Figure 4From: Development of method for evaluating cell hardness and correlation between bacterial spore hardness and durabilityCorrelation between hardness (Young’s modulus) and indirect measurements of heat and UV resistance. (A) Young’s modulus vs. D121 values. (B) Young’s modulus vs. irradiation energy. Key for both panels: □, Geobacillus stearothermophilus; Δ, Bacillus coagulans; ○, Bacillus subtilis; ▴, Bacillus licheniformis; ●, Bacillus megaterium.Back to article page