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Sigma-Aldrich (formally MilliporeSigma) [5] [6] is an American chemical, life science, and biotechnology company owned by the multinational chemical conglomerate Merck Group Sigma-Aldrich was created in 1975 by the merger of Sigma Chemical Company and Aldrich Chemical Company.
Merck is a supplier to the life science industry. The Millipore Corporation was founded in 1954, and listed among the S&P 500 since the early 1990s, as an international biosciences company which makes micrometer pore-size filters and tests. In 2015, Merck acquired Sigma-Aldrich and merged it with Merck Millipore.
The life science business of Merck, formerly known as Merck Millipore, was created in July 2010 following the completed acquisition of the US company Millipore. It employs around 19,000 people in 66 countries and runs 65 manufacturing sites and uses the brands Sigma-Aldrich, Milli-Q and Millipore. [ 64 ]
Millipore may refer to: Millipore Corporation, a biosciences company acquired by Merck Group in 2010; MilliporeSigma, former name of Sigma-Aldrich; Merck Millipore, deprecated brand name used by Merck Group after Millipore acquisition
Chi Psi (ΧΨ) is a fraternity consisting of active chapters at 34 American colleges and universities. Chi Psi was founded in 1841 at Union College in Schenectady, New York . It was the first Greek-letter organization to be founded on the grounds of fraternal bonds, rather than the literary characteristics of the seven then-existing fraternities.
Sigma: 1855–1861, 1928 University of North Carolina at Chapel Hill: Chapel Hill, North Carolina: Active [d] Kappa: 1857–1873 College of the City of New York: New York City, New York: Inactive [1] Beta: 1858–1861, 1867–1875, 1883–1897, 1957 University of South Carolina: Columbia, South Carolina: Active [1] Gamma: 1858–1861, 1869 ...
Other well-known college fraternal organizations which use the skull and bones in some capacity in their public symbols include but are not limited to Delta Sigma Pi, Kappa Sigma, Sigma Phi Epsilon, Phi Kappa Sigma, Tau Kappa Epsilon, Chi Psi and Zeta Beta Tau Fraternities and Sigma Sigma Sigma, Chi Omega, and Kappa Delta Sororities. Other ...
The scaled inverse chi-squared distribution also has a particular use in Bayesian statistics. Specifically, the scaled inverse chi-squared distribution can be used as a conjugate prior for the variance parameter of a normal distribution. The same prior in alternative parametrization is given by the inverse-gamma distribution.