Table 1 Content and antioxidant capacity of antioxidant compounds in O. fragrans flowers and green tea before and after the simulated digestion.

From: Antioxidant synergistic effects of Osmanthus fragrans flowers with green tea and their major contributed antioxidant compounds

Sample

Compound

Content(mg/g DW)

EC50(μg)

After

Before

After

Before

O. fragrans flowers

Act

10.77 ± 0.01

62.46 ± 0.82**

1.42 ± 0.08

0.89 ± 0.05**

IsoAct

0.39 ± 0.00

2.86 ± 0.01**

1.07 ± 0.18

1.46 ± 0.16*

ChA

0.27 ± 0.02

1.19 ± 0.06*

1.93 ± 0.15

0.81 ± 0.04**

CA

0.08 ± 0.00

0.18 ± 0.00**

2.85 ± 0.21

0.55 ± 0.03**

SAL

1.51 ± 0.03

4.60 ± 0.09*

/

/

Longjing Tea

C

0.54 ± 0.01

1.16 ± 0.01**

1.49 ± 0.08

1.42 ± 0.49

CAF

10. 86 ± 0.45

23.01 ± 0.02*

/

/

EC

1.82 ± 0.04

7.02 ± 0.08*

1.21 ± 0.05

0.88 ± 0.11**

ECG

0.19 ± 0.03

1.78 ± 0.07**

1.96 ± 0.09

0.45 ± 0.05**

EGC

1.12 ± 0.05

3.86 ± 0.09**

0.92 ± 0.04

0.51 ± 0.03*

EGCG

nd

10.65 ± 0.92*

1.44 ± 0.10

0.98 ± 0.04*

GA

2.06 ± 0.06

3.76 ± 0.09**

0.88 ± 0.07

1.54 ± 0.21**

GC

1.14 ± 0.06

0.39 ± 0.05**

2.50 ± 0.12

1.23 ± 0.10**

GCG

0.74 ± 0.13

3.30 ± 0.11**

0.99 ± 0.05

0.62 ± 0.06*

  1. Act: actoside Verbascoside; IsoAct: isoacteoside; ChA: chlorogenic acid; CA: caffeic acid; SAL: salidroside; C: catechin; CAF: caffeine; EGCG: (−)-Epigallocatechin gallate; EC: L-Epicatechin; ECG: (−)-Epicatechin gallate; EGC: (−)-Epigallocatechin; GA: gallic acid; GC: (−)-gallocatechin; GCG: (−)-Gallocatechin gallate. Values are expressed as means ± SD (n = 3). nd: Not detected.
  2. EC50: concentration of antioxidant for 50% of maximum effect. The concentration was showed in μg for the final reaction volume (250 μL). *Value and **Value was significantly different from that after simulated digestion at P < 0.05 and P < 0.01, respectively.
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