Advancements in MQL machining: a comparative study of cutting fluids on AISI 630 steel
The International Journal of Advanced Manufacturing Technology,
Год журнала:
2025,
Номер
unknown
Опубликована: Янв. 6, 2025
Язык: Английский
Renewable syngas and biodiesel dual fuel applications for enhanced engine performance and emission control
Industrial Crops and Products,
Год журнала:
2025,
Номер
225, С. 120509 - 120509
Опубликована: Янв. 18, 2025
Язык: Английский
Optimization of solar water heating absorber riser with header tube using RSM and CFD simulation
Sivakumar Narayanasamy,
George Iruthayasamy,
Perumal Ramesh Kannan
и другие.
Matéria (Rio de Janeiro),
Год журнала:
2025,
Номер
30
Опубликована: Янв. 1, 2025
ABSTRACT
The
growing
global
energy
demand
and
environmental
concerns
underscore
the
importance
of
optimizing
solar
water
heating
systems
(SWHS)
with
an
emphasis
on
material
properties
to
enhance
thermal
efficiency.
Despite
technological
advancements,
challenges
in
selection,
riser
tube
design,
operational
parameters
limit
performance
SWHS.
This
study
focuses
efficiency
a
flat
plate
collector
by
integrating
analysis
within
combined
Computational
Fluid
Dynamics
(CFD)
simulation
Response
Surface
Methodology
(RSM)
framework.
By
exploring
effects
count,
conductivity,
mass
flow
rate,
inclination
angle,
demonstrates
how
significantly
influence
heat
transfer.
Copper,
as
absorber
material,
exhibited
superior
performance,
optimized
conditions
achieving
maximum
outlet
temperature
350.61
K.
CFD-RSM
methodology
minimized
experimental
iterations
provided
deeper
understanding
interplay
between
system
dynamics.
These
findings
highlight
critical
role
selection
developing
cost-effective,
high-efficiency
absorbers.
Future
research
should
investigate
advanced
materials
innovative
geometries
sustainability
SWHS
further.
Язык: Английский
Consequences of Micro- and Macronutrient Deficiencies on Physiological and Growth Metrics in Hydroponic ‘Thompson Seedless’ Grapevines
Horticulturae,
Год журнала:
2025,
Номер
11(5), С. 543 - 543
Опубликована: Май 18, 2025
(1)
Background:
Mineral
nutrient
deficiencies
are
a
major
constraint
on
grapevine
growth
and
productivity,
yet
the
clear
identification
of
deficiency
symptoms
their
physiological
impacts
remains
challenging.
(2)
Methods:
In
this
study,
‘Thompson
Seedless’
grapevines
were
grown
hydroponically
under
controlled
omission
ten
essential
nutrients
(N,
P,
K,
Ca,
Mg,
Fe,
Mn,
B,
Zn,
Cu)
to
assess
impact
growth,
leaf
morphology,
chlorophyll
content,
photosynthesis,
respiration,
tissue
concentrations.
(3)
Results:
Deficiencies
in
N,
B
caused
distinct
symptoms:
nitrogen
(N)
led
pale
leaves
with
bluish-green
veins,
phosphorus
(P)
yellowing
apical
followed
by
interveinal
chlorosis,
potassium
(K)
induced
yellow
discoloration,
curling,
rotting
leaves.
Manganese
(Mn)
boron
(B)
showed
such
as
irregular
shapes
brittle,
glossy
leaves,
respectively.
These
resulted
reduced
dry
matter
accumulation,
decreased
shoot
length,
lower
content.
contrast,
iron
(Fe)
copper
(Cu)
had
minimal
effects,
closely
resembling
those
control
conditions
only
slight
suppression.
Notably,
Mg
significant
reductions
Cu,
N
levels,
particularly
evident
through
newly
formed
(4)
Conclusions:
significantly
affect
processes,
nutritional
quality.
findings
emphasize
importance
maintaining
balanced
mineral
nutrition
for
optimal
health
productivity.
Язык: Английский
Optimization of graphene-functionalized polycaprolactone nanofibers: enhancing mechanical, thermal, and biocompatibility properties for biomedical applications
T. S. Sankar,
T K Kannan,
Rajasekar Rathanasamy
и другие.
Digest Journal of Nanomaterials and Biostructures,
Год журнала:
2025,
Номер
20(2), С. 443 - 456
Опубликована: Май 15, 2025
The
development
of
biocompatible
materials
with
enhanced
properties
is
critical
for
biomedical
applications.
However,
polycaprolactone
(PCL),
a
widely
used
biodegradable
polymer,
exhibits
insufficient
mechanical
and
thermal
demanding
This
study
addresses
the
challenge
by
incorporating
carboxyl-functionalized
graphene
(CFG)
hydroxyl-functionalized
(HFG)
derivatives
into
PCL
nanofibers
using
electrospinning.
objective
to
optimize
content
improve
strength,
stability,
biocompatibility
nanocomposites.
Electrospun
varying
concentrations
(0.5,
1,
2
wt%)
were
characterized
morphology,
properties,
behavior,
cell
viability.
Results
demonstrated
that
1
wt%
provided
optimal
performance,
significantly
enhancing
tensile
strength
(5.5
MPa
CFG,
5.4
HFG)
Young's
modulus
while
maintaining
uniform,
bead-free
fibers.
Thermal
analysis
revealed
improved
crystallinity
degradation
temperature,
MTT
assays
showed
superior
viability
(up
93%)
at
graphene.
These
highlight
potential
PCL/graphene
nanocomposites
as
high-performance
biomaterials
tissue
regeneration.
Future
research
should
explore
in
vivo
performance
long-term
biological
effects
confirm
their
clinical
Язык: Английский