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Table 1 Factors and Levels of Box-Behnken

From: Optimization for ultrasonic-microwave synergetic extraction of total iridoid glycosides and screening of analgesic and anti-inflammatory active fractions from patrinia scabra Bunge (Valerianaceae)

Levels

Factor

A

B

C

D

−1

40

1:16

500

40

0

50

1:18

600

45

1

60

1:20

700

50

  1. Note: A ethanol concentration (%), B material-to-liquid ratio (g.mL−1), C: microwave power (W), D extraction time (min)
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BMC Complementary Medicine and Therapies

ISSN: 2662-7671

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