Jurnal Bahan Alam Terbarukan,
Год журнала:
2023,
Номер
12(2), С. 166 - 173
Опубликована: Дек. 31, 2023
Green
synthesis
of
silver
nanoparticles
using
plants
has
been
interesting
in
recent
years.
In
the
present
study,
were
synthesized
a
bioreductor
from
ketapang
leaf
extract
(Terminalia
catappa
L.)
assisted
by
sonochemical
methods.
This
green
provides
an
economic,
eco-friendly,
and
clean
route
for
nanoparticles.
Different
concentrations
AgNO3
precursors
(0.5;
1.0
1.5
mM)
initially
reacted
with
PVA
1%
solution
as
stabilizers
that
sonicated
30
minutes.
Silver
nanoparticle
colloidal
solutions
characterized
UV-Vis
spectrophotometers,
Particle
Size
Analyzers
(PSA),
Transmission
Electron
Microscopes
(TEM).
Maximum
absorption
was
obtained
at
wavelength
420-450
nm.
Based
on
UV
data,
showed
stability
up
to
3
weeks.
The
XRD
peaks
indicated
(111)
crystallographic
plane
more
predominant
than
other
planes.
average
size
79.7
nm
PSA
result.
TEM
imaging
depicted
spherical.
Finally,
result
proved
effectively
removed
methylene
blue
76.43%
within
optimum
conditions
(3
ppm
blue,
15
minutes
contact
time,
8%
concentration).
Applied Sciences,
Год журнала:
2024,
Номер
14(2), С. 582 - 582
Опубликована: Янв. 9, 2024
In
this
paper,
a
viability
study
is
conducted
for
bioremediation
intervention
in
cultivated
area
contaminated
by
pipeline
oil
spill.
context,
green
technologies
such
as
and
phytoremediation
could
represent
an
optimal
solution
reducing
pollution
without
deteriorating
soil
quality.
The
test
was
at
the
microcosm
scale
using
three
plant
species
(Zea
mays,
Lupinus
albus
Medicago
sativa)
mesocosm
mays),
also
evaluating
application
of
growth-promoting
bacteria
(PGPB).
results
showed
that
selected
plants,
being
able
to
grow
satisfactorily,
are
lessen
presence
hydrocarbons
soil.
An
increase
15–18%
degradation
C
>
12
fractions
vegetated
soils
observed,
confirming
effect
plants
on
biodegradation
Moreover,
further
improvement
recorded
after
adding
PGPB,
resulting
fresh
biomass
production
up
50%
higher
than
controls
fraction
increasing
additional
10%.
Particular
attention
paid
pyrene,
considered
indicator
PAH
contamination.
At
end
experimentation
soils,
pyrene
removal
reached
values
above
50%.
By
favoring
growth,
addition
PGPB
resulted
20%
reduction
content
contaminant
primary
role
petroleum
derivatives
accelerate
contaminants
through
stimulation
microbial
activity.
Therefore,
cooperation
between
microorganisms
can
be
concretely
used
nature-based
sustainable
economical
way.
BioMolecular Concepts,
Год журнала:
2024,
Номер
15(1)
Опубликована: Янв. 1, 2024
Abstract
Bisphenol
A
(BPA)
and
p
-nitrophenol
(PNP)
are
emerging
contaminants
of
soils
due
to
their
wide
presence
in
agricultural
industrial
products.
Thus,
the
present
study
aimed
integrate
morpho-physiological,
ionic
homeostasis,
defense-
antioxidant-related
genes
response
tomato
plants
BPA
or
PNP
stress,
an
area
research
that
has
been
scarcely
studied.
In
this
work,
increasing
levels
soil
intensified
drastic
effects
on
biomass
photosynthetic
pigments
plants.
Moreover,
induced
osmotic
stress
by
reducing
soluble
sugars
proteins
relative
control.
The
contamination
with
treatments
caused
a
decline
macro-
micro-elements
foliar
tissues
tomatoes
while
simultaneously
contents
non-essential
micronutrients.
Fourier
transform
infrared
analysis
active
components
leaves
revealed
influenced
certain
functional
groups,
resulting
absence
some
treatment,
there
was
shift
observed
groups
compared
At
molecular
level,
increase
gene
expression
polyphenol
oxidase
peroxidase,
exception
POD
under
stress.
thaumatin-like
protein
increased
at
highest
level
moderate
without
any
significant
effect
both
pollutants
tubulin
(TUB)
gene.
comprehensive
biochemical
responses
subjected
illustrates
valuable
insights
into
mechanisms
underlying
tolerance
these
pollutants.
International Journal of Molecular Sciences,
Год журнала:
2025,
Номер
26(4), С. 1713 - 1713
Опубликована: Фев. 17, 2025
Alkane-oxidizing
bacteria
play
a
crucial
role
in
the
global
carbon
cycle.
Rhodococcus
species
are
well-known
hydrocarbon
degraders,
distinguished
by
harboring
of
multiple
homologs
AlkB
family
alkane
monooxygenases.
Although
different
types
rhodococcal
AlkBs
have
been
described,
overall
picture
their
diversity
remains
unclear,
leaving
gaps
current
classification.
We
conducted
phylogenetic
analysis
all
identified
(sensu
lato)
and
examined
genomic
context
corresponding
genes.
The
sequence
clustering
was
well
aligned
with
neighborhoods,
allowing
both
features
to
be
used
as
criteria
for
proposing
that
form
distinct
groups
characteristic
contexts.
Our
approach
allowed
us
revise
classification
previously
described
AlkBs,
identifying
eight
on
basis,
propose
three
new
ones.
Alkane
monooxygenases
whose
genes
co-localized
rubredoxin
can
considered
generalized
AlkBR
type,
most
common
among
Rhodococcus.
In
AlkB0
which
is
paralog
AlkBR,
violations
conservativity
known
monooxygenase
signature
motifs
were
found.
findings
provide
more
consistent
framework
prevents
over-reporting
"novel"
contributes
deeper
understanding
diversity.
