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A tactile and airflow motion sensor based on flexible double-layer magnetic cilia

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Microsystems & Nanoengineering 2023年第1期9卷 127-135页

作者： Jiandong Man Junjie Zhang Guangyuan Chen ning xue Jiamin Chen State Key Laboratory of Transducer Technology Aerospace Information Research InstituteChinese Academy of Sciences100190BeijingPeople’s Republic of China School of Electronic Electrical and Communication EngineeringUniversity of Chinese Academy of Sciences100049BeijingPeople’s Republic of China

Inspired by the concept of bionics,a tactile and airflow motion sensor based on flexible double-layer magnetic cilia is developed,showing extremely high sensitivity in both force and airflow *** upper layer of the magnetic cilia is a flexible material mixed with magnetic particles,while the lower layer is a pure flexible *** double-layer structure significantly improves magnetism while maintaining cilia *** addition,a metal tube pressing(MTP)method is proposed to overcome the difficulties in preparing large aspect ratio(over 30:1)cilia,offering simplicity and avoiding the use of large-scale MEMS *** developed sensor has a detection range between 0 and 60µN with a resolution of 2.1µN for micro *** also shows great detection ability for airflow velocity with a sensitivity of 1.43µT/(m/s).Experiments show that the sensor could be applied in surface roughness characterization and sleep apnea monitoring.

关键词： layer double motion

Crystal and Molecular Structure of 2,3,5,6-Bis(ortho-1,10-decylidene)dihydropyrazine

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Chinese Journal of Structural Chemistry 2005年第11期24卷 1254-1258页

作者： WANG Ming-An ZHANG ning HOU xue-Tai WANG Dao-Quan Department of Applied Chemistry China Agricultural University Beijing 100094 China

The SnCl2 reduction of 2-nitrocyclododecanone or 2-bromo-12-nitrocyclododecanone gave a colorless compound 2,3,5,6-bis（ortho-1,10-decylidene）dihydropyrazine 1a characterized by IR, NMR and X-ray diffraction analysis. Crystal data for 1a： Mr = 358.60, monoclinic, space group P2 1/n, α = 0.48028（3）, b = 2.8646（4）, c = 0.77097（6） nm, β = 98.432（12）°, V = 1.04924（19） nm^3, Dc = 1.135 g/cm^3, Z = 2, F（000） = 400 and μ（MoKa） = 0.065 mm^-1. All ^1H- and ^13C-NMR resonance lines of 1a were assigned by DEPT, COSY, HMQC and HMBC technology. In the crystal, the dihydropyrazine ring has a planar structure, two twelve-membered tings adopt [lene2333] conformation, their double bonds have cis-configuration, and the whole molecule has a center of symmetry. In solution, the symmetric ^1H- and ^13C-NMR signals suggest that two twelve-membered rings of 1a may adopt enantiomorphous [ lene2333] conformation existing in a dynamic equilibrium.

关键词： 2,3,5,6-bis(ortho-1,10-decylidene)dihydropyrazine crystal structure NMR

Dual-mode emission of single-layered graphene quantum dots in confined nanospace： Anti-counterfeiting and sensor applications

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Nano Research 2018年第4期11卷 2034-2045页

作者： Liqian Bai ning xue Yufei Zhao Xinrui Wang Chao Lu Wenying Shi ing University of Chemical Technology 15 Beisanhuan East Road Beijing 100029 China Key Laboratory of Photochemical Conversion and Optoelectronic Materials Technical Institute of Physics and Chemistry Chinese Academy of Sciences Beijing 100190 China Beijing Key Lab of Plant Resource Research and Development Beijing Technology and Business University Beijing 100048 China

Engineering of the luminescent properties for graphene quantum dots （GQDs） presents two enormous challenges： 1） The bandgap of GQDs is mainly determined by structural defects （size, shape, and the fraction of sp2 and sp3 domains）, which results in non-stoichiometric nature; 2） the preparation methods limit the achievement of an accurate chemical structure of GQDs, leading to many controversial explanations over the relationship between the structural defects and bandgaps. Here, single-layered GQDs with an exact structure are obtained by in-situ reaction of intercalated precursors in the confined nanospace of layered double hydroxides （LDHs）. Subsequently, the structure-property relationship is uncovered, demonstrating the enhanced fluorescence and activated room temperature phosphorescence of the as-pre- pared GQDs-LDHs, which originate from synergistic effects： 1） strong confine- ment provided by the nanospace of LDHs; 2） rich O-containing functional groups on the surface of GQDs resulting from LDH catalysis. Moreover, the colorless nature and dual-emission characteristics of GQDs-LDHs satisfy the preconditions as anti-counterfeiting markers for protecting valuable documents （bank notes, commercial invoices, etc.）. Particularly, owing to the low toxicity of GQDs and the edible property of LDHs, the GQDs-LDHs/gelatin capsules could be the new generation of potential green anti-counterfeiting material in the field of food and drugs.

关键词： graphene quantum dots dual-mode emission confinement sensors anti-counterfeiting

Preparation and properties of calcium sulfate bone cement incorporated with silk fibroin and Sema3A-Ioaded chitosan microspheres

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Frontiers of Materials Science 2015年第1期9卷 51-65页

作者： Peng WANG Bin PI Jin-ning WANG xue-Song ZHU Hui-Lin YANG Department of Orthopedic Surgery the First Affiliated Hospital of Soochow University Suzhou 215006 China

To search for new bioactive materials which can be used as the substitute of bone repairing and drug carriers, Sema3A-Ioaded chitosan microspheres （SLCM） and silk fibroin （SF） were mixed with calcium sulfate cement （CSC）. SEM, particle size analysis and swelling rate determination were performed to study properties of the microspheres. The drug loading, encapsulation efficiency and drug release rate were determined by ELISA. Microspheres with different SLCM weight contents （0.5%, 1% and 5%） were prepared to determine which one has the strongest mechanical properties and the appropriate setting time. It was revealed that CSC/SF/0.5SLCM has satisfactory mechanical properties, and its in vitro biocompatibility was assessed by MTS. Chitosan microspheres （5-18 μm） were globular, the surface was smooth, and the swelling rate is （77.02 ± 5.57）%. With this formula, the setting time was increased with the addition of SLCM in CSCISF, and the cumulative drug release rate is 44.62% in 28 d. XRD results demonstrate that the main component is calcium sulfate. Also it was found that CSCiSFI 0.5SLCM supports the growth of MC3T3 cells. Thus the preparation of CSCISFIO.5SLCM was reliable, and the products had good structures, physical properties and biocompatibility, appearing to be a promising bone substitute material.

关键词： Sema3A chitosan microsphere sustained release silk fibroin (SF) bone cement

Anilido-imine Zinc Complexes： Efficient Catalysts for Ring-opening Polymerization ofL-Lactide

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Chemical Research in Chinese Universities 2013年第1期29卷 48-50页

作者： YAO Wei CUI ning xue Ying-zhao LIU Tian-tian WANG Yan School of Resources and Environment University of Jinan Jinan 250022 P. R. China

A series of anilido-imine zinc complexes ortho-C6H4（CH：NAr）（NAr）ZnEt[Ar=2,6-Me2C6H3（2a）; Ar=2,6-Et2C6H3（2b）] was synthesized, characterized and used as catalysts for the ring-opening polymerization of L-lactide in the presence of benzyl alcohol. The effects of the structures of catalysts and reaction conditions on the reactivity were investigated. The polymerization of L-lactide initiated by each of these complexes was found to take place with a controlled manner.

关键词： Anilido-imine ligand Zinc complex Ring-opening polymerization Lactide

Growth and Common Prosperity in China

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China & World Economy 2022年第1期30卷 28-57页

作者： Nanak Kahwani Xiaobing Wang ning xue Peng Zhan School of Economics Renmin University of ChinaChina School of Economics University of New South WalesAustralia Department of Economics University of ManchesterUK Department of Economics and Related Studies University of YorkUK Institute for Common Prosperity and Development Zhejiang UniversityChina

This paper introduces a decomposition method that quantifies the contributions to common prosperity of labor market performance and social policies and extends the idea of shared prosperity to a new measure of inequity in *** resulting common prosperity indices and opportunity equality indices are then applied to five waves of the Chinese Household Income Project data from 1988 to *** paper shows that the labor market performance and social policies have been improving over the last 30 years and have helped China move towards common prosperity for *** indices developed in this paper allow us to quantify the extent of shared prosperity that a country has achieved and to carry out empirical studies on which policy is working and which is *** can also help us identify the fundamental causes of inequality and aid us in achieving equality in opportunity among all members of society.

关键词： common prosperity income growth inequity in opportunity labor market social policies

Effect of wastewater treatment processes on the pyrolysis properties of the pyrolysis tars from sewage sludges

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Journal of Thermal Science 2011年第2期20卷 167-172页

作者： Wu Xia Xie Li-ping Li Xin-yu Dai Xiao-hong Fei xue-ning Yuan-guangt School of Environment ＆ Chemical Engineering Tianjin Polytechnic University Tianjin 300160 China Department of Environmental and Municipal Engineering Tianjin Institute of Urban Construction Tianjin 300384 China

The pyrolysis properties of five different pyrolysis tars, which the tars from 1# to 5# are obtained by pyrolyzing the sewage sludges of anaerobic digestion and indigestion from the A2/O wastewater treatment process, those from the activated sludge process and the indigested sludge from the continuous SBR process respectively, were studied by thermal gravimetric analysis at a heating rate of 10 ℃/min in the nitrogen atmosphere. The results show that the pyrolysis processes of the pyrolysis tars of 1#, 2#, 3# and 5# all can be divided into four stages: the stages of light organic compounds releasing, heavy polar organic compounds decomposition, heavy organic compounds decomposition and the residual organic compounds decomposition. However, the process of 4# pyrolysis tar is only divided into three stages: the stages of light organic compounds releasing, decomposition of heavy polar organic compounds and the residual heavy organic compounds respectively. Both the sludge anaerobic digestion and the "anaerobic" process in wastewater treatment processes make the content of light organic compounds in tars decrease, but make that of heavy organic compounds with complex structure increase. Besides, both make the pyrolysis properties of the tars become worse. The pyrolysis reaction mechanisms of the five pyrolysis tars have been studied with Coats-Redfern equation. It shows that there are the same mechanism functions in the first stage for the five tars and in the second and third stage for the tars of 1#, 2#, 3# and 5#, which is different with the function in the second stage for 4# tar. The five tars are easy to volatile.

关键词： sewage sludge pyrolysis tar pyrolysis wastewater treatment process anaerobic digestion

Sila-annulated terrylene diimides for balanced ambipolar transporting

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Chinese Chemical Letters 2023年第8期34卷 311-314页

作者： Kai Chen ning xue Guogang Liu Yujian Liu Jiajing Feng Wei Jiang Zhaohui Wang Key Laboratory for Advanced Materials and Institute of Fine Chemicals School of Chemistry&Molecular EngineeringEast China University of Science and TechnologyShanghai 200237China School of Science China University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Organic Optoelectronics and Molecular Engineering Department of ChemistryTsinghua UniversityBeijing 100084China

The key building blocks,tetrachlorinated terrylene diimides and the targeted sila-annulated terrylene diimides(Si-TDIs and 2Si-TDIs)were synthesized for the first ***-crystal analysis verified the almost planar molecular configurations of both Si-TDIs and *** exhibited intriguing optical properties including red-shifted absorption and near-infrared emission properties with excellent fluorescence quantum yields,as well as precisely controlled HOMO/LUMO energy levels by *** single-crystal organic field-effect transistors based on 2Si-TDI 5a featuring long and branched alkyl chains demonstrated well-balanced ambipolar transporting properties with electron/hole mobilities of 0.10/0.18 cm2 V^(−1)s^(−1).

关键词： Terrylene diimides Si-heteroannulation Ambipolar transporting Single-crystal OFETs Organic electronics

Physiological and Growth Responses of Tomato Progenies Harboring the Betaine Alhyde Dehydrogenase Gene to Salt Stress

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Journal of Integrative Plant Biology 2007年第5期49卷 628-637页

作者： Shu-Feng Zhou Xian-Yang Chen Xing-ning xue Xin-Guo Zhang Yin-Xin Li Key Laboratory of Photosynthesis and Environmental Molecular Physiology Institute of Botany the Chinese Academy of Sciences Beijing 100093 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China

The responses of five transgenic tomato （Lycopersicon esculentum Mill） lines containing the betaine aldehyde dehydrogenase （BADH） gene to salt stress were evaluated. Proline, betaine （N, N, N-trimethylglycine, hereafter betalne）, chlorophyll and ion contents, BADH activity, electrolyte leakage （EL）, and some growth parameters of the plants under 1.0% and 1.5% NaCl treatments were examined. The transgenic tomatoes had enhanced BADH activity and betaine content, compared to the wild type under stress conditions. Salt stress reduced chlorophyll contents to s higher extent in the wild type than in the transgenic plants. The wild type exhibited significantly higher proline content than the transgenic plants at 0.9% and 1.3% NaCh Cell membrane of the wild type was severely damaged as determined by higher EL under salinity stress. K^＋ and Ca^2＋ contents of all tested lines decreased under salt stress, but the transgenic plants showed a significantly higher accumulation of K^＋ and Ca^2＋ than the wild type. In contrast, the wild type had significantly higher CI- and Na^2＋ contents than the transgenic plants under salt stress. Although yield reduction among various lines varied, the wild type had the highest yield reduction. Fruit quality of the transgenic plants was better in comparison with the wild type as shown by a low ratio of blossom end rot fruits. The results show that the transgenic plants have improved salt tolerance over the wild type.

关键词： betaine aldehyde dehydrogenase activity betaine contents salt tolerance tomato transgenic plants.