Anshan Normal College

Anshan, China

Anshan Normal College

Anshan, China

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Guo H.,CAS Kunming Institute of Botany | Guo H.,Anshan Normal College | Guo H.,University of Chinese Academy of Sciences | Si J.,Beijing Forestry University | And 5 more authors.
Journal of Asian Natural Products Research | Year: 2013

Two new triterpenoids, 3β-(2-methoxy-oxalyloxy)-24-methylene-lanost-8- en-21-oic acid (1) and 3β-(2-methoxy-oxalyloxy)-15-hydroxy-24-methylene- lanost-8-en-21-oic acid (2), were isolated from cultures of the fungus Perenniporia maackiae, together with two previously known triterpenoids (3 and 4). Their structures were determined by spectroscopic methods, including 1D and 2D NMR, and MS analyses. All compounds were evaluated for their cytotoxic activities on five tumor cell lines. © 2013 Copyright Taylor and Francis Group, LLC.

Liu H.J.,University Of Science And Technology Liaoning | Wang H.Y.,Anshan Normal College
Advanced Materials Research | Year: 2013

For the dispersion problem of the widespread sensors in the R & D process of measuring instruments, this paper proposes a practical method for the automatic calibration of linearity error. Meanwhile, it takes the pressure sensor as an example to describe different calibration methods such as using the hardware, the combination of software and hardware, using the software. © (2013) Trans Tech Publications, Switzerland.

Li M.,Anshan Normal College | Zhang Y.,Anshan Normal College | Li L.,Northeastern University China
Functional Materials Letters | Year: 2010

The structural and electronic properties of the calcium ferrite-type LiMn2 O 4 were studied using the full-potential linearized augmented plane wavemethod. The results showed that LiMn 2 O 4 was an antiferromagnetic semiconductor from GGA+U calculations, similar to the experimental report of Li 0.92Mn2 O 4. The spin magnetic moments and density of states of Mn atoms showed that LiMn2 O 4 was a mixed-valence compound with Mn3+ and Mn 4+ cations randomly distributed amongst the octahedral sites. © 2010 World Scientific Publishing Company.

Li M.,Anshan Normal College | Zhang P.,Anshan Normal College | Wei X.,Tongji University
Journal of Physics and Chemistry of Solids | Year: 2016

The structural stability and physical properties of CrNCN were studied using density functional theory with explicit electronic correlation (GGA+U). Calculated results indicate that the title compound, similar to MNCN (M=Mn, Fe, Co, Ni), is thermodynamically stable but mechanically unstable. Analysis of electronic and magnetic structures reveals that CrNCN is an antiferromagnetic semiconductor. However, the exact magnetic structure of CrNCN consists of an antiferromagnetic intralayer and a ferromagnetic interlayer, which differs from that of the type-II antiferromagnetic semiconductor MNCN (M=Mn, Fe, Co, Ni), which consists of a ferromagnetic intralayer and an antiferromagnetic interlayer. © 2016 Elsevier Ltd

Wang Y.,Tongji University | Wang Y.,Northeast Petroleum University | Zheng Y.,CAS Shenyang Institute of Metal Research | Wang J.,CAS Shenyang Institute of Metal Research | And 2 more authors.
Jinshu Xuebao/Acta Metallurgica Sinica | Year: 2015

Amorphous alloy is a new type of material that exhibits exceptional properties or combinations of properties that are often not achievable in conventional crystalline materials. Fe-based amorphous alloys has attracted significant attention over the last few decades because of their low cost and enhanced mechanical performance. However, they are more suitable for the industrial application of coatings due to the fatal disadvantages of poor toughness. High velocity oxygen-fuel (HVOF) spraying is a good way to make amorphous alloy coatings (AMCs), for the individual droplets are cooled at a rate of around 107 K/s which is much higher than the critical cooling rate of the amorphous alloys during the thermal spraying. Fe-based AMCs obtained by using the HVOF spray method are important materials for industrial applications because of high glass-forming ability and exceptional performances, such as excellent corrosion resistance, high hardness, and superior wear resistance. In this work, FeCrMoMnWBCSi AMCs were prepared by HVOF thermal spray. The microstructure and amorphous characteristics of AMCs were characterized by SEM and XRD. Electrochemical corrosion behavior of AMCs was investigated in different concentration of NaCl and H2SO4 solutions compared with that of 304 stainless steel and ND steel. The surface film of materials after immersed in two solutions was analysed by XPS. The results indicated that HVOF thermal spraying Fe-based AMCs presented dense layered structure, high amorphous phase content and low porosity. The composite structure of AMCs was formed with some nanocrystallite phases embedded in the amorphous matrix. AMCs exhibited better resistance to pitting corrosion and relatively low uniform corrosion resistance due to the porosity, while the pitting potential of 304 stainless steel was sensitive to NaCl concentration. XPS results revealed that the presence of Cr, Mo and W oxides in the passive film of AMCs may result in the better corrosion resistance. The enrichment of Mo4+ oxides on the surface favored the formation of a more stable and protective layer which could be assumed to be responsible for the observed high stability of passive film. The diminishing or avording pores may be beneficial to further improve the pitting corrosion resistance of AMCs in NaCl solution. In all cases, AMCs showed better resistance to H2SO4 solutions corrosion due to the high stability of passive film. 304 stainless steel and ND steel presented stable passivation behavior only in high concentration of H2SO4 solution. In the lower concentration solution of H2SO4, the amorphous structure of the thinner coatings could facilitate the formation of thicker passivation film and lead to the higher corrosion resistance. The corrosion resistance of AMCs in H2SO4 solution could be enhanced significantly by formation of high amorphous phase. © Copyright.

Lu Y.,Dalian Jiaotong University | Li M.,Anshan Normal College | Rahman A.,Tongji University | Shen J.,Tongji University | And 3 more authors.
Scripta Materialia | Year: 2014

The relationship between particle diffusion and free volume of colloidal glass was studied in real space by laser scanning confocal microscopy. By quantifying the particle diffusion distance and the free volume size, we found a strong spatial correlation between these two quantities. Large free-volume regions were observed to possess low elastic modulus and thus results in a low energy cost of diffusion-induced strain, indicating that a large free-volume region presents a low energy barrier to structural rearrangement, thereby benefiting particle diffusion. © 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

Guo H.,CAS Kunming Institute of Botany | Guo H.,Anshan Normal College | Guo H.,University of Chinese Academy of Sciences | Feng T.,CAS Kunming Institute of Botany | And 2 more authors.
Journal of Asian Natural Products Research | Year: 2012

Four new compounds, craterellin D (1), 5-hydroxymethyl-2-hydroxy-4-methoxy- phenylethanone (2), 5-carboxyl-2-[2-(1,2-dihydroxyisopropyl)]-benzofuran (3), and 6-hydroxy-3-methoxy-4-methyl-2-cyclohexen-1-one (4), were isolated from cultures of the basidiomycete Craterellus odoratus, together with three known compounds craterellins A-C (5-7). Structures of 1-4 were elucidated on the basis of extensive spectroscopic analysis. Selected compounds were evaluated for their inhibitory activities against one isozyme of 11-hydroxysteroid dehydrogenase (11-HSD1) and cytotoxic activities on five tumor cell lines. Compound 2 was found to exhibit inhibitory activity against human 11-HSD1 with an IC50 value of 16.4g/ml. © 2012 Copyright Taylor and Francis Group, LLC.

Teng Z.,Jilin University | Han Y.,Anshan Normal College | Li J.,Jilin University | Yan F.,Jilin University | Yang W.,Jilin University
Microporous and Mesoporous Materials | Year: 2010

Hollow mesoporous silica spheres were synthesized by a sol-gel/emulsion (oil-in-water/ethanol) approach, in which cetyltrimethylammonium bromide (CTAB) surfactant was employed to stabilize and direct the hydrolysis of oil droplets of tetraethoxysilane (TEOS). The diameters of the hollow spheres can be tuned in the range from 210 to 720 nm by varying the ratio of ethanol-to-water and their shell thickness can be mediated by changing the concentration of CTAB used in the system. BET surface areas of the hollow silica spheres are determined to be in the range of 924-1766 m2 g-1 and their pore sizes are around 3.10 nm as determined by BJH method. © 2009 Elsevier Inc. All rights reserved.

Lou Y.,Anshan Normal College | Pu T.,Anshan Normal College | Geng X.,Anshan Normal College
Proceedings of the 2012 International Conference on Industrial Control and Electronics Engineering, ICICEE 2012 | Year: 2012

According to the present management and construction of city pipe net, this paper analyzed spatial functions of underground city pipe net in Anshan City, and proposed detailed design and steps. The work in this paper is effective to the burst analysis and fracture. The practical application shows its value in the management of the city pipe net. © 2012 IEEE.

Wang X.,Shenyang University | Qu Y.-H.,Anshan Iron and Steel Group Corporation | Wang Y.-L.,Anshan Iron and Steel Group Corporation | Wang C.-Y.,Anshan Normal College | And 2 more authors.
Yejin Fenxi/Metallurgical Analysis | Year: 2013

The determination of metallic iron and ferrous oxide in furnace slag was studied. The leaching effect of five weak acid salt solutions (which could react with metallic iron but not react with ferrous oxide, including lead acetate, copper acetate, ferric chloride-sodium acetate-acetic acid, iodine-potassium iodide and ferric trichloride) and non-aqueous solution (iodine-ethanol solution) on metallic iron were investigated. The iodine-ethanol solution was selected as the leaching agent for metallic iron in furnace slag. 0.200 0 g of furnace slag sample was leached with 50 mL of iodine-ethanol solution for 40 min, then the content of iron in leaching solution and ferrous in residue was determined by potassium dichromate titration, respectively, to obtain the content of metallic iron and ferrous oxide in furnace slag. The experimental method showed that, leaching rate of metallic iron was higher than 97%, while ferrous oxide was not leached. Compared with the classical ferric chloride leaching reagent, iodine-ethanol system showed better leaching effect of metallic iron. The metallic iron could be totally separated from ferrous oxide and avoided the acid dissolution interference while using ferric trichloride as leaching agent. The steel slag and dephosphorization slag were leached with iodine-ethanol solution and then determined by potassium dichromate titration. The relative standard deviation (RSD) of metallic iron was 4.2% and 4.6%, respectively. The RSD of ferrous oxide was 0.72% and 0.62%, respectively.

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