assay metal
121Magnetic nanoparticles — are a class of nanoparticle which can be manipulated using magnetic field. Such particles commonly consist of magnetic elements such as iron, nickel and cobalt and their chemical compounds. While nanoparticles are smaller than 1 micrometer in… …
122automobile — automobilist /aw teuh meuh bee list, moh bi list/, n. /aw teuh meuh beel , aw teuh meuh beel , aw teuh moh beel, beuhl/, n. 1. a passenger vehicle designed for operation on ordinary roads and typically having four wheels and a gasoline or diesel… …
123sample preparation — ▪ chemistry Introduction in analytical chemistry (chemistry), the processes in which a representative piece of material is extracted from a larger amount and readied for analysis. Sampling and sample preparation have a unique meaning and special …
124Coal — Sedimentary Rock Anthracite coal Composition Primary carbon Secondary hydrogen, sulfur …
125Chromatography — Pictured is a sophisticated gas chromatography system. This instrument records concentrations of acrylonitrile in the air at various points throughout the chemical laboratory. Chromatography (from Greek χρῶμα chroma color and γράφειν graphein to… …
126Solder — A solder is a fusible metal alloy with a melting point or melting range of 90 to 450 °C (200 to 840 °F), used in a process called soldering where it is melted to join metallic surfaces. It is especially useful in electronics and plumbing. Alloys… …
127Dollar (United States coin) — Infobox Coin Country = United States Denomination = Dollar Value = 1 Unit = U.S. dollar Mass troy oz = 0.260 Mass = 8.100 Diameter inch = 1.043 Diameter = 26.5 Thickness inch = 0.079 Thickness = 2.00 Edge = Plain w/ incused inscriptions… …
128Portable water purification — devices – also known as point of use (POU) water treatment systems and field water disinfection techniques – are self contained units that can be used by recreational enthusiasts, military personnel, survivalists, and others who must… …
