Guo X.,Ankang University
Agro Food Industry Hi-Tech | Year: 2017
After a lot of reading free combat and taekwondo-related literature, through comparative analysis of the origin and development of free combat and Taekwondo, expert interviews and survey questionnaire were used to discuss the free combat and Taekwondo in the promotion of communication, technical characteristics, cultural differences in several aspects of the problem, for the advantages and disadvantages of the two, free combat corresponding development strategies were proposed. Research indicates: Free combat exists the phenomenon of not high prevalence, there is still some deviation of its cognitive rate, cultural connotation has not fully reflect the competitive style, it is necessary to distinctive national characteristics as the basis, through the free combat to develop China free combat market.
Yang Y.,Ankang University
Chemical Engineering Transactions | Year: 2017
In the present study, the ferrimagnetic transition of doped cobaltite Nd1-xSrxCoO3 (0.1≤x≤0.5) was investigated in detail. The samples were successfully synthesized through solid state reaction method while the mixtures were ground and sintered. X-ray diffraction power patterns showed that all the samples were crystallized in the single perovskite structure with orthorhombic. Dc magnetization and ac susceptibility of samples were performed from 300 K to 5 K in the magnetic field. The results of dc magnetization measures suggest that Nd1-xSrxCoO3 is ferrimagnetic phase below 60 K. The lower doping samples are well shown by a fit to the critical slowing down of the spin class. Moreover, the study shows that magnetic interaction appears between Co spins and Nd spins. Therefore, the investigation suggests that the Nd and Co anti-parallel, Nd1-xSrxCoO3 ferrimagnetic transition exists at low temperature. Furthermore, in the paper we summarized the phase diagram obtains from the magnetic studies which presented the system is divided into ferromagnetic and spinglass-like regions. Copyright © 2017, AIDIC Servizi S.r.l.
Huang J.,Northwest Agriculture and Forestry University |
Huang J.,Ankang University |
Xu H.,Northwest Agriculture and Forestry University
Current Topics in Medicinal Chemistry | Year: 2016
Matrine is a quinolizidine alkaloid isolated from the roots of Sophora flavescens (Kushen), Sophora tonkinensis, and Sophora alopecuroides (Kudouzi). Matrine and its derivatives have displayed a broad scope of biological properties such as anticancer activity, anti-inflammatory activity, antiviral activity, analgesic effect, anti-fibrotic activity, insecticidal activity, antimicrobial activity, etc. The present review has summarized the biological activities and structural modifications of matrine and its derivatives focused on their N-1 position and lactam ring from 2010 to 2015. In addition, the mechanism of action and structure-activity relationships of matrine and its derivatives are discussed. © 2016 Bentham Science Publishers.
Li Y.,Ankang University
Microchimica Acta | Year: 2012
We report on a new scheme for the determination of the activity of caspase-3 using a specific peptide labeled with N-(4-aminobutyl)-N-ethylisoluminol (ABEI) as a chemiluminescent (CL) probe and on the development of magnetic separation technology. Firstly, the ABEI-labeled and biotinylated peptide was prepared and conjugated to streptavidin-coated magnetic beads (MBs) to form f-MBs (functionalized magnetic beads). The f-MBs contain a site (DEVD, Asp-Glu-Val-Asp) that is cleaved by caspase-3. Upon cleavage, the terminal residue attached to ABEI can dissociate from the f-MBs and can be used for CL detection. CL intensity is linearly related to the concentration of caspase-3 in the range 1. 0 to 600 ng mL -1, with a detection limit of 0. 3 ng mL -1. The relative standard deviation of the assay is 3. 6 % at a level of 50 ng mL -1 of caspase-3 (for n = 11). The CL assay has been applied to the determination of caspase-3 in Jurkat cell extract with recoveries between 96. 6 % and 106. 1 % (n = 5). © 2012 Springer-Verlag.
Wen Y.-N.,Ankang University
Central European Journal of Physics | Year: 2014
The surface relaxation and the formation of a single vacancy in very thin Cu (001) film formed by 2 ~ 14 atomic layers have been studied by using MAEAM and MD simulation. For the surface relaxtion, the highest surface energy is in the l = 2 atomic layers. The multilayer relaxation mainly occurs between the first two atomic layers, and the maximum contractive displacement is obtained in the very thin Cu (001) film formed by l = 3 atomic layers. For the vacancy formed in l′ = 1 of the very thin Cu (001) film formed by l = 2 ~ 14 layers, the most difficult site in the film formed by l = 3 atomic layers. © 2014 Versita Warsaw and Springer-Verlag Wien.
Luo W.-Q.,Ankang University |
Chen J.-C.,Ankang University
Construction and Building Materials | Year: 2011
This paper presents a laboratory study of modified bitumen containing ethylene vinyl acetate (EVA) and ethylene vinyl acetate grafted maleic anhydride (EVA-g-MAH) copolymers. When the different polymers were added, the physical properties of modified bitumens, such as softening point, ductility at low temperature and storage stability at high temperature are changed. The polymer modified bitumens (PMBs) were analyzed by thermogravimetry (TG), derivative thermogravimetry (DTG) and fourier transform infrared spectroscopy (FTIR). Thermal characterizations showed that the main decomposition stage refers to samples with modifiers exhibited a slight increase in thermal stability and the sample with the highest stability was EVA-g-MAH PMBs. FTIR analysis suggested that it is difficult to prove the EVA-g-MAH has reacted with the functional group in bitumen by FTIR spectrum. The dynamic shear rheometer (DSR) tests reported that added content of EVA-g-MAH has great effect on the rheological properties of the binder and its high temperature performance was improved while its temperature susceptibility was reduced in compare to EVA modified bitumens binder. © 2010 Elsevier Ltd. All rights reserved.
Zhu Y.,Ankang University
Advanced Materials Research | Year: 2013
This paper analyzed efficiency performance of two most popular charge pumps: Linear Dickson charge pump and the Exponential Dickson charge pump. The analysis result indicated that in a certain range, exponential charge pump had a much higher efficiency than the linear one. With this analysis result, a novel exponential charge pump was proposed. The simulation result shows the proposed charge pump has a 18.4% improvement in efficiency. © (2013) Trans Tech Publications, Switzerland.
Liang J.Y.,Ankang University
Applied Mechanics and Materials | Year: 2014
Edge detection is an old and hot topic in image processing, pattern recognition and computer vision. Numerous edge detection approaches have been proposed to gray images. It is difficult to extend these approaches to color image edge detection. A novel edge detection method based on mathematical morphology for color images is proposed in this paper. The proposed approach firstly compute vector gradient based on morphological gradient operators, and then compute the optimal gradient according to structure elements with different size. Finally, we use a threshold to binary the gradient images and then obtain the edge images. Experimental results show that the proposed approach has advantages of suppressing noise and preserving edge details and it is not sensitive to noise pixel. The finally edge images via the proposed method have high PSNR and NC compared with the traditional approaches. © (2014) Trans Tech Publications, Switzerland.
Li Y.,Ankang University
Analytical Sciences | Year: 2011
A novel mercury(II) ion (Hg2+) biosensor with electrogenerated chemiluminescence (ECL) detection using tris(2,2'-bipyridyl) ruthenium derivatives (ruthenium complex) as labeling was developed in the prescent work. One thymine (T)-rich single-strand DNA (ssDNA) labeled with a ruthenium complex was taken as an ECL probe. When the other T-rich capture ssDNA was self-assembled onto the surface of a gold electrode with a thiol group, and then hybridized with the ECL probe to form double-strand DNA (dsDNA) structures in the presence of Hg2+, a strong ECL response was electrochemically generated. The ECL intensity was linearly related to the concentration of Hg2+ in the range from 1.0 × 10-6 to 1× 10-9 M with a detection limit of 3.0 × 10-10 M. The relative standard deviation was 4.1% at 1.0 × 10-7 M Hg2+ (n = 5). This work demonstrates that the combination of the strongly binding T-rich DNA to Hg2+ with the highly sensitive ECL technique to design an ECL Hg2+ biosensor is a great promising approach for the determination of metal ions. © 2011 The Japan Society for Analytical Chemistry.
Han R.,Ankang University
Journal of Membrane Science | Year: 2013
Numerous efforts have been made to improve the thermal resistance and chlorine resistance of nanofiltration (NF) membranes. In this work, interfacial polymerization (IP) is selected for preparing TFC membranes because TFC membranes prepared with the IP method can provide high fluxes. Poly(melamine/trimesoyl chloride (TMC)) with all aromatic rings and triazine rings is used to fabricate the functional layer of the composite NF membrane and a reinforced polyetherimde (PEI) ultrafiltration (UF) membrane is used as the support layer. The effects of the reaction time and the effects of the monomer concentration on the membrane performance are studied in detail in this work. When the melamine concentration is 2.0%, reaction time is 40s and the curing temperature is 70°C, the optimized preparation conditions of the composite membrane are reached. The flux of the composite NF membrane is about 34L/m2h and its Na2SO4 rejection is about 77.8% when it is tested at 1.0MPa and 20°C. The surface morphologies of the composite membrane and substrate membrane are observed by scanning electron microscopy (SEM). The prepared composite membrane shows excellent thermal resistance and chlorine resistance compared with the poly(piperazine amide/TMC) amide NF membrane prepared at the same condition. The flux of poly(melamine/TMC) composite membrane increases from 32 to 138L/m2h while the rejection of Na2SO4 does not decrease when the operation temperature is elevated from 18°C to 95°C. The performance of poly(melamine/TMC) amide does not decline during 96h immersion in chlorine solution (NaClO, 200ppm). © 2012 Elsevier B.V.