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A novel fluorescent epoxy resin for organophosphate pesticide detection

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Chinese Chemical Letters 2015年第1期26卷 39-42页

作者： Hong-xing Zhang Ren-Bo wei Chuan-Zhi Chen xin-Lin Tuo Xiao-gong Wang Department of Chemical Engineering Laboratory of Advanced Materials(MOE)Tsinghua University Department of Chemical Defense Institute of Chemical Defense

In this work,a novel bisbenzimidazolylpyridine-functionalized fluorescent epoxy resin was synthesized for organophosphate pesticide *** epoxy resin was characterized by Fourier-transform infrared spectroscopy（FT-IR）,proton nuclear magnetic resonance spectroscopy（~1H NMR）,gel permeation chromatography（CPC）,differential scanning calorimetry（DSC） and fluorescence *** loading with Eu（Ⅲ） ions,the epoxy resin showed a strong fluorescence *** fluorescence emission was observed to be instantaneously quenched when exposed to trace amount of diethyl chlorophosphate in *** Stern-Volmer quenching constants Ksv for quenching at617 nm was determined to be 0.377 × 10^3 L/*** sensitive emission-quenching function and easy processing nature of the polymeric support enable the resin to be a promising chemosensor candidate for the detection of organophosphates.

关键词： MeBIP Epoxy resin Europium complex Fluorescence quenching Organophosphates

Effective extraction of photoneutron cross-section distribution using gamma activation and reaction yield ratio method

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Nuclear Science and Techniques 2023年第11期34卷 103-111页

作者： Zhi‑Cai Li Yue Yang Zong‑wei Cao xin‑Xiang Li Yun Yuan Zong‑Qing Zhao gong‑Tao Fan Hong‑wei Wang Wen Luo School of Nuclear Science and Technology University of South ChinaHengyang 421001China Science and Technology on Plasma Physics Laboratory Laser Fusion Research CenterChina Academy of Engineering PhysicsMianyang 621900China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

Photoneutron cross-section(PNCS)data are important in various current and emerging *** a few sophis-ticated methods have been developed,there is still an urgent need to study the PNCS *** this study,we propose the extraction of PNCS distributions using a combination of gamma activation and reaction yield ratio *** verify the validity of the proposed extraction method,experiments for generating^(62,64)Cu and^(85m,87m)Sr isotopes via laser-induced pho-toneutron reactions were performed,and the reaction yields of these isotopes were *** the proposed extraction method,the PNCS distributions of^(63)Cu and^(86)Sr isotopes(leading to^(85m)Sr isotope production)were successfully *** extracted PNCS distributions were benchmarked against available PNCS data or TALYS calculations,demonstrating the validity of the proposed extraction *** applications for predicting the PNCS distributions of the 30 iso-topes are further *** conclude that the proposed extraction method is an effective complement to the available sophisticated methods for measuring and evaluating PNCS data.

关键词： Photonuclear data Photoneutron cross section Gamma activation Reaction yield TALYS calculation

Ring finger protein 157 is a prognostic biomarker and is associated with immune infiltrates in human breast cancer

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BIOCELL 2023年第10期47卷 2265-2281页

作者： xin ZHU BIN XIAO WENWU ZHANG XIAOYU SONG wei gong LINHAI LI xinPING CHEN School of Life Sciences Hainan UniversityHaikou570228China Department of Medical Laboratory Hainan Cancer HospitalAffiliated Cancer Hospital of Hainan Medical UniversityHainan Tropical Cancer Research InstituteHaikou570312China Department of Laboratory Medicine The Sixth Affiliated Hospital of Guangzhou Medical UniversityQingyuan People’s HospitalQingyuan511518China Graduate School Guangzhou University of Chinese MedicineGuangzhou510006China School of Pharmaceutical Sciences Hainan UniversityHaikou570228China

Background: The protein encoded by ring finger protein 157 (RNF157) is known to function as an E3 ubiquitinligase. However, whether the level of RNF157 expression in breast cancer correlates with prognosis and immune cellinfiltration among breast cancer patients remains to be further explored. Methods: In this study, publicly availabledatasets were used for evaluating RNF157 expression in different tumors compared with normal samples. Severalindependent datasets were screened for investigating the relationship between RNF157 and breast cancer survival,different mutation profiles, and tumor immune cell infiltration. We conducted a pathway enrichment analysis toidentify signaling pathways associated with RNF157. Results: Analysis of public and online databases revealed thatRNF157 expression markedly decreased in breast cancer tissue samples compared to non-carcinoma ***, immunohistochemistry assays also demonstrated this RNF157 down-regulation in breast cancer ***157 up-regulation could predict the improved survival of breast cancer cases. Further, different RNF157expression level groups exhibited different mutational profiles. Pathway enrichment profiling of RNF157-related genessuggested its possible involvement in regulating breast cancer via the mitogen-activated protein kinase (MAPK)pathway. RNA sequencing (RNA-seq) data and genomic enrichment analysis showed that RNF157 downregulatedseveral genes positively associated with the MAPK signaling pathway. We also explored RNF157 expression andimmune cell infiltration in breast cancer and found that RNF157 mRNA levels were negatively related to non-Timmune cell infiltration. Conclusion: According to our work, RNF157 may be a promising diagnostic biomarker andtherapeutic target for breast cancer.

关键词： RNF157 Prognosis Immune infiltrate MAPK signal pathway Breast cancer

Thermo-Rheological Structure and Passive Continental Margin Rifting in the Qiongdongnan Basin, South China Sea, China

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Journal of Ocean University of China 2022年第2期21卷 347-360页

作者： LI Chaoyang JIANG Xiaodian gong wei School of Ocean Science and Technology Dalian University of TechnologyPanjin 124221China Key Laboratory of Submarine Geosciences and Prospecting Techniques Ministry of Educationand College of Marine GeosciencesOcean University of ChinaQingdao 266100China Laboratory for Marine Mineral Resources Pilot National Laboratory for Marine Science and Technology(Qingdao)Qingdao 266237China

To investigate the thermo-rheological structure and passive continental margin rifting in the Qiongdongnan Basin(QDNB),thermo-rheological models of two profiles across the western and eastern QDNB are *** continental shelf of western QDNB,having the lowest crustal extension factor,is recognized as the initial non-uniform extension crust *** regime is referred to as the jelly sandwich-1(JS-1)regime,having a lower crustal ductile *** oceanward part of the western QDNB changes from the relatively strong JS-1 to the weak crème brûlée-1(CB-1)regime with a significantly thinned lower ***,the crustal extension in the eastern QDNB is significantly higher than that in the western QDNB,with conjugate faults extending deep into the lower *** central depression zone of the eastern QDNB is defined as the much stronger JS-2 regime,having a brittle deformation across the entire crust and upper mantle and characteristics of a cold and rigid oceanic *** the widespread lower crustal high-velocity layers(HVLs)in the northern margin of the South China Sea,the HVLs are confined to the lower crustal base of the central depression zone of the *** HVLs of QDNB are the results of non-uniform extension with mantle underplating during the lower crustal-necking stage,which is facilitated by the lower crustal ductile layer and derived by mantle lat-eral *** gigantic mantle low-velocity zone related to the Red River Fault should be a necessary factor for the east-west differential margin rifting process of QDNB,which may drive the lateral flowing in the mantle.

关键词： Qiongdongnan Basin thermo-rheological structure continental margin rifting high-velocity layer

Effects of slip length and hydraulic diameter on hydraulic entrance length of microchannels with superhydrophobic surfaces

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Frontiers in Energy 2020年第1期14卷 127-138页

作者： Wenchi gong Jun SHEN wei DAI Zeng DENG Xueqiang DONG Maoqiong gong Key Laboratory of Cryogenics Technical Institute of Physics and ChemistryChinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China

This paper investigated effects of slip length and hydraulic diameter on the hydraulic entrance length of laminar flow in superhydrophobic *** investigations were performed for square microchannels with Re ranging between 0.1 and *** is found that superhydrophobic microchannels have a longer hydraulic entrance length than that of conventional ones by nearly 26.62%at a low *** dimensionless hydraulic entrance length slightly increases with the increasing slip length at approximately Re<10,and does not vary with the hydraulic diameter.A new correlation to predict the entrance length in square microchannels with different slip lengths was developed,which has a satisfying predictive performance with a mean absolute relative deviation of 5.69%.The results not only ascertain the flow characteristics of superhydrophobic microchannels,but also suggest that super hydrophobic microchannels have more significant advantages for heat transfer enhancement at a low Re.

关键词： laminar flow hydraulic entrance length super hydrophobic surface slip length hydraulic diameter

FINITE ELEMENT APPROXIMATIONS FOR SCHRDINGER EQUATIONS WITH APPLICATIONS TO ELECTRONIC STRUCTURE COMPUTATIONS

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Journal of Computational Mathematics 2008年第3期26卷 310-323页

作者： xin-Gao gong Lihua Shen Dier Zhang Aihui Zhou Department of Physics Fudan University Shanghai 200433 China Institute of Mathematics and Interdisciplinary Science Department of Mathematics Capital Normal University Beijing 100037 China LSEC ICMSEC Academy of Mathematics and Systems Science Chinese Academy of Sciences Beijing 100190 China

In this paper, both the standard finite element discretization and a two-scale finite element discretization for SchrSdinger equations are studied. The numerical analysis is based on the regularity that is also obtained in this paper for the Schroedinger equations. Very satisfying applications to electronic structure computations are provided, too.

关键词： Error analysis Finite element Eigenvalue Quantum chemistry Schroedinger equation Two-scale

Spin-Dependent Electron Properties of a Triple-Terminal Quantum Dot Structure

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Communications in Theoretical Physics 2009年第12期52卷 1117-1124页

作者： HAN Yu gong wei-Jiang wei Guo-Zhu Department of Physics Liaoning University Shenyang 110036 China College of Sciences Northeastern University Shenyang 110004 China International Center for Material Physics Acadmia Sinica Shenyang 110015 China

Electron transport properties of a triple-terminal Aharonov-Bohm interferometer are theoretically *** applying a Rashba spin-orbit coupling to a quantum dot locally, we find that remarkable spin polarization comesabout in the electron transport process with tuning the structure parameters, i.e., the magnetic flux or quantum dotlevels. When the quantum dot levels are aligned with the Fermi level, there only appear spin polarization in thisstructure by the presence of an appropriate magnetic flux. However, in absence of magnetic flux spin polarization andspin separation can be simultaneously realized with the adjustment of quantum dot levels, namely, an incident electronfrom one terminal can select a specific terminal to depart from the quantum dots according to its spin state.

关键词： quantum dot electron transport Rashba interaction

Removal of Fulvic Acids from Aqueous Solutions via Surfactant Modified Zeolite

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Chemical Research in Chinese Universities 2006年第5期22卷 566-570页

作者： WANG Shu-guang gong Wen-xin LIU Xian-wei GAO Bao-yu YUE Qin-yan ZHANG Dong-hua School of Environmental Science and Engineering Shandong University Jinan 250100 P. R. China

A surfactant modified zeolite（ SMZ）, i. e. , a zeolite modified by using hexadecyl trimethyl ammonium bromide （HDTMA） was used to remove fulvic acids（FA） from aqueous solution. The effects of the relevant parameters, such as the loading level of HDTMA, the contact time, the initial FA concentration, the pH, and the types of the metal carious and organics were examined. The results show that SMZ with an HDTMA loading-level of 120% of the external cation exchange capacity（ECEC） of zeolite exhibits the best performance. Although the removal of fulvic acids by SMZ occurs rapidly within the first 30 min of the contact time, a contact time of at least 4 h is required to attain the adsorption equilibrium. The removal capacity of FA by SMZ decreases with the increase of the initial FA concentration. The pH has an effect on the FA removal efficiency because it can influence the characteristics of the FA molecules. The removal of FA is considerably enhanced by Ca^2＋ or Mg^2＋ ions and is adversely affected by phenol or pentachlorophenol（PCP）. Under the optimum conditions, 98% of FA could be removed by SMZ. Furthermore, the desorption of FA and the regeneration of SMZ were studied. The results show that a 30% ethanol solution is sufficient for the regeneration of SMZ.

关键词： Surfactant modified zeolite(SMZ) Fulvic acids(FA) removal Adsorption Desorption

Effect of local non-convexity on the critical shear strength of granular materials determined via the discrete element method

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Particuology 2020年第5期18卷 105-112页

作者： Zhihong Nie Shunkai Liu wei Hu Jian gong School of Civil Engineering Central South UniversityChangshaHunan 410075China Hunan Province Key Laboratory of Geotechnical Engineering Stability Control and Health Monitoring Hunan University of Science and TechnologyXiangtanHunan 411201China School of Hydraulic Engineering Changsha University of Science and Technology Changsha 410114China

Multi-sphere clumps are commonly used to simulate non-spherical particles in discrete element method *** is of interest whether the degree of local non-convexity λ affects the mechanical behaviour of granular materials with the same non-convexity η.A series of discrete-element-method biaxial shear tests are conducted on rough particle packings with rη=0.075 and different λ values(ranging from 0.134 to 0.770).The microscale results show that the contact type changes with an increase in λ.However,the critical strength is independent of λ.The evaluation of the contributions of different contact types to the critical shear strength and a detailed analysis of the anisotropies help clarify the microscopic mechanisms that result in the independence of the critical shear strength from λ.

关键词： Multi-sphere clump Local non-convexity Discrete element method Biaxial shear test Contact type Critical shear strength