Sophisticated systems for the testing of fibres and advanced materials were showcased by key members of the British Textile Machinery Association(BTMA)at the forthcoming Techtextil 2024 exhibition which takes place in...Sophisticated systems for the testing of fibres and advanced materials were showcased by key members of the British Textile Machinery Association(BTMA)at the forthcoming Techtextil 2024 exhibition which takes place in Frankfurt,Germany,from April 23-26.展开更多
The beyond-dripline oxygen isotopes^(27,28)O were recently observed at RIKEN,and were found to be unbound decaying into^(24)O by emitting neutrons.The unbound feature of the heaviest oxygen isotope,^(28)O,provides an ...The beyond-dripline oxygen isotopes^(27,28)O were recently observed at RIKEN,and were found to be unbound decaying into^(24)O by emitting neutrons.The unbound feature of the heaviest oxygen isotope,^(28)O,provides an excellent test for stateof-the-art nuclear models.The atomic nucleus is a self-organized quantum manybody system comprising specific numbers of protons Z and neutrons N.展开更多
背景:阿尔茨海默病患者存在严重的脑能量障碍,近年来基于酮体干预的脑能量拯救策略在阿尔茨海默病的治疗中越来越受到重视。目的:探讨β-羟基丁酸能否改善β淀粉样蛋白1-42(β-amyloid protein 1-42,Aβ_(1-42))诱导的小鼠海马神经元HT2...背景:阿尔茨海默病患者存在严重的脑能量障碍,近年来基于酮体干预的脑能量拯救策略在阿尔茨海默病的治疗中越来越受到重视。目的:探讨β-羟基丁酸能否改善β淀粉样蛋白1-42(β-amyloid protein 1-42,Aβ_(1-42))诱导的小鼠海马神经元HT22细胞能量障碍。方法:将HT22细胞分为4组,分别为对照组、β-羟基丁酸组、Aβ_(1-42)组、Aβ_(1-42)+β-羟基丁酸组。使用相应试剂盒检测HT22细胞的存活率、ATP水平、α-酮戊二酸脱氢酶活性、Na^(+)K^(+)-ATP酶活性、线粒体膜电位及活性氧水平。结果与结论:与对照组相比,Aβ_(1-42)组HT22细胞的存活率、ATP水平、α-酮戊二酸脱氢酶活性、Na^(+)K^(+)-ATP酶活性、线粒体膜电位均显著降低(P<0.05),活性氧水平显著升高(P<0.05)。与Aβ_(1-42)组相比,Aβ_(1-42)+β-羟基丁酸组HT22细胞的存活率、ATP水平、α-酮戊二酸脱氢酶活性、Na^(+)K^(+)-ATP酶活性、线粒体膜电位均显著升高(P<0.05),活性氧水平显著降低(P<0.05)。结果表明:β-羟基丁酸提高了线粒体生物能量功能和细胞存活率,最终改善了Aβ_(1-42)诱导的HT22细胞能量障碍。展开更多
文摘Sophisticated systems for the testing of fibres and advanced materials were showcased by key members of the British Textile Machinery Association(BTMA)at the forthcoming Techtextil 2024 exhibition which takes place in Frankfurt,Germany,from April 23-26.
基金This work was supported by the National Natural Science Foundation of China(Nos.12335007,11835001,11921006,12035001 and 12205340)the State Key Laboratory of Nuclear Physics and Technology,Peking University(No.NPT2020KFY13)Gansu Natural Science Foundation(No.22JR5RA123).
文摘The beyond-dripline oxygen isotopes^(27,28)O were recently observed at RIKEN,and were found to be unbound decaying into^(24)O by emitting neutrons.The unbound feature of the heaviest oxygen isotope,^(28)O,provides an excellent test for stateof-the-art nuclear models.The atomic nucleus is a self-organized quantum manybody system comprising specific numbers of protons Z and neutrons N.
文摘背景:阿尔茨海默病患者存在严重的脑能量障碍,近年来基于酮体干预的脑能量拯救策略在阿尔茨海默病的治疗中越来越受到重视。目的:探讨β-羟基丁酸能否改善β淀粉样蛋白1-42(β-amyloid protein 1-42,Aβ_(1-42))诱导的小鼠海马神经元HT22细胞能量障碍。方法:将HT22细胞分为4组,分别为对照组、β-羟基丁酸组、Aβ_(1-42)组、Aβ_(1-42)+β-羟基丁酸组。使用相应试剂盒检测HT22细胞的存活率、ATP水平、α-酮戊二酸脱氢酶活性、Na^(+)K^(+)-ATP酶活性、线粒体膜电位及活性氧水平。结果与结论:与对照组相比,Aβ_(1-42)组HT22细胞的存活率、ATP水平、α-酮戊二酸脱氢酶活性、Na^(+)K^(+)-ATP酶活性、线粒体膜电位均显著降低(P<0.05),活性氧水平显著升高(P<0.05)。与Aβ_(1-42)组相比,Aβ_(1-42)+β-羟基丁酸组HT22细胞的存活率、ATP水平、α-酮戊二酸脱氢酶活性、Na^(+)K^(+)-ATP酶活性、线粒体膜电位均显著升高(P<0.05),活性氧水平显著降低(P<0.05)。结果表明:β-羟基丁酸提高了线粒体生物能量功能和细胞存活率,最终改善了Aβ_(1-42)诱导的HT22细胞能量障碍。