Biomedical Engineering Reference
In-Depth Information
Control
1000 ppm
3000 ppm
5000 ppm
(A)
1000 ppm
Control
5000 ppm
3000 ppm
(B)
Control
1000 ppm
5000 ppm
3000 ppm
(C)
FIGURE 18.4
Antibacterial. activity. of. CaO. nanoparticles. in. toluene. against.
E. coli
. (A),.
S. Epidermidis
(B),. and.
S. aureus
. (C).
with.concentrations.of.1,000,.3,000,.and.5,000.ppm..(From.Channei,.D.,.et.al.,.Antimicrobial.Activity.of.Nano.
Calcium.Oxide.Synthesized.by.the.Thermal-Decomposition.Method,.paper.presented.at.Proceedings.of.the.26th.
Microscopy.Society.of.Thailand.(MST).Annual.Conference,.Chiang.Mai,.Thailand,.January.28-30,.2009.)
Based. on. our. observation. and. shown. in. Table 18.4,. there. was. little. difference. in. the.
diameter.across.the.inhibition.zone.between.100.μl.of.50.and.100.ppm.suspension.of.ZnO.
nanoparticles..The.minimum.inhibitory.concentration.of.ZnO.nanoparticles.toward.four.
kinds. of. fungi. and. three. kinds. of. bacteria. was. found. to. be. 50. ppm. by. the. paper. disc.
method..Growth.inhibitions.toward.
A. fumigatus
.and.
B. subtilis
.by.50.and.100.ppm.ZnO.
with.a.volume.of.100.μl.are.also.shown.in.Figures 18.7.and.18.8,.respectively.
After.a.washing.treatment.of.the.green.fabric.according.to.AATCC.135.for.5,.10,.and.30.
times,.the.green.fabric.showed.various.antimicrobial.activities..The.fabric.that.was.washed.
ive.times.showed.the.widest.clear.zone..The.lowest.concentration.for.ZnO.nanoparticles.
to.maintain.the.antimicrobial.activity.using.the.paper.disc.method.was.found.to.be.50.μg/
