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Articles by A.M. Mat Jais
Total Records ( 2 ) for A.M. Mat Jais
  L.Y. Hui , A.M. Mat Jais , D. Krishnaiah , M. Sundang , N.M. Ismail , T.L. Hong and A. Bono
  Channa Striatus is known as snakehead fish or local name as haruan, has been always associated with its medical value especially in wound healing. This fish is rich in protein as well as others biochemical compounds such as polyunsaturated fatty acids and antioxidants. Usually, the haruan is extracted and marketed in the form of liquid concentrated as health food supplement. In this study, encapsulated haruan extract were produced using spray drying process. The main purpose is for easy handling and the preservation of the biochemical compounds. The biochemical compound in the powder produced is expected to have properties such as more stable and longer shelf life. K-carrageenan was used as coating material for the encapsulzation during the spray drying process. The properties of encapsulated powder produced were observed in term of particle size distribution, Fish Protein Hydrolysates (FPH) and moisture content. The process parameters of spray drying process studied were hot air inlet flow rate, temperature and the liquid feed flow rate. The experimental run and optimization were designed using Box-Behnken method as suggested by Response Surface Methodology (RSM). The optimum operation conditions for highest protein extracted with lowest moisture content and smallest particle size distribution were obtained at hot air inlet temperature and flow rate of 144.51°C and 400 mL h-1, respectively; whereas, the liquid feed flow rate is at 47 m3 h-1. The optimal properties of encapsulated powder obtained were 5.2850 μm, 91% of protein and 8.7% in moisture content.
  M.H.A. Rahim , A. Rozila and A.M. Mat Jais
  Haruan, the local name for snakehead Channa striatus, indigenous to Malaysia, is a tropical and air breathing carnivorous fresh water fish in the family Channidae, which have important economics value as consumption’s fish and medicine value. In this study, a total of 120 specimens of Haruan Channa striatus were collected from the sampling stations in Johor, Kedah, Kelantan, Pahang, Perak and Terengganu. The result of physical-chemical parameters of the natural habitat were mainly Dissolved Oxygen (DO) within range from 2.62-33.70 mg L-1; pH between 5.16-6.90; temperature within 29.43-31.86°C; turbidity of the water between -10.00 to 14.57 NTU; conductivity of 0.06-0.97 mS cm-1 and salinity of 0-20 ppt. In the mixed populations, length weight relationships indicated the pattern of negative allometric type of growth (b<3). The result shows that the length of frequency distribution by populations from Johor, Kedah, Kelantan, Pahang, Perak and Terengganu were 25.97±2.88, 29.97±4.75, 31.52±3.32, 27.74±3.16, 30.34±2.87 and 29.53±6.67 cm TL, respectively. Variation in twenty four morphometric characteristics of Haruan C. striatus were examined by multivariate analysis. The discriminant analysis and the Unweighted Pair Group Method with Arithmeric averaging (UPGMA) cluster analysis based on Mahalanobis distance between group centroids showed that populations at Kelantan, Perak and Terengganu had quite similar morphological distant, while Johor, Kedah and Pahang were rather different. Such measurements are useful in the management of different cultures of Haruan C. striatus for Good Agriculture Practices (GAP) in farming technology, as well as the basic for Good Manufacturing Practices (GMP) production.
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