Study the Effect of Konjac Gum (Amorphophallus konjac) as a Fat Substitute on the Physico-Chemical, Rheological and Sensory Properties of Low-Fat Mayonnaise
This study was carried out to determine the effect of using konjac gum as a fat substitute on the physico-chemical, rheological and sensory properties of low-fat mayonnaise. For this purpose, different concentrations (0.5, 1 and 1.5%) of konjac gum were added to the mayonnaise, and the amount of oil in the formulation was reduced by half. In this study, ash, protein, fat, moisture, pH, acidity, texture, apparent viscosity, emulsion stability, color evaluation and sensory evaluation were investigated and compared with low fat (reduced oil and without gum) and high fat (commercial mayonnaise) cream as control samples The results showed that the replacement of konjac gum significantly caused a decrease in the syneresis amount compared to the low-fat control sample. Texture firmness and apparent viscosity significantly increased with increasing gum, while the sample containing 1% konjac was similar to high fat control sample. Also, the results of sensory evaluation showed that panelists did not differentiate between samples containing konjac and high fat control sample. Therefore, it can be concluded that konjac gum at 1% can be used as a fat substitute for the preparation of low-fat mayonnaise due to its favorable physicochemical properties and acceptable texture and flavor.
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