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Your search keyword '"Xu, Qiongqiong"' showing total 23 results
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23 results on '"Xu, Qiongqiong"'

9. Synthesis of Ultrahigh Molecular Weight Poly(methyl Methacrylate) via the Polymerization of MMA Initiated by the Combination of Palladium Carboxylates with Thiols.

Author

Zhang, Panpan, Xu, Qiongqiong, Mao, Wenyu, Lv, Jiaxing, Tang, Haodong, and Tang, Huadong

Subjects
*METHYL methacrylate, *NUCLEAR magnetic resonance spectroscopy, *ELECTRON paramagnetic resonance spectroscopy, *MOLECULAR weights, *PALLADIUM, *CARBOXYLATES, *SULFUR compounds, *ORGANOSULFUR compounds
Abstract

A novel synthesis of ultrahigh molecular weight poly(methyl methacrylate) (PMMA) using organosulfur compounds combined with a catalytical amount of transition metal carboxylates as an initiator has been developed. The combination of 1-octanethiol with palladium trifluoroacetate (Pd(CF3COO)2) was found to be a very efficient initiator for the polymerization of methyl methacrylate (MMA). An ultrahigh molecular weight PMMA with a number-average molecular weight of 1.68 × 106 Da and a weight-average molecular weight of 5.38 × 106 Da has been synthesized at the optimal formulation of [MMA]:[Pd(CF3COO)2]:[1-octanethiol] = 94,300:8:23 at 70 °C. A kinetic study showed that the reaction orders with respect to Pd(CF3COO)2, 1-octanethiol, and MMA are 0.64, 1.26, and 1.46, respectively. A variety of techniques such as proton nuclear magnetic resonance spectroscopy (1H NMR), electrospray ionization mass spectroscopy (ESI-MS), size exclusion chromatography (SEC), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), and electron paramagnetic resonance spectroscopy (EPR) were employed to characterize the produced PMMA and palladium nanoparticles (Pd NPs). The results revealed that Pd(CF3COO)2 was firstly reduced by the excess of 1-octanethiol to form Pd NPs at the early stage of the polymerization, followed by the adsorption of 1-octanethiol on the surface of nanoparticles and subsequent generation of corresponding thiyl radicals to initiate the polymerization of MMA. [ABSTRACT FROM AUTHOR]

Published
2023
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10. Gene interaction analysis of psoriasis in Chinese Han population

Author

Xu, Qiongqiong, primary, Zheng, Xiaodong, additional, Mao, Yiwen, additional, Chen, Weiwei, additional, Chen, Shirui, additional, Zhang, Hui, additional, Zhen, Qi, additional, Li, Bao, additional, Yong, Liang, additional, Ge, Huiyao, additional, Yu, Yafen, additional, Zhang, Ruixue, additional, Cao, Lu, additional, Cheng, Hui, additional, Wang, Wenjun, additional, and Sun, Liangdan, additional

Published
2022
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11. Genome-wide meta-analysis identifies ten new psoriasis susceptibility loci in the Chinese population

Author

Chen, Weiwei, primary, Wang, Wenjun, additional, Yong, Liang, additional, Zhen, Qi, additional, Yu, Yafen, additional, Ge, Huiyao, additional, Mao, Yiwen, additional, Cao, Lu, additional, Zhang, Ruixue, additional, Hu, Xia, additional, Li, Zhuo, additional, Wang, Yirui, additional, Fan, Wencheng, additional, Xu, Qiongqiong, additional, Zhang, Hui, additional, Chen, Shirui, additional, Wu, Jing, additional, and Sun, Liangdan, additional

Published
2022
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12. Polymorphisms in ERAP1 gene are associated with psoriasis

Author

Chen, Weiwei, primary, Yong, Liang, additional, Ge, Huiyao, additional, Xu, Qiongqiong, additional, Zhen, Qi, additional, Li, Bao, additional, Yu, Yafen, additional, Wu, Jing, additional, Zheng, Xiaodong, additional, Gao, Jinping, additional, Liang, Bo, additional, Cheng, Hui, additional, Sun, Liangdan, additional, and Wang, Wenjun, additional

Published
2022
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13. Deep sequencing of 1320 genes reveals the landscape of protein-truncating variants and their contribution to psoriasis in 19,973 Chinese individuals

Author

Xu, Huixin, primary, Zhen, Qi, additional, Bai, Mingzhou, additional, Fang, Lin, additional, Zhang, Yong, additional, Li, Bao, additional, Ge, Huiyao, additional, Moon, Sunjin, additional, Chen, Weiwei, additional, Fu, Wenqing, additional, Xu, Qiongqiong, additional, Zhou, Yuwen, additional, Yu, Yafeng, additional, Lin, Long, additional, Yong, Liang, additional, Zhang, Tao, additional, Chen, Shirui, additional, Liu, Siyang, additional, Zhang, Hui, additional, Chen, Ruoyan, additional, Cao, Lu, additional, Zhang, Yuanwei, additional, Zhang, Ruixue, additional, Yang, Huanjie, additional, Hu, Xia, additional, Akey, Joshua M., additional, Jin, Xin, additional, and Sun, Liangdan, additional

Published
2021
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14. Health‐related quality of life of COVID‐19 patients after discharge: A multicenter follow‐up study

Author

Qu, Guangbo, primary, Zhen, Qi, additional, Wang, Wenjun, additional, Fan, Song, additional, Wu, Qibing, additional, Zhang, Chengyuan, additional, Li, Bao, additional, Liu, Gang, additional, Yu, Yafen, additional, Li, Yonghuai, additional, Yong, Liang, additional, Lu, Baojing, additional, Ding, Zhen, additional, Ge, Huiyao, additional, Mao, Yiwen, additional, Chen, Weiwei, additional, Xu, Qiongqiong, additional, Zhang, Ruixue, additional, Cao, Lu, additional, Chen, Shirui, additional, Li, Haiwen, additional, Zhang, Hui, additional, Hu, Xia, additional, Zhang, Jing, additional, Wang, Yonglian, additional, Zhang, Hong, additional, Liang, Chaozhao, additional, Sun, Liangdan, additional, and Sun, Yehuan, additional

Published
2021
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22. Catastrophic health expenditure among type 2 diabetes mellitus patients: A province‐wide study in Shandong, China.

Author

Jing, Zhengyue, Chu, Jie, Imam Syeda, Zerin, Zhang, Xinyi, Xu, Qiongqiong, Sun, Long, and Zhou, Chengchao

Subjects
TYPE 2 diabetes, PEOPLE with diabetes, MEDICAL care costs, DIABETES, LOGISTIC regression analysis
Abstract

Aims/Introduction: Diabetes mellitus often causes high economic burden on the patients and their households. The present study aimed to assess the incidence and intensity of catastrophic health expenditure (CHE) relating to type 2 diabetes mellitus care, and to explore its determinants in China. Materials and Methods: A total of 1,948 type 2 diabetes patients were included in the analysis. CHE for type 2 diabetes mellitus was defined as out‐of‐pocket payments for diabetes care that were ≥40% of the non‐food expenditure of a household. The Chi‐square‐test was used to identify the factors associated with CHE. Multivariate logistic regression was used to assess the effects of explanatory analysis variables. Results: The incidence of CHE for type 2 diabetes mellitus care was 13.8%. An association was observed between CHE incidence and household income level, and the poorest group was more likely to experience CHE as a result of diabetes mellitus care. The type 2 diabetes mellitus patients with complications were found to be more likely to experience CHE. Diabetes patients who experienced outpatient or inpatient services increased the likelihood of CHE, and those who experienced inpatient services were more likely to incur CHE. Conclusions: Type 2 diabetes mellitus has a significantly catastrophic effect on patients and their households in China. Early screening for type 2 diabetes mellitus patients among the high‐risk groups and effective management of the detected cases should be priorities to reduce the overall healthcare expenditure for type 2 diabetes mellitus. Type 2 DM had a significantly catastrophic effect on the patients and their households in China. Early screening for type 2 DM patients among the high risk groups and effective management on the detected cases should be priorities to reduce the overall healthcare expenditure for type 2 DM. [ABSTRACT FROM AUTHOR]

Published
2019
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