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Articles by M. Suttajit
Total Records ( 2 ) for M. Suttajit
  K. Leamsomrong , M. Suttajit and P. Chantiratikul
  A simple, rapid and reliable flow injection analysis system for the determination of total phenolic compounds using the Folin-Ciocalteu method was established. The detection method was based on the reduction of a mixture of phosphotungstic and phosphomolybdic acid (Folin-Ciocaltue reagent) to tungsten and molybdenum oxide by phenolic compounds in the basic media and subsequent formation of a blue color product. The standard or sample solutions were injected into a carrier stream (distilled water) to react with a folin ciocaltue reagent and sodium carbonate to give the blue color product which was detected by spectrophotometer at 765 nm. The experimental conditions such as sample volume, flow rate of carrier and reagents, length of reaction coils and concentration of reagents were optimized. The relative standard derivation, RSD (20 replicates) of 5 ppm gallic acid was 0.72% with the detection limit (3S/N) of 0.0231 mg L-1. A good linear calibration curve in the range of 0.5-100.0 mg L-1 was obtained with regression equation y = 0.0123x + 0.021, R2 = 0.9991. The sampling throughput was 32 samples per hour. The effect of potential interferences such as citric acid, fructose and others were examined. The proposed method was successfully applied for the determination of the total phenolic compounds in tea.
  W. Aengwanich , M. Suttajit and N.-A. Narkkong
  Tamarind (Tamarindus indica L.) is a plant that belongs to the Leguminosae family and grows naturally in tropical and subtropical regions. Tamarind seed coat is composed of polyphenols especially procyanidin oligomers. The objective of this experiment was to determine the effect of polyphenols extracted from tamarind seed coat on differential white blood cell counts of broilers maintained at high environmental temperature. Broilers were divided into 2 groups. In group 1, broilers were maintained in environmental temperature at 26±2oC throughout experimental period, and in group 2, broilers were maintained in environmental temperature at 38±2oC and received polyphenols i.e. 0, 100, 200, 300, 400 and 500 mg/kg in diets. Differential white blood cell counts were investigated on days 1, 7, 14 and 21 of experimental period. The results revealed the following information: Lymphocyte and basophil levels of broilers maintained in the environmental temperature at 38±2oC and received polyphenols at 400 mg/kg in diet were increased (p<0.05). On the other hand, the heterophil and monocyte levels of broilers maintained in the environmental temperature at 38±2oC and received polyphenols at 400 mg/kg in diet were decreased (p<0.05). This occurrence indicated that polyphenols extracted from tamarind seed coat could reduce heat stress in broilers.
 
 
 
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