Table 6. Angiotensin converting enzyme(ACE) inhibitory activity of 70% ethanol extracts of grape fruit stem with different drying methods

Measurement	GFSF¹⁾	GFSI²⁾	GFSH³⁾	GFSS⁴⁾	Positive control (500 μg/mL)
Measurement	GFSF¹⁾	GFSI²⁾	GFSH³⁾	GFSS⁴⁾	Rutin	Cathechin
ACE inhibitory activity (%, 500 μg/mL)	61.13±2.10⁵⁾^b⁶⁾	66.79±2.10^a	55.58±1.07^c	53.54±1.66^c	92.49±1.37^A	87.72±2.11^B

¹^-⁴⁾Abbreviations: GFSF, ethanol extract of grape fruit stem with freeze drying; GFSI, ethanol extract of grape fruit stem with infrared drying; GFSH, ethanol extract of grape fruit stem with heat air drying; GFSS, ethanol extract of grape fruit stem with sun drying.
⁵⁾Values are means±SD of triplicate determinations.
⁶⁾Different superscripts within a row (a-c) and (A-B) indicate significant differences (p<0.05).