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大豆蛋白纤维聚集体的体外消化特性研究
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作者 李益玲 张昱格 +4 位作者 陈映姗 程赛 朱杰 赵雷 陈旭 《食品安全质量检测学报》 CAS 北大核心 2023年第17期9-16,共8页
目的探究大豆蛋白纤维聚集体的体外消化特性。方法以大豆分离蛋白为材料,通过在pH 2.0条件下调控大豆蛋白形成大豆蛋白纤维聚集体。采用标准的静态体外消化模型INFOGEST 2.0对大豆蛋白纤维聚集体进行体外模拟消化实验,并通过十二烷基硫... 目的探究大豆蛋白纤维聚集体的体外消化特性。方法以大豆分离蛋白为材料,通过在pH 2.0条件下调控大豆蛋白形成大豆蛋白纤维聚集体。采用标准的静态体外消化模型INFOGEST 2.0对大豆蛋白纤维聚集体进行体外模拟消化实验,并通过十二烷基硫酸钠-聚丙烯酰胺凝胶电泳(sodium dodecyl sulfate polyacrylamide gel electrophoresis,SDS-PAGE)、动态光散射仪(dynamic light scattering,DLS)及液相色谱-质谱法(liquid chromatography-mass spectrometry,LC-MS)对不同消化时间的胃肠消化产物的分子质量、粒径及肽段组成进行鉴定。结果大豆蛋白纤维聚集体通过消化后被水解为10~15 kDa小分子的肽,其粒径分布由120~800 nm减小至12~120 nm。LC-MS证实消化过程中肽段数量随着消化时间的增加呈阶梯式水解。主成分分析结果显示胃肠消化不同阶段产物组成具有明显的差异性。结论大豆蛋白纤维聚集体在体外模拟消化过程中,在胃/肠阶段中其分子量、粒径及肽段组成均表现出不同的消化行为,这可为大豆产品在消化过程中营养特性的变化提供理论参考。 展开更多
关键词 大豆分离蛋白 纤维聚集体 体外消化特性 INFOGEST 2.0
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代理成本、公司治理与非效率投资 被引量:1
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作者 陈映珊 叶嘉欣 《价值工程》 2019年第30期4-7,共4页
以2004至2018年我国A股上市公司为研究样本,考察了公司内部治理、代理成本对非效率投资的影响。研究结果表明,经理与外部股东的代理冲突所产生的代理成本对过度投资存在显著影响,但代理成本对投资不足的影响不显著;股权治理、董事会治... 以2004至2018年我国A股上市公司为研究样本,考察了公司内部治理、代理成本对非效率投资的影响。研究结果表明,经理与外部股东的代理冲突所产生的代理成本对过度投资存在显著影响,但代理成本对投资不足的影响不显著;股权治理、董事会治理和高管激励总体上未能有效发挥公司治理作用,抑制过度投资。 展开更多
关键词 代理成本 公司治理 过度投资 投资不足
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Prevalence of chronic kidney disease and prediabetes and associated risk factors: a community-based screening in Zhuhai, Southern China 被引量:14
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作者 GU Dong-feng SHI Yan-lin +9 位作者 chen You-mingt LIU Hong-mei DING Ya-nan LIU Xin-yu LI Yong-qiang SHAO Xiao-fei LIANG Yan chen ying-shan YUAN Zhi-yong ZOU He-qun 《Chinese Medical Journal》 SCIE CAS CSCD 2013年第7期1213-1219,共7页
Background The prevalence of chronic kidney disease (CKD) and prediabetes has increased in China, and at different rates in different locations. Therefore a community-based screening research was conducted in order ... Background The prevalence of chronic kidney disease (CKD) and prediabetes has increased in China, and at different rates in different locations. Therefore a community-based screening research was conducted in order to determine the prevalence of CKD and prediabetes, and to analyze associated risk factors of CKD and prediabetes in a city of Southern China.Methods A total of 7801 community residents aged 18 year and older from 6 communities were screened by a stratified random cluster sampling method. An estimated glomerular filtration rate (eGFR), albuminuria, fasting plasma glucose (FPG), and homeostatic model assessment of insulin resistance (HOMA-IR) were measured. Age-standardized prevalence was calculated by the direct method with the use of data on the population distribution in China in 2006. Multivariate logistic analysis was used to analyze the risk factors of CKD and "prediabetes, and association of insulin resistance (IR) with CKD and prediabetes was analyzed.Results The age-standardized prevalence of CKD was 12.5%, eGFR 〈60 ml.min^-1.1.73 m2 was 2.7% and ACR (albumin to creatinine ratio) 〉30 mg/g was 10.3%. The age-standardized prevalence of prediabetes was 12.1%. Logistic regression suggests that IR was a common independent risk factor of CKD and prediabetes. Further analysis show that HOMA-IR was increased with the aggravation of kidney injury and FPG. Conclusion CKD and prediabetes have become a major public health problem in Zhuhai, Southern China; insulin resistance may be an important risk factor. 展开更多
关键词 chronic kidney disease prediabetes homeostatic model assessment of insulin resistance prevalence "community-based screening
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