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Official Journal of the Japan Wood Research Society

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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