To make white sugar, sulfur dioxide is added to cane juice before it gets evaporated. This gas does the bleaching of the juice so that it does not turn brown and produces white sugar. At later stages, phosphoric acid, calcium hydroxide or carbon dioxide is added to absorb impurities.
The first REM sleep period usually occurs about 70 to 90 minutes after we fall asleep. A complete sleep cycle takes 90 to 110 minutes on average. The first sleep cycles each night contain relatively short REM periods and long periods of deep sleep.
Iâm not alone. A 2013 Gallup poll found that Americans sleep an average of 6.8 hours a night, similar to numbers from the 1990s, but far less sleep than Americans got in 1974 when the Gallup poll found the average American sleeping 7.9 hours per night.