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Response surfaces representations for the yield of oil (a–f) from Lepidium apetalum seed. (a) Effect of pressure (P) and temperature (T) under fixed flow rate (F) 25L/h and extraction time (t) 90 min; (b) Effect of P and t at F = 25 L/h and T = 60 °C; (c) Effect of F and P at T = 60 °C and t = 90 min; (d) Effect of T and t at P = 25 MPa and F = 25 L/h; (e) Effect of F and T at P = 25 MPa and t = 90 min; (f) Effect of F and t at P = 25 MPa and T = 60 °C.
