اثر ضد باکتریایی اسانس نارنج و بسته‌بندی اتمسفر تغییر یافته در کنترل استافیلوکوکوس اورئوس در توفوی ماهی تحت تاثیر دما، نمک و pH

نویسندگان
1 گروه شیلات، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
2 گروه علوم و صنایع غذایی، واحد اهواز، دانشگاه آزاد اسلامی، اهواز، ایران
چکیده
این پژوهش با هدف تاثیر دما، pH، نمک، اسانس نارنج (Citrus aurantium L.) و بسته‌بندی اتمسفر تغییر یافته (50 درصد دی‌اکسیدکربن، 45 درصد نیتروژن و 5 درصد اکسیژن) در کنترل استافیلوکوکوس اورئوس در توفوی ماهی از نوع توصیفی ـ تحلیلی در سال 97-1396 انجام شد. در این پژوهش pH در سطوح 5/5، 6 و 5/7، دما در سه سطح 4، 25 و 37 درجه سانتی‌‌گراد، نمک به میزان 0، 5/1 و 3 درصد و اسانس نارنج در سطوح 0، 025/0 و 05/0 درصد در نظر گرفته شد. با توجه به نتایج به دست آمده مشاهده شد که هرچه pH نمونه‌های توفوی ماهی پایین‌تر بود، رشد استافیلوکوکوس اورئوس محدودتر شد. در pH 5/5 با 025/0 و 05/0 درصد اسانس نارنج در نمونه‌های توفوی ماهی عدم رشد باکتری مشاهده شد، اما در pH 6 و 5/7 عدم رشد باکتری مشاهده نشد و رشد آنها به بیش از میزان مجاز رسید. با افزایش دما به 25 و 37 درجه سانتی‌گراد و نیز در pH 5/5، 6 و 5/7 رشد استافیلوکوکوس اورئوس در توفوی ماهی افزایش یافت. در این پژوهش اسانس نارنج در سطح 05/0 درصد در دمای 4 درجه سانتی‌گراد، نمک 3 درصد و pH 5/5 قدرت کنترل رشد استافیلوکوکوس اورئوس در توفوی ماهی را طی 8 روز نگهداری داشت.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Antimicrobial effect of Citrus aurantium essential oil, modified atmosphere packaging in controlling Staphylococcus aurous in tofu fish during 12 days of storage

نویسندگان English

laleh Roomiani 1
mehrnosh tadayoni 2
1 Department of Fisheries, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
2 Department of Food Science and Technology, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran
چکیده English

The aim of this study was to determine the effect of temperature, pH, salt, citrus aurantium L. and modified atmosphere packaging (50% carbon dioxide, 45% nitrogen and 5% oxygen) on control of Staphylococcus aurous in fish tofu of type. Descriptive-analytic study was carried out in the year of 2017-2018. In this research, pH was 5.5, 6 and 7.5, and temperature was 4, 25 and 37 ° C, salt at 0, 1.5 and 3%, and orange essential oil at 0.025 and 0.05% was considered. According to the results, it is found that the lower the pH of the tofu samples is lower, Staphylococcus aureus is more restricted. For example, at pH 5.5 with 0.025 and 0.05% of orange essential oil in tofu samples, bacteria did not grow, but at pH 6 and 7.5 there was no growth of bacteria and growth was more than usual. There was an enormous increase in Staphylococcus aurous at pH 7.5 with 1.5% salts and orange essential oil 0.025% at temperatures of 4, 25 and 37 ° C. Increasing temperature to 25 ° C and 37 ° C, as well as at pH 5.5, 6 and 7.5, the growth of Staphylococcus aurous in tofu fish has been increased. In this study, the essential oil of orange herb was stored at 0.05 % at 4 ° C, 3% salt and pH 5.5, to control the growth rate of Staphylococcus aurous in tofu fish for 8 days.

کلیدواژه‌ها English

Fish tofu
Modified atmosphere packaging
Citrus aurantium L. essential oil
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