Iranian Research Organization for Science and Technology (IROST) Innovative Food Technologies 2783-350X 5 3 2018 04 21 Effect of Ozone and citric acid pretreatments on the modified atmosphere packaging of cucumber Effect of Ozone and citric acid pretreatments on the modified atmosphere packaging of cucumber 361 372 551 10.22104/jift.2017.2344.1545 FA Mhammad Mirzaei M.Sc. student of Postharvest Technology, Associate and Assistant professors, respectively. Biosystems Engineering, Sari Agricultural Sciences and Natural resources University, Sari, Iran Reza Tabatabaekoloor Associate professor, Postharvest Technology, Biosystems Engineering, Sari Agricultural Sciences and Natural resources University, Sari, Iran Ali Motavali Assistant professor, Postharvest Technology, Biosystems Engineering, Sari Agricultural Sciences and Natural resources University, Sari, Iran Reza Esmaeilzadeh Kenari Associate professor, Food science and Technology Department, Sari Agricultural Sciences and Natural resources University, Sari, Iran Journal Article 2017 07 17 In this research, the effect of Ozone and Citric Acid pretreatments was examined for cucumber disinfection in packaging with modified atmosphere, with 2 gas composition including MAP1 (75% N2 + 15% CO2 + 10 % O2) and MAP2 (75% N2 + 10% CO2 + 15 % O2) and 2.5 and 5 g of Silica gel as moisture absorber. The samples were maintained in polyethylene package with 6µ thickness, inside a fridge with 40C temperature. The effect of mentioned treatments examined the qualitative properties of the cucumbers such as pH, weight loss percentage, tissue firmness, TSS, Chlorophyll, acidity (TA) in 20 days after packaging and also the amount of the final durability of the product before complete corruption. Results showed that the maintaining of the cucumbers will preserve the quality of product and increase the durability. The changes in acidity (TA) and TSS showed that the combination effect of ozone pretreatment, MAP1 gas composition and using 5g Silica gel has the best effect of the mentioned parameters. Also, the changes in pH, tissue firmness and Chlorophyll showed that the combined use of gas composition with higher CO2 (MAP1) along with ozone pretreatment and 5g of moisture absorber has the best effect on the cucumber samples. The comparison of the total durability confirmed that the combination of Citric Acid pretreatment, 2.5g moisture absorber and MAP2 gas composition with 33 days maintenance has the least durability and the combination of ozone pretreatment, 5g moisture absorber and MAP1 gas composition with 65 days maintenance has the most durability. In this research, the effect of Ozone and Citric Acid pretreatments was examined for cucumber disinfection in packaging with modified atmosphere, with 2 gas composition including MAP1 (75% N2 + 15% CO2 + 10 % O2) and MAP2 (75% N2 + 10% CO2 + 15 % O2) and 2.5 and 5 g of Silica gel as moisture absorber. The samples were maintained in polyethylene package with 6µ thickness, inside a fridge with 40C temperature. The effect of mentioned treatments examined the qualitative properties of the cucumbers such as pH, weight loss percentage, tissue firmness, TSS, Chlorophyll, acidity (TA) in 20 days after packaging and also the amount of the final durability of the product before complete corruption. Results showed that the maintaining of the cucumbers will preserve the quality of product and increase the durability. The changes in acidity (TA) and TSS showed that the combination effect of ozone pretreatment, MAP1 gas composition and using 5g Silica gel has the best effect of the mentioned parameters. Also, the changes in pH, tissue firmness and Chlorophyll showed that the combined use of gas composition with higher CO2 (MAP1) along with ozone pretreatment and 5g of moisture absorber has the best effect on the cucumber samples. The comparison of the total durability confirmed that the combination of Citric Acid pretreatment, 2.5g moisture absorber and MAP2 gas composition with 33 days maintenance has the least durability and the combination of ozone pretreatment, 5g moisture absorber and MAP1 gas composition with 65 days maintenance has the most durability. https://jift.irost.ir/article_551_f76e9dd287c01253fef15784ef79603b.pdf