Potency of Fresh and Rotten Leaves of Gaharu (Wikstroemia tenuiramis Miq) Sumatera Endemic as Raw Material of Antioxidant Rich Tea

4th International Conference on Biological Sciences and Biotechnology

Surjanto^1 ; Batubara, Ridwanti^3 ; Hanum, Tengku Ismanelly^1^2 ; Julianti, Elisa^4

Faculty of Pharmacy, Universitas Sumatera Utara, Kampus USU, Jl. Tri Dharma No. 5, Medan

20155, Indonesia^1

Nanomedicine Center of Innovation, Universitas Sumatera Utara, Medan

20155, Indonesia^2

Faculty of Forestry, Universitas Sumatera Utara, Kampus USU, Jl. Tri Dharma Ujung No. 1, Medan

20155, Indonesia^3

Faculty of Agriculture, Universitas Sumatera Utara, Kampus USU, Jl. Prof A. Sofyan No. 3, Medan

20155, Indonesia^4

关键词: Anti-oxidant activities;    Consumer preferences;    Endemic species;    Ethanol extract;    Inhibitory concentration;    Leaf extracts;    Phytochemical;    Stage of growth;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/305/1/012061/pdf
DOI  :  10.1088/1755-1315/305/1/012061

来源: IOP

【 摘 要 】

Gaharu (agarwood) distibutes in nature and endemic species of Sumatera (W. Tenuiramis Miq). Along with the knowledge of development gaharu leaf has been used as raw material of tea drink. The aim of this study is to see if gaharu species W. tenuiramis Miq has potential as an alternative tea, both fresh leaves and rotten leaves by looking at a group of chemical compounds contained in gaharu leaf that serve as anti-oxidants, to know the strength of antioxidant activity from gaharu leaf extract and to search the content of chemical compounds and to test the level of consumer preference with hedonic test. The fresh gaharu leaf from a tree that grows naturally in nature taken based on the stage of growth namely fresh leaves and rotten leaves. The leaf that has been made simplicia was extracted with 96% ethanol solvent. The phytochemical screening includes examination of alkaloids class compounds, glycosides, steroids/triterpenoids, flavonoids, tannins and saponins. The antioxidant activity test was conducted by DPPH method to get the value IC50 (Inhibitory Concentration). The results showed that the ethanol extract of young leaves and old leaves of gaharu containing the class of flavonoid compounds, glycosides, steroids/triterpenoids and tannins. The results testing of antioxidant activity showed that fresh leaves extract and rotten leaves of gaharu have IC50 value ethanol solvent and hot water respectively, were 27,78 and 28,80; 25,35 and 28,59 μg/ml,