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In NMR spectroscopy, e.g. of the nuclei 1 H, 13 C and 29 Si, frequencies depend on the magnetic field, which is not the same across all experiments. Therefore, frequencies are reported as relative differences to tetramethylsilane (TMS), an internal standard that George Tiers proposed in 1958 and that the International Union of Pure and Applied Chemistry has since endorsed.
In the pharmaceutical industry, drug dissolution testing is routinely used to provide critical in vitro drug release information for both quality control purposes, i.e., to assess batch-to-batch consistency of solid oral dosage forms such as tablets, and drug development, i.e., to predict in vivo drug release profiles. [1]
The Companies Act 2013 (No. 18 of 2013) is an Act of the Parliament of India which forms the primary source of Indian company law. It received presidential assent on 29 August 2013, and largely superseded the Companies Act 1956. The Act was brought into force in stages.
One of the most widely used methods for headspace analysis is described by the United States Environmental Protection Agency (USEPA). Originally developed by the R.S. Kerr USEPA Laboratory in Ada, Oklahoma as a "high quality, defendable, and documented way to measure" methane, ethane, and ethene, [7] [8] RSKSOP-175 is a standard operating procedure (SOP) and an unofficial method employed by ...
The introduction of the Companies Act 2013 (2013 Act), which replaced the previous Companies Act 1956, was one of the most important legal reforms in recent years (1956 Act). Though the 2013 Act was a start in the right way by introducing important improvements in areas like disclosures, investor protection, corporate governance, and so on ...
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 ]
The article The 12 Companies of Christmas originally appeared on Fool.com. Fool contributor Jessica Alling has no position in any stocks mentioned. The Motley Fool recommends and owns shares of ...
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]