Agriculture,
Год журнала:
2024,
Номер
14(2), С. 182 - 182
Опубликована: Янв. 25, 2024
This
study
was
conducted
to
investigate
the
drying
kinetics
and
internal
external
mass
transfer
characteristics
of
walnuts
for
an
understanding
mechanism.
The
characteristics,
color
walnut
during
hot
air
(HAD)
were
investigated
under
different
initial
moisture
content
(IMC)
(0.35,
0.39,
0.43
g
water/g
wet
mass)
temperatures
(50,
60,
70,
80
°C).
results
indicated
that
IMC
temperature
both
have
significant
effects
on
process
walnut,
showing
higher
IMC,
longer
preheating
time,
smaller
effective
diffusivity
(Deff)
coefficient
(hm),
but
reverse
temperature.
values
Deff
hm
ranged
from
4.94
×
10−10
1.44
10−9
m2/s
1.24
10−7
3.90
m/s,
respectively.
activation
energy
diffusion
21.56
23.35
kJ/mol
28.92
33.43
kJ/mol,
Multivariate
linear
prediction
models
also
established
estimating
as
a
function
HAD
parameters.
has
greater
effect
kernel
lightness
than
IMC.
Verma
et
al
model
could
be
used
describe
walnut.
findings
contribute
mechanisms
in
practical
value
evaluation
improvement
systems.
Molecules,
Год журнала:
2022,
Номер
27(22), С. 7693 - 7693
Опубликована: Ноя. 9, 2022
Walnut
oil,
like
all
vegetable
oils,
is
chemically
unstable
because
of
the
sensitivity
its
unsaturated
fatty
acids
to
oxidation
phenomenon.
This
phenomenon
based
on
a
succession
chemical
reactions,
under
influence
temperature
or
storage
conditions,
that
always
lead
considerable
change
in
quality
oil
by
promoting
through
degradation
their
C-C
double
bonds,
leading
formation
secondary
products
reduce
nutritional
values
oil.
research
examines
oxidative
stability
roasted
and
unroasted
cold-pressed
walnut
oils
accelerated
conditions.
The
both
was
evaluated
using
physicochemical
parameters:
composition
(fatty
acids,
phytosterols,
tocopherols),
pigment
content
(chlorophyll
carotenoids),
specific
extinction
coefficients
(K232
K270),
indicators
(acid
peroxide
value)
as
well
evaluation
radical
scavenging
activity
DPPH
method.
changes
these
parameters
were
within
60
days
at
±
2
°C.
results
showed
levels
total
acid
value,
K232
K270,
increased
slightly
for
tocopherol
antioxidant
affected
roasting
process.
In
contrast,
profiles
did
not
considerably
during
our
study.
After
two
months
treatment
°C,
studied
still
an
excellent
profile,
which
allows
us
conclude
are
stable
can
withstand
such
may
be
due
tocopherols
(vitamin
E),
acts
antioxidant.
AgriEngineering,
Год журнала:
2022,
Номер
4(3), С. 626 - 655
Опубликована: Июль 11, 2022
The
transformation
and
upgrading
of
traditional
agriculture
are
required
to
address
its
shortcomings
deficiencies,
which
have
resulted
in
environmental
pollution
or
water
problems.
Precision
emerged
at
the
historic
moment
solve
current
Field
information
collection,
management
decision-making,
execution
systems
three
key
links
precision
fertilization
irrigation.
technical
principle
application
field
acquisition
analyzed.
decision-making
system
describes
summary
crop
growth.
combines
knowledge
various
disciplines
experts
for
targeted
applications
specific
crops.
It
further
focuses
on
core
implementation
system,
that
is,
variable
technology
spraying
can
realize
operations.
Major
contributions
from
different
countries,
institutions,
corresponding
authors,
journals
presented
detail.
This
study
proposes
several
suggestions
ideas
based
research
status
progress
provide
a
theoretical
basis
support
development
technologies
innovative
devices
agricultural
Agriculture,
Год журнала:
2024,
Номер
14(2), С. 182 - 182
Опубликована: Янв. 25, 2024
This
study
was
conducted
to
investigate
the
drying
kinetics
and
internal
external
mass
transfer
characteristics
of
walnuts
for
an
understanding
mechanism.
The
characteristics,
color
walnut
during
hot
air
(HAD)
were
investigated
under
different
initial
moisture
content
(IMC)
(0.35,
0.39,
0.43
g
water/g
wet
mass)
temperatures
(50,
60,
70,
80
°C).
results
indicated
that
IMC
temperature
both
have
significant
effects
on
process
walnut,
showing
higher
IMC,
longer
preheating
time,
smaller
effective
diffusivity
(Deff)
coefficient
(hm),
but
reverse
temperature.
values
Deff
hm
ranged
from
4.94
×
10−10
1.44
10−9
m2/s
1.24
10−7
3.90
m/s,
respectively.
activation
energy
diffusion
21.56
23.35
kJ/mol
28.92
33.43
kJ/mol,
Multivariate
linear
prediction
models
also
established
estimating
as
a
function
HAD
parameters.
has
greater
effect
kernel
lightness
than
IMC.
Verma
et
al
model
could
be
used
describe
walnut.
findings
contribute
mechanisms
in
practical
value
evaluation
improvement
systems.
