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2. Adsorption performance of Pb（Ⅱ） by nitrogen-doped mesoporous carbon in tunnel construction wastewater

Author

PU Xiaoping, DUAN Pengchang, QIN Yun, LING Tao, XIONG Ying, and LIU Yuanyuan

Subjects
mesoporous carbon, nitrogen-doping, tunnel construction wastewater, pb（ⅱ）, adsorption, Environmental technology. Sanitary engineering, TD1-1066
Abstract

Nitrogen-doped mesoporous carbon（NMC） was synthesized using hard-template，and was characterized using specific surface area analyzer，transmission electron microscope，Fourier transform-infrared spectrometer and X-ray photoelectron spectroscopy. NMC was applied in the adsorption of Pb（Ⅱ） in two different tunnel construction wastewaters，and the effects of pH，reaction time on adsorption and its adsorption kinetics models and sorption isotherms were investigated. The results showed that the adsorption kinetics was best described by pseudo-second-order model，and its adsorption characteristics conformed to the Langmuir and Temkin model. According to the results of the experiments and characterization，Pb（Ⅱ） adsorption by NMC involved physisorption such as electrostatic interaction and pore diffusion and chemisorption like chelation with functional groups. The estimated maximum adsorption capacity based on Langmuir model was 493.5 mg/g and 603.9 mg/g，respectively for the two wastewaters. In addition，NMC could be regenerated and reused by treatment with HCl.

Published
2024
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21. When can display of authenticity at work facilitate coworker interactions? The moderating effect of perception of organizational politics.

Author

Tang, Yipeng, Xu, Erica, Huang, Xu, and Pu, Xiaoping

Subjects
WORK environment, EMPLOYEE attitudes, ETHICS, WORK ethic, SURVEYS, INTERPROFESSIONAL relations, INTERPERSONAL relations, DESCRIPTIVE statistics, SOCIAL skills, DATA analysis software, CORPORATE culture, SOCIAL integration
Abstract

Authenticity has long been held as a virtue. However, is it beneficial for employees to be true to themselves in coworker interactions? Drawing on social penetration theory, we argue that a focal employee's exhibited authenticity at work helps the employee penetrate the interpersonal boundaries of an interacting coworker and as a result, the employee is more likely to be included in this coworker's social circles and receive help from the coworker. Accordingly, we propose a dyadic-level model and test this model in two survey studies using a round-robin design. The results of both studies consistently demonstrated that the focal employee's exhibited authenticity is positively related to help received from the coworker via inclusion in the coworker's social circle. Further, this positive indirect relationship is moderated by the coworker's perception of organizational politics, such that the relationship is weaker when the coworker's perception of organizational politics is high. These findings help advance the understanding of when and how employees can gain relational benefits from displaying authenticity at work. [ABSTRACT FROM AUTHOR]

Published
2023
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41. Pharmacokinetics and tissue distribution study of 15 ingredients of Polygonum chinense Linn extract in rats by UHPLC–MS/MS.

Author

Chen, Xiaoqing, Wei, Liuting, Pu, Xiaoping, Wang, Yilin, and Xu, Yuanjin

Abstract

A rapid and sensitive ultrahigh‐performance liquid chromatography–tandem mass spectrometry method was developed and validated for simultaneous determination of 15 bioactive ingredients in rat plasma and tissues after oral administration of Polygonum chinense Linn extract (PCE). After addition of internal standards (ISs; rutin and danshensu), plasma and tissue samples were pre‐treated by protein precipitation with acetonitrile–ethanol. The chromatographic separation was performed on an Agilent ZORBAX RRHD Eclipse Plus C18 column with gradient elution using a mobile phase composed of methanol and water (containing 0.2% acetic acid) at a flow rate of 0.3 mL min−1. Mass spectrometric detection was carried out using a mass spectrometer in both positive and negative ion electrospray ionization modes by multiple reaction monitoring. The method provided excellent linearity, and the lower limit of quantification range 0.5–30 ng mL−1 for all analytes. The intra‐ and inter‐day precision were less than 9.12% and the accuracy ranged from −4.02% to 6.32%, respectively. The mean extraction recovery and matrix effect of analytes and ISs ranged from 83.65% to 109.20%. The method was successfully applied to the pharmacokinetics and tissue distribution study of 15 ingredients of PCE in rats. [ABSTRACT FROM AUTHOR]

Published
2021
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50. Neuroprotective Effects of a Standardized Flavonoid Extract from Safflower against a Rotenone-Induced Rat Model of Parkinson’s Disease

Author

Ablat, Nuramatjan, primary, Lv, Deyong, additional, Ren, Rutong, additional, Xiaokaiti, Yilixiati, additional, Ma, Xiang, additional, Zhao, Xin, additional, Sun, Yi, additional, Lei, Hui, additional, Xu, Jiamin, additional, Ma, Yingcong, additional, Qi, Xianrong, additional, Ye, Min, additional, Xu, Feng, additional, Han, Hongbin, additional, and Pu, Xiaoping, additional

Published
2016
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