does anyone here know, what the chemical(s) or reaction that takes place, when prawns or lobsters etc... change colour from often blue grey to a redish pink when they`re heated?

it`s an irreversible reaction to my knowledge unlike most inorganic chems that often go back to their original colour on cooling.

 

this one`s been bugging me for some time now

It's caused by protein denaturation on cooking. There's a protein called crustacyanin (or something like that - can't remember off the top of my head) which binds a substrate that on it's own, is orange, but when it is bound to the protein turns blue-black. When the lobster is cooked, the protein denatures, forcing the substrate back into the orange form.

 

Since the protein doesn't renature on cooling, the substrate has to remain orange.

 

Cookie

Excellent, Thnx Cookie

should be colour by the way

d`pends on your country of teaching, I was taught in Canada, so I spell as colour

it`s a bit like Gray and Grey, both are valid

i really hate it when people argue which way to spell it. I wonder how the majority of the people here spell it...I''l make a poll right away!

don`t "Hate" anthing dude (not REALLY HATE). it shortens life span due to unwanted stress, Surfs up, ride it

What happens if you hate the thing that causes your stress?

Anyway, I never saw a lobster do that! I must lack experience! Off to Red Lobster!

YT2095 said in post # :

it`s a bit like Gray and Grey, both are valid

REALLY?! i always thought grey was correct, and gray is the steryotypcal grey, big headed, big eyed alien.... or is it the other way around. i never knew both were valid for the color (and probably the species too).

Of course they are both valid! But how'd you get gray as a big headed big eyed alien?

Cap'n Refsmmat said in post # :

What happens if you hate the thing that causes your stress?

stress makes you feel bad. your brain/body becomes bad when you feel bad.

I have experience in that field, unfortunately. Ever have to write 31 essays in 9 weeks?

Cap'n Refsmmat said in post # :

Of course they are both valid! But how'd you get gray as a big headed big eyed alien?

lol, i watch SciFi, and all of those alien discovery channel speciels. grey is now the name of those aliens (i'll have to check to see if it's grey or gray).

Cap'n Refsmmat said in post # :

I have experience in that field, unfortunately. Ever have to write 31 essays in 9 weeks?

ouch, no, but i have put off a lot of homework before...

I didn't put it off! I had two maniacal teachers, one with an essay a week, one with one every 2.5 days!

Are you an english major or something?

YT2095 said:

 

it shortens life span due to unwanted stress

 

Don't worry, I canr prove u wrong. Cause i would have been dead by now

 

Don't worry, i can also prove to u that ghosts exist!

fafalone said in post # :

Are you an english major or something?

 

obviously not. Art students are worked hard if they have to write one 2000 word essay per semester.