بررسی ویژگی‌های رئولوژیکی، فیزیکوشیمیایی و حسی بستنی سین‌بیوتیک با کاربرد فیبر حاصل از پوست میوه‌جات و باکتری لاکتوباسیلوس کازئی LC-01

نوع مقاله : مقاله پژوهشی لاتین

نویسندگان

• الهام مهدیان ¹
• رضا کاراژیان ²

¹ گروه علوم و صنایع غذایی، واحد قوچان، دانشگاه آزاد اسلامی، قوچان، ایران

² گروه پژوهشی بیوتکنولوژی صنعتی میکروارگانیسم‌ها، پژوهشکده بیوتکنولوژی صنعتی، جهاد دانشگاهی خراسان رضوی، مشهد، ایران

https://doi.org/10.22067/ifstrj.v16i1.72734

چکیده

یک غذا دارو می‌تواند اثرات سودمند بیشتری علاوه بر مزایای تغذیه‌ای ایجاد نماید. این اثرات عموما به اجزاء فعال موجود در این غذاها مربوط می‌شود. ضایعات میوه‌جات منبع غنی از فیبرهای رژیمی می‌باشند که اثرات مثبتی بر سلامتی انسان دارند. این فیبرها همچنین می‌توانند رشد و فعالیت باکتری‌های پروبیوتیک را در ماتریکس غذایی بهبود داده و بنابراین برای تولید محصولات غذایی سین‌بیوتیک مورد استفاده قرار گیرند.در این تحقیق اثر افزودن فیبر حاصل از پوست موز، سیب و انبه بر خصوصیات فیزیکوشیمیایی و حسی و همچنین قابلیت زنده‌مانی باکتری لاکتوباسیلوس کازئی LC-01 در بستنی در مدت 60 روز نگهداری در دمای 18- درجه سانتی‌گراد بررسی و با نمونه شاهد فاقد فیبر مورد مقایسه قرار گرفت. بر اساس نتایج به‌دست آمده مخلوط همه نمونه‌ها رفتار رقیق‌شونده با برش نشان دادند. با افزایش مقدار هر سه فیبر اندیس رفتار جریان کاهش و ضریب قوام افزایش پیدا کرد. مقادیر pH و وزن مخصوص نمونه‌های حاوی فیبر موز و انبه پایین‌تر از نمونه شاهد و نمونه‌های حاوی فیبر سیب بودند. استفاده از فیبرها اثر مشخصی بر ضریب افزایش حجم نمونه‌های بستنی نداشته اما مقادیر ویسکوزیته و مقاومت به ذوب با افزایش مقدار فیبرها افزایش یافت. بیشترین کاهش جمعیت لاکتوباسیلوس کازئی LC-01 بعد از انجماد و طی دوره نگهداری مربوط به نمونه شاهد بوده و افزودن فیبر قابلیت زنده‌مانی این باکتری را بهبود بخشید. کمترین کاهش جمعیت سلولی بعد از انجماد و ذخیره‌سازی مربوط به نمونه حاوی 5/1 درصد فیبر انبه و به‌ترتیب برابر با 03/0 و 48/0 سیکل لگاریتمی بود. خصوصیات حسی نمونه‌های حاوی فیبر سیب خوب و با نمونه شاهد قابل رقابت بود.

کلیدواژه‌ها

• فیبر
• بستنی
• پروبیوتیک
• سین بیوتیک

عنوان مقاله [English]

Study on rheological, physicochemical and sensory properties of synbiotic ice cream using fibers from some fruit peels and Lactobacillus casei LC-01

نویسندگان [English]

• Elham Mahdian ¹
• Reza Karazhyan ²

¹ Department of Food Science and Technology, Quchan Branch, Islamic Azad University, Quchan, Iran.

² Department of industrial biotechnology on microorganisms, Institute of industrial biotechnology, ACECR, Mashhad, Iran.

چکیده [English]

A nutraceutical food may provide expanded utility beyond its nutritional benefit. These benefits are commonly attributed to the active components of the food. Fruit by-products are rich source of dietary fibers that have beneficial effects on human health. Also they can improve the growth and viability of probiotics in food matrix and therefore suitable to produce synbiotic food products. In this study, the effect of adding fiber obtained from apple, banana and mango peels at levels of 0.5, 1 and 1.5% on physicochemical and sensory features and the viability of Lactobacillus casei LC-01 in ice cream during 60 days storage at -18°C was investigated. Based on the results, all ice cream mixes were pseudoplastic fluids. The values of flow behavior index decreased and consistency coefficients increased by increasing the level of all mentioned fibers. The pH and specific gravity of samples containing banana and mango fibers were lower than control and sample with apple fiber. Using fibers had no significant effects on overrun values, whereas viscosity and melting resistance of ice cream samples increased with increasing fiber amounts. The most reduction in Lactobacillus casei LC-01 count after freezing and during storage period was associated to control sample and adding all types of examined fibers improved probiotic viability. Minimum cell reduction after freezing and during storage period occurred in sample containing 1.5% mango fiber with 0.03 and 0.48 log cycle respectively. Sensory properties of samples containing apple fiber were good and comparable with control sample.

کلیدواژه‌ها [English]

• Fiber
• Ice cream
• Probiotic
• Synbiotic

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