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Official Journal of the Japan Wood Research Society

Table 3 Antibacterial properties of compounded papers containing the ground theca against Escherichia coli

From: Functional evaluation of horse chestnut seed and its application in the production of compounded paper for effective utilization of an untapped resource

Sample

Incubation time (h)

Antibacterial properties

Bacteria yielded growth valuesd

Viable bacteria (CFUa/ml)

Antibacterial activity valuec

Before incubation

0

1.00 × 105

 

100 wt% pulp paper

18

1.58 × 107

−0.05

 

Paper containing 20wt% of theca

18

1.10 × 107

0.11

 

Paper containing 40wt% of theca

18

9.20 × 106

0.19

 

Paper containing 60wt% of theca

18

3.96 × 105

1.55

 

Only ground outer theca

18

NDb

 

Only bacteria

18

1.42 × 107

2.15

  1. aColony-forming units
  2. bNot detected
  3. cAntibacterial activity value = (log C t – log C 0) − (log T t – log T 0); where log C t log(average (viable cell count after incubation with 100 wt% pulp paper for a given period)); log C 0 log(average (viable cell count before incubation)); log T t log(average (viable cell count after incubation of the inoculated samples for a given period)); log T 0 log(average (viable cell count of the samples immediately after inoculation))
  4. dBacteria yielded growth values = log C t – log C 0