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Table 2 Effect of single-factors on extraction of zerumbone from Z. zerumbet rhizome using microwave extraction method

From: Optimization of microwave-assisted extraction of zerumbone from Zingiber zerumbet L. rhizome and evaluation of antiproliferative activity of optimized extracts

Single-factor experiments
Ethanol/water (% v/v) Irradiation time (s) MW Power (W) Liquid-to-solid ratio (mL/g)
(% v/v) Zerumbone (mg/g DM) (s) Zerumbone (mg/g DM) (W) Zerumbone (mg/g DM) Ratio (mL/g) Zerumbone (mg/g DM)
20 4.11 ± 0.17b 30 4.15 ± 0.10d 300 3.78 ± 0.09c 10 3.26 ± 0.08e
40 4.87 ± 0.13a 60 5.1 ± 0.18a 400 4.32 ± 0.12b 20 3.88 ± 0.09d
60 3.66 ± 0.08c 90 4.86 ± 0.15b 500 4.65 ± 0.10a 25 4.21 ± 0.16c
80 3.43 ± 0.14d 120 4.45 ± 0.16c 600 3.55 ± 0.08d 30 5.08 ± 0.18a
100 3.25 ± 0.09e 180 4.30 ± 0.17c 700 3.21 ± 0.08e 40 4.76 ± 0.15b
   210 3.52 ± 0.11e 800 2.91 ± 0.06f   
  1. All analyses are the mean of triplicate measurements ± standard deviation. Means not sharing a common letter in each column were significantly different at P < 0.05