Ten crude oil samples, covering wide range of maturity (API = 18.5-36.1), were assembled from Safaniya, Abqiq, Ain-Dar, Wafra, Marjan, and Zulf oil fields in the area of Arabian Gulf. http://www.angkorphc.com Different analytical techniques, including liquid chromatographic separation, gas chromatography, and nuclear magnetic resonance spectroscopy, were used to characterize the oil samples. Ａngkor wat tours Some bulk and specific compositional parameters were used for oil-oil correlations in order to evaluate thermal maturation, origin, biodegradation and depositional environments of the crude oils. Considering the maturity relationships, it was suggested that the bulk composition of Wafra/Iucene crude oil was altered due to biodegradation and vertical migration. Correlation between API gravity and PAP of aromatic fraction… indicated two maturity levels of onshore and offshore oil fields. angkorphc The distribution of n-alkanes reflected the marine origin of the crude oils. Isoprenoids/n-alkanes and pristane/phytane ratios were determined by capillary GC of a middle distillate of the crude oil samples. The correlations showed that the oil samples, except for those collected from Wafra oil field, are normal mature crude oils which were deposited under oxidizing environments. https://en.wikipedia.org/wiki/Angkor The much lower Pr/Ph ratio of Wafra/Iucene oil field could be considered as an indicator of reducing depositional environments.
We constructed an efficient and reliable yeast two-hybrid detection system to evaluate the estrogenic activity of endocrine disruptors (EDs) (Lee et al., Journal of Biochemistry , 131, 2002 ). http://www.angkorphc.comThis system employs the interaction between the human estrogen receptor β (hERβ) ligand binding domain and the co-activator SRC1. Angkor nycThe extent of transcriptional activation by those chemicals correlated with estrogenic activities as measured by other assay systems. angkorphc We applied this assay system to evaluate anti-estrogenic activities and found that known antagonistic compounds, 4-hydroxytamoxifen (OHT) and ICI 182,780, effectively inhibited reporter gene induction by 17β-estradiol. We then tested the estrogenic and anti-estrogenic activities of polycyclic aromatic hydrocarbons (PAHs) using this assay… system. PAHs only weakly induced the lac Z reporter gene at higher concentrations, but clearly showed an inhibitory effect on reporter gene induction by 10 −9 M 17β-estradiol. These results suggest that PAHs are potentially anti-estrogenic and that the employed yeast detection system could be applicable to primary screening for effectors on estrogen receptor functions.
With limited natural resources and infrastructures in urban regions, rapid urbanization is arguably one of the most important challenges to sustainable development. angkorphcTo better tackle these challenges there is an urgent need for the development of new approaches where the integration of different urban infrastructural systems leads to resource savings and synergy. Specifically the development and testing of new modeling techniques emphasizing the network sustainability of integrated urban systems is warranted.Angkor wat facts Past modeling techniques such as emergy, exergy, and extended exergy analysis highlight the sustainability of the urban ecology from an accounting perspective, however there have been few research inroads in utilizing information indices for urban ecological modeling whereby… sustainability from the network perspective is evaluated. http://www.angkorphc.comThis paper proposes a conceptual model for an integrated urban waste and energy network composed of 8 compartment and 28 process flows that may be used in future studies in quantifying the sustainability of the integrated network through an emphases of the network’s overall resilience and efficiency.