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Morphology of the interaction of protectants and L. casei K17 cell by scanning electron micrograph. (A) Morphology of L. casei K17 cell without the addition of protectant. (B) Morphology of L. casei K17 cell with monolayer protectant. (C) Morphology of L. casei K17 cell with bilayer protectant. (D) Morphology of L. casei K17 cell with trilayer protectant.
