Two new bisbenzylisoquinoline alkaloids, (+)-cocsoline 2'-[beta]-Noxide (49), and (+)-12-0-methylcocsoline 2'-[beta]-N-oxide (50), were isolated from polar fractions of the roots of Anisocycla cymosa, in addition to eight known bisbenzylisoquinoline, aporphine, protoberberine, and phenanthrene
alkaloids (Kanyinda et al.
However, the abundant phenanthrenes
are the precursors of the phenanthrene
series, and retenes or pimanthrenes were derived from higher plants, which contributed to the depositional environment and origin.
The mass chromatograms of naphthalenes, phenanthrenes
and akyl derivatives of representative coal and shale extracts from the Maastrichtian Mamu Formation in the Anambra Basin are shown in Figures 4a-b and 5a-b, respectively.
These crude oil combustion samples displayed the entire distribution of PAHs typical for soot samples, from the three-ring phenanthrene
and anthracene to the seven-ringed coronene.
Di-, tri- and tetra-methylated phenanthrenes
induced MFO in fish and fish cells (Parrott et al.
If one assumes such shallow areas contain a mix of diesel, seep, and ValdezoiI, he says, then one can attribute much of any phenanthrenes
and chrysenes present to seep oil, and much of the dibenzothiophene signature to diesel.
derivatives from the orchid Coelogyne cristata.
Because of the volatilization of low-ring aromatics during the process of extraction, the tested aromatic compounds are always polycyclic aromatic hydrocarbons, including naphthalene, phenanthrene
, pyrene, chrysene, biphenyl, fluorine, fluoranthene, and so on.
The identification of hopanes, steranes, n-alkanes, phenanthrenes
, dibenzotiophenes, benzocarbazols and aromatic steroids was followed by using the gas chromatography-mass spectrometry (GC-MS) analytical technique on 30 crude oils from the Marcelina (Paleocene) reservoir at the Alturitas oil field, Maracaibo Lake Basin, Venezuela.
Major PAH components of DEP include phenanthrenes
, fluorenes, naphthalenes, fluoranthrenes, and pyrenes (7).
Veeraghavan These three well produced monographs, the first on benzo [a] pyrenes and benzo [e] pyrenes, the second on cyclopenta [a] phenanthrenes
and the third on benz [a] anthracenes are companion volumes in the Cambridge Monographs series on cancer research.
the corresponding ratio was found to be 88% and 12%, respectively .