Material and Methods
Plant materials
The plant materials were obtained from Pusat
Pembangunan Komoditi Sendayan, Seremban,
Negeri Sembilan and University Agriculture Park
(TPU), UPM. The leaves and stems were cut into
small pieces and dried in ventilated drying oven at
40°C for 24 hours. They were then ground to a fine
powder (particle size 0.70 mm) and stored in air-tig