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Chinese Chemical Letters 2021年第11期32卷 3440-3445页

作者： Yi Pan Fan-Feng deng Zheng Fang Han-Jiao Chen Zhou Long xian-deng hou Analytical Testing Center Sichuan UniversityChengdu 610064China Institute of Chemistry National Institute of Measurement and Testing TechnologyChengdu 610021China

Hydrogen fuel cells are among the promising energy sources worldwide,which could accomplish cyclic production of energy and avoid the emission of green-house or contaminative ***,sulfur compounds(SCs)even at trace level(nmol/mol)are usually involved in cell construction and further H_(2)production,which would cause degradation of the catalysts and shorten the lifetime of the fuel ***,the highly reactive SCs could cause varied species and concentrations of them in complex matrices,so online rather than offline analysis of SCs in H_(2)would be *** this context,we developed a new system combining online cryogenic preconcentration of nine SCs and subsequent determination by GC-SCD(sulfur chemiluminescent detector),with the correlation coefficients of the calibration curves higher than 0.999,calculated limits of detection no higher than 0.050 nmol/mol,analytical time around 30 min per sample,and satisfactory precision and accuracy(RSD<5%and SD<15%).The analytical performance was much better than or at least comparable to the previously reported and the developed system was successfully applied for real sample analysis.

关键词： Gas-chromatography Hydrogen fuel cell Online cryogenic trap Sulfur chemiluminescent detector Volatile sulfur compounds

A sensitive and compact mercury analyzer by integrating dielectric barrier discharge induced cold vapor generation and optical emission spectrometry

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Chinese Chemical Letters 2017年第2期28卷 189-196页

作者： An-Qin Leng Yun-Fei Tian Ming-Xuan Wang Li Wu Kai-Lai Xu xian-deng hou Cheng-Bin Zheng College of Chemistry Sichuan University Chengdu 610064 China Analytical & Testing Center Sichuan University Chengdu 610064 China

An environmentally friendly,low power consuming,sensitive and compact mercury analyzer was developed for the determination of mercury in water samples by integrating a thin film dielectric barrier discharge induced cold vapor reactor and a dielectric barrier discharge optical emission spectrometer into a small polymethyl methacrylate plate（10.5 cm length×8.0 cm width×1.2 cm height）.Mercury cold vapor was generated when standard or sample solutions with or without formic acid were introduced to the reactor to form thin film liquid and exposed to microplasma irradiation and subsequently separated from the liquid phase for transport to the microplasma and detection of its atomic *** of detection of 0.20 μg L^-1 and 2.6 μg L^-1 were obtained for the proposed system using or not using formic acid,*** to the conventional microplasma optical emission spectrometry used for mercury analysis,this system not only retains the good limit of detection amenable to the determination of mercury in real samples,but also reduces power consumption,eliminates the generation of hydrogen and avoids the use of toxic or unstable *** validation was demonstrated by analysis of a certified reference material of water sample and three real water samples with good spike recoveries（88-102%）.

关键词： Mercury Real time field analysis Microplasma Optical emission spectrometry Cold vapor generation Miniaturization

Comparative Study on Inorganic Composition and Crystallographic Properties of Cortical and Cancellous Bone

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Biomedical and Environmental Sciences 2010年第6期23卷 473-480页

作者： XIAO-YAN WANG,YI ZUO,DI HUANG,xian-deng hou,AND YU-BAO LI 2 Research Center for Nano-Biomaterials Analysis and Testing,Sichuan University,Chengdu 610064,Sichuan,China [a] Research Center for Nano-Biomaterials Analysis Testing Sichuan University Chengdu 610064 Sichuan China

Objective To comparatively investigate the inorganic composition and crystallographic properties of cortical and cancellous bone via thermal treatment under 700 ℃. Methods Thermogravimetric measurement, infrared spectrometer, X-ray diffraction, chemical analysis and X-ray photo-electron spectrometer were used to test the physical and chemical properties of cortical and cancellous bone at room temperature 250 ℃, 450 ℃, and 650 ℃, respectively. Results The process of heat treatment induced an extension in the a-lattice parameter and changes of the c-lattice parameter, and an increase in the crystallinity reflecting lattice rearrangement after release of lattice carbonate and possible lattice water. The mineral content in cortical and cancellous bone was 73.2wt% and 71.5wt%, respectively. For cortical bone, the weight loss was 6.7% at the temperature from 60 ℃ to 250℃, 17.4% from 250 ℃ to 450 ℃, and 2.7% from 450 ℃ to 700 ℃. While the weight loss for the cancellous bone was 5.8%, 19.9%, and 2.8 % at each temperature range, the Ca/P ratio of cortical bone was 1.69 which is higher than the 1.67 of stoichiometric HA due to the B-type CO32- substitution in apatite lattice. The CaJP ratio of cancellous bone was lower than 1.67, suggesting the presence of more calcium deficient apatite. Conclusion The collagen fibers of cortical bone were arrayed more orderly than those of cancellous bone, while their mineralized fibers ollkded similar. The minerals in both cortical and cancellous bone are composed of poorly crystallized nano-size apatite crystals with lattice carbonate and possible lattice water. The process of heat treatment induces a change of the lattice parameter, resulting in lattice rearrangement after the release of lattice carbonate and lattice water and causing an increase in crystal size and crystallinity. This finding is helpful for future biomaterial design, preparation and application.

关键词： Cortical bone Cancellous bone Bone mineral Composition Crystallographic property

High‑Entropy Electrode Materials:Synthesis,Properties and Outlook

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Nano-Micro Letters 2025年第1期17卷 472-506页

作者： Dongxiao Li Chang Liu Shusheng Tao Jieming Cai Biao Zhong Jie Li Wentao deng Hongshuai hou Guoqiang Zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China School of Chemistry and Chemical Engineering Hunan Institute of EngineeringXiangtan 411104People’s Republic of China

High-entropy materials represent a new category of high-performance materials,first proposed in 2004 and extensively investigated by researchers over the past two *** definition of high-entropy materials has continuously *** the last ten years,the discovery of an increasing number of high-entropy materials has led to significant advancements in their utilization in energy storage,electrocatalysis,and related domains,accompanied by a rise in techniques for fabricating high-entropy electrode ***,the research emphasis has shifted from solely improving the performance of high-entropy materials toward exploring their reaction mechanisms and adopting cleaner preparation ***,the current definition of high-entropy materials remains relatively vague,and the preparation method of high-entropy materials is based on the preparation method of single metal/low-or medium-entropy *** should be noted that not all methods applicable to single metal/low-or medium-entropy materials can be directly applied to high-entropy *** this review,the definition and development of high-entropy materials are briefly ***,the classification of high-entropy electrode materials is presented,followed by a discussion of their applications in energy storage and catalysis from the perspective of synthesis ***,an evaluation of the advantages and disadvantages of various synthesis methods in the production process of different high-entropy materials is provided,along with a proposal for potential future development directions for high-entropy materials.

关键词： High-entropy Energy storage Electrode materials

β-Ga_(2)O_(3)热电性能的第一性原理计算

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原子与分子物理学报 2025年第1期42卷 180-188页

作者：邓南发周贤中广东工业大学集成电路学院广州510006

通过使用第一性原理计算方法和玻尔兹曼输运理论,计算了β-Ga_(2)O_(3)的电学、热学和热电性质,并得出了热电性能因子随载流子浓度和温度的变化规律.此外,还考虑了声子散射和极性光学声子散射对平均电子弛豫时间的影响,并详细描述了不... 详细信息

通过使用第一性原理计算方法和玻尔兹曼输运理论,计算了β-Ga_(2)O_(3)的电学、热学和热电性质,并得出了热电性能因子随载流子浓度和温度的变化规律.此外,还考虑了声子散射和极性光学声子散射对平均电子弛豫时间的影响,并详细描述了不同载流子浓度和温度下β-Ga_(2)O_(3)的Seebeck系数、电导率、电热导率和功率因数的计算结果.最后,给出了β-Ga_(2)O_(3)的热电性能因子随载流子浓度和温度的变化趋势.结果表明,在高载流子浓度和高温下,β-Ga_(2)O_(3)具有较高的热电性能因子.

关键词： Ga_(2)O_(3) 第一性原理计算波尔兹曼输运理论热电性质

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A novel active-passive protection strategy endows carbonyl iron with excellent intelligent anti-corrosion and microwave absorption dual functional characteristics

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Nano Research 2025年第1期18卷 487-500页

作者： Wei Tian Quanyuan Feng Linbo Zhang Yinfan Liu xian Jian Longjiang deng Institute of Microelectronics School of Information Science and TechnologySouthwest Jiaotong UniversityChengdu 611756China National Engineering Researching Centre of Electromagnetic Radiation Control Materials Key Laboratory of Multi-Spectral Absorbing Materials and Structures of Ministry of EducationState Key Laboratory of Electronic Thin Films and Integrated DevicesSchool of Electronic Science and EngineeringUniversity of Electronic Science and Technology of ChinaChengdu 611731China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China The Yangtze Delta Region Institute(Huzhou)&School of Electronic Science and Engineering University of Electronic Science and Technology of ChinaHuzhou 313001China

Carbonyl iron absorbers(CI)face significant challenges in practical applications,such as corrosion,interface bonding failure,detachment,and high maintenance ***,we have developed intelligent self-healing technology based on proactive/passive mechanisms via in situ synthesis of self-healing factors(polydopamine/benzotriazole(PDA/BTA))and physical barrier layers(SiO_(2)/1,1,1,3,3,3-hexamethyl disilazane,SiO_(2)/HMDS)to enhance corrosion resistance,while also being compatible with efficient microwave absorption *** unique multiscale structure gives full play to the utilization of the roles of each functional layer,including the intelligent self-healing features of PDA/BTA,physical shielding and spatial confinement characteristics of SiO_(2)/HMDS,and magnetic-dielectric synergistic mechanism resulted from the good impedance matching characteristics,the conduction loss,the interfacial polarization loss and natural *** asfabricated composites achieved an exceptional minimum reflection loss value of-55.4 dB at 10.7 GHz and the effective absorption band of 7.6 ***,it still exhibits obvious self-healing and corrosion resistance characteristics after 360 h corrosion treatment,ascribed to the self-healing mechanism of PDA/BTA and the blocking intervention effect of SiO_(2)/*** work is considered to pave the way for the synthesis of high-performance magnetic absorbers,especially in enhancing their intelligent self-healing ability in corrosive environments.

关键词： microwave absorption intelligent self-healing technology carbonyl iron multiscale structure magneticdielectric synergistic mechanism

Illuminating single genomic loci in live cells by reducing nuclear background fluorescence

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Science China(Life Sciences) 2021年第5期64卷 667-677页

作者： Song Lu Dianbing Wang Yu hou Dongge Guo Yulin deng xian-En Zhang School of Life Sciences Beijing Institute of TechnologyBeijing 100081China National Laboratory of Biomacromolecules CAS Center for Excellence in BiomacromoleculesInstitute of BiophysicsChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Beijing 100049China

The tagging of genomic loci in living cells provides visual evidence for the study of genomic spatial organization and gene ***/dCas9(clustered regularly interspaced short palindromic repeats/deactivated Cas9)labeling system labels genes through binding of the dCas9/sgRNA/fluorescent protein complex to repeat sequences in the target genomic ***,the existence of numerous fluorescent proteins in the nucleus usually causes a high background fluorescent *** study aims to limit the number of fluorescent modules entering the nucleus by redesigning the current CRISPR/dCas9-SunTag labeling system consisting of dCas9-SunTag-NLS(target module)and scFv-sfGFP-NLS(signal module).We removed the nuclear location sequence(NLS)of the signal module and inserted two copies of EGFP into the signal *** ratio of the fluorescent intensity of the nucleus to that of the cytoplasm(N/C ratio)was decreased by 71%,and the ratio of the signal to the background(S/B ratio)was increased by 1.6 *** system can stably label randomly selected genomic loci with as few as 9 repeat sequences.

关键词： CRISPR/dCas9 labeling background reduction low-repetitive loci live cell imaging

Flowering time regulation mediated by protein arginine methylation

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Flowering time regulation mediated by protein arginine methy...

Stability for discrete-time uncertain systems with infinite Markov jump and time-delay

第十三届全国植物基因组学大会

作者： Yong Zhang~1,Lianfeng Gu~1,Chunyan Liu~1,Xiong Xu~2,Lifang Niu~1,Falong Lu~1,Taolan Zhao~1, xian deng~1,Yifeng hou~1,Yi Zhang~2,Xiaofeng Cao~(1*) 1 National Key Laboratory of Plant Genomics and Center for Plant Gene Research,Institute of Genetics and Developmental Biology,Chinese Academy of Sciences,Beijing,China 100101 2 Appreciate The Beauty Of Life,INC,Wuhan,China 430079

Protein arginine methylation plays an essential role in regulating transcription,RNA processing,nuclear transport,DNA-damage repair and signal *** methylation is catalyzed by a small group of protein arginine methyltr...

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Science China(Information Sciences) 2021年第5期64卷 100-110页

作者： Ting hou Yueying LIU Feiqi deng School of Mathematics and Statistics Shandong Normal University College of Mathematics and Systems Science Shandong University of Science and Technology School of Automation Science and Engineering South China University of Technology

In this paper, we developed a stability analysis for discrete-time uncertain time-delay systems governed by an infinite-state Markov chain(DUTSs-IMC). Some sufficient conditions for the considered systems to be exponential stability in mean square with conditioning(ESMS-C) are derived via linear matrix inequalities(LMIs), which can be examined conveniently. Under novel sufficient conditions, the equivalence among asymptotical stability in mean square(ASMS), stochastic stability(SS), exponential stability in mean square(ESMS), and ESMS-C has been established. Besides, numerical simulations are employed in result validation.

关键词： infinite jump time-delay parametric uncertainties exponential stability in mean square with conditioning stochastic stability

In-Plane Dynamic Crushing Behaviors of a Vertex-Based Hierarchical Auxetic Honeycomb

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Acta Mechanica Solida Sinica 2024年第1期37卷 53-62页

作者： Yichen Zan Xiuhui hou Zichen deng School of Mechanics Civil Engineering and ArchitectureNorthwestern Polytechnical UniversityXi'an 710072China MIIT Key Laboratory of Dynamics and Control of Complex Systems Northwestern Polytechnical UniversityXi'an 710072China School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China State Key Laboratory of Structural Analysis Optimization and CAE Software for Industrial EquipmentDalian University of TechnologyDalian 116024China

Auxetic metamaterials,which exhibit the negative Poisson’s ratio(NPR)effect,have found wide applications in many engineering ***,their high porosity inevitably weakens their bearing capacity and impact *** improve the energy absorption efficiency of auxetic honeycombs,a novel vertex-based hierarchical star-shaped honeycomb(VSH)is designed by replacing each vertex in the classical star-shaped honeycomb(SSH)with a newly added self-similar *** analytical model is built to investigate the Young’s modulus of VSH,which shows good agreement with experimental results and numerical *** in-plane dynamic crushing behaviors of VSH at three different crushing velocities are investigated,and empirical formulas for the densification strain and plateau stress are *** results reveal more stable deformation modes for VSH,attributed to the addition of self-similar star-shaped ***,compared with SSH under the same relative densities,VSH exhibits better specific energy absorption and higher plateau ***,VSH is verified to be a better candidate for energy absorption while maintaining the auxetic *** study is expected to provide a new design strategy for auxetic honeycombs.

关键词： Vertex-based hierarchical star-shaped honeycomb Auxetic honeycomb Energy absorption Plateau stress Negative Poisson's ratio