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The NYC (New York City) medium or GC (Neisseria gonorrhoeae) medium agar is a type of selective media used for isolating Gonococci and N. meningitidis. [ 1 ] The growth of Neisseria gonorrhoeae colonies on New York City medium agar
Gas chromatography (GC) is a common type of chromatography used in analytical chemistry for separating and analyzing compounds that can be vaporized without decomposition. Typical uses of GC include testing the purity of a particular substance, or separating the different components of a mixture. [ 1 ]
Unresolved complex mixture (UCM), or hump, is a feature frequently observed in gas chromatographic (GC) data of crude oils and extracts from organisms exposed to oil. [1] The reason for the UCM hump appearance is that GC cannot resolve and identify a significant part of the hydrocarbons in crude oils. The resolved components appear as peaks ...
Gas chromatography–mass spectrometry (GC–MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. [1] Applications of GC–MS include drug detection, fire investigation, environmental analysis, explosives investigation, food and flavor analysis ...
Nucleotide bonds showing AT and GC pairs. Arrows point to the hydrogen bonds.. In molecular biology and genetics, GC-content (or guanine-cytosine content) is the percentage of nitrogenous bases in a DNA or RNA molecule that are either guanine (G) or cytosine (C). [1]
A chromatography detector is a device that detects and quantifies separated compounds as they elute from the chromatographic column.These detectors are integral to various chromatographic techniques, such as gas chromatography, [1] liquid chromatography, and high-performance liquid chromatography, [2] and supercritical fluid chromatography [3] among others.
The EPA also based its instruction manuals and standards for environmental testing on the Finnigan GC/MS, publishing the results in the Federal Register in 1979. [16] [2] By 1984, all public water was to be tested by using a GC/MS apparatus. [17] In the 1980s, an estimated 60-70% of Finnigan's GC/MS sales went to the environmental market. [5]
The silver concentration in the test sample is the x-intercept of the plot. The dilution factor is multiplied by this initial concentration to determine the original concentration. Matrix effects occur even with methods such as plasma spectrometry , which have a reputation for being relatively free from interferences.