August 13, 2007. 1  How to Determine Maturity of U.S. Savings Bonds. 2  Check to see what type of U.S. savings bond you have, in order to determine whether it has stopped earning interest. 3  Discover the time your bond reaches maturity, and when it stops earning interest, as these times can be divergent. For example, many bonds mature in 17 years, but may continue to accrue interest for 30 years or more.
Oolong tea is a product made from the leaves, buds, and stems of the Camellia sinensis plant. This is the same plant that is also used to make black tea and green tea. The difference is in the processing. Oolong tea is partially fermented, black tea is fully fermented, and green tea is unfermented. Oolong tea is used to sharpen thinking skills and improve mental alertness. It is also used to prevent cancer, tooth decay, osteoporosis, and heart disease.
In this article. Oolong tea is made from leaves of the same plant that green and black teas come from. The difference lies in how long the leaves ferment. Green tea leaves are unfermented, while leaves for black tea are fully fermented.Oolong comes from leaves that are partially fermented.Fermentation, or its lack, gives teas their color and aroma. It also alters tea's chemical makeup. The most notable changes happen in a group of chemicals called catechins.reen tea leaves are unfermented, while leaves for black tea are fully fermented. Oolong comes from leaves that are partially fermented. Fermentation, or its lack, gives teas their color and aroma. It also alters tea's chemical makeup. The most notable changes happen in a group of chemicals called catechins.