Secondary
organic
aerosol
(SOA)
exerts
a
considerable
influence
on
atmospheric
chemistry.
However,
little
information
about
the
vertical
distribution
of
SOA
in
alpine
setting
is
available,
which
limited
simulation
using
chemical
transport
models.
Here,
total
15
biogenic
and
anthropogenic
tracers
were
measured
PM2.5
aerosols
at
both
summit
(1840
m
a.s.l.)
foot
(480
Mt.
Huang
during
winter
2020
to
explore
their
formation
mechanism.
Most
determined
species
(e.g.,
BSOA
ASOA
tracers,
carbonaceous
components,
major
inorganic
ions)
gaseous
pollutants
presented
higher
concentrations
than
those
summit,
suggesting
relatively
more
significant
effect
emissions
ground
level.
The
ISORROPIA-II
model
showed
that
acidity
increases
as
altitude
decreases.
Air
mass
trajectories,
potential
source
contribution
function
(PSCF),
correlation
analysis
with
temperature
revealed
was
mostly
derived
from
local
oxidation
volatile
compounds
(VOCs),
while
mainly
influenced
by
long-distance
transport.
robust
correlations
NH3,
NO2,
SO2)
indicated
could
promote
productions
mountainous
background
atmosphere.
Moreover,
most
correlated
well
levoglucosan
all
samples,
biomass
burning
played
an
important
role
mountain
troposphere.
This
work
demonstrated
daytime
significantly
valley
breeze
winter.
Our
results
provide
new
insights
into
distributions
provenance
free
troposphere
over
East
China.
The
interaction
of
NO2
with
organic
interfaces
is
critical
in
the
development
sensing
and
trapping
technologies,
equally
so
to
atmospheric
processing
marine
continental
aerosol.
Recent
studies
point
importance
surface
oxygen
groups
these
systems,
however
role
specific
functional
on
microscopic
level
has
yet
be
fully
established.
In
present
study,
we
aim
provide
fundamental
information
behavior
at
atmospherically
relevant
that
may
also
help
inform
innovation
development.
We
then
an
investigation
into
structural
changes
induced
by
propylene
carbonate
(PC),
environmentally
ester.
Surface-sensitive
spectra
PC
liquid
are
acquired
before,
during,
after
exposure
using
infrared
reflection-absorption
spectroscopy
(IRRAS).
Spectra
reveal
preferentially
interacts
carbonyl
interface,
forming
a
distribution
binding
symmetries.
At
low
ppm
levels,
saturates
within
10
minutes
perturbations
constant
over
time
during
flow
NO2.
Upon
removal
flow,
under
pressures,
interactions
reversible,
structure
recovers
completely
30
min.
Another
ester-containing
molecule,
diethyl
sebacate
(DES),
was
investigated
same
carbonyl-specific
intermittently
observed.
Jurnal Farmasi Sains dan Praktis,
Journal Year:
2024,
Volume and Issue:
unknown, P. 12 - 24
Published: Jan. 20, 2024
The
study
of
the
efficacy
Acmella
oleracea
(L.)
flowers
on
breast
cancer
is
still
in
its
early
stages.
molecular
interaction
mechanisms
underlying
oleracea's
anti-breast
activity
will
be
elucidated
using
in-silico
analysis.
For
this
study,
seventeen
bioactive
compounds
were
used:
spilanthol,
alpha-
and
beta-amyrin
ester,
stigmasterol,
beta-sitosterol,
alpha-1-sitosterol,
3-acetylaleuritic
acid,
scopoletin,
vanillic
trans-ferulic,
(72,9E)-2-oxo-undeca-7,9-dienyl
3-methylbut-2-enoate,
beta-caryophyllene,
beta-pinene,
myrcene,
caryophyllene
oxide,
limone
Canonical
smiles
obtained
from
PubChem
inserted
into
PASS
server
to
determine
biological
activity.
Several
docked
with
protein
targets,
such
as
ESR1,
MAP2K2,
PGR.
We
used
Pyrx
0.8
software
for
anchoring
Discovery
Studio
visualize
complex
binding.
In
terms
Antineoplastic,
apoptosis
agonist,
caspase-3,
caspase-8
stimulant,
ovulation
inhibitor,
steroid
synthesis
TP53
expression
enhancer,
all
tested
positive
anticancer
According
Swiss
ADME
protox
analysis,
have
potential
modulate
cell
growth.
More
research
required
confirm
role
developing
target
cancers.
reveals
that
has
numerous
chemicals
advantageous
therapy
by
inducing
through
MAPK2,
PGR
protein.
Journal of Geophysical Research Atmospheres,
Journal Year:
2024,
Volume and Issue:
129(22)
Published: Nov. 13, 2024
Abstract
The
amplification
effect
of
anthropogenic‐biogenic
interactions
on
secondary
organic
aerosol
(SOA)
formation
remains
debated,
particularly
regarding
the
impact
anthropogenic
emissions
biogenic
SOA
(BSOA)
in
forests
near
megacities.
This
study
concurrently
measured
typical
and
tracers
during
day
night
at
summit
(1,690
m
a.s.l.)
foot
(200
Nanling
mountains,
a
large
subtropical
forest
adjacent
to
Pearl
River
Delta
(PRD)
southern
China.
Results
revealed
unexpectedly
high
concentrations
BSOA
(149.9
±
70.5
ng
−3
109.7
51.2
foot),
surpassing
those
most
other
background
sites
worldwide.
Daytime
tracer
levels
were
consistent
with
nighttime
levels,
whereas
showed
significantly
higher
night.
Nighttime
correlations
between
O₃
suggest
that
stimulate
formation.
Conversely,
negative
correlation
isoprene
derived
(SOA
I
)
indicates
oxidants
may
also
influence
rose
arrival
pollutants
(e.g.,
SO₂
NO₂),
indicating
pollution
amplifies
by
enhancing
acidity
(pH
<
3).
could
be
mitigated
reduction
due
increased
NH₃
relative
humidity
(RH).
Our
findings
provide
valuable
insights
into
vertical
distribution
surrounding
