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Articles by Yonggang Wang
Total Records ( 2 ) for Yonggang Wang
  Guli Asa , Chun Zhang , Yonggang Wang , Meng He , Yilong Yin , Xiping Fan and Yanming Wei
  A rapid, sensitive and high throughput micro-plate method was established to quantify polysaccharides in this study. Anthrone-sulfuric acid micro-plate assay in a certain reaction was tested. A single test and a response surface methodology was applied to design and optimize four factors including reaction time, incubation temperature, anthrone concentration and the amount of anthrone in order to maximize R2 and minimize RSD in each standard curve which obtained in different conditions. It was demonstrated that the order of significant impacting R2 is incubation temperature, anthrone concentration, reaction time and the quantity of anthrone add to while the order of significant impacting RSD is incubation temperature, anthrone concentration, the amount of anthrone and reaction time. Preferred reactive condition is be discovered and the best incubation temperature is 96°C, the best reaction time is 36 min, anthrone concentration is 1.1 mg mL-1 and the amount of anthrone is 150 μL. The detectable range of this method is 20-260 μg L-1 under the optimized condition. Recovery test showed high accuracy and practicability in this method by recovery rate ranged in 99.5-100.6%. The method was successfully applied to quantify polysaccharides of different source and the method has high resistance to interference of protein during measurement process.
  Haimei Liu , Yonggang Wang , Kaixue Wang , Yarong Wang and Haoshen Zhou
 

One-dimensional (1D) nanorods of LiV3O8 single crystals have been fabricated by using well-defined home-made VO2 (B) nanorods as the vanadium resource, combined with a convenient solid-state reaction. The as-obtained LiV3O8 nanorods were characterized by XRD, TEM and SEM, indicating this material was highly crystalline and a single phase. The electrochemical performance of LiV3O8 nanorods as the positive electrode material for rechargeable lithium batteries was investigated, which demonstrated that as-prepared LiV3O8 nanorods exhibited as high as 348 mAh g-1 discharge capacity in first cycle at 20 mA g-1 current density, and still remained at 303 mAh g-1 at 50 mA g-1 afterwards; moreover, until 50 cycles, they kept 315 mAh g-1, recorded at 50 mA g-1. All these results imply that single-crystalline 1D nanorods of LiV3O8 are promising cathode material for rechargeable lithium batteries.

 
 
 
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