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Weifang, China

Weifang University is a university based in Weifang City, Shandong Province, China. Wikipedia.


Xing M.,Weifang University
Journal of Convergence Information Technology | Year: 2012

Open source software has become an increasingly threatening competitor to traditional proprietary software. Through a modified vertical differentiation model, this paper investigates how open source software affects the quality of proprietary software and software differentiation. Assume that proprietary software producer pursues profit maximization and open source software is freely available for users. Moreover, users need to bear higher opportunity costs in learning and maintaining open source software in comparison with proprietary software. The results show that the quality of proprietary software may not increase in the quality of open source software. This conclusion subverts the traditional understanding of people. Moreover, software differentiation between open source and proprietary software decreases with an increase in the usability or features level of open source software.


Zinc finger genes comprise a large and diverse gene family. Based on their individual finger structures and spacing, zinc finger proteins are further divided into different families according to their specific molecular functions. Genes in the CCCH family encode zinc finger proteins containing a motif with three cysteines and one histidine. They play important roles in plant growth and development, and in response to biotic and abiotic stresses. However, the limited analysis of the genome sequence has meant that there is no detailed information concerning the CCCH zinc finger family in tomato (Solanum lycopersicum). Here, we identified 80 CCCH zinc finger protein genes in the tomato genome. A complete overview of this gene family in tomato was presented, including the chromosome locations, gene duplications, phylogeny, gene structures and protein motifs. Promoter sequences and expression profiles of putative stress-responsive members were also investigated. These results revealed that, with the exception of four genes, the 80 CCCH genes are distributed over all 12 chromosomes with different densities, and include six segmental duplication events. The CCCH family in tomato could be divided into 12 groups based on their different CCCH motifs and into eight subfamilies by phylogenetic analysis. Analysis showed that almost all CCCH genes contain putative stress-responsive cis-elements in their promoter regions. Nine CCCH genes chosen for further quantitative real-time PCR analysis showed differential expression patterns in three representative tomato tissues. In addition, their expression levels indicated that these genes are mostly involved in the response to mannitol, heat, salicylic acid, ethylene or methyl jasmonate treatments. To the best of our knowledge, this is the first report of a genome-wide analysis of the tomato CCCH zinc finger family. Our data provided valuable information on tomato CCCH proteins and form a foundation for future studies of these proteins, especially for those members that may play important roles in stress responses. © 2014, Springer-Verlag Berlin Heidelberg.


Li J.,Weifang University
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the anion of the title compound, C7H10N +·C9H3Br4O4-·CH3O, the dihedral angles formed by the benzene ring and the mean planes of the carboxyl-ate and meth-oxy-carbonyl groups are 74.8 (5) and 75.0 (5)°, respectively. In the crystal, intermolecular N - H⋯O and O - H⋯O hydrogen bonds link the components into chains along [100]. Additional stabilization is provided by weak intermolecular C - H⋯O hydrogen bonds.


Li J.,Weifang University
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the crystal structure of the title compound, C2H 8N+·-C9H3Br4O 4 -·CH4O, intermolecular N - H⋯O and O - H⋯O hydrogen bonds link the components into chains along [001]. Additional stabilization is supplied by weak C - H⋯O and C - H⋯Br interactions.


Li Y.-F.,Weifang University
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title mol-ecule, C 11H 13ClN 2O, the five-membered ring has an envelope conformation. In the crystal, mol-ecules are linked into chains along [100] by inter-molecular N - H⋯O hydrogen bonds. © Yu-Feng Li 2011.

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