knowledge of transport and degradation of polycyclic aromatic hydrocarbons (pahs) is important in assessing pah contamination of soils and water resources. the transport of naphthalene, anthracene, pyrene and phenanthrene was determined in a contaminated calcareous soil obtained from the shadegan wetland (khozestan, iran) considering a column study in laboratory conditions. the pahs were added ...

polycyclic aromatic hydrocarbons (pahs) have been determined in the atmosphere of isfahan, iran. airborne particulate matter was sampled using a high-volume air sampler at roof-top level (~6m). extraction of pahs from airborne particulate matter has been performed using sfe system and the relationship between the extraction temperature and the recovery of pahs from airborne particulates is inve...

Possible sources of terrestrial contamination are considered for the observation of polycyclic aromatic hydrocarbons (PAHs) in the Martian meteorite ALH84001. Contamination is concluded to be negligible.

Microbiological analyses of sediments located near a point source for petrogenic chemicals resulted in the isolation of a pyrene-mineralizing bacterium. This isolate was identified as a Mycobacterium sp. on the basis of its cellular and colony morphology, gram-positive and strong acid-fast reactions, diagnostic biochemical tests, 66.6% G + C content of the DNA, and high-molecular-weight mycolic...

a few people, however, who recognize a need to use the system but, for reasons of their own, choose to have a search intermediary do it for them or at least work with them on a graphical search session. At this point, therefore, it appears that the role of the search specialist has evolved away from searches originated by individual users (except in a few cases) who now can and should run their...