Siping, China

Jilin Normal University

www.jlnu.edu.cn
Siping, China

Jilin Normal University is a university in Siping, Jilin, northeast China.It was formerly known as the Siping Normal Institute .It is a very important and major normal university in Jilin Province, Northeast of China.This university was founded in the year of 1958. It is Jilin provincial teachers training center and it has trained more than 2,2000 teachers in recent years via various types of seminars and classes. From foundation up to the present, this school has cultivated more than 80,000 all kinds of talents for the nation.Jilin Normal University covers more than 920,000 square metres totally and its building area covers more than 500,000 square meters. The campus environment is extremely good with advanced basic teaching facilities. It has 22 colleges, 2 teaching sections, 27 research institutions and 117 labs now. Its teaching staff contains 1493 persons, wherein 994 persons are full-time teachers. There are 10 doctorate tutors, 230 master degree tutors, 212 professors and 210 associate professors teaching 55 undergraduate majors in this school now. For more information, please visit http://www.jlnu.edu.cn the website.We the member of Jilin Normal University welcome friends and students from all over the world. Wikipedia.


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Chang L.,Jilin Normal University | Chen S.,Jilin Normal University | Li X.,Harbin Institute of Technology
Applied Surface Science | Year: 2012

A general fabricating protocol for the preparation of core-shell magnetic molecularly imprinted polymers (MIPs) for chlorinated phenols recognition is described. In this protocol, Fe 3O 4 magnetic nanoparticles were first prepared using the chemical co-precipitation method. Then, the obtained magnetic nanoparticles were coated with a silica shell through modified Stöber method. Finally, MIP films were coated onto the surface of silica-modified magnetic nanoparticles by surface molecular imprinting technique. The resultant polymers showed a high saturation magnetization value (31.350 emu g -1), and short response time (30 s). Meanwhile, the as-synthesized magnetic MIPs showed an excellent recognition and selection properties toward imprinted molecule over structurally related compounds. © 2012 Elsevier B.V.


Liu B.,Northeast Normal University | Liu B.,Jilin Normal University | Yang J.,Northeast Normal University | Yang G.-C.,Changchun University of Technology | Ma J.-F.,Northeast Normal University
Inorganic Chemistry | Year: 2013

Four novel polyoxometalate-based copper(I)-organic frameworks, namely, [CuI 2(cis-L1)2][CuI 2(trans-L1)2Mo6O18(O 3AsPh)2] (1), [CuI 4(L2) 4Mo6O18(O3AsPh)2] (2), [CuI 4(L3)4Mo6O18(O 3AsPh)2] (3), and [CuI 4(L4) 2Mo6O18(O3AsPh)2] (4) (L1 = 1,3-bis(1,2,4-triazol-1-yl)propane, L2 = 1,4-bis(1,2,4-triazol-1-yl)butane, L3 = 1,5-bis(1,2,4-triazol-1-yl)pentane, and L4 = 1,6-bis(1,2,4-triazol-1-yl) hexane), have been successfully synthesized under hydrothermal conditions. Their structures have been determined by single-crystal X-ray diffraction analyses and further characterized by elemental analyses, infrared spectra (IR), UV-vis spectra, powder X-ray diffraction (PXRD), and thermogravimetric (TG) analyses. Compound 1 is composed of two crystallographically independent and distinct polymeric motifs: one-dimensional (1D) S-shaped chain and two-dimensional (2D) undulated layer. The S-shaped chains penetrated into the 2D parallel layers to generate an unusual 1D + 2D → three-dimensional (3D) polypseudo-rotaxane framework. In 2, the As2Mo6 polyoxoanions in tetradentate modes link four neighboring -L2-Cu-L2- chains to produce a rare 3D trinodal (3,4)-connected self-penetrated framework with Point Symbol of (8 3)2(82·124). In 3, adjacent CuI atoms are linked by As2Mo6 polyoxoanions and L3 ligands into a 2D layer. The layers are further interlocked by the two nearest neighboring ones to form a 3D polycatenated framework. In 4, L4 ligands bridge four CuI atoms to yield 2D wavelike layers, which are further linked by the octadentate As2Mo6 polyoxoanions to form a 3D tetranodal (3,4,6)-connected framework with Point Symbol of (6 3)(4·63·82)(64· 82)(42·62·810· 10). In addition, the photocatalytic activities of compounds 1, 3, and 4 for decomposition of methylene blue (MB) under UV light have been investigated. Moreover, their electrochemical properties have also been studied in 1 M H 2SO4 aqueous solution. © 2012 American Chemical Society.


Sun Y.M.,Jilin Normal University
Journal of Alloys and Compounds | Year: 2011

Multicomponent Fe68-xNixZr15Nb 5B12 (x = 5, 10, 15, 20) alloy powders milled for 60 h were prepared by mechanical alloying (MA). The structure and crystallization behavior were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and differential thermal analysis (DTA). Ni enhances the amorphisation of alloy powders. Particle size increases with increasing Ni content. Both onset crystallization temperature Tx and the first crystallization peak temperature Tp of the four alloys shift to a higher temperature with increasing heating rate while melting temperature (Tm) is just the opposite. Fe68-xNixZr 15Nb5B12 (x = 5, 10, 15, 20) alloys all have a large supercooled liquid region ΔTx. The supercooled liquid region ΔTx increases and the crystallization activation energy E decreases with increasing Ni content. © 2010 Elsevier B.V. All rights reserved.


Chang L.M.,Jilin Normal University | Duan X.Y.,Jilin Normal University | Liu W.,Jilin Normal University
Desalination | Year: 2011

The activated carbon (AC) electrode was prepared and carbonized at 850°C for electrosorption desalination. As a result, the electrical double-layer capacitance of AC electrode was improved by 2.16 times by carbonization. In order to improve the desalination performance of AC electrode, it was modified by loading titania with sol-gel method. The electrodes were analyzed using scanning electron microscope (SEM), X-ray fluorescence (XRF), X-ray diffraction (XRD) and electrochemical workstation. The results revealed that there was a certain amount of titania on the surface of modified AC electrode, which was accumulated on the surface of electrode forming some flocculent substance and its crystalline phase was rutile. After modification, the forming rate of electrical double-layer and electrosorption capacity of AC electrode were obviously improved and its desalination ratio was increased by 62.7%, whereas physical adsorption was decreased. In addition, compared with AC electrode, activated carbon fiber (ACF) electrode, and carbon nanotube (CNT) electrode, the AC loaded titania (AC-TiO2) electrode exhibited relatively higher desalination and desorption ratios as well as a reasonable cost. Therefore, the AC-TiO2 electrode would be suitable for the application of electrosorption desalination in the practical industry. © 2011 Elsevier B.V.


Liu C.-B.,Jilin Normal University | Li Q.,Jiangsu University | Wang X.,Jiangsu University | Che G.-B.,Jilin Normal University | Zhang X.-J.,Jilin Normal University
Inorganic Chemistry Communications | Year: 2014

A series of one-dimensional coordination polymers assembled from LnNO 3 · 6H2O (Ln = Sm(1), Eu(2), Tb(3), La(4), Ce(5), Pr(6), Nd(7), Dy(8)), quinoline-2,3-dicarboxylic acid (2,3-H2qldc) and 1,10-phenanthroline (phen) formulated as [Ln(2,3-qldc)(3-qlc)(phen)] n (3-Hqlc = quinoline-3-carboxylic acid) were obtained under hydrothermal conditions. It is remarkable that in situ hydrothermal decarboxylation was observed during preparing these polymers. Complexes 1-8 were characterized by elemental analyses, IR spectroscopy and single crystal X-ray diffraction analyses. The thermal stabilities and photoluminescence properties of these complexes have been investigated. © 2013 Elsevier B.V. All rights reserved.


Duan X.,Jilin Normal University | Tian L.,Jilin Normal University | Liu W.,Jilin Normal University | Chang L.,Jilin Normal University
Electrochimica Acta | Year: 2013

The electrochemical oxidation behavior of 4-Chlorophenol (4-CP) on a vitreous carbon electrode was investigated in acidic (1 M H2SO 4, pH 0.4), neutral (1 M Na2SO4, pH 6.9), and alkaline (1 M NaOH, pH 12.0) mediums containing 1-5 mM of 4-CP, at different temperatures between 25 and 85 °C, by cyclic voltammetry technique. The results indicate that the 4-CP was oxidized more easily in alkaline medium than acidic and neutral mediums, and the oxidation peaks of 4-CP shifted toward lower potential values by increasing temperature and 4-CP concentration. Successive scans led to the inactivation of vitreous carbon electrode as a result of the forming of polymeric films whatever the pH, the temperature and the 4-CP concentration used, but the inactivation of electrode surface was more easily induced in neutral and acidic mediums rather than alkaline medium and was retarded significantly when performed at the temperatures higher than 45 °C. Additionally, the 4-CP oxidation process at vitreous carbon electrode was controlled by diffusion except at higher concentration (50, 100 mM) where it is limited by adsorption. © 2013 Elsevier Ltd. All rights reserved.


Chang L.,Jilin Normal University | Tian L.,Jilin Normal University | Liu W.,Jilin Normal University | Duan X.,Jilin Normal University
Corrosion Science | Year: 2013

A layer containing dicalcium phosphate dihydrate (DCPD) and β-Ca3(PO4)2 was prepared on magnesium alloy by hydrothermal treatment of micro-arc oxide (MAO) layer. The biocorrosion resistance of the oxide layers before and after hydrothermal treatment was analyzed by anodic polarization and electrochemical impedance spectroscopy (EIS) in Hank's solution. The prepared MAO layers consisted mainly of MgO and MgAl2O4, and Ca and P inside the oxide layers existed with amorphous phase. Hydrothermal treatments not only made the amorphous Ca and P change into DCPD and β-Ca3(PO4)2 crystals, but also improved the biocorrosion resistance of magnesium alloys, especially the pitting corrosion resistance. © 2013 Elsevier Ltd.


ABSTRACT: The mechanism of cleft palate induction by dexamethasone is not fully known. Bone morphogenetic protein-2 (BMP-2) has been associated with dexamethasone-induced osteoporosis. In this study, the authors induced cleft palate models in Institute of Cancer Research mice by dexamethasone to investigate the role of BMP-2 and its transcriptional element GATA-6. The authors injected different doses of dexamethasone into pregnant mice (E13), and assessed the histology of the palatal shelf and the expression levels of BMP-2, GATA-6, and specific apoptosis-related proteins. The results showed that cleft palate formation was dependent on dexamethasone dosage, with high incidence (50.55%) at high concentration (50?mg/kg) compared with the low doses (6?mg/kg, 38.10%). Transmission electron microscopy revealed significant cellular changes of the cleft palate shelf, including loose cell connection, cellular swelling, as well as reduced extracellular matrix and mitochondria. Following exposure to dexamethasone, the apoptotic rate in the palate increased with elevated dosage. Western blotting analysis indicated that the expression levels of GATA-6 and BMP-2 were reduced, while the levels of apoptotic proteins bax and caspase-3 were increased. The results of authors’ study suggested that dexamethasone-induced cleft palate formation involved apoptosis occurred in a dose-dependent manner. BMP-2 and GATA-6 mediated dexamethasone-induced cleft palate formation. © 2016 by Mutaz B. Habal, MD.


Wei L.,Jilin Normal University | Hanning C.,CAS Shenyang Institute of Automation
International Journal of Advancements in Computing Technology | Year: 2012

The Artificial Bee Colony (ABC) algorithm recently gained high popularity by providing a robust and efficient approach for solving continuous optimization problems. In order to apply ABC in discrete landscape, a binary version of artificial bee colony (BABC) algorithm is proposed in this manuscript. Unlike the original ABC algorithm, the proposed BABC represents a food source as a discrete binary variable and applies discrete operators to change the foraging trajectories of the employed bees, onlookers and scouts in the probability that a coordinate will take on a zero or one value. With four mathematical benchmark functions, BABC is proved to have significantly better performance than the other two successful discrete optimizer, namely the genetic algorithm (GA) and particle swarm optimization (PSO).


Zhao L.,Jilin Normal University | Wang J.,Jilin Normal University
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2012

Hollow CaCO 3 microspheres were successfully synthesized using sodium carbonate and calcium chloride through a precipitation reaction method at room temperature. Polyvinylpyrrolidone (PVP), together with sodium dodecyl sulfonate (SDS), was employed as template for the controlled growth of hollow CaCO 3 microspheres. The concentration of SDS was an important factor to control the synthesis of hollow CaCO 3 microspheres. It suggested that the PVP-SDS complex micelles played a key role in controlling the growth of biominerals X-ray diffraction (XRD), FESEM and TEM confirmed that hollow CaCO 3 microspheres consisting of calcite crystals were synthesized In the present work, we also proposed a hypothetical mechanism for the formation process of hollow CaCO 3 microspheres. © 2011 Elsevier B.V.

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