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  • Organic Chemistry  (68,971)
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  • 1
    Online Resource
    Online Resource
    Berlin : Springer
    Keywords: Biologie ; Biology—Philosophy ; Philosophy of nature ; Astrobiology ; Biophysics ; Biological physics ; Organic chemistry ; Chemistry ; Philosophy of Biology ; Philosophy of Nature ; Astrobiology ; Biological and Medical Physics, Biophysics ; Organic Chemistry ; Chemistry ; Biologie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 137 Seiten)
    ISBN: 9783662623732
    DDC: 570.1
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    Language: German
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  • 2
    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 Seiten) , Illustrationen, Diagramme (teilweise farbig)
    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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  • 3
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemie ; Brandbekämpfung ; Brandschutz ; Feuerwehreinsatz ; Ionisierende Strahlung ; Gefahrstoff ; Feuerwehreinsatz ; 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 ; Chemie ; Brandbekämpfung ; Brandschutz ; Feuerwehreinsatz ; Ionisierende Strahlung ; Gefahrstoff ; Feuerwehreinsatz
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIX, 735 Seiten) , Illustrationen, Diagramme (teilweise farbig)
    ISBN: 9783662566060
    DDC: 604.7
    Language: German
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  • 4
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Massenspektrometrie ; Analytical biochemistry ; Chemistry, Organic ; Analytical Chemistry ; Organic Chemistry ; Spectroscopy and Microscopy ; Lehrbuch ; Massenspektrometrie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 131 Seiten) , Illustrationen, Diagramme
    ISBN: 9783662586358
    DDC: 543
    Language: German
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  • 5
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Periodensystem ; Geschichte ; Chemistry—History ; Inorganic chemistry ; Organic chemistry ; History of Chemistry ; Inorganic Chemistry ; Organic Chemistry ; Periodensystem ; Geschichte
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 54 Seiten) , Illustrationen, Diagramme
    ISBN: 9783658283193
    Series Statement: essentials
    DDC: 540.9
    Language: German
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  • 6
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Organische Chemie ; Katalyse ; Chemistry, Organic ; Catalysis ; Organic Chemistry ; Catalysis ; Hochschulschrift ; Organische Chemie ; Katalyse
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (X, 129 Seiten)
    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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  • 7
    Online Resource
    Online Resource
    Berlin : 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 ; Lehrbuch ; Pyrotechnik ; Feuerwerk ; Chemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VI, 90 Seiten)
    ISBN: 9783662579862
    DDC: 546
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    Language: German
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  • 8
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Person(s): Hecht, Thomas
    Keywords: Infrarotspektroskopie ; Spectroscopy ; Chemistry, Organic ; Chemistry, inorganic ; Chemistry, Physical organic ; Spectroscopy ; Organic Chemistry ; Inorganic Chemistry ; Physical Chemistry ; Infrarotspektroskopie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (VIII, 46 Seiten) , Diagramme
    ISBN: 9783658275358
    Series Statement: essentials
    DDC: 543.2-543.8
    Language: German
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  • 9
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Carbonylverbindungen ; Katalyse ; Organische Chemie ; Chemistry, Organic ; Catalysis ; Organic Chemistry ; Catalysis ; Hochschulschrift ; Carbonylverbindungen ; Katalyse ; Organische Chemie
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIV, 101 Seiten)
    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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  • 10
    Online Resource
    Online Resource
    Berlin : Springer
    Keywords: Koordinationslehre ; Homogene Katalyse ; Metallorganische Verbindungen ; Chemistry, inorganic ; Chemistry, Organic ; Inorganic Chemistry ; Organic Chemistry ; Lehrbuch ; Koordinationslehre ; Homogene Katalyse ; Metallorganische Verbindungen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XVI, 528 Seiten) , Illustrationen, Diagramme (teilweise farbig)
    Edition: 3., überarbeitete und erweiterte Auflage
    ISBN: 9783662566046
    Series Statement: Studienbücher Chemie
    DDC: 546
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    Language: German
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  • 11
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemieunterricht ; Didaktik ; Chemieunterricht ; Fachdidaktik ; Chemistry, Organic ; Analytical biochemistry ; Science / Study and teaching ; Organic Chemistry ; Analytical Chemistry ; Learning & Instruction ; Science Education ; Teaching and Teacher Education ; Lehrbuch ; Chemieunterricht ; Didaktik ; Chemieunterricht ; Fachdidaktik
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (IX, 271 Seiten) , Illustrationen, Diagramme (teilweise farbig)
    ISBN: 9783662586457
    DDC: 547
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    Language: German
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  • 12
    Online Resource
    Online Resource
    Berlin : 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, 270 Seiten) , Illustrationen (farbig)
    ISBN: 9783662603765
    DDC: 547
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    Language: German
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  • 13
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Stereochemie ; Organic chemistry ; Inorganic chemistry ; Food—Biotechnology ; Organic Chemistry ; Inorganic Chemistry ; Food Science ; Lehrbuch ; 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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  • 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 Seiten)
    Edition: 2., überarbeitete und erweiterte Auflage
    ISBN: 9783662563311
    DDC: 540.3
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    Language: German
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  • 15
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    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, 225 Seiten) , Illustrationen
    ISBN: 9783662559567
    Series Statement: Lehrbuch
    DDC: 541.2254
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    Language: German
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  • 16
    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, 545 Seiten)
    Edition: 3. Auflage
    ISBN: 9783662558485
    DDC: 503
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    Language: German
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  • 17
    Online Resource
    Online Resource
    Wiesbaden : Springer Spektrum
    Keywords: Molekularbiologische Methode ; Molekularbiologie ; Labortechnik ; Life sciences ; Cytogenetics ; Organic chemistry ; Biochemistry ; Microbiology ; Electrophoresis ; Life Sciences ; Microbiology ; Organic Chemistry ; Electrophoresis ; Biochemistry, general ; Cytogenetics ; Lehrbuch ; Molekularbiologische Methode ; Molekularbiologie ; Labortechnik
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XII, 83 Seiten) , Illustrationen, Diagramme
    Edition: 2., überarbeitete Auflage
    ISBN: 9783658206246
    Series Statement: essentials
    DDC: 579
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    Language: German
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  • 18
    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 Seiten) , Illustrationen
    Edition: 2. Auflage
    ISBN: 9783662560488
    DDC: 333.7
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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)
    ISBN: 9783662541234
    DDC: 543
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    Language: German
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  • 20
    Online Resource
    Online Resource
    Berlin : Springer Spektrum
    Keywords: Chemie ; Ingenieurwissenschaften ; Wirtschaft ; Chemie ; Chemistry ; Business ; Management science ; Inorganic chemistry ; Organic chemistry ; Physical chemistry ; Engineering ; Chemistry ; Inorganic Chemistry ; Organic Chemistry ; Physical Chemistry ; Engineering, general ; Business and Management, general ; Lehrbuch ; Chemie
    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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  • 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: Chemie ; Organische Synthese ; Chemische Reaktion ; Reaktivität ; Chemistry ; Organic chemistry ; Organic Chemistry ; Organische Synthese ; Chemische Reaktion ; Reaktivität
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (X, 387 Seiten)
    ISBN: 9783662538524
    DDC: 547
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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
    Berlin : Springer Spektrum
    Keywords: Organische Verbindungen ; Chemistry, Organic ; Organic Chemistry ; Lehrbuch ; Organische Verbindungen
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 188 Seiten) , Illustrationen
    ISBN: 9783662549681
    DDC: 547
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    Language: German
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  • 25
    Online Resource
    Online Resource
    Berlin [u.a.] : Springer Spektrum
    Part of " Chemie-Basiswissen"
    Keywords: Chemistry, Organic ; 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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  • 26
    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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  • 27
    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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  • 28
    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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  • 29
    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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  • 30
    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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  • 31
    Online Resource
    Online Resource
    Wiesbaden : Springer Fachmedien
    Keywords: Chemie ; Organische Chemie ; Ambruticine ; Biosynthese ; In vitro ; Chemistry ; Chemistry, Organic ; Catalysis ; Organic Chemistry ; Chemistry ; Hochschulschrift ; Organische Chemie ; Ambruticine ; Biosynthese ; In vitro
    Type of Medium: Online Resource
    Pages: 1 Online-Ressource (XIII, 101 S.) , graph. Darst.
    ISBN: 9783658094089 , 9783658094072
    Series Statement: BestMasters
    DDC: 547
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    Language: German
    Dissertation note: Zugl.: Hannover, Univ., Masterarbeit
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  • 32
    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
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    Dissertation note: Zugl.: Münster, Univ., Masterarbeit
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  • 33
    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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  • 34
    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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  • 35
    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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  • 36
    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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  • 37
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 10 (1998), S. 253-261 
    ISSN: 0899-0042
    Keywords: chiroptical properties ; Cotton effect ; atropisomerism ; quantum-mechanical calculation ; AM1 ; CNDO/S ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Rotational strengths calculated on the basis of quantum-mechanically obtained minimum energy geometries were used to determine the absolute configurations of axially chiral 3-aryl-4(3H)-quinazolinones from the sign of the observed Cotton effects (CEs). For the spectral data, CNDO/S calculations were used; for the geometries, ab initio (RHF/6-31G) and semiempirical (AM1) theories were used. Oscillator and rotational strengths of all excited states down to 200 nm were compared to experimental absorption and circular dichroism (CD) data. It was found that the sign of the 1Lb Cotton effects obtained for the enantiomers of methaqualone and derivatives of 3-aryl-2-alkylthio-4(3H)-quinazolinones can be correlated unambiguously with the absolute configuration. Furthermore, the sign of the Cotton effect of the π-π* transition of the thiocarbonyl chromophore of 3-aryl-2-mercapto-4(3H)-quinazolinones is suitable for a successful stereochemical correlation. Chirality 10:253-261, 1998. © 1998 Wiley-Liss, Inc.
    Additional Material: 9 Ill.
    Type of Medium: Electronic Resource
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  • 38
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Chirality 10 (1998), S. 246-252 
    ISSN: 0899-0042
    Keywords: sulfoxides ; chloroperoxidase ; asymmetric oxidation ; enantioselective ; episulfide ; gas chromatography ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Asymmetric sulfoxidation by means of a chloroperoxidase from Caldariomyces fumago and hydrogen peroxide as the oxygen source was studied for a series of sterically well-defined substrates. The stereochemistry of the sulfoxidation was the same for all substrates studied. While 2,3-dihydrobenzo[b]thiophene (1) is an excellent substrate (giving 99.5% yield and 99% e.e. of the (R)-sulfoxide), replacement of a methylene group by either a more sterically demanding group or a heteroatom caused a substantial decrease in reactivity or in reactivity as well as enantioselectivity. A further investigation of the lowered catalytic efficiency of chloroperoxidase with these substrates has been carried out in a series of competitive reactions. Thus, benzo[1,3]oxathiole (5) acted as a competitive inhibitor of the enzyme, whereas 1-thiochroman (2) and 1-thiochroman-4-one (3) were shown to be too sterically demanding to significantly compete for the active site. For the oxidation of 2, 3, and 5, it was found that in the low CPO concentration range the chemical yield after 60 min reaction time increased almost linearly with the amount of CPO used. The products from 2 and 3 could be obtained in over 80% yield with an e.e. exceeding 96%. Chloroperoxidase was also found to be an effective catalyst in the oxidation of labile episulfides, yielding the corresponding anti-sulfoxides quantitatively and giving 12% e.e. of (1R, 2R)-sulfoxide in the oxidation of propylene sulfide. Chirality 10:246-252, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 316-320 
    ISSN: 0899-0042
    Keywords: atropisomeric polychlorinated biphenyls (PCBs) ; Chirasil-Dex ; rotational barrier ; stopped-flow multidimensional gas chromatographic technique ; on-line enantiomerization kinetics ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The rotational barriers ΔG
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  • 40
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    Chirality 10 (1998), S. 321-324 
    ISSN: 0899-0042
    Keywords: NSAID ; esterification ; resolution ; Candida antarctica lipase ; rac-Indoprofen ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Lipase from Candida antarctica, commercially available immobilised on acrylic resin as Novozym® 435, allows for enantioselective esterification of rac-indoprofen (±)-1, with methanol in a dioxane-toluene solvent system. A double esterification process affords methyl ester (-)-(R)-2 in 85% e.e. and enantiopure (+)-(S)-1, both in good chemical yield. Chirality 10:321-324, 1998. © 1998 Wiley-Liss, Inc.
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  • 41
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    Chirality 10 (1998), S. 343-348 
    ISSN: 0899-0042
    Keywords: chiral asymmetry generation ; chiral autocatalysis ; primary nucleation ; secondary nucleation ; chiral cobalt complex ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Chiral asymmetry generation, the predominant production of one enantiomer in a non-chiral environment, could occur in the production of the chiral complex cis-[CoBr(NH3)(en)2]Br2 by the reaction of [Co(H2O)2{(OH)2Co(en)2}2](SO4)2 with ammonium bromide in an aqueous medium. The main kinetic steps in the reaction system have been determined. During the reaction, the product crystallizes at an early stage. When a very small amount of crystalline enantiomer was added to the reaction system at an early stage, the same enantiomer was produced preferentially; in addition, the enantiomeric excess of the product increased with increasing the stirring rate. Thus, it seems that each enantiomer generates chiral crystals that could self-replicate through secondary nucleation when the solution is stirred; these crystals in turn enhance the production of the same enantiomer. With a computer code that simulates such a kinetic mechanism, it is shown that enantiomeric excess observed in the experiments could be reproduced. Chirality 10:343-348, 1998. © 1998 Wiley-Liss, Inc.
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    Chirality 10 (1998), S. 349-357 
    ISSN: 0899-0042
    Keywords: carbenicillin ; stereoselective ; secretion ; transport ; rabbit ; membrane vesicles ; Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Stereoselectivity in the renal secretion of carbenicillin (CBPC) was studied in rabbits. Significant renal secretion of CBPC was observed in vivo, with the secretion of the S-epimer being greater than that of the R-epimer. Stereoselective transport of CBPC was further studied in vitro using basolateral and brush border membrane vesicles prepared from rabbit kidneys. The transport of CBPC by the organic anion transporter into the basolateral membrane vesicles (BLMV) was not stereoselective. In contrast, a distinct stereoselectivity was observed in the transport of CBPC by the organic anion transporter into the brush border membrane vesicles (BBMV), with the transport of the S-epimer being more favorable. Significant epimer-epimer interactions were also observed in the transport into BBMV. The stereoselectivity of the transport of CBPC was calculated from the kinetic parameters with consideration of epimer-epimer interactions and was similar to that observed in vivo. It was concluded that the observed stereoselectivity in the renal secretion of CBPC in vivo reflected that of transport via the organic anion transporter located at the brush border membrane. Chirality 10:349-357, 1998. © 1998 Wiley-Liss, Inc.
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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.
    Type of Medium: Electronic Resource