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Recent advances in designing conductive hydrogels for flexible electronics

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InfoMat 2020年第5期2卷 843-865页

作者： Qiongyao peng Jingsi Chen Tao Wang xuwen peng Jifang Liu Xiaogang Wang Jianmei Wang Hongbo Zeng Department of Chemical and Materials Engineering University of AlbertaEdmontonAlbertaCanada The Fifth Affiliated Hospital Guangzhou Medical UniversityGuangzhouGuangdongChina Heavy Machinery Engineering Research Center of Education Ministry Taiyuan University of Science and TechnologyTaiyuanChina

Flexible electronics have emerged as an exciting research area in recent years,serving as ideal interfaces bridging biological systems and conventional electronic *** electronics can not only collect physiological signals for human health monitoring but also enrich our daily life with multifunctional smart materials and *** hydrogels(CHs)have become promising candidates for the fabrication of flexible electronics owing to their biocompatibility,adjustable mechanical flexibility,good conductivity,and multiple stimuli-responsive *** achieve on-demand mechanical properties such as stretchability,compressibility,and elasticity,the rational design of polymer networks via modulating chemical and physical intermolecular interactions is ***,the type of conductive components(eg,electron-conductive materials,ions)and the incorporation method also play an important role in the conductivity of ***-CHs usually possess excellent conductivity,while ion-CHs are generally transparent and can generate ion gradients within the hydrogel *** mini review focuses on the recent advances in the design of CHs,introducing various design strategies for electron-CHs and ion-CHs employed in flexible electronics and highlighting their versatile applications such as biosensors,batteries,supercapacitors,nanogenerators,actuators,touch panels,and displays.

关键词： biosensor composite hydrogel conductive hydrogel flexible electronics supercapacitor

Probing the Interfacial Forces and Surface Interaction Mechanisms in Petroleum Production Processes

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Engineering 2022年第11期18卷 49-61页

作者： Diling Yang xuwen peng Qiongyao peng Tao Wang Chenyu Qiao Ziqian Zhao Lu Gong Yueliang Liu Hao Zhang Hongbo Zeng Department of Chemical and Materials Engineering University of AlbertaEdmontonAB T6G 1H9Canada College of Petroleum Engineering China University of PetroleumBeijing 102249China

Despite the advances that have been made in renewable energy over the past decade,crude oil or petroleum remains one of the most important energy resources to the *** production presents many challenging issues,such as the destabilization of complex oil-water emulsions,fouling phenomena on pipelines and other facilities,and water *** problems are influenced by the molecular forces at the oil/water/solid/gas interfaces involved in relevant ***,we present an overview of recent advances on probing the interfacial forces in several petroleum production processes(e.g.,bitumen extraction,emulsion stabilization and destabilization,fouling and antifouling phenomena,and water treatment)by applying nanomechanical measurement technologies such as a surface forces apparatus(SFA)and an atomic force microscope(AFM).The interaction forces between bitumen and mineral solids or air bubbles in the surrounding fluid media determine the bitumen liberation and flotation efficiency in oil sands *** stability of complex oil/water emulsions is governed by the forces between emulsion drops and particularly between interface-active species(e.g.,asphaltenes).Various oil components(e.g.,asphaltenes)and emulsion drops interact with different substrate surfaces(e.g.,pipelines or membranes),influencing fouling phenomena,oil-water separation,and wastewater *** these intermolecular and interfacial forces has advanced the mechanistic understanding of these interfacial interactions,facilitating the development of advanced materials and technologies to solve relevant challenging issues and improve petroleum production *** challenges and suggestions on future research directions in the field are also presented.

关键词： Intermolecular and surface forces Interface Emulsion Colloids Fouling and antifouling Water treatment

Fluorescence imaging analysis of the glioma microenvironment

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Journal of Innovative Optical Health Sciences 2023年第1期16卷 55-66页

作者： xuwen peng Yuzhou Chen Yuke Wang Shuhong Qi Britton Chance Center for Biomedical Photonics Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology Wuhan Hubei 430074P.R.China MoE Key Laboratory for Biomedical Photonics School of Engineering Sciences Huazhong University of Science and Technology Wuhan Hubei 430074P.R.China

Glioma is the most malignant brain *** neurons,macrophages,T cells and other immune ellls constitute the glioma immunosuppressive *** accurate spatial distri-bution of these cells in the glioma microenvironment and its relationship with glioma metastasis is *** constructed a mouse gliomna cell line stably expressing the large Stokes shifted yellow fluorescent protein and applied it to the multicolor immunofluorescence *** inaging data revealed that the neurons were sparsely distributed in the glioma core and the mumber of neurons decreased by 90%compared with normal brain *** spatial distribution of monocyte-macrophages and microglia is *** monocyte macrophages and T cells were heavily recrnuited into the glioma core and *** was no significant difference in the distribution of microglia amnong glioma core,margin,and normal brain *** results provided new perspectives for targeting immune regulation cells and developing new immuno-therapy strategies for glioma.

关键词： Glioma microenvironment spatial distribution heterogeneity multicolor immuno-fluorescence large Stokes-shifted fluorescent protein.

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降低铅银渣含锌的研究与实践

湖南有色金属 2023年第4期39卷 33-35页

作者：彭许文南丹县南方金属有限责任公司广西南丹547000

通过加强多膛炉操作,降低氧化锌中的不溶锌含量,过程中加强球磨矿浆粒度、温度、酸度与反应时间的控制,可以大幅降低铅银渣含锌,不但可以降低损失、创造效益,也为后续铅银渣进入铅冶炼系统处理创造了良好的条件。

关键词：锌浸出渣多膛炉不溶锌中性浸出酸性浸出铅银渣 ZnS

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新时代中国适应体育教师专业化演变与再思考

四川体育科学 2021年第1期40卷 123-127,140页

作者：彭续文曹烃江西师范大学体育学院江西南昌330000

采用文献资料法、逻辑分析法等对习近平新时代体育思想背景下中国适应体育教师专业化的演变与再思考进行分析,阐述了我国适应体育教师专业化进程及相关法规与政策的重要节点信息。主要结论:新时代体育思想背景下适应体育教师的专业化发... 详细信息

采用文献资料法、逻辑分析法等对习近平新时代体育思想背景下中国适应体育教师专业化的演变与再思考进行分析,阐述了我国适应体育教师专业化进程及相关法规与政策的重要节点信息。主要结论:新时代体育思想背景下适应体育教师的专业化发展是我国适应体育的新发展趋势;社会大众缺乏对适应体育及教师的认识和理解、适应体育教育制度制定有待完善、特殊学校缺乏对适应体育教师的鼓励与支持、适应体育教师自身缺乏内在动力是阻碍我国适应体育教师专业化进程主要因素。建议:我国适应体育教师专业化进程需健全适应体育教育的认知系统、建立适应体育教师资格认证制度、完善适应体育教师职前教育模式、改善适应体育教师继续教育模式。

关键词：适应体育教师新时代专业化演变思考

Erratum to“Probing the Interfacial Forces and Surface Interaction Mechanisms in Petroleum Production Processes”[Engineering 18(2022)49-61]

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Engineering 2023年第3期22卷 233-233页

In Ref.[1],Eq.(8)has a typo,the following replacement should be done.γ_(bb)/2rδ/δr(rδ(r,t)/δr=2γ_(bb)/R_(bb)-Þ(t,t)-Ⅱ[h[r,t)](bubble=drop-bubble=drop)The publisher regrets an error in the original–article,and the sentence that explained the equation“Eqs.(8)–(10)show the augmented Young–Laplace equation for the interactions of gas bubbles or liquid droplets in different configurations,where Rb is the bubble/drop radius,Rp is the particle radius,Rbp=(1/Rb+1/Rp)1.

关键词： bubble radius equation

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)

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

Studies on New Steroidal Saponins from Allii macrostemonis Bulbus and Their Antitumor Activities

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Chemical Research in Chinese Universities 2018年第1期34卷 61-66页

作者： YAO Hua WANG Tong WU Qian LIU Ying LI peng LI xuwen JIN Yongri Scienttfic Research Center China-Japan Union Hospital of Jilin University Changchun 130033 P. R. China College of Chemistry Jilin University Changchun 130012 P. R. China

Two new steroidal saponms（2, 3） and two known compounds（1, 4） were isolated from 75% ethanol extract ofAllii macrostemonis bulbus by various spectral methods. The two new steroidal saponins were respectively elucidated as （25S）-26-O-β-D-glucopyranosyl-5α-furostanol-2α,3β,22,26-tetrol-3-O-β-D-glucopyranosyl（1→2）-[β-D- glucopyranosyl（1→3）]-β-D-glucopyranosyl（1→4 ）-β-D-galactopyranoside（2 ） and 26-O-β-D-glucopyranosyl-5α- furostanol-25（ 27）-ene-3β,22,26-tetrol-3-O-β-D-glucopyranosyl（ 1→2 ）-[β-D-glucopyranosyl（ 1→3 ）] -β-D-glucopyranosyl- （1→4）-β-D-galactopyranoside（3）. Compound 4 was obtained from this medical plant for the first time. The activity experiments of proliferation inhibition on tumor cells were performed by cell counting kit-8（CCK-8） method for compound 2（25S-configuration） and its isomer（compound 1, 25R-configttration）. The results show that compounds 1 and 2 have weak inhibition on lung cancer A549 cells, melanoma A375 cells and breast cancer MCF-7 cells as well as certain inhibitory effect on liver cancer HepG2 cells, and the inhibitory effect of compound 1 is stronger than that of compound 2.

关键词： Allii macrostemonis bulbus Steroidal saponin Structure identification Proliferation inhibition Cell counting kit-8(CCK-8) method