Journal of Biomedical Nanotechnology,
Journal Year:
2024,
Volume and Issue:
20(11), P. 1736 - 1746
Published: Nov. 1, 2024
Silver
nanoparticles
(AgNPs)
stand
out
in
nanotechnology
for
their
diverse
properties
as
a
pioneering
field.
The
purpose
of
the
study
was
to
synthesize
AgNPs
using
new
approaches
by
Juniperus
procera
(
J.
)
and
Azadirachta
indica
A.
stem
extracts
synthesis
optimized
modifying
factors
including
pH,
concentration
extract,
temperature,
intensity
light.
Extract
with
1
mL
exposed
sunlight
led
enhanced
synthesis.
By
UV-VIS
spectroscopy,
furrier
transform
infrared
spectrometry,
field
emission
scan
microscopy
we
identified
functional
groups.
Also,
found
that
both
had
small
sizes,
27
nm,
67
respectively.
Further,
these
bioAgNPs
first
attempts
were
highly
cytotoxic
towards
A549,
HCT116,
MCF7
cancer
cells,
suggesting
they
may
prove
be
potent
therapies
future.
Entomological Research,
Journal Year:
2024,
Volume and Issue:
54(11)
Published: Nov. 1, 2024
Abstract
The
fall
armyworm,
Spodoptera
frugiperda
(J.
E.
Smith),
is
a
destructive
pest
of
Zea
mays
(maize)
and
other
agricultural
crops.
synthetic
insecticides
predominantly
used
against
this
lead
to
resistance,
environmental
contamination
health
hazards.
This
study
evaluated
nanoformulated
aqueous
extracts
some
promising
local
plant
species
third
instar
larvae
S.
under
laboratory
field
conditions.
initial
screening
bioassay
showed
highest
larval
mortality
with
20%
extract
Nicotiana
tabacum
L.
(66.67%),
followed
by
Azadirachta
indica
A.
Juss.
(53.33%),
Withania
somnifera
(46.67%),
Melia
azedarach
(40%)
Dodonaea
viscosa
Jacq.
(33.33%).
two
most
effective
(
N.
)
were
further
silver
nitrate
(AgNO
3
bioassayed
using
different
concentrations.
results
that
these
caused
significant
mortality,
LC
50
(lethal
concentration
kills
50%
the
population)
LT
time
kill
values
37.36
28.21%
at
72
h,
52.19
33.25
h
80%
concentration,
respectively.
Field
experiments
on
plants
maximum
reduction
(48%),
(36%),
whereas
was
noted
for
positive
(SuperLock®,
emamectin
benzoate
tebufenozide)
negative
(water)
controls,
Furthermore,
characterization
both
nanoparticles‐based
formulations
performed
ultraviolet–visible
(UV–vis)
spectroscopy,
Raman
spectroscopy
scanning
electron
microscopy
(SEM)
techniques,
which
confirmed
formation
nanoparticles.
It
concluded
can
be
an
alternative
pesticides
in
combatting
lepidopteran
pests.
