Samples of Hypogymnia enteromorpha (Ach.) Nyl. and Parmelia sulcata Tayl. were fumigated with peroxyacetyl nitrate (PAN) for 28 hours in seven days at 100 ppb and 32 hours in eight days at 50 ppb.
Foliar uptake of peroxyacetyl nitrate (PAN) was measured by the gas exchange method on nine herbaceous species. Susceptibility to PAN was also examined in the tested species in order to seek ...
Forest canopies can suck up organic nitrogen compounds produced from pollutants and turn them into useful amino acids. Paul Shepson and his colleagues at Purdue University in West Lafayette, Indiana, ...
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