参考资料:1. Luping Wang, Longfei Guo, Kaiqiang Zhang, Yuguo Xia, Jingcheng Hao, Xu Wang*. Development of Tough Thermoplastic Elastomers by Leveraging Rigid–Flexible Supramolecular Segment Interplays. Angew. Chem. Int. Ed. 2023, e202301762.
如果把智能系统比作“人”,那么传感器就是“人”的感觉器官。不同类型的传感器,感知周围环境并把数据传递给系统进行计算,对情况进行实时分析、判断和应对。随着数字化智能化不断深入,各式各样传感器的用武之地大为拓宽,为人类创造美好生活发挥着巨大作用。
据最新一期《美国化学学会杂志》报道,美国西北大学团队利用快速移动的“跳舞分子”修复受损的人类软骨细胞。该疗法可在短短4小时内激活再生软骨所需的基因表达。而且,仅仅3天后,人类细胞就产生了软骨再生所需的蛋白质成分。研究人员还发现,随着分子运动的增加,治疗的有效性也随之增加。
Abstract:The identification of sources driving cosmic reionization, a major phase transition from neutral hydrogen to ionized plasma around 600–800 Myr after the Big Bang, has been a matter of debate. Some models suggest that high ionizing emissivity and escape fractions from quasars support their role in driving cosmic reionization. Others propose that the high fesc values from bright galaxies generate sufficient ionizing radiation to drive this process. Finally, a few studies suggest that the number density of faint galaxies, when combined with a stellar-mass-dependent model of ionizing efficiency and fesc, can effectively dominate cosmic reionization. However, so far, comprehensive spectroscopic studies of low-mass galaxies have not been done because of their extreme faintness. Here we report an analysis of eight ultra-faint galaxies during the epoch of reionization with absolute magnitudes between MUV ≈ −17 mag and −15 mag . We find that faint galaxies during the first thousand million years of the Universe produce ionizing photons with log= 25.80±0.14, a factor of 4 higher than commonly assumed values. If this field is representative of the large-scale distribution of faint galaxies, the rate of ionizing photons exceeds that needed for reionization, even for escape fractions of the order of 5%.
近日,北京师范大学化学学院杨清正教授课题组研究成果以“A host–guest strategy for converting the photodynamic agents from a singlet oxygen generator to a superoxide radical generator†”为题,发表于英国皇家化学会旗舰刊Chemical Science。
来源:中国新闻网 中新网杭州1月10日电(鲍梦妮)1月9日,2024年度浙江“九三榜样颁奖仪式”在杭州举行。周明耀、汪爱英、谢聪颖、齐洋、吴宗大、黄小明、何道根、应刚秋、黄飞鹤、谢丽泓10位锐意进取、担当作为的九三学社社员得到表彰。