To investigate the effect of active composite coating carboxymethyl cellulose-based on the shelf life of rainbow trout (Oncorhynchuus mykiss) fillet during refrigerator temperature storage, an experiment for 12 days with 5 treatments including uncoated (control), carbox More
To investigate the effect of active composite coating carboxymethyl cellulose-based on the shelf life of rainbow trout (Oncorhynchuus mykiss) fillet during refrigerator temperature storage, an experiment for 12 days with 5 treatments including uncoated (control), carboxymethyl cellulose 1%, carboxymethyl cellulose-oleic acid 1%, carboxymethyl cellulose-oleic acid-Echinacea extract (0.5% or 1%) and 3 replications was carried out. Chemical (PV, TBARS, and TVN) and microbial (TVC and PTC) tests were performed on the fillets every 3 days. The results showed that oleic acid improved the protective effect of carboxymethyl cellulose coating. The antioxidant and antibacterial effect of Echinacea extract was concentration dependent. At the end of the storage period, the lowest values of PV (3.90±0.11 meq/kg), TBARS (1.24±0.27 mg MDA/kg), TVN (21.90±1.83 mg/100g), TVC (5.10±0.10 log cfu/g) and PTC (5.23±0.06 log cfu/g) were found in fillets containing active composite coating of carboxymethyl cellulose-oleic acid-1% Echinacea extract (P <0.05). Therefore, the composite coating of carboxymethyl cellulose-oleic acid-1% Echinacea extract can be used as an active packaging to maintain the quality and increase the shelf life of rainbow trout fillets during short-term storage at refrigerator temperature.
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Because of the importance of identifying the native genotypes and selecting the appropriate cultivars for successful development of olive tree cultivation, the present study was conducted to evaluate the selected oil and table genotypes compatible with climatic conditio More
Because of the importance of identifying the native genotypes and selecting the appropriate cultivars for successful development of olive tree cultivation, the present study was conducted to evaluate the selected oil and table genotypes compatible with climatic conditions of Gorgan. The experiment was done in a completely randomized design with three replications on 24 genotypes in Hashemabad complex in Golestan province. The maturity index of fruit was measured according to a method suggested by International Olive Oil Council and the percentage of oil was determined using a soxhlet method. Six genotypes with higher percentage of oil were selected and the physicochemical properties of the oil and the percentage of fatty acids were determined. Results showed that the highest and lowest fruit weights were observed in genotypes I7 and E6, respectively. The highest percentage of fruit flesh was observed in I7. E11 and D5 had the highest percentages of oil in dry and fresh matter. The lowest acidity was observed in B7 and the lowest peroxide was seen in E11. Genotypes F1 and E11 had the highest oil phenolic compounds. A10 showed the highest amounts of chlorophylls and carotenoids. F9 had the lowest indexes of K232 and K270 and following that A10 had the lowest index of K270. The highest percentage of oleic acid and the lowest percentage of linoleic acid were observed in A10. Genotype B7 had the lowest percentage of palmitic acid. Due to fruit weight, percentage of flesh and fruit sphericity, eight table genotypes were selected for further study. Among the selected table genotypes, genotype I7 had the highest levels of flavonoids, phenolic compounds, antioxidants, and anthocyanin. According to the results, the best oil genotypes were A10 and E11, the best table genotype was I7 and the best dual-purpose genotypes were F10 and B7.
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Salinity is one of the most important issues that significantly reduce the area of arable land and also the amount of production and product quality. Identification and domestication of salinity-resistant plant species which have economic value is an important strategy. More
Salinity is one of the most important issues that significantly reduce the area of arable land and also the amount of production and product quality. Identification and domestication of salinity-resistant plant species which have economic value is an important strategy. This study was conducted for evaluation of oil percent and fatty acids content in some wild halophyte’s plants. The results showed that the highest percentage of oil (14.20%) was obtained in Salicornia saline plant and the lowest amount (2.65%) was obtained in Halostachys caspica salinity plant. The highest levels of palmitic acid, stearic acid and linolenic acid were observed in Halostachys caspica. The highest amount of linoleic acid was obtained in Salicornia, Anabasis setifera and prickly pear plants and the lowest amount was obtained in Halostachys caspica. The highest total of saturated fatty acids was obtained in Halostachys caspica plant. The highest total of unsaturated fatty acids was observed in Salicornia and saline plants. In general, the results of this study showed that the use of halophyte species as a source of vegetable oil is economical, because these plants do not compete on quality soil and water with conventional crops. In addition, the percentage of unsaturated fatty acids in all studied species except Halostachys caspica was shown to be high and equal to most oilseeds. Due to the ability of these plants to grow in saline soils, they can be used as a resource of oil extraction in this condition.
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Caper (Caparis spinosa L.) is a herbaceous and perennial plants belonging to the Capparidaceae family. The different species of Caparis are valuable plants which have used as a medicine, food and spices. This research was conducted for evaluation of oil percent and fatt More
Caper (Caparis spinosa L.) is a herbaceous and perennial plants belonging to the Capparidaceae family. The different species of Caparis are valuable plants which have used as a medicine, food and spices. This research was conducted for evaluation of oil percent and fatty acids composition of some caper genotypes in several regions of south Iran. Oil extraction and determination of fatty acids were done by Soxhlet and Gas Chromatography, respectively. The oil percent in studied genotypes varied from 21.10% (Dashte-arzhan genotype) to 29.70% (Noor Abad genotype). In caper seed oils, 12 different fatty acids were identification. The highest amounts of saturated fatty acids were related to palmitic (C16:0) and stearic acids (C18:0). Also, linoleic acid C18:2(n-6), oleic acid C18:1(n-9) and plmitoleic acid (C16:1) were the main unsaturated fatty acids. The highest amount of linoleic acid (46.74%), palmitoleic acid (2.93) and oleic acid (37.92%) were observed in Noorabad, Kaskan and Parishan genotypes, respectively. The highest and the least value of unsaturated fatty acids were measured in Saadat-shahr and Ghaleh-sefid genotypes. In over all, according to obtained results, there are noticeable variation were observed among caper genotypes in terms of oil percent and fatty acid components. Seed oils of caper due to possess noticeable unsaturated fatty acids, which are important role on human health can be consideration as plants oil resources.
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