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This study focused on the quality, chemical composition, microbiological population, and sensory assessments of stored mackerel fish products such as bouillon and sauce during the cold storage (4 °C) condition throughout the 12 month of storage period. The fish contains appreciable amounts of moisture content (71.33 g/100 g), protein content (22.55 g/100 g) and fat content (4.60 g/100 g), whereas the ash content and carbohydrate was recorded 1.23 g/100 g, and 0.29 g/100 g respectively. The results of the present study showed that the proximate chemical compositions of storage of both products generally increased at the end of the storage period to reach 10.05 g/100 g for protein content, 61.29 g/100 g for carbohydrate, and 17.01 g/100 g for ash content in stock powder. Besides, the sauce has detected an increase in protein content (4.05 g/100 g), fat content (21.12 g/100 g), ash content (3.41 g/100 g) and carbohydrate (15.09 g/100 g) respectively. The counts of Fecal coliform bacteria and Staphylococcus aureus were less than 10 indicating the good hygienic quality of the developed products. The total aerobic plate counts were significantly (p < 0005) higher in mackerel fish sauce (3.0×102 CFU/g) compared to stock powder (1.5×102 CFU/g). Yeast counts were found higher in mackerel sauce (1.9×102 CFU/g) compared to mackerel stock powder (1.2×102 CFU/g) at the end of storage period. The sensory score was slightly reduced after the storage period. In mackerel fish sauce, the long storage period had adversely affected the appearance (8.25), color (8.75) and odor (8.45) of the product, whereas, it enhanced the taste 9.00, and did not affect the texture (8.75) and overall acceptability (8.70). Overall, scores of all sensory attributes of both products were high indicating the acceptability of these products by panellists. The date showed the benefits mackerel fish products and their availability after storage for 12 months.

This study was to investigate the effects of combination of calcium carbonate with irradiation technique on quality characteristics, nutritional values, bioactive components, microbiological loading, and sensory evaluation of pumpkin jam during storage period for 12 months. Pumpkin jam samples were treated with calcium carbonate 1% (CCS), irradiation (2 kGy) and the combination of CCS + 2 kGy. The results indicated that the CCS + 2 kGy treatment significantly helped in retaining ascorbic acid content, which established a little decrease. CCS and CCS + 2 kGy treatments reported similar values for carotenoid contents. Whereas, CCS + 2 kGy treatment showed the highest total flavonoid content. The application of CCS + 2 kGy treatment also reduced the microbial growth for total aerobic plate, yeast and mold counts. The degree of color was higher recorded for CCS treatment, while CCS + 2 kGy treatment gained the highest scores for texture, flavor, taste, and overall acceptability at the end of the storage period. Overall the results pertained that the use of Gamma irradiation combined with calcium carbonate prolonged the shelf life of the pumpkin jam by reduced the microbial load, maintained the quality characterizes, nutritional values, bioactive components, and consumer acceptability of pumpkin jam during storage.

Fish meats comprise an important part of diets; however, their rich nutrient composition and various sources mean these products can be spoiled quickly. The present study assessed the chemical and microbiological quality of imported chilled, frozen, and locally cultured fish in Saudi Arabian markets. Physiochemical, heavy metal, and microbial analysis were performed for 50 samples of fish from three sources. The results indicated that locally cultured fish were of better quality than imported fish. All of the locally cultured fish samples were under the limit of total volatile basic nitrogen TVB-N (30 mg/100 g) for fish, while 22.73% and 7.16% of frozen imported and chilled imported fish respectively were over TVB-N limit. Furthermore, chemical and microbial contamination in some fish samples exceeded the recommended permissible levels. We conclude that there was poor sanitation practice and unsuitable conditions during the production and handling processes of fish.

Fish and fish products of the most available protein sources for human beings. Indian mackerel is the most available and economic fish sold in markets in different countries and is included in many local dishes. Indian mackerel are characterized by dark muscles because of the high contents of myoglobin and lipids. This study aims to investigate the chemical composition, saturated and unsaturated fatty acid contents, and fatty acid fractions in Indian mackerel muscle. Indian mackerel (R. kanagurta) were purchased from the central fish market in Jizan, which is caught from the port of Jizan, Saudi Arabia. The samples were analyzed to estimate the proximate chemical composition, Lipid Fractions, and Fatty acid analyses from Indian mackerel. In this study, revealed that moisture, protein, and fat are the main constituents of Indian mackerel. The Indian mackerel contained high and comparable levels of saturated fatty acids and unsaturated fatty acids, and the different samples exhibited somewhat similar fatty acid contents. Among unsaturated fatty acids, the content of polyunsaturated fatty acids was higher than that of monounsaturated fatty acids, and those with the highest levels in Indian mackerel were palmitoleic, palmitic, myristic, oleic, 15-tetracosenoic, linolenic, and stearic acids in addition to docosanoic, eicosanoic, 5,8,11,14,17-eicosapentanoic, and 11-eicosenoic pentadecanoic acids. We conclude Indian mackerel is a rich source of protein and lipids. Polyunsaturated fatty acids are the main constituents of lipids, which exert positive effects on the body by providing the main nutrients and preventing disease in the consumer.