Behdad Bolouri; Seyed Mohammad Ali Ebrahimzadeh Mousavi; Abdulrasoul Oromiehie; Hassan Lame
Abstract
Sorption of flavor compounds to inner layer of polymer packages and subsequent diffusion results in loss of food flavor and consequently decreases shelf life and consumer acceptance of food stuffs which in turn causes major economic losses, so it is of utmost importance to research on diffusivity of ...
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Sorption of flavor compounds to inner layer of polymer packages and subsequent diffusion results in loss of food flavor and consequently decreases shelf life and consumer acceptance of food stuffs which in turn causes major economic losses, so it is of utmost importance to research on diffusivity of these compounds in polymers to minimize negative effects of this phenomenon. In current research work, artificial neural networks have been applied to model polymer diffusivity to aroma molecules. The model considers all the factors that play a major role in diffusion including environmental factors, aroma molecule structure and polymer structure and is able to provide diffusion coefficient.This model could be used to predict diffusion coefficient of aroma compounds in high density polyethylene packages. Soft drinks extracts, essential oils, fruit concentrates and many other concentrated products are distributed in high density polyethylene packages. The model is able to calculate shelf life and optimum storage conditions of these products. Meanwhile it eliminates high costs involved in measuring diffusion coefficients of aroma compounds. This model at the range of aroma compounds used in this study functions excellent which is the characteristic of modeling using artificial neural networks.
Keywords: Aroma compounds, Artificial Neural Networks, Diffusion Coefficient, Modeling, Permeability, Plastic Packaging
Hossein Mirsaeedghazi; Zahra Emam-Djomeh; Seyed Mohammad Ali Ebrahimzadeh Mousavi; Abdolreza Aroujalian; Mahdi Navidbakhsh
Abstract
The pomegranate juice with high nutritional value has turbid appearance that makes it difficult to preserve and concentrate. Microfiltration is useful process which can clarify it. One of the most important problems in this process is fouling phenomenon which affected by several parameters. The effects ...
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The pomegranate juice with high nutritional value has turbid appearance that makes it difficult to preserve and concentrate. Microfiltration is useful process which can clarify it. One of the most important problems in this process is fouling phenomenon which affected by several parameters. The effects of fluid velocity, transmembrane pressure, membrane type and its pore size on membrane fouling were studied. The results showed that the membrane fouling increased with increase in the fluid velocity and transmembrane pressure. Also, more hydrophilic property and pore size resulted more membrane fouling due to greater flux which move more particles to membrane surface. Scanning electron microscopy (SEM) images support these results.
Keywords: Clarification, Fouling, Membrane, Pomegranate juice
