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Abstract : Universiti Pendidikan Sultan Idris |
The purpose of this study was to evaluate the effect of electron beam irradiation at
different dosages towards the quality of hydrolysed collagen samples from Oreochromis mossambicus’s
scales. Hydrolysed collagen samples powder were irradiated using electron beam at doses of 5, 10,
15 and 20 kGy. After being irradiated, samples were individually vacuum-packaged and stored at 4°C
for four weeks. Then, the total number of coliform, yeast and mould, pH, macronutrients of samples,
and molecular weight of the samples’ protein were investigated. This study also determined the
effect of hydrolysed collagen samples at different concentrations towards the viability and
proliferation of skin fibroblast primary cell. The results showed that total number of coliform,
yeast and mould decreased with the increment of irradiation dosage, but, no coliform, yeast and
mould growth in 15 and 20 kGy samples. Meanwhile, the D10 value of coliform is 14.43 kGy whilst
yeast and mould is
13.76 kGy. The samples’ pH values and macronutrients evaluation did not show any significant
differences between non-irradiated and irradiated samples. Sodium dodecyl sulphate polyacrylamide
gel electrophoresis (SDS-PAGE) separated two bands of protein between 17.75 to 23.5 kDa. It also
showed that electron beam irradiation dosage did not cause any substantial change of
electrophoretic pattern on molecular weight of hydrolysed collagen. The concentration of hydrolysed
collagen between 4 mg/mL to 10 mg/mL has increased the viability and proliferation of normal skin
fibroblast primary cell. As a conclusion, the results suggest that electron beam
irradiation is useful in improving microbial safety without impairing the quality of hydrolysed
collagen. The implication of this study is hydrolysed collagen from O.mossambicus’s scales can be
used to increase the number and proliferation of skin
fibroblast cell and would be essential for any skin care and pharmaceutical use.
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