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  • 1
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    Response of Genotypes of Hyalella azteca to Zinc Toxicity (1999)
    Springer
    Details
    Publication Date: 1999-07-01
    Print ISSN: 0007-4861
    Electronic ISSN: 1432-0800
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Published by Springer
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    PAPER CURRENT
  • 2
    Electronic Resource
    Electronic Resource
    Effects of N addition rates on the productivity ofPicea sitchensis,Thuja plicata, andTsuga heterophylla seedlings (1996)
    Springer
    Trees 10 (1996), S. 189-197 
    Details
    ISSN: 1432-2285
    Keywords: Nitrogen ; Picea sitchensis ; Relative growth rates ; Thuja plicata ; Tsuga heterophylla
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Seedlings ofPicea sitchensis, Thuja plicata andTsuga heterophylla were supplied N hydroponically at one of four exponentially increasing rates of addition (0.09, 0.07, 0.05, or 0.025 gN-1 day-1) for up to 3 months in a naturally illuminated glasshouse. Relative growth rates (RGR) were analyzed as a function of N uptake, the allocation of assimilated N to foliage (LNFR), foliar N concentrations (Nla) and met assimilation rates (NAR), which were combined to estimate N productivity (RGR per unit whole-plant N concentration). Nitrogen accumulation, biomass and N partitioning and RGR and its components varied with species in response to the different N regimes.T. heterophylla had the lowest maximum wholeplant N concentrations (wpN) and specific absorption rates for N and exhibited the least plasticity in root: shoot ratios as wpN increased from 11–21 mg g-1. In all species, RGR increased linearly with wpN, while LNFR increased curvilinearly. Foliar N (Nla) increased linearly with wpN and NAR increased linearly with Nla. The RGRs ofT. heterophylla were highest at wpNs up to 18 mg g-1, a result of higher foliar N use efficiencies (NAR/Nla). However, RGR increased more with wpN inT. plicata andP. sitchensis. Although LNFR increased with wpN in all species, foliar N use efficiency declined, possibly due to an increased partitioning of foliar soluble N to non-photosynthetic compounds. Thus, in each species, N productivity did not increase above intermediate levels of wpN: 14 mg g-1 inT. heterophylla, 16 mg g-1 inP. sitchensis and 17 mg g-1 inT. plicata.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02340771
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Effects of N addition rates on the productivity ofPicea Sitchensis,Thuja plicata, andTsuga heterophylla seedlings (1996)
    Springer
    Trees 10 (1996), S. 198-205 
    Details
    ISSN: 1432-2285
    Keywords: Nitrogen ; Photosynthesis ; Picea sitchensis ; Thuja plicata ; Tsuga heterophylla
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract The effects of differing, exponentially increasing rates of N addition (0.025, 0.05, 0.07 and 0.09 gN gN-1day-1) on photosynthesis, discrimination against13C and partitioning of foliar N to chlorophyll and major photosynthetic proteins were compared in seedlings of the evergreen conifersPicea sitchensis, Thuja plicata andTsuga heterophylla. T. heterophylla had the lowest range of foliar N concentrations (Nlm). Across species, photosynthetic rates (A) increased linearly with Nlm to a maximum at 21 mg g-1 and declined at higher Nlms. Species differences inA resulted from differences in Nlm, not from differences in photosynthetic N use efficiency. Self-shading may have causedA to decline at a high Nlm inP. sitchensis andT. plicata. Measurements of gas exchange and δ13C suggested that carboxylation capacity increased more than did stomatal conductance as Nlm increased. The responses were small and confined to Nlms associated with the lesser rates of N addition. Concentrations of total protein, ribulose 1,5-bisphosphate carboxylase (RUBISCO) and the light harvesting chlorophyll a/b protein complex (LHC) increased with Nlm, but the fraction of foliar N allocated to RUBISCO and LHC increased with Nlm only inP. sitchensis and only between the 0.025 and 0.05N regimes. The responsiveness ofA and concentrations of RUBISCO to Nlm were less than reported for deciduous C3 species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02340772
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  • 4
    Electronic Resource
    Electronic Resource
    Effects of N addition rates on the productivity of Picea sitchensis, Thuja plicata, and Tsuga heterophylla seedlings (1996)
    Springer
    Trees 10 (1996), S. 189-197 
    Details
    ISSN: 0931-1890
    Keywords: Key words Nitrogen ; Picea sitchensis ; Relative growth rates ; Thuja plicata ; Tsuga heterophylla
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  Seedlings of Picea sitchensis, Thuja plicata and Tsuga heterophylla were supplied N hydroponically at one of four exponentially increasing rates of addition (0.09, 0.07, 0.05, or 0.025 gN–1 day–1) for up to 3 months in a naturally illuminated glasshouse. Relative growth rates (RGR) were analyzed as a function of N uptake, the allocation of assimilated N to foliage (LNFR), foliar N concentrations (Nla) and met assimilation rates (NAR), which were combined to estimate N productivity (RGR per unit whole-plant N concentration). Nitrogen accumulation, biomass and N partitioning and RGR and its components varied with species in response to the different N regimes. T. heterophylla had the lowest maximum whole-plant N concentrations (wpN) and specific absorption rates for N and exhibited the least plasticity in root : shoot ratios as wpN increased from 11 – 21 mg g–1. In all species, RGR increased linearly with wpN, while LNFR increased curvilinearly. Foliar N (Nla) increased linearly with wpN and NAR increased linearly with Nla. The RGRs of T. heterophylla were highest at wpNs up to 18 mg g–1, a result of higher foliar N use efficiencies (NAR/Nla). However, RGR increased more with wpN in T. plicata and P. sitchensis. Although LNFR increased with wpN in all species, foliar N use efficiency declined, possibly due to an increased partitioning of foliar soluble N to non-photosynthetic compounds. Thus, in each species, N productivity did not increase above intermediate levels of wpN: 14 mg g–1 in T. heterophylla, 16 mg g–1 in P. sitchensis and 17 mg g–1 in T. plicata.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00009647
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of N addition rates on the productivity of Picea Sitchensis, Thuja plicata, and Tsuga heterophylla seedlings (1996)
    Springer
    Trees 10 (1996), S. 198-205 
    Details
    ISSN: 0931-1890
    Keywords: Key words Nitrogen ; Photosynthesis ; Picea sitchensis ; Thuja plicata ; Tsuga heterophylla
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract  The effects of differing, exponentially increasing rates of N addition (0.025, 0.05, 0.07 and 0.09 gN gN–1day–1) on photosynthesis, discrimination against 13C and partitioning of foliar N to chlorophyll and major photosynthetic proteins were compared in seedlings of the evergreen conifers Picea sitchensis, Thuja plicata and Tsuga heterophylla. T. heterophylla had the lowest range of foliar N concentrations (Nlm). Across species, photosynthetic rates (A) increased linearly with Nlm to a maximum at 21 mg g–1 and declined at higher Nlms. Species differences in A resulted from differences in Nlm, not from differences in photosynthetic N use efficiency. Self-shading may have caused A to decline at a high Nlm in P. sitchensis and T. plicata. Measurements of gas exchange and δ13C suggested that carboxylation capacity increased more than did stomatal conductance as Nlm increased. The responses were small and confined to Nlms associated with the lesser rates of N addition. Concentrations of total protein, ribulose 1,5-bisphosphate carboxylase (RUBISCO) and the light harvesting chlorophyll a/b protein complex (LHC) increased with Nlm, but the fraction of foliar N allocated to RUBISCO and LHC increased with Nlm only in P. sitchensis and only between the 0.025 and 0.05N regimes. The responsiveness of A and concentrations of RUBISCO to Nlm were less than reported for deciduous C3 species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00009648
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  • 6
    Electronic Resource
    Electronic Resource
    A parallel contact detection algorithm for transient solid dynamics simulations using PRONTO3D (1998)
    Springer
    Computational mechanics 22 (1998), S. 143-159 
    Details
    ISSN: 1432-0924
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract An efficient, scalable, parallel algorithm for treating material surface contacts in solid mechanics finite element programs has been implemented in a modular way for multiple-instruction, multiple-data (MIMD) parallel computers. The serial contact detection algorithm that was developed previously for the transient dynamics finite element code PRONTO3D has been extended for use in parallel computation by utilizing a dynamic (adaptive) load balancing algorithm. This approach is scalable to thousands of computational nodes1
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004660050348
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  • 7
    Electronic Resource
    Electronic Resource
    Diurnal Fluctuations in Toxicity in Two Fish Species: Gambusia affinis and Notropis ludibundis (1997)
    Springer
    Bulletin of environmental contamination and toxicology 59 (1997), S. 414-421 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001289900494
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  • 8
    Electronic Resource
    Electronic Resource
    Features, aka the semantics of a formal language of manufacturing (1995)
    Springer
    Research in engineering design 7 (1995), S. 151-172 
    Details
    ISSN: 1435-6066
    Keywords: Features ; Formal language ; Semantics machining ; Shape grammar
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Technology
    Notes: Abstract Features are application and viewer-dependent interpretations of geometry. This article demonstrates how the notion of features arising out of geometric data may be formalised as the semantics of a language of shape, using machining operations as an extended example. The syntax and semantics of formal languages are discussed, with particular reference to their use in design. A simplified lathe is defined, and a parametric attributed set grammar is presented which specifies the range of shapes manufacturable on that lathe. A simple feature space is then defined, in which feature models representing those shapes may be constructed. The link between the shapes and the feature models is then formalised as the semantics of the grammar using description functions, and it is shown how the feature models develop as shape generation proceeds. Finally, some implications of this work for feature-based design and manufacturing are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01638097
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  • 9
    Electronic Resource
    Electronic Resource
    Mutagenic Activity (Ames Test) of Wood-Preserving Waste Sludge Applied to Soil (1996)
    Springer
    Bulletin of environmental contamination and toxicology 57 (1996), S. 54 -62 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s001289900155
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  • 10
    Electronic Resource
    Electronic Resource
    Establishment-year height growth in hybrid poplars; relations with longer-term growth (1996)
    Springer
    New forests 12 (1996), S. 175-186 
    Details
    ISSN: 1573-5095
    Keywords: Populus ; age-age correlations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract We examined the potential for using components of establishment-year height growth in predicting longer-term growth rankings of six hybrids of Populus deltoides × nigra and one of P. nigra × maximowiczii. Height rankings at the end of the establishment year were correlated (P ≤ 0.10) amongst the four field trials and were generally stable from 38 days after planting onward. End-of-season height rankings from field trials and a controlled environment trial were weakly correlated. Height rankings at the end of the first year did not correlate with rankings at the end of the fifth year, correlations with fifth-year ranks did improve in the second and third years. Shifts in clonal rankings after the establishment year may have been associated with (1) a decreased influence of the planted cutting on growth after the establishment year (2) clonal differences in the time of budburst which were minimized at the time of planting (3) clonal differences in late-season photosynthate allocation to roots (4) clonal differences in branching patterns and canopy development after the establishment year.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00036628
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