| 1 | Source apportionment of VOCs in a typical medium-sized city in North China Plain and implications on control policy显示文摘Characteristics of atmospheric VOCs(volatile organic compounds) have been extensively studied in megacities in China, however, they are scarcely investigated in medium/smallsized cities in North China Plain(NCP).A comprehensive research on possible sources of VOCs was conducted in a medium-sized city of NCP, from May to September 2019.A total of 143 canister samples of 8 sites in Xuchang city were collected, and 57 VOC species were detected.The average VOC concentrations were 42.6 ± 31.6 μg/m3, with 53.7 ± 31.0 μg/m3 and 32.1 ± 27.8 μg/m^(3), in the morning and afternoon, respectively.Alkenes and aromatics contributed 80% of the total ozone formation potential(OFP).Aromatics accounted for more than 95% of secondary organic aerosol potential(SOAP).VOCs were dominated by the local emission with significant transport from the southeast direction.PMF analysis extracted 6 sources, which were combustion(33.1%), LPG usage(19.3%), vehicular exhaust & fuel evaporation(15.8%), solvent usage(15.2%), industrial(9.11%) and biogenic(7.51%), respectively and they contributed 33.4%, 17.6%, 12.9%, 18.6%, 9.28% and 8.22% to the OFP, respectively.Combustion and LPG usage were the dominant VOC sources;and combustion, solvent usage and LPG usage were the main sources of OFP in Xuchang city, which were different to megacities in China with a high contribution from vehicular exhaust, solvent usage and industry,suggesting specific control strategies on VOCs need to be implemented in medium-sized city such as Xuchang city. | Juanjuan Qin Xiaobo Wang Yanrong Yang Yuanyuan Qin Shaoxuan Shi Peihua Xu Rongzhi Chen Xueming Zhou Jihua Tan Xinming Wang | 2021 | Journal of Environmental Sciences2021，33，9： | 6 |
| 2 | Addition of rituximab is not associated with survival benefit compared with CHOP alone for patients with stage I diffuse large B-cell lymphoma显示文摘Background:The role of rituximab in combination with CHOP regimen in patients with stage I diffuse large B-cell lymphoma(DLBCL) remains to be defined.We aimed to compare CHOP plus rituximab(R-CHOP) with CHOP alone and determine the value of radiotherapy in these patients.Methods:Between 2003 and 2009,140 untreated patients with stage I DLBCL were retrospectively analyzed in this study.Results:Seventy-eight patients were treated in R-CHOP group and 62 in CHOP group.Ninety-one patients received additional radiotherapy at the end of chemotherapy.The different treatment groups were well-balanced with respect to baseline characteristics.Complete response(CR) rate was 77% both in R-CHOP and CHOP groups(P=0.945).After a median follow-up period of 56 months,patients received R-CHOP regimen had similar 5-year progression-free survival(PFS)(76%vs.85%;log-rank P=0.215)and 5-year overall survival(OS)(90%vs.96%;log-rank P=0.175) compared with those with CHOP alone.Patients with radiotherapy had significantly increased 5-year PFS compared with those who had chemotherapy alone(86%vs.71%;log-rank P=0.005).At multivariate analysis,patients who had CR(P=0.008) and received radiotherapy(P=0.003) were significantly associated with superior PFS.Conclusions:CHOP alone could be as effective as R-CHOP regimen and additional radiotherapy would be necessary for stage I or stage I non-bulky DLBCL patients. | Bo Jia Yuankai Shi Suyi Kang Sheng Yang Shaoxuan Hu Yexiong Li Mei Dong Weihu Wang Jianliang Yang Liqiang Zhou Peng Liu Shengyu Zhou Yan Qin Lin Gui Changgong Zhang Hua Lin Shanshan Chen Lin Wang Xiaohui He | 2015 | Chinese Journal of Cancer Research2015，27，5： | 2 |
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