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Tea - Coggle Diagram
Tea
What chemicals build up tea
flavors?
Polyphenol
Caffeine
Theaflavins (converted from polyphenol by oxidation)
Thearubigin (converted from polyphenol by oxidation)/(contribute for the strong flavor and dark color).
Amino acid (Theanine)
Sugar/ Carbohydrate (usually sucrose).
Types of
tea?
Black Tea (fully oxidized)
Green Tea (almost no oxidized)
Oolong tea (partially oxidized)
White Tea (light oxidized)
Yellow Tea (light oxidized)
Testing for "healthy" and "flavor"
Test for the concentration of polyphenol in tea.
Titrate the oxidants (polyphenols) in tea by potassium manganate
1/ Fill the burette with potassium permanganate
2/ Titrate until the solution (tea) changes its color.
$/ Measure the volume of titres, find the average titre, find the concentration of polyphenols base on the concentration of potassium permanganate and the formula Cm=n/v.
Independent variable
Duration of Brewing (min) - (3, 9, 15)
Dependent variable
Tannin volume in tea (mL)
Equipment:
4 x Nerada black tea bags
1 x Kettle
3 x 200ml beaker
1 x burette and 1 x set of the stand.
2 x 1 ml syringes
Postasium Permanganate 0.005 M solution.
Distilled water
1 x timer
Factors affect the chemical of tea
Time of boiling
Time start to process/heat the tea leaves after collect them. (Apply heat stop the oxidation process of tea).
The ingredients that is served with tea. Milk is discovered that it
reduces the antioxidants
capacity of tea.
What chemicals make a
healthy tea
?
Polyphenol/ flavonoids
Prevent oxidation damage of free radicals to cells.
Epigallocatechin-3 gallate (richest in green tea).
EGCG
reduces melanin secretion and production in melanoma cells and positively affects skin hydration, moisture retention, and wrinkle formation, in addition to radical
Theaflavins (richest in black tea).scavenging activity and reduction of melanin generation.
Fat-reducing
and glucose-lowering capabilities and lifestyle-related disease prevention related to anti-obesity, anticancer, anti-atherosclerotic, anti-inflammatory, antiviral, antibacterial, anti-osteoporotic, and anti-dental caries properties.