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| 1 | Differences of the oxidation process and secondary organic aerosol formation at low and high precursor concentrations显示文摘Current atmospheric quality models usually underestimate the level of ambient secondary organic aerosol(SOA), one of the possible reasons is that the precursors at different concentrations may undergo different oxidation processes and further affect SOA formation. Therefore, there is a need to perform more chamber studies to disclose the influence. In this work, SOA formation over a wide range of initial precursor concentrations(tens of ppb to hundreds of ppb levels) was investigated in a 30 m3 indoor smog chamber,and mainly through the analysis of multiple generations of VOCs detected from HR-To FPTRMS to expound the difference in the oxidation process between low and high precursor concentrations. Compared to high initial concentrations, gas-phase intermediates formed at low concentrations had a higher intensity by about one order of magnitude, and the lowvolatility compounds also had a higher formation potential due to the competition between semi-volatile intermediates and precursors with oxidants. In addition, the formed SOA was more oxidized with higher f44 value(0.14 ± 0.02) and more relevant to real atmosphere than that formed at high concentrations. This work should help to deeply understand SOA formation and improve the performance of air quality models for SOA simulation. | Tianzeng Chen Yongchun Liu Biwu Chu Changgeng Liu Jun Liu Yanli Ge Qingxin Ma Jinzhu Ma Hong He | 2019 | Journal of Environmental Sciences2019，31，5： | 4 |
| 2 | Adhesion to fibronectin induces p27 Kip1 nuclear accumulation through down-regulation of Jab1 and contributes to cell adhesion-mediated drug resistance (CAM-DR) in RPMI 8,226 cells显示文摘 | Min Fei Qinglei Hang Sicong Hou Songbin He Changgeng Ruan | 2014 | Molecular and Cellular Biochemistry2014，，1： | 1 |
| 3 | Studied on theory and application of nondestructive inspection using eompton scattering显示文摘 | Liao Changgeng Yuan Junqian He Haiyan | 1987 | Kexue Tongbao1987，32，8： | 1 |
| 4 | Studied on theory and application of nondestructive inspection using Compton scattering显示文摘 | Liao Changgeng Yuan Junqian He Haiyan | 1987 | Kexue Tongbao1987，32，8： | 1 |
| 5 | Impact of coke dry quenching process on coke quality显示文摘 | LU JIN HE YABIN TANG CHANGGENG | 2002 | Iron and Steel2002，37，1： | 1 |
| 6 | Electrochemical and biological performance of hierarchical platinum-iridium electrodes structured by a femtosecond laser显示文摘Neural electrode interfaces are essential to the stimulation safety and recording quality of various bioelectronic therapies.The recently proposed hierarchical platinum-iridium(Pt-Ir)electrodes produced by femtosecond lasers have exhibited superior electrochemical performance in vitro,but their in vivo performance is still unclear.In this study,we explored the electrochemical performance,biological response,and tissue adhesion of hierarchical Pt-Ir electrodes by implantation in adult rat brains for 1,8,and 16 weeks.Regular smooth Pt-Ir electrodes were used as a control.The results showed that the electrochemical performance of both electrodes decreased and leveled off during implantation.However,after 16 weeks,the charge storage capacity of hierarchical electrodes stabilized at~16.8 mC/cm^(2),which was 15 times that of the smooth control electrodes(1.1 mC/cm^(2)).Moreover,the highly structured electrodes had lower impedance amplitude and cutoff frequency values.The similar histological response to smooth electrodes indicated good biocompatibility of the hierarchically structured Pt-Ir electrodes.Given their superior in vivo performance,the femtosecond laser-treated Pt-Ir electrode showed great potential for neuromodulation applications. | Linze Li Changqing Jiang Wanru Duan Zhiyan Wang Feng Zhang Changgeng He Tiangang Long Luming Li | 2022 | Microsystems & Nanoengineering2022，8，5： | 1 |
| 7 | Studied on theory and application of nondestructive inspeetion using compton scattering 显示文摘 | Liao Changgeng Yuan Junqian He Haiyan | 1987 | Kexue Tongbao1987，32，8： | 1 |
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