@article{Taokaenchan_Areesrisom_Areesrisom_Sateinperakul_2021, title={Effect of Harvest Maturity on Potassium Value Secondary Metabolites and Antioxidant Activity of Orthosiphon aristatus (Blume) Miq.}, volume={13}, url={https://li01.tci-thaijo.org/index.php/rmutsvrj/article/view/241942}, abstractNote={<p>This research investigated the effects of four stages of harvest maturity (30, 60, 90 and 120 days after planting) on potassium, secondary metabolites, and antioxidant activity of <em>Orthosiphon aristatus</em> (Blume) Miq. The experiment was arranged in a complete randomized design (CRD). Results showed that there were significant different harvesting maturities. The highest potassium content (5.02 g/100 g DW) was harvesting time at 30 days. The caffeic acid and rosmarinic acid (1.47 and 26.24 mg/kg DW) were highest with harvesting time at 60 days. In addition, the phenolic content and DPPH radical scavenging capacity (50.48 mgGAE/100 g DW and IC <sub>50</sub> being equal to 0.68 mg/mL) were found highest at harvesting time in 120 days after planting. Therefore, based on the findings, harvesting time at 120 days is recommended to farmers for optimum constituents of <em>Orthosiphon aristatus</em> (Blume) Miq. production.</p>}, number={3}, journal={Rajamangala University of Technology Srivijaya Research Journal}, author={Taokaenchan, Narin and Areesrisom, Koblab and Areesrisom, Pawinee and Sateinperakul, Sakchai}, year={2021}, month={Dec.}, pages={754–763} }