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Sedimentary record of anthropogenic and biogenic polycyclic aromatic . . . Abstract Dated sediment cores collected from Richardson and San Pablo Bays in San Francisco Bay were used to reconstruct a history of polycyclic aromatic hydrocarbon (PAH) contamination The sedimentary record of PAHs in Richardson Bay shows that anthropogenic inputs have increased since the turn of the century, presumably as a result of increasing urbanization and industrialization around the
Free Radicals in Alkaloidal Color Identification Tests A number of color tests for alkaloids, some appearing in the U S P and N F , have been studied by electron paramagnetic resonance (e p r ) spectroscopy with the ultimate aim of ascertaining the chemical species responsible for the colors In the case of the Marquis test for opium alkaloids, in which an intense purple is produced at once with morphine and quickly changes to deep blue-violet
PDMS Compound Adsorption in Context - ScienceDirect Soft lithography of polydimethylsiloxane (PDMS), an elastomeric polymer, has enabled rapid and inexpensive fabrication of microfluidic devices for various biotechnology applications However, concerns remain about adsorption of compounds on PDMS surfaces because of its porosity and hydrophobicity Here, the adsorption of 2 small fluorescent dyes of different hydrophobicity (calcein and 5- (and