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Applied Biological Chemistry
Fig. 4 | Applied Biological Chemistry

Fig. 4

From: Standardization of Rehmannia glutinosa (Gaertn.) DC. steam processing and evaluation of its chemical, anti-oxidant, and anti-inflammatory properties

Fig. 4

Effect of different steaming times (five times) and steaming duration (1 h, 2 h, and 4 h) on marker compounds content of R. glutinosa samples. a Catalpol content of R. glutinosa samples. b 5-HMF content of R. glutinosa samples. c Verbacoside content of R. glutinosa samples. d Iso-verbacoside content of R. glutinosa samples. *UPR Unprocessed R. glutinosa, PRR Processed R. glutinosa. Values are presented as means ± standard deviation. Same letters are not significantly different by Tukey’s test and p = 0.05

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