melting point determination

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• Melting point — For the physical processes that takes place at the melting point, see Melting, Freezing and Crystallization The melting point of a solid is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid… …   Wikipedia

• Vicat softening point — or Vicat hardness is the determination of the softening point for materials such as polyethylene, which have no definite melting point. It is taken as the temperature at which the specimen is penetrated to a depth of 1 mm by a flat ended needle… …   Wikipedia

• Thiele tube — The Thiele tube, named after the German chemist Johannes Thiele, is a laboratory glassware designed to contain and heat an oil bath. Such a setup is commonly used in the determination of the melting point of a substance. The apparatus itself… …   Wikipedia

• Tubo de Thiele — Diagrama de un tubo de Thiele: las flechas rojas muestran la dirección de las corrientes de convección …   Wikipedia Español

• Earth Sciences — ▪ 2009 Introduction Geology and Geochemistry       The theme of the 33rd International Geological Congress, which was held in Norway in August 2008, was “Earth System Science: Foundation for Sustainable Development.” It was attended by nearly… …   Universalium

• dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or …   Universalium

• liquid — liquidly, adv. liquidness, n. /lik wid/, adj. 1. composed of molecules that move freely among themselves but do not tend to separate like those of gases; neither gaseous nor solid. 2. of, pertaining to, or consisting of liquids: a liquid diet. 3 …   Universalium

• rare-earth element — /rair errth /, Chem. any of a group of closely related metallic elements, comprising the lanthanides, scandium, and yttrium, that are chemically similar by virtue of having the same number of valence electrons. Also called rare earth metal. [1955 …   Universalium

• Clifton nanolitre osmometer — setup A Clifton nanolitre osmometer is a device that allows the determination of the melting and freezing point of an aqueous solution using a sample size of only nanolitres. The device consists of a controller box, a cooling stage, and a sample… …   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

• Caesium — xenon ← caesium → barium Rb ↑ Cs ↓ Fr …   Wikipedia