Abd Al-hafid

Appointed caliph of Marrakech by Abd al-Aziz, Abd al-Hafid had no difficulty there in rousing the Muslim community against his brother's Western ways. With Marrakech his, Abd al-Hafid routed his brother's forces and pensioned off the sultan.

Uhlenbeck, George Eugene

In 1925, while working on his Ph.D. at the University of Leiden, Neth. (1927), he and Goudsmit put forth their idea of electron spin after ascertaining that electrons rotate about an axis. Uhlenbeck joined the physics department at the

Baruch, Bernard

After graduating from the College of the City of New York in 1889, Baruch worked as an office boy in a linen business and later in Wall Street brokerage houses. Over the years he amassed a fortune as a stock market speculator. In 1916 he was appointed by President Woodrow Wilson to the Advisory

Iridosmine

Also called  Osmiridium,   mineral consisting of an alloy of iridium and a smaller proportion of osmium. It occurs in gold-bearing conglomerates, as at the Witwatersrand in South Africa, and in gold sands, as in California and Oregon, U.S. Because of their hardness and resistance to corrosion, both natural and synthetic iridosmine are used for tips of pen nibs, surgical needles, and sparking points

Shostakovich, Dmitry

In full  Dmitry Dmitriyevich Shostakovich  Russian composer, renowned particularly for his 15 symphonies, numerous chamber works, and concerti, many of them written under the pressures of government-imposed standards of Soviet art.

Cytokinin

Any of a number of plant growth substances that are usually derived from adenine. Synthesized in roots, cytokinins move upward in the xylem (woody tissue) and pass into the leaves and fruits, where they are required for normal growth, for cell differentiation, and, in conjunction with auxin (another plant hormone), to promote cell division.

Pacific Islands

Humans in the Pacific have had to adapt to island environments just as other species have done. The technologies and organizational systems introduced into the Pacific by migrants were established in habitats that varied from receptive to hostile. The earliest arrivals, as food-gathering peoples, probably provoked little disruption of the environment. Their