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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 ]
PTT Global Chemical (Thai: บริษัท พีทีที โกลบอล เคมิคอล จำกัด (มหาชน)), also known as PTTGC, is a petrochemical company that specializes in synthesizing olefins and aromatics.
Gas chromatography-mass spectrometry (GC-MS) is a two-dimensional chromatography technique that combines the separation technique of gas chromatography with the identification technique of mass spectrometry. GC-MS is the single most important analytical tool for the analysis of volatile and semi-volatile organic compounds in complex mixtures. [7]
The GC B cells that differentiate into plasma cells are B cells that show high affinity for the antigen. [ 3 ] [ 6 ] When GC B cells receive help from T follicular helper cells, there is an interaction between CD40 (expressed on the B cell) and CD40L (expressed on the T follicular helper cell), which increases the activation of NF-kB in the B cell.
GC–MS is used for the analysis of unknown organic compound mixtures. One critical use of this technology is the use of GC–MS to determine the composition of bio-oils processed from raw biomass. [29] GC–MS is also utilized in the identification of continuous phase component in a smart material, magnetorheological (MR) fluid. [30]
Gas chromatography-olfactometry (GC-O) is a technique that integrates the separation of volatile compounds using a gas chromatograph with the detection of odour using an olfactometer (human assessor). [1] It was first invented and applied in 1964 by Fuller and co-workers. [2]
GC content is found to be variable with different organisms, the process of which is envisaged to be contributed to by variation in selection, mutational bias, and biased recombination-associated DNA repair. [19] The average GC-content in human genomes ranges from 35% to 60% across 100-Kb fragments, with a mean of 41%. [20]
Silica gel particles are commonly used as a stationary phase in high-performance liquid chromatography (HPLC) for several reasons, [13] [14] including: High surface area: Silica gel particles have a high surface area, allowing direct interactions with solutes or after bonding of variety of ligands for versatile interactions with the sample molecules, leading to better separations.