Alginate (Sigma-Aldrich chemical Co. St. Louis, USA) solutions (2%w/v)were prepared in sterilized distilledwater at a controlled temperature (80 °C) and were stirred to become clear
Calcium chloride (Sigma-Aldrich chemical Co. St. Louis, USA) solution (2% w/v) was also prepared in distilled water and sterilized by autoclaving (121 °C,15 min).
The stock solution of nisin (Sigma-Aldrich chemical Co. St. Louis, USA) was prepared by dissolving nisin in HCl (Merck, Darmstadt, Germany) (106 IU/ml) and filtration of the solution through a 0.2 μm pore filter.
Alginate (Sigma-Aldrich chemical Co. St. Louis, USA) solutions (2%w/v)were prepared in sterilized distilledwater at a controlled temperature (80 °C) and were stirred to become clearCalcium chloride (Sigma-Aldrich chemical Co. St. Louis, USA) solution (2% w/v) was also prepared in distilled water and sterilized by autoclaving (121 °C,15 min). The stock solution of nisin (Sigma-Aldrich chemical Co. St. Louis, USA) was prepared by dissolving nisin in HCl (Merck, Darmstadt, Germany) (106 IU/ml) and filtration of the solution through a 0.2 μm pore filter.
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