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Pickering高內(nèi)相乳液制備及其穩(wěn)定性與消化特性研究
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黑龍江省百千萬工程重大專項(2019ZX08B01-03)和山東省重點研發(fā)計劃項目(2019JZZY010722)


Stability and Digestion Characteristics of Pickering High Internal Phase Emulsion Formed by 7S and 11S
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    摘要:

    利用大豆球蛋白(11S)和β-伴大豆球蛋白(7S)在酸性條件下制備Pickering高內(nèi)相乳液,通過粒徑、ζ-電位、傅里葉紅外光譜(FITR)、冷凍掃描電鏡、乳化性和流變學(xué)等研究其穩(wěn)定性,并探討其消化特性。結(jié)果表明:在pH值2.0時,7S和11S形成的乳液均具有較高的乳化活性和乳化穩(wěn)定性,11S比7S具有更高乳化性能。當(dāng)?shù)鞍踪|(zhì)量濃度為0.015g/mL,油相體積分?jǐn)?shù)為78%~82%時,可以形成穩(wěn)定的高內(nèi)相乳液。通過增加內(nèi)相體積分?jǐn)?shù),7S和11S蛋白顆粒穩(wěn)定的Pickering乳液體系分布更加均勻,不易發(fā)生聚集,并且可以形成較強的凝膠網(wǎng)絡(luò)結(jié)構(gòu)。模擬體外消化實驗表明,在酸性條件下,蛋白形成的高內(nèi)相乳液可以不同程度地延遲脂質(zhì)的釋放。本研究明晰了在酸性條件下7S和11S的結(jié)構(gòu)特性以及7S和11S高內(nèi)相乳液在胃腸道中的消化行為,可為食品功能性成分遞送體系研究提供理論支撐。

    Abstract:

    Pickering high internal phase emulsion was prepared by using soybean globulin (11S) and soy β-conglycinin (7S) under acidic conditions. The stability of the emulsion was studied by particle size, potential, Fourier transform infrared spectroscopy(FITR), freeze scanning electron microscopy, optical microscopy and rheology, and its digestion characteristics were also discussed. The results showed that when pH value was 2.0, the emulsion formed by 7S and 11S had higher emulsifying activity and emulsifying stability, and 11S had higher hydrophobicity and emulsifying property than 7S. When the protein concentration was 0.015g/mL and the volume fraction of oil phase was 78%~82%, stable high internal phase emulsion can be formed. By increasing the volume fraction of the internal phase, the emulsion system with stable 7S and 11S protein particles distributed more evenly and was not easy to aggregate, which enhanced the formation of gel network. Compared with 7S stabilized Pickering high internal phase emulsion, 11S formed a stronger gel network structure with stronger gel strength and more stable emulsion system. Simulated in vitro digestion experiments showed that under acidic conditions, the particle size and potential value of the emulsion were lower, and the fat release was less. The high internal phase emulsion formed by the protein could delay the release of lipid to varying degrees. The research result clearly identified the structural characteristics of 7S and 11S under acidic conditions and the digestive behavior of stable high internal phase emulsions in gastrointestinal tract, and provided theoretical support for the research and development of food functional ingredient delivery system.

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江連洲,孫遠達,鐘明明,趙曉明,謝鳳英,齊寶坤. Pickering高內(nèi)相乳液制備及其穩(wěn)定性與消化特性研究[J].農(nóng)業(yè)機械學(xué)報,2021,52(10):417-424. JIANG Lianzhou, SUN Yuanda, ZHONG Mingming, ZHAO Xiaoming, XIE Fengying, QI Baokun. Stability and Digestion Characteristics of Pickering High Internal Phase Emulsion Formed by 7S and 11S[J]. Transactions of the Chinese Society for Agricultural Machinery,2021,52(10):417-424.

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  • 收稿日期:2021-03-23
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  • 在線發(fā)布日期: 2021-04-27
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