Effect of shear thinning on aspiration – Toward making solutions for judging the risk of aspiration

Nishinari, K.; Takemasa, Makoto; Su, Lei; Michiwaki, Yukihiro; Mizunuma, Hiroshi; Ogoshi, Hiro

doi:10.1016/j.foodhyd.2011.03.016

Cited by 45 publications

(34 citation statements)

References 30 publications

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“…The discrepancy between the viscosity data measured at increasing and decreasing shear rates may be due to imperfect sample preparation. However, a viscosity behavior similar to that found in this study has been shown for solutions of xanthan 11,22) , Aureobasidium pullulans cultures 24) , etc. Thus, it is thought that this discrepancy is caused by a structure change inherent in these biological polymer solutions.…”

Section: Correlation Between Viscosity Behavior and Solution Structuresupporting

confidence: 89%

“…The arrow in the figure indicates the portion of the shear thickening phenomenon, which is an increase of viscosity with increasing shear rate. Furthermore, as observed in the case of various biological polymer solutions 11,24) , the solution viscosity measured at increasing shear rates exceeds the viscosity measured at decreasing shear rates. The following consideration will be useful in elucidating this unique trend in the viscosity.…”

Section: Correlation Between Viscosity Behavior and Solution Structurementioning

confidence: 62%

“…11,22) That is, when the shear rate was increased in the low-shear-rate region, the viscosity increased to a maximum value and then decreased, showing shear thinning behavior. However, the viscosity showed no specific behavior for decreasing shear rates, when the sample experienced a high shear-rate.…”

Section: -5)mentioning

confidence: 99%

“…Quantitative information about the viscosity and viscoelasticity of this loose and sticky polymer solution is useful for its practical manipulation, and therefore, considerable effort has been devoted to studying the rheological properties of xanthan solutions. [8][9][10][11] The physical properties of xanthan solutions, including viscosity and viscoelasticity, vary depending on the experimental conditions, i.e., salt concentration and temperature, because of the complicated structure of xanthan. However, the fundamental shear thinning nature of viscosity holds for all the xanthan solutions, except that the viscosity behavior is different at increasing and decreasing shear rates.…”

Section: -5)mentioning

confidence: 99%

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Viscosity Behavior of Xanthan Solutions Measured as a Function of Shear Rate

Nishinari

Tanaka

Furuse

2015

J. Soc. Rheol., Jpn

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Aqueous solutions of xanthan, which is produced by Xanthomonas campestris, are used as viscosity control agents for various food materials. The viscosity is dependent on the environmental conditions affecting the xanthan macromolecule. Moreover, the viscosity frequently depends on the methods used to measure the shear rate during operation. For practical applications of xanthan solutions, the background of this phenomenon should be made clear. The solutions used in this study were prepared by dissolving xanthan in water or in an aqueous salt solution (NaCl, 1 M). The viscosity was then measured using a rotational viscometer. For the aqueous solution of xanthan, the viscosities measured at increasing shear rates showed shear thickening in the low-shear-rate region. On the other hand, no discrepancy between the behaviors was observed when xanthan was dissolved in the salt solution. This paper discusses the aforementioned viscosity behavior using a dispersion model of polymers with contact sites for the solutions.

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Section: Correlation Between Viscosity Behavior and Solution Structuresupporting

confidence: 89%

Section: Correlation Between Viscosity Behavior and Solution Structurementioning

confidence: 62%

Section: -5)mentioning

confidence: 99%

Section: -5)mentioning

confidence: 99%

See 2 more Smart Citations

Viscosity Behavior of Xanthan Solutions Measured as a Function of Shear Rate

Nishinari

Tanaka

Furuse

2015

J. Soc. Rheol., Jpn

View full text Add to dashboard Cite

show abstract

“…12,13) Recently the Japanese Society of Dysphagia Rehabilitation proposed a new criterion for thickened solutions for elderly patients with swallowing difficulties measured by using a cone-and-plate viscometer at a shear rate of 50 s -1…”

Section: Introductionmentioning

confidence: 99%