ACS Sustainable Resource Management,
Journal Year:
2023,
Volume and Issue:
1(1), P. 165 - 177
Published: Nov. 29, 2023
To
address
the
grand
challenges
of
valorizing
agricultural
biomass
(AB)
residues,
processes
such
as
extraction
phytochemicals
need
to
align
with
principles
green
chemistry
and
sustainability.
In
this
regard,
Natural
Deep
Eutectic
Solvents
(NaDESs)
are
being
utilized
extract
value-added
compounds
from
AB,
thanks
their
biodegradability,
cost-effectiveness,
low
toxicity.
The
objective
research
was
valorize
bell
pepper
AB
residues
(stalks
leaves)
through
glycosylated
flavonoids
antioxidant
activity.
achieve
this,
24
NaDESs
were
designed
based
on
choline
chloride
(ChCl)
various
hydrogen
bond
donors,
including
carboxylic
acids
alcohols.
capacities
for
total
two
model
flavonoids,
quercitrin
(quercetin
3-O-rhamnoside)
(Q3O-R)
cynaroside
(luteolin
7-O-glucoside)
(L7O-G),
systematically
evaluated.
Two
crucial
parameters,
time
(measured
in
seconds)
ultrasonic
amplitude
Watts),
optimized
using
a
central
composite
rotatable
design
(CCRD).
high
content
bioactive
present
demonstrated
by
ChCl/1,6-hexanediol
1:1
molar
ratio
30
wt
%
water
(10.31
±
0.16
mg
quercetin
equivalent/g
dry
AB).
pulse-assisted
NaDES
method
outperformed
results
obtained
conventional
hydroethanolic
extraction.
Therefore,
represent
an
efficient
greener
alternative
organic
solvents
extracting
compounds,
natural
antioxidants,
resilient
lignocellulosic
residues.
Heliyon,
Journal Year:
2023,
Volume and Issue:
9(4), P. e14884 - e14884
Published: April 1, 2023
This
research
combined
ultrasonic-assisted
extraction
(UAE)
and
natural
deep
eutectic
solvent
(NADES)
to
recover
phenolic
flavonoid
components
from
mangosteen
rind.
The
antioxidant
activities
were
determined
using
DPPH,
ABTS+,
hydroxyl
assays.
NADES
prepared
lactic
1,2-propanediol
had
the
highest
efficiency
based
on
total
content
(TFC)
contents
(TPC).
Single-factor
experiments
employed
assess
influence
of
UAE
conditions
(liquid-to-solid
ratio,
temperature,
water
in
NADES,
time)
TFC,
TPC,
activities.
NADES-based
optimized
response
surface
methodology
with
Box-Behnken
design
model
five
dependent
responses
(TPC,
ABTS,
OH).
optimal
for
lactic-1,2-Propanediol-based
process
76.7
ml
liquid/g
solid
30.3%
at
57.5
°C
9.1
min.
Scanning
electron
microscopy
(SEM)
was
applied
examine
morphology
rind
before
after
sonication.
study
proposes
an
efficient,
green,
practical
approach
recovering
phenolics
flavonoids
rinds.
ACS Omega,
Journal Year:
2023,
Volume and Issue:
8(37), P. 33870 - 33882
Published: Aug. 29, 2023
This
study
optimized
the
ultrasonic-assisted
extraction
(UAE)
and
microwave-assisted
(MAE)
processes
to
acquire
phenolics
flavonoids
from
passion
fruit
peels
using
a
mixture
of
ethanol,
acetone,
water.
An
augmented
simplex-centroid
design
was
employed
find
suitable
volume
ratio
among
solvent
ingredients
attain
highest
yield
flavonoids.
One-factor
experiments
were
conducted
investigate
influence
UAE
MAE
parameters
on
recovery
before
two
Box-Behnken
Design
(BBD)
models.
The
optimal
conditions
for
recovering
peel
powder
(PFP)
28
mL/g
liquid-to-solid
(LSR),
608
W
ultrasonic
power,
63
°C
20
min
total
phenolic
content
(TPC)
flavonoid
(TFC)
at
39.38
mg
gallic
acid
equivalents
per
gram
dried
basis
(mg
GAE/g
db)
25.79
rutin
RE/g
db),
respectively.
attaining
PFP
26
LSR
606
microwave
power
2
recover
TPC
TFC
17.74
db
8.11
db,
second-order
kinetic
model
determine
mechanism
thermodynamic
processes.
antioxidant
activities
extracts
examined
compare
efficiency
MAE.
establishes
an
effective
approach
obtaining
peels.
BMC Chemistry,
Journal Year:
2023,
Volume and Issue:
17(1)
Published: Sept. 21, 2023
Abstract
This
study
deployed
ultrasonic-assisted
extraction
(UAE),
combined
with
natural
deep
eutectic
solvents
(NADES),
to
extract
phenolics
and
flavonoids
from
the
black
mulberry
fruit,
antioxidant
activity
was
examined.
The
yields
of
NADES-based
UAE
were
assessed
based
on
extracted
fruit.
selected
molar
ratios
hydrogen
bond
acceptors
(HBA)
donors
HBD
at
1:2
previous
studies.
Choline
chloride-lactic
acid
showed
highest
solubility
among
NADES
systems.
One-factor
experiments
evaluated
effect
conditions
(liquid-to-solid
ratio
(LSR),
water
content
in
NADES,
temperature,
time)
TPC,
TFC,
activity.
suitable
for
extracting
fruit
60
ml/g
LSR,
40%
content,
70
°C,
15
min.
Response
surface
methodology
Box-Behnken
design
model
optimized
process
response
(TPC,
ABTS,
OH,
DPPH).
optimal
38.9%
67.9
24.2
min
time.
predicted
values
compatible
experimental
results.
Moreover,
scanning
electron
microscopy
(SEM)
used
survey
without
sonication.
SEM
can
assist
demonstrating
destructive
ultrasonic
waves
material
surfaces.
findings
indicated
high
destruction
capacity
which
partially
contributed
a
superior
yield
than
conventional
organic
solvents.
proposes
an
efficient
green
method
bioactive
compounds
fruits.
extracts
be
applied
meat
preservation
beverages
antioxidants.
