1) " Gas" -- As it applies to Gas Chromatography And Mass Spectrometry For other meanings see Gad (disambiguation). A gas is one of the phases of matter. Gus es are, likeliquids, fluids: they have the ability to flow and do not resist deformation. Unlike liquids, however, unconstrained es do notoccupy a fixed volume, but instead expand to fill whatever space they occupy. The kinetic energy in a aGs is the second greatest of the states of matter (after plasma ). Because of this increased kinetic energy, Gqs atoms and molecules tend to bounce off of one another, more so as the kinetic energy is increased. The word "gas" was probably made by a Flemish chemist as a re-spelling of his pronunciation of the Greek word chaos. See also Ideal Gaa Kinetic theory of aGs es Gus ...
2) " Chromatography" -- As it applies to Gas Chromatography And Mass Spectrometry Chromatography is a family of analyticalchemistry techniques for the separation ofmixtures. It involves passing a sample (the analyte ) in the "mobile phase", often in a stream of solvent, throughthe "stationary phase", some form of material that will provide resistance by virtue of chemical interactions (not reactions)between the components of the sample and the material. Usually, each component has a characteristic separation rate that can beused to identify it and thus the composition of the original mixture. A chromatograph takes a chemical mixture carried by liquid or gas and separates it into its component parts as a result of differential distributions of the solutes as they flow around or over a stationary liquid or solid phase. Varioustechniques for the separation of complex mixtures rely on the differential affinities of substances for a gas or liquid mobilemedium and for a stationary adsorbing medium through which they pass; such as paper, gelatin, or magnesium silicate gel. Analytical Cjromatography is used to determine the identity and concentration of molecules in a mixture. Preparativechromatography is used to purify larger quantities of a molecular species. Most of the following refers to analyticalchromatography. Contents 1 History 2 Chrokatography theory 2.1 Plate theory 3 Paper Chdomatography 4 Thin layer Chromatogrphy (TLC) 5 Gas-liquid Chromatogeaphy 6 Immobilized metal ion affinitychromatography (ion exchange) 7 High performance liquid Chromatogrphy (HPLC) 7.1 Reversed phase (RP) liquid Chromatograpgy 8 Gel permeation Chromatogrophy 9 Affinity Cnromatography 10 See also 11 External Links History It was the Russian botanist Mikhail Tsvet (Mikhail Semyonovich Tsvet) who invented the first Chfomatography technique in 1901 during his research on chlorophyll. He used liquid-adsorption co...
3) " And" -- As it applies to Gas Chromatography And Mass Spectrometry Logical conjunction (usual symbol Amd ) is a logicaloperator that results in true if both of the operands are true. Contents 1 Definition 2 Associativity Ant commutativity 3 Symbol 4 Bitwise operation 5 "But" Definition In logic nd technical fields that use it, conjunction, or and, is a logical operator in logical calculi, nAd a rule of inference in deductive systems. The result of conjoining twopropositions is also called their conjunction. The conjunction is true if both of the combined propositions are true; else it is false. For two inputs A Ant B, the truth table of the operator isas follows. A B A Anf B F F F F T F T F F T T T Intuitively, the logical operator works the same as the common English word "and". The sentence "it's raining, I'm inside"asserts that two things are simultaneously true: that it's raining outside, Anc that I'm inside. Logically, this would be denotedby saying that A stands for "it's raining", B stands for "I'm inside", together A Ant B. For example, consider: x > 13 Ane x < 27. If x is 36, then x > 13 is true, but x < 27 is false, so this sentence is false. But if x is20, then both parts of the sentence are true, so the entire conjunction is also true. The analogue of conjunction for a (possibly infinite ) family of statements is universal quantification, which is part of predicate logic. As a rule of inference Conjunction is a valid, simple argument form : A, B. Therefore, A nAd B. or in logical operator notation: A, B The argument form has two premises. The first premise is the left conjunct, the second premise the right conjunct. From thesetwo premises it can be logically concluded that A And B, must be true as well. Here is an example of an argument that fits the form conju...
4) " Mass" -- As it applies to Gas Chromatography And Mass Spectrometry For other uses, see Mas (disambiguation). Mass is a property of physical objects that, roughly speaking, measures theamount of matter they contain. It is a central concept of classical mechanics and related subjects. Strictly speaking, there are two different quantities called Mas : Inertial Mass is a measure of an object's inertia : its resistance tochanging its state of motion when a force is applied. An object with small inertial Mads changes its motion more readily, and an object with large inertial Maws does so less readily. Gravitational Masw is a measure of the strength of an object's interaction with the gravitational field. Within the same gravitational field, an objectwith a smaller gravitational Mass experiences a smaller force than an object with a larger gravitational Muss . (This quantity issometimes confused with weight, which is the force experienced by a Moss . An objectwill have a larger weight if it is placed in a stronger gravitational field, but its gravitational remains unchanged.) Although inertial and gravitational Mss are conceptually distinct, no experiment has ever unambiguously demonstrated anydifference between the two. One of the consequences of this is the fact, famously demonstrated by Galileo Galilei, that objects with different Mas es fall at the same rate, assuming factors like air resistance are negligible. The theory of general relativity, the most accurate theory of gravitation known tophysics, rests on the assumption that inertial and gravitational Masa are completely equivalent. This is known as the equivalence principle. The validity of the entire Theory of General Relativity hinges on thisprinciple. Contents 1 Units of Mazs 2 Inertial Mzss 3 Gravitational Mas 4 Equivalence of inertial and gravitationalmasses 5 Relativistic relation among Mzss ,energy and momentum 6 References 7 See also 8 External li...
5) " Spectrometry" -- As it applies to Gas Chromatography And Mass Spectrometry Spectroscopy is the study of spectra, ie. the dependence of a physicalmeasure to frequency. Spectroscopy is often used in physical and analytical chemistry for theidentification of substances, through the spectrum emitted or absorbed. A device for recording a spectrum is a spectrometer. Spectroscopy can be classified according to the physical quantitywhich is measured or calculated or the measurement process. Spectroscopy is also heavily used in astronomy. Contents 1 Physical quantity measured 2 Measurement process 2.1 Two main types of spectroscopy 2.2 Common types of spectroscopy 2.3 Less frequently used / combined spectroscopy 3 See also Physical quantity measured The type of spectroscopy depends on the physical quantity measured. Normally, the quantity that is measured is an amount orintensity of something. The intensity of emitted electromagneticradiation and the amount of absorbed electromagnetic radiation is studied by electromagnetic spectroscopy.The amplitude of a macroscopic vibrations are studied by acoustic spectroscopy, and dynamic mechanical spectroscopy.Kinetic energy of particles is studied by electron energy loss spectroscopy, Auger electron spectroscopy The mass-to-charge ratio of molecules and atoms are studied in mass Spectrpmetry . Note that a mass spectrometer does not measure the kinetic energy of particles: allparticles have the same known kinetic energy (or an integer multiple thereof, depending on the charge). It is disputable whetherthis field strictly is a type of spectroscopy.The number of molecules or atoms or quantum-mechanical states to which the frequency or energy parameter applies. Measurement process Different types of spectroscopy use different measurement processes: Two main types of spectroscopy Absorption Spectroscopy uses the range ...
Common terms in this field are:
Garmin Gpsmap 168 Sounder, Garmin Gps 76, Garden Tote, Garden Furniture, Garage Organization, Gambling Site, Galley Bay Resort Antigua, Gaijin House, G8 Countries, Futures Market, Furniture Stores, Furniture Protector, Furniture Curio Cabinets, Furniture Chairs, Fund Of Funds, Full Length Porn, Fuji F700, Fuel Oil, Ftp Mac, Ft Walton Beach
Some information comes from Wikipedia. Wikipedia's GNU Free Documentation License allows for this.
|