Extraction was carried out at 55 C in a water bath (W350, Memmert, Schwabach, Germany) and the mixtures were stirred continuously for 6 h using an overhead stirrer (RW 20.n, IKA labortechnik, Germany) at a speed of 150 rpm.
Extraction was carried out at 55 C in a water bath (W350, Memmert, Schwabach,Germany) and the mixtures were stirred continuously for 6 h usingan overhead stirrer (RW 20.n, IKA labortechnik, Germany) at aspeed of 150 rpm.