Hexane, chloroform, methanol, chloroform: methanol (2:1 v/v) and petroleum ether extracts of Turbinaria conoides from the coast of Mandapam were tested in vitro for their antibacterial activities against Escherichia coli, Salmonella typhi, Staphylococcus aureus, Pseudomonas aeruginosa and Proteus mirabilis with the disc diffusion method. Petroleum ether was the best solution for extracting the ...

Road vehicles are a key part of the climate change challenge, representing both an important source of petroleum demand and greenhouse gas (GHG) emissions worldwide. In the United States, light-duty vehicles (LDVs, i.e., cars and light trucks) alone account for 43% of petroleum demand and 23% of GHG emissions, when fuel production is considered [MacKenzie, 2013]. The United States, Europe, Chin...

Insect herbivores are considered vulnerable to extinctions of their plant hosts. Previous studies of insect-damaged fossil leaves in the US Western Interior showed major plant and insect herbivore extinction at the Cretaceous-Palaeogene (K-T) boundary. Further, the regional plant-insect system remained depressed or ecologically unbalanced throughout the Palaeocene. Whereas Cretaceous floras had...

Myanmymar aresconoidesgen n., sp. n. is described from one female in Burmese amber, dated as about 100 my. It is similar to Arescon on wing features but is unique among Mymaridae in having distinctly segmented palpi. It is the fifth mymarid genus definitely referable to the Cretaceous period. A key to Cretaceous mymarid genera is presented and the features of Myanmymar are compared with the oth...

In this paper we discuss the scenario of Petroleum Engineering projects of Petrobras, a large Brazilian governmental oil & gas company. Based on this scenario, we define a set of requirements and system architecture to guide the construction of a Collaborative Engineering Environment for assisting the control and execution of large and complex in dustrial projects in oil industry, specifically ...

From 5000 m underground to the surface, there is a multi-layer hydrocarbon reservoir under Wuerhe nose uplift in Junggar Basin. Light oil, heavy oil sand, and solid bitumen are found Permian Cretaceous strata. The normal crude present can easily ignored by explorers. To effectively exploit petroleum mineral resources Basin, geochemical characteristics of oils different layers were analyzed. It ...

A large challenging of world economic development is to meet the demand of energy consumption while reducing emissions of greenhouse gases and pollutants [1-5]. Hydrogen, as an energy carrier, is widely regarded as a potential cost effective, renewable, and clean energy alternative to petroleum, especially in the transportation sector [1]. Extensive efforts are being made to develop a sustainab...

We present an environment for executing engineering simulations and visualizing results in a Virtual Environment. The work is motivated by the necessity of finding effective solutions for collaboration of team workers during the execution of complex Petroleum Engineering projects. By means of a Scientific Workflow Management System users are able to orchestrate the execution of different simula...