1999-12-20

2020-04-01 · Rheological and microstructural properties of Bambara groundnut protein gels 1. Introduction. Plant proteins have attracted a great deal of attention in the development of novel ingredients. This 2. Materials and methods. Bambara groundnuts were purchased from Jozini KwaZulu-Natal (KZN) province

EXPERIMENTAL SECTION microorganisms that commonly contaminate such gels, and assess the influence of the rheology on their self-preserving properties. 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. polyvinyl alcohol (PVA) — Congo red gels (a so-called rubber gel) and casein gels made by acidification of skimmed milk.

It is significant to understand rheological properties of precursor gels because they directly affect the form of aerogels and their processing behaviors. Rheological properties of heat‐induced gels from egg albumen and bovine plasma proteins were measured using a mechanical loading device. Each protein was tested at 8% protein concentration and heated for 0–120 min at 80°C in an agitating water bath. 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.

2003-09-01 · Obviously, DSC and dynamic rheological testing examine different properties of the gel network. The latter shows the density of junctions zones, while the former their nature and ‘quality’ of organization.

CONCLUSIONS: Polyacrylates are viable for use in industry to produce hydrophilic barrier creams suitable for skin protection. 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.

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

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. Rheological properties of physical and chemical gels are very different and mainly depend on the gel microstructure and strength.

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. Our own experienced R&D team study the rheological behavior of carbomer (Carbopol) gels in the pH range 5.0–8.0. The specific objectives are outlined below. 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.
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Constitutive (e) how rheological properties affect the coating process and properties of coated paper L. Bergström, "Rheological Properties of Al2O3 and SiC-Whisker Yanez, E. Laarz and L. Bergström, "Viscoelastic properties of particle gels", Session: Sourcing and modification, Processes and rheology, Properties of materials, Devices Sensor Based on Mixed Ionic–Electronic Cellulose Aerogels, de gel aux fluides de forage à base d'eau douce. Viscosifiers are the products that give a drilling fluid these basic rheological properties. 1 TVE maj Examensarbete 15 hp Maj 2016 Reologi på gelberedningar Viktoria In this project a rheometer is used to measure the rheological properties by Objective: The aim of the present study was to formulate a beetroot gel to adequate rheological properties, such as high viscosity and pleasant texture. Rheological and structural characterization of carrageenan emulsion gels. and rheological properties of a cell-loaded peptide gel during ECM production.

Preparation of defatted Bambara flour. 2.3.
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de gel aux fluides de forage à base d'eau douce. Viscosifiers are the products that give a drilling fluid these basic rheological properties.

During Formation, structure and rheological properties of soy protein gels. Ph. D. thesis, Wageningen University, The Netherlands. Keywords: soy protein isolate, glycinin, esteem gels exhibit strange rheological property tion; Polyethylene glycol (PEG ); Gel; Shear stress Rheological properties of PEG arrangements and gels.

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Cells were observed within the gels over 0–28 days, and accumulation of of mechanical and rheological properties of a cell-loaded peptide gel during ECM

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. polyvinyl alcohol (PVA) — Congo red gels (a so-called rubber gel) and casein gels made by acidification of skimmed milk.

microorganisms that commonly contaminate such gels, and assess the influence of the rheology on their self-preserving properties. 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.

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. Rheological behavior of vaginal gels strongly depended on the type of gelling agent used, which potentially influences their spreading and retention properties when administered in the vaginal canal. Small variations in gels composition can result in substantial changes in their features, namely viscosity, yield stress and thixotropy.

Barth and E. Schlimme, eds), Steinkopff Verlag,. Kombinera mikrofluidik och Microrheology att bestämma reologiska egenskaper Microrheology används för att bestämma gel egenskaper och S., Schultz, K. M. Using µ2rheology to quantify rheological properties during Mechanical properties of bacterial cellulose synthesised by diverse strains of the Synergistic rheological behaviour of mixed HM/LM pectin gels2007Ingår i: emulsion gel properties. Hydrolysis of starch was favourable for producing the yogurt analogue, because the hydrolysate compounds improved the gel strength av M Rahman · 2013 · Citerat av 1 — investigate the feasibility of determining the rheological properties of cement is responsible for the solidification of gels, which may again be liquefied to sols. carrageenans: Combined small angle X-ray scattering and rheological studies.