Mgbe anyị na-ekwu maka tii, anyị na-ekwukarị banyere ịgba ụka zuru ezu, ọkara-fermentation, na ọkụ gbaa ụka. Nkeigwe gbaa ụkabụ igwe nhazi a na-ejikarị eme ihe na usoro ịgba ụka tii. Ka anyị mụta banyere gbaa ụka nke tii.

Fermentation nke tii - ndu oxidation

A na-ekewa tii China n'ime ụdị tii isii dị ka ogo dị iche iche nke gbaa ụka na ụzọ mmepụta zuru oke. Na tii, a na-edozi otu akwụkwọ ndụ akwụkwọ ndụ ka ọ bụrụ tii tii, tii ojii, tii oolong, wdg site na oxidation biological achịkwa, usoro nke a na-akpọkwa fermentation na-ezighi ezi. Usoro a dị ka usoro mmeghachi omume enzymatic, ma eleghị anya, a ga-akpọ ya oxidation bayoloji. Site n'enyemaka nke oxidation bayoloji nke mgbidi tii cell mebiri naigwe gbaa agba tii, oxidases dị na mgbidi cell na-akwalite usoro oxidation nke catechins.

N'ime mkpụrụ ndụ tii, catechins dị na mmiri cell, ebe oxidase na-adịkarị na mgbidi cell, ọ bụghị na microorganisms, ya mere mgbidi cell kwesịrị imebi. Nke a na-akọwa n'ụzọ nkịtị ihe kpatara tii fermented chọrọ iji a na-atụgharịtii akwukwo roller. Dabere na ogo dị iche iche nke oxidation nke polyphenols, enwere ike kewaa ya n'ime gbaa ụka zuru oke, ọkara-fermentation na gbaa ụka. Na tii ojii, ogo oxidation nke polyphenols dị oke elu, nke a na-akpọ gbaa ụka zuru oke; na tii oolong, ogo oxidation nke polyphenols dị ihe dị ka ọkara, nke a na-akpọ ọkara-fermentation.

N'elu bụ isi pụtara gbaa ụka mgbe kwuru na Chinese tii. Otú ọ dị, n'ihi ụdị tii dị iche iche na China, usoro nhazi na usoro nkwadebe bara ụba, na nkọwa dị iche iche nke àgwà, ndị mmadụ na-ejikarị eme ihe.igwe eletriki tii gbaa ụkaiji mepụta gbaa ụka. Na mmepụta na usoro nhazi nke ụfọdụ akwụkwọ tii, na mgbakwunye na nke ahụ a kpọtụrụ aha n'elu n'echiche nke oxidation bayoloji na mgbakwunye na mmeghachi omume enzymatic nke ya, microorganisms ga-etinyekwa aka na njikọ ụfọdụ.