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We used a non toxic, oil-based modeling clay but you could also use a polymer clay like Sculpey. Playdough and ceramic clay will not work for this activity since they will soften and eventually dissolve in water. For a little extra fun, I also grabbed a piece of wax paper, some toothpicks, and tape to make sails.
Results shown in Figure 2 represent growth dynamics of spontaneous sourdough microflora during fermentation process and changes of pH value. The initial rates of plate count were very close â 4.27 log10 cfu ml -1 (LAB), 4.54 log10 cfu ml -1 (yeasts), 4.72 log10 cfu ml -1 (total plate count).here were three stages of sourdough preparation totally 72 hours; the renewal of sourdough was realized each 24 hours (Figure 1). 10 grams of sourdough in 90ml 0.5% sterile physiological liquid were mixed in BagMixer Â® at speed 7 for 60 seconds. Plate counting method was used for microbial detection.