Alfabeta Posted December 5, 2008 Report Share Posted December 5, 2008 Hello I want to do an exdended essay about whether food contains sis- or transfat. But yet I don't have any idea how to determine it. Could you please help me? Thank you for all answers Cheers Alfabeta Reply Link to post Share on other sites More sharing options...
ivy12003 Posted December 5, 2008 Report Share Posted December 5, 2008 [quote name='Alfabeta' post='29715' date='Dec 5 2008, 07:31 AM']Hello I want to do an exdended essay about whether food contains sis- or transfat. But yet I don't have any idea how to determine it. Could you please help me? Thank you for all answers Cheers Alfabeta[/quote] I would ask your EE advisor. They would have a good grasp as to what lab equipment is available, etc. Reply Link to post Share on other sites More sharing options...
Alfabeta Posted December 5, 2008 Author Report Share Posted December 5, 2008 I have been talking to my supervisor, and she said that I should investigate some on my own. Reply Link to post Share on other sites More sharing options...
Hedron123 Posted December 5, 2008 Report Share Posted December 5, 2008 (edited) Uhm.. well cis-fats are naturally ocurring while trans-fats are artificially made (generally by hydrogenation). In other words, trans-fats are more saturated than cis-fats. You could carry out a bromine test for unsaturation measuring the volume of Bromine that is used in each case. In the case of cis-fats, the red-brown colour of bromine will rapidly change to colourless as it is added to the chain (more volume of bromine will be required). On the contrary, trans-fats will require less volume (they might be fully saturated though) of Bromine. Fats that "accept" more bromine before it stops changng from red-brown to colourless are cis-fats. (Check this information with your tutor please!). Note: Trans-fats can occur naturally as in animal fats. Edited December 6, 2008 by Hedron123 Reply Link to post Share on other sites More sharing options...
Alfabeta Posted December 6, 2008 Author Report Share Posted December 6, 2008 [quote name='Hedron123' post='29761' date='Dec 6 2008, 12:03 AM']Uhm.. well cis-fats are naturally ocurring while trans-fats are artificially made (generally by hydrogenation). In other words, trans-fats are more saturated than cis-fats. You could carry out a bromine test for unsaturation measuring the volume of Bromine that is used in each case. In the case of cis-fats, the red-brown colour of bromine will rapidly change to colourless as it is added to the chain (more volume of bromine will be required). On the contrary, trans-fats will require less volume (they might be fully saturated though) of Bromine. Fats that "accept" more bromine before it stops changng from red-brown to colourless are cis-fats. (Check this information with your tutor please!). Note: Trans-fats can occur naturally as in animal fats.[/quote] Thank you so very much. What do you guys think of having this as an extended essay? Reply Link to post Share on other sites More sharing options...
Hedron123 Posted December 6, 2008 Report Share Posted December 6, 2008 I think it's good though you will have to confirm what I have told you with your teacher. However, you will have to think up of a RQ that is appropriate for the experiments you want to carry out. I can't think of any right now. Reply Link to post Share on other sites More sharing options...
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