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  • Springer  (70)
  • Elsevier  (47)
  • American Physical Society  (36)
  • 2020-2022  (58)
  • 2005-2009  (43)
  • 1995-1999  (46)
  • 1975-1979  (6)
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Keywords
Publisher
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Year
  • 1
    Electronic Resource
    Electronic Resource
    Influence of pH on nickel electrodeposition at low nickel(II) concentrations (1995)
    Springer
    Journal of applied electrochemistry 25 (1995), S. 770-775 
    Details
    ISSN: 1572-8838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract The effect of pH on the nucleation stages of nickel electrodeposition on vitreous carbon has been analysed using low nickel concentrations, without additives. The experimental results indicated that there was a change in the electrochemical response of the system at 4 〈 pH 〈 4.5. A predischarge adsorption ascribed to nickel(II) species was observed with a different surface coverage depending on the pH. Moreover, different inhibition and 3D nucleation processes were detected in varying experimental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648632
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  • 2
    Electronic Resource
    Electronic Resource
    Characterization of zinc–nickel alloys obtained from an industrial chloride bath (1998)
    Springer
    Journal of applied electrochemistry 28 (1998), S. 1113-1120 
    Details
    ISSN: 1572-8838
    Keywords: zinc–nickel electrocoatings ; characterization ; electrochemical corrosion ; residual stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Electrical Engineering, Measurement and Control Technology
    Notes: Abstract Zinc–nickel electrocoatings obtained from an industrial bath containing two additives were characterized by analysing their morphology, structure, microhardness, residual stress and corrosion resistance. Changes in deposit characteristics following the addition of saccharin were also studied. All coating, with or without saccharin, presented a good appearance, good mechanical properties and a high corrosion resistance. Moreover, by varying certain plating conditions it was observed that the deposits maintained their properties over a wide interval of experimental conditions, which suggests their suitability for use in batch bath.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003461109203
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  • 3
    Electronic Resource
    Electronic Resource
    Effect of Aphid Predators on Oviposition Behavior of Aphid Parasitoids (1998)
    Springer
    Journal of insect behavior 11 (1998), S. 297-302 
    Details
    ISSN: 1572-8889
    Keywords: aphid ; parasitoid ; Aphidius ervi ; Coccinellidae ; oviposition behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021056226037
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  • 4
    Electronic Resource
    Electronic Resource
    Micrometeorological mass balance technique for measuring CH4 emission from stored cattle slurry (1997)
    Springer
    Biology and fertility of soils 24 (1997), S. 442-444 
    Details
    ISSN: 1432-0789
    Keywords: Key words Greenhouse effect ; Methane ; Cattle slurry ; Diurnal variations ; Arrhenius equation ; Micrometerorological CH4 emission technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Methane (CH4) emissions from stored slurry were successfully measured by a micrometeorological mass balance technique. Emissions during autumn to late winter ranged from 2 to 100kgCH4-Cha–1day–1. Diurnal variations of CH4 emissions were investigated by measuring emissions at several times during the day, correlated with slurry temperatures at 10cm depth and successfully modelled with the Arrhenius equation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050270
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  • 5
    Electronic Resource
    Electronic Resource
    Field method to determine N2O emission from nitrification and denitrification (1998)
    Springer
    Biology and fertility of soils 28 (1998), S. 51-55 
    Details
    ISSN: 1432-0789
    Keywords: Key words Nitrous oxide ; Nitrification ; Denitrification ; Soil cores ; Acetylene
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Nitrous oxide (N2O) emissions via the nitrification (I nit) and denitrification (I den) pathways were successfully measured with in-field incubation of soil cores in preserving jars at 0 Pa and 5–10 Pa acetylene. From the incubations, fractions of nitrification – N2O over total N2O (I nit / I tot) – and denitrification – N2O over total N2O (I den / I tot) – were obtained. Actual field emissions of N2O via nitrification (F nit) and denitrification (F den) were calculated by multiplying the fractions from the incubation technique with the daily N2O emission (F day) determined with a direct soil cover method. The approach presented here was successful for a whole range of soil moisture conditions in intensive grassland. F nit and F den followed the trends of soil ammonium and soil nitrate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050462
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  • 6
    Electronic Resource
    Electronic Resource
    Mechanistic model for nitrous oxide emission via nitrification and denitrification (1997)
    Springer
    Biology and fertility of soils 24 (1997), S. 231-238 
    Details
    ISSN: 1432-0789
    Keywords: Key words N2O ; Mechanistic model ; Nitrification ; Denitrification ; Michaelis-Menten kinetics ; Grassland ; Spatial variablity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seasonal and annual N2O fluxes from urine-affected pasture were approximated with a mechanistic model based on Michaelis-Menten kinetics. The model combined the effects of soil nitrate-N, soil ammonium-N, soil temperature and soil moisture (all from the top 5cm) to calculate N2O emissions from nitrification (F nit ) and denitrification (F den ), with total N2O emission being the sum of the two (F tot =F nit +F den ). Best results were obtained when different kinetic parameters were used for periods of constant soil moisture conditions and after heavy rainfalls when a rapid change of the soil moisture status occurred. Modelled N2O emissions over a year were within the range of uncertainties of measured N2O emissions. Results indicate that the spatial variability of N2O emissions at times when all the model inupt variables were constant may be related to microorganism growth dynamics or enzyme production rates.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s003740050236
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  • 7
    Electronic Resource
    Electronic Resource
    Indirect interactions in aphid–parasitoid communities (1999)
    Springer
    Population ecology 41 (1999), S. 93-106 
    Details
    ISSN: 1437-5613
    Keywords: Key words Apparent competition ; Trophic cascades ; Exploitation competition ; Trophic effects ; Behavior ; Natural enemies ; Food webs
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Indirect interactions between populations of different species can be important in structuring natural communities. Indirect effects are either mediated by changes in population densities (trophic or density-mediated effects) or by changes in the behavior of species that are not trophically connected (behavioral or trait-mediated effects). We reviewed the literature on aphids and their parasitoids to explore the various possible indirect interactions that can occur in such communities. The review was motivated by our study of a particular aphid–parasitoid community in a natural (i.e., nonagricultural) habitat, and by the wealth of information that exists about aphid–parasitoid systems in agricultural settings. We focused our review on aphid–parasitoid interactions, but considered how these were influenced by the other aphid natural enemies and also by aphid mutualists and host plants. We conclude that indirect effects are likely to have a major effect in structuring aphid–parasitoid communities, and that the latter are a valuable model system for testing ideas about community interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00011986
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  • 8
    Electronic Resource
    Electronic Resource
    Stochastic p.d.e.'s arising from the long range contact and long range voter processes (1995)
    Springer
    Probability theory and related fields 102 (1995), S. 519-545 
    Details
    ISSN: 1432-2064
    Keywords: 60H25 ; 35R60
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary A long range contact process and a long range voter process are scaled so that the distance between sites decreases and the number of neighbors of each site increases. The approximate densities of occupied sites, under suitable tine scaling, converge to continuous space time densities which solve stochastic p.d.e.'s. For the contact process the limiting equation is the Kolmogorov-Petrovskii-Piscuinov equation driven by branching white noise. For the voter process the limiting equation is the heat equation driven by Fisher-Wright white noise.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01198848
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  • 9
    Electronic Resource
    Electronic Resource
    Field evidence that host selection by conopid parasitoids is related to host body size (1996)
    Springer
    Insectes sociaux 43 (1996), S. 227-233 
    Details
    ISSN: 1420-9098
    Keywords: Conopids ; Bombus ; body size ; parasitism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The body size of the host insect in which a parasitoid develops can have important effects on its development and life history. Large and small host body size have both been suggested to be advantageous to parasitoids, depending on the life-history of the species concerned. We test field data on the bumblebeeBombus terrestris and its conopid parasitoids for evidence of differences in size between parasitised and unparasitised worker bees. Bees acting as hosts for conopid parasitoids are on average larger-bodied than unparasitised bees. This result holds for bees collected in two different years, and whether bees are collected while foraging or from the nest. The results we present demonstrate differential parasitism of hosts of different body sizes, but do not necessarily indicate active host choice by conopids. However, they are in agreement with independent evidence that conopids develop more successfully in large-than in small-bodied hosts.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01242924
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  • 10
    Electronic Resource
    Electronic Resource
    Linkage studies on the human Pi, Gm, GLO, and HLA genes (1979)
    Springer
    Human genetics 〈Berlin〉 49 (1979), S. 159-166 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Linkage data of the four gene markers Pi, Gm, GLO, and HLA exclude Gm and Pi gene assignment to the short arm of chromosome 6. The findings, however, do not disprove the following gene order: HLA-GLO-centromere-Gm-Pi.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00277637
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