檳榔甲醇抽出物 荖花甲醇抽出物 荖葉甲醇抽出物 抑菌作用 最小抑菌濃度 最小殺菌濃度 MIC MBC Methanol extract of areca nut Methanol extract of betel pepper fruits Methanol extract of betel pepper leaves Antimicrobial activity The minimum inhibitory concentration The minimum bactericidal concentration