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CHISELED NICKEL HYDROXIDE NANOPLATES GROWTH ON GRAPHENE SHEETS FOR LITHIUM ION BATTERIES
LEI-LEI TIAN,XIAN-YONG WEI,QUAN-CHAO ZHUANG,CHAO WU,RUI-LUN XIE,ZHI-MIN ZONG,YONG-LI CUI,SHI-GANG SUN 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2013 NANO Vol.8 No.6
The morphologies and structures of Ni(OH)2–graphene hybrid materials were tailored by using different mineralizers in this work. It was revealed that the synergic effects of the highly oxidized graphene sheets and the mineralizers played a crucial role in controlling the morphology and structure of the nanocomposites, and Na2CO3 is a very effective mineralizer for growing chiseled 2D nanoplates of Ni(OH)2 on graphene sheets. When produced with NaOH, fragmental Ni(OH)2 crystals with irregular shapes erratically decorated on graphene sheets. In contrast, chiseled Ni(OH)2 hexagonal nanoplates grown on graphene sheets were obtained when Na2CO3 was used as the mineralizer. These unique 2D–2D nanoarchitectures with higher contact area between the nanocrystals and graphene substrate can increase the interfacial interaction and then efficiently improve the structural stability of the composite material, thus exhibiting an enhanced Li storage capacity and excellent cycling performance of 562 mAh g-1 after the 36th cycle.
Xian-Lei Shi,Qianqian Hu,Yongju Chen,Feng Wang,Peigao Duan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.65 No.-
An ultra-high performance fiber, serving as a novel material for heterogeneous-acid catalyst for the conversion of biomass components to methyl levulinate, is presented. The catalyst was prepared conveniently from commercially available polyphenylene sulfide fiber by sulfonation, and characterized detailedly by elemental analysis, FTIR spectroscopy, SEM and mechanical strength at different stages. Moreover, the catalyst exhibited higher activity for biomass components transforming into methyl levulinate (52–96%), and prominent ability to be reused with good recyclability and stability. Furthermore, the effective large-scale process with fiber catalyst in impellers of the agitation system is very attractive for the industrial applications.
Xian-Lei Shi,Yongju Chen,Qianqian Hu,Wenqin Zhang,Chenxu Luo,Peigao Duan 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.53 No.-
A potential industrialized fiber catalyst for “click chemistry” via the one-pot multicomponent Cu(I)-catalyzed azide-alkyne cycloaddition (CuAAC) for the synthesis of 1,2,3-triazoles in water, is reported. Detailed characterization by appearance, mechanical properties, elemental analysis, FTIR spectroscopy, and SEM confirmed the rangeability of the fiber catalyst during the preparation and utilization processes. Moreover, the fiber catalyst-mediated reactions proceeded smoothly to afford triazoles with nearly quantitative yields in short time (15 min). Furthermore, the fiber catalyst has shown tandem activities and superior recyclability (over 10 cycles), and the procedure is operationally simple and amenable to the gram-scale on a simple fixed-bed reactor.
Xian-Lei Shi,Yongju Chen,Qianqian Hu,Feng Wang,Peigao Duan 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.60 No.-
An efficient, recyclable and large-scalable fiber-supported Fe(III) catalytic system verifed in the one-pot multicomponent Biginelli reactions, is presented. The fiber catalyst was prepared conveniently from commercially available polyacrylonitrile fiber according to a simple two-step procedure by amination and chelation in water, and characterized detailedly with ICP analysis, morphology, mechanical properties, elemental analysis, FTIR spectroscopy, and SEM during the modification and utilization processes. Moreover, the fiber catalyst-mediated reactions showed broad applicability and proceeded smoothly to afford a series of substituted 3,4-dihydropyrimidin-2-(1H)-ones/-thiones (yields 81–94%) in ethanol under mild conditions. Furthermore, the newly developed fiber catalyst held high strength, good flexibility and exhibited excellent stability and recyclability (over 10 cycles), and the procedure was operationally concise and effectively amenable to the gram-scale on a simple fixed-bed reactor with potential industrialization prospect.
Xian-Yong Lan,Chu-Zhao Lei,Yong-Tao Huai,Chuan-Ying Pan,Jing Wang,Yong-Zhen Huang,Hong Chen 한국유전학회 2011 Genes & Genomics Vol.33 No.6
Sine oculis homeobox homolog 3 (Six3) gene is responsible for normal mammalian pituitary development, and its genetic variations or deficiency will cause hypopituitarism, suggesting that this gene is a potential candidate gene for studying association with growth traits in animals. Herein, genetic variants within bovine Six3 gene was screened in 1031 individuals from four Chinese indigenous cattle breeds. Two novel polymorphisms (NC_007309:g.2515G>A and NC_007309:g.2607T>C) locating at positions nt1707 and nt1799 of intron 1 in bovine Six3gene, were found, and could be genotyped by TaqI ACRS PCR-RFLP and Alw26I PCR-RFLP, respectively. The frequencies of allele “A” of TaqI locus varied from 0.004 to 0.309,as well as the frequencies of allele “C” of Alw26I locus waved from 0.025 to 0.340. Association analysis revealed no significant association of TaqI locus with growth traits in Nanyang breed. However, significant relationships between Alw26I locus and body weight (BW) and average daily gain (ADG) in Nanyang breed was found (p<0.05). The individuals with genotype TC had greater body weight and average daily gain than those with genotype TT at 18 months old. Furthermore, based on combinated genotypes from these two loci, diplotypes was found to be associated with growth traits (p<0.05).The individuals with dihaplotype GG-TC had greater body weight and average daily gain at 18 month-old than those of other dihaplotypes. Therefore, the TaqI and Alw26I genetic variants of bovine Six3 gene were recommended as DNA markers related to growth traits through marker-assisted selection for genetics and breeding in cattle.
Modeling and Simulation of the Magnetic Method for High Voltage Direct Current Inspection Robot
Xian-jin Xu,Cheng-hui Liu,Yu Yan,Hao-da Chen,Lei Fang,Yun-long Wang,Long-hui Wu 한국자기학회 2018 Journal of Magnetics Vol.23 No.3
In order to solve the slipping problem of a two-arm-wheel combined inspection robot, a maglev system based on the magnetic field of a high voltage direct current (HVDC) is proposed. The magnetic system comprises of two parts: a magnetic levitation system and a magnetic drive system. The levitation component overcomes the gravity of the robot by the Ampere force generated by current-carrying coils in the magnetic field of HVDC. The drive component utilizes the Ampere force generated by current-carrying coils in the magnetic field of HVDC as the driving force. Simulation results of the model are compared with the calculated values. The results show that the magnetic levitation method and the magnetic drive method are theoretically feasible, and the model is accurate and effective, which is of great practical significance to the physical realization of the inspection robot.
Process Sequence Planning Modeling Based on Polychromatic Sets
Lei Qi,Li Xian-wang,Guo Wei-fei,Li Xiao-xin 보안공학연구지원센터 2016 International Journal of Grid and Distributed Comp Vol.9 No.9
In view of the existing sequence planning problem, this paper presents a process scheduling model based on polychromatic sets theory. To attain the similarity and individuality of constraints of parts, the process route decision was divided into stages. A feature machining chain and process feature ranking model were built beginning with the factors that influence the processing stage and technology feature. The adoption of polychromatic sets theory simplifies the evaluation of process constraints; thus, knowledge can be expressed easily. This method not only ensures the versatility of the system, but also satisfies the customer-oriented process resource.
Chong-lei Zhang,Guan-lu Jiang,Xian-feng Liu,Li-jun Su 대한토목학회 2018 KSCE Journal of Civil Engineering Vol.22 No.12
The objective of this study is to verify the feasibility of using centrifugal model tests to characterize the ground reaction response of a high-speed railway embankment to predict its ground settlement. To do so, a series of Centrifugal Model Tests (CMTs) of the embankment were performed to investigate the variation of ground reaction and corresponding derived modulus at different embankment ratios. The ground reaction determined from the CMTs was compared with those obtained from corresponding fullscale field tests of instrumented embankment. The results show that the ground reaction at the embankment centreline gradually approaches the embankment weight (γH) with increasing embankment ratio. Considering the embankment filling process with different embankment ratios, it seems inappropriate to employ the value of γH as the ground reaction without any correction in settlement prediction. Finally, the predictive capability of the proposed approach for embankment settlement estimation was assessed against the corresponding field measurements and those determined based on the calculation methods suggested in the current design standard in China. The results show that the proposed simple approach satisfactorily estimates the ground settlement of HSR embankments and its deviation of predicted settlements is below 11.9% compared with the data obtained from the field full-scale tests. However, the deviation of the result calculated by the current recommend design standard is 17.7%-148.3%.
Zhao, Xian-Da,He, Yu-Yu,Gao, Jun,Zhao, Chen,Zhang, Ling-Lin,Tian, Jing-Yuan,Chen, Hong-Lei Asian Pacific Journal of Cancer Prevention 2014 Asian Pacific journal of cancer prevention Vol.15 No.20
Background: The prognostic value of Bcl-2 protein expression in non-small cell lung cancer (NSCLC) is under debate. We therefore systematically reviewed the evidence for Bcl-2 protein effects on NSCLC survival to elucidate this issue. Materials and Methods: An electronic search in Pubmed and Embase complemented by manual searches in article references were conducted to identify eligible studies to evaluate the association between Bcl-2 protein expression and overall survival (OS) as well as disease free survival (DFS) of NSCLC patients. Combined hazard ratios (HRs) with corresponding 95% confidence intervals (95%CIs) were pooled using the random-effects model. Results: A total of 50 trials (including 52 cohorts) encompassing 7,765 patients were pooled in the meta-analysis regarding Bcl-2 expression and OS of NSCLC patients. High expression of Bcl-2 protein had a favorable impact (HR=0.76, 95%CI=0.67-0.86). In the group of Bcl-2 expression and DFS, 11 studies including 2,634 patients were included. The synthesized result indicated high expression of Bcl-2 protein might predict good DFS (HR=0.85, 95%CI=0.75-0.95). Conclusions: Our present meta-analysis demonstrated favorable prognostic values of Bcl-2 expression in patients with NSCLC. Further prospective trails are welcomed to validate the utility of assessing Bcl-2 in NSCLC patient management.