Journal of Oil Palm Research,
Год журнала:
2023,
Номер
unknown
Опубликована: Ноя. 1, 2023
Bacterial
cellulose-silver
nanoparticles
(BC-AgNPs)
composite
was
prepared
for
a
bacterial
wound
dressing.The
oil
palm
frond
(OPF)
juice
utilised
as
low-cost
raw
material
BC
production.The
AgNPs
were
incorporated
in
the
by
thermal
reduction
of
1
mM
silver
nitrate
their
antibacterial
agent.The
BC-AgNPs
had
dense
nanofibrils
with
an
average
diameter
61.5
±
1.0
nm
shown
field
emission
scanning
electron
microscope
(FESEM)
images.The
crystallinity
index
86.5%
and
face-centred
cubic
geometry
crystal
size
26.5
determined
X-ray
diffraction
analysis
(XRD).The
Ag
content
1.463
mg/100
cm
2
analysed
atomic
absorption
spectrophotometry
(AAS).10.4%
total
released
from
72
hr
measured
inductively
coupled
plasma
mass
spectrometry
(ICP-MS).The
also
demonstrated
excellent
action
against
Staphylococcus
aureus,
giving
29
0.8
mm
inhibition
zone
disk
diffusion
assay.Pure
exhibited
no
cytotoxicity
effect
on
HSF1184
fibroblast
cells
10%-40%
extracts
compatible
cell
growth.The
study
suggests
is
good
dressing.
Biomass Conversion and Biorefinery,
Год журнала:
2024,
Номер
unknown
Опубликована: Окт. 28, 2024
Abstract
In
this
work,
stale
bread
and
waste
apple
pulp
were
used
as
feedstocks
for
the
production
of
bacterial
cellulose
(BC).
A
glucose-rich
solution
was
prepared
from
by
dilute
acid
hydrolysis,
while
an
extract
comprising
fructose
glucose
obtained
pulp,
which
cultivating
Komagataeibacter
xylinus
DSM
2004,
either
sole
or
supplemented
with
Hestrin-Schramm
medium.
Supplementation
significantly
improved
BC
production:
3.38
±
0.09
g/L
2.07
0.22
hydrolysate.
There
no
significant
impact
on
chemical
structure
fiber
diameter,
but
biopolymer
produced
had
slightly
higher
crystallinity
(CI
=
59–69%)
lower
thermal
degradation
temperature
(
T
deg
341–350
℃)
than
that
hydrolysate
55%;
316–320
℃).
Moreover,
supplementation
led
to
preparation
thicker
membranes,
Young’s
modulus,
tension,
deformation
at
break
water
uptake
capacity
permeability
O
2
CO
.
These
results
show
are
suitable
cultivation
conditions
can
be
adjusted
tailoring
biopolymer’s
mechanical
barrier
properties
suit
different
applications.
Carbohydrate Polymer Technologies and Applications,
Год журнала:
2023,
Номер
6, С. 100371 - 100371
Опубликована: Сен. 26, 2023
Self-cooling
material
usually
uses
synthetic
or
employ
harmfull
chemicals.
Nanocellulose
from
bacterial
culture
composited
with
CaCO3
and
ZnO
is
proposed
to
overcome
the
limitation.
Bacterial
nanocellulose
was
prepared
via
kombucha
fermentation.
Obtained
bleached
using
H2O2
remove
impurities.
The
exhibited
a
nanofiber
shape
cellulose
I
crystalline
structure
crystallinity
of
44.3%.
fiber
diameter
approximately
92.51±21.46
nm.
Bleached
had
higher
content
than
unbleached
nanocellulose.
particles
form
randomly
distributed
particles.
composite
decreases
sample
temperature
as
high
3.8°C
3.7°C
for
composites,
respectively.
