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The kraft process (also known as kraft pulping or sulfate process) is a process for conversion of wood into wood pulp, which consists of almost pure cellulose fibers, the main component of paper. The kraft process involves treatment of wood chips with a hot mixture of water, sodium hydroxide (NaOH), and sodium sulfide (Na 2 S), known as white ...

Kraft break. In astronomy, the Kraft break refers to the abrupt decrease in stars ' average rotation rates at surface temperatures of about 6200 kelvin. The so-called break was first noted by the astronomer Robert Kraft. The break is understood to separate stars with deep convective envelopes and efficient magnetic dynamos from those without.

The Kraft Circle was a student society of philosophers at the Institut für Österreichische Geschichtsforschung of the University of Vienna devoted to "considering philosophical problems in a nonmetaphysical manner and with special reference to the findings of the sciences". Its chairman and leading professor was Viktor Kraft, a former ...

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Apollo 14 →. Apollo 13 (April 11–17, 1970) was the seventh crewed mission in the Apollo space program and the third meant to land on the Moon. The craft was launched from Kennedy Space Center on April 11, 1970, but the lunar landing was aborted after an oxygen tank in the service module (SM) failed two days into the mission.

Aircraft hijacking incidents between the United States and Cuba were at their height between 1968 and 1972. These incidents have variously been attributed to terrorism, extortion, flight for political asylum, mental illness, and transportation between the two countries as a result of the ongoing antagonistic Cuba-United States relations and the Communist government restrictions against Cubans ...