Journal of Pharmacy And Bioallied Sciences,
Год журнала:
2024,
Номер
16(Suppl 2), С. S1256 - S1262
Опубликована: Апрель 1, 2024
A
BSTRACT
Nonessential
heavy
metals
are
toxic
to
human
health.
In
this
study,
mercury,
a
hazardous
metal,
was
detected
by
colorimetric
analysis
using
Murraya
koenigii
.
The
eco-friendliness
of
method
also
emphasized.
UV
spectrum
is
broad
peak
observed
at
200–250
nm
in
P.
guajava
leaf
extracts.
green
synthesized
exhibited
an
absorption
band
418
nm,
which
confirms
the
nanoparticle
synthesis.
FTIR
vibrational
around
3307
cm−1
assigned
ν(O–H)
stretching
that
could
possibly
emanate
from
carbohydrates
or
phenolics.
peaks
found
2917
and
2849
ascribed
–C-H
stretch
alkyl
group,
1625
due
enolic
β-diketones
-C
=
O
carboxylic
acids,
while
corresponding
-C-O
1375
1029
cm−1.
assignment
similar.
It
clear
SEM
image
constituent
parts
were
non-uniform
sphere-shaped,
agglomerated,
average
size
30.9
nm.
XRD
utilized
determine
structural
characteristics
crystalline
nature
guajava.
intensity
32.35°,
36.69°,
39.24°,
44.76°,
59.42°,
67.35°
represent
2θ
values
for
diffraction
pattern,
aligning
with
standard
database.
AgNPs
tested
antibacterial
properties
against
various
strains
microorganisms,
including
Escherichia
coli
,
25
μg/mL
6.02
±
0.17
100
7.3
0.05,
Staphylococcus
aureus
05.02
0.07
11.3
1.12,
Streptococcus
mutans
04.02
0.19
11.1
0.11,
Enterococcus
faecalis
µg/mL
0.8.05
0.11
11.7
0.02.
short
novelty
Psidium
(guava)
lies
its
potential
relevance
health,
as
it
has
been
possess
bioactive
compounds
medicinal
properties,
such
antimicrobial,
antioxidant,
anti-inflammatory
activities,
making
promising
natural
resource
therapeutic
applications.
Nanomaterials,
Год журнала:
2025,
Номер
15(3), С. 230 - 230
Опубликована: Янв. 31, 2025
This
study
investigated
the
influence
of
chemical
reagent
selection
on
properties
ZnO
nanoparticles
synthesized
using
microwave-assisted
hydrothermal
method
to
control
intensities
near-band-edge
(NBE)
and
defect-related
deep-level
(DLE)
emissions.
Two
zinc
precursors-zinc
nitrate
chloride-along
with
three
different
precipitating
agents
(NaOH,
KOH,
NH4OH)
were
used.
from
ZnCl2
precursor
exhibited
two
orders
magnitude
higher
NBE/DLE
intensity
ratio
compared
those
obtained
characterized
by
a
contribution
Chlorine
ions
in
play
key
role
passivating
defects
forming
V0-Cl2
complexes,
quenching
luminescence
associated
oxygen
vacancies
(V0).
Thermal
treatment
nitrogen
atmosphere
enhanced
luminescence,
possibly
due
chlorine
atom
diffusion.
highlights
successful
synthesis
low
achieved
via
method,
result
rarely
reported
literature.
The
results
emphasize
importance
controlling
morphology
optical
properties,
especially
defect
density
nanoparticles.
Optimizing
these
is
crucial
for
biomedical
applications
such
as
bioimaging,
antibacterial
treatments,
photocatalysis.
Scientific Reports,
Год журнала:
2025,
Номер
15(1)
Опубликована: Фев. 24, 2025
The
preparation
of
metallic
nanoparticles
(NPs)
using
the
green
method
is
rapid,
eco-friendly,
and
easily
scaled
up
at
room
temperature
pressure.
In
current
study,
zinc
oxide
(ZnO
NPs)
were
prepared
utilizing
leaf
extract
from
Mallotus
philippinensis,
employing
two
distinct
precursors
oxide:
acetate
nitrate.
antioxidant
antibacterial
properties
synthesized
also
evaluated.
synthesis
ZnO
NPs
was
preliminary
monitored
by
UV–visible
analysis.
biosynthesized
further
characterized
a
variety
techniques,
such
as
Fourier
transform
infrared
spectroscopy
(FTIR),
X-ray
diffraction
(XRD),
transmission
electron
microscopy
(TEM),
ultraviolet-visible
(UV-Vis)
spectroscopy.
XRD
peaks
showed
that
both
exhibit
crystalline
properties,
having
wurtzite
hexagonal
shapes.
TEM
analysis
indicates
average
crystallite
size
determined
to
be
21
nm
28
for
nitrate
precursor.
FTIR
confirmed
presence
polyphenolic
compounds
on
surface
nanoparticles,
which
likely
acted
reducing
capping
agents
during
NP
synthesis.
activity
M.
philippinensis-mediated
assessed
in
vitro.
exhibited
higher
potential
(IC50
=
65.31
µg/ml)
compared
those
66.87
µg/ml).
Furthermore,
demonstrated
significant
against
gram-positive
gram-negative
bacteria,
including
Klebsiella
pneumoniae
(K.
pneumoniae),
Staphylococcus
aureus
(S.
aureus),
Escherichia
coli
(E.
coli),
Streptococcus
pneumoniae).
highest
observed
S.
pneumoniae,
with
zone
inhibition
14.97
±
0.38
mm
These
findings
suggest
philippinensis
an
effective
agent
biosynthesis
NPs.
resulting
potent
highlighting
their
applications
biomedical
environmental
fields.
Bioresources and Bioprocessing,
Год журнала:
2025,
Номер
12(1)
Опубликована: Апрель 12, 2025
The
biosynthesis
of
bimetallic
nanoparticles
using
plant
extracts
has
garnered
significant
attention
due
to
their
eco-friendly
and
cost-effective
nature.
This
study
aimed
biosynthesize
magnesium
oxide-zinc
oxide
nanocomposite
(MgO-ZnO
nanocomposite)
Pluchea
indica
leaf
extract
for
the
first
time,
with
a
focus
on
characterizing
its
physicochemical
properties
evaluating
biological
activities.
biosynthesized
MgO-ZnO
was
fully
characterized,
revealing
an
absorbance
peak
at
300
nm
UV-vis
spectroscopy.
Transmission
electron
microscopy
(TEM)
confirmed
particle
stability
within
size
range
5-35
nm.
Cytotoxicity
analysis
Wi
38
normal
cell
line
demonstrated
IC50
value
179.13
µg/mL,
indicating
good
biosafety.
exhibited
potent
anticancer
activity,
values
73.61
µg/mL
31.25
against
Hep-G2
MCF-7
cancer
lines,
respectively.
Antibacterial
assays
revealed
activity
Klebsiella
pneumoniae,
Escherichia
coli,
Bacillus
cereus,
Staphylococcus
aureus,
Candida
albicans,
minimum
inhibitory
concentrations
(MICs)
ranging
from
250
µg/mL.
Furthermore,
displayed
antioxidant
175
as
determined
by
DPPH
assay.
In
conclusion,
successful
synthesis
P.
demonstrates
potential
safe
effective
agent
concentration-dependent
antioxidants,
antibacterial,
applications.
highlights
versatility
plant-mediated
in
developing
functional
nanomaterials
biomedical
use.
Nanomaterials,
Год журнала:
2024,
Номер
14(14), С. 1182 - 1182
Опубликована: Июль 11, 2024
This
review
focuses
on
the
synthesis
of
plant-mediated
zinc
oxide
nanoparticles
(ZnO
NPs)
and
their
applications
for
antibacterial
photocatalytic
degradation
dyes,
thereby
addressing
need
sustainable
eco-friendly
methods
preparation
NPs.
Driven
by
significant
rise
in
antibiotic
resistance
environmental
pollution
from
dye
pollution,
there
is
a
more
effective
agents
photocatalysts.
Therefore,
this
explores
ZnO
NPs,
influence
reaction
parameters
such
as
pH,
annealing
temperature,
plant
extract
concentration,
etc.
Additionally,
it
also
looks
at
application
NPs
photodegradation
focusing
properties
size,
shape,
bandgap
activity.
The
findings
suggest
that
shape
size
are
influenced
these
activity
concludes
have
potential
to
advance
green
materials
photocatalysis
applications.
Pathogens and Global Health,
Год журнала:
2023,
Номер
118(3), С. 209 - 231
Опубликована: Ноя. 25, 2023
Staphylococcus
aureus
is
a
Gram-positive
bacterium
and
one
of
the
most
prevalent
infectious
disease-related
causes
morbidity
mortality
in
adults.
This
pathogen
can
trigger
broad
spectrum
diseases,
from
sepsis
pneumonia
to
severe
skin
infections
that
be
fatal.
In
this
review,
we
will
provide
an
overview
S.
discuss
extensive
literature
on
epidemiology,
transmission,
genetic
diversity,
evolution
antibiotic
resistance
strains,
particularly
methicillin
resistant
(MRSA).
While
many
different
virulence
factors
produces
have
been
investigated
as
therapeutic
targets,
review
examines
recent
nanotechnology
approaches,
which
employ
materials
with
atomic
or
molecular
dimensions
are
being
used
diagnose,
treat,
eliminate
activity
aureus.
Finally,
having
deeper
understanding
clearer
grasp
roles
contributions
determinants,
resistance,
aid
us
developing
anti-virulence
strategies
combat
growing
scarcity
effective
antibiotics
against
