جستجوی مقالات مرتبط با کلیدواژه « بایومارکر » در نشریات گروه « علوم پایه »

In this study 44 Sedimentary rock samples from the Amadeus Basin, in southern portion of the Northern Territory, Australia, were analyzed by two well-proven organic geochemical Rock-Eval (RE) pyrolysis and gas chromatography–mass spectrometry (GC–MS) analysis. These techniques were used to obtain independent parameters on organic matter composition, its thermal maturity, and environment of deposition. This study reveals a close concordance between Rock-Eval pyrolysis data and polycyclic biomarkers parameters such as steranes.RE pyrolysis in conjunction with GC–MS analysis show that the Amadeus Basin sediments contain a variable but notable organic-rich facies in the Horn Valley siltstone and prove an unequivocal evidence for Type-II organic matter, which lies dominantly to the peak stage of the conventional oil window (end of diagenesis-middle of catagenesis). The case study from the Amadeus Basin shows that these methods remain undoubtedly suitable for a good assessment of the petroleum potential of source rocks and rapid geochemical characterization of sedimentary organic matter, and can be used in other similar basins.

Persian Gulf is known as an area with great amounts of oil reservoirs and due to this fact it has lots of harmful effects; so monitoring of this area is very important and it needs simple methods that reduce cost. Catalase (CAT) and glutathione reductase (GR) as antioxidant enzymatic biomarkers were assayed in liver of mudskipper Periophthalmus waltoni in 3 different stations in Bushehr coastal waters: Soltani Inlet, Shif Island and Ameri Port which showed significant differences (P<0.05) of enzyme activity in Soltani Inlet samples. Differentiation with sexes were not significant in three stations. 1-hydroxypyrene in bile of samples showed high and significant (P<0.05) amounts of oil pollution in Soltani Inlet in compare with two other stations. These three biomarkers were verified each other and have the potential of using in future studies.