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  • Articles  (505)
  • Electrical and Electronics Engineering  (330)
  • acidification  (99)
  • nitrogen  (80)
  • Electrical Engineering, Measurement and Control Technology  (333)
  • Energy, Environment Protection, Nuclear Power Engineering  (172)
Collection
  • Articles  (505)
Source
Keywords
Publisher
Years
Topic
  • 1
    Electronic Resource
    Electronic Resource
    Biosensors based on the energy metabolism of living cells: The physical chemistry and cell biology of extracellular acidification
    Amsterdam : Elsevier
    Biosensors and Bioelectronics 7 (1992), S. 255-272 
    Details
    ISSN: 0956-5663
    Keywords: acidification ; biosensor ; buffer ; cell ; glycolysis ; metabolism ; microphysiometer ; pH ; receptor
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Electrical Engineering, Measurement and Control Technology , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0956-5663(92)87004-9
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  • 2
    Electronic Resource
    Electronic Resource
    Application of an ion mobility detector in radiation stimulated plasma chemistry
    Amsterdam : Elsevier
    Radiation Physics and Chemistry 42 (1993), S. 993-996 
    Details
    ISSN: 0969-806X
    Keywords: acceleration ; argon ; beta particles ; drift ; electric field ; electrons ; excited states ; ion mobility ; ions mobility ; nitrogen ; reactive species
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering , Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0969-806X(93)90419-U
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  • 3
    Electronic Resource
    Electronic Resource
    Agriculture's share in the emission of trace gases affecting the climate and some cause-oriented proposals for sufficiently reducing this share
    Amsterdam : Elsevier
    Environmental Pollution 83 (1994), S. 95-111 
    Details
    ISSN: 0269-7491
    Keywords: acidification ; agriculture ; climate change ; eutrophication ; greenhouse gases
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0269-7491(94)90027-2
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  • 4
    Electronic Resource
    Electronic Resource
    Aboveground nitrogen and phosphorus use by five plantation-grown trees with different leaf longevities (1991)
    Springer
    Biodegradation 14 (1991), S. 167-191 
    Details
    ISSN: 1572-9729
    Keywords: leaf longevity ; nitrogen ; nutrient use efficiency ; phosphorus ; requirement ; retranslocation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Aboveground nitrogen (N) and phosphorus (P) requirement, retranslocation and use efficiency were determined for 28-year-old red oak (Quercus rubra L.), European larch (Larix decidua Miller), white pine (Pinus strobes L.), red pine (Pinus resinosa Ait.) and Norway spruce (Picea abies (L) Karst.) plantations on a similar soil in southwestern Wisconsin. Annual aboveground N and P requirements (kg/ha/yr) totaled 126 and 13 for red oak, 86 and 9 for European larch, 80 and 9 for white pine, 38 and 6 for red pine, and 81 and 13 for Norway spruce, respectively. Nitrogen and P retranslocation from current foliage ranged from 81 and 72%, respectively, for European larch, whereas red pine retranslocated the smallest amount of N (13%) and Norway spruce retranslocated the smallest amount of P (18%). In three evergreen species, uptake accounted for 72 to 74% of annual N requirement whereas for two deciduous species retranslocation accounted for 76 to 77% of the annual N requirement. Nitrogen and P use (ANPP/uptake) was more efficient in deciduous species than evergreen species. The results from this common garden experiment demonstrate that differences in N and P cycling among species may result from intrinsic characteristics (e.g. leaf longevity) rather than environmental conditions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000806
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  • 5
    Electronic Resource
    Electronic Resource
    A ground water nitrogen budget for a headwater swamp in an area of permanent ground water discharge (1991)
    Springer
    Biodegradation 14 (1991), S. 209-224 
    Details
    ISSN: 1572-9729
    Keywords: ground water ; hydrology ; nitrogen ; mass balance ; nutrient retention ; swamp
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Energy, Environment Protection, Nuclear Power Engineering , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Ground water inputs and outputs of N were studied for a small ground water discharge swamp situated in a headwater drainage basin in southern Ontario, Canada. Darcy's equation with data for piezometers was used to measure inputs of shallow local ground water at the swamp margin and deep regional ground water beneath the swamp. Ground water flux was also quantified by measuring ground water discharge to the outlet stream draining the swamp in combination with a chemical mixing model to separate shallow and deep ground water components based on chloride differences. Estimates of shallow ground water flux determined by these two approaches agreed closely however, the piezometer data seriously underestimated the deep ground water input to the swamp. An average ground water input-output budget of total N (TN) total organic nitrogen (TON) ammonium (NH4 +-N) and nitrate (NO3 --N) was estimated for stream base flow periods which occurred on an average of 328 days each year during 1986–1990. Approximately 90% of the annual NO3 --N input was contributed by shallow ground water at the swamp margin. Deep ground water represented about 65% of the total ground water input and a similar proportion of TON and NH4 +-N inputs. Annual ground water NO3 --N inputs and outputs were similar whereas NH4 +-N retention was 4 kg ha-1 representing about 68% of annual ground water input. Annual TON inputs in ground water exceeded outputs by 7.7 kg ha (27%). The capacity of the swamp to regulate ground water N fluxes was influenced by the N chemistry of ground water inputs and the hydrologic pathways of transport within the swamp.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00000808
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  • 6
    Electronic Resource
    Electronic Resource
    Soil chemistry change in a lowland english deciduous Woodland 1974–1991 (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 677-682 
    Details
    ISSN: 1573-2932
    Keywords: soils ; acidification ; ancient woodland ; nitrogen ; environmental change
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This study outlines the results of analysis of soil samples collected from fixed quadrats located in a regular pattern across Wytham Wood. Oxfordshire, England. The site contains plots of mixed deciduous ancient woodland and more recent plantations. A previous soil study was undertaken in 1974 and samples archived. Soils were resampled in 1991 and some re-analysis of the 1974 samples was undertaken. Soils were of a wide range in types from sands to gravels with a pH range of 3.0–7.0. Results showed some decline in pH in lower horizons, but most striking was a large increase in soil nitrogen for all horizons and soil types.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00476907
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  • 7
    Electronic Resource
    Electronic Resource
    Deposition gradients and foliar and soil leachate concentrations of air pollutants in Scots pine stands of S.-E. Finland and the Karelian Isthmus, N.-W. Russia (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 1263-1268 
    Details
    ISSN: 1573-2932
    Keywords: air pollution ; sulphur ; nitrogen ; base cations ; throughfall ; Scots pine ; needle elements ; soil leachate ; N.-W. Russia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Bulk precipitation and throughfall analyses in 50–100-year-old Scots pine stands revealed decreasing sulphur, nitrogen, calcium and magnesium deposition gradients, which extend from the St. Petersburg-Leningrad region and N.-E. Estonia to S.-E. Finland. The Ca and Mg deposition alleviate the acidifying effect of sulphur and nitrogen. The Scots pine canopies acted as a sink for ammonium and nitrate, while the canopy interactions increased sulphur, calcium and magnesium content in throughfall. Foliar S, N and Ca concentrations correlated positively with the corresponding deposition loads. In contrast, low foliar magnesium concentrations were detected in the vicinity of St. Petersburg. The results indicate that the sulphur and calcium deposition may have increased soil leachate S and Ca concentrations in the most polluted Scots pine stands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00477155
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  • 8
    Electronic Resource
    Electronic Resource
    Pathways of chemical recovery in acidified, metal-contaminated lakes near Sudbury, Ontario, Canada (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 797-803 
    Details
    ISSN: 1573-2932
    Keywords: acidification ; recovery ; copper ; nickel ; lake ; rate ; alkalinity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper describes the recovery pathways of two lakes situated near the Coniston nickel-copper smelter. These lakes were exposed to very intense airborne pollution, including SO2, H2SO4, Ni and Cu, during the 60 year operation of the smelter. After the closure of the Coniston smelter in 1972 and the subsequent improvement in air quality, the water quality in both lakes began to improve. Despite their proximity and exposure to similar inputs, the lakes differed both in the rate and magnitude of recovery. This study demonstrates the capacity of lakes to recover from chemical stresses over a very short period. Changes in Cu and Ni concentration could be predicted, while changes in pH, measured as H+, could not. The reasons for this discrepancy as well as the processes and lake parameters that control chemical recovery are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00476927
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  • 9
    Electronic Resource
    Electronic Resource
    Lake and watershed neutralization strategies (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 889-894 
    Details
    ISSN: 1573-2932
    Keywords: acidification ; acid neutralizing capacity ; calcite ; fish ; liming ; mitigation ; ecosystems
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The Experimental Watershed Liming Study (EWLS) evaluated the application of CaCO3, to a forested watershed to mitigate the acidification of surface water. During October 1989, 6.9 Mg CaCC3/ha was applied by helicopter to two subcatchments of about 50% (102.5 ha) of the Woods Lake watershed area. The EWLS team investigated the response to treatment of soils (chemistry and microbial processes), vegetation, wetland, stream and lake waters, and phytoplankton and fish, and applied the Integrated Lake Watershed Acidification (ILWAS) model in predicting a watershed treatment duration of up to 50 years. Observations showed a gradual change in pH, acid neutralizing capacity (ANC) and Ca2+ in the water column; direct lake additions of CaCO3 (three different times) were characterized by abrupt changes following base addition and subsequent rapid reacidification. Moreover, the watershed treatment eliminated the snowmelt acidification of the near-shore region of the lake observed during direct lake treatments. Positive ANC water in the tributary and near-shore area improved conditions for fish reproduction and for a viable fish population. Budgets for 12-month periods before and after the watershed treatment showed that the lake shifted from a source of ANC to a sink due to retention of elevated inputs of Ca2+ from the watershed CaCO3 application.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00476942
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  • 10
    Electronic Resource
    Electronic Resource
    An integrated analysis of sulfur emissions, acid deposition and climate change (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 1539-1550 
    Details
    ISSN: 1573-2932
    Keywords: acidification ; air pollution impacts ; climate change ; global change ; integrated modeling ; sulfur deposition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper presents one of the first integrated analyses of acidification and climate change on a geographically-detailed basis, and the first linkage of integrated models for acid deposition (RAINS) and for climate change (IMAGE 2). Emphasis in this paper is on Europe. Trends in driving forces of emissions are used to compute anthropogenic SO2 emissions in 13 world regions. These emissions are translated into regional patterns of sulfur deposition in Europe and global patterns of sulfate aerosols using source-receptor matrices. Changes in climate are then computed based on changes in sulfate and greenhouse gases. Finally, we compute ecosystem areas affected by acid deposition and climate change based on exceedances of critical loads and changes in potential vegetation. Using this framework, information from global and regional integrated models can be used to link sulfur emissions with both their global and regional consequences. Preliminary calculations indicate that the size of European area affected by climate change in 2100 (58%) will be about the same as that affected by acid deposition in 1990. By the mid 21st century, about 14% of Europe's area may be affected by both acid deposition and climate change. Also, reducing sulfur emissions in Europe will have both the desirable impact of reducing the area affected by acid deposition, and the undesirable impact of enhancing climate warming in Europe and thus increasing the area affected by climate change. However, for the scenarios in this paper, the desirable impact of reducing sulfur emissions greatly outweighs its undesirable impact.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00477200
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