarbeitete Auflage
    ISBN: 9783658206246
    Series Statement: essentials
    DDC: 579
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    Language: German
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  • 17
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemisches Labor ; Chemistry ; Pharmacy ; Analytical chemistry ; Organic chemistry ; Medicine ; Microbiology ; Chemistry ; Analytical Chemistry ; Organic Chemistry ; Pharmacy ; Medicine ; Microbiology ; Mehrsprachiges Wörterbuch ; Chemisches Labor
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XII, 546 S. 1 Abb)
    Edition: 3. Auflage
    ISBN: 9783662558485
    DDC: 503
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    Language: German
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  • 18
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemie ; Ingenieurwissenschaften ; Wirtschaft ; Chemistry ; Business ; Management science ; Inorganic chemistry ; Organic chemistry ; Physical chemistry ; Engineering ; Chemistry ; Inorganic Chemistry ; Organic Chemistry ; Physical Chemistry ; Engineering, general ; Business and Management, general
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XXVII, 631 Seiten)
    ISBN: 9783662528211
    DDC: 546
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    Language: German
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  • 19
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Person(s): Gey, Manfred
    Keywords: Chemie ; Analytische Chemie ; Biochemische Analyse ; Methode ; Praktikum ; Chemistry ; Analytical chemistry ; Biotechnology ; Food ; Organic chemistry ; Biochemistry ; Analytical Chemistry ; Biochemistry, general ; Organic Chemistry ; Food Science ; Analytische Chemie ; Biochemische Analyse ; Methode ; Praktikum
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XVII, 309 Seiten 304 Abb)
    ISBN: 9783662541234
    DDC: 543
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  • 20
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemie ; Chemistry ; Organic chemistry ; Organic Chemistry
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (X, 387 Seiten)
    ISBN: 9783662538524
    DDC: 547
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    Language: German
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  • 21
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemie ; Photoredox-Katalyse ; Chemistry ; Spectroscopy ; Organic chemistry ; Organic Chemistry ; Spectroscopy ; Hochschulschrift ; Photoredox-Katalyse
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XV, 129 Seiten)
    ISBN: 9783658172664
    Series Statement: BestMasters
    DDC: 547
    Language: German
    Dissertation note: Masterarbeit Westfälische Wilhelms-Universität Münster
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  • 22
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Organische Verbindungen ; Chemistry, Organic ; Organic Chemistry ; Lehrbuch ; Organische Verbindungen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 188 S. 176 Abb)
    ISBN: 9783662549681
    DDC: 547
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    Language: German
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  • 23
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemie ; Naturstoff ; Biomolekül ; Chemistry ; Organic chemistry ; Organic Chemistry ; Naturstoff ; Biomolekül
    Type of Medium: Online Resource
    Pages: 1 Online Ressource (IX, 55 Seiten)
    ISBN: 9783658154394 , 9783658154387
    Series Statement: essentials
    DDC: 547
    Language: German
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  • 24
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Person(s): Geibel, Irina
    Keywords: Chemie ; Chemistry ; Organic chemistry ; Chemical engineering ; Catalysis ; Organic Chemistry ; Industrial Chemistry ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIV, 76 Seiten 57 Abb)
    ISBN: 9783658128036 , 9783658128029
    Series Statement: BestMasters
    DDC: 547
    Language: German
    Dissertation note: Masterarbeit Carl von Ossietzky Universität Oldenburg 2014
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  • 25
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Person(s): Rakers, Lena
    Keywords: Chemie ; Chemistry ; Organic chemistry ; Medicinal chemistry ; Catalysis ; Organic Chemistry ; Medicinal Chemistry ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online Ressource (X, 124 S. 50 Abb)
    ISBN: 9783658125806 , 9783658125790
    Series Statement: BestMasters
    DDC: 547
    Language: German
    Dissertation note: Masterarbeit Westfälische Wilhelms-Universität Münster 2016
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  • 26
    Online Resource
    Online Resource
    Berlin [u.a.] : Springer Spektrum
    Keywords: Giftpflanzen ; Gartenpflanzen ; Mitteleuropa ; Deutschland ; Popular works ; Organic chemistry ; Plant science ; Botany ; Nature ; Environment ; Popular Science ; Popular Science in Nature and Environment ; Plant Sciences ; Organic Chemistry ; Environment, general ; Mitteleuropa ; Giftpflanzen ; Gartenpflanzen ; Deutschland 03.10.1990-
    Type of Medium: Online Resource
    Pages: 1 Online Ressource (IX, 207 S. 57 Abb. in Farbe)
    ISBN: 9783662471906 , 9783662471890
    DDC: 500
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  • 27
    Online Resource
    Online Resource
    Berlin [u.a.] : Springer Spektrum
    Part of " Chemie-Basiswissen"
    Keywords: Chemie ; Organische Chemie ; Chemistry ; Analytical chemistry ; Organic chemistry ; Organic Chemistry ; Analytical Chemistry ; Lehrbuch ; Organische Chemie
    Type of Medium: Online Resource
    Pages: 1 Online Ressource (XXIV, 629 S. 91 Abb)
    Edition: 7. Aufl.
    ISBN: 9783662461808 , 9783662461792
    Series Statement: Chemie-Basiswissen 2
    DDC: 547
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    Language: German
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  • 28
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemie ; Chemistry ; Organic chemistry ; Medicinal chemistry ; Catalysis ; Organic Chemistry ; Medicinal Chemistry ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XII, 108 Seiten 142 Abb)
    ISBN: 9783658126919 , 9783658126902
    Series Statement: BestMasters
    DDC: 541.395
    Language: German
    Dissertation note: Masterarbeit Westfälische Wilhelms-Universität Münster
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  • 29
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Chemie ; Chemistry ; Inorganic chemistry ; Organic chemistry ; Catalysis ; Inorganic Chemistry ; Organic Chemistry ; Hochschulschrift
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XXIII, 133 Seiten 54 Abb)
    ISBN: 9783658135744 , 9783658135737
    Series Statement: BestMasters
    DDC: 541.395
    Language: German
    Dissertation note: Masterarbeit Technische Universität München
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  • 30
    Online Resource
    Online Resource
    Wiesbaden : Springer Fachmedien Wiesbaden
    Keywords: Chemie ; Aromaten ; Katalytische Hydrierung ; Asymmetrische Reaktion ; Katalysator ; Rutheniumkomplexe ; Heterocyclische Carbene (-N) ; Chemistry ; Chemistry, Organic ; Biochemistry ; Catalysis ; Organic Chemistry ; Medicinal Chemistry ; Hochschulschrift ; Aromaten ; Katalytische Hydrierung ; Asymmetrische Reaktion ; Katalysator ; Rutheniumkomplexe ; Heterocyclische Carbene 〈-N〉
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 85 S. 16 Abb)
    ISBN: 9783658089672 , 9783658089665
    Series Statement: BestMasters
    DDC: 547
    RVK:
    Language: German
    Dissertation note: Zugl.: Münster, Univ., Masterarbeit
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  • 31
    Online Resource
    Online Resource
    Wiesbaden : Springer Fachmedien Wiesbaden
    Person(s): Massa, Werner
    Keywords: Chemie ; Kristallstrukturanalyse ; Chemistry ; Chemistry, inorganic ; Chemistry, Organic ; Mineralogy ; Biochemistry ; Materials ; Inorganic Chemistry ; Organic Chemistry ; Biochemistry, general ; Structural Materials ; Lehrbuch ; Kristallstrukturanalyse
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XII, 243 S. 109 Abb)
    Edition: 8., überarb. Aufl.
    ISBN: 9783658094126 , 9783658094119
    Series Statement: Studienbücher Chemie
    DDC: 546
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    Language: German
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  • 32
    Online Resource
    Online Resource
    Wiesbaden : Springer Fachmedien
    Keywords: Chemie ; Organische Chemie ; Chemistry ; Chemistry, Organic ; Catalysis ; Organic Chemistry ; Chemistry ; Hochschulschrift ; Organische Chemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 101 S.) , graph. Darst.
    ISBN: 9783658094089 , 9783658094072
    Series Statement: BestMasters
    DDC: 547
    Language: German
    Dissertation note: Zugl.: Hannover, Univ., Masterarbeit
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  • 33
    Online Resource
    Online Resource
    Wiesbaden : Springer Fachmedien Wiesbaden
    Keywords: Biowissenschaften ; Molekularbiologie ; Molekularbiologische Methode ; Life sciences ; Chemistry, Organic ; Microbiology ; Electrophoresis ; Life Sciences ; Organic Chemistry ; Einführung ; Molekularbiologie ; Molekularbiologische Methode
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 69 S. 59 Abb)
    ISBN: 9783658085377 , 9783658085360
    Series Statement: essentials
    DDC: 579
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  • 34
    Online Resource
    Online Resource
    Basel [u.a.] : Birkhäuser
    Keywords: Chemie ; Polymere ; Makromolekulare Chemie ; Kunststoff ; Chemistry ; Chemistry, inorganic ; Chemistry, Organic ; Polymers ; Atomic/Molecular Structure and Spectra ; Inorganic Chemistry ; Organic Chemistry ; Polymer Sciences ; Polymere ; Makromolekulare Chemie ; Kunststoff
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource
    Edition: 4., überarb. und erw. Aufl.
    ISBN: 9783764388904 , 9783764388911
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  • 35
    Online Resource
    Online Resource
    Heidelberg [u.a.] : Springer
    Keywords: Chemie ; NMR-Spektrum ; Datenauswertung ; NMR-Spektroskopie ; Datenauswertung ; Organische Verbindungen ; Analytical biochemistry ; Chemistry ; Chemistry, Organic ; Chemistry, Physical organic ; Analytical Chemistry ; Organic Chemistry ; Physical Chemistry ; Aufgabensammlung ; NMR-Spektrum ; Datenauswertung ; NMR-Spektroskopie ; Datenauswertung ; Organische Verbindungen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource
    ISBN: 9783642016820 , 9783642016837
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  • 36
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 10 (1998), S. 195-209 
    ISSN: 0899-0042
    Keywords: molecular imprinting ; molecular recognition ; chirality ; chromatography ; catalysis ; biosensor ; immunoassay ; antibody mimic ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Molecular imprinting is a technique for the fabrication of biomimetic polymeric recognition sites or “plastic antibodies/receptors” which is attracting rapidly increasing interest. By this technology, recognition matrices can be prepared which possess high substrate selectivity and specificity. In the development of this technology, several applications have been foreseen in which imprinted materials may be exchanged for natural recognition elements. Thus, molecularly imprinted polymers have been used as antibody/receptor binding mimics in immunoassay-type analyses, as enzyme mimics in catalytic applications and as recognition matrices in biosensors. The best developed application area for imprinted materials, though, has been as stationary phases for chromatography, in general, and chiral chromatography, in particular. This review seeks to highlight some of the more intriguing advantages of the technique as well as pointing out some of the difficulties encountered. The prospects for future development will also be considered. Chirality 10:195-209, 1998. © 1998 Wiley-Liss, Inc.
    Additional Material: 10 Ill.
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  • 37
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 10 (1998), S. 210-216 
    ISSN: 0899-0042
    Keywords: enantiospecific assay ; rat ; dog ; human ; enantiomer disposition ; HIV protease inhibitor ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: PNU-103017, 4-Cyano-N-(3-(cyclopropyl(5,6,7,8,9,10-hexahydro-4-hydroxy-2-oxo-2H-cycloocta(b) pyran-3-yl)methyl)phenyl)-benzenesulfonamide, is a selective HIV aspartyl protease inhibitor under evaluation as a potential oral treatment of Acquired Immunodeficiency Diseases. PNU-103017 is a racemic mixture of two enantiomers, designated PNU-103264 (R-) and PNU-103265 (S-). Stereoselective pharmacokinetics of the two enantiomers of PNU-103017 were observed in the dog, rat, and human after single and multiple dose administration of the racemate and were apparently species-dependent. Mean enantiomeric ratios of plasma concentrations (R-/S-) at each time point were greater than 1 in the dog, ranging from 1.22 to 3.06, but less than 1 in the rat and in the human, ranging from 0.44 to 0.80 and 0.23 to 0.73, respectively. A trend towards increased or decreased (farther from 1:1, R-/S-) enantiomeric ratio of plasma concentrations with time after each administration was also observed. The enantiomeric ratio remained unchanged after multiple dose administration in the rat, dog, and human although enzyme induction and increased plasma clearance were observed for both enantiomers. Chirality 10:210-216, 1998. © 1998 Wiley-Liss, Inc.
    Additional Material: 6 Ill.
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  • 38
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 10 (1998), S. 217-222 
    ISSN: 0899-0042
    Keywords: amylose ; 3,5-dimethylphenyl-carbamate ; polysaccharide phase ; tert-butyl 2-tert-butyl-4-methoxy-2,5-dihydro-1,3-imidazole-1-carboxylate; amino acid ester synthesis ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The preparative separation of the enantiomers of the title compound, a versatile chiral building block for the synthesis of unnatural amino acid esters, by high performance liquid chromatography on a chiral stationary phase (CSP), is reported for the first time. The CSP consists of amylose-(3,5-dimethylphenyl-carbamate), which has been coated onto the surface of macroporous aminopropyl-functionalized silica gel. The effect of mobile phase composition and the amount of amylose derivative on the silica gel has been thoroughly investigated. Using 2-propanol as organic modifier in hexane as mobile phase, on a semi-preparative column (200 mm × 40 mm ID, containing 192 g of stationary phase) about 200 mg of the racemate was separated per injection. Running the equipment under automatic conditions with repetitive injection mode allowed for the separation of 30 g per day. Both enantiomers were obtained with enantiopurities 〉99.75:0.25. Chirality 10:217-222, 1998. © 1998 Wiley-Liss, Inc.
    Additional Material: 5 Ill.
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  • 39
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 10 (1998), S. 223-228 
    ISSN: 0899-0042
    Keywords: thalidomide enantiomers ; in vitro kinetics ; blood distribution ; human serum albumin ; chiral inversion ; plasma protein binding ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The aim of this investigation was to elucidate the distribution and reactions of the enantiomers of thalidomide at their main site of biotransformation in vivo, i.e., in human blood. Plasma protein binding, erythrocyte: plasma distribution, and the kinetics of chiral inversion and degradation in buffer, plasma, and solutions of human serum albumin (HSA) were studied by means of a stereospecific HPLC assay. The enantiomers of thalidomide were not extensively bound to blood or plasma components. The geometric mean plasma protein binding was 55% and 66%, respectively, for (+)-(R)- and (-)-(S)-thalidomide. The corresponding geometric mean blood:plasma concentration ratios were 0.86 and 0.95 (at a haematocrit of 0.37) and erythrocyte:plasma distributions were 0.58 and 0.87. The rates of inversion and hydrolysis of the enantiomers increased with pH over the range 7.0-7.5. HSA, and to a lesser extent human plasma, catalysed the chiral inversion, but not the degradation, of (+)-(R)- and (-)-(S)-thalidomide. The addition of capric acid or preincubation of HSA with acetylsalicylic acid or physostigmine impaired the catalysis to varying extents. Correction for distribution in blood enhances previously observed differences between the pharmacokinetics of the enantiomers in vivo. The findings also support the notion that chiral inversion in vivo takes place mainly in the circulation and in albumin-rich extravascular spaces while hydrolysis occurs more uniformly in the body. In addition, the chiral inversion and hydrolysis of thalidomide apparently occur by several different mechanisms. Chirality 10:223-228, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 229-237 
    ISSN: 0899-0042
    Keywords: deuterium labelling ; menthocitronellol ; citronellol ; enantioselective multidimensional gas chromatography-mass spectrometry (enantio-MDGC-MS) ; dynamic headspace analysis ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Mechanistic aspects of the biogenesis of the chiral monoterpenoid rose oxide in Pelargonium graveolens L'Héritier are investigated using deuterium-labelled precursors. After administration of the precursors using the cut-stem method, the dynamic headspace extracts of the plants are analysed using multidimensional gas chromatography-mass spectrometry (enantio-MDGC-MS). It is unequivocally shown that this plant is able to convert citronellol and menthocitronellol into cis-/trans-rose oxide. Menthocitronellol is converted into rose oxide with a clearly detectable enantiodiscrimination. These facts may be explained with the presence of an oxidase, which is able to oxidize citronellol and menthocitronellol in allylic position. A photooxygenation mechanism including singlet oxygen as the oxidizing agent is rather unlikely. Chirality 10:229-237, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 358-361 
    ISSN: 0899-0042
    Keywords: cyclic imides ; barbiturates ; piperidine-2,6-diones ; mephenytoin ; chiral recognition ; enantioselectivity ; vancomycin chiral stationary phase ; normal-phase mode ; reversed-phase mode ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Several cyclic imidic compounds (barbiturates, piperidine-2,6-diones, and mephenytoin) are enantiomerically resolved via high-performance liquid chromatography (HPLC) on a macrocyclic antibiotic covalently bonded to a silica gel support. The Chirobiotic V chiral stationary phase (CSP) column contains the antibiotic vancomycin as the chiral selector. The results of the analysis show that the substituents at the chiral carbon position of the racemic drugs affect chiral resolution. In addition, ring size may also play a role when considering the formation of analyte-CSP inclusion complexes. Contrary to the piperidine-2,6-diones, the chromatographic parameters for the barbiturates are much the same under normal- or reversed-phase conditions. The details of these results are discussed. Chirality 10:358-361, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 364-369 
    ISSN: 0899-0042
    Keywords: (±)nicotine ; (±)nornicotine ; chiral separation ; enantiomers ; normal phase HPLC ; mobile phase additive ; cellulose-based chiral stationary phase ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: This paper describes the enantiorecognition of (±)nicotine and (±)nornicotine by high-performance liquid chromatography using two derivatized cellulose chiral stationary phases (CSPs) operated in the normal phase mode. It was found that different substituents linked to the cellulose backbone significantly influence the chiral selectivity of the derivatized CSP. The results showed that, in general, the tris(4-methylbenzoyl) cellulose CSP (Chiralcel OJ) surpasses tris(3,5-dimethylphenyl carbamoyl) cellulose CSP (Chiralcel OD). On the former column, the resolution (±)nicotine and (±)nornicotine enantiomers depended largely on mobile phase compositions. For the separation of the nicotine enantiomers, the addition of trifluoroacetic acid to a 95:5 hexane/alcohol mobile phase greatly improved the enantioresolution, probably due to enhanced hydrogen bonding interactions between the protonated analytes and the CSP. For (±)nornicotine separation, a reduction in the concentration of alcohol in the mobile phase was more effective than the addition of trifluoroacetic acid. Possible solute-mobile phase-stationary phase interactions are discussed to explain how different additives in the mobile phase and different substituents on the cellulose glucose units of the CSPs affect the separation of both pairs of enantiomers. Chirality 10:364-369, 1998. Published 1998 Wiley-Liss, Inc.This article is a US Government work and, as such, is in the public domain in the United States of America.
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    Chirality 10 (1998), S. 371-372 
    ISSN: 0899-0042
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No abstract.
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    Chirality 10 (1998), S. 373-374 
    ISSN: 0899-0042
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: No abstract.
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    Chirality 10 (1998), S. 382-395 
    ISSN: 0899-0042
    Keywords: selector/selectand associates ; hydrogen bonding ; chiral separation ; chiral phases ; enantioselectivity ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The progress made in the development of chiral stationary phases based on hydrogen-bonding selector/selectand associates is reviewed here. The structure of the different selectand/selector systems was established through X-ray diffraction and other spectroscopic techniques. The structure of the energetically more stable diastereomeric-associate was then correlated to the chromatographic results, namely to the elution order and the enantioselectivity of each of the systems. Chirality 10:382-395, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 375-381 
    ISSN: 0899-0042
    Keywords: retention mechanisms ; separation of enantiomers ; chiral stationary phases ; equilibrium isotherms ; bonding ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The retention mechanisms and the separation of enantiomers on the classes of chiral stationary phases which are made by bonding isolated groups on the surface of an adsorbent are discussed. It is shown that retention on these phases originates from mixed mechanisms and how the individual contributions of these two mechanisms can be separated, by determining and modeling the equilibrium isotherms. A contribution originating from interactions of the isomers with the nonselective sites (type-I) and another one due to interactions with the enantioselective sites (type-II) can be determined and their importance studied as a function of several parameters, e.g., temperature or pH. This approach is illustrated with results obtained with different pairs of enantiomers on bovine serum albumin, 4-methylcellulose tribenzoate, or cellobiohydrolase immobilized on silica. Chirality 10:375-381, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 396-404 
    ISSN: 0899-0042
    Keywords: chirality ; helicity ; GC-stationary phase ; conformations ; 1H-NMR-studies ; molecular mechanics calculations ; enantiomer separation ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The manner of hydrogen-bonding to peptide selectors in enantiomer separation is examined with the help of a structural model. This model relies on a C3-symmetric trispeptide selector, which is stabilized by a network of distinct intramolecular hydrogen bonds. A combination of experimental and theoretical tools enables us to identify the lowest-energy conformation of the trispeptide selector and the sites of selector-substrate interactions. Experimental tools include temperature dependent 1H-NMR studies, 1D-NOE-measurements, and titration experiments, with the theoretical tools being EFF and CFF91 molecular mechanics calculations. The structural information deduced from these investigations is shown to bear on the enantioseparation of the corresponding chiral stationary phase towards derivatized amino acids. These observations, taken together, help to rationalize the mode of enantiomer-separation by amide phases as involving predominantly C7-hydrogen bonding sites. Chirality 10:396-404, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 1-2