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| 1 | Sedum alfredii H:A new Zn hyperaccumulating plant first found in China显示文摘Field survey and greenhouse experiments were carried out to identify and characterize zinc (Zn) uptake and accumulation by a new Zn hyperaccumulating plant species (Sedum alfredii Hance) native to China. Zinc concentration in the shoots of Sedum alfredii Hance grown on an ancient mined area ranged from 4134 to 5000 mg/kg, with a mean of 4515 mg/kg. It suggests that Sedum alfredii could not only grow on heavily Pb/Zn contaminated soils, but also could accumulate extraordinarily high concentration of Zn. Under nutrient solution culture conditions, Sedum alfredii Hance grew healthy at Zn supplying levels from 0.006 to 240 mg · L-1. Zinc concentration in the shoots increased with external Zn levels increasing. The Zn concentration and accumulation in the shoots reached the highest at Zn supply level of SO mg/L, with 19.67 g/kg and 19.83 nig/plant, respectively. All the results showed that Sedum alfredii Hance is a new Zn hyperaccumulating plant. This provides a new plant material to explore mechanism of | YANG Xiao’e LONG Xinxian NI Wuzhong FU Chenxin | 2002 | Chinese Science Bulletin2002，47，19： | 50 |
| 2 | Two-substrate vertical deposition for stable colloidal crystal chips显示文摘By combining vertical deposition with micro- molding in capillaries method, we have demonstrated the two-substrate vertical deposition, an alternative and versatile procedure for fabricating high-quality stable colloidal crystal chips. Apparent bright colors, special UV-vis spectra, scan- ning electron microscopy (SEM) and atomic force micros- copy (AFM) images all prove that high-quality colloidal crystal structures are formed in between the two substrates. During the two-substrate vertical deposition for colloidal crystal chips, capillary force and evaporation of the medium are critical to the formation of the colloidal crystals; while the confinement in between two close substrates makes the resulting colloidal crystal chips more stable. Due to the ex- cellent stability, these colloidal crystal chips can be used to construct some composite optical devices via a simpler and more flexible process. Meanwhile, they can also be further used as the templates for ordered multiporous materials. | CHENXin SUNZhiqiang CHENZhimin ZHANGKai YANGBai | 2005 | Chinese Science Bulletin2005，50，8： | 13 |
| 3 | Direct electron transfer of glucose oxidase on the carbon nanotube electrode显示文摘The direct electron transfer of glucose oxidase (GOx) immobilized onto the surface of the carbon nanotube (CNT)-modified glassy carbon (CNT/GC) electrode is reported. The di-rect electron transfer rate of GOx is greatly enhanced when it was immobilized onto the surface of CNT/GC electrode. Cyclic voltammetric results show a pair of well-defined and nearly sym-metric redox peaks, which corresponds to the direct electron transfer of GOx, with the formal potential 0()E, which is almost independent on the scan rates, of about 0.456 V (vs. SCE) in the phosphate buffer solution (pH 6.9). The apparent heterogeneous electron transfer rate con-stant (ks) of GOx at the CNT/GC electrode surface is estimated to be (1.74 ?0.42) s-1, which is much higher than that reported previously. The dependence of 0E on solution pH indicates that the direct electron transfer of GOx is a two-electron-transfer coupled with two-proton-transfer reaction process. The experimental results also demonstrate that the immobilized GOx retains its bioelectrocatalytic activity toward the oxidation of glucose. The method presented here can be easily extended to obtain the direct electrochemistry of other enzymes or proteins. | CAI Chenxin CHEN Jing LU Tianhong | 2004 | Science China Chemistry2004，47，2： | 11 |
| 4 | In-pit coal mine personnel uniqueness detection technology based on personnel positioning and face recognition显示文摘Since the coal mine in-pit personnel positioning system neither can effectively achieve the function to detect the uniqueness of in-pit coal-mine personnel nor can identify and eliminate violations in attendance management such as multiple cards for one person, and swiping one's cards by others in China at present. Therefore, the research introduces a uniqueness detection system and method for in-pit coal-mine personnel integrated into the in-pit coal mine personnel positioning system, establishing a system mode based on face recognition + recognition of personnel positioning card + release by automatic detection. Aiming at the facts that the in-pit personnel are wearing helmets and faces are prone to be stained during the face recognition, the study proposes the ideas that pre-process face images using the 2D-wavelet-transformation-based Mallat algorithm and extracts three face features: miner light, eyes and mouths, using the generalized symmetry transformation-based algorithm. This research carried out test with 40 clean face images with no helmets and 40 lightly-stained face images, and then compared with results with the one using the face feature extraction method based on grey-scale transformation and edge detection. The results show that the method described in the paper can detect accurately face features in the above-mentioned two cases, and the accuracy to detect face features is 97.5% in the case of wearing helmets and lightly-stained faces. | Sun Jiping Li Chenxin | 2013 | International Journal of Mining Science and Technology2013，23，3： | 9 |
| 5 | Real-time collision dynamics of vector solitons in a fiber laser显示文摘Particle-like structures of solitons, as a result of the balance between dispersion and nonlinearity, enable remarkable elastic and inelastic soliton collisions in many fields. Despite the experimental observation of temporal vector-soliton collisions in birefringent fibers, collision dynamics of vector solitons in fiber lasers have not been revealed before, to the best of our knowledge. Here, the real-time spectral evolutions of vector solitons during collisions in a dual-comb fiber laser, which generates vector solitons with slightly different repetition rates, are captured by a time-stretch dispersive Fourier transform technique. We record the whole process of vector-soliton collisions, including the formation of weak pulses induced by cross-polarization coupling, opposite central wavelength shifts of both vector solitons, distinct intensity redistribution and dissipative energy, and gradual recovery to initial states. Furthermore, extreme collisions with strong four-wave mixing sidebands are observed by virtue of coherent coupling between the orthogonal polarization components of vector solitons. Numerical simulations match well with the experimental observations. The experimental and numerical evidences of vector-soliton collision dynamics could give insight into the understanding of nonlinear dynamics in fiber lasers and other physical systems, as well as the improvement of laser performance for application in dual-comb spectroscopy. | Kangjun Zhao Chenxin Gao Xiaosheng Xiao Changxi Yang | 2021 | Photonics Research2021，9，3： | 4 |
| 6 | LincRNA1230 inhibits the differentiation of mouse ES cells towards neural progenitors显示文摘In vitro, mouse embryonic stem(ES) cells can differentiate into many somatic cell types, including neurons and glial cells. When cultured in serum-free medium, ES cells convert spontaneously and efficiently to a neural fate. Previous studies have shown that the neural conversion of mouse ES cells includes both the participation of neural-specific transcription factors and the regulation of epigenetic modifications. However, the intracellular mechanism underlying this intrinsic transition still remains to be further elucidated. Herein, we describe a long intergenic non-coding RNA, Linc RNA1230, which participates in the regulation of the neural lineage specification of mouse ES cells. The ectopic forced expression of Linc RNA1230 dramatically inhibited mouse ES cells from adopting a neural cell fate, while Linc RNA1230 knockdown promoted the conversion of mouse ES cells towards neural progenitors. Mechanistic studies have shown that Linc RNA1230 inhibits the activation of early neural genes, such as Pax6 and Sox1, through the modulation of bivalent modifications(tri-methylation of histone3 lysine4 and histone3 lysine27) at the promoters of these genes. The interaction of Linc RNA1230 with Wdr5 blocked the localization of Wdr5 at the promoters of early neural genes, thereby inhibiting the enrichment of H3K4me3 modifications at these loci. Collectively, these findings revealed a crucial role for Linc RNA1230 in the regulation of the neural differentiation of mouse ES cells. | Chenxin Wang Guoping Li Yukang Wu Jiajie Xi Jiuhong Kang | 2016 | Science China(Life Sciences)2016，59，5： | 4 |
| 7 | Tunnel personnel positioning method based on TOA and modified location-fingerprint positioning显示文摘To position personnel in mines, the study discussed in this paper built on the tunnel personnel positioning method on the basis of both TOA and location-finger print(LFP) positioning. Given non-line of sight(NLOS) time delay in signal transmission caused by facilities and equipment shielding in tunnels and TOA measurement errors in both LFP database data and real-time data, this paper puts forth a database data de-noising algorithm based on distance threshold limitation and modified mean filtering(MMF), as well as a real-time data suppression algorithm based on speed threshold limitation and MMF.On this basis, a nearest neighboring data matching algorithm based on historical location and the speed threshold limitation is used to estimate personnel location and realize accurate personnel positioning.The results from both simulation and the experiment suggest that: compared with the basic LFP positioning method and the method that only suppresses real-time data error, the tunnel personnel positioning methods based on TOA and modified LFP positioning permits effectively eliminating error in TOA measurement, making the measured data close to the true positional data, and dropping the positioning error:the maximal positioning error in measurements from experiment drops by 9 and 3 m, respectively, and the positioning accuracy of 3 m is achievable in the condition used in the experiment. | Sun Jiping Li Chenxin | 2016 | International Journal of Mining Science and Technology2016，26，3： | 2 |
| 8 | Origin of High Efficiency and Long-Term Stability in Ionic Liquid Perovskite Photovoltaic显示文摘Environment-friendly protic amine carboxylic acid ionic liquids(ILs)as solvents is a significant breakthrough with respect to traditional highly coordinating and toxic solvents in achieving efficient and stable perovskite solar cells(PSCs)with a simple one-step air processing and without an antisolvent treatment approach.However,it remains mysterious for the improved efficiency and stability of PSCs without any passivation strategy.Here,we unambiguously demonstrate that the three functions of solvents,additive,and passivation are present for protic amine carboxylic acid ILs.We found that the ILs have the capability to dissolve a series of perovskite precursors,induce oriented crystallization,and chemically passivate the grain boundaries.This is attributed to the unique molecular structure of ILs with carbonyl and amine groups,allowing for strong interaction with perovskite precursors by forming C=O…Pb chelate bonds and N-H…I hydrogen bonds in both solution and film.This finding is generic in nature with extension to a wide range of IL-based perovskite optoelectronics. | Lingfeng Chao Tingting Niu Hao Gu Yingguo Yang Qi Wei Yingdong Xia Wei Hui Shouwei Zuo Zhaohua Zhu Chengjie Pei Xiaodong Li Jing Zhang Junfeng Fang Guichuan Xing Hai Li Xiao Huang Xingyu Gao Chenxin Ran Lin Song Li Fu Yonghua Chen Wei Huang | 2020 | Research2020，，1： | 2 |
| 9 | Single-walled carbon nanotubes functionalized with poly(nile blue A) and their application to dehydrogenase-based biosensors显示文摘 | Pan Du Shuna Liu Ping Wu Chenxin Cai | 2007 | 53:1811-18232007，53，： | 1 |
| 10 | Direct electron transfer of glucose oxidase promoted by carbon nanotubes显示文摘 | Chenxin Cai Jing Chen | 2004 | Analytical Biochemistry2004，，332： | 1 |
| 11 | Influence of sintering temperature and holding time on the densification, phase transformation, microstructure and properties of hot pressing WC–40<ce:hsp sp='0.25'/>vol.%Al 2 O 3 composites显示文摘 | Haixia Qu Shigen Zhu Qian Li Chenxin Ouyang | 2011 | Ceramics International2011，，2： | 1 |
| 12 | PVAm-PIP/PS composite membrane with high performance for CO2/N2 separation显示文摘 | Qiao Zhihua Wang Zhi Zhang Chenxin | 2013 | AICHE J2013，59，1： | 1 |
| 13 | Microstructure evolution and growth mechanism of core-shell silicon-based nanowires by thermal evaporation of SiO显示文摘Core-shell structured SiC@SiO_(2)nanowires and Si@SiO_(2)nanowires were prepared on the surface of carbon/carbon(C/C)composites by a thermal evaporation method using SiO powders as the silicon source and Ni(NO3)2 as the catalyst.The average diameters of SiC@SiO_(2)nanowires and Si@SiO_(2)nanowires are about 145 nm,and the core-shell diameter ratios are about 0.41 and 0.53,respectively.The SiO_(2)shells of such two nanowires resulted from the reaction between SiO and CO and the reaction of SiO itself,respectively,based on the model analysis.The growth of these two nanowires conformed to the vapor-liquid-solid(VLS)mode.In this mode,CO played an important role in the growth of nanowires.There existed a critical partial pressure of CO(pC)determining the microstructure evolution of nanowires into whether SiC@SiO_(2)or Si@SiO_(2).The value of pC was calculated to be 4.01×10^(-15) Pa from the thermodynamic computation.Once the CO partial pressure in the system was greater than the pC,SiO tended to react with CO,causing the formation of SiC@SiO_(2)nanowires.However,the decomposition of SiO played a predominant role and the products mainly consisted of Si@SiO_(2)nanowires.This work may be helpful for the regulation of the growth process and the understanding of the growth mechanism of silicon-based nanowires. | Bing LIU Jia SUN Lei ZHOU Pei ZHANG Chenxin YAN Qiangang FU | 2022 | Journal of Advanced Ceramics2022，11，9： | 1 |
| 14 | Electrocatalysis of NADH oxidation with electropolymerized film of nile blue A显示文摘 | CAI Chenxin XUE Kuanhong | 1997 | Anal Chim Acta1997，343，： | 1 |
| 15 | Novel biodegradable flocculating agents prepared byphosphate modification of konjac显示文摘 | XIE Chenxin FENG Yujun CAO Weiping | 2007 | CarbohydratePolymers2007，67，4： | 1 |
| 16 | ZnS Quantum Dots Derived a Reagentless Uric Acid Biosensor显示文摘 | Zhang Fenfen Lia Chenxin Lia Xiaohua | 2006 | Talanta2006，68，4： | 1 |
| 17 | β- and α-Bi 2 O 3 nanoparticles synthesized via microwave-assisted method and their photocatalytic activity towards the degradation of rhodamine B显示文摘 | Qianqian Huang Suning Zhang Chenxin Cai Bo Zhou | 2010 | Materials Letters2010，，： | 1 |
| 18 | Fast hashing and rotationsymmetric functions 显示文摘 | Pieprzyk J Qu Chenxin | 1999 | Journal Universal ComputerScience1999，5，1： | 1 |
| 19 | Catalytic Oxidation of Reduced Nicotinamide Adenine Dinucleotide at A Microband Gold Electrode Modified with Nickel Hexacyanoferrate显示文摘 | Cai Chenxin Ju Huangxian chen Hongyuan | 1995 | Anal Chim Acta1995，310，： | 1 |
| 20 | Polyaniline nanofi- bers: Synthesis, characterization, and application to direct electron transfer of glucose oxidase 显示文摘 | Zhao Min Wu Xiuming Cai Chenxin | 2009 | Journal of Physical Chemistry C2009，113，12： | 1 |
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