“…John's Wort Robert W. Coppock and Margitta Dziwenka dioxide, water, ethanol, methanol, oils, and other solvents), ratio of plant material to solvent, and extraction temperatures (Linde, 2009;Cossuta et al, 2012). John's Wort Robert W. Coppock and Margitta Dziwenka dioxide, water, ethanol, methanol, oils, and other solvents), ratio of plant material to solvent, and extraction temperatures (Linde, 2009;Cossuta et al, 2012).…”