A rumor Wikipedia:
Fruits generally contain fructose. Fructose sweet sweet and refreshing nature of having a cold, that the lower the temperature, the greater the sweetness, so you may feel will be sweeter after iced. Further tongue sensitivity to sugars also by the temperature change.
Demonstration:
In the case of the same sugar content, sweet taste due to temperature changes. Alberto Cruz and Barry G. Green of Yale University was in February 2000 in "Nature" published an article, entitled "Thermal Stimulation of Taste" article. Experiments proved that we humans and other mammals sweet tongue sensitivity to temperature changes. They believe that the temperature of the surface of the tongue would bring "excitement" to change our sense of taste. They use instruments to measure the taste nerves on the tongue of the reaction.
First, the temperature of the tongue will react differently in different positions (for example, there are some more sensitive location, position and some are not).
Nerve fibers can sweet, salty, bitter and sour and reaction. These nerve fibers also have the same reaction temperature (of course, include pain and pressure). Previous studies have demonstrated a lot of different taste nerves can have different variations of the temperature, but this study the first direct evidence of this phenomenon. Taste and thermal stimulation, two different feelings, brings the same "feel."
In addition, fruits generally contain fructose. Fructose sweet sweet and refreshing nature of having a cold, that the lower the temperature, the greater the sweetness, so you may feel will be sweeter after iced.
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