The optimal condition for Moringa oleifera root barks extraction was determined using response surface methodology and Box-Behnken Design. The actual optimal condition of the factors was 65 o C, ethanol 60%, 40 (mL/g) liquid-to-solid ratio with 240 minutes extraction time. The enrichment of phenolic compounds sharply affected the antioxidant, and inhibitions of α-amylase enzyme, as well as, the anti-inflammatory effect of the extract from M. oleifera root barks. The extract in the optimal condition exhibited better 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging and α-amylase inhibitory activities than those of positive controls.Also, the extract showed weak hydroxyl free radical scavenging and nitric oxide (NO) production inhibitory effects. These revealed a simple and promising method for the preparation of bioactive products from the root bark of M. oleifera.

The study aimed to evaluate the community-based prevention and control of haemorrhagic dengue fever vector in Thanh binh and Thanh loc Dan precinct, Danang City during 1997-2000. The results has shown that strengthen of the community concept, regular monitoring of the water tanks and immediate treatment of water tank containing aedes aegypti reduced mosquito colony and mobilized the participation of community effectively the combination of 2 above methods with use of mesocyclops obtained the high efficacy.
Copepoda ; Dengue