Google Answers Logo
View Question
 
Q: Lipids, fat & waxes ( Answered 3 out of 5 stars,   0 Comments )
Question  
Subject: Lipids, fat & waxes
Category: Science > Chemistry
Asked by: marmite-ga
List Price: $10.00
Posted: 14 Jun 2003 16:30 PDT
Expires: 14 Jul 2003 16:30 PDT
Question ID: 217394
1.Hoew does the chain length ofd a fat or oil affect the solubility of
the fat or oil in polar & nonpolar solvents.
2. Margs are prepared by catalytic hydrogenation of some double bonds
of ther acacyl side chains. Discuss melting pt and rancidity
properties of margs & relate these to th changes that have occured to
the oils.
3. Resin manufacture - anme a resin used as a plasticiser, explain the
function & how does the fat/oil contribute to the manufacture of the
named plasticiser.
Answer  
Subject: Re: Lipids, fat & waxes
Answered By: synarchy-ga on 15 Jun 2003 12:49 PDT
Rated:3 out of 5 stars
 
Hello,

1) The chain length of a fat or oil affects its solubility.  The
shorter the chain, the more soluble in water and other polar solvents.
 The longer the chain, the more soluble it is in non-polar solvents.
http://216.239.39.100/search?q=cache:cIlid4_xsv4J:www.sh.lsuhsc.edu/new_curric/mod1_1/lipid%2520structure%2520I.ppt+chain+length+solubility+fat&hl=en&ie=UTF-8

2) Margarine is hydrogenated to increase it's melting point (more
saturated increases melting point - it allows tighter packing of the
fats, which makes them more stable, and thus gives them a higher
melting point):
http://www.bbc.co.uk/dna/h2g2/alabaster/A597071

and prevent rancid smells by removing the double bonds at which oxygen
can oxidize  the fats, contributing to the rancid smells:
http://www.indiaagronet.com/indiaagronet/Foods%20Technology/Fats%20and%20Oils.htm

Rancid smells increase with chain length (search for rancid in the
document):
http://chemed.chem.purdue.edu/genchem/topicreview/bp/2organic/carbonyl.html

3) Diethylene glycol is a resin plasticizer.  It's method of action is
to couple multiple groups through it's alcohol functional groups.  D
http://216.239.57.100/search?q=cache:zxhtIiXV92cJ:www.coe.ou.edu/cems/ulab/CHE4262/sec002/experiments/experiment1/Evaporator/UC-2054B%2520Diethylene%2520Glycol.pdf+%22resin+plasticizer%22++chemistry+fat&hl=en&ie=UTF-8

Another nice page on plasticizers and plastics:
http://216.239.39.100/search?q=cache:_jTuixtmRsMJ:www.velsicol.com/asps/documents/tech/basics1.doc+%22resin+plasticizer%22+function&hl=en&ie=UTF-8

A general page on plasticizers, resins and such:
http://www.woodfinishingsupplies.com/Lacquer%20by%20Design.htm

Please let me know if you have further questions.

synarchy

Search strategy:
"chain length" fat
margarine rancid
"resin plasticizer"
marmite-ga rated this answer:3 out of 5 stars

Comments  
There are no comments at this time.

Important Disclaimer: Answers and comments provided on Google Answers are general information, and are not intended to substitute for informed professional medical, psychiatric, psychological, tax, legal, investment, accounting, or other professional advice. Google does not endorse, and expressly disclaims liability for any product, manufacturer, distributor, service or service provider mentioned or any opinion expressed in answers or comments. Please read carefully the Google Answers Terms of Service.

If you feel that you have found inappropriate content, please let us know by emailing us at answers-support@google.com with the question ID listed above. Thank you.
Search Google Answers for
Google Answers  


Google Home - Answers FAQ - Terms of Service - Privacy Policy