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• Biodiesel — This article is about transesterified lipids. For hydrogenated alkane renewable diesel, see Vegetable oil refining. For biomass and organic waste to fuel production, see Biomass to liquid. For unmodified vegetable oil used as motor fuel, see… …   Wikipedia

• Biodiesel standard — Biodiesel has a number of standards for its quality.The European standard for biodiesel is EN 14214, which is translated into the respective national standards for each country that forms the CEN (European Committee for Standardization) area e.g …   Wikipedia

• environmental works — ▪ civil engineering Introduction       infrastructure that provides cities and towns with water supply, waste disposal, and pollution control services. They include extensive networks of reservoirs, pipelines, treatment systems, pumping stations …   Universalium

• Drake equation — This article is about Frank Drake s equation. For the Tub Ring music album, see Drake Equation (album). The Drake equation (sometimes called the Green Bank equation or the Green Bank Formula) is an equation used to estimate the number of… …   Wikipedia

• Sewage treatment — The objective of sewage treatment is to produce a disposable effluent without causing harm to the surrounding environment, and also prevent pollution.[1] Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants… …   Wikipedia

• Recurrence relation — Difference equation redirects here. It is not to be confused with differential equation. In mathematics, a recurrence relation is an equation that recursively defines a sequence, once one or more initial terms are given: each further term of the… …   Wikipedia

• Electrocardiogram — An electrocardiogram (ECG or EKG, abbreviated from the German Elektrokardiogramm ) is a noninvasive transthoracic graphic produced by an electrocardiograph, which records the electrical activity of the heart over time. Its name is made of… …   Wikipedia

• Motor oil — For the TV documentary focused on the Edmonton Oilers of the National Hockey League, see Oil Change (TV Series). Motor oil sample Motor oil or engine oil is an oil used for lubrication of various internal combustion engines. The main function is… …   Wikipedia

• USB — This article is about the computer bus to connect peripherals. For other uses of USB, see USB (disambiguation). Universal Serial Bus Original logo Type Computer Hardware Bus …   Wikipedia

• Security and safety features new to Windows Vista — There are a number of security and safety features new to Windows Vista, most of which are not available in any prior Microsoft Windows operating system release.Beginning in early 2002 with Microsoft s announcement of their Trustworthy Computing… …   Wikipedia

• Cocaine — For other uses, see Cocaine (disambiguation). Cocaine …   Wikipedia