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  • 1990-1994  (1,030)
  • 1970-1974  (91)
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  • 1
    Call number: 9/M 91.1221
    In: IGCP project
    Type of Medium: Monograph available for loan
    Pages: X, 416 S.
    ISBN: 3540517928
    Series Statement: IGCP project 233
    Language: English
    Location: Reading room
    Branch Library: GFZ Library
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  • 2
    Call number: AWI G10-18-91638
    Type of Medium: Dissertations
    Pages: 184 Seiten , zahlreiche graphische Darstellungen , 1 Karte
    ISBN: 3-88452-712-6
    Series Statement: Göttinger Beiträge zur Land- und Forstwirtschaft in den Tropen und Subtropen 56
    Language: German
    Note: Zugl.: Göttingen, Univ., Diss., 1990 , Inhaltsverzeichnis: I Verzeichnis der Abbildungen. - II Verzeichnis der Tabellen. - III Anhangsverzeichnis. - IV Anlagenverzeichnis. - 1 Einleitung. - 2 Die natürlichen Gegebenheiten. - 2.1 Die Lage. - 2.2 Klima. - 2.3 Geologie und Tektonik. - 2.4 Böden 2.5 Vegetation. - 3 Zur Landschaftsgeschichte des Untersuchungsgebietes. - 3.1 Morphodynamik des Hügel-Terrassen-Reliefs. - 3.1.1 Die Entstehung der Terrassenfolge. - 3.1.2 Morphadynamischer Zyklus im Bereich des Terrassenreliefs. - 3.1.3 Morphadynamischer Zyklus im Bereich des Hügelreliefs. - 3.2 Beschreibung der Reliefelemente. - 3.3 Versuch einer landschaftsgeschichtlichen Deutung. - 3.3.1 Zeitvorstellungen. - 4 Methodik. - 4.1 Die geomorphologische Karte. - 4.1.1 Transekte und Bodenprofile. - 4.2 Rodenanalysen. - 4.3 Ergebnisse. - 4.3.1 Die HCl-Reaktion. - 4.1.2 pH-Wert. - 4.3.3 CaCO3. - 4.4.4 C-Gehalt. - 4.4.5 N-Gehalt. - 4.4.6 Textur. - 5 Bodenklassifikation. - 5.1 Die Bodeneinheiten und Subeinheiten. - 5.2 Beschreibung und Verbreitung der Bodeneinheiten. - 5.2.1 Fluvisols. - 5.2.1.1 Calcaric Fluvisols. - 5.2.2 Regosols. - 5.2.2.1 Calcaric Regosols. - 5.2.2.2 Eutric Regosols. - 5.2.3 Leptasols. - 5.2.3.1 Rendzic Leptasols. - 5.2.3.2 Mollic Leptasols. - 5.2.3.3 Eutric Leptasols. - 5.2.4 Kastanozems. - 5.2.4.1 Verti-Calcic Kastanozems. - 5.2.4.2 Rubbi-Haplic Kastanozems. - 5.2.4.3 Haplic Kastanozems. - 5.2.5 Chernozems. - 5.2.5.1 Verti-Haplic Chernozems. - 5.2.5.2 Verti-Calcic Chernozems. - 5.2.5.3 Haplic Chernozems. - 5.2.6 Vertisols. - 5.2.6.1 Calcic Vertisols. - 5.3 Bodenmorphologie. - 6 Darstellung der untersuchten Transekte. - 6.1 Einleitung. - 6.2 Transektbeschreibungen. - 6.2.1 Transekt 8 'San Rafael'. - 6.2.2 Transekt 7 'Ojo de Agua'. - 6.2.3 Transekt 5 'El Mirador'. - 6.2.4 Transekt 1 'Microondas'. - 6.2.5 Transekt 10 'El Terreno'. - 6.2.6 Transekt 4 'Emiliano Zapata'. - 6.2.7 Transekt 3 'San Angel'. - 6.2.8 Transekt 9 "La Petaca-Guadalupe'. - 7 Die Verbreitung der Bodentypen anhand der geomorphologischen Karte. - 7.1 Einleitung. - 7.2 Die geomorphologischen Einheiten und ihre Bodenvergesellschaftungen. - 7.2.1 Die Vergesellschaftung im Kolinar C3 7.2.2 Die Vergesellschaftung im Kolinar C2. - 7.2.3 Die Vergesellschaftung im Kolinar C1 7.2.4 Die Vergesellschaftung auf der T5 Terrasse. - 7.2.5 Die Vergesellschaftung auf der T4 Terrasse. - 7.2.6 Die Vergesellschaftung auf der T3 Terrasse. - 7.2.7 Die Vergesellschaftung auf der T2 Terrasse. - 7.2.8 Die Vergesellschaftung auf der T1 Terrasse. - 8 Diskussion und Schlußfolgerungen. - 8.1 Vorstellungen von der regionalen Landschaftsgeschichte. - 8.2 Entstehung von Caliche-Schotterterrassen. - 8.2.1 Die Verbreitung von Caliche-Schotterterrassen. - 8.2.2 Entstehung von mit Caliche verhärteten Schotterterrassen. - 8.2.3 Versuch einer Deutung der calichierten Schotterterrassen. - 8.3 Komplex: Terrassen-Caliche-Klima. - 8.3.1 Paläoklimatische Hypothesen für Nordmexiko und S-USA. - 8.3.2 Deutung der Befunde in der Region anhand der klimatischen Hypothesen. - 8.4 Bodengenese. - 8.5 Bodenklassifikation und einheimische Bodenbezeichnungen. - 8.6 Die Landschaftstypen in der Region. - 9 Zusammenfassung. - 10 Literaturverzeichnis. - Anhang.
    Location: AWI Reading room
    Branch Library: AWI Library
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  • 3
    Call number: MR 90.0774
    Type of Medium: Monograph available for loan
    Pages: 182 S.
    Language: German
    Location: Upper compact magazine
    Branch Library: GFZ Library
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  • 4
    Call number: AWI Bio-90-0233
    In: Antarctic research series
    Type of Medium: Monograph available for loan
    Pages: XI, 436 S. : überw. graph. Darst., Kt.
    ISBN: 0875901735
    Series Statement: Antarctic research series 49
    Branch Library: AWI Library
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  • 5
    ISSN: 1432-1157
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Whether or not there are extensional detachment faults in the Alboran basement can be tested directly because a part of the Alboran Basin is now emerged. These detachments, related to crustal thinning beneath the Alboran Basin, occurred from the Aquitanian to Tortonian. The resulting extensional geometries can be described in general terms. During the Serravalian a considerable southwest extension of the basin took place, accompanied by south-southeast extension in the northern Gibraltar Arc. Other detachments affected by Serravalian extension can be found. The spreading of the Alboran was nearly coeval with roughly westward migration of the Gibraltar mountain front.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract  Homoveratric acid (HVA) degradation was observed in cultures of Pleurotus eryngii lacking lignin peroxidase (LiP) activity. Extracellular enzymes seemed responsible for this transformation, and the lack of activity after ultrafiltration of the culture liquid suggests that the presence of some low-molecular-size compounds is required. This hypothesis is supported by rapid HVA transformation after addition of the synthetic laccase substrate 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) to the ultrafiltered liquid. HVA transformation by the extracellular enzymes from P. eryngii takes place via Cα–Cβ breakdown and formation of veratryl alcohol, which is further transformed into veratraldehyde. The same major compounds were found during HVA transformation by LiP from Phanerochaete chrysosporium, but this reaction was not stimulated by ABTS. Although the involvement of other enzymes cannot be ruled out, purified laccase from Pleurotus eryngii caused the same HVA transformation pattern in presence of ABTS. Moreover, veratryl alcohol oxidation by P. eryngii laccase was demonstrated in the presence of ABTS. These results suggest that enzymatic systems lacking LiP could be responsible for natural degradation of lignin.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary Production of extracellular hydrogen peroxide by fungal oxidases is been investigated as a requirement for lignin degradation. Aryl-alcohol oxidase activity is described in extracellular liquid and mycelium ofPleurotus eryngii and studied under non-limiting nitrogen conditions. This aryl-alcohol oxidase catalyses conversion of primary aromatic alcohols to the corresponding aldehydes and H2O2, showing no activity with aliphatic and secondary aromatic alcohols. The enzyme is stable at pH 4.0–9.0, has maximal activity at 45°–50°C and pH 6.0–6.5, is inhibited by Ag+, Pb2+ and NaN3, and has aK m of 1.2 mM using veratryl alcohol as substrate. A single protein band with aryl-alcohol oxidase activity was found in zymograms of extracellular and intracellular crude enzyme preparations fromP. eryngii.
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  • 8
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract The effect of benzyl alcohol, benzaldehyde and benzoic acid on the production of extracellular hydrogen peroxide (H2O2) by the ligninolytic fungusPleurotus eryngii was investigated. It was found that an equilibrium between oxidative and reductive reactions of these compounds is established, leading to the continuous production of H2O2. A multienzymatic cyclic system is proposed in which H2O2 is produced extracellularly by the action of aryl-alcohol oxidase on benzyl alcohol, the most abundant compound after redox reactions, and to a lower extent on benzaldehyde. The oxidation products of these reactions, benzaldehyde and benzoic acid, are reduced by intracellular dehydrogenases.
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  • 9
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Homoveratric acid (HVA) degradation was observed in cultures of Pleurotus eryngii lacking lignin peroxidase (LiP) activity. Extracellular enzymes seemed responsible for this transformation, and the lack of activity after ultrafiltration of the culture liquid suggests that the presence of some low-molecular-size compounds is required. This hypothesis is supported by rapid HVA transformation after addition of the synthetic laccase substrate 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) to the ultrafiltered liquid. HVA transformation by the extracellular enzymes from P. eryngii takes place via Cα-Cβ breakdown and formation of veratryl alcohol, which is further transformed into veratraldehyde. The same major compounds were found during HVA transformation by LiP from Phanerochaete chrysosporium, but this reaction was not stimulated by ABTS. Although the involvement of other enzymes cannot be ruled out, purified laccase from Pleurotus eryngii caused the same HVA transformation pattern in presence of ABTS. Moreover, veratryl alcohol oxidation by P. eryngii laccase was demonstrated in the presence of ABTS. These results suggest that enzymatic systems lacking LiP could be responsible for natural degradation of lignin.
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  • 10
    ISSN: 1432-0614
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Summary The kinetics of straw solid-state fermentation (SSF) with Trametes versicolor and Pleurotus ostreatus was investigated to characterize the delignification processes by these white-rot fungi. Two successive phases could be defined during straw transformation, characterized by changes in respiratory activity, changes in lignin and polysaccharide content and composition, increase in in-vitro digestibility, and enzymatic activities produced by the fungi. Lignin composition was analysed after CuO alkaline degradation, and decreases in syringyl/guaiacyl and syringyl/p-hydroxyphenyl ratios and cinnamic acid content were observed during the fungal treatment. An increase in the phenolic acid yield, revealing fungal degradation of side-chains in lignin, was produced by P. ostreatus. The highest xylanase level was produced by P. ostreatus, and exocellulase activity was nearly absent from straw treated with this fungus. Lactase activity was found in straw treated with both fungi, but lignin peroxidase was only detected during the initial phase of straw transformation with T. versicolor. High levels of H2O2-producing aryl-alcohol oxidase occurred throughout the straw SSF with P. ostreatus.
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