Thermodynamics of Micelle Formation of Selected Homologous 7-Alkyl Derivatives of Na-Cholate in Aqueous Solution: Steroid Skeleton and the Alkyl Chain Conformation
International Journal of Molecular Sciences,
Journal Year:
2024,
Volume and Issue:
25(23), P. 13055 - 13055
Published: Dec. 4, 2024
Bile
acid
salts
are
steroid
biosurfactants
that
build
relatively
small
micelles
compared
to
surfactants
with
an
alkyl
chain
due
the
rigid
conformation
of
skeleton.
In
order
increase
capacity
micellar
solubilization
hydrophobic
molecular
guest,
certain
C7
derivatives
were
synthesized.
Namely,
introducing
group
in
position
skeleton
results
a
more
effective
micelle's
domain
(core)
than
introduction
C3
position.
comparison,
fewer
synthetic
steps
required
if
groups
introduced
into
C12
cholic
Grignard
reaction.
Here,
thermodynamic
parameters
micellization
(demicellization)
(number
C
atoms
group:
2,
3,
4,
and
8)
anion
aqueous
solution
without
additives
examined
(which
have
not
yet
been
determined)
temperature
interval
Language: Английский
Ionic surfactants critical micelle concentration modelling in water/organic solvent mixtures using random forest and support vector machine algorithms
Tenside Surfactants Detergents,
Journal Year:
2024,
Volume and Issue:
unknown
Published: Dec. 10, 2024
Abstract
The
physicochemical
property
of
surfactants
that
is
widely
used
to
study
their
behavior
the
critical
micellar
concentration
(CMC).
value
this
specific
each
surfactant
as
it
depends
on
a
number
external
factors
and
chemical
composition
surfactant.
This
research
focused
using
two
new
machine
learning
approaches,
Random
Forest
(RF)
Support
Vector
Machine
(SVM),
predict
logarithmic
CMC
10
ionic
surfactants.
same
database
from
previous
(a
total
258
experimental
cases)
was
with
input
variables
–
those
defining
mixture
organic
solvent-water:
T,
molecular
weight,
molar
fraction
log
P;
surfactant:
atoms
element
develop
predictive
models.
best
RF
SVM
models
were
then
compared
ANN
model
developed
in
study.
According
results,
normalized
presented
lowest
RMSE
values
validation
phase.
Finally,
approaches
proposed
are
suitable
tools,
together
ANN,
for
prediction
possible
alternative
methods
replace
expensive
laboratory
measurements.
Language: Английский