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  • 1
    Electronic Resource
    Electronic Resource
    Oxidative responses in soybean foliage to herbivory by bean leaf beetle and three-cornered alfalfa hopper (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 639-650 
    Details
    ISSN: 1573-1561
    Keywords: Soybean ; lipoxygenase ; peroxidase ; polyphenol oxidase ; trypsin inhibitor ; ascorbate oxidase ; oxidative stress ; Lepidoptera ; Noctuidae ; Helicoverpa zea ; corn earworm ; Cerotoma trifurcata ; bean leaf beetle ; Coleoptera ; Chrysomelidae ; Spissistilus festinus ; three-cornered alfalfa hopper ; Homoptera ; Membracidae ; induced resistance ; interspecific competition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Variation in induced responses in soybean is shown to be dependent, in part, upon herbivore species. Herbivory by the phloem-feeding three-cornered alfalfa hopper caused increases in the activities of several oxidative enzymes including lipoxygenases, peroxidases, ascorbate oxidase, and polyphenol oxidase. Bean leaf beetle defoliation caused increased lipoxygenase activity, but had little effect upon peroxidase, polyphenol oxidase, ascorbate oxidase, or trypsin inhibitor levels in either field or greenhouse studies. In one field experiment, prior herbivory by the bean leaf beetle subsequently reduced the suitability of foliage to the corn earwormHelicoverpa zea. The contribution of these findings to emerging theories of insect-plant interactions is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02059604
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  • 2
    Electronic Resource
    Electronic Resource
    Induced resistance in soybean toHelicoverpa zea: Role of plant protein quality (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 183-198 
    Details
    ISSN: 1573-1561
    Keywords: Induced resistance ; protein quality ; Helicoverpa zea ; soybean ; Glycine max ; protease inhibitor ; lipoxygenase ; Lepidoptera ; noctuidae
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Resistance in soybean toHelicoverpa zea is comprised of both constitutive and inducible factors. In this study, we investigated the induction of resistance byH. zea in both greenhouse and field studies. In a greenhouse experiment, fourth-instarH. zea growth rates were reduced by 39% after 24 hr feeding and by 27% after 48 hr when larvae fed on previously wounded V3 foliage (cv. Forrest) compared with undamaged foliage. In a field study, the weight gain by larvae was more than 52% greater when larvae fed for 72 hr on undamaged R2/R3 soybean plants (cv. Braxton) compared to those that fed on previously wounded plants. A significant component of the induced resistance is due to a decline in the nutritional quality of foliar protein following foliar damage byH. zea. Foliar protein was extracted from damaged and undamaged foliage and incorporated into artificial diets. Larval growth was reduced 26% after four days and 49% after seven days on diets containing protein from damaged plants compared to larvae feeding on foliar protein from undamaged plants. Chemical analyses of protein quality also indicated a decline in quality in damaged plants compared to unwounded plants. Increases in lipoxygenase activity (53%), lipid peroxidation products (20%), and trypsin inhibitor content (34%) were observed in protein from wounded plants. Moreover, a 5.9% loss in free amines and 19% loss in total thiols occurred in protein from wounded plants. Larval feeding causes a significant increase in foliar lipoxygenase activity that varied among genotypes. Lipoxygenase isozymes were measured at pH 5.5, pH 7.0, and pH 8.5 in V3 stage plants of Forrest, Hark, D75-1069, and PI 417061 genotypes. Lipoxygenase activity in each genotype was significantly increased after 72 hr of larval feeding at each pH level tested, with the exception of lipoxygenase isozymes at pH 5.5 in genotype PI 417061. Larval feeding on R2/R3 stage plants (field-grown cv. Braxton) for six days also increased foliar lipoxygenase activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02066000
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  • 3
    Electronic Resource
    Electronic Resource
    Über Die Mischungslücke in flüssigen Eisen-Kupferlegierungen (1928)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 169 (1928), S. 272-272 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19281690122
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  • 4
    Electronic Resource
    Electronic Resource
    Die Rekristallisation von Blei (1930)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 190 (1930), S. 120-122 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Es wird je ein Rekristallisationsdiagramm für reinstes Blei und für ein Handelsblei aufgestellt, die Wirkung einiger Zusätze auf die Korngröße von Blei wird festgestellt.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19301900112
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  • 5
    Electronic Resource
    Electronic Resource
    Untersuchungen Über die elektrolytische Dissoziation basischer Bleisalze (1936)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 229 (1936), S. 285-299 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: In wäßrigen Lösungen von basischem Bleiperchlorat und Bleiazetat würden Überführungsmessungen, Leitfähigkeitsmessungen sowie Bestimmungen der Gefrierpunktsdepression und der Pb..-Ionenkonzentration bei verschiedenen Verdünnungen durchgeführt. Bei allen Versuchen kam auf 1 Mol Neutralsalz 1 Mol Bleioxyd.
    Additional Material: 8 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19362290306
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  • 6
    Electronic Resource
    Electronic Resource
    Über den Aufbau der Mischkristalle des Eisens mit Beryllium und Aluminium (1930)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 192 (1930), S. 337-345 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Die Eisenseiten der Gleichgewichtsdiagramme Eisen-Beryllium und Eisen-Aluminium werden nach den Ergebnissen thermischer und mikroskopischer Untersuchungen neu entworfen. Beide Systeme gehören zu der Gruppe von Eisenlegierungen mit vollständig geschlossenem γ-Feld.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19301920126
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  • 7
    Electronic Resource
    Electronic Resource
    Studien über Bleilegierungen (1931)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 198 (1931), S. 297-309 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An Blei-Cadmium-Antimonlegierungen wurde starke Härtesteigerung nach dem Abschrecken und Lagernlassen beobachtet. Das Temperatur-Konzentrationsdiagramm zwischen Blei und der Verbindung CdSb wurde in großen Zügen aufgestellt. Die Härtesteigerung von Pb-(Cd-Sb-)Legierungen wurde unter den verschiedensten Bedingungen verfolgt. Es wurde festgestellt, daß eine Kaltbearbeitung für die Härtung nicht erforderlich ist. Bei bestimmten Verhältnissen des Zusatzes von Cadmium und Antimon ist ein Abschrecken zur Erzielung der Härtung nicht nötig, es tritt Härtung nach normaler Abkühlung ein. Zinn- und Zinkzusatz wirken hemmend auf die Härtung ein.  -  Blei-Zinnlegierungen werden nach Kaltbearbeitung weicher, die größte Entfestigung tritt bei der Konzentration des Eutektikums auf.  -  Das „Sprödewerden“ von technischem Blei kurz unterhalb des Schmelzpunktes wird bedingt durch Schmelzen von Eutektika.  -  Grobkörniges Blei verhält sich unter bestimmten Bedingungen spröde, es bricht ohne merkliche Formänderung.
    Additional Material: 23 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19311980125
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  • 8
    Electronic Resource
    Electronic Resource
    Aushärtbare Blei-Nickel-Cadmiumlegierungen (1932)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 205 (1932), S. 42-42 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19322050103
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  • 9
    Electronic Resource
    Electronic Resource
    Potential role of lipoxygenases in defense against insect herbivory (1994)
    Springer
    Journal of chemical ecology 20 (1994), S. 651-666 
    Details
    ISSN: 1573-1561
    Keywords: Helicoverpa zea ; Lepidoptera ; Noctuidae ; lipoxygenase ; lipid peroxidation ; resistance ; herbivory ; soybean ; tomato ; cotton ; oxidative stress ; induced defense
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract The potential role of the plant enzyme lipoxygenase in host resistance against the corn earwormHelicoverpa zea was examined. Lipoxygenase is present in most of the common host plants ofH. zea, with highest activity in the leguminous hosts such as soybean and redbean. Treatment of dietary proteins with linoleic acid and lipoxygenase significantly reduced the nutritive quality of soybean protein and soy foliar protein. Larval growth was reduced from 24 to 63% depending upon treatment. Feeding byH. zea on soybean plants caused damage-induced increases in foliar lipoxygenase and lipid peroxidation products. Larvae feeding on previously wounded plant tissue demonstrated decreased growth rates compared to larvae feeding on unwounded tissue. Midgut epithelium from larvae feeding on wounded tissues showed evidence of oxidative damage as indicated by significant increases in lipid peroxidation products and losses in free primary amines. The potential role of oxidative and nutritional stress as a plant defensive response to herbivory is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02059605
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  • 10
    Electronic Resource
    Electronic Resource
    Röntgenstrukturanalyse des 1,3-Bis(diethylamino)-1,3-dibenzyl-2,4-diphenyl-1λ5, 3λ5-diphosphets (1992)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 609 (1992), S. 99-102 
    Details
    ISSN: 0044-2313
    Keywords: Diphosphete ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: X-Ray Crystal Structure Determination of 1,3-Bis(diethylamino)-1,3-dibenzyl-2,4-diphenyl-1λ5, 3λ5-diphospheteBenzylidene-diethylamino-benzylfuorophosphorane, 1, reacts with lithium bis(trimethylsilyl)amide to give the title compounds 2 and 1-diethylamino-2,3-diphenylphosphirane, 3. Only one of the stereoisomers of 2 is formed in which the two benzyl groups are located on the same side of the planar four-membered ring. 2 crystallizes in the monoclinic space group P21/n.
    Notes: Benzyliden-diethylamino-benzylfuorphosphoran, 1, reagiert mit Lithium-bis(trimethylsilyl)-amid zur Titelverbindung 2 und 1-Diethylamino-2,3-diphenylphosphiran, 3. Von 2 wird nur das Stereoisomer gebildet, bei dem die beiden Benzylgruppen auf der gleichen Seite des ebenen viergliedrigen Rings angeordnet sind. 2 kristallisiert in der monoklinen Raumgruppe P21/n.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19926090319
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