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Charge Transport Processes of Immobilized Heteropolyanions at Self-assembled Monolayer Modified Gold Electrode by Electrochemical Quartz Crystal Microbalance Measurement

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Chemical Research in Chinese Universities 2009年第4期25卷 537-542页

作者： BU Xin-yuan JIAO lian-sheng HAN Dong-xue YANG Gui-fu State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun 130022 P. R. China School of Computer Science Northeast Normal University Changchun 130024 P. R. China

The in situ electrochemical quartz crystal microbalance（EQCM） technique was used to investigate the ion transport of immobilized heteropolyanions at a self-assembled monolayer（SAM） modified gold electrode during electrochemical redox process.A mixed transfer method was presented to analyse the abnormal change of resonant frequency based on the simultaneous insertion/extraction of different *** results indicate that the migration of HSO4-anions was indispensable in the redox process of the heteropolyanions in a 1 mol/L H2SO4 solution and played a key role in the abnormal change of the resonant *** a change was attributed to different packing densities derived by means of differently immobilized methods.

关键词： Heteropolyanion Charge transport Self-assembled monolayer Electrochemical quartz crystal microbalance

Modification of the (SiO2/MgO/MgCl2)·TiClx Ziegler-Natta Polyethylene Catalysts Using the Third Metal Elements

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Chinese Journal of Polymer Science 2017年第6期35卷 739-751页

作者： Ting fu 程瑞华 xue-lian He Zhen Liu Zhou Tian 刘柏平 State Key Laboratory of Chemical Engineering East China University of Science and Technology

Various （SiO2/MgO/MgCl2）·TiClx Ziegler-Natta catalysts modified by the third metal elements were synthesized by the co-impregnation of water-soluble magnesium and the third metal salts. Several key factors including the electronegativity of the third metal elements, catalyst performances in ethylene homo-polymerization, ethylene/1-hexene copolymerization and hydrogen response were systematically investigated. Both the catalyst performance and the polymer properties are influenced by the introduction of the third metal elements. Compared with the unmodified （SiO2/MgO/MgCl2）·TiClx Ziegler-Natta catalyst, activity and 1-hexene incorporation are enhanced by the introduction of zirconium, vanadium, aluminum and chromium, while deteriorated by the addition of ferrum, nickel, molybdenum and tungsten. Correlations of the catalyst activities and 1-hexene incorporation ability with the electronegativity of the third metal elements are discovered. It is found that the lower electronegativity of the third metal elements leads to the catalyst with higher activity and higher α-olefin co-polymerization ability. The polyethylene produced by a nickel modified catalyst showed broad molecular weight distribution （MWD） and the lowest average molecular weight （MW）, while by using a ferrum modified catalyst, the resulting polyethylene had the highest MW, reaching the ultra-high MW area. Vanadium and chromium modified catalysts demonstrated the best hydrogen response.

关键词： Polyethylene Ziegler-Natta polymerization Copolymerization Kinetics

An enhanced differential evolution-based inverse radiation transport model for identification of unknown shielding layer thicknesses with gamma-ray spectrum

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Nuclear Science and Techniques 2017年第6期28卷 161-168页

作者： Ying Chen lian-Ping Zhang xue Sai Meng-fu Wei Lun-Qiang Wu Jian-Min Hu Institute of Materials China Academy of Engineering Physics Science and Technology on Surface Physics and Chemistry Laboratory

Identifying the geometric information of an object by analyzing the detected radiation fields is an important problem for national and global *** the present work,an inverse radiation transport model,based on the enhanced differential evolution algorithm with global and local neighborhoods(IRT-DEGL),is developed to estimate the unknown layer thickness of the source/shield system with the gamma-ray *** framework is briefly introduced with the emphasis on handling the enhanced differential evolution *** the simulated gamma-ray spectra,the numerical precision of the IRT-DEGL model is evaluated for one-dimensional source *** the detected gamma-ray spectra,the inverse investigations for the unknown thicknesses of multiple shielding layers are *** comparing with the traditional gamma-ray absorption method,it is shown that the IRT-EDGL model can provide a much more accurate result and has great potential to be applied for the complicated systems.

关键词： Inverse radiation transport y Spectrometry Multi-shielding layers Differential evolution with local and global neighborhoods

Phylogenetic Analysis of mtDNA from the Ancient Human of Yuan Dynasty in Inner Mongolia in China

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Chemical Research in Chinese Universities 2006年第2期22卷 177-180页

作者： fu Yu-qin XU xue-lian ZHANG Xiao-lei ZHANG Quan-chao ZHOU Hui ZHU Hong Ancient DNA Laboratory Research Center for Chinese Frontier Archaeology Jilin UniversityChangchun 130012 P. R. China College of Life Science Jilin University 130021 P. R. China

A study of the genetic structure of an ancient human excavated from the Yikeshu site of Yuanshangdu ancient city in Inner Mongolia and the relationships between the ancient population and the extant populations was carried out. Sequences of the control region and coding region of mtDNA from the ancient human were analyzed by using direct sequencing and restriction-fragment length polymorphism （RFLP） methods, Phylogenetic analysis and multidimensional scaling analysis were also performed on the mtDNA data of the ancient population and 12 extant populations. These results show that the ancient individuals of Yikeshu site can be assigned to D, G, B and Z haplogroups that are prevalent in Duars and Mongolians from Inner Mongolia. The ancient population is also closer to Duar and Mongolian populations in genetic distance than other compared populations. This study reveals that the ancient population from Yikeshu site in the Yuan Dynasty shares a common ancestor with Mongolic-speaking Daur and Mongolian tribes.

关键词： MtDNA Polymorphism Phylogenetic analysis

Surface reconstruction of heterostructures in alkaline medium towards enhanced electrocatalytic hydrogen evolution

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Rare Metals 2024年第6期43卷 2636-2647页

作者： Ming-Yang Yang Ji Yuan xue-lian fu Jing-Jing Chen Jing Hu Zhou-Guang Lu Chen Liu Guangdong Research Center for Interfacial Engineering of functional Materials Shenzhen Key Laboratory of Polymer Science and TechnologyShenzhen Key Laboratory of Energy Electrocatalytic MaterialsCollege of Materials Science and EngineeringShenzhen UniversityShenzhen 518060China Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials Department of Materials Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China

Constructing heterostructures has proved to be a successful strategy to fabricate electrocatalysts with high efficiency for water ***,the structure evolution in alkaline hydrogen evolution reaction lacks investigation and the specific active center remains ***,we take the well-designed Ni_(3)S_(2)@VO_(2) heterostructures as a model to investigate the electrocatalytic activity and the surface reconstruction process of heterostructure catalysts in alkaline *** Ni_(3)S_(2)@VO_(2) heterostructures,with Ni_(3)S_(2) nanorods as the core and VO_(2) nanoflakes as the shell,coupled with the high conductive Ni_(3)S_(2),the hydrophilic VO_(2) and modulated electronic structures at the interfaces,exhibited prominent activity and superior stability at various current ***,the ex-situ characterizations confirmed that the surface reconstruction from Ni_(3)S_(2)@VO_(2) into Ni_(3)S_(2)@amorphous-Ni(OH)_(2) in alkaline media could optimize the water dissociation barrier and exposed large active area,thereby contributing to improved electrocatalytic *** study not only introduces novel high-performance electrocatalysts for hydrogen evolution reaction(HER),but also provides a new avenue for re-examining hetero-structural catalysts in alkaline solutions.

关键词： Heterostructures Ni_(3)S_(2)@VO_(2) Surface reconstruction Water dissociation Alkaline hydrogen evolution

Morphological,Biochemical and Genetic Analysis of a Brittle Stalk Mutant of Maize Inserted by Mutator

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Journal of Integrative Agriculture 2013年第1期12卷 12-18页

作者： fu xue-qian FENG Jing YU Bin GAO You-jun ZHENG yong-lian YUE Bing National Key Laboratory of Crop Genetic Improvement/Huazhong Agricultural University Biomass and Bioenergy Research Centre Huazhong Agricultural University

Mutants on stalk strength are essential materials for the studies on the formation of plant cell *** this study,a brittle stalk mutant of maize,designated as Bk-x,was screened from a Mutator inserted mutant *** the germination and early seedling stage,the mutant plants were indistinguishable from the normal ***,all of the plant organs were brittle after the 5th-leaf stage and remained brittle throughout the rest of the growing *** observation showed that the cell wall in vascular bundle sheath of Bk-x was thinner than that in normal *** leaf mechanical strength in Bk-x was 77.9% of that in normal plants growing at Xishuangbanna（BN）,Yunnan province and that was 61.7% in Wuhan（WH）,Hubei Province,*** proportion of cellulose was 12.3% in Bk-x,which was significantly lower than that in normal plants（26.7%）,while the soluble sugar content was 36.1% in Bk-x,which is significantly higher than that in normal plants（12.4%）.Genetic analysis using two F 2 populations and one F 2：3 families demonstrated that the trait of brittle stalk is controlled by a single recessive gene.

关键词： Mutator cellulose brittle stalk mutant cell wall mechanical strength

An Effective Approach for the Preparation of High Performance Thermal Conductive Polymer Composites Containing Liquid Metal

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Chinese Journal of Polymer Science 2024年第7期42卷 992-1001,I0010页

作者： Xin Chen xue-Zhong Zhang Yi-Fei Yuan Chuan-liang Chen lian-Hu Xiong Qiang fu Hua Deng College of Polymer Science and Engineering State Key Laboratory of Polymer Materials EngineeringSichuan UniversityChengdu610065China Department of Materials Science and Engineering Sichuan University-Pittsburgh InstituteSichuan UniversityChengdu610065China

The preparation of high-performance thermal conductive composites containing liquid metals(LM)has attracted significant ***,the stable dispersion of LM within polymer solution and effective property contribution of liquid metals remains significant challenges that need to be *** by the properties of the dendritic structure of the tree root system in grasping the soil,“shear-induced precipitation-interfacial reset-reprotonation”processing strategy is proposed to prepare nanocomposites based on aramid micron fibers(AMFs)with hierarchical dendritic *** to the combination of van der Waals force provided by hierarchical dendritic structure,electrostatic interaction between AMFs and LM,coordinative bonding of―NH to LM,together with interfacial re-setting and multi-step protonation,several features can be achieved through such strategy:conducive to the local filler network construction,improvement of interfacial interaction,improvement of the stability of filler dispersion in the solvent,and enhancement of mechanical and thermal properties of the *** resulting AMFsp H=4/LM films demonstrate a thermal conductivity of 10.98 W·m^(-1)·K^(-1)at 70%filler content,improvement of 126.8%compared to ANFs/LM film;while maintaining a strength of~85.88 MPa,improvement of 77%compared to AMFs/LM *** also possess insulation properties,enable heat dissipation for high power *** work provides an effective strategy for the preparation of high performance polymer composites containing liquid metal.

关键词： Shear-induced Reprotonation AMFs LM Filler dispersion

Heterotopic pregnancy after assisted reproductive techniques with favorable outcome of the intrauterine pregnancy:A case report

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World Journal of Clinical Cases 2023年第3期11卷 669-676页

作者： Ya-Nan wan. lian-Wen Zheng Lu-Lu fu Ying Xu xue-Ying Zhang Department of Obstetrics and Gynecology Reproductive Medical CenterThe Second Hospital of Jilin UniversityChangchun 130000Jilin ProvinceChina

BACKGROUND Heterotopic pregnancy(HP)is a rare condition in which both ectopic and intrauterine pregnancies *** is uncommon after natural conception but has recently received more attention due to the widespread use of assisted reproductive techniques(ART)such as ovulation promotion *** SUMMARY Here,we describe a case of HP that occurred after ART with concurrent tubal and intrauterine singleton *** was treated successfully with surgery to preserve the intrauterine pregnancy,resulting in the birth of a low-weight premature *** case report aims to increase awareness of the possibility of HP during routine first-trimester ultrasound examinations,especially in pregnancies resulting from ART and even if multiple intrauterine pregnancies are *** This case alerts us to the importance of comprehensive data collection during regular *** is important for us to remind ourselves of the possibility of HP in all patients presenting after ART,especially in women with an established and stable intrauterine pregnancy that complain of constant abdominal discomfort and also in women with an unusually raised human chorionic gonadotropin level compared with simplex intrauterine *** will allow symptomatic and timeous treatment of patients with better results.

关键词： Heterotopic pregnancy Assisted reproductive techniques Preterm labor Premature rupture of membranes Case report

Effect of cognitive behavioral group therapy on rehabilitation of community patients with schizophrenia:A short-term randomized control trial

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World Journal of Psychiatry 2023年第8期13卷 583-592页

作者： xue-lian Chen Xiao-Ting Deng fu-Gang Sun Qing-Jun Huang Medical College of Shantou University Shantou 515041Guangdong ProvinceChina Chronic Disease Prevention and Control Center(Mental Health Center)of Longhua District Shenzhen 518110Guangdong ProvinceChina Mental Health Center Shantou UniversityShantou 515041Guangdong ProvinceChina

BACKGROUND The efficacy of cognitive behavioral group therapy(CBGT)for cognitive dysfunction and negative symptoms of schizophrenia is established,but more evidence is *** To assess the effectiveness of CBGT combined with mental health education as a treatment for schizophrenia compared with mental health education *** In all,120 schizophrenia out-patients were randomized into CBGT combined with mental health education or single mental health *** primary outcomes were positive and negative symptoms,cognitive function,excitatory factor,anxiety and depression symptom improvements on the positive and negative syndrome scale *** outcome measures included social function and drug *** There were significant differences between CBGT combined with mental health education and single mental health education on measures of positive and negative symptoms,cognitive functions,excitatory factor,anxiety and depression symptoms,and social *** other significant difference in outcomes was *** CBGT combined with mental health education may be relevant beneficial treatment method in reducing symptoms,cognitive and social functions of patients with schizophrenia.

关键词： Schizophrenia Cognitive behavioral group therapy Family members Social functions Mental health Community Psychological intervention