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  • 1
    Electronic Resource
    Electronic Resource
    Leaf litter breakdown in a Mediterranean stream characterised by travertine precipitation (1999)
    Oxford, UK : Blackwell Science, Ltd
    Freshwater biology 41 (1999), S. 0 
    Details
    ISSN: 1365-2427
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: 1. Breakdown of four leaf species (Platanus orientalis, Populus nigra, Salix atrocinerea, Rubus ulmifolius) was studied in a Mediterranean second-order stream characterised by abundant travertine precipitation, a history of fire in its catchment, and a recently revegetated alluvial corridor.2. Compared to breakdown rates reported in the literature for congeneric species, breakdown of the four species was slow (k = 0.0024–0.0069 day−1 for the tree species, and 0.0103 and 0.0111 day−1 for Rubus), in spite of high water temperatures, indicating that the travertine layer that quickly covered submerged leaves impeded decomposer activity and physical fragmentation losses.3. Breakdown rates nevertheless differed between leaf species in a predictable manner, suggesting that the observed mass loss was largely due to biological processes.4. The observed tendency towards increasing leaf nitrogen and phosphorus concentrations during breakdown suggests that microorganisms were actively involved in leaf breakdown; however, this interpretation must be viewed with caution because of potentially confounding effects by nutrients contained in the travertine layer.5. Leaf breakdown of the three indigenous species was faster than that of the exotic species P. orientalis. Due to the recalcitrance of its leaves, the frequent use of Platanus in revegetation schemes following the destruction of indigenous vegetation by fire, exacerbates the negative effect of travertine precipitation on leaf breakdown and, by extension, energy flow in Mediterranean karst streams.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2427.1999.00417.x
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  • 2
    Electronic Resource
    Electronic Resource
    A histone H4 promoter for expression of a phleomycin-resistance gene in Phanerochaete chrysosporium
    Amsterdam : Elsevier
    Gene 142 (1994), S. 237-241 
    Details
    ISSN: 0378-1119
    Keywords: DNA transformation ; White rot basidiomycete ; filamentous fungus
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0378-1119(94)90267-4
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  • 3
    Electronic Resource
    Electronic Resource
    Investigation of the preparation of ^9^7Ru
    Amsterdam : Elsevier
    The @International Journal Of Applied Radiation And Isotopes 30 (1979), S. 578 
    Details
    ISSN: 0020-708X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0020-708X(79)90177-7
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  • 4
    Electronic Resource
    Electronic Resource
    Critical remarks on the-interpretation of chiral stereodifferentiation in gas chromatography
    Amsterdam : Elsevier
    Journal of Chromatography A 366 (1986), S. 385-390 
    Details
    ISSN: 0021-9673
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/S0021-9673(01)93488-0
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization of Microstructure of Plastically Deformed and Thermally Treated Carbon Steel by Means of Positron Annihilation Life-Time Spectroscopy in Comparison with Micromagnetic Methods (1996)
    s.l. ; Stafa-Zurich, Switzerland
    Materials science forum Vol. 210-213 (May 1996), p. 727-734 
    Details
    ISSN: 1662-9752
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/02/01/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.210-213.727.pdf
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  • 6
    Electronic Resource
    Electronic Resource
    Monazite in Hydrothermal Veins from Alinci, Yugoslavia (1988)
    Springer
    Mineralogy and petrology 38 (1988), S. 139-150 
    Details
    ISSN: 1438-1168
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Description / Table of Contents: Zusammenfassung Es wird ein neues Monazitvorkommen von Alinci, Jugoslawien, beschrieben. Kristallmorphologische Studien zeigten, daß die Kristalle einen plattigen Habitus nach (T01) aufweisen, eine nach Wissen der Autoren bisher unbekannte morphologische Erscheinung bei Monazit. Das Material wurde auf die Uran-, Thorium- und Seltenerdgehalte mit Gamma-Spektrometrie und induktiv gekoppelter Argonplasma-Atomabsorptions-Spektrometrie (ICPAES) analysiert. Der Monazit zeigt eine komplexe chemische Zusammensetzung, die im wesentlichen als (REE+Y,Th,U,Fe)1.001P0.988O4 angegeben werden kann. Die Ultrarotspektren und die Röntgenbeugungs-Daten stimmen mit jenen von terrestrischem Monazit überein, obwohl sie kleine strukturelle Variationen anzeigen, die durch die REE-Verteilung im Monazit von Alinci verursacht sind.
    Notes: Summary A new occurrence of monazite from Alinci, SE Yugoslavia, is described. Crystal morphology studies showed that crystals possess a platelike habit on T01 which we regard as a hitherto unknown morphological feature of monazite. The material has been analysed for uranium, thorium and rare earth element content using gamma spectrometry and inductively coupled argon-plasma atomic emission spectrometry (ICPAES). The monazite displays a complex chemical composition, essentially given as (REE+Y,Th,U,Fe)1.001P0.988O4. The infrared absorption spectra and X-ray diffraction data are in agreement with those for terrestrial monazite, although they indicate minor structural variations caused by the REE distribution in the Alinci monazite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01164318
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  • 7
    Electronic Resource
    Electronic Resource
    Sorption of ruthenium-97 on Fe2O3, Fe(OH)3 and Fe(OH)2 precipitates (1979)
    Springer
    Microchimica acta 71 (1979), S. 95-104 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Der Einfluß des pH auf die Adsorption von97Ru an Fe2O3,- Fe(OH)3-und Fe(OH)2-Niederschlägen wurde radiochemisch untersucht. Die Sorptionsmerkmale der erwähnten Adsorptionsmittel wurden festgestellt. Eisen-(II)hydroxid kann für die Anreicherung von97Ru oder allgemein von Rutheniumspuren ohne Rücksicht auf deren Oxydationsstufe verwendet werden. Der Einfluß der Berührungsdauer zwischen adsorbierendem Hydroxid und97Ru in der Lösung wurde gleichfalls untersucht.
    Notes: Summary The effect of pH on the sorption of ruthenium-97 on Fe2O3, Fe(OH)3 and Fe(OH)2 precipitates was studied by radiotracer technique. The sorption characteristics of Fe2O3, Fe(OH)3 and Fe(OH)2 sorbents have been established. Iron(II) hydroxide can be used for the preconcentration of ruthenium-97 or generally of trace amounts of ruthenium, without regard to the oxidation state of ruthenium. The effect of duration of the contact between the hydroxide sorbent and ruthenium-97 in solution was also studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197525
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  • 8
    Electronic Resource
    Electronic Resource
    Sorption of small amounts of cobalt(II) on iron(III) oxide (1979)
    Springer
    Microchimica acta 71 (1979), S. 105-112 
    Details
    ISSN: 1436-5073
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Abhängigkeit der Adsorption geringer Mengen Co (II) an Eisen (III)-hydroxid vom pH wurde untersucht und der Mechanismus der Adsorption erörtert. Eisen (III) oxidträger kann für die Anreicherung kleiner Mengen oder Spuren Co(II) verwendet werden. Der Einfluß von ÄDTA, Glycin, L(+)-Arginin und L(+)-Cystein auf die sorbierte Menge Co(II) wurde gleichfalls geprüft.
    Notes: Summary The sorption of small amounts of cobalt(II) on iron (III) oxide has been studied as a function of pH. The mechanism of sorption is discussed. Iron (III) oxide carrier can be used for the preconcentration of small or trace amounts of cobalt(II). The influence of EDTA, glycine,L(+)-arginine andL(+)-cysteine on the sorption yields of cobalt(II) has also been studied.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01197526
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  • 9
    Electronic Resource
    Electronic Resource
    Nutrient addition accelerates leaf breakdown in an alpine springbrook (2000)
    Springer
    Oecologia 122 (2000), S. 258-263 
    Details
    ISSN: 1432-1939
    Keywords: Key words Alpine springbrook ; Leaf breakdown ; Nutrient addition ; Aquatic hyphomycetes ; Macroinvertebrates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract  This study assessed the effect of nutrient enrichment on organic matter breakdown in an alpine springbrook, using alder leaf packs to which phosphorus and nitrogen were added in the form of slow-release fertilizer briquettes. The breakdown of leaf packs with nutrients added (k=0.0284 day–1) was significantly faster than that of unfertilized packs (k=0.0137 day–1), resulting in a 30% higher mass loss after 42 days. Unfertilized leaves enclosed in fine-mesh bags broke down at an even slower rate (k=0.0062 day–1). Phosphorus and nitrogen concentrations were initially higher in leaf packs with nutrients added, but this difference disappeared within 3 weeks. Fungal biomass developing in decomposing leaves was substantial (c. 55 mg dry mass per 1 g leaf dry mass) although similar between fertilized and unfertilized packs, as was the sporulation activity of aquatic hyphomycetes. There was a significantly greater number and higher biomass of macroinvertebrates (shredding nemourid stoneflies in particular) on the fertilized packs, suggesting that the increased leaf mass loss was brought about by shredder feeding.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00008854
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  • 10
    Electronic Resource
    Electronic Resource
    Fungal biomass associated with decaying leaf litter in a stream (1991)
    Springer
    Oecologia 87 (1991), S. 602-603 
    Details
    ISSN: 1432-1939
    Keywords: Aquatic Hyphomycetes ; Ergosterol ; Fungal biomass ; Leaf decomposition ; Stream
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Fungal biomass, measured as ergosterol content, was determined on alder leaf litter incubated during autumn in a softwater Pyrenean stream. The ergosterol content of the leaf litter increased rapidly to a maximum of 462 μg/g detrital dry mass. Ergosterol contents of aquatic Hyphomycetes grown in shake culture were typically ≤5 mg/g mycelial dry mass. Using the corresponding ergosterol-to-biomass conversion factor of 200, peak fungal mass accounted for 9.2% of total system mass, or 10.2% of leaf dry mass. For the period of highest activity (incubation days 7–28), net fungal production on leaf litter was estimated as 2.3 mg d−1 g−1 leaf mass. A conservative estimate of the growth efficiency for the same period was 105 mg mycelial mass per gram leaf mass degraded, assuming that non-leaf organic matter did not constitute an important carbon source supporting fungal production.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00320428
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