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Green Tea Extract
Thea-flan
Green
tea extract "Thea-flan" is manufactured in a highly safe way preserving
its value for
use in food materials, food additives, and highly functional foods.
"Thea-Flan" contains bio-active polyphenolic compounds such as Catechin
at very high concentration.
Function
Anti-Oxidation
Deodorization
Anti-Microbacterial activity
Catechin family contained in tea are types
of polyphenolic compounds more commonly known as tannin. They are
known to have various chemical, bio-chemical, and medicinal values.
What is Catechin?
Ancient writings mention that tannin was
used to tan leather. In 1796, Seguin found in oak gall, used as
tanned hide material at the time, that tannin is the leather component.
In the 1900's the study of tannin intensified and in 1913 Deuss
separated tannin from tea and called it white tannin. Scientists
confirmed that the tannic constituent found in tea is condensed
tannin and the constructional unit of this tannin is the catechin
family.
The characteristic of tannin is the combination with protein and
metal ion. From the basic study for its uses in natural food additives
and biological active substances, the study of one use of tannin
has moved on to more applied research.
Fig. 1 Chemical structure and types of catechin
(-) Epicatechin R1=H R2=OH
(-) Epigallocatechin RI=OH R2=OH
(-) Epicatechingallate R1=H R2=galloyl
(-) Epigallocatechingallate R1=OH R2=galloyl
Characteristics of Catechin
Table 1 shows the characteristics of catechin.
Catechin has high solubility in water and alcohol, and holds wide
utility toward water-type foods. Also, the general characteristics
are listed below.
1. Reaction to metal (Ca - settles, Fe - blue to black color)
2. Reaction to protein (settles, etc.)
3. Prevention of food oxidation
4. Astringency
5. Anti-microbacterial activity (cavity periodontal bacteria,
food poison bacteria)
6. Various medical activity (lowering cholesterol, anti-allergy,
etc.)
7. Deodorization (fish odor, oral odor, etc.)
| Table
1 Characteristics of Catechin |
| |
EC
|
EGC
|
Ecg
|
EGCg |
| Molecular
Formula |
C15H14O6 |
C15H14O7 |
C22H18O10 |
C22H18O11 |
| Molecular
Weight |
290 |
306
|
442 |
458 |
| Melting
Point |
242
|
217 |
264
|
233 |
| Amax
(nm) |
278 |
269
|
276 |
273 |
| Gelatine
Reaction |
Unsettles |
Unsettles |
White
sediment |
White
sediment |
Second
Steel Reaction
|
Green
|
Violet
|
Indigo |
Indigo |
| Solubility: |
| Water
|
Hard
to dissolve |
Dissolve |
Easily
dissolves |
Easily
dissolves |
| Hot
Water |
Dissolve |
Easily
dissolves |
Very easily dissolves |
Very
easily dissolves |
| Alcohol
|
Easily
dissolves |
Easily
dissolves |
Very
easily dissolves |
Very
easily dissolves |
| Acetone
|
Easily dissolves |
Easily
dissolves |
Very
easily dissolves |
Very
easily dissolves |
| Ethylacetate
|
Dissolves
|
Easily
dissolves |
Easily
dissolves |
Easily
dissolves |
| Ether
|
Hard
to dissolve |
Hard
to dissolve |
Easily
dissolves |
Easily
dissolves |
| Benzene
|
Does
not dissolve |
Does
not dissolve |
Does
not dissolve |
Does
not dissolve |
| Choroform
|
Does
not dissolve |
Does
not dissolve |
Does
not dissolve |
Does
not dissolve |
| Taste |
Bitter, then sweet aftertaste |
Bitter,
then sweet aftertaste |
Strong astringent |
Strong
astringent |
|
| Uses
of thea-flan |
| Field
|
Uses
|
Dosages |
Prevention
of Food Oxidation
|
General
oil (vegetable oil, soybean oil, palm oil, lard, etc.)
|
0.01-0.5%
|
0.002-0.2% |
| Oil-containing
food (snacks, fried food, margarine, etc.) |
| Oil
that contains polysaturated fatty acid |
0.1-1.0%
|
0.2-0.3% |
Extension
of durable date of seafood products.
|
0.01-0.5% |
|
| Meat,
fish meat, ground meat (ham, sausage, salami, etc.)
|
| Dry
food such as fish flour |
0.01-0.1%
|
| Prevent
fading of natural pigment |
0.01-0.5% |
0.05-0.3% |
|
Controls Germs |
Generally
all kinds of food |
0.1-0.5%
|
0.05-0.3% |
| Textile
goods, non-woven fabrics |
1-5%
|
|
| Deodorization
|
Pet
goods (pet food, spray, pet litter, etc.) |
0.1-1.0%
|
0.03-0.3% |
| Food
to prevent halitosis (candy, gum) |
0.01-0.5% |
0.002-0.2% |
| Textile
goods, non-woven fabrics |
1-5% |
|
| Health
Food |
Tablets |
|
10-50% |
| Health
drink |
|
0.1-0.3% |
| Prevention
of tooth decay, gingivitis (candy, biscuit, etc.)
|
|
| Inhibition
of cholesterol (hamburger, ham, sausage, fried food,
frozen food, etc.) |
0.1-2.0% |
| Prevention
of influenza (candy, etc.) |
|
In addition, Thea-Flan 30 is licensed for
use in blending components of cosmetics in accordance with the
Japanese Cosmetic Condex in the following usage: soap, cleansing
water, shampoo, rinse, hairdye, hair toiletry, general cream,
latex, shaving cream, toiletry, eau de cologne, shaving lotion,
sun-screening lotion, toiletry oil, anti-sunburn oil, face powder,
foundation perfume, toiletry pack, nail cream / enamel-elimination
liquid, aphrodisiacs, rouge, bath toiletry, eye shadow / mascara
and eye cream.
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