| 2 | Preparation,Structure,and Properties of Flexible Polyurethane Foams Filled with Fumed Silica显示文摘Flexible polyurethane (PU) foams with different load-ing mass fraction (0%-2.0%) of fumed silica were synthesized by free-rising foaming method. The addition of 1.4% fumed silica makes the cells diffuse more uniform in the PU foam and the temperature of degradation occurring with a maximum weight loss rate is about 7℃ higher than that of pure PU foam. Most signifi-cantly,the sound absorption peaks of the filled PU foams shift to the low frequency region (from 997 Hz to 711 Hz) with increasing fumed silica content (0%-2.0%). The average sound absorption coefficients of filled PU foams increase except the content of 0.35% fumed silica. The experimental results show that flexible PU foams filled with fumed silica have excellent sound absorption characteristics in low-frequency regions. | LIU Ting MAO Liangliang LIU Fuwei JIANG Wuzhou HE Zhaobo FANG Pengfei | 2011 | Wuhan University Journal of Natural Sciences2011，16，1： | 0 |
| 3 | Clinical effects of the combination of Traditional Chinese and Western Medicines on coronavirus disease 2019:a systematic review and Meta-analysis显示文摘OBJECTIVE:To explore the clinical efficacy of the combination of Traditional Chinese and Western Medicines for the treatment of coronavirus disease2019(COVID-19).METHODS:Studies were identified in six popular medical databases.RESULTS:Thirteen studies were included.The results showed that combined treatment with Traditional Chinese and Western Medicines can reduce the probability of progression from mild to severe disease[RR=0.34,95%confidence interval(CI)(0.18,0.65)](P=0.001)and improve the clinical cure rate[RR=0.17,95%CI(0.05,0.28)](P=0.004).The use of an integrated treatment strategy shortened the time to the remission of fever[WMD=-1.27,95%CI(-1.67,-0.92)](P<0.001)and improved the incidences of the disappearance of fever and fatigue[RR=1.25,95%CI(1.06,1.47)(P=0.007);RR=1.49,95%CI(1.13,1.97)(P=0.004)].CONCLUSION:A combined treatment strategy is effective for COVID-19. | YAN Lizhao MAO Fuwei CAO Yinghao XIE Mao | 2021 | Journal of Traditional Chinese Medicine2021，41，4： | 0 |
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