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Explore various chemical tests like Benedict’s test for sugars, Biuret’s test for proteins, Iodine test for starch, and Sudan test for lipids to analyze food composition. Understand color indications and results.
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What’s in your food? http://www.il.mahidol.ac.th/course/respiration/Lesson3_menu.html
BENEDICT’S TEST for SIMPLE SUGARSColor varies from a green to brick-red precipitate depending on the amount and kind of sugar present. http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Laboratory/Chemical%20Composition%20of%2 0Cells/Chemical%20Composition%20of%20Cells.htm
BIURET’S TEST for PROTEINS Color Indication Blue No protein or peptides Violet Protein (complete product; one or more chains) Pink Peptides (two or more amino acids) http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Laboratory/Chemical%20Composition%20of%20Cells/ Chemical%20Composition%20of%20Cells.htm
IODINE TEST for STARCH Iodine turns BLUE-BLACK in the presenceof starch. http://faculty.ntcc.edu/mhearron/cell_chemistry.htm
SUDAN TEST(Lipids) POSITIVE SUDAN TEST http://biology.unm.edu/ccouncil/Biology_124/Summaries/Macromol.html
PAPER BAG TEST for LIPIDS http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Laboratory/Chemical%20Composition%20of%2 0Cells/Chemical%20Composition%20of%20Cells.htm