0.28∘C0.28^{\circ} \mathrm{C}0.28∘C
0.26∘C0.26^{\circ} \mathrm{C}0.26∘C
0.24∘C0.24^{\circ} \mathrm{C}0.24∘C
0.21∘C0.21^{\circ} \mathrm{C}0.21∘C