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Unformatted text preview: in Meat Quality Factors for Meats Hemoglobin and myoglobin oxidize with time Anthocyanins in Fruits and Flowers Anthocyanin Chemistry
OH + HO O O
OH OH + HO O A OH B C
OH OH OH Carotenoids Alpha-Carotene Beta-Carotene Red, yellow, orange pigments Important for ocular health Many are pro-vitamin A Mango Carotenoids Which would you rather eat? Carrot Colors
bred carrots with
pigments that reflect
almost all colors of
the rainbow. More
they're very good
for your health.
Photo by Stephen
Ausmus. USDA-ARS Structure of Chlorophyll Green pigment in stems and
leaves of plants Bright green in nature In the presence of heat or
acid, chlorophyll is degraded
to pheophytin Dull green colors of canned
vegetables is indicative of Food Color Synthetic or Certified Widely used, some controversy with consumers Each batch certified by FDA 9 synthetic colors are actually certified The FDA has approved 9 synthetic dyes for use in foods and 7
are used in food manufacturing: blue #1, blue #2, green #3, red #3, red #40, yellow #5 and
yellow #6. Another class of certified colors: FD&C lakes. Lakes are aluminum or calcium salts of each certified color Lakes of all of the FD&C dyes except Red #3 are legal Natural, NonCertified, or Exempt Colors Consist of ~26 colorants made up of pigments or other
substances capable of coloring a food that are obtained
from various plant, animal or mineral sources Must be proven safe and meet FDA approval Caramel (brown) Annatto extract (red/yellow) Beet powder (red) ß-carotene (yellow) Cochineal extract (red; carmine) Grape skins (red/purple) Ferrous gluconate (black) FYI Carminic acid is derived from the shells of an
insect and produces a magenta red color
(cochineal extract). The Carmine Cochineal feeds on certain
cactus species in central and south America.
Yummy Bug Juice Constituents of Foods
Oxidants and Antioxidants
The Bad Guys Oxygen is a strong oxidant Oxidation of foods is usually bad Destruction of flavor and color Off-...
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This document was uploaded on 02/01/2014.
- Spring '14