Heritage,
Год журнала:
2022,
Номер
5(4), С. 3049 - 3065
Опубликована: Окт. 11, 2022
Melanins
play
a
fundamental
role
in
the
biology
and
ecology
of
several
fungal
species.
Unfortunately,
this
group
amorphous
macromolecules
also
severely
(and
most
times
irreversibly)
stains
cultural
heritage
objects.
Despite
efforts
made
throughout
years,
knowledge
chemical
composition
structure
melanins
is
still
insufficient,
which
hampers
task
safely
cleaning
these
colourants
from
materials
targeted
way
without
causing
further
deterioration.
This
work
aimed
therefore
to
contribute
towards
enlightening
characteristics
three
fungi
that
are
common
paper
colonizers:
Aspergillus
niger,
Chaetomium
globosum
Cladosporium
cladosporioides.
The
extracted
were
characterized
by
FTIR,
Raman,
UV-vis,
Solid-State
NMR
MALDI-TOF
MS
spectroscopies
effect
inhibitors
DHN-melanin
DOPA-melanin
pathways
on
colony
pigmentation
growth
was
evaluated.
Although
all
show
predominantly
aromatic
with
carbonyl
phenolic
groups,
some
differences
between
can
be
highlighted.
obtained
Ch.
Cl.
cladosporioides
exhibited
similar
structures
both
presented
characteristics,
while
A.
niger’s
revealed
more
complex
ordered
structure,
higher
prevalence
highly
conjugated
carbonyls
than
others,
besides
additional
presence
yellow/green
component.
These
conclusions
cannot
overlooked
selecting
methodologies
for
melanin
materials.
Journal of Functional Biomaterials,
Год журнала:
2024,
Номер
15(3), С. 73 - 73
Опубликована: Март 17, 2024
The
cost
of
treatment
antibiotic-resistant
pathogens
is
on
the
level
tens
billions
dollars
at
moment.
It
special
interest
to
reduce
or
solve
this
problem
using
antimicrobial
coatings,
especially
in
hospitals
other
healthcare
facilities.
bacteria
can
transfer
from
medical
staff
contaminated
surfaces
patients.
In
paper,
we
focused
our
attention
antibacterial
and
antibiofouling
activities
two
types
photodynamic
polyurethane
composite
films
doped
with
carbon
polymerized
dots
(CPDs)
fullerene
C60.
Detailed
atomic
force,
electrostatic
force
viscoelastic
microscopy
revealed
topology,
nanoelectrical
nanomechanical
properties
used
fillers
composites.
A
relationship
between
electronic
structure
nanocarbon
composites
was
established.
Thorough
spectroscopic
analysis
reactive
oxygen
species
(ROS)
generation
conducted
for
both
films,
it
found
that
them
were
potent
agents
against
nosocomial
(Klebsiela
pneumoniae,
Proteus
mirabilis,
Salmonela
enterica,
Enterococcus
faecalis,
epidermis
Pseudomonas
aeruginosa).
Antibiofouling
testing
indicated
CPDs/PU
eradicated
almost
completely
biofilms
aeruginosa
Staphylococcus
aureus
about
50%
Escherichia
coli
biofilms.
ACS Sustainable Chemistry & Engineering,
Год журнала:
2024,
Номер
12(19), С. 7466 - 7477
Опубликована: Апрель 23, 2024
The
lithium-ion
battery
market
is
rapidly
expanding
but
lacks
recycling
for
spent
(SLIB)
cathodes,
overlooking
their
potential
as
valuable
raw
materials.
Herein,
we
present
a
novel
win–win
bioregulation
strategy
to
repurpose
SLIB
cathodes
into
dual-functional
biocatalysts
oxygen
and
hydrogen
evolution
reactions
(OER
HER)
using
Aspergillus
niger
soluble
extracellular
polymers.
In
the
recycled
cathode
ink,
85%
of
cobalt
has
been
regenerated
catalysts.
Simultaneously,
materials
such
graphite
cobalt,
which
have
not
regenerated,
are
separated
stored.
Integrating
characterization
theoretical
calculations
reveals
that
enhances
hydrophilicity
70-Bio-Co/GOs
enables
biological
nitrogen
doping.
Compared
catalyst
lacking
bioregulation,
observe
0.27
eV
elevation
in
d-band
center
identify
metallic-like
electron
distribution
around
Fermi
level.
Consequently,
compared
with
other
studies,
70-Bio-Co/GO
exhibits
slight
superiority
OER
(η10
251
mV),
HER
110
overall
water
splitting
(25
mA
cm–2
1.641
V)
performance,
along
stability
(98
h).
Overall,
investigated
technology
regenerating
SLIBs.
