Role of the Surface State and Structural Feature in the Thermoreversible Sol−Gel Transition of a Zirconyl Aqueous Precursor Modified by Sulfuric Acid

2004 ◽  
Vol 16 (21) ◽  
pp. 3995-4004 ◽  
Author(s):  
L. A. Chiavacci ◽  
C. V. Santilli ◽  
S. H. Pulcinelli ◽  
C. Bourgaux ◽  
V. Briois
Keyword(s):  
Sulfuric Acid ◽  
Structural Feature ◽  
Surface State ◽  
Sol Gel ◽  
Sol Gel Transition ◽  
Gel Transition

scholarly journals Major Role of Voluminosity in the Compressibility and Sol–Gel Transition of Casein Micelle Dispersions Concentrated at 7 °C and 20 °C

Foods ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 652
Author(s):  
Floriane Doudiès ◽  
Anne-Sophie Arsène ◽  
Fabienne Garnier-Lambrouin ◽  
Marie-Hélène Famelart ◽  
Antoine Bouchoux ◽  
...  
Keyword(s):  
Equilibrium Dialysis ◽  
Sol Gel ◽  
Casein Micelle ◽  
New Information ◽  
Wide Range ◽  
Sol Gel Transition ◽  
The Cost ◽  
Micelle Hydration ◽  
Gel Transition

The objective of this work is to bring new information about the influence of temperatures (7 °C and 20 °C) on the equation of state and sol–gel transition behavior of casein micelle dispersions. Casein micelle dispersions have been concentrated and equilibrated at different osmotic pressures using equilibrium dialysis at 7 °C and 20 °C. The osmotic stress technique measured the osmotic pressures of the dispersions over a wide range of concentrations. Rheological properties of concentrated dispersions were then characterized, respectively at 7 °C and at 20 °C. The essential result is that casein micelle dispersions are less compressible at 7 °C than at 20 °C and that concentration of sol–gel transition is lower at 7 °C than at 20 °C, with compressibility defined as the inverse to the resistance to the compression, and that is proportional to the cost to remove water from structure. From our interpretations, these two features were fully consistent with a release of soluble β-casein and nanoclusters CaP and an increased casein micelle hydration and apparent voluminosity at 7 °C as compared with 20 °C.

Role of viscoelasticity in the tube model of airway reopening. II. Non-Newtonian gels and airway simulation

1996 ◽  
Vol 80 (5) ◽  
pp. 1649-1659 ◽  
Author(s):  
S. H. Hsu ◽  
K. P. Strohl ◽  
M. A. Haxhiu ◽  
A. M. Jamieson
Keyword(s):  
Viscoelastic Properties ◽  
Flow Instability ◽  
Sol Gel ◽  
Tube Model ◽  
Airway Reopening ◽  
Pharyngeal Airway ◽  
Airway Tube ◽  
Sol Gel Transition ◽  
Gel Transition

The influence of viscoelastic gels as lining fluids on the pressure-velocity relationships in an airway tube model (Gaver et al. J. Appl. Physiol. 69: 74-85, 1990) was examined. A flow instability was observed due to the occurrence of a sol-gel transition in the viscoelastic properties under flow conditions. We further report measurements of the viscoelastic properties of airway secretions. Airway secretions are gels under small strains and have a yield stress of 4-7 dyn/cm2. Secretions from the pharyngeal airway show lower elasticity than secretions from the trachea. The airway reopening process is simulated using a Weibel lung geometry by incorporating the constitutive equations from the model gel studies and utilizing the rheological data on airway secretions. In these simulations, a "popping-open" phenomenon arises from a flow instability in airway generations 8-14 when the rheological properties of the lining fluids are assumed to be similar to those of pharyngeal secretions. On the basis of these studies, the elasticity of airway secretions plays an important role in airway reopening.

Nonlinear Rheology of Random Sulfonated Polystyrene Ionomers: The Role of the Sol–Gel Transition

2016 ◽  
Vol 49 (23) ◽  
pp. 9203-9214 ◽  
Author(s):  
Chongwen Huang ◽  
Quan Chen ◽  
R. A. Weiss
Keyword(s):  
Sol Gel ◽  
Sulfonated Polystyrene ◽  
Nonlinear Rheology ◽  
Sol Gel Transition ◽  
Gel Transition

scholarly journals Role of sonication pre-treatment and cation valence in the sol-gel transition of nano-cellulose suspensions

2017 ◽  
Vol 7 (1) ◽  
Author(s):  
C. A. Maestri ◽  
M. Abrami ◽  
S. Hazan ◽  
E. Chistè ◽  
Y. Golan ◽  
...  
Keyword(s):  
Sol Gel ◽  
Nano Cellulose ◽  
Sol Gel Transition ◽  
Pre Treatment ◽  
Gel Transition

Structural and Phenomenological Characterization of the Thermoreversible Sol−Gel Transition of a Zirconyl Aqueous Precursor Modified by Sulfuric Acid

1998 ◽  
Vol 10 (4) ◽  
pp. 986-993 ◽  
Author(s):  
L. A. Chiavacci ◽  
S. H. Pulcinelli ◽  
C. V. Santilli ◽  
V. Briois
Keyword(s):  
Sulfuric Acid ◽  
Sol Gel ◽  
Sol Gel Transition ◽  
Gel Transition

Sol-gel transition in silica alkaline solutions. A NMR study

1994 ◽  
Vol 91 ◽  
pp. 901-908 ◽  
Author(s):  
H Zanni ◽  
P Nieto ◽  
L Fernandez ◽  
R Couty ◽  
P Barret ◽  
...  
Keyword(s):  
Sol Gel ◽  
Alkaline Solutions ◽  
Nmr Study ◽  
Sol Gel Transition ◽  
Gel Transition
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