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General Cooking (rec.food.cooking) For general food and cooking discussion. Foods of all kinds, food procurement, cooking methods and techniques, eating, etc. |
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Questions of life-roast beef
What exactly is that green iridescent sheen on slices of roast beef?
I've seen it a million times at the work cafeteria and I dont buy their beef anymore because it is repugnant to me, though apparently considered edible. This wkend it was on the slices of roast beef bought at our "premium" grocery store meat counter. |
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Questions of life-roast beef
On Jul 22, 7:52*pm, (z z) wrote:
> What exactly is that green iridescent sheen on slices of roast beef? > I've seen it a million times at the work cafeteria and I dont buy their > beef anymore because it is repugnant to me, though apparently considered > edible. This wkend it was on the slices of roast beef bought at our > "premium" grocery store meat counter. Your tax dollars at work: 9. What causes iridescent colors on meats? 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. |
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Questions of life-roast beef
"z z" > wrote in message ... > What exactly is that green iridescent sheen on slices of roast beef? > I've seen it a million times at the work cafeteria and I dont buy their > beef anymore because it is repugnant to me, though apparently considered > edible. This wkend it was on the slices of roast beef bought at our > "premium" grocery store meat counter. Good question. I have seen it on very expensive organic beef but didn't know what it was. |
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Questions of life-roast beef
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Questions of life-roast beef
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Questions of life-roast beef
On 7/22/2012 8:52 PM, z z wrote:
> What exactly is that green iridescent sheen on slices of roast beef? > I've seen it a million times at the work cafeteria and I dont buy their > beef anymore because it is repugnant to me, though apparently considered > edible. This wkend it was on the slices of roast beef bought at our > "premium" grocery store meat counter. > A reply from Google/Yahoo from 2006: "It means nothing. Its totally normal and its called birefringence. Here's the deal. The cut surface of meat is pretty smooth. But, if you look closely, you'll see it's actually a vast landscape of parallel fibers. When cut, the reduced surface pressure coaxes microscopic beads of moisture to the surface, each one of which acts as an independent prism. When viewed in concert, they look like a rainbow." gloria p |
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