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| 1 | Chemical characteristics,oxidative potential,and sources of PM_(2.5)in wintertime in Lahore and Peshawar,Pakistan显示文摘The chemical characteristics,oxidative potential,and sources of PM_(2.5)were analyzed at the urban sites of Lahore and Peshawar,Pakistan in February 2019.Carbonaceous species,water soluble ions,and metal elements were measured to investigate the chemical composition and sources of PM_(2.5).The dithiothreitol(DTT)consumption rate was measured to evaluate the oxidative potential of PM_(2.5).Both cities showed a high exposure risk of PM_(2.5)regarding its oxidative potential(DTT v).Carbonaceous and some of the elemental species of PM_(2.5)correlated well with DTT v in both Lahore and Peshawar.Besides,the DTT v of PM_(2.5)in Lahore showed significant positive correlation with most of the measured water soluble ions,however,ions were DTT-inactive in Peshawar.Due to the higher proportions of carbonaceous species and metal elements,Peshawar showed higher mass-normalized DTT activity of PM_(2.5)compared to Lahore although the average PM_(2.5)concentration in Peshawar was lower.The high concentrations of toxic metals also posed serious non-carcinogenic and carcinogenic risks to the residents of both cities.Principle component analysis coupled with multiple linear regression was applied to investigate different source contributions to PM_(2.5)and its oxidative potential.Mixed sources of traffic and road dust resuspension and coal combustion,direct vehicle emission,and biomass burning and formation of secondary aerosol were identified as the major sources of PM_(2.5)in both cities.The findings of this study provide important data for evaluation of the potential health risks of PM_(2.5)and for formulation of efficient control strategies in major cities of Pakistan. | Mushtaq Ahmad Qing Yu Jing Chen Siming Cheng Weihua Qin Yuepeng Zhang | 2021 | Journal of Environmental Sciences2021，33，4： | 4 |
| 2 | A thermal lethal model of rice weevils subjected to microwave irradiation显示文摘 | Siming Zhao Chengguang Qiu Shanbai Xiong Xuexun Cheng | 2007 | Journal of Stored Products Research2007，，4： | 1 |
| 3 | A thermal lethal model of riceweevils subjected to microwave irradiation 显示文摘 | Siming Zhao Cheng guang Qiu Shanbai Xiong etc | 2007 | Journal of Stored Products Research2007，43，： | 1 |
| 4 | Molecular weight and chain conformation of amylopectin from rice starch显示文摘 | MA Zhaocheng ZHAO Siming CHENG Ke | 2007 | Journal of Applied Polymer Science2007，104，5： | 1 |
| 5 | Nerve transfer with 3D-printed branch nerve conduits显示文摘Background:Nerve transfer is an important clinical surgical procedure for nerve repair by the coaptation of a healthy donor nerve to an injured nerve.Usually,nerve transfer is performed in an end-to-end manner,which will lead to functional loss of the donor nerve.In this study,we aimed to evaluate the efficacy of 3D-printed branch nerve conduits in nerve transfer.Methods:Customized branch conduits were constructed using gelatine-methacryloyl by 3D print-ing.The nerve conduits were characterized both in vitro and in vivo.The efficacy of 3D-printed branch nerve conduits in nerve transfer was evaluated in rats through electrophysiology testing and histological evaluation.Results:The results obtained showed that a single nerve stump could form a complex nerve network in the 3D-printed multibranch conduit.A two-branch conduit was 3D printed for transferring the tibial nerve to the peroneal nerve in rats.In this process,the two branches were connected to the distal tibial nerve and peroneal nerve.It was found that the two nerves were successfully repaired with functional recovery.Conclusions:It is implied that the two-branch conduit could not only repair the peroneal nerve but also preserve partial function of the donor tibial nerve.This work demonstrated that 3D-printed branch nerve conduits provide a potential method for nerve transfer. | Jing Zhang Jie Tao Hao Cheng Haofan Liu Wenbi Wu Yinchu Dong Xuesong Liu Maling Gou Siming Yang Jianguo Xu | 2022 | Burns & Trauma2022，10，1： | 0 |
| 6 | Mathematical model of oxygen outdiffusion显示文摘MATHEMATICALMODELOFOXYGENOUTDIFFUSIONONLiuRong;Cheng,QiupingLi;YidongSheSiming(CentralSouthUniversityofTechologyChngsha410083... | Liu Rong Cheng, Qiuping Li Yidong She Siming(Central South University of Techology Chngsha 410083) | 1994 | 中国有色金属学会会刊:英文版1994，4，3： | 0 |
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