All Science Fair Projects  

Science Project Forum

Welcome to the Mad Scientist's Forum! Join thousands of other students who've received help from the Mad Scientist and our science Mentors!
Register first, then post your questions below. Registration takes only 1 minute! Meet the Mad Scientist
Lost your
Go Back   All Science Fair Projects > Get Help for Your Grade 9-12 Science Fair Projects > Food Science (Grades 9-12)
User Name

Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 01-12-2006, 02:08 PM
dreamerofeternity's Avatar
dreamerofeternity dreamerofeternity is offline
Senior Mentor (Leader, Team A)
Join Date: Oct 2005
Location: New York, NEW YORK!!!
Posts: 435
Rep Power: 24
dreamerofeternity would have made Einstein proud! dreamerofeternity would have made Einstein proud!
Default Quantitative Analysis of Proteins in Milk Spoilage

As milk spoils, I tested the amount of proteins in milk by 1)centrifuging, then 2)diluting 3)adding biuret solution 4)put in spectrophotometer at 650 nanometers. The experiment is already finished. I've found that during the spoilage, there was an initial slight increase in the amount of whey proteins before it decreases. I wonder why. I understand why it decreases--casein precipitates/coagulates as the pH changes and microorganisms might have broke down the proteins into polypetitides (if protein-consuming microorganisms are present at the initial stages of spoilage). Another question is did the decrease in pH (more acidic) cause the proteins to break down into polypetitides, or is it only the microorganisms?

Thank you very much!
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
science project milk and water help shawn81 Simple Projects (Grades K-5) 0 11-10-2008 05:19 PM
science project milk and water help shawn81 Simple Projects (Grades K-5) 0 11-10-2008 05:04 PM
Proteins during Milk SPoilage dreamerofeternity Displaying your Science Project 0 01-21-2006 10:06 AM
what is the effect of heat and acid on mlik proteins? Harmony Get Ideas for Your Project 1 10-24-2005 02:59 PM

All times are GMT -8. The time now is 11:33 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright (C) 2006 All Science Fair All Rights Reserved