Molecules,
Journal Year:
2021,
Volume and Issue:
26(19), P. 6013 - 6013
Published: Oct. 3, 2021
This
study
investigated
the
effect
of
chitosan
particle
sizes
on
properties
carboxymethyl
(CMCh)
powders
and
films.
Chitosan
with
different
(75,
125,
250,
450
850
µm)
were
used
to
synthesize
CMCh
powders.
The
yield,
degree
substitution
(DS),
water
solubility
then
determined.
films
prepared
based
fabricated
by
a
solution
casting
technique.
solubility,
mechanical
properties,
vapor
transmission
rate
(WVTR)
measured.
As
size
decreased,
DS,
synthesized
increased.
increase
in
was
due
an
polarity
powder,
from
higher
conversion
into
CMCh.
In
addition,
also
related
surface
area
reaction
provided
powder
smaller
size.
tensile
strength,
elongation
at
break,
WVTR
demonstrated
that
greater
improvement
can
be
achieved
using
International Journal of Molecular Sciences,
Journal Year:
2020,
Volume and Issue:
21(2), P. 487 - 487
Published: Jan. 12, 2020
Chitosan
is
a
product
of
the
deacetylation
chitin,
which
widely
found
in
nature.
insoluble
water
and
most
organic
solvents,
seriously
limits
both
its
application
scope
applicable
fields.
However,
chitosan
contains
active
functional
groups
that
are
liable
to
chemical
reactions;
thus,
derivatives
can
be
obtained
through
modification
chitosan.
The
has
been
an
important
aspect
research,
showing
better
solubility,
pH-sensitive
targeting,
increased
number
delivery
systems,
etc.
This
review
summarizes
by
acylation,
carboxylation,
alkylation,
quaternization
order
improve
pH
sensitivity,
targeting
derivatives.
applications
antibacterial,
sustained
slowly
release,
system
fields
also
described.
will
have
large
impact
show
potential
biomedicine
for
development
drugs
future.
Chemical Reviews,
Journal Year:
2021,
Volume and Issue:
121(22), P. 14088 - 14188
Published: Aug. 20, 2021
This
review
considers
the
most
recent
developments
in
supramolecular
and
supraparticle
structures
obtained
from
natural,
renewable
biopolymers
as
well
their
disassembly
reassembly
into
engineered
materials.
We
introduce
main
interactions
that
control
bottom-up
synthesis
top-down
design
at
different
length
scales,
highlighting
promise
of
natural
associated
building
blocks.
The
latter
have
become
actors
surge
scientific
patent
literature
related
to
subject.
Such
make
prominent
use
multicomponent
hierarchical
polymeric
assemblies
contain
polysaccharides
(cellulose,
chitin,
others),
polyphenols
(lignins,
tannins),
proteins
(soy,
whey,
silk,
other
proteins).
offer
a
comprehensive
discussion
about
exist
native
architectures
(including
composite
forms),
chemical
modification
deconstruction
high
axial
aspect
nanofibers
nanorods.
reflect
on
availability
suitability
types
blocks
enable
superstructures
colloidal
associations.
As
far
processing,
we
describe
relevant
transitions,
solution
gel
state
routes
can
be
used
arrive
consolidated
materials
with
prescribed
properties.
highlight
implementation
technological
fields
exploit
synergies
exhibited
by
polymers
biocolloids
integrated
structured
Polymers,
Journal Year:
2020,
Volume and Issue:
12(8), P. 1766 - 1766
Published: Aug. 7, 2020
In
this
work,
we
have
developed
a
novel
strategy
to
prepare
hybrid
nanostructures
with
controlled
release
properties
towards
khellin
by
exploiting
the
electrostatic
interactions
between
chitosan
and
halloysite
nanotubes
(HNT).
Firstly,
was
loaded
into
HNT
lumen
vacuum-assisted
procedure.
The
drug
confinement
within
cavity
has
been
proved
water
contact
angle
experiments
on
HNT/khellin
tablets.
Therefore,
were
coated
as
consequence
of
attractions
cationic
biopolymer
outer
surface,
which
is
negatively
charged
in
wide
pH
range.
effect
ionic
strength
aqueous
medium
coating
efficiency
clay
investigated.
surface
charge
chitosan/HNT/khellin
nanomaterials
determined
ζ
potential
experiments,
while
their
morphology
explored
through
Scanning
Electron
Microscopy
(SEM).
Water
conducted
explore
influence
hydrophilic/hydrophobic
character
external
surface.
Thermogravimetry
(TG)
study
thermal
behavior
composite
nanomaterials.
amounts
estimated
quantitative
analysis
TG
curves.
kinetics
studied
solvents
at
different
conditions
(acidic,
neutral
basic)
obtained
data
analyzed
Korsmeyer–Peppas
model.
interpreted
basis
results.
conclusion,
demonstrates
that
wrapped
layers
can
be
effective
delivery
systems.
Fishes,
Journal Year:
2023,
Volume and Issue:
8(7), P. 333 - 333
Published: June 21, 2023
This
study
aimed
to
evaluate
the
effects
of
dietary
supplementation
with
nano-curcumin
(NCur)
and
a
nano-curcumin/chitosan
blend
(NCur/Ch)
on
growth
performance,
digestibility,
immune
response,
antioxidant
status,
intestinal
morphometric
characters,
gene
regulation
in
Nile
tilapia.
Fish
(n
=
180,
initial
body
weight
12.0
±
0.53
g)
received
supplementary
NCur
at
rates
0
(control),
0.00625,
0.0125,
NCur/Ch
0.00625
+
0.5
g/kg
diet
for
4
weeks.
Growth
performance
parameters
(final
length,
mass
gain,
specific
growth,
length
gain
rates)
were
markedly
increased,
feed
conversion
ratio
was
significantly
decreased
NCur-
NCur/Ch-supplemented
groups.
Digestive
enzyme
(amylase),
response
markers
(immunoglobulin
M,
nitrous
oxide,
lysozyme
activity),
plasma
albumin,
total
protein
increased
significantly,
mainly
supplemented
g
NCur/kg.
Aspartate
aminotransferase
(AST),
alanine
(ALT),
glucose,
cortisol
levels
groups
compared
control.
Significantly
glutathione
peroxidase
(GPx)
malondialdehyde
(MDA)
observed
group.
Superoxide
dismutase
(SOD)
activity
improved
0.0125
Intestinal
including
villus
width,
interspace,
goblet
cell
abundance,
cope
associated
upregulation
insulin-like
factor
1
(igf-1)
complement
C-5
(cc5)
control
Therefore,
an
could
be
tilapia
diets
as
natural
alternative
promote
digestion,
liver
function,
related
expression
O.
niloticus.
