<0.05). Optimum extraction conditions including temperature of 83.60 ºC, extraction time of 60.92 min and water to ethanol ratio of 59.09 were obtained. Regarding the diameter of the inhibition zone of microorganisms, the highest inhibition zone belonged to Saccharomyces cerevisiae and Staphylococcus aureus.The optimization of extraction method resulted in extracts with the highest antimicrobial activity, especially against yeast and Gram-positive bacteria. In addition, predicting evaluation models provided an effective step in selecting extraction conditions to achieve a combination of antimicrobial properties against each microbial group.]]>
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p. 127−142
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<0.05), while the effect of temperature on seeds surface ratio was not significant (p < /em>>0.05). Based on the numerical optimization method, optimized conditions for extraction of nettle seed gum were determined in terms of soaking temperature of 59 °C, soaking time of 3.4h (204 min) and water to seed ratio of 1:40. Under the optimum conditions, the seeds surface ratio, extraction yield and viscosity values were obtained as 2.39, 9.70% and 6.25 mPa/s, respectively. The results of this study are of practical value for designing post-harvesting and processing equipments for nettle seeds as well as extracting mucilage from the seeds.]]>
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p. 161−174
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≤0.05). Also, in evaluating the heterocyclic amines (HAAs) in cooked samples , HAAs and cooking loss changes in all treatments increased during cooking at 0, 8, and 16 days after refrigerated storage (p < /em>≤0.05). The fried samples with 1% oligosaccharide and acid soluble chitosan had the least amount of HAAs and cooking loss. The results of this study showed that chitosan 1% could prevent corruption in the fish fillet during storage in the refrigerator and could prevent the production of harmful and mutagenic compounds during cooking.]]>
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<0.05) reduced the amount of oil released from Sohan. The optimum conditions for the organogel production to the preparation of Sohan with desirable physical and chemical quality were 8.82% mono-glyceride and 7.03% wax. The comparison of the predicted sample with the experimental sample showed that there was no significant difference (p < /em><0.05) between the predicted and experimental samples, which indicates the proper fit of the predicted model for Sohan production based on organogel. The comparison of Sohan quality characteristics with the control sample showed that antioxidant activity, moisture content and sensory properties of Sohan samples prepared with optimal organogelol formulation were better than control samples and its ash and oil released was less than the control sample. Therefore, it is possible to replace suitable organogel with fat at optimum levels in the formulation of products such as Sohan without disruptive effect on the quality characteristics of the product.]]>
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<0.05) but no evidence of yeast and mold growth was observed. Therefore, oliveria decumbens essential oil and chitosan had a significant effect on improving the properties of grated carrots under modified atmosphere during cold storage.]]>
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>0.05) on moisture, fat, protein and ash content. Nisin nanoparticles, due to the presence of chitosan in the capsule structure, prevented the lipid oxidation and the sausages containing these compounds had the lowest TBARS at the end of the storage. Total viable count, molds and yeasts counts increased significantly (p < /em><0.05) during storage. At the end of 45 days, sausages containing sodium nitrite and nisin nanoparticles had the lowest total viable bacterial and molds and yeasts counts, respectively. The count of Staphylococcus aureus (2.5 Log CFU/g) and Escherichia coli (2 Log CFU/g) decreased significantly during storage (p < /em><0.05). It was found that sausage containing nisin nanoparticles had high sensory scores compared to other treatments. The results showed that the use of 200 ppm nisin nanoparticles in combination with 500 ppm of mixed extracts could be a novel step in the production of nitrite free frankfurter sausage with good quality characteristics and extended shelf life.]]>
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