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6篇 您的检索式:作者名="Mengxi FENG"
    题名 作者 年代 出处 被引量
1Long-term bone and lung consequences associated with hospital-acquired severe acute respiratory syndrome:a 15-year follow-up from a prospective cohort study显示文摘The most severe sequelae after rehabilitation from SARS are femoral head necrosis and pulmonary fibrosis. We performed a 15-year follow-up on the lung and bone conditions of SARS patients. We evaluated the recovery from lung damage and femoral head necrosis in an observational cohort study of SARS patients using pulmonary CT scans, hip joint MRI examinations, pulmonary function tests and hip joint function questionnaires. Eighty medical staff contracted SARS in 2003. Two patients died of SARS, and78 were enrolled in this study from August 2003 to March 2018. Seventy-one patients completed the 15-year follow-up. The percentage of pulmonary lesions on CT scans diminished from 2003(9.40 ± 7.83)% to 2004(3.20 ± 4.78)%(P < 0.001) and remained stable thereafter until 2018(4.60 ± 6.37)%. Between 2006 and 2018, the proportion of patients with interstitial changes who had improved pulmonary function was lower than that of patients without lesions, as demonstrated by the one-second ratio(FEV1/FVC%, t = 2.21, P = 0.04) and mid-flow of maximum expiration(FEF25%–75%, t = 2.76, P = 0.01). The volume of femoral head necrosis decreased significantly from 2003(38.83 ± 21.01)% to 2005(30.38 ± 20.23)%(P = 0.000 2), then declined slowly from 2005 to 2013(28.99 ± 20.59)% and plateaued until 2018(25.52 ± 15.51)%. Pulmonary interstitial damage and functional decline caused by SARS mostly recovered, with a greater extent of recovery within 2 years after rehabilitation. Femoral head necrosis induced by large doses of steroid pulse therapy in SARS patients was not progressive and was partially reversible.Peixun Zhang Jia Li Huixin Liu Na Han Jiabao Ju Yuhui Kou Lei Chen Mengxi Jiang Feng Pan Yali Zheng Zhancheng Gao Baoguo Jiang 2020Bone Research2020,8,1:8
2Rice productivity and profitability with slow-release urea containing organic-inorganic matrix materials显示文摘Applying slow-release fertilizers is possible means for reducing nitrogen(N) loss in rice production. Matrix-based fertilizers represent novel slow-release fertilizers. To date, there is little consensus about the effect of combined addition of organic and inorganic matrix materials on rice production. We developed a slow-release urea fertilizer with selected organic and inorganic matrix materials. The study aimed to: i) determine the effect of the slow-release urea on rice yield, profit, and agronomic efficiency and ii) elucidate its possible mechanisms. A two-year field experiment was conducted during 2015–2016. Besides,laboratory experiments were conducted to determine the potential N loss risk. Three treatments were set up: control without N application(CK), regular urea treatment(RU, 150 kg N ha^(-1)), and slow-release urea treatment(SU, 150 kg N ha^(-1)). The results showed that rice biomass and grain yield were significantly higher in SU than in RU(P < 0.05). The higher panicle density in SU was largely responsible for the greater grain yield. Net profit in SU was US$450 ha^(-1), higher than in RU. Agronomic efficiency was significantly greater in SU than in RU(P < 0.05). Rice height, root area, leaf chlorophyll, leaf nitrate reductase activity, and leaf glutamine synthetase activity were larger in SU than in RU. Less N loss and greater soil N availability were partly responsible for the improvements in rice growth traits and physiological parameters in SU. Overall, the slow-release urea is a promising fertilizer for rice production.Yang YANG Binmei LIU Xiaoyu NI Liangzhi TAO Lixiang YU Ye YANG Mengxi FENG Wenjin ZHONG Yuejin WU 2021Pedosphere2021,31,4:5
3Distinct immune signatures discriminate between asymptomatic and presymptomatic SARS-CoV-2^(pos)subjects显示文摘Increasing numbers of SARS-CoV-2-positive(SARS-CoV-2^(pos))subjects are detected at silent SARS-CoV-2 infection stage(SSIS).Yet,SSIS represents a poorly examined time-window wherein unknown immunity patterns may contribute to the fate determination towards persistently asymptomatic or overt disease.Here,we retrieved blood samples from 19 asymptomatic and 12 presymptomatic SARS-COV-2^(pos)subjects,47 age/gender-matched patients with mild or moderate COVID-19 and 27 normal subjects,and interrogated them with combined assays of 44-plex CyTOF,RNA-seq and Olink.Notably,both asymptomatic and presymptomatic subjects exhibited numerous readily detectable immunological alterations,while certain parameters including more severely decreased frequencies of CD107a^(low)classical monocytes,intermediate monocytes,non-classical monocytes and CD62L^(hi)CD8^(+)Tnaive cells,reduced plasma STC1 level but an increased frequency of CD4^(+)NKT cells combined to distinguish the latter.Intercorrelation analyses revealed a particular presymptomatic immunotype mainly manifesting as monocytic overactivation and differentiation blockage,a likely lymphocyte exhaustion and immunosuppression,yielding mechanistic insights into SSIS fate determination,which could potentially improve 5ARS-CoV-2 management.Shanhe Yu Caixia Di Shijun Chen Mingquan Guo Jiayang Yan Zhaoqin Zhu Li Liu Ruixue Feng Yinyin Xie Ruihong Zhang Juan Chen Mengxi Wang Dong Wei Hai Fang Tong Yin Jinyan Huang Saijuan Chen Hongzhou Lu Jiang Zhu Jieming Qu 2021Cell Research2021,31,11:4
4Monitoring the Amery Ice Shelf front during 2004-2012 using ENVISAT ASAR data显示文摘The Amery Ice Shelf is the largest ice shelf in East Antarctica. It drains continental ice from an area of more than one million square kilometres through a section of coastline that represents approximately 2% of the total circumference of the Antarctic continent. In this study, we used a time series of ENVISAT ASAR images from 2004-2012 and flow lines derived from surface velocity data to monitor the changes in 12 tributaries of the Amery Ice Shelf front. The results show that the Amery Ice Shelf has been expanding and that the rates of expansion differ across the shelf. The highest average annual rate of advance from 2004-2012 was 3.36 m·d-1 and the lowest rate was 1.65 m·d-1 . The rates in 2009 and 2010 were generally lower than those in other years. There was a low correlation between the rate of expansion and the atmospheric temperature recorded at a nearby research station, however the mechanism of the relationship was complex. This study shows that the expansion of the Amery Ice Shelf is slowing down, reflecting a changing trend in climate and ice conditions in East Antarctica.ZHAO Chen CHENG Xiao HUI Fengming KANG Jing LIU Yan WANG Xianwei WANG Fang CHENG Cheng FENG Zhunzhun CI Tianyu ZHAO Tiancheng ZHAI Mengxi 2013Advances in Polar Science2013,24,2:4
5A universal etching-free transfer of MoS2 films for applications in photodetectors显示文摘从生长底层转移瞬间 2 电影到目标底层上是为他们的实际应用的一个关键问题。而且,避免样品降级和底层破坏仍然是大挑战,因为当前的转移方法不可避免地采用蚀刻的湿化学药品,处理。我们为由使用 ultrasonication 转移瞬间 2 电影到任意的底层上开发了一个蚀刻免费的转移方法。简短,在在聚合物涂的瞬间 2 之间的接口的产生 ultrasonication 的 microbubbles 的倒塌电影和底层导致足够的力量到 delaminate 瞬间 2 电影。用这个方法,瞬间 2 电影能从所有底层(硅石,云母,锶 titanate,和蓝宝石) 被转移并且保留原来的样品形态学和质量。这个方法保证一个简单转移过程并且允许生长底层的复用,没有包含任何危险蚀刻剂。蚀刻免费的转移方法是可能的在光电探测器支持瞬间 2 的宽广应用程序。Donglin Ma Jianping Shi Qingqing Ji Ke Chen Jianbo Yin Yuanwei Lin Yu Zhang Mengxi Liu Qingliang Feng Xiuju Song Xuefeng Guo Jin Zhang Yanfeng Zhang Zhongfan Liu 2015Nano Research2015,8,11:1
6Sealing functional ionic liquids in conjugated microporous polymer membrane by solvent-assisted micropore tightening显示文摘Porous organic polymers hold great promise for molecular sieving membrane separation.Although the inclusion of functional ionic liquid(IL)in the pores offers a facile way to manipulate their separation properties,the IL leaching during the separation process is difficult to avoid.Herein,we report a strategy to in-situ encapsulate ILs into the micropores of the conjugated microporous polymer membrane via a 6-min electropolymerization and further seal the aperture of the pores to prevent ILs leaching by solvent-assisted micropore tightening(SAMT).Upon screening the binding energy between different ILs and gas molecules,two ILs were selected to be incorporated into the membrane for CO_(2)/CH_(4) and O_(2)/N_(2) gas separations.The resultant separation performances surpass the 2008 Robeson upper bound.Notably,the ILs can be locked in the micropores by a facile high surface tension solvent treatment process to improve their separation stability,as evidenced by a 7-day continuous test.This simple and controllable process not only enables efficient and steady separation performance but also provides an effective strategy for confining and sealing functional guest molecules in the porous solids for various applications.Mengxi Zhang Anke Yu Xiangyu Wu Pengpeng Shao Xin Huang Dou Ma Xianghao Han Jing Xie Xiao Feng Bo Wang 2022Nano Research2022,15,3:0
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