Download Pore Structure in Food: Simulation, Measurement and by Alper Gueven, Zeynep Hicsasmaz PDF

By Alper Gueven, Zeynep Hicsasmaz

The pore constitution of meals without delay impacts the good fortune of such foodstuff methods as drying, puffing, freeze-drying, and rehydration. for this reason, the pore constitution of meals determines what sorts of meals strategies will paintings top with a selected nutrition. This short will first talk about extensive the necessity to accurately degree the pore constitution of meals after which will establish and describe intimately the present tools on hand to degree foodstuff porosity. ultimately, it's going to assessment the purposes of those a number of equipment. ​

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Fast Xray tomography analysis of bubble growth and foam setting during breadmaking. Journal of Cereal Science, 43, 393–397. , Rahman, M. , Perera, C. , Smith, B. , & Melton, L. D. (2002). Structural changes in apple rings during convection airdrying with controlled temperature and humidity. Journal of Agricultural and Food Chemistry, 50, 3179–3185. Baik, O. , & Marcotte, M. (2002). Modeling the moisture diffusivity in a baking cake. Journal of Food Engineering, 56, 27–36. , & Tromba, G. (2010).

The classical capillary model assumes the porous medium to be formed of pores with an effective mean pore size. The network model accounts for the interconnectivity of pore segments with various sizes within the limitations of a lattice geometry. , large pore segments are always followed by progressively smaller ones in the direction of intrusion into the network. This is a 1-D network (Fig. 1a) called the straight capillary model. The straight capillary Interconnected pore segments Dead-end pore segments Non-interconnected pore segments Direction of mercury intrusion Direction of mercury intrusion D, µm ΔL µm D, µm (a) (b) Fig.

4). For this purpose, x-coordinate for the center of a D10 capillary segment ð xD10 Þ and its radius, and the x-coordinate for the center of the larger D1 capillary segment ð xD1 ; yD1 Þ are substituted into the equation of a circle and a y-coordinate is calculated: sffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi  2 D1 y ¼ yD1 þ Àð xD10 À xD1 Þ2 ð5:17Þ 2 Then the following condition is checked: y [ yD10 À D10 2 for D1 ð jn ; kn ; ln Þ and y\yD10 þ D10 2 for D1 ð jn ; knþ1 ; ln Þ ð5:18Þ If the above condition is satisfied, D1 and D10/D11 are expected to touch, intersect or overlap, so an iterative procedure has to be applied on D10max until Eq.

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