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  Indian J Med Microbiol
 

Figure 3: Response surface plot for the effects of extraction conditions for rosmarinic acid from the leaves of Melissa officinalis L., (a) extraction temperature and methanol concentration, (b) extraction temperature and solvent-to-material ratio, (c) methanol concentration and solvent-to-material ratio

Figure 3: Response surface plot for the effects of extraction conditions for rosmarinic acid from the leaves of <i>Melissa officinalis</i> L., (a) extraction temperature and methanol concentration, (b) extraction temperature and solvent-to-material ratio, (c) methanol concentration and solvent-to-material ratio