Separation and Purification Technology,
Год журнала:
2023,
Номер
328, С. 125016 - 125016
Опубликована: Сен. 4, 2023
Microalgae
harvesting
at
an
industrial
scale
remains
a
techno-economic
bottleneck
for
large-scale
microalgae
production
that
can
account
up
to
30%
of
the
total
cost
biomass
production.
A
wide
range
techniques
have
been
applied
commercially,
among
which,
coagulation-flocculation
prove
be
both
convenient
and
cost-effective
as
pre-treatment
used
in
conjunction
with
other
methods.
In
this
study,
process
wastewater
acquired
from
onshore
natural
gas
facilities
Qatar
was
utilized
cultivate
freshwater
specie
Scenedesmus
sp.
simultaneous
pollution
abatement
applications.
cultivated
two
growth
phases
(fast
slow
phases)
examine
influence
phase
on
flocculation
rheological
behavior.
Effective
achieved
using
commercial
high
charge
density
molecular
weight
cationic
polyacrylamide-based
flocculant.
Flocculation
efficiencies
exceeded
97%
fast
suspensions
optimum
flocculant
dose
10
mg/L.
Optimum
conditions
were
well
corroborated
by
residual
turbidity
zeta
potential
measurements.
For
suspensions,
PAM
coincided
minimum
2.35
NTU
−0.52
mV.
Similarly,
fixed
based
2.30
+0.63
mV
suspensions.
Large,
easily
settleable
compact
flocs
obtained
average
D50
values
70.7
μm
142.0
recorded
respectively,
dose.
Moreover,
characterization
studies,
flocculated
demonstrated
overall
non-Newtonian
pseudoplastic
(shear
thinning)
fluid
Introduction
significantly
improved
viscosity
yield
stress
around
range.
At
dose,
initial
viscosities
10.37
39.19
mPa.s
stresses
12.84
16.59
N/m2
respectively.
The
further
displayed
viscoelastic
solid
(gel)
behavior,
characterized
gel
strength
resistance
shearing
doses.
storage
moduli
886.2
1068.6
mPa
Plants,
Год журнала:
2025,
Номер
14(5), С. 766 - 766
Опубликована: Март 2, 2025
Phenolic
compounds
are
strong
antioxidant
and
antibacterial
agents
with
great
pharmacological,
medicinal,
nutritional,
industrial
value.
The
potential
of
Morus
nigra
in
stem
node
culture
was
investigated
for
the
production
phenolic
their
elicitation
CuSO4.
Individual
samples
were
identified
quantified
by
using
HPLC-PDA
HPLC-MS
methods,
while
content
total
compounds,
flavonoids,
activity
methanolic
extracts
evaluated
spectrophotometrically.
highest
fresh
dry
weights
obtained
plantlets
treated
0.5
mM
CuSO4
42
days.
content,
flavonoid
determined
cultures
3
Under
latter
conditions,
predominant
representatives
caffeoylquinic
acids,
p-coumaric
acid
derivatives,
kaempferol
quercetin
derivatives
also
achieved
content.
most
abundant
compound
all
chlorogenic
acid.
nodal
M.
elicited
could
potentially
be
used
especially
acids.
Moreover,
considering
biochemical
response
to
treatment
ability
tolerate
accumulate
copper,
application
phytoremediation
is
highlighted.
Bioresource Technology,
Год журнала:
2023,
Номер
379, С. 129057 - 129057
Опубликована: Апрель 13, 2023
This
paper
demonstrates
a
sequential
partitioning
method
for
isolating
bioactive
compounds
from
Chrysochromulina
rotalis
using
polarity
gradient,
replacing
classic
and
hazardous
solvents
with
greener
alternatives.
Seventeen
were
evaluated
based
on
their
Hansen
solubility
parameters
having
similar
to
the
they
would
replace,
four
of
which
selected
as
substitutes
in
fractionation
process.
Considering
fatty
acid
carotenoid
recovery
yields
obtained
each
solvents,
it
has
been
proposed
replace
hexane
(HEX),
toluene
(TOL),
dichloromethane
(DCM)
n-butanol
(BUT)
cyclohexane,
chlorobenzene,
isobutyl
acetate
isoamyl
alcohol,
respectively.
In
addition,
cytotoxic
activity
was
observed
when
TOL
DCM
solvent
extracts
tested
against
tumour
cell
lines,
demonstrating
antiproliferative
potential
containing,
example,
fucoxanthin,
acids,
peptides,
isoflavonoids
or
terpenes,
among
others.
Metabolites,
Год журнала:
2023,
Номер
13(2), С. 202 - 202
Опубликована: Янв. 30, 2023
Natural
products
from
the
marine
environment
as
well
microalgae,
have
been
known
for
complexity
of
metabolites
they
produce
due
to
their
adaptability
different
environmental
conditions,
which
has
an
inexhaustible
source
several
bioactive
properties,
such
antioxidant,
anti-tumor,
and
antimicrobial.
This
study
aims
characterize
main
three
species
microalgae
(Nannochloropsis
oceanica,
Chaetoceros
muelleri,
Conticribra
weissflogii),
important
applications
in
biofuel
nutrition
industries,
by
1H
High-resolution
magic
angle
spinning
nuclear
magnetic
resonance
(1H
HR-MAS
NMR),
a
method
is
non-destructive,
highly
reproducible,
requires
minimal
sample
preparation.
Even
though
were
found
same
ecosystem
superior
production
lipid
compounds
was
observed,
differences
identified
relation
specialized
metabolites.
These
distinct
properties
favor
use
these
leaders
development
new
compounds,
especially
against
environmental,
human,
animal
pathogens
(One
Health),
demonstrate
potential
alternatives
aquaculture.
