distillation under pressure
41petroleum — petroleous, adj. /peuh troh lee euhm/, n. an oily, thick, flammable, usually dark colored liquid that is a form of bitumen or a mixture of various hydrocarbons, occurring naturally in various parts of the world and commonly obtained by drilling:… …
42Carbon dioxide — Carbon dioxide …
43Polyoxymethylene plastic — Polyoxymethylene (POM), in the USA also commonly known under DuPont s brand name Delrin, is an engineering plastic, a polymer with the chemical formula ( O CH2 )n . It is often marketed and used as a metal substitute. Delrin is a lightweight, low …
44medicine, history of — Introduction the development of the prevention and treatment of disease from prehistoric and ancient times to the 20th century. Medicine and surgery before 1800 Primitive (primitive culture) medicine and folklore Unwritten history is not… …
45Breathing gas — is a mixture of gaseous chemical elements and compounds used for respiration. Air is the most common and only natural breathing gas. Other artificial gases, either pure gases or mixtures of gases, are used in breathing equipment and enclosed… …
46diesel engine — a compression ignition engine in which a spray of fuel, introduced into air compressed to a temperature of approximately 1000° F (538° C), ignites at a virtually constant pressure. Also called diesel. [1890 95] * * * Internal combustion engine in …
47Paraguay — Paraguayan, adj., n. /par euh gwuy , gway /; Sp. /pah rddah gwuy /, n. 1. a republic in central South America between Bolivia, Brazil, and Argentina. 5,651,634; 157,047 sq. mi. (406,750 sq. km). Cap.: Asunción. 2. a river in central South America …
48Superheated water — is liquid water under pressure at temperatures between the usual boiling point (100°C) and the critical temperature (374°C). It is also known as subcritical water and pressurised hot water. Superheated water referred to in this article is stable… …
49plastic — plastically, plasticly, adv. /plas tik/, n. 1. Often, plastics. any of a group of synthetic or natural organic materials that may be shaped when soft and then hardened, including many types of resins, resinoids, polymers, cellulose derivatives,… …
50industrial polymers, major — Introduction chemical compounds used in the manufacture of synthetic industrial materials. In the commercial production of plastics, elastomers, man made fibres, adhesives, and surface coatings, a tremendous variety of polymers are… …
