2.2 Preparation of Water Extract of Dried C. campestris
About 200g of fresh C. campestris was dried in an oven at 40°C for 48h, after dried, take 40g of dried were
pounded into powdered form, and about 8L of distilled water were then added in a conical flask, and left to soak
for 24h. The mixture was then filtered through four layers of cheesecloth. The supernatant was filtered again
using paper “Whatman no. 42” as a stock solution for water extract of dried C. campestris (40g /8L= 5000ppm).