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  • 1
    Electronic Resource
    Electronic Resource
    Prolonged simulated acid rain treatment in the subarctic: Effect on the soil respiration rate and microbial biomass (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 7-14 
    Details
    ISSN: 1432-0789
    Keywords: Key words Acid rain ; Coniferous humus ; Ergosterol ; Microbial biomass ; Muramic acid ; Soil respiration ; Subarctic areas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Humus chemistry and respiration rate, ATP, ergosterol, and muramic acid concentration as measures of chemical properties, microbial activity, biomass, and indicators of fungal and bacterial biomass were studied in a long-term acid rain experiment in the far north of Finnish Lapland. The treatments used in this study were dry control, irrigated control (spring water, pH 6), and two levels of simulated acid rain (pH 4 and pH 3). Originally (1985–1988), simulated acid rain was prepared by adding both H2SO4 and HNO3 (1.9:1 by weight). In 1989 the treatments were modified as follows. In subarea 1 the treatments continued unchanged (H2SO4+HNO3 in rain to pH 4 and pH 3), but in subarea 2 only H2SO4 was applied. The plots were sampled in 1992. The acid application affected humus chemistry by lowering the pH, cation exchange capacity, and base saturation (due to a decrease in Ca and Mg) in the treatment with H2SO4+HNO3 to pH 4 (total proton load over 8 years 2.92 kmol ha–1), whereas the microbial variables were not affected at this proton load, and only the respiration rate decreased by 20% in the strongest simulated acid rain treatment (total proton load 14.9 kmol ha–1). The different ratios of H2SO4+HNO3 in subareas 1 and 2 did not affect the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335811
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  • 2
    Electronic Resource
    Electronic Resource
    Prolonged simulated acid rain treatment in the subarctic: Effect on the soil respiration rate and microbial biomass (1996)
    Springer
    Biology and fertility of soils 23 (1996), S. 7-14 
    Details
    ISSN: 1432-0789
    Keywords: Acid rain ; Coniferous humus ; Ergosterol ; Microbial biomass ; Muramic acid ; Soil respiration ; Subarctic areas
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Humus chemistry and respiration rate, ATP, ergosterol, and muramic acid concentration as measures of chemical properties, microbial activity, biomass, and indicators of fungal and bacterial biomass were studied in a long-term acid rain experiment in the far north of Finnish Lapland. The treatments used in this study were dry control, irrigated control (spring water, pH 6), and two levels of simulated acid rain (pH 4 and pH 3). Originally (1985–1988), simulated acid rain was prepared by adding both H2SO4 and HNO3 (1.9:1 by weight). In 1989 the treatments were modified as follows. In subarea 1 the treatments continued unchanged (H2SO4+HNO3 in rain to pH 4 and pH 3), but in subarea 2 only H2SO4 was applied. The plots were sampled in 1992. The acid application affected humus chemistry by lowering the pH, cation exchange capacity, and base saturation (due to a decrease in Ca and Mg) in the treatment with H2SO4+HNO3 to pH 4 (total proton load over 8 years 2.92 kmol ha-1), whereas the microbial variables were not affected at this proton load, and only the respiration rate decreased by 20% in the strongest simulated acid rain treatment (total proton load 14.9 kmol ha-1). The different ratios of H2SO4+HNO3 in subareas 1 and 2 did not affect the results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335811
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Wood-ash fertilization and fire treatments in a Scots pine forest stand: Effects on the organic layer, microbial biomass, and microbial activity (1994)
    Springer
    Biology and fertility of soils 17 (1994), S. 57-63 
    Details
    ISSN: 1432-0789
    Keywords: Coniferous humus ; Ergosterol ; Soil respiration ; Substrate induced respiration ; Metabolic quotient ; Nitrification ; Pinus sylvestris
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract We studied the reactions of humus layer (F/H) microbial respiratory activity, microbial biomass C, and the fungal biomass, measured as the soil ergosterol content, to the application of three levels of wood ash (1000, 2500, and 5000 kg ha-1) and to fire treatment in a Scots pine (Pinus sylvestris L.) stand. Physicochemical measurements (pH, organic matter content, extractable and total C content, NH 4 + and total N content, cation-exchange capacity, base saturation) showed similarity between the fire-treated plots and those treated with the lowest dose of wood ash (1000 kg ha-1). The ash application did not change the level of microbial biomass C or fungal ergosterol when compared to the control, being around 7500 and 350 μg g-1 organic matter for the biomass C and ergosterol, respectively. The fire treatment lowered the values of both biomass measurements to about half that of the control values. The fire treatment caused a sevenfold fall in the respiration rate of fieldmoist soil to 1.8 μl h-1 g-1 organic matter compared to the values of the control or ash treatments. However, in the same soils adjusted to a water-holding capacity of 60%, the differences between the fire treatment and the control were diminished, and the ash-fertilized plots were characterized by a higher respiration rate compared to the control plots. The glucose-induced respiration reacted in the same way as the water-adjusted soil respiration. The metabolic quotient, qCO2, gradually increased from the control level with increasing applications of ash, reaching a maximum in the fire treatment. Nitrification was not observed in the treatment plots.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00418673
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    The graph of loudness recruitment (ABLB-test) (1980)
    Springer
    European archives of oto-rhino-laryngology and head & neck 226 (1980), S. 11-13 
    Details
    ISSN: 1434-4726
    Keywords: Fowler-Test ; Haarzellen ; Lautheitsausgleich ; Fowler-Test ; Hair cells ; Recruitment
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Summary The ABLB-test compares the subjective loudness in patients with unilateral sensorineural hearing loss. The graph of this comparison of loudness at different suprathreshold intensities is of interest for understanding the function of the hair cells.
    Notes: Zusammenfassung Der ABLB-Test vergleicht die subjektive Lautstärke (zwischen beiden Seiten) bei Patienten mit einseitiger sensoneuraler Hörstörung. Der Intensitätsverlauf dieses Lautheitsvergleiches ist von Interesse für das Verständnis der Funktion der Haarzellen und wird gemäß den Prinzipien der Statistik untersucht.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00455397
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Frequency composition of spontaneous cochlear emissions (1985)
    Springer
    European archives of oto-rhino-laryngology and head & neck 242 (1985), S. 43-48 
    Details
    ISSN: 1434-4726
    Keywords: Spontaneous cochlear emissions ; Sinus tones ; Hair cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Spontaneous cochlear emissions consist of one or more sinus tones. Oscillations and frequency shifts clearly widen averaged traces. Multiple peaks, if present, are spaced at intervals of 2–3‰ of the frequency, and increase with frequency. A frequency jump by the same amount was seen in one case. This appears to represent the distance between hair cells, and suggests that individual hair cells play a leading role in these oscillations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00464404
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    Paper (German National Licenses)
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