Research has been carried out on seaweed-based irradiated functional food ingredients (carrageenan and alginate). This research aimed to determine and analyze the effect of irradiation on the Physico-chemical and microbiological quality of seaweed-based food ingredients. Sample preparation was carried out by preparing carrageenan and alginate flour, then packaged and irradiated with gamma rays at doses of 3, 5, and 7 kGy (0 kGy as control). Samples were stored at room temperature immediately after irradiation and then tested for Physico-chemical properties (moisture content, pH, water activity (aw), protein content, ash content, and viscosity) and microbiological properties (total aerobic microbes, total coliform, total molds and yeast). The results showed that the radiation dose of 3-7 kGy was effectively improved the hygienic quality of seaweed-based functional food (carrageenan and alginate) and optimum at a dose of 5-7 kGy, without changing the water content, pH, and aw. Meanwhile, the viscosity of the material increases with increasing radiation dose.
This study was aimed to investigate the meatballs physical qualities that are irradiated with high-doses of gamma rays. This study used the irradiation method with the dosage of 20, 25 and 35 kGy and storage at room temperature. For the control (0 kGy), storage was done in the freezer. The results showed that at 0 month, the samples water contents at 20; 25; 35 kGy were 67,03%; 67,50%; 66,67%, with significant difference (p<0.05) to control 68,73%. Water content (%) at 2 months were 65,03%; 66.00%; 67.50% and control 63,23% 2 months has significant difference (p<0.05) but still meet the SNI standard (<70%). Optimum water activity was obtained at irradiation dose of 35 kGy. The pH results doses of 20; 25; 35 kGy for 0 month were 6,35; 6,34; 6,39 and 2 months were 6,59; 6,47; 6,46, respectively. pH of control was 5,87 at 0 month and 6,49 at 2 months. The pH of samples stored for 0 month were relatively higher than the control pH. At 2-month storage, the pH of the samples was lower than the control, but still meets the standard. Meatball irradiation up to 35 kGy can be used as an alternative for preservation at room temperature.
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