An overemphasis
on polyphenols, compounds that are significant
to color and astringency but less relevant
to teas such as shaded green tea production,
dominates the l i terature. Low
polyphenol content and high chlorophyll
content are important for producing an emerald-
green and smooth finished green tea
product that lacks astringency, and the brothy
character of the amino acids, and flowery
character of the aroma constituents, play a
much more significant role. In addition to
the nonpolyphenolic consti tuents, the
polyphenols of black tea are a poorly understood
but seemingly well-defined group of
compounds. The use of "thearubigen" in the
literature signifies a wide group of compounds
whose chemical identity has not been
traced to any identifiable chemical group. Its
use was most significant as a colorimetric
indicator for plantation production, but as a
chemical identifier its use has seemed to
hamper true identification of the mass balance
of black tea polyphenols. Work at identifying
these compounds in a systematic fasion has
begun, and it is hoped that future research
will deemphasize the term ' thearubigen' in
favor of more chemically accurate descriptors
An overemphasis
on polyphenols, compounds that are significant
to color and astringency but less relevant
to teas such as shaded green tea production,
dominates the l i terature. Low
polyphenol content and high chlorophyll
content are important for producing an emerald-
green and smooth finished green tea
product that lacks astringency, and the brothy
character of the amino acids, and flowery
character of the aroma constituents, play a
much more significant role. In addition to
the nonpolyphenolic consti tuents, the
polyphenols of black tea are a poorly understood
but seemingly well-defined group of
compounds. The use of "thearubigen" in the
literature signifies a wide group of compounds
whose chemical identity has not been
traced to any identifiable chemical group. Its
use was most significant as a colorimetric
indicator for plantation production, but as a
chemical identifier its use has seemed to
hamper true identification of the mass balance
of black tea polyphenols. Work at identifying
these compounds in a systematic fasion has
begun, and it is hoped that future research
will deemphasize the term ' thearubigen' in
favor of more chemically accurate descriptors
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