Fig. 4From: Oleaginous yeast platform for producing biofuels via co-solvent hydrothermal liquefactionScanning electron microscope (SEM) images. a, b for raw (unprocessed) yeast, and c-d for solid char obtained from non-catalytic co-solvent HTL at 240 °C. Left column SEM images a, c were obtained at ×250 magnification; SEM images b, d were obtained at ×3500 magnificationsBack to article page