Table 4. Total phenols and antioxidant capacity of carob, maple and date syrups expressed on dry mass basis.
| Carob accession | w(total phenols as GAE)/(g/100 g) | Antioxidant capacity | ||||||
|---|---|---|---|---|---|---|---|---|
| FRAP/(μmol/100 g) | I(g/L) | TE/(mmol/100 g) | ||||||
| Akkar | (728±84)f | (2.0±0.0)efg | (32.0±2.0)ab | (5.6±1.1)ghi | ||||
| Selaata | (732±73)f | (1.4±0.3)bcde | (16.5±1.5)ab | (6.3±0.8)hi | ||||
| Wadi El Hojeir | (1368±40)g | (1.65±0.03)cdef | (17.0±0.6)ab | (5.6±0.6)ghi | ||||
| Batroun | (443±69)cd | (0.67±0.06)ab | (18.6±0.9)ab | (4.2±0.7)def | ||||
| Maaroub | (370±84)bc | (1.4±0.5)bcde | (46.2±6.8)b | (2.5±0.4)bc | ||||
| Bourjin | (781±56)f | (2.4±1.0)fg | (16.6±1.5)ab | (8.3±0.9)j | ||||
| Marjayoun | (358±12)b | (1.14±0.08)bcd | (26.6±0.9)ab | (3.2±0.8)bcd | ||||
| AUB1 | (494±15)de | (1.13±0.04)bcd | (14.4±1.9)ab | (4.6±0.1)efg | ||||
| AUB2 | (701±62)f | (2.68±0.04)g | (13.7±0.8)ab | (4.9±0.6)efg | ||||
| AUB3 | (521±13)de | (0.94±0.08)bcd | (18.7±0.0)ab | (4.4±0.8)defg | ||||
| AUB4 | (442±48)f | (1.4±0.1)bcde | (34.1±0.9)ab | (3.6±0.7)cde | ||||
| AUB6 | (453±8)de | (1.5±0.2)bcde | (24.2±1.8)ab | (2.3±1.0)bc | ||||
| AUB7 | (487.4±1.3)e | (1.8±0.3)def | (21.1±2.8)ab | (4.2±0.2)def | ||||
| AUB8 | (345±52)b | (0.86±0.02)abc | (36.3±0.7)ab | (2.5±0.2)bc | ||||
| AUB9 | (734±84)cd | (1.4±0.8)bcde | (20.2±0.2)ab | (5.2±0.5)fgh | ||||
| AUB10 | (1566.4±2.3)h | (2.7±0.4)g | (10.1±1.3)ab | (6.6±0.7)i | ||||
| AUB11 | (336±38)ab | (1.02±0.08)bcd | (36.3±1.0)ab | (2.4±0.2)bc | ||||
| AUB12 | (2215±6)i | (14.9±1.4)h | (4.9±0.7)a | (20.5±2.2)k | ||||
| AUB14 | (741±17)f | (2.4±0.8)fg | (19.9±0.0)ab | (5.6±0.5)ghi | ||||
| Date syrup | (461±13)de | (1.06±0.02)bcd | (33.7±0.6)ab | (2.1±0.0)b | ||||
| Amber maple syrup | (261.0±2.6)a | (0.10±0.00)a | (647±14)c | (0.4±0.0)a | ||||
| Dark maple syrup | (314.0±2.3)ab | (0.11±0.00)a | (501±59)d | (0.4±0.0)a | ||||
| Range of carob syrups | 336−2214 | 0.7−14.9 | 4.9−46.2 | 2.3−20.5 | ||||
| Mean±S.D. of carob syrups | 729±487 | 2.3±3.1 | 23.0±10.8 | 5.4±4.0 | ||||
GAE=gallic acid equivalents, TE=Trolox equivalents, FRAP=ferric reducing antioxidant power, TEAC=Trolox equivalent antioxidant capacity, DPPH=2,2-diphenyl-1-picrylhydrazyl. Values with different letters in superscript in the same column are significantly different (p<0.05) according to Duncan’s multiple range test. AUB1 to AUB14=American University of Beirut