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Articles by Dongsheng Li
Total Records ( 4 ) for Dongsheng Li
  Libin Xu , Yan Liu , Xia Zhu , Yong Shi and Dongsheng Li
  In the present study, a multi-layer perception neural network and Radial Basis Function (RBF) network were used to model of extract form lotus seed liquor lees of furfural content. Artificial neural network were used to model extract furfural from lotus seed liquor lees and comparison with the results obtained from a regression analysis. Owing to the furfural in lotus seed liquor was easy to mix with organic matter in any proportion. The appropriate extraction conditions guaranteed the maximum extract from lotus seed liquor lees. This study provided a theoretical basis for the production of liquor.
  Jian Li , Dongsheng Li , Long Tang , Yapan Wu , Wenliang Wang and Yaoyu Wang
  A metal-organic hybrid compound, Cu[(pyc)2(4,4’-bipy)] · H2O (pyc = pyridine-2-carboxylate, 4,4’-bipy = 4,4’-bipyridine), has been hydrothermally synthesized and characterized by X-ray determination, IR and elemental analysis. The compound crystallizes in tetragonal, space group I41/acd with a = 24.797(2) Aring, b = 24.797(2) Aring, c = 14.811(2) Aring, β = 90°, V = 9106.7(18) Aring3, C22 H18N4O5Cu, Mr = 481.94, Dc = 1.406 g cm-3, μ(Mo-Kagr) = 0.999 mm-3, F(000) = 3952, Z = 16, the final R = 0.0712 and wR = 0.1886 for 21727 observed reflections (I > 2σ). Compound 1 exhibits a three-dimensional interpenetrating network induced by weak Cu ··· N noncovalent interaction, C-H ··· π and π-π interactions. Based on crystal data, quantum chemistry calculation at the DFT/B3LPY level was used to reveal the electronic structure of 1.
  Yapan Wu , Dongsheng Li , Feng Fu , Long Tang , JIJIANG Wang and Xiao Gang Yang
  A zinc coordination polymer, Zn(IN)2 · 2H2O (1) (HIN = isonicotinic acid), has been synthesized and characterized by IR, elemental analysis, thermogravimetric analysis, and single crystal X-ray diffraction. This compound crystallizes in the chiral space group P62 with a = 15.512(3), b = 15.512(3), c = 6.262(2) Aring, V = 1304.9(5) Aring3, and Z = 3. The O and N atoms of the IN ligand are coordinated to a ZnII ion, locking the asymmetry of the IN ligand and transferring this asymmetry throughout the crystal structure to “direct” the formation of a chiral network. The structure of 1 is characteristic of a 3-D quartz-like framework, which contains hetero-chiral helical channels (pseudo-trigonal and hexagon channels) alternately along the c-axis. Compound 1 exhibits high stability and intense fluorescent emission at room temperature.
  Dongsheng Li , David A. Jans , Phillip G. Bardin , Jayesh Meanger , John Mills and Reena Ghildyal
  Cytoplasmic inclusions in respiratory syncytial virus-infected cells comprising viral nucleocapsid proteins (L, N, P, and M2-1) and the viral genome are sites of viral transcription. Although not believed to be necessary for transcription, the matrix (M) protein is also present in these inclusions, and we have previously shown that M inhibits viral transcription. In this study, we have investigated the mechanisms for the association of the M protein with cytoplasmic inclusions. Our data demonstrate for the first time that the M protein associates with cytoplasmic inclusions via an interaction with the M2-1 protein. The M protein colocalizes with M2-1 in the cytoplasm of cells expressing only the M and M2-1 proteins and directly interacts with M2-1 in a cell-free binding assay. Using a cotransfection system, we confirmed that the N and P proteins are sufficient to form cytoplasmic inclusions and that M2-1 localizes to these inclusions; additionally, we show that M associates with cytoplasmic inclusions only in the presence of the M2-1 protein. Using truncated mutants, we show that the N-terminal 110 amino acids of M mediate the interaction with M2-1 and the subsequent association with nucleocapsids. The interaction of M2-1 with M and, in particular, the N-terminal region of M may represent a target for novel antivirals that block the association of M with nucleocapsids, thereby inhibiting virus assembly.
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