drag reducing agent

См. также в других словарях:

• Drag reducing agent — A drag reducing agent, also called a flow improver, is a long chain polymer chemical that is used in crude oil, refined products or non potable water pipelines. It is injected in small amounts (parts per million) and is used to reduce the… …   Wikipedia

• Drag reducer — A drag reducing agent is a long chain polymer chemical that is used in oil pipelines. It is injected in small amounts and is used to reduce the frictional pressure drop along the pipeline s lenght. The benefits of using a drag reducer are the… …   Wikipedia

• Surfactant — Surfactants are wetting agents that lower the surface tension of a liquid, allowing easier spreading, and lower the interfacial tension between two liquids. Etymology The term surfactant is a blend of surface acting agent . Surfactants are… …   Wikipedia

• DRA — Dra. is a feminine form abbreviation for Doctor (title) used in some languages, such as Spanish and Portuguese DRA is a three letter acronym that may refer to: Geography and national organizations: Democratic Republic of Armenia, a short lived… …   Wikipedia

• Lodwrick Cook — Lodwrick ( Lod ) Monroe Cook is an American businessman. Background and education Cook was born in Louisiana on June 17, 1928. He received a Bachelor s degree in mathematics from Louisiana State University in 1950. After service in the United… …   Wikipedia

• Mathematics and Physical Sciences — ▪ 2003 Introduction Mathematics       Mathematics in 2002 was marked by two discoveries in number theory. The first may have practical implications; the second satisfied a 150 year old curiosity.       Computer scientist Manindra Agrawal of the… …   Universalium

• Firefighter — Firefighters are rescuers extensively trained primarily to put out hazardous fires that threaten civilian populations and property to rescue people from car accidents, collapsed and burning buildings and other such situations. The increasing… …   Wikipedia

• drug — drug1 /drug/, n., v., drugged, drugging. n. 1. Pharm. a chemical substance used in the treatment, cure, prevention, or diagnosis of disease or used to otherwise enhance physical or mental well being. 2. (in federal law) a. any substance… …   Universalium

• Economic Affairs — ▪ 2006 Introduction In 2005 rising U.S. deficits, tight monetary policies, and higher oil prices triggered by hurricane damage in the Gulf of Mexico were moderating influences on the world economy and on U.S. stock markets, but some other… …   Universalium

• international relations — a branch of political science dealing with the relations between nations. [1970 75] * * * Study of the relations of states with each other and with international organizations and certain subnational entities (e.g., bureaucracies and political… …   Universalium

• airplane — /air playn /, n. 1. a heavier than air aircraft kept aloft by the upward thrust exerted by the passing air on its fixed wings and driven by propellers, jet propulsion, etc. 2. any similar heavier than air aircraft, as a glider or helicopter. Also …   Universalium