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Articles by Irakoze Pierre Claver
Total Records ( 2 ) for Irakoze Pierre Claver
  Irakoze Pierre Claver , Haihua Zhang , Qin Li , Zhou Kexue and Huiming Zhou
  Ultrasonic technology was applied for polysaccharides extraction from the Chinese malted sorghum and Response Surface Methodology (RSM) was used to optimize the effects of processing parameters on polysaccharides yields. Three independent variables were ultrasonic power (X1), extraction time (X2) and ratio of water to raw material (X3), respectively. The statistical analysis indicated that three variables and the quadratic of X1 and X2 had significant effects on the yields and followed by the significant interaction effects between the variables of X2 and X3 (p<0.05). A mathematical model with high determination coefficient was gained and could be employed to optimize polysaccharides extraction. The optimal extraction conditions of polysaccharides were determined as follows: Ultrasonic power 600 W, extraction time 4 min, ratio of water to raw material 30 ml/g. Under these conditions, the experimental yield of polysaccharides was 17.08±0.33%, which was agreed closely with the predicted value 17.06%.
  Irakoze Pierre Claver , Haihua Zhang , Qin Li , Huiming Zhou and Kexue Zhu
  The work consisted in optimizing steeping and germination condition and their effect on sorghum grain in term of malt loss, Soluble Solid (SS) yield, cold paste viscosity, amylase activity, tannin and protein content. The factors studied included steeping time and temperature with temperature and time of germination. Germination significantly affected the increase in malt loss, SS yield, amylase activity and protein content with a decrease in cold paste viscosity and tannin content of sorghum. Optimum conditions for sorghum were: steeping time for 24 h at 31oC and 4.5 d of germination at 30oC. Values predicted at optimum conditions by the response surface model for all responses were experimentally tested and close agreement between experimental and predicted values was observed.
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