Fig. 2.

Light microscopy photographs ($40\times$) of porcine RBCs: (a) before the OA thermometry procedure, (b) following the deep cooling (down to $-20°\mathrm{C}$) only, and (c) after deep cooling accompanied by the pulsed laser irradiation at 805 nm. (d) Absorbance spectra of the blood plasma demonstrating absence of extracellular hemoglobin after the deep cooling and OA thermometry of blood samples. The utilized laser wavelength is indicated by the arrow. (e) and (f) Illustration of RBCs damaged by fast cooling ($\sim 10°\mathrm{C}/\mathrm{s}$) and heating, respectively.