Characterization of the consistency of gruels consumed by infants in developing countries: assessment of the Bostwick consistometer and comparison with viscosity measurements and sensory perception

Mouquet, Claire; Greffeuille, Valérie; Trèche, Serge

doi:10.1080/09637480600931618

Cited by 31 publications

(41 citation statements)

References 6 publications

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“…Each treatment was evaluated three times by each panellist. The most acceptable porridges were standardized by a Bostwick Consistometer (Mouquet et al, 2006) and their nutrient composition analysed.…”

Section: Sensory Evaluationmentioning

confidence: 99%

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Improving the nutritional value of traditional finger millet porridges for children aged 7-24 months in Bujenje County of Western Uganda

Isingoma¹,

Samuel²,

Edward³

et al. 2015

Afr. J. Food Sci.

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Child malnutrition is a major problem in Western Uganda where finger millet porridges are commonly used as complementary foods. This study aimed at improving the nutritional value and safety of finger millet porridges using Moringa oleifera, Cucurbita maxima and lactic acid fermentation. Proximate analysis, iron, zinc and vitamin A contents of composite flours was done according to AOAC methods while agar diffusion pouring technique and a seven point hedonic scale were used to analyse antimicrobial and organoleptic properties of the improved millet porridges, respectively. The porridges were developed with the aim of catering for at least 60% daily requirements for protein, vitamin A, iron and zinc for children aged 7-24 months. They were fermented using lactic acid starter cultures. Chisquare tests were used for comparing percentage acceptance of the porridges by mothers. Analysis of variance was carried out and differences among means were compared by Duncan's test at p<0.05. Fermented millet porridge with 7% M. oleifera leaves had the best nutrient composition and antimicrobial properties while fermented millet porridge with 17% C. maxima flesh was more acceptable by mothers. The porridges are thus a potential solution to inadequate nutrient intakes and diarrhoeal infections attributed to child malnutrition in Western Uganda and most developing countries.

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Section: Sensory Evaluationmentioning

confidence: 99%

“…The porridges were cooled to 40°C, the recommended temperature for young children. The flow distance of the porridges was measurement by a Bostwick consistometer in triplicate (Mouquet et al, 2006).…”

Section: Viscosity Of the Acceptable Formulated Porridgesmentioning

confidence: 99%

Improving the nutritional value of traditional finger millet porridges for children aged 7-24 months in Bujenje County of Western Uganda

Isingoma¹,

Samuel²,

Edward³

et al. 2015

Afr. J. Food Sci.

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“…Theorem 4.4. For any δ > 0, define the singular mass 21) with s denoting the shock speed. Then the growth rate satisfies…”

Section: )mentioning

confidence: 99%

“…Introduction. The flow of thin viscous suspension with particles has important application in science and industry, such as the Bostwick consistometer in the food industry [21] and spiral separator in the mining industry [18]. However, the continuum description of it is complicated due to the interplay of different physical effects including the increase of viscosity in the presence of particles [30,4], the settling of heavy particles due to gravity [12], and particle resuspension induced by shear [19,1].…”

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confidence: 99%

Shock Solutions for High Concentration Particle-Laden Thin Films

Wang¹,

Bertozzi²

2014

SIAM J. Appl. Math.

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Abstract. We study the shock dynamics for a recently proposed system of conservation laws (Murisic et. al [J. Fluid Mech. 2013]) describing gravity-driven thin film flow of a suspension of negatively buoyant particles down an incline. When the particle concentration is above a critical value, singular shock solutions can occur. We analyze the Hugoniot topology associated with the Riemann problem for this system, describing in detail how the transition from a double shock to a singular shock happen. We also derive the singular shock speed based on a key observation that the particles pilling up at the maximum packing fraction near the contact line.Key words. thin film, Riemann problem, conservation laws, singular shock AMS subject classifications. 35L65 35L67 74K351. Introduction. The flow of thin viscous suspension with particles has important application in science and industry, such as the Bostwick consistometer in the food industry [21] and spiral separator in the mining industry [18]. However, the continuum description of it is complicated due to the interplay of different physical effects including the increase of viscosity in the presence of particles [30,4], the settling of heavy particles due to gravity [12], and particle resuspension induced by shear [19,1]. Only recent studies have centered on particle-laden thin films down an incline with a free surface and moving contact lines.Zhou et al.[32] first derived a theory for shock dynamics by considering a gravitydriven film of a dense suspension of glass beads in oil with conserved volume. Three different regimes were observed depending on the inclination angle and initial particle concentration. At low inclination angles and concentrations, particles settle out of the flow leading to the stratification of the suspension with a clear fluid moving ahead of the particles; at intermediate angles and concentrations, the suspension stays wellmixed; and at high concentrations and inclination angles the particles concentrate at the contact line to form a particle-rich ridge. To model the problem, they treat the mixture as a Newtonian flow locally, and describe the two-phase flow by a depthaverage velocity depending on the effective viscosity of the suspension together with a relative velocity coming from the hindered settling. Shock solutions are obtained with an observation that the classical solution might cease to exist if the precursor thickness is smaller than a critical value. Cook et al. [8] revisited this model with a more complete explanation and more thorough characterization of the shocks solutions. A singular shock is expected without further analysis, and they observe that for this singular shock, the particle concentration exceeds the limits of the close packing, making the model invalid in high concentrations. Cook [7] later developed a model to identify a balance between hindered settling and shear-induced migration at the leading order in large scale physics for particle-liquid separation.Intensive experiments were carried out in [29] and [22]....

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“…The modeling of gravity-driven particle-laden flow is of interest in the context of geological phenomena such as mudslides, and industrial applications such as food science [1,2]. This paper compares the behavior of a constantmass particle-laden fluid flow down an incline with a pure fluid flow.…”

Section: Introductionmentioning

confidence: 99%

Self-similarity in particle-laden flows at constant volume

et al. 2009

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This paper deals with the evolution of a localized, constant-volume initial condition on an incline into a spreading descending thin-film solution. Clear fluids in this geometry are known to have a front position that moves according to a t 1/3 scaling law, based on similarity-solution analysis by Huppert (Nature 300: [427][428][429] 1982). The same dynamics are investigated for particle-laden flow using a recently proposed lubrication model and physical experiments. The analysis includes the role of a precursor in the model. In the lubrication model, the height of the precursor significantly influences the position of the fluid front, independent of particles settling in the direction of flow. By comparing theory with experiments it is shown that the t 1/3 scaling law persists, to leading order, for particle-laden flows with particle settling. However, additional physics is needed in the existing lubrication models to quantitatively explain departures from clear-fluid self-similarity due to particle settling.

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Characterization of the consistency of gruels consumed by infants in developing countries: assessment of the Bostwick consistometer and comparison with viscosity measurements and sensory perception

Cited by 31 publications

References 6 publications

Improving the nutritional value of traditional finger millet porridges for children aged 7-24 months in Bujenje County of Western Uganda

Improving the nutritional value of traditional finger millet porridges for children aged 7-24 months in Bujenje County of Western Uganda

Shock Solutions for High Concentration Particle-Laden Thin Films

Self-similarity in particle-laden flows at constant volume

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