Influence of sodium bicarbonate and moisture content on physicochemical properties of chicken-based extrudate by
Feiyu Zhang1, Bin Yang2, Min Zhang2
1Anhui Engineering Laboratory for Agro-products Processing, College of Tea & Food Science and Technology, Anhui Agricultural University, Hefei 230036, PR China; Key Laboratory of Meat Processing and Quality Control, Ministry of Education, National Center of Meat Quality and Safety Control, Jiangsu Collaborative Innovation Center of Meat Production and Processing, Quality and Safety Control, College of Food Science and Technology, Nanjing Agricultural University, Nanjing 210095, PR China.
Abstract:
Food extrusion is mostly used for cereal processing. It is necessary to seek a novel technology to develop meat-based extrudates. This study investigated the physicochemical properties of extrudates consisting of 50% chicken and 50% Indica rice flour with different addition of NaHCO3 (0%, 0.25%, 0.50%) and moisture (12%, 14%, 16%). The largest expansion ratio occurred by 0.25% NaHCO3 addition. In the same moisture, the water solubility index increased first and then decreased, while the water absorption index increased with the increase of NaHCO3. With the increase of moisture, the hardness and crispiness of extrudates generally decreased regardless of the addition of NaHCO3. Importantly, at 14% moisture content, with NaHCO3 addition increasing, a more refined cellular structure occurred, sulfide compounds enhanced and the rate of Maillard reaction increased. Summarily, 0.25% NaHCO3 addition with 14% moisture content to assist extrusion had a tremendous potential to improve the quality of chicken-based extrudates.
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