The chemistry of tea
This presentation is the property of its rightful owner.
Sponsored Links
1 / 7

THE CHEMISTRY OF TEA PowerPoint PPT Presentation


  • 66 Views
  • Uploaded on
  • Presentation posted in: General

THE CHEMISTRY OF TEA. BY : KESSHIA ROBALINO PD: 4. APPLICATIONS!!!. Reactions: Enzymes polyphenol oxidase (PPO) Peroxidase ( PO) Polyphenols Catechin -> C Picatechin -> EC Epichatechin gallate -> ECG Epigallocatechin gallate -> EGCG Gallocatechin -> GC  Epigallocatechin(EGC).

Download Presentation

THE CHEMISTRY OF TEA

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


The chemistry of tea

THE CHEMISTRY OF TEA

BY : KESSHIA ROBALINO

PD: 4


Applications

APPLICATIONS!!!

  • Reactions:

    • Enzymes

      • polyphenol oxidase (PPO)

      • Peroxidase (PO)

  • Polyphenols

    • Catechin -> C

    • Picatechin -> EC

    • Epichatechin gallate -> ECG

    • Epigallocatechin gallate -> EGCG

    • Gallocatechin -> GC 

    • Epigallocatechin(EGC)

  • Inorganic components:

    • K, Ca, Ph, Mg, Mn, Fe, S, Al, Na, Si, Zn, and Cu.

    • Three-quarters of the nitrogen: amino acids (theanine)

    • alkaloid caffeine.

    • carbohydrates


The chemistry of tea

STRUCTURES

OF

TEA (CATECHINS)


What happens during tea processing

What Happens during Tea Processing?

  • Tea comes from one plant, Camellia Sinensis

  • C, EC, ECG, GC, EGC, & EGCG are oxidized by the enzyme PPO

  • 1st : orthoquinones (very unstable & reactive)

  • Function: hydrogen acceptors /hydrogen donors

  • combinations :C-O or C-C bonds [theaflavins (TF)]

  • EGC + EC = Theaflavin

  • EGCG + EC = Theaflavin-3 monogallate

  • EGCG + ECG = Theaflavin 3’3’ digallate

  • EGC + ECG = Theaflavin –3’- monogallate

  • GC + EC = sotheaflavin

  • GC + C = Neotheaflavin


Comparisons between enzimes

COMPARISONS BETWEEN ENZIMES

FRUIT & VEGETABLES

TEA

  • ANTIOXIDANTS


Caffeine content in tea

CAFFEINE CONTENT IN TEA


Citations

CITATIONS

  • http://www.angelfire.com/pro/chemist_emily_f/chemistsinabigworld.html

  • http://antoine.frostburg.edu/chem/sense/101/consumer/faq.shtml

  • http://www.i-sis.org.uk/graphics/Tea-polyphenols.jpg

  • http://www.greenteatoday.com/wp-content/uploads/2009/12/green-tea-catechin.png

  • http://www.cerbona.hu/en/Womens_magazine_Teahouse_The_active_ingredients_of_tea.html


  • Login