help please

last updated by

Darby 17 years, 10 months ago

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- February 9, 2007 at 9:25 pm #6935
  carlito-cool55
  Participant
  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.
- February 9, 2007 at 11:54 pm #68814
  Locus
  Participant
  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)
- February 22, 2007 at 3:13 pm #69309
  bio_nerd101
  Participant
  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…
- February 22, 2007 at 3:23 pm #69313
  MrMistery
  Participant
  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"
- February 23, 2007 at 4:07 am #69351
  Dr.Stein
  Participant
  quote bio_nerd101:
  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! 🙁
- February 23, 2007 at 3:28 pm #69379
  bio_nerd101
  Participant
  okay….i know you guys are saying that to me but come on…..sorry!
- February 24, 2007 at 3:37 pm #69418
  Darby
  Participant
  I use biuret regularly and never use heat to facilitate the reaction – is that weird?
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