Rheological measurements were carried out using a HAAKE RheoStress 6000 rheometer (Thermo Scientific, Waltham, MA, USA) with a P60 TiL parallel plate. The temperature was maintained at 25 ± 0.1 °C. To investigate the effects of concentration on rheological behavior of pectin, solutions of different concentrations including 0.5%, 1.0%, 1.5% (w/v) were prepared with deionized water and placed at room temperature for 24 h before use.
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