Abstract.
The
interactions
of
metabolically
active
atmospheric
microorganisms
with
cloud
organic
matter
can
alter
the
carbon
cycle.
Upon
deposition,
influence
microbial
communities
in
surface
Earth
systems.
However,
metabolic
activities
cultivable
settled
habitats
remain
less
understood.
Here,
we
investigated
exometabolites
produced
by
typical
bacterial
and
fungal
species
isolated
from
urban
atmosphere
to
elucidate
their
biogeochemical
roles.
Molecular
compositions
were
analyzed
using
ultra-high
resolution
Fourier
transform
ion
cyclotron
resonance
mass
spectrometry.
Annotation
through
Kyoto
Encyclopedia
Genes
Genomes
database
helped
identify
processes.
Results
showed
that
strains
produce
lower
H/C
higher
O/C
ratios
than
consumed
resistant
compounds.
CHON
compounds
constituted
over
50
%
identified
formulas
exometabolites.
Bacterial
contained
more
abundant
CHONS
(25.2
%),
while
rich
CHO
(31.7
%).
These
predominantly
comprised
aliphatic/peptide-like
carboxyl-rich
alicyclic
molecules
(CRAM-like).
Significant
variations
metabolites
observed
among
different
strains.
Bacteria
a
performance
for
amino
acid
synthesis,
fungi
transcription
expression
Lipid
metabolism,
carbohydrate
metabolism
varied
widely
strains,
exhibited
marked
differences
secondary
metabolism.
This
comprehensive
examination
metabolite
characteristics
at
molecular
level
culturable
airborne
enhances
our
understanding
potential
air-land/water
interfaces.
insights
are
pivotal
assessing
impacts
following
deposition.
Case Studies in Chemical and Environmental Engineering,
Год журнала:
2023,
Номер
8, С. 100432 - 100432
Опубликована: Июль 29, 2023
This
study
aimed
to
optimize
the
process
parameters
and
evaluated
economic
feasibility
for
biodiesel
production.
A
pyrolytic
rice
straw
ash
(RSA)
support
with
various
amounts
of
calcium
oxide
(25–35
wt%)
calcination
temperatures
(600–800
°C)
were
used
in
study.
The
results
identified
35
wt%
CaO/RSA
at
600
°C
as
most
effective
catalyst
turnover
frequency
(TOF)
2.88
h−1
synthesis,
giving
a
yield
96.49%.
optimal
conditions
production
included
methanol:
palm
oil
molar
ratio
9.34:1,
loading
4.87
wt%,
175
min
reaction
time,
65
temperature.
also
techno-economic
analysis
production,
revealing
payback
period
7.17
years,
an
internal
rate
return
17.20%,
net
present
value
4,151,905.61
USD.
These
findings
pave
way
more
sustainable
economically
feasible
Catalysts,
Год журнала:
2023,
Номер
13(4), С. 687 - 687
Опубликована: Март 31, 2023
Pure
water,
i.e.,
a
sign
of
life,
continuously
circulates
and
is
contaminated
by
different
discharges.
This
emerging
environmental
problem
has
been
attracting
the
attention
scientists
searching
for
methods
treatment
wastewater
multiple
recalcitrant
compounds.
Various
physical
chemical
are
used
to
degrade
contaminants
from
water
bodies.
Traditional
have
certain
limitations
complexities
bioenergy
production,
which
motivates
search
new
ways
sustainable
production
treatment.
Biological
strategies
opened
avenues
using
oxidoreductase
enzymes
degradation
pollutants.
Fungal-based
fuel
cells
(FFCs),
with
their
catalysts,
gained
considerable
among
worldwide.
They
new,
ecofriendly,
alternative
approach
nonchemical
due
easy
handling.
FFCs
efficiently
in
electricity
power
generation.
article
also
highlights
construction
fungal
catalytic
enzymatic
performance
species
energy
wastewater.
Fermentation,
Год журнала:
2024,
Номер
10(4), С. 219 - 219
Опубликована: Апрель 17, 2024
Nejayote,
the
wastewater
from
nixtamalization
of
maize,
is
difficult
to
biodegrade
due
its
abundant
calcium
content;
low
levels
nitrogen,
phosphorus,
and
easily
assimilable
sugars;
elevated
pH;
high
chemical
oxygen
demand
(COD).
The
aim
present
study
was
isolate
microorganisms
capable
utilizing
filtered
nejayote
(NEM)
as
only
source
carbon
for
growth
test
best
microorganism
bioremediation
this
by
lowering
level
pH
COD.
Of
15
strains
tested,
Rhodotorula
mucilaginosa
LCRE
chosen
identified
using
molecular
techniques.
Subsequently,
kinetics
were
characterized
during
cultivation
in
unenriched
NEM
(control)
enriched
with
nitrogen
phosphorus
salts.
R.
showed
a
greater
(6.9
≤
X
8.9
g
L−1),
biomass
yield
(0.33
YX/S
0.39
g−1),
specific
rate
(0.748
µ
0.80
day−1)
versus
control
(X
=
6.55
L−1,
0.28
g−1,
0.59
day−1).
However,
higher
total
sugar
consumption
(94.98%),
better
COD
removal
efficiency
(75.5%),
overall
(1.73
L−1
h−1)
found
NEM.
Hence,
holds
promise
efficient
without
costly
pretreatments
or
nutrient
supplementation.
