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Li S.,Shandong Institute of Education | Du L.,University of Jinan | Guan Y.,University of Jinan
Proceedings - 2010 7th International Conference on Fuzzy Systems and Knowledge Discovery, FSKD 2010 | Year: 2010

In an ordered decision information system, dominance-based rough set approach (DRSA) were used to compute reducts of the system which preserve the lower and upper approximations of upward union and downward union of decision classes. Recently, class-based reducts (L-reduct and U-reduct) which preserve respectively lower and upper approximates of each decision classes was proposed. In this paper, we modify the definition of U-reduct and propose the concept of U*-reduct which is comprehensive and convenient for drawing decision rules. We give an equivalent description of L-reduct and U*-reduct, and compute the L-reduct and U*-reduct utilizing discernibility function defined by discernibility sets of objects. ©2010 IEEE.


Wang J.,Shandong University | Liu Y.,Laiwu Vocational and Technology College | Cai Y.,Shandong Institute of Education | Zhang F.,Shandong University | And 2 more authors.
Bioscience, Biotechnology and Biochemistry | Year: 2010

Swertia mussotii Franch has anti-hepatitis activity and contains a high level of iridoid monoterpenoids. The cytochrome P450 monooxygenase (CYP) geraniol 10- hydroxylase (G10H) is thought to play an important role in iridoid monoterpenoid and indole alkaloid biosynthesis. Here we report the isolation of a full-length cDNA clone of S. mussotii G10H (SmG10H). The predicted gene product was a 496 residue protein designated CYP76B10, the sequence of which was highly similar to that of the CYP76 family, particularly to Catharanthus roseus G10H (80.2% homology). SmG10H transcripts were much more abundant in the leaves than in either the root or the stem, and were derived from a single copy gene. SmG10H expression was upregulated by treatment with methyljasmonate (MeJA) over a period from 6 h to 36 h after treatment. Accumulation of swertiamarin increased after elicitation by MeJA. SmG10H was heterologously expressed in both Escherichia coli and Pichia pastoris (yeast), forming a 55.5-kDa protein. Based on analysis in vitro, SmG10H was found to have catalytic activity hydroxylating geraniol. In the SmG10H overexpression plants, the level of SmG10H transcript and the contents of 10-hydroxygeraniol and swertiamarin increased simultaneously.


Wang W.-J.,Shandong Institute of Education | Yuan H.-M.,Shandong Institute of Education | Xiao S.-Q.,Shandong University
Wuji Cailiao Xuebao/Journal of Inorganic Materials | Year: 2010

Influence of different annealing process on the giant magneto-impedance (GMI) effect in soft magnetic alloy films of (Fe88Zr7B5)0.96 Cu0.04, which were prepared by radio frequency (RF) sputtering, was studied. It is obtained that both natural and current annealing can reduce the longitudinal GMI ratio. And the longitudinal GMI ratio of the annealed films increases with the increase of annealing current, and reaches a maximum value of 17% at 800 mA, while the sensitivity increase to 7%(kA/m)-1 at such annealing current (800 mA). In addition, influence of the magnetic field annealing on GMI effect is discussed. It is found that both the longitudinal and transverse GMI ratios of the films after magnetic field annealed increase at different temperatures. There exists a critical temperature (250°C), at which the longitudinal GMI ration presents a single-peak with a value of 17.5%, while the transverse one presents a double-peak with a value of 17.8% at ± 0.4kA/m.


Liu G.,Shandong University | Liu G.,Shandong Institute of Education | Liu S.,Shandong University | Dong X.,Shandong University | And 3 more authors.
Journal of Colloid and Interface Science | Year: 2010

Hollow colloidosomes consisting of plate-like Mg/Al layered double hydroxide (LDH) nanoparticles have been prepared by a facile route from a Pickering emulsion. The particles are first adsorbed onto the surface of paraffin oil-in-water emulsion droplets. After the core oil is dissolved in the surrounding bulk liquid, using solvents that are miscible with both the internal and external phases of the droplets, colloidosomes are formed. In this process, we find that the diameters of the colloidosomes are significantly reduced compared to those of the emulsion droplets. The reduction in the diameter is caused by rearrangement of the LDH platelets. That is, the platelets change their orientation from lying flat on the emulsion droplet surface to standing erect in a dense, face-to-face connecting pattern in the colloidosome shell. The main reason for the particle rearrangement is the increase of the attractive forces among the particles due to the reduced polarity of the solvents used during colloidosome preparation. © 2010.


Wang J.,Shandong University | Liu G.,Shandong University | Liu G.,Shandong Institute of Education | Wang L.,Shandong University | And 3 more authors.
Colloids and Surfaces A: Physicochemical and Engineering Aspects | Year: 2010

Liquid paraffin-water emulsions were prepared which were stabilized by Laponite particles in situ modified with poly(oxypropylene)diamines in the absence of electrolytes. First, the characteristics of the Laponite dispersions in the presence of increasing concentrations of diamines were studied in detail. Infrared absorption spectra and zeta potential measurements confirm the adsorption of diamines on the Laponite particles. Adsorption isotherms further indicate highly affinitive L-type behaviors and the diamine molecules are deduced to lie with both end groups anchored on the particle surface and the poly(oxypropylene) chain exposed to the aqueous solution. Then, emulsions were prepared using the diamine-modified particles. Diamines and Laponite particles alone are ineffective emulsifiers, but a strong synergism is exhibited between them. Laser-induced fluorescent confocal micrographs and TEM observations demonstrate the arrangement of the particles on the emulsion surfaces and also reveal the stability mechanisms. The emulsion stability was also explored with optical microscopy and droplet size measurements. As the diamine concentration increases, the extent of emulsion creaming decreases and the droplet size correspondingly decreases. At a certain low diamine concentration, the extent of emulsion creaming decreases down to a minimum and the corresponding droplet size is the smallest. This optimal emulsion state is unchanged when the diamine concentration is further increased. © 2009 Elsevier B.V. All rights reserved.


Wang J.,Shandong University | Yang F.,China University of Petroleum - East China | Tan J.,Shandong University | Liu G.,Shandong Institute of Education | And 2 more authors.
Langmuir | Year: 2010

Liquid paraffin?water emulsions were prepared by homogenizing oil phases containing sorbitan oleate (Span 80) and aqueous phases containing layered double hydroxide (LDH) particles or Laponite particles. While water-in-oil (w/o) emulsions are obtained by combining LDH with Span 80, the emulsions stabilized by Laponite?Span 80 are always o/w types regardless of the Span 80 concentration. Laser-induced fluorescent confocal micrographs indicate that particles are absorbed on the emulsion surfaces, suggesting all the emulsions are stabilized by the particles. The difference of the particle-stabilized emulsion type may be explained by comparing particle contact angles and the oil?water interfacial tensions, indicating that more Span 80 molecules are adsorbed on the LDH particles than on Laponite. Apparently, the LDH particles are rendered more hydrophobic by Span 80, resulting in the formation of w/o emulsions. The long-term stability of the emulsions was also compared. Emulsions stabilized by Span 80 alone completely separate into two bulk phases of oil and water after 3 months. However, emulsion stability is greatly enhanced with the addition of LDH or Laponite particles. This synergism was accounted for by an increase of the dilational viscoelasticity modulus of the oil?water interface after particles were added to the aqueous phase. This increase indicates that the gel-like particle layer stays at the oil?water interface and resists emulsion coalescence. Scanning electron microscope (SEM) images display the presence of a firm layer surrounding the emulsion droplets and a three-dimensional particle network which extends into the bulk phase aiding emulsion stability. © 2009 American Chemical Society.


Jiang W.,Shandong University | Jiang W.,Shandong Institute of Education | Liu L.,Shandong University | Hao J.,Shandong University
Journal of Nanoscience and Nanotechnology | Year: 2011

Manganese(II)-substituted polyoxometalate, Na 6(NH 4) 4[(Mn II(H 2O) 3) 2(WO 2) 2(BiW 9O 33) 2] · 37H 2O (POM-Mn), was assembled within lyotropic hexagonal liquid crystal (LLC) formed in the roomtemperature ionic liquids (RT-ILs), ethylammonium nitrate (EAN), fabricating the POM-LLC inorganic-organic hybrid materials. Polarized optical microscope images combined with small-angle X-ray scattering (SAXS) results indicate that the introduction of POM-Mn does not destroy the structure of hexagonal LLCs. The increase of d spacing demonstrates the integration of POM-Mn within the basic unit of the hexagonal LLCs. The FTIR spectra of the POM-LLC hybrid material show the characteristic absorption peaks of W-O bond. The rheological results indicate POM-LLC hybrid materials are highly viscoelastic and that the apparent viscosity is enhanced due to the introduction of the POM-Mn. The tribological properties were explored to greatly extend the applications of POM-LLC composites in RT-ILs as lubricating materials. The research of magnetic properties indicates the POM-LLC composite is ferromagnetic, therefore illuminating the potential application in the fields of magnetic materials. © 2011 American Scientific Publishers.


PubMed | ShanDong Institute of Education
Type: Journal Article | Journal: Acta crystallographica. Section E, Structure reports online | Year: 2011

The title compound, [Fe(2)Ni(C(17)H(14)Br(2)N(2)O(2))(2)(CN)(4)(H(2)O)(2)] or [{Fe(C(17)H(14)Br(2)N(2)O(2))(H(2)O)}(2)(-CN)(2){Ni(CN)(2)}], is iso-structural with its Mn(III)-containing analogue. Each Fe(III) atom is chelated by a Schiff base ligand via two N and two O atoms and is additionally coordinated by a water mol-ecule, forming a slightly distorted octa-hedral geometry. The two Fe(III) centres are bridged by a square-planar Ni(CN)(4) unit, which lies on an inversion centre. A two-dimensional network is formed via O-HO and O-HN hydrogen bonds.


PubMed | ShanDong Institute of Education
Type: Journal Article | Journal: Acta crystallographica. Section E, Structure reports online | Year: 2011

In the title compound, [Mn(N(3))(2)(C(6)H(6)N(4))(2)], the Mn atom (site symmetry ) is bonded to two azide ions and two bidentate biimidizole ligands, resulting in a slightly distorted octa-hedral MnN(6) geometry for the metal ion. In the crystal structure, N-HN hydrogen bonds help to consolidate the packing.

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