The combination of colistin and minocycline was found to be bactericidal and synergistic against A. baumannii by time-kill methods. There was no agreement between time-kill and Etest methods for synergy testing.
Studies of the energy return on investment (EROI) for oil production generally rely on aggregated statistics for large regions or countries. In order to better understand the drivers of the energy productivity of oil production, we use a novel approach that applies a detailed field-level engineering model of oil and gas production to estimate energy requirements of drilling, producing, processing, and transporting crude oil. We examine 40 global oilfields, utilizing detailed data for each field from hundreds of technical and scientific data sources. Resulting net energy return (NER) ratios for studied oil fields range from ≈2 to ≈100 MJ crude oil produced per MJ of total fuels consumed. External energy return (EER) ratios, which compare energy produced to energy consumed from external sources, exceed 1000:1 for fields that are largely self-sufficient. The lowest energy returns are found to come from thermally-enhanced oil recovery technologies. Results are generally insensitive to reasonable ranges of assumptions explored in sensitivity analysis. Fields with very large associated gas production are sensitive to assumptions about surface fluids processing due to the shifts in energy consumed under different gas treatment configurations. This model does not currently include energy invested in building oilfield capital equipment (e.g., drilling rigs), nor does it include other indirect energy uses such as labor or services.
This article examines the management of Chinese identity and culture since Singapore attained independence in 1965. Due to the delicate regional environment, ethnic Chinese identity has been closely managed by the ruling elites, which have been dominated by the English-educated Chinese. There is the evolution from a deliberate policy of maintaining a low-key ethnic Chinese profile to the recent effort to re-sinicize – in form – the majority ethnic group. The article examines the policy impulses and implications for such a landmark change in reconceptualizing the Chinese-Singapore identity, which can be attributed to the needs of regime maintenance buttressed by Confucian ethos as well as the security and economic demands of nation-building.
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