fuel impurities
111Oil additive — Oil additives are chemical compounds that improve the lubricant performance of base oil (or oil base stock ). By utilizing the same base stock, many different oils can be manufactured, each with its distinctive properties. Additives comprise up… …
112chemistry — /kem euh stree/, n., pl. chemistries. 1. the science that deals with the composition and properties of substances and various elementary forms of matter. Cf. element (def. 2). 2. chemical properties, reactions, phenomena, etc.: the chemistry of… …
113smelting — Process by which a metal is obtained from its ore, either as the element or as a simple compound, usually by heating beyond the melting point, ordinarily in the presence of reducing agents such as coke or oxidizing agents such as air (see… …
114Mexican ceramics — Woman selling pottery items at the Feria de Texcoco, Texcoco, Mexico State Ceramics and pottery in Mexico date back thousands of years before the Pre Columbian period, when ceramic arts and pottery crafts developed with the first advanced… …
115boil-off — noun ( s) Etymology: boil off : the process of removing impurities (as size or gum) by boiling fabrics in a scouring solution * * * /boyl awf , of /, n. 1. Rocketry. any vapor loss from the oxidizer or fuel in a rocket during countdown. 2. Also… …
116Hydrogen — This article is about the chemistry of hydrogen. For the physics of atomic hydrogen, see Hydrogen atom. For other meanings, see Hydrogen (disambiguation). ← hydrogen → helium …
117Glossary of terms associated with diabetes — This page lists and explains terms connected with diabetes. NOTOC A *Acanthosis nigricans A brown to black, poorly defined, velvety hyperpigmentation of the skin, usually present in the posterior and lateral folds of the neck, the axilla, groin,… …
118steel — steellike, adj. /steel/, n. 1. any of various modified forms of iron, artificially produced, having a carbon content less than that of pig iron and more than that of wrought iron, and having qualities of hardness, elasticity, and strength varying …
119Shale oil extraction — Shell s experimental in situ shale oil facility, Piceance Basin, Colorado, United States Process type Chemical Industrial sector(s) Chemical industry, oil indus …
120Oxygen — This article is about the chemical element and its most stable form, O2 or dioxygen. For other forms of this element, see Allotropes of oxygen. For other uses, see Oxygen (disambiguation). nitrogen ← oxygen → fluorine ↑ O ↓ …
