目的:评估脂蛋白a水平与不同类型痴呆(阿尔茨海默病、路易体痴呆、额颞叶痴呆、帕金森病相关痴呆,血管性痴呆)发生风险之间相关性。方法:采用两样本孟德尔随机化研究方法,通过全基因组关联研究(genome-wide association study,GWAS)汇...目的:评估脂蛋白a水平与不同类型痴呆(阿尔茨海默病、路易体痴呆、额颞叶痴呆、帕金森病相关痴呆,血管性痴呆)发生风险之间相关性。方法:采用两样本孟德尔随机化研究方法,通过全基因组关联研究(genome-wide association study,GWAS)汇总数据集获得与脂蛋白a水平密切相关的遗传位点作为工具变量(IV),分别与不同类型痴呆进行两样本孟德尔随机化(TSMR)分析,以随机效应逆方差加权法(IVW)的结果为主。以MR-Egger法进行多效性分析、留一法进行敏感性分析来验证数据的可靠性。结果:脂蛋白a水平升高与路易体痴呆风险呈正相关(OR=1.68,P=0.0005),和阿尔茨海默病(Alzheimer's disease,AD)的发生呈负相关(OR=0.95,P=0.0027),与血管性痴呆、额颞叶痴呆、帕金森相关痴呆未发现明显相关性。结论:脂蛋白a水平可能与路易体痴呆发病风险呈正相关,可能与阿尔茨海默病发病风险呈负相关,与其它类型痴呆无明显相关性。展开更多
Low temperature coal tar contained a large amount of phenols, aromatic hydrocarbons and alkanes;the separation of phenols from coal tar has a great significance to the deep processing of coal tar. In this work, the se...Low temperature coal tar contained a large amount of phenols, aromatic hydrocarbons and alkanes;the separation of phenols from coal tar has a great significance to the deep processing of coal tar. In this work, the separation of m-cresol from cumene and n-heptane by liquid–liquid extraction using ionic liquids(ILs) as extractants was studied. The suitable ILs were screened by conductor-like screening model for real solvents(COSMO-RS)model and the liquid–liquid phase equilibrium(LLE) experiments were to verify the accuracy of the screening results. The extraction conditions such as extraction time, extraction temperature and mass ratio of ILs to model oils were evaluated. An internal mechanism of the m-cresol extract by ILs was revealed by COSMO-RS calculation and FT-IR. The results showed that the selected ILs can extract m-cresol effectively from cumene and nheptane, 1-ethyl-3-methylimidazolium acetate(emim CH3 COO) was the best extraction solvent. A hydrogen bond between anion of ILs and phenolic hydroxyl groups was observed. M-cresol in model oils could be extracted with extraction efficiencies up to 98.85% at an emim CH3 COO: model oils mass ratio of 0.5 and 298.15 K,emim CH3 COO could be regenerated and reused for 4 cycles without obvious decreases in extraction efficiency and extractant mass.展开更多
文摘目的:评估脂蛋白a水平与不同类型痴呆(阿尔茨海默病、路易体痴呆、额颞叶痴呆、帕金森病相关痴呆,血管性痴呆)发生风险之间相关性。方法:采用两样本孟德尔随机化研究方法,通过全基因组关联研究(genome-wide association study,GWAS)汇总数据集获得与脂蛋白a水平密切相关的遗传位点作为工具变量(IV),分别与不同类型痴呆进行两样本孟德尔随机化(TSMR)分析,以随机效应逆方差加权法(IVW)的结果为主。以MR-Egger法进行多效性分析、留一法进行敏感性分析来验证数据的可靠性。结果:脂蛋白a水平升高与路易体痴呆风险呈正相关(OR=1.68,P=0.0005),和阿尔茨海默病(Alzheimer's disease,AD)的发生呈负相关(OR=0.95,P=0.0027),与血管性痴呆、额颞叶痴呆、帕金森相关痴呆未发现明显相关性。结论:脂蛋白a水平可能与路易体痴呆发病风险呈正相关,可能与阿尔茨海默病发病风险呈负相关,与其它类型痴呆无明显相关性。
基金Supported by the National Key Projects for Fundamental Research and Development of China(2016YFB0600305).
文摘Low temperature coal tar contained a large amount of phenols, aromatic hydrocarbons and alkanes;the separation of phenols from coal tar has a great significance to the deep processing of coal tar. In this work, the separation of m-cresol from cumene and n-heptane by liquid–liquid extraction using ionic liquids(ILs) as extractants was studied. The suitable ILs were screened by conductor-like screening model for real solvents(COSMO-RS)model and the liquid–liquid phase equilibrium(LLE) experiments were to verify the accuracy of the screening results. The extraction conditions such as extraction time, extraction temperature and mass ratio of ILs to model oils were evaluated. An internal mechanism of the m-cresol extract by ILs was revealed by COSMO-RS calculation and FT-IR. The results showed that the selected ILs can extract m-cresol effectively from cumene and nheptane, 1-ethyl-3-methylimidazolium acetate(emim CH3 COO) was the best extraction solvent. A hydrogen bond between anion of ILs and phenolic hydroxyl groups was observed. M-cresol in model oils could be extracted with extraction efficiencies up to 98.85% at an emim CH3 COO: model oils mass ratio of 0.5 and 298.15 K,emim CH3 COO could be regenerated and reused for 4 cycles without obvious decreases in extraction efficiency and extractant mass.
