The Isthmus of Panama--the narrow neck of land connecting the northern and southern American landmasses--was an obligatory corridor for the Paleo-Indians as they moved into South America. Archaeological evidence suggests an unbroken link between modern natives and their Paleo-Indian ancestors in some areas of Panama, even if the surviving indigenous groups account for only 12.3% of the total po...

The pelagic brown alga Sargassum forms an oasis of biodiversity and productivity in an otherwise featureless ocean surface. The vast pool of oil resulting from the Deepwater Horizon oil spill came into contact with a large portion of the Gulf of Mexico's floating Sargassum mats. Aerial surveys performed during and after the oil spill show compelling evidence of loss and subsequent recovery of S...

For more than a decade NIST conducted research to understand, measure and predict the important features of burning oil on water. Results of that research have been included in nationally recognized guidelines for approval of intentional burning. NIST measurements and predictions have played a major role in establishing in situ burning as a primary oil spill response method. Data are given for ...

The endometrial stromal fibroblast (ESF) is a cell type present in the uterine lining of therian mammals. In the stem lineage of eutherian mammals, ESF acquired the ability to differentiate into decidual cells in order to allow embryo implantation. We call the latter cell type "neo-ESF" in contrast to "paleo-ESF" which is homologous to eutherian ESF but is not able to decidualize. In this study...

The Upper Cambrian Xixiangchi Formation in the Southern Sichuan Basin, China, has favorable hydrocarbon accumulation conditions. factors and enrichment conditions of this formation were key considerations study. By analyzing core, thin section, seismic, geochemical data, research shows that there are many sets granular crystalline dolomite reservoirs vertically, with thickness single-reservoir....

To test the hypothesis that conditioning with a practical dose of fish oil will reduce postprandial lipemia, 25 healthy men were matched according to levels of fasting plasma triacylglyceride and allocated to 6 weeks of either fish oil or olive oil supplements (5 g/day). After a 12-hour overnight fast at the termination of the study period, the subjects were given a standard test meal containin...

Resource-based theory implicitly assumes that property rights to resources are secure. Extant property rights theory enables us to relax this assumption to take into account processes where there are struggles in establishing property rights that enhance the realized economic value of resources. A case study of oil field unitization (where a single firm is designated as unit operator to develop...