In healthy adults, the half-life of caffeine is 4.9 hours. In pregnant women, the half- life is 9-11 hours. In infants as well as young kids, the half-life of caffeine is longer than the adults, about 30 hours. Patients with severe liver disease, caffeine may accumulate in the liver with the half-life up to about 96 hours.
Much of North Koreaâs aviation fuel appears to come from China. In 2015, the isolated country spent $877,048 importing 1,415 tonnes of Chinese jet fuel, according to Chinese customs data - enough for North Korea to operate its fleet of largely Soviet-era military aircraft.
Thursday 8 October 2015 02.06 EDT Last modified on Friday 11 November 2016 07.41 EST. The US government believes North Korea has the capability to launch a nuclear weapon against the homeland and stands ready to defend against any such attacks, a high-level US military official has said.