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Papers in Earth Sciences

Miscellaneous papers in Earth Sciences, N

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Papers 1 - 20 of 5,227 in Miscellaneous, N
  1. This paper combines the world's protected areas (PAs) under the Convention on Biological Diversity (CBD), common classification systems of ecosystem conservation status, and current knowledge on ecosystem responses to nitrogen (N) deposition to…
  2. We investigated N cycling and denitrification rates following five years of N and dolomite amendments to whole-tree harvested forest plots at the long-term soil productivity experiment in the Fernow Experimental Forest in West Virginia, USA. We…
  3. Net N mineralization, nitrification, and N uptake were monitored in the A (0-8 cm) and B (8-30 cm) soil horizons from 1997 to 1999 across a chronosequence of upland hardwood forest stands in southern Indiana, USA. Stand ages were 1, 6, 12, 31, and…
  4. We measured the 15N natural abundance values of 320 individuals belonging to 45 different plant species of the Brazilian cerrado. We also determined delta15N of soil nitrogen as a function of soil depth. Our purpose was to test the hypothesis that…
  5. The capacity of nitrifying biomass, grown in biofilms or in suspension, to reduce NO(2) (-) and NO(3) (-) under anoxic conditions was tested in batch experiments. The estimated reduction rates were 5 and 25 mg N per gram volatile suspended solids…
  6. Nitrite has been commonly recognized as an important factor causing N(2)O production, which weakened the advantages of nitrogen removal via nitrite. To reduce and control N(2)O production from wastewater treatment plants, both long-term and batch…
  7. The reaction of N(2)O(5) on sea salt aerosol is a sink for atmospheric nitrogen oxides and a source of the Cl radical. We present room-temperature measurements of the N(2)O(5) loss rate on submicron artificial seawater (ASW) aerosol, performed with…
  8. We examined the hypothesis that nutrients from land sources are enhancing the food supply for fish in coastal reefs of northwestern Cuba. Spatial variation in stable isotope ratios (13 C and 15 impacted by mixed pollution sources in Havana City,…
  9. Studies of the variation in deltaN-15 values for plants from a\nfire-prone Banksia woodland in South West Australia showed that pioneer\nherbaceous, non-mycorrhizal species which were active in nitrate\nreduction and storage, had the highest values…
  10. Cnidocytes, the stinging cells of cnidarians, optimally discharge nematocysts in response to combined physical contact and stimulation of specific chemoreceptors. In the tentacles of certain sea anemones, the primary chemoreceptors bind N-acetylated…
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