cover
Article Per Year (5 Year)
All
Home Page
OAI Link
Editorial Team
Contact
Reviewer
Google Scholar
Contact Name
Yulianti
Contact Email
yuliatibora@gmail.com
Phone
-
Journal Mail Official
teknologihasilpertanianug@gmail.com
Editorial Address
-
Location
Kota gorontalo,
Gorontalo
INDONESIA
Gorontalo Agriculture Technology Journal
Published by Universitas Gorontalo
ISSN : 26141140     EISSN : 26142848     DOI : -
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Gorontalo Agriculture Technology Journal (GATJ) adalah media aplikasi bagi akademisi, peneliti dan praktisi untuk menerbitkan hasil-hasil penelitian dan artikel penelitian yang berhubungan dengan teknologi pertanian.
Arjuna Subject : -
Articles 51 Documents
 2   3   4   5   6 
Phytochemical Characteristics and Antioxidant Activity of Liang Tea at Different pH During Storage Yohana Sutiknyawati Kusuma Dewi
Gorontalo Agriculture Technology Journal Volume 5 Nomor 2 Oktober 2022
Publisher : Universitas Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32662/gatj.v0i0.2436

Abstract

Tea is a popular beverage consumed in Pontianak City, Indonesia. The ingredients of tea were consist of the leaves of D.chinensis, R.discolor, O.aristatus, P.amaryllifolius, heartwood of C.sappan and peels of A.vera with certain ratio. The study aims to find out the effect of storage time on phytochemical content and antioxidant activity of  liang tea with different pH. The liang tea was prepared by hot brewing of the tea ingredients for 6 minutes and let it cooled down. The pH of tea adjusted to 4, 5, 6 and 6,5 by adding citric acid buffer and stored in plastic container and leave it at room temperature. The observed parameters were pH, vitamin C content, Total Soluble Solid (TSS), total phenolic content, total flavonoid content and antioxidant activity by DPPH scavenging method. Each of mentioned parameters of tea were observed for 17 days, with 2 days interval measurement. The treatment was replicated five times. The results in averaged time showed that liang tea with pH 4 possess highest total phenolic content and TSS (13.04 ± 1.21 mgGAE/g dw and 2.40 ± 0.3oBrix respectively) and pH 5 liang tea possess highest vitamin C, total flavonoid content and antioxidant activity (5.49 ± 0.94 mg/100ml; 20.02 ± 2.12 mgQE/g dw and 40.38 ± 4.37 % respectively. Base on the result showed the optimum pH of liang tea during storage was ranged 4 to 5, which pH 4 liang tea possess highest total phenolic content and total dissolved solid and pH 5 liang tea possess highest vitamin C, total flavonoid content and antioxidant activity.

Page 6 of 6 | Total Record : 51

 2   3   4   5   6 

Filter by Year

2018 2022


Reset
Filter By Issues
All Issue Volume 5 Nomor 2 Oktober 2022 Volume 5 Nomor 1 April 2022 Volume 4 Nomor 2 Oktober 2021 Volume 4 Nomor 1 April 2021 Volume 3 Nomor 2 Oktober 2020 Volume 3 Nomor 1 April 2020 Volume 2 Nomor 2 October 2019 Volume 2 Nomor 1 April 2019 Volume 2 Nomor 1 April 2019 Volume 1 Nomor 2 October 2018 Volume 1 Nomor 1 April 2018 Volume 1 Nomor 1 April 2018 More Issue