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Synthesis and properties of novel cationic gemini surfactants with adamantane spacer

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Chinese Chemical Letters 2014年第2期25卷 367-369页

作者： Xiao-jian Xu jian-wei guo Xing Zhong School of Chemical Engineering and Light Industry Guangdong University of Technology

Novel quaternary ammonium cationic gemini surfactants, with two hydrocarbon chains and an adamantane core, were designed and synthesized by three-step reactions from adamantane. The structure of obtained surfactants were confirmed by 1H NMR, FTIR and elements analysis and the surface properties of these surfactants were also studied by surface tension measurements. These target surfactants exhibit much lower critical micelle concentrations （CMC） and higher efficiency in lowering the surface tension of water than typical surfactants.

关键词： Gemini surfactants Adamantane Synthesis

In situ embedded bismuth nanoparticles among highly porous carbon fibers for efficient carbon dioxide reduction

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Rare Metals 2024年第9期43卷 4312-4320页

作者： wei-jian guo Ao Zhou Wen-Wen Cai Jin-Tao Zhang Key Laboratory for Colloid and Interface Chemistry(Ministry of Education) School of Chemistry and Chemical EngineeringShandong UniversityJinan 250100China

Electrocatalysis provides an optimal approach for the conversion of carbon dioxide(CO_(2))into high-value chemicals,thereby presenting a promising avenue toward achieve carbon ***,addressing the selectivity and stability challenges of metal catalysts in electrolytic reduction remains a daunting *** this study,the electrospinning method is employed to fabricate porous carbon nanofibers loaded with bismuth nanoparticles with the help of in situ *** porous carbon nanofibers as conductive support would facilitate the dispersion of bismuth active sites while inhibiting their aggregation and promoting the mass transfer,thus enhancing their electrocatalytic activity and ***,nitrogen doping induces electron delocalization in bismuth atoms through metal-support interactions,thus enabling efficient adsorption of intermediates for improving selectivity based on the theoretical ***,Bi@PCNF-500 exhibits the exceptional selectivity and stability across a wide range of potential ***,its faradaic efficiency(FE)of formate reaches 92.7%in H-cell and94.9%in flow cell,respectively,with good electrocatalytic *** in situ characterization and theoretical calculations elucidate the plausible reaction mechanism to obtain basic rules for designing efficient electrocatalyst.

关键词： Porous carbon nanofiber N-doping Electron delocalization Carbon dioxide reduction

Effect of Hydrogen Addition on Low Temperature Metallurgical Property of Sinter

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Journal of Iron and Steel Research International 2012年第4期19卷 6-10页

作者： MU Lin jianG Xin GAO Qiang-jian wei guo SHEN Feng-man School of Materials and Metallurgy Northeastern University Shenyang 110004 Liaoning China

Hydrogen-enrich iron making process is certainly to be an effective method to reduce greenhouse gases ***,the effect of hydrogen addition on the low temperature metallurgical property of sinter is still unclear.A detailed investigation was performed on the above *** results are as *** CO is partially replaced by H2,the RDI〈3.15（RDI〈2.8） of sinter decreases with the increase of the H2 content;when the content of H2 increases,the CO,CO2 and N2 decrease proportionally,in this case,RDI〈3.15（RDI〈2.8） of sinter increases with the increase of H2 content;the value of RDI〈3.15（RDI〈2.8） basically depends on the reduction index（Ri）.The experimental data of RDI〈2.8 based on Japanese industrial standard（JIS） are a little higher than the data of RDI〈3.15 based on Chinese industrial standard（CIS） in the same *** addition,for part of CO is replaced by H2：RDI〈2.8=3.38394＋1.1585 RDI〈3.15;for other gases,except H2,are decreased proportionally：RDI〈2.8=17.39678＋0.42922 RDI〈3.15

关键词： sinter hydrogen reduction disintegration index (RDI) metallurgical property

Repair mechanism of astrocytes and non-astrocytes in spinal cord injury

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World Journal of Clinical Cases 2020年第5期8卷 854-863页

作者： Xiang-Yun Liu jian-wei guo jian-Qiang Kou Yuan-Liang Sun Xiu-Jun Zheng Department of Spinal Surgery The Affiliated Hospital of Qingdao University

BACKGROUND Spinal cord injury(SCI)is a destructive disease that incurs huge personal and social costs,and there is no effective *** the pathogenesis and treatment mechanism of SCI has always been a strong scientific focus,the pathogenesis of SCI is still under *** To determine the key genes based on the modularization of in-depth analysis,in order to identify the repair mechanism of astrocytes and non-astrocytes in *** Firstly,the differences between injured and non-injured spinal cord of astrocyte(HA),injured and non-injured spinal cord of non-astrocyte(FLOW),injured spinal cord of non-injured astrocyte(HA)and non-injured spinal cord of nonastrocyte(FLOW),and non-injured spinal cord of astrocyte(HA)and nonastrocyte(FLOW)were *** total number of differentially expressed genes was obtained by merging the four groups of differential ***,the genes were co-expressed and ***,the enrichment of GO function and KEGG pathway of module genes was ***,non-coding RNA,transcription factors and drugs that regulate module genes were predicted using hypergeometric *** In summary,we obtained 19 expression modules involving 5216 differentially expressed *** them,miR-494,XIST and other genes were differentially expressed in SCI patients,and played an active regulatory role in dysfunction module,and these genes were recognized as the driving genes of *** results showed that module genes were significantly involved in the biological processes of inflammation,oxidation and *** pathways such as NF-kappa B/A20,AMPK and MAPK were significantly *** addition,non-coding RNA pivot(including miR-136-5p and let-7d-5p,etc.)and transcription factor pivot(including NFKB1,MYC,etc.)were identified as significant regulatory dysfunction *** Overall,this study uncovered a co-expression network of key genes involved in astrocyte and non-astrocyte regulation in

关键词： Astrocyte Non-astrocyte Spinal cord injury Repair mechanism Dysfunction module Module genes

A distributed Grid-Xinanjiang model with integration of subgrid variability of soil storage capacity

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Water Science and Engineering 2016年第2期9卷 97-105页

作者： wei-jian guo Chuan-hai Wang Teng-fei Ma Xian-min Zeng Hai Yang PowerChina Huadong Engineering Corporation Limited Hangzhou 311122 China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai University Nanjing 210098 China College of Hydrology and Water Resources Hohai University Nanjing 210098 China

Realistic hydrological response is sensitive to the spatial variability of landscape properties. For a grid-based distributed rainfall-runoff model with a hypothesis of a uniform grid, the high-frequency information within a grid cell will be gradually lost as the resolution of the digital elevation model(DEM) grows coarser. Therefore, the performance of a hydrological model is usually scale-dependent. This study used the GridXinanjiang(GXAJ) model as an example to investigate the effects of subgrid variability on hydrological response at different scales. With the aim of producing a more reasonable hydrological response and spatial description of the landscape properties, a new distributed rainfall-runoff model integrating the subgrid variability(the GXAJSV model) was developed. In this model, the topographic index is used as an auxiliary variable correlated with the soil storage capacity. The incomplete beta distribution is suggested for simulating the probability distribution of the soil storage capacity within the raster grid. The Yaogu Basin in China was selected for model calibration and validation at different spatial *** demonstrated that the proposed model can effectively eliminate the scale dependence of the GXAJ model and produce a more reasonable hydrological response.

关键词： Scale effect Subgrid variability Soil storage capacity Incomplete beta distribution GXAJSV model

Synthesis of novel quaternary ammonium surfactants containing adamantane

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Chinese Chemical Letters 2012年第6期23卷 653-656页

作者： jian wei guo Xing Zhong Hua Zhu Li Juan Feng Ying De Cui Faculty of Chemical Engineering ＆ Light Industry Guangdong University of Technology Guangzhou 510006 China

A series of novel quaternary ammonium surfactants containing adamantane were designed and synthesized from 1-adamanta- necarboxylic acid. The structures of target surfactants were confirmed by 1H NMR, elements analysis and FFIR. Surface properties of these surfactants were investigated. Due to the lipophilicity of adamantane, the critical micelle concentration （CMC） and C2o values of the synthesized quaternary ammonium surfactants are lower than that of conventional quaternary ammonium surfactants.

关键词： Adamantane Synthesis Quaternary ammonium surfactants 1-(Alkyldimethylammoniamethyl) adamantane bromide

Antibacterial Thermoplastic Polyurethane/PL-DOSS Composite Films

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Chinese Journal of Polymer Science 2021年第8期39卷 1020-1028,I0007页

作者： Xiao Liu jian-wei guo Ya-Dong Liu Ming Liu Hui Liu Miao-Miao Han Sheng-Xiang Ji Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China

Medical devices-related infections pose a great threat to patients and cause an increased morbidity and mortality. Herein, we prepare an antibacterial composite(TPU-x) through blending medical grade thermoplastic polyurethane(TPU) and the complex(PL-DOSS) of ε-polylysine(ε-PL) and docusate sodium(DOSS). >99% reduction of colony forming unit(CFU) can be obtained in TPU-x composite films even at relatively low content of PL-DOSS, e.g. 0.13% for Methicillin resistant S. aureus(MRSA) and 0.5% for E. coli. The excellent antibacterial activity is mainly attributed to the formation of PL-DOSS nanoparticles that are uniformly dispersed in the TPU matrix with a size of ~100 nm. TPU-x composite films exhibit long-term stability in saline and good biocompatibility, and retain mechanical properties of TPU.

关键词： Nosocomial infections Antibacterial composite Solution blending Thermoplastic polyurethane Polylysine

Imaging findings of primary gastric plasmacytoma:A case report

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World Journal of Gastroenterology 2014年第29期20卷 10202-10207页

作者： Zhen-Hua Zhao jian-Feng Yang Jin-Dao Wang jian-guo wei Fang Liu Bo-Yin Wang Department of Radiology Shaoxing People’s Hospital Shaoxing Hospital of Zhejiang University Department of Gastroenterology Shaoxing People’s Hospital Department of Pathology Shaoxing People’s Hospital

Primary gastric plasmacytoma (GP) is a rare extramedullary plasmacytoma with clinical and imaging features that are common among other gastric tumors, such as gastric adenocarcinomas, gastric stromal tumors, and lymphomas. Here, we present a histologically conﬁrmed case of primary GP examined with biphasic computed tomography (CT), magnetic resonance imaging (MRI), and endosonography. A well-circumscribed extraluminal mass appearing as homogeneous attenuation/intensity with gradual enhancement was identified on biphasic enhancement CT and MRI. This mass was hyperintense on diffusion-weighted imaging and hypointense on the apparent diffusion coefficient map, implying that water diffusion in the mass was restricted. In addition, endosonography indicated a low echogenic mass in the gastric wall. These imaging findings increase the available knowledge about imaging of this disease and provide valuable information for differentiating primary GP from common gastric tumors.

关键词： Stomach Plasmacytoma Computed tomography, X-ray Magnetic resonance imaging Diffusion Endosonography

Unraveling the macroevolution of horseshoe bats(Chiroptera: Rhinolophidae: Rhinolophus)

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Zoological Research 2023年第1期44卷 169-182页

作者： wei-jian guo Yi Wu Kai He Yi-Bo Hu Xiao-Yun Wang Wen-Hua Yu Key Laboratory of Conservation and Application in Biodiversity of South China School of Life SciencesGuangzhou UniversityGuangzhouGuangdong 510000China CAS Key Laboratory of Animal Ecology and Conservation Biology Institute of ZoologyChinese Academy of SciencesBeijing 100101China

Unraveling the diversification mechanisms of organisms is a fundamental and important macroevolutionary question regarding the diversity,ecological niche, and morphological divergence of life. However, many studies have only explored diversification mechanisms via isolated factors. Here,based on comparative phylogenetic analysis, we performed a macroevolutionary examination of horseshoe bats(Chiroptera: Rhinolophidae:Rhinolophus), to reveal the inter-relationships among diversification, intrinsic/extrinsic factors, and climatic ecological niche characteristics. Results showed a general slowing trajectory during diversification, with two dispersal events from Asia into Southeast Asia and Africa playing key roles in shaping regional heterogeneous diversity. Morphospace expansions of the investigated traits(e.g., body size,echolocation, and climate niche) revealed a decoupled pattern between diversification trajectory and trait divergence, suggesting that other factors(e.g., biotic interactions) potentially played a key role in recent diversification. Based on ancestral traits and pathway analyses, most Rhinolophus lineages belonging to the same region overlapped with each other geographically and were positively associated with the diversification rate, implying a competitive prelude to speciation. Overall, our study showed that multiple approaches need to be integrated to address diversification history. Rather than a single factor, the joint effects of multiple factors(biogeography, environmental drivers, and competition) are responsible for the current diversity patterns in horseshoe bats, and a corresponding multifaceted strategy is recommended to study these patterns in the future.

关键词： Diversification Rhinolophus Historical biogeography Abiotic/Biotic factors Climatic niche characteristics Competition