Yuan Li

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Publications (3)4.26 Total impact

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    Article: Poly[diaqua-bis-{μ-5-[4-(1H-imidazol-1-ylmethyl)phen-yl]tetra-zolato}copper(II)].
    Yuan Li, Ruizhan Chen
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    ABSTRACT: In the title compound, [Cu(C(11)H(9)N(6))(2)(H(2)O)(2)](n), the Cu(II) atom lies on an inversion center and is coordinated by four N atoms from four 5-[4-(1H-imidazol-1-ylmethyl)phen-yl]tetra-zolate ligands and two water mol-ecules in a distorted octa-hedral geometry. The ligands bridge the Cu(II) atoms, leading to the formation of a two-dimensional network parallel to (100). The structure is further stabilized by O-H⋯N hydrogen bonds within the network.
    Acta Crystallographica Section E Structure Reports Online 05/2012; 68(Pt 5):m622. · 0.35 Impact Factor
  • Article: Optimization of ultrasonic extraction process of polysaccharides from Ornithogalum Caudatum Ait and evaluation of its biological activities.
    Ruizhan Chen, Yuan Li, Hang Dong, Zhiqiang Liu, Shizhe Li, Simin Yang, Xinlong Li
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    ABSTRACT: Ultrasonic extraction technique (UET) was used to extract crude polysaccharides (OCAP) from Ornithogalum Caudatum Ait (OCA), an orthogonal experiment (L(9) (3)(4)) was applied to optimize extraction conditions. Membrane separation technology and gel filtration chromatography were used to fractionate OCAP, the antioxidant and immunomodulatory activities were evaluated by radical scavenging and spleen lymphocyte proliferation assay. The optimal conditions were determined: extraction time 60min, ultrasound power 500W, ratio of water to raw material 30ml/g and extraction number 3. Under these conditions, the yield of OCAP was 36.77±1.76%. OCAP was fractionated into three major fractions (OCAP-I, OCAP-II and OCAP-II), that all fractions possessed considerable antioxidant activity. OCAP-II and OCAP-III exhibited good immunomodulatory activities. The results indicated that UET is a very useful method for extraction bioactive polysaccharides from plant materials. OCAP could be explored as a potential antioxidant and immunostimulating agent for use in medicine or functional foods.
    Ultrasonics Sonochemistry 03/2012; 19(6):1160-8. · 3.57 Impact Factor
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    Article: catena-Poly[[[dibromidocadmium]-μ(2)-1,1'-(butane-1,4-di-yl)bis-(pyridinium-4-carboxyl-ate)] monohydrate].
    Feijun Guo, Yuan Li, Simin Yang, Ruizhan Chen
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    ABSTRACT: In the title compound, {[CdBr(2)(C(16)H(16)N(2)O(4))]·H(2)O}(n), the Cd(II) ion is six-coordinated by a Br(2)O(4) donor set, with four O atoms from two bridging 1,1'-(butane-1,4-di-yl)bis-(pyridinium-4-carboxyl-ate) ligands. The ligands link the Cd(II) ions into a zigzag chain extending along [0[Formula: see text]1]. O-H⋯O and O-H⋯Br hydrogen bonds involving the uncoordinated water mol-ecules connect the chains.
    Acta Crystallographica Section E Structure Reports Online 06/2011; 67(Pt 6):m729. · 0.35 Impact Factor
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