Login

Join for Free!
112417 members


help please

Debate and discussion of any biological questions not pertaining to a particular topic.

Moderator: BioTeam

help please

Postby carlito-cool55 » Fri Feb 09, 2007 9:25 pm

a student heats up a test tube containing large amount of protien and biuret reagent. She notices a colour change from violet to blue. Explain why heating causes a colour change.
carlito-cool55
Garter
Garter
 
Posts: 2
Joined: Fri Feb 09, 2007 9:22 pm

Postby Locus » Fri Feb 09, 2007 11:54 pm

Becouse there is chemical reaction at the hight temperuture, and reagent bind to protein, that give new color (by the way - chang from violet to blue is a slight color change, becose those colorse is close to one another at the spectrum)
Evolution will arrange everything
User avatar
Locus
Coral
Coral
 
Posts: 157
Joined: Sun Dec 03, 2006 8:03 pm
Location: Israel, Haifa

Carlotio_cool55

Postby bio_nerd101 » Thu Feb 22, 2007 3:13 pm

i think first you should stop calling your self cool and just stick to your name....second.....the color changed becuase of what she mxed...duh...
bio_nerd101
Garter
Garter
 
Posts: 12
Joined: Thu Feb 15, 2007 3:27 pm


Postby MrMistery » Thu Feb 22, 2007 3:23 pm

Everyone is entitled to their own nickname as long as it respects the forum rules. And really now, ghandi once said "Only speak if you can improve on the silence"
"As a biologist, I firmly believe that when you're dead, you're dead. Except for what you live behind in history. That's the only afterlife" - J. Craig Venter
User avatar
MrMistery
Inland Taipan
Inland Taipan
 
Posts: 6832
Joined: Thu Mar 03, 2005 10:18 pm
Location: Romania(small and unimportant country)

Re: Carlotio_cool55

Postby Dr.Stein » Fri Feb 23, 2007 4:07 am

bio_nerd101 wrote:i think first you should stop calling your self cool and just stick to your name....second.....the color changed becuase of what she mxed...duh...

This is harsh! :(
Image
User avatar
Dr.Stein
King Cobra
King Cobra
 
Posts: 3501
Joined: Thu Jul 07, 2005 7:58 am
Location: 55284 Yogyakarta, Indonesia

hmmm......

Postby bio_nerd101 » Fri Feb 23, 2007 3:28 pm

okay....i know you guys are saying that to me but come on.....sorry!
bio_nerd101
Garter
Garter
 
Posts: 12
Joined: Thu Feb 15, 2007 3:27 pm

Postby Darby » Sat Feb 24, 2007 3:37 pm

I use biuret regularly and never use heat to facilitate the reaction - is that weird?
Darby
Viper
Viper
 
Posts: 1262
Joined: Thu Mar 02, 2006 5:29 pm
Location: New York, USA


Return to General Discussion

Who is online

Users browsing this forum: No registered users and 7 guests

cron