Grupo Salinas region and by 1987, 59 stores. Elektra Group became a publicly traded company listed on the Bolsa Mexicana de Valores, the Mexican Stock Exchange. In 1993, Grupo Elektra bought the Imevisión government television network and renamed it TV Azteca. TV Azteca created an initial public offering in 1997 on the Mexican and New York stock exchanges. In 2012, Grupo Elektra, a wholly owned subsidiary of Grupo Salinas, acquired Advance America for an estimated $780 million USD. In 2003, Grupo Salinas purchased the telecommunicaions company Iusacell and the mobile phone company Unefón. Iusacell was sold to AT&T in 2014, and rebranded
Dioscorea mexicana caudex, bear heart-shaped leaves. "Dioscorea mexicana" ranges from the state of San Luis Potosí in northeastern Mexico south to Panama. It is notable for its production of diosgenin, which is a precursor for the synthesis of hormones such as progesterone. Russell Marker developed the extraction and manufacture of hormones from "D. mexicana" at Syntex. Later the Mexican barbasco trade focused instead on "Dioscorea composita" instead, as this variety has a higher diosgenin content. Dioscorea mexicana Dioscorea mexicana, Mexican yam or cabeza de negro is a species of yam in the genus "Dioscorea". "Dioscorea mexicana" is a caudiciform dioscorea having either