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Table 5 Activity of partitioned fractions against six bacterial strains

From: Isolation of antibacterial compounds from Quercus dilatata L. through bioassay guided fractionation

Partitioned fractions

Zone of inhibition (mm)

E. coli

S. aurs

B. sub

M. leu

B. bron

S. set

(A) Q. dilatata

9.3l ±0.333

9.7kl ± 0.33

9.7kl ±0.33

10.2jkl ±0.34

11.2ghij ±0.17

9.3l ±0.33

Hexane

-

-

-

-

-

-

Ethyl acetate

11.5fghi

±0.28

11.2ghij

±0.2

10.7hijk

±0.3

9.7kl

±0.3

10.7hijk

±0.3

10kl

±0.5

Chloroform

-

-

-

-

-

-

Acetone

12.5ef

±0.3

13.9d

±0.1

13.5de

±0.28

14d

±0.5

13.7d

±0.8

12.3f

±0.3

Ethanol

16ab

±0.6

16.17ab

±0.17

14.3cd

±0.7

15.2bc

±0.6

16.17ab

±0.6

16.7a

±0.3

50% methanol

10.5ijk

±0.3

11.5fghi

±0.28

11.7fghi

±0.2

11.5fghi

±0.3

12.5ef

±0.5

12fg

±0.28

R

13.5±0.3

25.4±0.3

11.2±0.4

10.8±0.4

31.5±0.8

10.5±0.3

C

32.8±0.4

35.9±0.6

31.8±0.2

29.6±0.4

18.17± 0.4

29.5±0.5

E. coli:-

Escherichia coli

B. sub:-

Bacillus subtillus

B. bron:-

Bordetella bronchiseptica

S. aur:-

Staphylococcus aureus

M. leu:-

Micrococcus luteus

S. set:-

Salmonella setuball

C

Cefixime

R

Roxithromycin

Conc

Concentrations

  1. The data represents the mean values of three replicates ± represents standard deviation.
  2. Letters ranging from a to k indicate respective Least Significant Difference rank orders of mean values. Values with similar letters are not significantly different from each other at p > 0.05.