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Articles by M. Srisa-Ard
Total Records ( 2 ) for M. Srisa-Ard
  P. Chottanom and M. Srisa-ard
  The objectives of this study were to investigate the influence of osmotic solutions and their concentration on mass transfer and observe any effect on lycopene content, color and melting temperature (Tm) of tomatoes. The tomato pieces were osmosed in maltose (35, 50%), sucrose (35, 60%) and sorbitol (35, 60%), solutions for 2 and 6 h. Sucrose and sorbitol were highly effective in reducing water content in tomatoes, compared to maltose. Highest solid gain was found by using sorbitol. The 60% of sucrose and sorbitol caused the reduction of lycopene content and alternation of color. The evaluation of Tm was depended on osmotic agents and could be related with the solid mass fraction. The 50% was recommended for the frozen tomatoes, compared to sucrose and sorbitol.
  M. Srisa-Ard , Y. Baimark and Y. Srisuwan
  In this study, influence of intermolecular interactions between Silk Fibroin (SF) and Poly (ε-Caprolactone) (PCL) in homogeneous blend form on SF conformation changes and thermal properties of the blends was investigated and discussed. The SF/PCL blends were prepared by solution blending and precipitating method, respectively. Dimethylsulfoxide and isopropanol were used as a solvent and a non-solvent, respectively. The blends were characterized by Fourier Transform Infrared Spectroscopy (FTIR), Differential Scanning Calorimetry (DSC), Thermo Gravimetry (TG) and Scanning Electron Microscopy (SEM). Conformation transition of SF component from β-sheet to random coil forms can be induced by blending with PCL. Melting temperature and heat of melting of the PCL decreased as increasing the SF ratio. Thermal stability of the SF can be enhanced by blending with PCL. FTIR, DSC and TG results suggested that intermolecular hydrogen bonds were formed between SF and PCL molecules in the blends. Homogeneous morphology of blends was illustrated by SEM micrographs.
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