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Adhesive Coacervates: Adhesive Coacervates Driven by Hydrogen-Bonding Interaction (Small 43/2020)

Small 2020年第43期16卷

作者： Qiongyao peng Jingsi Chen Zicheng Zeng Tao Wang Li Xiang xuwen peng Jifang Liu Hongbo Zeng Department of Chemical and Materials Engineering University of Alberta Edmonton Alberta T6G 1H9 Canada The Fifth Affiliated Hospital Guangzhou Medical University Guangzhou Guangdong 510700 China

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Spectroscopic study on transformations of dissolved organic matter in coal-to-liquids wastewater under integrated chemical oxidation and biological treatment process

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Journal of Environmental Sciences 2018年第8期30卷 206-216页

作者： Siwei peng xuwen He Hongwei Pan Department of Chemical and Environmental Engineering China University of Mining and Technology(Beijing)Beijing 100083China School of Water Conservancy North China University of Water Resources and Electric PowerZhengzhou 450045China

A large amount of wastewater containing various toxic organic contaminants is produced during coal-to-liquids process. In this study, several spectroscopic methods were used to monitor the transformation of organic pollutants during an integrated chemical oxidation and biological process. The results showed that the hydrophobic acid fraction increased after Fenton oxidation, which was likely due to the production of small-molecule organic acids. Soluble microbial products were generated during biological treatment processes,which were degraded after ozonation; meanwhile, the hydrophilic base and acid components increased. Ultraviolet-visible spectroscopic analysis indicated that peaks at the absorption wavelengths of 280 and 254 nm, which are associated with aromatic substances, were detected in the raw water. The aromatic substances were gradually removed, becoming undetectable after biological aeration filter（BAF） treatment. Fourier transform infrared spectroscopy analysis revealed that the functional groups of phenols;benzene, toluene, ethylbenzene, and xylene（BTEX）; aromatic hydrocarbons; aliphatic acids;aldehydes; and esters were present in raw wastewater. The organic substances were oxidized into small molecules after Fenton treatment. Aromatic hydrocarbons were effectively removed through bioadsorption and biodegradation after BAF *** organic matter was reduced and finally became undetectable after anoxic–oxic treatment in combination with a membrane bioreactor. Four fluorescent components were fractionated and obtained via excitation–emission matrix parallel factor analysis（EEM-PARAFAC）. Dissolved organic matter fractionation in conjunction with EEM-PARAFAC was able to monitor more precisely the evolution of characteristic organic contaminants.

关键词： Coal-to-liquids wastewater Spectroscopic analysis Dissolved organic matter fractionation UV–visible spectrum Excitation–emission matrix parallel factor analysis （EEM-PARAFAC）

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Synthesis of Cd_xZn_1-xS@MIL-101(Cr) Composite Catalysts for the Photodegradation of Methylene Blue

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NANO 2018年第10期13卷

作者： Yang, Shipeng peng, Siwei Zhang, Chunhui He, xuwen Cai, Yaqi China Univ Min & Technol Sch Chem & Environm Engn Beijing 11 Xueyuan Rd Beijing 100083 Peoples R China Chinese Acad Sci Res Ctr Ecoenvironm Sci 18 Shuangqing Rd Beijing 100085 Peoples R China Univ Chinese Acad Sci 19 A Yuquan Rd Beijing 100049 Peoples R China

Nanoparticles of the semiconductor catalyst CdxZn1-xS were embedded into the metal organic framework MIL-101(Cr) to obtain CdxZn1-xS@MIL-101 (Cr) nanocomposites. These materials not only possess high surface areas and mesopores but also show good utilization of light energy. The ultraviolet-visible diffuse reflectance patterns of CdxZn1-xS@MIL-101 (Cr) nanocomposites showed that Cd0.8Zn0.2S@MIL-101(Cr) possessed good visible light response ability among the synthesized nanocomposites. The photocatalytic performance of the CdxZn1-xS@MIL-101 (Cr) nanocomposites were tested via degradation and mineralization of methylene blue in neutral water solution under light irradiation using a 300W xenon lamp. As a result, using Cd0.8Zn0.2S@MIL-101(Cr) as a catalyst, 99.2% of methylene blue was mineralized within 30 min. Due to the synergistic effect of adsorption by the MIL-101(Cr) component and photocatalytic degradation provided by the Cd0.8Zn0.2S component, the Cd0.8Zn0.2S@MIL-101(Cr) catalyst displayed superior photocatalytic performance relative to Cd0.8Zn0.2S@MIL-101(Cr). Furthermore, Cd0.8Zn0.2S@MIL-101(Cr) possessed excellent stability during photodegradation and exhibited good reusability. The remarkable photocatalytic performance of Cd0.8Zn0.2S@MIL-101(Cr) is likely due to the effective transfer of electrons and holes at the heterojunction interfaces.

关键词： CdxZn1-xS@MIL-101(Cr) photodegradation methylene blue

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Investigation of fluoride and turbidity removal from coal mine water by combined micro-flocculation and membrane filtration: Lab to pilot scale

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Journal of Environmental Sciences 2025年

作者： Liping Zhang Weiwei Wang Yiyun An Huaran Sun Eryong Wu xuwen He Siwei peng Cun Zhang School of Chemical and Environmental Engineering China University of Mining and Technology-Beijing Beijing 100083 China Datang Environmental Industry Group Co. Ltd Beijing 100097 China School of Mines Key Laboratory of Deep Coal Resource Ministry of Education of China China University of Mining & Technology Xuzhou Jiangsu 221116 China

The concentration of turbidity and fluoride in mine drainage exceeding the discharge standard, which impede coal mine water broader application. In this study, micro-flocculation, which was based on the fluoride removal agent (CFYJ-L) developed by our research group, was combined with direct filtration membrane (MFDMF) to remove the high concentrations of turbidity and fluoride. Firstly, we investigated the impacts of factors on fluoride, turbidity removal by the CFYJ-L, explored the mechanisms of fluoride removal and screened cleaning agents for membrane fouling. Findings indicate that the optimal process parameters were a dosage of 1.16 g/L, pH 6.11, stirring time 10.90 min, which would let F − concentration from 20 to 0.453 mg/L. Suspended solids (SS), Cl − , SO 4 2− and CO 3 2- all seems not reduced fluoride removal efficiency. The fluoride removal mechanism is primarily through electrostatic adsorption, ion exchange, complexation and hydrogen bonding, resulting in the formation of precipitates that remove fluoride. Meanwhile, the optimal process parameters for treating simulated fluorinated coal mine water with MFDMF process was an operating pressure of 0.2 MPa. Membrane fouling was mainly characterized by cake filtration, accompanied by pore clogging. The best cleaning agent for membrane fouling was 0.2 % HCl, which can increase the membrane flux recovery rate from 70 % to 91 %. A 90-day pilot site continuous operation demonstrated the stability of the MFDMF process, with a treatment cost was reduced from over 3.36 RMB/m 3 to 2.60 RMB/m 3 and land area reduction exceeding 40 % compared to existing process.

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A particle swarm inspired multi-elitist artificial bee colony algorithm for real-parameter optimization

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COMPUTATIONAL OPTIMIZATION AND APPLICATIONS 2014年第2期57卷 493-516页

作者： Xiang, Yi peng, Yuming Zhong, Yubin Chen, Zhenyu Lu, xuwen Zhong, Xuejun Guangdong Baiyun Univ Dept Basic Courses Guangzhou 510450 Guangdong Peoples R China Guangzhou Univ Sch Math & Informat Sci Guangzhou 510006 Guangdong Peoples R China

The Artificial Bee Colony (ABC) algorithm is one of the most recent swarm intelligence based algorithms which simulates the foraging behavior of honey bee colonies. In this work, a particle swarm inspired multi-elitist ABC algorithm named PS-MEABC is proposed and applied for real-parameter optimization. In this modified version, the global best solution and an elitist randomly selected from the elitist archive are used to modify parameters of each food source in either onlooker bees or employed bees phases. PS-MEABC is compared with 5 state-of-the-art swarm based algorithms on CEC05 and BBOB12 benchmark functions in terms of four metrics: the mean error, the best error, the success rate (SR) and the expected running time (ERT). Wilcoxon signed ranks test results on the mean and the best error show that the performance of PS-MEABC is significantly better than or at least similar to these algorithms, and PS-MEABC has wider application range in terms of the success rate and faster convergence speed in terms of the expected running time. Our algorithm is comparable to its competitors with a fewer control parameters to be tuned.

关键词： Artificial bee colony algorithm Multi-elitist preservation strategy PSO algorithm Wilcoxon signed ranks test

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Two New Baccharane Glycosides from Seeds of Impatientis balsamina L. with in vitro Growth Inhibitory Activity in Human Cancer A375 Cells

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Chemical Research in Chinese Universities 2017年第5期33卷 753-757页

作者： WU Oian JIN Yongri YAO Hua LIU Ying LI peng LI xuwen College of Chemistry Jilin University Changchun 130021 P R. China Scientific Research Center China-Japan Union Hospital of Jilin University Changchun 130021 P. R. China

Two new baccharane-type glycosides（1 and 2）, together with seven known baccharane-type glycosides （3u9） hosenkoside A, hosenkoside B, hosenkoside C, hosenkoside F, hosenkoside M, hosenkoside K and hosenko- side G were isolated from the dried seeds of Impatientis balsamina L. The new baccharane-type glycosides were identified as honsenkol A-3-O-β-D-glucopyranosyl-26-O-p-D-glucopyranosyl-28-O-β-D-glucopyranosyl-O-β-D- glucopyranosyl（1） and （3S,4R,17R,20S）17-hydrroxy-3-O-β-D-xylopyranose（12）-β-D-glucopyranosyl-26-O-β-D- glucopyranosyl-28-O-β-D-glucopyranosyl-21,24-epoxybaccharane（2）, respectively, by spectroscopic methods, in- cluding NMR（1D and 2D）, IR and HR-ESI-MS. Compounds 1 and 2 were evaluated for in vitro inhibitory activity against the cell lines. Compound 2 with a new baccharane skeleton had anti-hepatic fibrosis activity against A375 cells in bioassay results, which means the new compounds have potential value in antitumor applications.

关键词： Impatientis balsamina L. Seed Baccharane-type glycoside Cytotoxic activity

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Platelet microparticles-derived miR-25-3p promotes the hepatocyte proliferation and cell autophagy via reducing B-cell translocation gene 2

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JOURNAL OF CELLULAR BIOCHEMISTRY 2020年第12期121卷 4959-4973页

作者： Xu, Yuyuan Li, Wenfei Liang, Guangyu peng, Jie Xu, xuwen Southern Med Univ Nanfang Hosp Dept Infect Dis 1838 North Guangzhou Ave Guangzhou 510515 Guandong Peoples R China

Platelets are critical regulators of liver regeneration, but the mechanisms are still not fully understood. Platelets have been shown to contain a wide variety of microRNAs (miRNAs) and play an important role in many diseases. However, the mechanism that how the platelet microparticles (PMPs)-derived miRNA regulate the hepatocyte proliferation is not very clear. In this study, we have successfully isolated and identified PMPs. We also found that PMPs, which could be well integrated into the HHL-5 cells, could upregulate the level of miR-25-3p in HHL-5 cells. Meanwhile, we found that PMPs-derived miR-25-3p promoted HHL-5 cells proliferation by accelerating cells into the S phase, and enhanced the autophagy by increasing the LC3II expression and reducing the P62 expression. Then, we proved that the miR-25-3p could target the B-cell translocation gene 2 (BTG2) and downregulate the expression levels of the BTG2 gene in HHL-5 cells. In addition, the overexpression of BTG2 significantly inhibited the proliferation and autophagy abilities of HHL-5 cells, while cotransfected miR-25-3p mimics or PMPs could partially rescue HHL-5 cells proliferation and autophagy. Furthermore, we proved that PMPs accelerated hepatocyte proliferation by regulating autophagy pathways. Therefore, PMPs-derived miR-25-3p promoted HHL-5 cell proliferation and autophagy by targeting BTG2, which may be a new therapeutic method for liver regeneration.

关键词： autophagy B-cell translocation gene 2 liver regeneration miR-25-3p platelet microparticles proliferation

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Highly efficient synthesis of hydrogen-bonded aromatic tetramers as macrocyclic receptors for selective recognition of lithium ions

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ORGANIC CHEMISTRY FRONTIERS 2019年第15期6卷 2654-2661页

作者： Guo, xuwen Yang, Yizhou peng, Zhiyong Cai, Yimin Feng, Wen Yuan, Lihua Sichuan Univ Coll Chem Key Lab Radiat Phys & Technol Minist Educ Chengdu 610064 Sichuan Peoples R China

Persistently folded aromatic amide macrocycles comprising four monomeric units (biphenyl-cyclo[4]aramide) were synthesized with high efficiency via a one-step approach along with the larger cyclic oligomer, biphenyl-cyclo[8]aramide as a minor product. Such cyclic hydrogen-bonded aromatic tetramers feature four amide oxygens enclosing a cavity with small dimensions, enabling the selective complexation of alkali metal ions, particularly Li+, with high affinity. The cyclization efficiency and selectivity of smaller macrocycles was further improved using fragment coupling and Li+-based template approaches. In addition, the superior binding ability of biphenyl-cyclo[4]aramide towards Li+ over its acyclic analogues was observed, demonstrating a remarkable macrocyclic effect.

关键词： Amides

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Patients with tuberculous meningitis and hepatitis B co-infection have increased risk for antituberculosis drug-induced liver injury and poor outcomes

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INFECTIOUS DISEASES 2020年第11期52卷 793-800页

作者： Mo, Xichao Xu, xuwen Ren, Zuning Guan, Junjie peng, Jie Southern Med Univ Nanfang Hosp Dept Infect Dis 1838 Guangzhoudadaobei Rd Guangzhou 510515 Peoples R China

Background:Tuberculous meningitis (TBM) is one of the most severe forms of tuberculosis. Previous studies reported that hepatitis B virus (HBV) infection could increase the risk of antituberculosis drug-induced liver injury (ATB-DILI) in pulmonary tuberculosis patients. To date, only a few studies exist on the effect of HBV on TBM. Methods:This inpatient study retrospectively analyzed the medical records of patients who were diagnosed with TBM between June 2002 and June 2018. Statistical analysis was used to reveal the difference between the HBV and non-HBV groups. Univariate analysis and multivariate regression analysis were performed on data to determine the prognostic factors of TBM. Results:A total of 386 patients were enrolled in our study, 57 of whom were included in the HBV group and 329 in the non-HBV group. The HBV group showed a higher frequency of ATB-DILI (HBV group: 14.0% versus non-HBV group: 3.3%,p < .001) and a higher risk of poor outcomes (i.e. death during inpatient period or neurological deficit at discharge, HBV group: 31.6% versus non-HBV group: 19.8%,p = .045) than the non-HBV group. The multivariate regression analysis identified ATB-DILI, scores of 3-8 on the Glasgow Coma Scale and hydrocephalus as independent predictors of poor outcomes in TBM patients. Conclusions:Our study demonstrated that HBV co-infection could increase the incidence of ATB-DILI and the risk of poor outcomes as identified by three predictors in TBM patients.

关键词： Tuberculous meningitis hepatitis B virus antituberculosis drug-induced liver injury predictors

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A photo-degradable BODIPY-modified Ru(ii) photosensitizer for safe and efficient PDT under both normoxic and hypoxic conditions

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DALTON TRANSACTIONS 2024年第8期53卷 3579-3588页

作者： peng, Yatong Da, xuwen Zhou, Wanpeng Xu, Yunli Liu, Xiulian Wang, Xuesong Zhou, Qianxiong Tech Inst Phys & Chem Chinese Acad Sci Key Lab Photochem Convers & Optoelect Mat Beijing 100190 Peoples R China Univ Chinese Acad Sci Beijing 100049 Peoples R China

Photodynamic therapy (PDT) is promising for cancer treatment but still suffers from some limitations. For instance, PDT based on O-1(2) generation (in a type-II mechanism) is heavily dependent on high oxygen concentrations and will be significantly depressed in hypoxic tumors. In addition, the residual photosensitizers after PDT treatment may cause severe side-effects under light irradiation. To solve these problems, herein a BODIPY (boron dipyrromethene)-modified Ru(II) complex [Ru(dip)(2)(tpy-BODIPY)](2+) (complex 1, dip = 4,7-diphenyl-1,10-phenanthroline, tpy = 2,2':6',2''-terpyridine) was designed and synthesized. Complex 1 exhibited both high singlet oxygen quantum yield (Phi = 0.7 in CH3CN) and excellent superoxide radical (O-2(center dot)-) generation, and thus demonstrated efficient PDT activity under both normoxic and hypoxic conditions. Moreover, complex 1 is photo-degradable in water, and greatly loses its ROS generation ability after PDT treatment. These novel properties of complex 1 make it promising for efficient PDT under both normoxic and hypoxic conditions with reduced side-effects.

关键词： Photosensitizers

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