نوع مقاله : مقاله پژوهشی

نویسندگان

1 گروه بیولوژی، دانشگاه آزاد اسلامی، واحد دامغان، دامغان، ایران

2 دانشگاه آزاد اسلامی، واحد تهران شمال

3 گروه زیست شناسی، دانشگاه آزاد اسلامی، واحد فلاورجان، اصفهان، ایران

4 دانشیار گروه علوم و صنایع غذایی، واحد دامغان، دانشگاه آزاد اسلامی، دامغان، ایران

چکیده

در دهه‌های اخیر، تلاش‌ها برای یافتن راه حل‌های سبز پایدار و جایگزینی مواد بسته‌بندی مرسوم با منابع طبیعی افزایش یافته است. در تحقیق حاضر، تأثیر عصاره متانولی گیاه بوقناق (0، 1، 3 و 5 درصد) بر برخی از ویژگی‌های فیزیکی-مکانیکی و فعالیت ضد باکتریایی فیلم‌های نشاسته بررسی شد. نتایج بررسی­ها نشان داد افزایش غلظت عصاره باعث افزایش قابل توجه (در سطح احتمال 5 درصد) در ظرفیت جذب آب (3.161.88 گرم آب بر گرم فیلم خشک) و نفوذپذیری بخار آب (11-10×1.6311-10×2.32 گرم بر متر ثانیه پاسکال) فیلم‌ها شده­است. انحلال­ پذیری فیلم‌ها در آب در محدودۀ 18.5318.21 درصد به دست آمد و با افزایش غلظت عصاره به صورت جزئی افزایش یافت. استحکام کششی و مدول یانگ به ترتیب در محدودۀ 19.3413.11 و 115.25100.14 مگاپاسکال متغیر بودند. در مقایسه با فیلم شاهد، فیلم‌های کامپوزیت انعطاف‌پذیرتر بودند و الاستیسیته به طور مداوم با افزایش درصد عصاره ارتقا یافت. فیلم‌ها فعالیت ضد باکتریایی خوبی علیه هر دو باکتری گرم-مثبت و گرم-منفی نشان داد. با توجه به نتایج به دست آمده در این تحقیق می‌توان گفت که با بهبود برخی ویژگی‌های فیلم نشاسته ساگو، استفاده از این فیلم‌های کامپوزیت در تولید مواد پوسته کپسول مطلوب خواهد بود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Study the influence of extract of Eryngium billardieri on physic-mechanical and antimicrobial properties of Sago starch edible films

نویسندگان [English]

  • Mansoureh Sadat Daneshzadeh 1
  • Hossein Abbaspour 2
  • Leila Amjad 3
  • Abdorreza Mohammadi Nafchi 4

1 Department of biology, Damghan Branch, Islamic Azad University, Damghan, Iran

2 Islamic Azad University, Tehran north Branch

3 Department of Biology Falavarjan Branch Islamic Azad University Isfahan Iran

4 Food Science & amp, Technology Department, Islamic Azad University, Damghan, Branch,, Damghan, Iran

چکیده [English]

In recent decades, efforts to find sustainable green solutions and replace conventional packaging materials with natural resources have increased. In the present research, the influence of methanol extract from Eryngium billardieri (0, 1, 3, and 5%) on some physico-mechanical properties and antibacterial activity of sago starch films was investigated. The results showed that increasing the extract concentration resulted in a significant (P 0.05) increase in the films' water absorption capacity (1.883.16 g water/g dry film) and water vapour permeability (1.6310-112.3210-11 g/m s.s.Pa).The solubility of the films in water was obtained to be in the range of 18.21‒18.53%, and increased slightly with increasing the extract concentration. Tensile strength and Young’s modulus changed in the range of 13.11‒19.34 MPa and 100.14‒115.25 MPa, respectively. Compared to the control film, the composite films represented more flexibility, and the elasticity was continually enhanced with an increasing percentage of the extract. Both gram-positive and gram-negative bacteria were resistant to the films' antimicrobial activity. Based on the results obtained in this study, due to the improved properties of the sago starch film, the composite films could be effectively used in the production of the capsule shell materials.

کلیدواژه‌ها [English]

  • Sago starch film
  • Methanol extract
  • Eryngium billardieri
  • Water solubility
  • Mechanical properties
  • Antibacterial activity
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