Effect of pH and salts on microstructure and viscoelastic properties of lemon peel acid insoluble fiber suspensions upon high pressure homogenization

Abstract

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Effects of different moisture contents on the structural and functional properties of cellulose with cell wall components in different citrus fibres

“…The washing solvents also showed a significant impact on the rheological parameters ( G ′ and G ′′), where washing with just water (CFS1) showed lower values as compared to a mixture of water and alcohol (CFS4). This indicates that a mixture of water and alcohol significantly decreases the insoluble components of both water and alcohol from the citrus fibres resulting in higher G ′ and G ′′ values as compared to washing with just water (similar behaviour was observed with the reduced pectin content via washing by Viuda-Martos et al (2012) 28 and Willemsen et al (2018) 21 ). However, no significant difference was observed with the WRC when comparing the two washing processes (Fig.…”

“…Cellulose microfibres have been observed to exhibit gel-like viscoelastic properties ( G ′ > G ′′) as well as pseudoplastic and time-dependent thixotropic behaviour. 9,17–21 The highly entangled fibre network of cellulosic materials enables sufficient room for the uptake and retention of water, which provides these gel-like properties. 17 Research on the shear viscosity of citrus fibres has demonstrated the dependence of shear viscosity on the citrus fibre microstructure.…”

“…Pectins have been shown to decrease after washing and drying, which has been observed to increase the viscoelastic behaviour of the citrus fibres. 21,28 Depending on the drying process, cellulose fibres may become irreversibly (or partially irreversibly) agglomerated, which can affect their functionality upon rehydration. 29,30…”

Microstructural and Texturizing Properties of Partially Pectin-Depleted Cell Wall Material: The Role of Botanical Origin and High-Pressure Homogenization

“…Relevant viscoelastic properties of the suspension were determined by oscillatory rheological analysis performed with a stress-controlled rheometer (MCR 302, Anton Paar, Graz, Austria). The analysis was based on the method of Willemsen et al [34] and was performed with the concentric cylinder system (2 mm gap), with rough surfaces designed and used by Willemsen et al [34]. After loading the suspension, a pre-shear was performed for 1 min at 10 s −1 , followed by 1 min of rest.…”

The role of mechanical collapse by cryogenic ball milling on the effect of high-pressure homogenization on the microstructural and texturizing properties of partially pectin-depleted tomato cell wall material

“…In short, the rheological analysis (MCR 302, Anton Paar, Graz, Austria) consisted of a sequence of steps and made use of the rough concentric cylindric geometry designed by Willemsen et al (2018). When the suspension was loaded, a pre-shear (10 s -1 ) was applied for 1 min.…”