Natural Pigment: Chlorophyll, green color (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
Research chefs are the best scientists
The kitchen is a place of science. As with any scientific experiment, the results of the cooking process must be analyzed to understand how the methods influence the end results. Understanding the unique chemical structures of foods, and underlying scientific principles in each step of the preparation process and their effects on the resultant dish enables our chefs to perfect existing recipes and innovate in the kitchen.
Research Chefs are the Best Scientists (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
This understanding of the scientific process is what makes Yeditepe University a global leader in both traditional and modern Turkish cuisine: Yeditepe University is home to the only Department of Gastronomy and Culinary Arts to hold a PATENT for food product development.
Kitchen as a R&D Laboratory (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
Innovating the Turkish cuisine
Food engineer Sibel Ozilgen is Head of the Gastronomy and Culinary Arts Department of Yeditepe University. She is the author of the first International Culinary Science textbook written by a Turkish academician. Her expertise is focused on food and science. A key component in Prof. Dr. Sibel Ozilgen's course 'Foods and Their Specifications' is exploring the common pigments in foods.
Vegetables of Greengrocers (2021) by Yudum Tuğçe ErkliOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
4 experiments with natural pigments
Natural pigments give fruits and vegetables their vibrant colours. They grab the attention of the consumers and may lead to a good first impression of a product. Each pigment has its own chemical structure and also health benefits. Here are four experiments to inspire you to start experimenting with food.
Colorful Plates: Natural Food Pigments Colorful Plates: Natural Food Pigments (2020)Original Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
#1: Anthocyanins
Anthocyanins are the main pigments found in red fruits and vegetables, such as strawberries, cherries, beets, red grapes, apples, and tomatoes (called lycopene in tomatoes).
Colorful Plates: Natural Food Pigments Natural Pigment 2: Anthocyanins, blue/purple color (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
Blue/purple fruits and vegetables such as prunes, purple cabbage, blackberries, and eggplant also get their colors from anthocyanin pigments.
Anthocyanins are very sensitive to acidity of the medium. At high acidic medium (i.e., with lemon addition), they are mostly red to pink, at low acidic medium are blue to purple.
Colorful Plates: Natural Food Pigments Natural Pigment 3: Carotenoids, orange and yellow color (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
#2: Carotenoids
Carotenoids are the main pigments found in orange and yellow fruits and vegetables such as carrots, oranges, bell peppers, and pumpkin.
Carotenoids are oil soluble and less sensitive to heat processes compared to the other pigments. Beta-carotene is a precursor of vitamin A.
Natural Pigment: Chlorophyll, green color (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
#3: Chlorophyll
Chlorophyll is the main pigments found in green fruits and vegetables such as spinach, kale, celery, green bell pepper, and broccoli.
Chlorophyll is highly sensitive to heat, enzymes, and acidity. High acid destroys the color, bases preserve the color but destroys the texture. Reducing heat and/or heating time will decrease the effect of heat on this pigment.
Colorful Plates: Natural Food Pigments Natural Pigment 4: Carotenoids, concentration effect (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
Bell peppers differ in content of carotenoids and other pigments. Red ones are the richest in carotenoids, and green ones richest in chlorophyll.
Colorful Plates: Natural Food Pigments Natural Pigment 6: Anthoxanthins, white color (2020) by Prof. Dr. Sibel OzilgenOriginal Source: Faculty of Fine Arts, Gastronomy and Culinary Arts Department
#4: Anthoxanthins
Anthoxanthins are the main pigments found in white colored fruits and vegetables such as onions, garlic, leeks, cauliflower. Reducing heat and/or heating time will decrease the effect of heat on this pigment.
Long heat treatment causes yellowing. Prof Ozilgen suggests that reducing heat and/or heating time will decrease the effect of heat on this pigment.
Gıda Bilmeceleri. Ozilgen S. Yeditepe University Publishing Company , 2017, Türkiye, Istanbul