Anshun College

Anshun, China

Anshun College

Anshun, China
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Pang L.,Chinese Academy of Forestry | Pang L.,Anshun College | Zhou Z.-C.,Chinese Academy of Forestry | Zhang Y.,Chinese Academy of Forestry | And 2 more authors.
Forest Research | Year: 2017

Objective: The purpose of this study is to reveal the correlation between stoichiometric characteristics of N, P and the growth traits of Pinus massoniana on P deficiency site. Method: Taking 11-year-old P. massoniana clones in second-generation breeding population as test materials, the major growth traits, including height, DBH, and its correlation with N, P stoichiometric characteristics of needles, were studied through field investigation. Result: (1) Significant differences were observed in traits among clones, and high clonal repeatability was detected. There were significant differences among clones in N, P content and N/P of mature and current year needle; (2) The major growth traits of clones had positive correlations with N content and N/P of mature and current year needle; (3) Based on major growth traits and N, P stoichiometric characteristics of needles, the 30 clones tested were clustered into 4 groups. Group 1 exhibited superior growth traits, with higher N/P of mature needle, but relatively lower N/P of current year needle. Group 2 exhibited good growth traits, with medium N/P of mature and current year needle. Group 3 had the ordinary growth traits, but this group accounted for half of the tested clones. The N/P of mature needle had larger difference with current year needle. Group 4 exhibited poor growth traits, while N/P of mature and current year needle were lower. Conclusion: Two clones belonging to group 1 exhibited perfect growth traits, which might by adjusting N, P content and N/P of mature and current year needle to form a particular nutrient allocation mechanism. © 2017, Chinese Academy of Forestry. All right reserved.


Liu H.,Anshun College | Song Y.,Anshun College | Zhang X.,Anshun College
Chemical Engineering Transactions | Year: 2017

Rutin was taken as reference substance, and the conditions of aluminum chloride colorimetric assay for determining total flavonoids in leek extract were optimized. The effects of several parameters, such as dosage of color developing agent, buffer dosage, pH and reaction temperature and time, on the color development reaction of total flavonoids were evaluated. The optimum conditions were as follows: 1 mL appropriate concentrationor of leek extract, added 1 mL of HAc-NaAc buffer (pH4.8), 2mL of 0.1mol·L-1AlCl3 solution, volume calibration with 70% ethanol to 10 mL and mixing, and 12 min of water bath at 40°C. Under the optimum conditions, the maximum absorption wavelengths of standard rutin solution and leek extract coincided (407nm), with the absorbances reaching maxima also. The method has high stability, reproducibility and recovery. Compared with the commonly used NaNO2-Al (NO3)3-NaOH colorimetric method, it is considered that the method of determination of total flavonoids in leek by AlCl3 colorimetric assay is more suitable when rutin was taken as reference substance Copyright © 2017, AIDIC Servizi S.r.l.


Meng B.,Hunan University | Meng B.,Anshun College | Wang L.-L.,Hunan University | Huang W.-Q.,Hunan University | And 3 more authors.
Applied Optics | Year: 2012

We present a procedure to generate slow light with a large group index, wideband, and low dispersion in our suggested photonic crystal waveguide. By modulation of the declinations in the first two rows of air holes, the group index, the bandwidth, and the dispersion can be tuned effectively. Utilizing the two-dimensional plane wave expansion method (PWE) and the finite-difference time-domain method (FDTD), we demonstrate slow light with the group indices of 23, 35, and 45, respectively, while restricting the group-index variation within a 10% range.We accordingly attain an available bandwidth of 40.7, 23.7, and 5.1 nm, respectively. Meanwhile, the normalized delay-bandwidth product stays around 0.45, with minimal dispersion less than 0.2 (ps2 /m) for all the cases. © 2012 Optical Society of America.


Zhang S.-J.,Anshun College | Xu C.-H.,Tsinghua University | Chen J.-B.,Tsinghua University | Zhou Q.,Tsinghua University | Sun S.-Q.,Tsinghua University
Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis | Year: 2011

Fourier transform infrared (FTIR) spectroscopy and second derivative IR spectroscopy were applied to analyze and evaluate different parts of Scorpio. The second derivative IR spectra show clear differences while the origin spectra are quite similar. It was found that proteins are the dominant components in each part and the tail has distinct proteins compared to the others; fats are mainly stored in the trunk; sulfates are ubiquitous in all parts. Interestingly, the back part of the trunk of degenerative Scorpio contains some purine. It was demonstrated that FTIR spectroscopy integrated with second derivative IR spectroscopy not only can offer a fast, comprehensive and objective methodology for analyzing and evaluating the micro-differences among the various parts of same medicinal materials, but also can provide a rational guidance for medicinal and pharmacological studies.


Zhang X.,Anshun College | Zhang S.,Anhui University | Liu H.,Anshun College
Chemistry Bulletin / Huaxue Tongbao | Year: 2012

In the presence of the CTAB soft template, AgBr/CeO2 nanocomposites were prepared by coprecipitation method. The products were characterized by TEM, XRD, XPS and UV-Vis spectra. The photocatalytic activity of the AgBr/CeO2 nanocomposites was studied by the photo-degradation of methyl orange. In addition, the effect factors, such as reaction time, solution acidity, amounts of H2O2 and the catalyst as well as repeat use of the catalyst, were discussed in detail.


Zhang Y.,Southwest University | Zhang Y.,Anshun College | Chen X.,Southwest University | Yang Y.,Southwest University | And 3 more authors.
Journal of Environmental Sciences | Year: 2011

Dissolved organic matter (DOM) plays an important role in the process of mercury release from water body. In this study, the influence of DOM from different sources (DOM R, DOM S and DOM H, extracted from rice straw, compost and humic soil respectively) on mercury reduction was investigated. The molecular weight distribution and chemical composition of DOM from each source were determined using ultrafiltration membrane technique and elemental analysis respectively. The result showed that mercury release from DOM-added samples was much lower than the control; the lowest mercury release flux was observed in the treatment of DOM H, 25.02% of the control, followed by DOM S and DOM R, 62.46% and 64.95% of the control, respectively. The higher saturation degree and lower molecular weight of DOM H was responsible for the highest inhibition degree on the mercury release. The link between DOM H, concentration and mercury flux was also estimated and the result showed that mercury flux was increased with DOM H at lower concentration, while decreased with DOM H at higher concentration. Different mechanism dominated the influence of DOM on mercury release with variation of DOM concentration. © 2011 The Research Centre for Eco-Environmental Sciences, Chinese Academy of Sciences.


Qian S.-Q.,Anshun College | Wu H.-H.,Anshun College
2013 IEEE Conference Anthology, ANTHOLOGY 2013 | Year: 2014

In this paper, a dynamic immune optimization algorithm with constraints (DCIOA), based on adaptive memory and dynamic recognition functions of artificial systems, was proposed to deal with Knapsack problem with constraints in dynamic environments. A novel dynamic stochastic ranking strategies is used to select excellence antibodies, meanwhile, infeasible antibodies participate in evolution of population; Improving the searching functions utilizes repairing method to remedy infeasible antibodies, and make sure the rate of feasible antibody in current environmental population; Environmental memory pools are constructed to store memory cells, at the same time, environmental recognition operator is designed to examine the environments changing over time, the initial population of similar or same environments are generated via introducing some memory cells into the current population, which accelerates the DCIOA's convergence. In numerical experiments, four well-known dynamic evolutionary algorithms are selected to compare with the DCIOA by three groups of dynamic high dimensional knapsack problems. The results indicate that the DCIOA shows a promising convergence capability, meanwhile, we will also show that our algorithm improves its response over time, a kind of secondary response present in the immune system, and can track more rapidly the optimum in similar environments and requires less time than the other algorithms proposed in literature. © 2013 IEEE.


Li Z.,South-Central University for Nationalities | Li Y.,East China Normal University | Li Y.,Anshun College | Li J.,South-Central University for Nationalities
Journal of Chemical Physics | Year: 2012

We perform density functional studies of the support effects on the gold-catalyzed dissociation of H2 using the model clusters (Au 10 and Au13) on ZnO(101) surface and find that H 2 prefers to adsorb on the bottom layer of Au clusters on the ZnO surface. The interaction energies of H2 are exponentially correlated with the H-H and H-Au bond parameters. The dissociation of H2 easily occurs on the bottom layer with the energy barriers no more than 0.44 eV. The support effects on the dissociation barriers are greatly dependent on the H-H bond distance in the transition state (TS), i.e., the early TSs with small barriers have larger support effects than the late TSs with large barriers. We find that the charge transfer from the gold clusters to the oxide support creates the localized charging states of the interface gold with the high feasibility for H2 activation and dissociation. © 2012 American Institute of Physics.


Meng B.,Hunan University | Meng B.,Anshun College | Wang L.-L.,Hunan University | Li X.-F.,Hunan University | And 4 more authors.
Optics Communications | Year: 2012

To tailor the bandwidth and the group-velocity dispersion, we demonstrate a novel waveguide based on a photonic crystal within a triangular array with crescent-like-shaped air holes. By changing the angle between the waveguide axis and symmetric axis of the air hole from 0 to π/2, we find that the available bandwidth with a nearly constant group index in excess of 22 increases from 7 nm to 13 nm, that the corresponding normalized delay-bandwidth product increases from 0.202 to 0.245, and that the absolute value of the group-velocity dispersion decreases from 13.500 ps 2/km to 10 ps 2/km. The origin of all the findings is related to the widening of the slow-light region with the increasing of the angle. © 2012 Elsevier B.V. All rights reserved.


PubMed | Anshun College
Type: Journal Article | Journal: Guang pu xue yu guang pu fen xi = Guang pu | Year: 2012

Fourier transform infrared (FTIR) spectroscopy and second derivative IR spectroscopy were applied to analyze and evaluate different parts of Scorpio. The second derivative IR spectra show clear differences while the origin spectra are quite similar. It was found that proteins are the dominant components in each part and the tail has distinct proteins compared to the others; fats are mainly stored in the trunk; sulfates are ubiquitous in all parts. Interestingly, the back part of the trunk of degenerative Scorpio contains some purine. It was demonstrated that FTIR spectroscopy integrated with second derivative IR spectroscopy not only can offer a fast, comprehensive and objective methodology for analyzing and evaluating the micro-differences among the various parts of same medicinal materials, but also can provide a rational guidance for medicinal and pharmacological studies.

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