Reihaneh Jahangiri; Hassan Hamedi; Hamed Ahari
Abstract
The use of new preservation methods based on natural substances of plant and animal origin in food is expanding. Edible coatings can improve the quality of fresh and frozen products such as fish by preventing microbial growth, and decreasing lipid oxidation and moisture loss. The aim ...
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The use of new preservation methods based on natural substances of plant and animal origin in food is expanding. Edible coatings can improve the quality of fresh and frozen products such as fish by preventing microbial growth, and decreasing lipid oxidation and moisture loss. The aim of this study was to evaluate the effect of the edible coating of chitosan (0 and 2%), Baneh gum (0, 1 and 2 %), propolis extract (0, 1 and 2%), and nanoemulsion of ginger essential oil (0, 0.5 and 1 %) on the shelf life of fresh salmon fillets during 12 days refrigeration. The results showed that the coating had a significant effect on reducing the total count, psychrophilic bacteria, coliforms, and Pseudomonas count during storage. Also, coated samples showed lower pH and peroxide values than uncoated, but the coating had little effect on reducing thiobarbituric acid (TBARS) and total volatile nitrogen (TVBN) values. During the sensory evaluation, it was found that the chitosan coating with Baneh gum can maintain or improve the sensory properties and extend the shelf life of refrigerated fish.
Saeideh Bagheri; Pezhman Moradi; Fereshteh Nematolahi; Vahid Zarinnia; Vahid Abdossi
Volume 4, Issue 1 , March 2021, , Pages 5-9
Abstract
Chemical methods to grow and improve plants threaten the health of the environment. In a previous study, factors assuming that flavonoids properties for instance pH, temperature, time, and plant extract content were assayed. Tomato (Solanum lycopersicum) is the second most important vegetable in the ...
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Chemical methods to grow and improve plants threaten the health of the environment. In a previous study, factors assuming that flavonoids properties for instance pH, temperature, time, and plant extract content were assayed. Tomato (Solanum lycopersicum) is the second most important vegetable in the world in terms of its economic value. This experiment was conducted in a completely randomized block design with three levels of chitosan, sylamol, aqueous extract, and silver nanoparticles with three replications. Different concentrations of silver nitrate solution (10, 20, 30mg/ l), aqueous extract (10, 20, 30mg/ l), chitosan (0.1, 0.3, 0.5 v/v) and silamol (1/1000, 2/1000, 3/1000(v/v) and control treatment (distilled water) were applied. Nutritional content including lycopene, Total soluble solids concentration (TSS), vitamin C, zinc, iron, magnesium, phosphorus, calcium, and potassium. Factors assuming that flavonoids properties for instance pH, temperature, time, and plant extract content were assayed., Fe, Mn, P, Ca and K, are significantly affected by using treatment. Measurement of features was done at 4, 1, 3, 7, and 11 days. The results showed that the application of the above treatment at 30 ppm silver nanoparticles was more effective than all other nutritional characters. So, these natural matters could be used for increasing the quality of tomatoes.
