Mohd Asraf Mohd Zainudin
Thumbnail Image
Preferred name
Mohd Asraf Mohd Zainudin
Official Name
Mohd Asraf, Mohd Zainudin
Alternative Name
Mohd Zainudin, Mohd Asraf
Zainudin, M. A.M.
Main Affiliation
Scopus Author ID
55539687700
Researcher ID
AAV-4476-2020

Research Output

Filters

1
1
1
Reset filters

Settings
Now showing 1 - 1 of 1
  • Publication
    Effect of Different Drying Process on the Protein-Thiol Content and the Physicochemical Properties of Water-Extracted Rice Bran Powder
    ( 2023-06-09)
    Kasman N.A.S.
    ;
    Mohd Sharizan Md Sarip
    ;
    Mohd Asraf Mohd Zainudin
    The effect of drying process of the water extracted rice bran powder on the protein-thiol and physicochemical properties was investigated. The rice bran extracted was prepared with water as solvent at high temperature and pressure using the autoclave equipment (121 °C, 15 psi, and 20 min) before undergone drying method using either spray dryer (BṺCHI Mini Spray Dryer B-290, LABOGENE, Denmark) or freeze dryer (CoolSafe 4-15L Freeze Dryers, LABOGENE, Denmark). The water-extracted rice bran powder (WRBP) yield, protein-free thiol compound, physical and functional properties were analyzed. The protein-thiol concentration was quantified using the 5,5 dithiobis (2-nitrobenzoic acid (DTNB) method while protein concentration was directly measured at 280 nm by UV-Vis Spectrophotometer. This was followed by physical properties (water solubility) and functional properties (foaming capacity and stability, water and oil absorption capacity) analysis. The powder yield of freeze-dried WRBP (7.69 ±0.29%) was significantly (p<0.05) higher than spray-dried WRBP (4.43 ±0.24%). The protein concentration of spray-dried WRBP (4.02 ±0.36 mg/mL) was higher than freeze-dried WRBP (3.91 ±0.75 mg/mL). Meanwhile, freeze-dried WRBP (1.22 ±0.36 nmol thiol/mg protein) had a higher thiol concentration than spray dried WRBP (1.18 ± 0.30 nmol thiol/mg protein). However, both results were not significantly different (p>0.05) between the drying method. Spray-dried WRBP had significantly (p<0.05) higher solubility in water compared to that of freeze-dried WRBP with values 1.22 ± 0.21% and 0.63 ± 0.34%, respectively. Freeze-dried WRBP had higher water and oil absorption capacity. There was no significant difference (p>0.05) in foaming capacity and stability for both drying treatments. In conclusion, the drying method for WRBP production could significantly affect the WRBP physicochemical properties.
      31  4