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Anhui, China

Huaibei Normal University is a university in Huaibei, China. Wikipedia.

Zhang Y.-X.,Huaibei Normal University | Jia Y.,Anhui University
Applied Surface Science | Year: 2014

Akaganéite (β-FeOOH) nanorods with a hollandite-type structure were prepared by a simple solution method, and were characterized by X-ray diffraction, Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy and nitrogen adsorption-desorption isotherms. The ion-exchange properties of the nanorods toward As(V) ions were investigated. The ion-exchange mechanism between the surface hydroxyl groups and As(V) ions was revealed by FTIR and XPS. From the results of the experiments, it is found that the surface hydroxyl groups which hydrogen bonded water molecules located outside of the hollandite channels play key roles in the ion-exchange process. In addition, the as-prepared β-FeOOH could be readily regenerated using NaOH solution and be repeatedly used. © 2013 Elsevier B.V. Source

Yuan W.-J.,Huaibei Normal University | Xia C.-Y.,Tianjin University of Technology
PLoS ONE | Year: 2014

Public cooperation plays a significant role in the survival and maintenance of biological species, to elucidate its origin thus becomes an interesting question from various disciplines. Through long-term development, the public goods game has proven to be a useful tool, where cooperator making contribution can beat again the free-rides. Differentiating from the traditional homogeneous investment, individual trend of making contribution is more likely affected by the investment level of his neighborhood. Based on this fact, we here investigate the impact of heterogeneous investment on public cooperation, where the investment sum is mapped to the proportion of cooperators determined by parameter α. Interestingly, we find, irrespective of interaction networks, that the increment of α (increment of heterogeneous investment) is beneficial for promoting cooperation and even guarantees the complete cooperation dominance under weak replication factor. While this promotion effect can be attributed to the formation of more robust cooperator clusters and shortening END period. Moreover, we find that this simple mechanism can change the potential interaction network, which results in the change of phase diagrams. We hope that our work may shed light on the understanding of the cooperative behavior in other social dilemmas. © 2014 Yuan, Xia. Source

Yang Y.-G.,Huaibei Normal University
Research in Astronomy and Astrophysics | Year: 2011

We present charge-coupled device (CCD) photometry for the short-period K-type binary EI CVn, observed on 2009 February 28 at the Xinglong Station of National Astronomical Observatories, Chinese Academy of Sciences. By using the Wilson-Devinney program, the photometric solution was first deduced from our VR observations. The results show that EI CVn is a W-type weak-contact binary with a mass ratio of qph = 0.2834(±0.0010) and an overcontact degree of f = 20.0%(±0.7%). The distorted light curves were modeled by a dark spot on the cool primary component, whose area was up to 1.9% of the area of the primary. Based on the period analysis, it is found that there exists a weak secular decrease at a rate of dP/dt = - 3.11(±0.03) × 10 -7d yr-1, which may be attributed to mass transfer from the primary to the secondary. With mass transfer occurring, the separation between both components will shrink, which may cause the degree of overcontact to increase. Therefore, the weak-contact binary EI CVn may evolve into a deep-contact configuration. Source

Li H.,Huaibei Normal University | Xie X.,Huaibei Normal University | Wang L.,Huaibei Normal University | Wang L.,CAS Shanghai Institute of Organic Chemistry
Chemical Communications | Year: 2014

A highly selective alkenylation of azoxybenzenes catalyzed by the Ru III-complex was developed. It provides a direct access to a series of olefinated azoxy compounds in good yields. © the Partner Organisations 2014. Source

Tan H.,Huaibei Normal University | Li H.,Huaibei Normal University | Ji W.,Huaibei Normal University | Wang L.,Huaibei Normal University | Wang L.,CAS Shanghai Institute of Organic Chemistry
Angewandte Chemie - International Edition | Year: 2015

A novel and practical decarboxylative alkynylation of α-keto acids with bromoacetylenes is catalyzed by hypervalent iodine(III) reagents when irradiation by sunlight at room temperature. The product ynones are generated in good yields. Experiments show that results obtained with blue light (λ=450-455 nm) are comparable to those obtained when using sunlight. Mechanistic studies demonstrate that the sunlight-driven decarboxylation undergoes a radical process. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. Source

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