Viscosity and Oscillatory Rheology

Miri, Taghi

doi:10.1002/9781444391060.ch2

Cited by 18 publications

(11 citation statements)

References 47 publications

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“…Dynamic oscillatory analysis provides structural information through the distinction between elastic and viscous contribution to a measured stress as a function of frequency or temperatures in a non‐destructive way . Dynamic oscillatory rheological properties of HSJ‐treated samples are depicted in Fig.…”

Section: Resultsmentioning

confidence: 99%

Influence of high-speed jet on solubility, rheological properties, morphology and crystalline structure of rice starch

Luo

BeMiller

et al. 2015

Starch - Stärke

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Influences of high speed jet (HSJ) treatment on solubility, rheological characteristics, morphology, and crystalline structure of indica rice starch were investigated. The solubility of indica rice starch was improved significantly from 1.34 to 32.4%. Dynamic oscillation analysis revealed that HSJ treatment significantly altered the viscoelasticity of rice starch. During a dynamic frequency sweep, G′20 Hz was decreased from 3382 to 268 Pa, indicating that HSJ treatment had a great influence on the elasticity of the resulting rice starch gel. Scanning electron microscopy (SEM) showed that rice starch granules lost their integrity. X‐ray diffraction (XRD) analysis revealed that, upon HSJ treatment, rice starch lost it A‐type crystalline structure and became amorphous. Differential scanning calorimetry (DSC) analysis showed a decrease in onset temperatures (To) and gelatinization enthalpies (ΔH) and on increase in peak temperatures (Tp). The results indicated that the HSJ treatment is an effective technique for improving rice starch solubility and altering its rheological properties.

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Section: Resultsmentioning

confidence: 99%

Influence of high-speed jet on solubility, rheological properties, morphology and crystalline structure of rice starch

Luo

BeMiller

et al. 2015

Starch - Stärke

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“…The maximum G 0 values observed within the linear viscoelastic region (LVR) during strain sweep measurements (at 0.1% strain), were used to compare the impact of the different parameters (HC configuration, pressure level and inulin concentration) on the elastic properties of the samples. Higher G 0 values indicate the samples higher ability to store energy, which is highly correlated to the presence of stronger networks or more solid-like behaviours (Miri, 2011). Fig.…”

Section: Rheological Propertiesmentioning

confidence: 93%

Impact of high pressure homogenisation (HPH) on inulin gelling properties, stability and development during storage

2015

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“…For n = 1, flow behaviour is Newtonian. For n < 1 and n > 1, the behaviour is shear thinning and shear thickening, respectively (Miri, ). For solutions of disordered polysaccharides, the frequency dependence (ω) of dynamic viscosity (

normalη

*) is closely superimposable on the shear rate (

\overset{γ}{true}

) dependence of steady shear viscosity (η) when the same numerical values of ω and

\overset{γ}{true}

are compared.…”

Section: Shear and Extensional Rheologymentioning

confidence: 99%

Shear and extensional rheology of selected polysaccharides

Evageliou

2020

Int J of Food Sci Tech

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Rheology is used for the elucidation of the flow properties of polysaccharide solutions. For a given polysaccharide, both shear and extensional rheological experiments should be performed for the full characterisation of its flow properties. The provided information will facilitate the efficient exploitation of a polysaccharide in various applications. Although shear rheology is widely used in polysaccharides' characterisation, there are only limited extensional rheology studies due to lack of reliable techniques in the formation of pure extensional flow. However, recently, several commercial extensional rheometers have been developed and thus, accurate extensional experiments can now be performed. The present work initially presents the principles and concepts of both shear and extensional rheology and then reports rheological findings for solutions of various polysaccharides and their derivatives. Xanthan and various members of the galactomannan, cellulose and alginate families were selected.

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Viscosity and Oscillatory Rheology

Cited by 18 publications

References 47 publications

Influence of high-speed jet on solubility, rheological properties, morphology and crystalline structure of rice starch

Influence of high-speed jet on solubility, rheological properties, morphology and crystalline structure of rice starch

Impact of high pressure homogenisation (HPH) on inulin gelling properties, stability and development during storage

Shear and extensional rheology of selected polysaccharides

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