The rheological properties of several commercial topical fluoride gels were studied. For that purpose, we investigated hysteresis loops under standard conditions, equilibrium values, apparent viscosities as a function of shear rate, rate of thixotropic recovery, and the influence of temperature.

Small amplitude oscillatory rheometry (SAOR) was used to study gel formation. A constant shear rate was applied to gels of various ages to try to simulate the cutting process used in cheese vats. Second‐order polynomial models successfully predicted (R 2 ≥ 0.83) the relationship between processing parameters and rheological properties of gels.

Författare :Mats how the structure of the gel influences its rheological properties. Non-destructive viscoelastic measurements and fracture techniques were used. READ MORE Abstract : The focus of this thesis is the relation between the rheological and structural properties of mixed particulate gels, based on β-lactoglobulin, determined av P Walkenström · 1997 · Citerat av 40 — Microstructural and rheological properties of high-pressure treated mixed and pure gels of gelatin and whey protein concentrate (WPC) were It was found that Cladophora cellulose forms gel structures at cellulose cellulose, Avicel RC/CL grades, Dispersive cellulose, Gels, Rheological properties The rheological properties of gels of hydrophobically modified potato starch (HMPot) and high amylopectin potato starch (HAPP) were studied by small The influence of amylopectin (Ap) (in the form of high amylopectin potato starch, HAPP) on the rheological properties of its mixtures with amylose (Am) has been Rheological analysis. The purpose of rheology is to analyse materials' mechanical properties and to Characteristic phenomena (gel time, minimum viscosity.

All the gels studied exhibited linear viscoelastic behaviour. We study spreading and rheological properties of potato starch gel which is a non-Newtonian fluid. An interesting oscillatory behavior is observed when the gel spreads on a glass surface under The type and the nature of bonds in these networks and the time scale of applied deformation affected the rheological properties of rennet gels. As time after rennet addition increased, storage modulus, loss modulus and yield stress values increased. This resulted from an increase in … VYCROSS Volbella gel exhibited a higher elastic modulus G' than the other Allergan gels, roughly nearing the NASHA gel values. Preserved Network RHA 2 gel exhibited values that were close to its partially cohesive "competitors", except for Vycross.

Jun 21, 2013 The huge differences in magnetorheological properties of different MR gels (for example, the G' of MR gels without solvent is three orders of

The rheological properties of the gels were determined by oscillatory viscometry at a stress range of 0 - 100 Pa and a frequency of 0.05 Hz using a 1 mm gap. The dynamic moduli of gels filled with particles have been studied as a function of the volume fraction of dispersed particlesϑ f (0–0.4) and of the way in which they interact with the gel matrix. Two gels of different nature were studied, viz.

In particular, the gelling properties of zein promote the formation of a porous network, which can be easily used for the controlled leakage of the entrapped bioactive compounds. Several studies have described the rheological behavior of speciﬁc fractions of zein such as - and -zein dispersions,

First: To measure the linear viscoelastic properties such as elastic modulus and zero shear viscosity of the carbomer (Carbopol) gels in the cosolvent system. Gel, which consists mostly of ﬂuid, has the remarkable ability to behave as a solid while retaining many characteristics of the properties of the ﬂuid components (Mulvihill & Kinsella, 1987). To evaluate the rheological properties of gels many con- siderations should be taken into account; one is related to composition.

Rheological and structural characterization of carrageenan emulsion gels. and rheological properties of a cell-loaded peptide gel during ECM production. Rheology of cellulose nanofibers suspensions: boundary driven flow includes extreme shear-thinning as well as viscoelastic properties and a yield stress been explained in the past as weak gel structures that break down in shear, but for For rheological analyses, viscoelastic data were collected with plate-plate geometry of 25mm, temperature regulated by a Peltier-effect plate, and the following assessed: Strain sweep from 0.01% to 3000% strain at 1Hz over frequency sweep from 0.1 to 100 Hz. Results: NASHA Restylane gels with and without lidocaine exhibited similar viscoelastic characteristics, with very similar tan δ values, but the elastic modulus G' proved significantly higher when the gel was injected with lidocaine vs The rheological properties of several commercial topical fluoride gels were studied. For that purpose, we investigated hysteresis loops under standard conditions, equilibrium values, apparent viscosities as a function of shear rate, rate of thixotropic recovery, and the influence of temperature.
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Food Hydrocolloids , 82 , 268–277. 10.1016/j.foodhyd.2018.01.013 [ CrossRef ] [ Google Scholar ] Relation between Rheological Properties of Pectin Gels and Pectin Fine Structure Anna Ström1, Leif Lundin2, Ed Morris3 and Martin A.K. Williams4,5 1 Pharmaceutical Technology, Chemical and Biological Engineering, Chalmers University of Technology, 412 96 Göteborg, Sweden 2Food Science Australia, Private Bag 16, Werribee, Vic 3030, Australia The impact of oat β-glucan concentration and molecular weight (MW) on gel properties was investigated.

Rheological properties and microstructures of Carbopol gel network system Rheological properties of a surfactant-induced gel for the lysozyme-sodium dodecyl sulfate-water system. / Montalvo, G; Khan, Ali. I: Colloid and Polymer Science, Vol. 283, Nr. 4, 2005, s. 402-412. Forskningsoutput: Tidskriftsbidrag › Artikel i vetenskaplig tidskrift As is well known, the isoelectric point although the rheological properties of gelatin is determined by the pH value at which the (Ward and Saunders (16), Veis (15), Watase and velocity of electrophoresis becomes zero and Arakawa (17) and agar-agar or agarose (Watase the viscosity becomes minimum.
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Materials and Methods: Rheological properties of gel solutions with different concentrations were measured using oscillatory rheometry. Agarose gels of 1% and 2 The rheological properties at small (oscillatory shear) and large (uniaxial compression) deformations of heat-induced gels (80 °C for 20 min, pH 7.3) containing It is shown that under defined conditions gel is formed in the glycol from the glycol regeneration plants, which created significant operational problems. Rheological properties of gelatin, gelatin/regular and gelatinlwaxy corn starch composite gels were investigated using oscillatory shear, constant rate uniaxial Jun 3, 2019 Rheological Properties, Dissolution Kinetics, and Ocular Pharmacokinetics of Loteprednol Etabonate (Submicron) Ophthalmic Gel 0.38%.

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The rheological and thixotropic properties of modified attapulgite were also investigated. Because of the need to improve occupational safety, another aim of the work in this paper was to investigate practical ways in the preparation of modified attapulgite gel to substitute asbestos in

most of rheological investigations have been focused on steady shear viscosity and sol-gel transition phenomenon. Based upon the above-described backgrounds, the present study has been undertaken to characterize the rheological properties of concentrated poloxamer 407 solutions and gels shear flow in various fields. EXPERIMENTAL SECTION a key role in the rheological properties of agar-agar gels [1]. It is a linear polysaccharide composed of D-galactose and 3,6-anhydro-L-galactose. Its aqueous solution forms a gel at room temperature even: at very dilute concentrations, such as 0.1 per cent, and so it has 2020-04-01 The filled gel had improved rheological properties, including the yield point, viscosity, flow index, and consistency index (Voron'ko et al., 2002).