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  • 1
    Series available for loan
    Series available for loan
    Experimentelle Untersuchungen zur Struktur und Funktion der Bodenfauna in Waldökosystemen (1993)
    Göttingen : Forschungszentrum Waldökosysteme
    Associated volumes
    Details Availability
    Call number: ZS-015(B 32)
    In: Berichte des Forschungszentrums Waldökosysteme
    Type of Medium: Series available for loan
    Pages: 175 S.
    Series Statement: Berichte des Forschungszentrums Waldökosysteme : Reihe B Bd. 32
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 2
    Electronic Resource
    Electronic Resource
    THE DIRECTIVE INFLUENCE OF THE ALKYLSULFONAMIDO AND DIALKYLSULFONAMIDO GROUPS (1932)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 54 (1932), S. 2470-2476 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01345a042
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  • 3
    Electronic Resource
    Electronic Resource
    Rearrangements of the Polyines. V. Reactions of Bis-1,1'-(1,3-diphenylindenyl) (1933)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 55 (1933), S. 3712-3715 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01336a038
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  • 4
    Electronic Resource
    Electronic Resource
    The Oxidation of Grignard Reagents (1933)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 55 (1933), S. 1693-1696 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja01331a065
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  • 5
    Electronic Resource
    Electronic Resource
    SNMS depth profiling in oxide scales on Fe-20Cr-5Al alloys (1997)
    Springer
    Fresenius' journal of analytical chemistry 358 (1997), S. 131-134 
    Details
    ISSN: 1432-1130
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In order to investigate transport phenomena during oxide scale growth commonly a two-stage oxidation technique (16O2/18O2) is used [1–4]. In this contribution, SNMS measurements have been performed on an industrial high temperature alloy after oxidation of the material. The problem of depth calibration in this particular case is examined. It is shown that the variation of the particle density in the scale and in the substrate can be neglected and that only the variation of the sputter yield has to be taken into account. In order to validate this approach two independent techniques have been applied. First, a taper section of the sample has been prepared and a SNMS line scan has been measured. Secondly, thermogravimetric measurements have been performed to determine the scale thickness after each oxidation step.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002160050363
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  • 6
    Electronic Resource
    Electronic Resource
    A homolog of the proteasome-related RING10 gene is essential for yeast cell growth
    Amsterdam : Elsevier
    Gene 122 (1992), S. 203-206 
    Details
    ISSN: 0378-1119
    Keywords: PRG1 ; Saccharomyces cerevisiae ; antigen degradation ; proteolysis
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(92)90051-P
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  • 7
    Electronic Resource
    Electronic Resource
    Contact angle of soils as affected by depth, texture, and land management (2005)
    Oxford, UK; Malden, USA : Blackwell Science Ltd
    European journal of soil science 56 (2005), S. 0 
    Details
    ISSN: 1365-2389
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Water repellency can be a significant factor in soil physical behaviour, but little is known about the depth dependence of the contact angle of field soils. We investigated contact angles and wetting properties as a function of depth for a wide range of agricultural and forest soils in Germany. The agricultural soils ranged from silty to sandy texture (six profiles), and the forest soils ranged from sandy to loamy texture (eight profiles). Contact angles (CA) were measured with the Wilhelmy plate method (WPM). In most of the soils, advancing WPM contact angles were considerably greater than 0°  and they varied irregularly with depth. In general, sandy soils had larger WPM contact angles than silty soils. From the relation of the contact angle with texture and pH the quality of soil organic matter (SOM) was considered as more important for the wetting properties than the total amount of soil organic carbon (SOC). Finally, it was found that for soils with intermediate sand contents either under agricultural or forest use, the kind of land use seemed not to influence CA. Coarse-textured sandy soils that were used only as forest sites were more hydrophobic than silty soils which were exclusively used as agricultural soils. We conclude that a coarse texture favours, in combination with other factors (mainly pH), hydrophobic SOM.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2389.2004.00664.x
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  • 8
    Electronic Resource
    Electronic Resource
    Transverse hydraulic redistribution by a grapevine (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 28 (2005), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Root hydraulic redistribution has been shown to occur in numerous plant species under both field and laboratory conditions. To date, such water redistribution has been demonstrated in two fundamental ways, either lifting water from deep edaphic sources to dry surface soils or redistributing water downward (reverse flow) when inverted soil Ψs gradients exist. The importance of hydraulic redistribution is not well documented in agricultural ecosystems under field conditions, and would be important because water availability can be temporally and spatially constrained. Herein we report that a North American grapevine hybrid (Vitis riparia × V. berlandieri cv 420 A) growing in an agricultural ecosystem can redistribute water from a restricted zone of available water under a drip irrigation emitter, laterally across the high resistance pathways of the trunk and into roots and soils on the non-irrigated side. Deuterium-labelled water was used to demonstrate lateral movement across the vine's trunk and reverse flow into roots. Water redistribution from the zone of available water and into roots distant from the source occurred within a relatively short time frame of 36 h, although overnight deposition into rhizosphere soils around the roots was not detected. Deuterium was eventually detected in rhizosphere soils adjacent to roots on the non-irrigated side after 7 d. Application of identical amounts of water with the same deuterium enrichment level (2%) to soils without grapevine roots showed that physical transport of water through the vapour phase could not account for either downward or transverse movement of the label. These results confirmed that root presence facilitated the transport of label into soils distant from the wetted zone. When deuterium-labelled water was allowed to flow directly into the trunk above the root–trunk interface, reverse flow occurred and lateral movement across the trunk and into roots originating around the collar region did not encounter large disproportionate resistances. Rapid redistribution of water into the entire root system may have important implications for woody perennial cultivars growing where water availability is spatially heterogeneous. Under the predominantly dry soil conditions studied in this investigation, water redistributed into roots may extend root longevity and increase the vines water capacitance during periods of high transpiration demand. These benefits would be enhanced by diminished water loss from roots, and could be equally important to other cited benefits of hydraulic redistribution into soils such as enhancement of nutrient acquisition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.2004.01254.x
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  • 9
    Electronic Resource
    Electronic Resource
    The cyclic-oxidation behavior of several nickel-base single-crystal superalloys without and with coatings (1994)
    Springer
    Oxidation of metals 41 (1994), S. 271-300 
    Details
    ISSN: 1573-4889
    Keywords: cyclic oxidation ; single-crystal superalloys ; coating, reactive-element effect ; acoustic emission
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Several commerical single-crystal superalloys (CMSX-2, CMSX-3, CMSX-4, CMSX-6, SRR 99) and some laboratory versions of one of them (CMSX-4) with various Y additions were investigated concerning their cyclic-oxidation resistance in air at 1000 and 1150°C. The investigations also included two materials (CMSX-6, SRR 99) with an RT-22 coating. Weight changes and acoustic emission were recorded up to 1000 cycles and scales, coatings, and substrates were characterized by metallography, SEM, and microprobe in postexperimental investigations. The best cyclic-oxidation behavior and excellent resistance to spalling even at 1150°C were shown by a laboratory version of CMSX-4 containing between 10 and 60 ppm Y. While at 1000°C interdiffusion can be taken as tolerable for the coated alloys, there is rapid degradation of the coating by interdiffusion at 1150°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01080784
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  • 10
    Electronic Resource
    Electronic Resource
    The isothermal-oxidation behavior of several nickel-base single-crystal superalloys with and without coatings (1993)
    Springer
    Oxidation of metals 39 (1993), S. 231-261 
    Details
    ISSN: 1573-4889
    Keywords: oxidation ; single-crystal superalloys ; coating ; reactive-element effect
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Several commercial single-crystal superalloys (CMSX-2, CMSX-3, CMSX-4, CMSX-6, SRR 99) and some laboratory versions of one of them (CMSX-4) with various Y-additions were investigated concerning their oxidation resistance in air at temperatures between 800 and 1200°C. The investigations also included two materials (CMSX-6, SRR 99) with an RT-22 coating. Weight change was recorded for times of up to 1000 hr (in some cases up to 1600 hr). Oxidized coatings and substrates were characterized by metallography, SEM, and microprobe analysis. Most of the alloys showed good oxidation resistance up to 1000°C, while there was complete spalling during cooling after oxidation at 1150°C and 1200°C for the uncoated and Y-free alloys. Coated alloys were superior, however the best behavior was shown by a laboratory version of CMSX-4 containing between 10 and 60 ppm Y. Interdiffusion at 1000°C is tolerable for the coated alloys, but there was extremely rapid degradation of the coating by interdiffusion at 1200°C.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00665614
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