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What is the green colour around the yolk when you cook an egg too long ?

·Å´ó×ÖÌåËõС×ÖÌå·¢²¼ÈÕÆÚ£º2007-08-02 ä¯ÀÀ´ÎÊý£º 508
ºËÐÄÌáʾ£ºIf an egg is overcooked a greenish ring sometimes appears around egg yolk, this is the result of iron and sulphur compounds in the egg. It can also occur when there is much iron in the cooking water. The green ring affects neither taste nor nutrition
      If an egg is overcooked a greenish ring sometimes appears around egg yolk, this is the result of iron and sulphur compounds in the egg. It can also occur when there is much iron in the cooking water. The green ring affects neither taste nor nutrition.
      ¸ü¶à·­ÒëÏêϸÐÅÏ¢Çëµã»÷£º http://www.trans1.cn
      ¹Ø¼ü´Ê£º the is ring egg in iron much cooking occur also when
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