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Articles by Yu Sun
Total Records ( 2 ) for Yu Sun
  Hong-Bo Liu , Yu Sun , Ya-Guang Chen , Fan-Xia Meng and Dong-Mei Shi
  Three neutral polyoxometalates [PVW11O40lcubM(phen)2H2Orcub2] · 3H2O (phen = 1,10’-phenanthroline, M=Co 1, Zn 2, Ni 3) are composed of water and the neutral Keggin-type polyoxometallate covalently linking a pair of transition metal complex fragments on opposite sides. The transition metal lies in the center of a distorted octahedron. Multi hydrogen-bonding interactions between coordinated waters of neutral polyoxometalate molecules and terminal oxygen atoms of Keggin units and between bridging oxygens of Keggin units and lattice water create a two dimensional layer and between the layers there exist van der Waals forces. The framework of the neutral molecule begins to decompose at ca 500°C. Compound 1 exhibits a weak antiferromagnetic interaction in the 2-300 K range.
  Yinghua SHI , Zirong XU , Yu SUN , Chengzhang WANG and Jianlei FENG
  Experiments were conducted to compare the efficacy of montmorillonite (M) and montmorillonite nanocomposite (MN) to reduce the toxicity of aflatoxin (AF) in broiler chicks from 0 to 42 days of age. A total of 240 chicks were assigned to 6 dietary treatment groups (0 g of adsorbents and 0 mg of AF/kg feed, 3 g of M/kg feed, 3 g of MN/kg feed, 0.11 mg of AF/kg feed, 0.11 mg of AF plus 3 g of M/kg feed, and 0.11 mg of AF plus 3 g of MN/kg feed). Compared to the control, AF alone significantly decreased ADG and feed efficiency. Marked improvements in performance by the addition of MN to AF diet demonstrated the ability of MN to reduce the toxic effects of AF. However, the addition of M can not diminish the growth inhibitory effects of AF. AF intake markedly increased relative weights of liver, kidney, spleen, and pancreas, and resulted in significant alterations of serum biochemical values and enzymatic activities. Chicks fed MN with AF diet had apparent recovery or restoration of AF-induced organ lesions and aberrations in serum profiles, whereas chicks fed M with AF diet had relative organ weights and serum profiles similar to those of chicks fed AF alone, which indicated beneficial effects of MN and nonprotective effects of M. These findings suggest that feeding MN can effectively prevent the adverse effects associated with aflatoxicosis in broiler chicks.
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