作者:公主愛撒嬌 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++於 2012-02-13 13:20 的補充留言 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
作者:Christine 美國政府農業部門,食品安全與檢驗服務的網頁是這樣說的(原文及網址如下):
時間:2012-02-13 07:04 |
不過有些金屬光澤是微生物繁殖,但這樣的情形發生時,光澤旁還會有些許黏液
牛肉不放血,所以含礦物質量比較高 所以提醒大家,選購食物和保存食物的方式也很重要喔!
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作者:Tea&Honey
時間:2012-02-13 09:00 "我買過現場宰殺的"活"鱸魚,魚塊上也都會有彩虹色反光耶=.=?"
我也是耶~ 所以可以安心食用對吧? |
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為什麼有些肉表面有彩虹般的顏色?
肉類含有鐵質、脂肪和其他化合物。光線照在肉上的時候,便分裂成像彩虹那樣的各種光芒。肉類的化合物裡也有幾種色素,在接觸到熱源或經過處裡的時候也可以產生彩虹色或綠色的光澤。把肉以真空包裝,放在光線接觸不到的地方,可以協助減輕這個狀況。然而彩虹色澤並不代表肉的品質或安全性有問題。
US Department of Agriculture, Food Safety and Inspection Service
Meat contains iron, fat, and other compounds. When light hits a slice of meat, it splits into colors like a rainbow. There are various pigments in meat compounds that can give it an iridescent or greenish cast when exposed to heat and processing. Wrapping the meat in airtight packages and storing it away from light will help prevent this situation. Iridescence does not represent decreased quality or safety of the meat.
http://www.fsis./Factsheets/Color_of_Meat_&_Poultry/index.asp
時間:2012-02-13 08:38
牛肉.鴨肉.和鵝肉都很常見~