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Table 1 Antimicrobial activity of TPS composite films containing Cu and Si-Cu particles against S. aureus and E. coli

From: Flexible thermoplastic starch films functionalized with copper particles for packaging of food products

Sample

S. aureus

E. coli

CFU/mL

D%

R (log)

CFU/mL

D%

R (log)

TPS

2.6 × 106

1.6 × 107

TPS/Cu0.25

60

99.998

4.6

2.6 × 104

99.838

2.8

TPS/Cu0.50

32

99.999

4.9

4.0 × 103

99.975

3.6

TPS/Cu0.75

18

99.999

5.2

1.3 × 104

99.919

3.1

TPS/Si-Cu0.25

77

99.997

4.5

7.3 × 103

99.954

3.3

TPS/Si-Cu0.50

100

99.996

4.4

4.0 × 103

99.975

3.6

TPS/Si-Cu0.75

24

99.999

5.0

1.3 × 103

99.999

5.1