تولید فیلم کفیران-پلی یورتان پایه آبی حاوی اسانس رزماری جهت نگهداری گوشت شترمرغ

نوع مقاله: مقاله پژوهشی

نویسندگان

گروه علوم و صنایع غذایی، دانشکده علوم کشاورزی و صنایع غذایی، واحد علوم و تحقیقات، دانشگاه آزاد اسلامی، تهران، ایران.

چکیده

ویژگی­های فیزیکوشیمیایی و ضدمیکروبی فیلم کفیران- پلی­یورتان پایه آبی حاوی اسانس رزماری با غلظت­های 2، 4، 6، 8 و 10 درصد حجمی/حجمی بررسی شد. با افزایش غلظت اسانس تصاویر میکروسکوپ الکترونی غیریکنواختی و حفره­دار شدن فیلم­ها را نشان دادند، در حالیکه ضخامت فیلم­ها تغییر معنی­داری را نشان نداد (05/0
p ). میزان نفوذپذیری به بخار آب تا غظت 6 درصد افزایش و با ادامه افزایش غلظت کاهش معنی­داری را نشان دادند (05/0 > p). قطر هاله عدم رشد فیلم­ها، قدرت مهارکنندگی بالاتر اسانس رزماری علیه Staphylococcus aureus نسبت به Escherichia coli را نشان دادند. نمونه­های که با فیلم ضدمیکروبی بسته­بندی شدند در پایان 12 روز زمان نگهداری در یخچال، کاهش Log cfu/g 2، 7/1 و 85/1 سیکل لگاریتمی به ترتیب در شمارش کلی میکروارگانیسم­ها، E. coli و S. aureus را نشان دادند. فیلم ضدمیکروبی تولیدی پتانسیل کاربرد جهت بسته‌بندی موادغذایی مختلف را دارا می­باشند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Preparation of Kefiran-waterborne Polyurethane Film Incorporated with Rosmarinus officinalis Essential Oil for Keeping Ostrich Meat

نویسندگان [English]

  • Fatemeh Hedayati Rad
  • Anousheh Sharifan
  • Gholamhassan Asadi
Department of Food Science and Technology, Science and Research Branch, Islamic Azad University, Tehran, Iran.
چکیده [English]

The physicochemical and antimicrobial properties of kefiran-waterborne polyurethane blend film incorporated with Rosmarinus officinalis essential oil with concentrations of 2, 4, 6, 8 and 10 %v/v were investigated. By increasing the concentration of the essential oil, the scanning electron microscopy images showed inhomogeneous and pores in the films structures, while thickness of the resulting films did not show a significant difference (p > 0.05), but significant decrease and increase were obtained for tensile strength and elongation at break, respectively (p < 0.05). The water vapor permeability of films was increased up to 6% of essential oil but with further increase, it was significantly decreased (p < 0.05). The results of inhibition zone test showed that the antimicrobial inhibitory properties of Rosmarinus officinalis essential oil against Staphylococcus aureus were greater than Escherichia coli. Decrease of 2, 1.7 and 1.85 logarithmic units was respectively observed in total count of microorganisms, E. coli and S. aureus on ostrich meat during 12 days of storage in the refrigerator. The produced antimicrobial film has the potential to be applied in the packaging of different food.

کلیدواژه‌ها [English]

  • Kefiran-waterborne polyurethane film
  • Rosmarinus officinalis essential oil
  • Ostrich meat

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