Even more unappealing are the changes to the way interest paid on Series EE bonds is calculated. For bonds purchased starting on May 1, 2005, the variable rate was eliminated and interest changed to a fixed flat rate for the life of the bond -- or for the first 20 years of a 30 year bond.
Oolong tea is a traditional Chinese tea. Itâs made from the leaves of the Camellia sinensis plant, the same plant used to make green tea and black tea. The difference is in how the tea is processed. All tea leaves contain certain enzymes, which produce a chemical reaction called oxidation. Oxidation is what turns the green tea leaves into a deep black color.
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.