Presence of 1-hydroxypyrene conjugates in woody plant leaves and seasonal changes in their concentrations

Article Abstract:

Significant amounts of 1-hydroxypyrene (OHPy) conjugates in the leaves of woody plants were found in an investigation of the presence of polycyclic aromatic hydrocarbon conjugates in the leaves of roadside trees. Specifically, the existence of beta-O-glucoside and beta-O-glucuronide conjugates of OHPy was confirmed for the first time. In most plants studied, the amounts of glucuronide conjugates were greater than those of glucoside conjugates, though both were found at the highest concentrations in summer to autumn. The total amounts of the conjugates were greater than that of free OHPy in the leaves of most plants for all seasons.

Physiological aspects, Conjugation (Biology), Conjugation (Reproduction), Woody plants

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Polycyclic aromatic hydrocarbon composition and potential sources for sediment samples from the Beaufort and Barents Seas

Article Abstract:

Distributions of polycyclic aromatic hydrocarbons (PAHs) from widely distributed Arctic marine sediments are interpreted to determine potential sources, examine their anthropogenic contribution and illuminate transport pathways. Results of principal components analysis reveal a distinction between natural and anthropogenic inputs and a direct linkage between anthropogenic emissions and Arctic contamination. An 'anthropogenic combustion' pattern for soils and sediments close to cities and industrial areas was observed, while different distributions are noted further away from industrial sites.

Environmental aspects, Microbiology, Marine sediments, Barents Sea, Beaufort Sea

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Biodegradation of three- and four-ring polycyclic aromatic hydrocarbons under aerobic and denitrifying conditions

Article Abstract:

Three pseudomonad strains were used to investigate the degradation of three polycyclic aromatic hydrocarbon compounds under strict anaerobic, denitrifying conditions. Tests on the degradation of anthracene, phenanthrene and pyrene showed that the rates of anerobic degradation proceeded slower than in aerobic conditions and further added evidence to the theory that denitrification is an important step in the degradation of aromatic hydrocarbons.

Research and Development in the Physical, Engineering, and Life Sciences, Ecological Sciences, Bioremediation, Environmental sciences, Denitrification

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