Journal of Oleo Science,
Год журнала:
2003,
Номер
52(11), С. 597 - 606
Опубликована: Янв. 1, 2003
Methyl,
ethyl
and
butyl
β-D-glucosaminide
6-O-fatty
acid
esters
were
prepared
by
the
novel
direct
transglycosylation
reaction
of
chitosan
with
methanol,
ethanol
butanol
using
resting
cells
chitosan-assimilating
strain,
Penicillium
sp.
KS018
as
enzyme
source
exo-β-D-GlcNase
followed
transesterification
fatty
methyl
ester
lipase.
Transesterification
lipase
depended
on
origin,
conditions,
such
temperature
pressure.
monoesters
demonstrated
excellent
surface
activity
in
aqueous
solution.
The
antimicrobial
properties
6-O-dodecanoyl-glucosaminides
stronger
compared
to
dodecyl
β-D-glucoside.
methyl,
glucosaminide
all
readily
biodegradable
activated
sludge.
Journal of Surfactants and Detergents,
Год журнала:
2000,
Номер
3(1), С. 1 - 11
Опубликована: Янв. 1, 2000
Abstract
Ultimate
aerobic
biodegradabilities
of
an
array
sugar
ester
surfactants
were
determined
by
International
Standards
Organisation
method
7827,
“Water
Quality—Evaluation
in
Aqueous
Medium
the
Aerobic
Biodegradability
Organic
Compounds,
Method
Dissolved
Carbon”
(1984).
The
nonionic
esters
with
different‐sized
head
groups
(formed
from
glucose,
sucrose,
or
raffinose)
and
different
lengths
numbers
alkyl
chains
[formed
lauric
(C
12
)
palmitic
16
acid].
Analogous
anionic
surfactants,
formed
attaching
α‐sulfonyl
group
adjacent
to
bond,
α‐alkyl
substituents
also
studied.
It
was
found
that
variations
size
chain
length
number
do
not
significantly
affect
biodegradability.
In
contrast,
biodegradation
rate
groups,
although
sufficient
for
them
be
classified
as
readily
biodegradable,
dramatically
reduced
compared
unsubstituted
esters.
An
understanding
relationship
between
structure
biodegradability
provided
results
this
study
will
aid
targeted
design
biodegradable
use
consumer
products.
Chemical and Biological Technologies in Agriculture,
Год журнала:
2024,
Номер
11(1)
Опубликована: Янв. 22, 2024
Abstract
Pure
cellulose
nanofibers
(CNFs)
rapidly
degrade
in
soil,
limiting
their
prospective
applications
agriculture.
We
incorporated
lignin
into
CNFs
as
an
antimicrobial
and
crosslinking
agent
to
control
the
biodegradation
rate.
with
different
concentrations
were
prepared
by
mechanochemical
treatment
presence
of
choline
chloride-urea
deep
eutectic
solvent.
These
characterized
using
conductometric
titration,
scanning
electron
microscopy,
FT-IR.
The
fibers
applied
soil
determine
effect
on
respiration
nanocellulose
degradation,
used
a
substrate
for
radish
cress
seed
germination.
Modifying
content
successfully
modulated
rate
soil.
Fibers
containing
35%
degraded
5.7%
14
days,
while
20%
20.8%
days.
Nanofiber
suspensions
showed
low
chemical
inhibition
germination
seeds
but
higher
contents
reduced
imbibition
coating.
This
study
presents
first
use
one-pot,
scalable
sustainable
system,
allowing
advancement
lignocellulose
such
coatings,
mulches,
controlled
release
fertilizers.
Graphical
Journal of Colloid and Interface Science,
Год журнала:
2024,
Номер
674, С. 209 - 224
Опубликована: Июнь 21, 2024
Aqueous
solutions
of
long-chain
water-soluble
sucrose
ester
surfactants
exhibit
non-trivial
response
to
temperature
variations,
revealing
a
peak
in
viscosity
around
40-50
°C.
While
previous
investigations
have
explored
the
structures
within
stearate
systems
at
various
constant
temperatures,
comprehensive
understanding
entire
dependence
and
underlying
molecular
factors,
contributing
this
phenomenon
is
currently
missing.
Biocatalysis and Biotransformation,
Год журнала:
2017,
Номер
35(4), С. 298 - 305
Опубликована: Июнь 15, 2017
This
work
describes
the
immobilization
of
porcine
pancreatic
lipase
(PPL),
obtained
from
crude
extract,
on
silica
coated
with
octyl
groups
(OS)
by
interfacial
adsorption,
a
simple
and
low-cost
protocol.
The
biocatalyst
PPL-OS
was
employed
to
enzymatic
preparation
fatty
acid
esters
d-xylose,
product
used
especially
in
field
cosmetics
pharmacy,
dermatology,
improving
functionality
epidermal
cells.
yields
terms
activity
protein
concentration
(98%
75%,
respectively)
suggested
that
PPL
present
extract
selectively
immobilized
octyl-silica
support,
which
allowed
hyperactivation
(recovered
activity,
144%),
phenomenon
may
be
attributed
activation
enzyme
hydrophobic
surfaces.
showed
very
robust
organic
medium
at
high
temperature,
is
an
extremely
important
characteristic
produce
sugar
industrial
point
view.
syntheses
xylose
(oleate,
caprylate
butyrate)
yielded
conversions
around
70%
after
short
reaction
period
(2
h)
60
°C
tert-butyl
alcohol.
biocatalyst,
even
incubation
for
24
h,
could
reused
four
esterification
cycles
2-h
°C,
maintaining
100%
its
catalytic
activity.
Foods,
Год журнала:
2024,
Номер
13(1), С. 175 - 175
Опубликована: Янв. 4, 2024
Different
structural
composition
ratios
of
sucrose
stearates
with
hydrophilic–hydrophobic
balance
(HLB)
values
ranging
from
1
to
16
on
lipolysis
in
emulsion
were
investigated
using
a
simulated
gastrointestinal
tract
(GIT).
Results
showed
direct
correlation
between
the
HLB
and
rate
emulsions,
lower
value
led
diminished
GIT
simulation
model.
Mechanism
study
indicated
that
poor
emulsifying
capacity
inhibited
digestive
behavior
oil.
In
addition,
monoester
was
mainly
hydrolyzed
gastric
phase,
whereas
polyesters
caused
intestinal
phase
an
vitro
model
HPLC
analysis,
further
suppressing
lipid
digestion.
Furthermore,
decrease
cell
cytotoxicity
proinflammatory
effects
Caco-2
Raw264.7
observed
post-digestion,
respectively.
This
work
offers
important
insights
into
degree
esterification
stearate
digestion
oil-in-water
emulsions.
Journal of Surfactants and Detergents,
Год журнала:
2002,
Номер
5(3), С. 235 - 244
Опубликована: Июль 1, 2002
Abstract
A
new
group
of
nonionics,
so‐called
sugar
surfactants
having
a
gemini
structure,
N,N′
‐bisalkyl‐
‐bis[(3‐gluconylamido)propyl]ethylenediamines
[bis(C
n
GA):
C
=
‐C
8
H
17
,
12
25
],
‐bisdodecyl‐
‐bis[(3‐glucoheptonylamido)propyl]ethylenediamine
GH)],
and
‐bis[(3‐lactobionylamido)propyl]ethylenediamines
LA):
were
prepared
in
convenient
four‐step
procedure
from
easily
accessible
reagents.
Their
structure
purity
confirmed
by
means
elemental
analysis,
electrospray
ionization
MS
(ESI‐MS),
NMR
spectra—
1
H,
13
C,
H−
COSY,
distortionless
enhancement
polarization
transfer.
All
tested
practically
nontoxic
to
gram‐negative
bacteria
fungi,
but
they
inhibited
the
growth
some
gram‐positive
bacteria.
From
results
Closed
Bottle
test
(OECD
Guideline
301D)
for
biodegradability
measurements,
it
was
concluded
that
aldonamide
structures
are
biodegraded
environmental
microorganisms
16–55%
initial
levels
day
28,
extent
depending
on
both
type
alkyl
chain
length.
Consequently,
‐bis[(3‐aldonylamido)propyl]ethylenediamines
surfactant
class
low
ecotoxicity
fulfilling
requirements
desired
an
ecological
standpoint.
