Gels were analyzed employing scanning electron microscopy (SEM). Samples were fixed overnight in 3% glutaraldehyde in 25 mM phosphate buffer. Then, samples were dehydrated in a graded ethanol series and once 100% ethanol was achieved, they were moved in a graded acetone series, so samples were finally in 100% acetone. The samples were critical point dried through CO2 in a Bal-Tec CPD 030 Critical Point Dryer. Dry fractions were fractured and torn with a blade; fragments were mounted on aluminum SEM stubs and coated with gold in a Sputtering Balzers SCD 004.The microscope used was the JEOL-6610LV SEM.