“…Polarized optical microscopy (ECLIPSE Ci POL, Nikon, Tokyo, Japan) was also used to investigate the structure of the liquid crystalline phase (Amar-Yuli and Garti, 2005;Pindzola et al, 2003;Gurfinkel et al, 2011;Farkas et al, 2007). LCFS (15 ml) was dropped and thinly spread on the glass slide.…”