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Incorporation of modified okara-derived insoluble soybean fiber into set-type yogurt : structural architecture, rheological properties and moisture stability

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Abstract
In the present work, modified okara-derived insoluble soybean fiber (ISF) was incorporated into set-type yogurt to investigate its effect on structure, rheological properties and moisture stability. Low concentrations (0.25% and 0.50%, w/v) of ISF induced a more homogeneous network structure with embedded pores or cavities compared to plain set-type yogurt. At high concentrations (0.75%, 1.00% and 1.25%, w/v), a unique structure of ISF attached to aggregated casein micelles was formed. Oscillation time sweep indicated the onset of the casein micelle network appeared earlier as the ISF concentration increased from 0% to 0.50% and then became later as it continued to increase to 1.25%. Rheological measurements showed that the addition of ISF reinforced the structural strength of the yogurt gel to cope with the applied stress, and the consistency index (Pa center dot s(n)) fitted by flow curves increased significantly (p < 0.05) from 11.79 to 51.14 at 1.25% ISF addition. Furthermore, the values of the storage modulus and apparent viscosity were dependent on the addition of higher concentrations of ISF, which was related to the viscos and viscoelastic properties of ISF in the aqueous phase. The yogurt gel matrix bound more tightly to water and also exhibited significantly (p < 0.05) higher water holding capacity than the plain yogurt in the case of centrifugation (1000 g, 20 min), up to 84.5%. This study confirms the benefits of ISF in fortifying yogurt and has important implications for the production of the fiber-rich 'clean label' set-type yogurt.
Keywords
DIETARY FIBER, MYOFIBRILLAR PROTEIN, SENSORY PROPERTIES, MICROSTRUCTURE, CASEIN, SEPARATION, IMPACT, MILK, GELS, Insoluble soybean fiber, Set-type yogurt, Microstructure, Rheology, Moisture stability

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MLA
Chen, Bifen, et al. “Incorporation of Modified Okara-Derived Insoluble Soybean Fiber into Set-Type Yogurt : Structural Architecture, Rheological Properties and Moisture Stability.” FOOD HYDROCOLLOIDS, vol. 137, 2023, doi:10.1016/j.foodhyd.2022.108413.
APA
Chen, B., Zhao, X., Cai, Y., Jing, X., Zhao, M., Zhao, Q., & Van der Meeren, P. (2023). Incorporation of modified okara-derived insoluble soybean fiber into set-type yogurt : structural architecture, rheological properties and moisture stability. FOOD HYDROCOLLOIDS, 137. https://doi.org/10.1016/j.foodhyd.2022.108413
Chicago author-date
Chen, Bifen, Xiujie Zhao, Yongjian Cai, Xuelian Jing, Mouming Zhao, Qiangzhong Zhao, and Paul Van der Meeren. 2023. “Incorporation of Modified Okara-Derived Insoluble Soybean Fiber into Set-Type Yogurt : Structural Architecture, Rheological Properties and Moisture Stability.” FOOD HYDROCOLLOIDS 137. https://doi.org/10.1016/j.foodhyd.2022.108413.
Chicago author-date (all authors)
Chen, Bifen, Xiujie Zhao, Yongjian Cai, Xuelian Jing, Mouming Zhao, Qiangzhong Zhao, and Paul Van der Meeren. 2023. “Incorporation of Modified Okara-Derived Insoluble Soybean Fiber into Set-Type Yogurt : Structural Architecture, Rheological Properties and Moisture Stability.” FOOD HYDROCOLLOIDS 137. doi:10.1016/j.foodhyd.2022.108413.
Vancouver
1.
Chen B, Zhao X, Cai Y, Jing X, Zhao M, Zhao Q, et al. Incorporation of modified okara-derived insoluble soybean fiber into set-type yogurt : structural architecture, rheological properties and moisture stability. FOOD HYDROCOLLOIDS. 2023;137.
IEEE
[1]
B. Chen et al., “Incorporation of modified okara-derived insoluble soybean fiber into set-type yogurt : structural architecture, rheological properties and moisture stability,” FOOD HYDROCOLLOIDS, vol. 137, 2023.
@article{01GYHMYGAW3CMXCC0XNN9JMJEF,
  abstract     = {{In the present work, modified okara-derived insoluble soybean fiber (ISF) was incorporated into set-type yogurt to investigate its effect on structure, rheological properties and moisture stability. Low concentrations (0.25% and 0.50%, w/v) of ISF induced a more homogeneous network structure with embedded pores or cavities compared to plain set-type yogurt. At high concentrations (0.75%, 1.00% and 1.25%, w/v), a unique structure of ISF attached to aggregated casein micelles was formed. Oscillation time sweep indicated the onset of the casein micelle network appeared earlier as the ISF concentration increased from 0% to 0.50% and then became later as it continued to increase to 1.25%. Rheological measurements showed that the addition of ISF reinforced the structural strength of the yogurt gel to cope with the applied stress, and the consistency index (Pa center dot s(n)) fitted by flow curves increased significantly (p < 0.05) from 11.79 to 51.14 at 1.25% ISF addition. Furthermore, the values of the storage modulus and apparent viscosity were dependent on the addition of higher concentrations of ISF, which was related to the viscos and viscoelastic properties of ISF in the aqueous phase. The yogurt gel matrix bound more tightly to water and also exhibited significantly (p < 0.05) higher water holding capacity than the plain yogurt in the case of centrifugation (1000 g, 20 min), up to 84.5%. This study confirms the benefits of ISF in fortifying yogurt and has important implications for the production of the fiber-rich 'clean label' set-type yogurt.}},
  articleno    = {{108413}},
  author       = {{Chen, Bifen and  Zhao, Xiujie and Cai, Yongjian and  Jing, Xuelian and  Zhao, Mouming and  Zhao, Qiangzhong and Van der Meeren, Paul}},
  issn         = {{0268-005X}},
  journal      = {{FOOD HYDROCOLLOIDS}},
  keywords     = {{DIETARY FIBER,MYOFIBRILLAR PROTEIN,SENSORY PROPERTIES,MICROSTRUCTURE,CASEIN,SEPARATION,IMPACT,MILK,GELS,Insoluble soybean fiber,Set-type yogurt,Microstructure,Rheology,Moisture stability}},
  language     = {{eng}},
  pages        = {{11}},
  title        = {{Incorporation of modified okara-derived insoluble soybean fiber into set-type yogurt : structural architecture, rheological properties and moisture stability}},
  url          = {{http://doi.org/10.1016/j.foodhyd.2022.108413}},
  volume       = {{137}},
  year         = {{2023}},
}

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