Effect of Gamma Irradiation on Angiotensin Converting Enzyme Inhibition, Antioxidant Activity, Total Phenolic Compound and Total Flavonoid of Peperomia pellucida Herbs Extract, Adhitia, Anies Monica, Octaviani Alisa Nur,, Basah Katrin, and Mun?im Abdul , Pharmacognosy Journal, February 2017, Volume 9, Issue 2, p.244-248, (2017)