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Yantai, China

Wang Y.,Yan Tai University | Zhang W.,Yan Tai University
Zeitschrift fur Naturforschung - Section A Journal of Physical Sciences | Year: 2010

The resistance distance between two vertices of a connected graph G is computed as the effective resistance between them in the corresponding network constructed from G by replacing each edge with a unit resistor. The Kirchhoff index of G is the sum of resistance distances between all pairs of vertices. In this paper, following the method of Y. J. Yang and H. P. Zhang in the proof of the Kirchhoff index of the linear hexagonal chain, we obtain the Kirchhoff index of cyclopolyacenes, denoted by HRn, in terms of its Laplacian spectrum. We show that the Kirchhoff index of HRn is approximately one third of its Wiener index. © 2010 Verlag der Zeitschrift für Naturforschung, Tübingen.


Wang Y.,Yan Tai University | Zhang W.,Yan Tai University
International Journal of Quantum Chemistry | Year: 2010

The resistance distance rij between two vertices vi and vj of a connected graph G is computed as the effective resistance between nodes i and j in the corresponding network constructed from G by replacing each edge of G with a unit resistor. The Kirchhoff index Kf(G) is the sum of resistance distances between all pairs of vertices. In this article, following the method of Yang and Zhang in the proof of the Kirchhoff index of liner hexagonal chain, we obtain the closed-form formulae of the Kirchhoff index of liner pentagonal chain Pn in terms of its Laplacian spectrum. Finally, we show that the Kirchhoff index of Pn is approximately one half of its Wiener index. © 2009 Wiley Periodicals, Inc.


Chen B.-Y.,National Ilan University | Ma C.-M.,St. Marys College | Han K.,Yan Tai University | Yueh P.-L.,National Ilan University | And 2 more authors.
Bioresource Technology | Year: 2016

As known, decolorized metabolites (DMs) were capable to act as electron shuttles (ESs) to enhance color removal of textile dye(s); however, optimal manipulation of such advantages to microbial fuel cell (MFC)-assisted dye decolorization for industrial practicability were still remained open to be disclosed. The novelty of this work was to disclose such DMs-supplementing strategies for the most promising reductive decolorization in MFC-assisted bioremediation. Quantitative assessment clearly indicated that MFCs coupled to DMs accumulation was economically-feasible strategy of bioaugmentation and biostimulation. That is, MFC technology can be applied to select appropriate on-site dye decontamination in the presence of naturally-generating DMs. © 2015 Elsevier Ltd.


Gao K.,Yan Tai University | Lin K.-L.,National Ilan University | Wang D.,Yan Tai University | Hwang C.-L.,National Taiwan University of Science and Technology | And 3 more authors.
Construction and Building Materials | Year: 2014

An alkali-activating solution plays an important role in dissolving Si and Al atoms to form geopolymer precursors and aluminosilicate material. This study explores the effects of the SiO2/Na2O molar ratio (1.0-2.0) on the properties of nano-SiO2 metakaolin-based geopolymers. The setting time, compressive strength, mercury intrusion porosimetry (MIP), Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM) are investigated to study the properties of the geopolymers. The results show that the compressive strength increased, and that the products of geopolymerization filled pores with curing time, causing the microstructure to become dense. Moreover, a nano-SiO2 metakaolin-based geopolymer sample with a SiO2/Na2O ratio of 1.5 exhibited more strength, higher density, and less porosity. Applying the nano-SiO2 to a geopolymer enhances compactness, improves uniformity, and increases strength. © 2013 Elsevier Ltd. All rights reserved.


Han K.,Yan Tai University | Yueh P.-L.,National Ilan University | Qin L.-J.,Yan Tai University | Hsueh C.-C.,National Ilan University | Chen B.-Y.,National Ilan University
Bioresource Technology | Year: 2015

This study provided a novel evaluation scheme to quantitatively reveal "synergistic" stimulation of microbial fuel cell (MFC)-assisted dye decolorization for industrial practicability. This work also disclosed why dye decolorization was more electrochemically favorable during simultaneous bioelectricity generation and dye decolorization (SBG&DD). Quantitative assessment upon stimulating effects of different decolorized metabolites on BG and DD alone was also implemented for conclusive remarks. Apparently, using MFC as the method of dye decontamination could considerably increase ca. 40-70% of electron transfer capabilities for SBG&DD, thereby significantly improving the performance of dye decontamination. © 2015 Elsevier Ltd. All rights reserved.

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