تأثیر اینولین بر خصوصیات فیزیکوشیمیایی، میکروبی و حسی کفیر تولید شده از شیرگاومیش

نویسندگان
گروه علوم و صنایع غذایی، دانشگاه علوم کشاورزی و منابع طبیعی خوزستان
چکیده
کفیر نوشیدنی لبنی تخمیر شده است که با استفاده از دانه­های کفیر تولید می­شود و اثرات مفیدی بر سلامت انسان دارد. در این پژوهش تأثیر افزودن اینولین (5/0، 1 و 5/1درصد) بر خصوصیات فیزیکوشیمیایی‌ ‌‌‌‌‌(pH، اسیدیته، ویسکوزیته، آب­اندازی و رنگ‌)، میکروبی (باکتری‌های اسید لاکتیک و مخمرها) و حسی‌‌ (بافت، طعم، بو و پذیرش­کلی) کفیر تهیه شده با شیر گاومیش طی پانزده روز نگهداری در یخچال بررسی شد. نتایج نشان داد که با افزایش میزان اینولین، مقادیر اسیدیته و ویسکوزیته نمونه­های کفیر طی مدت نگهداری افزایش یافت در حالی­که با افزایش مقدار اینولین، میزان آب­اندازی نمونه­ها در روز آخر نگهداری کاهش یافت. اینولین تعداد باکتری­های لاکتیک اسید در کفیر را افزایش داد که نشانه پری­بیوتیک بودن اینولین بود ولی بر رشد مخمرها بی­تاثیر بود. همچنین اینولین شدت روشنایی کفیر را کاهش داد. نتایج ارزیابی حسی نشان داد که اینولین میزان بو، طعم و بافت را کاهش داد و تأثیر منفی بر پذیرش­کلی نمونه­ها داشت. براساس یافته­های این تحقیق، علیرغم اینکه اینولین ویژگی­های پروبیوتیکی کفیر را افزایش داد ولی تأثیر منفی بر آب­اندازی و ویژگی­های حسی کفیر داشت.
کلیدواژه‌ها

موضوعات


عنوان مقاله English

Effect of inulin on physico-chemical, microbial and sensory properties of the kefir produced of buffalo milk

نویسندگان English

mehdi ghasab nezhad
mohammad hojjati
hossein jooyandeh
Department of Food Science and Technology, Agricultural Sciences and Natural Resources University of Khuzestan
چکیده English

Kefir is a fermented dairy drink that are produced using kefir grain and has beneficial effects on human health. In this study, the effects of the addition of Inulin (0.5, 1, 1.5%) on the physicochemical (pH, acidity, viscosity, syneresis and color), microbial (lactic acid bacteria and yeast) and organoleptic characteristics of kefir prepared with buffalo milk were investigated during 15 days refrigerator storage. The results showed that with increase of inulin content, the acidity and viscosity of kefir samples increased during storage period, while with increasing inulin content, the syneresis of the samples decreased on the last day of storage. Inulin also increased the number of lactic acid bacteria in kefir, indicating that the inulin was a prebiotic, but did not affect yeast growth. In addition, inulin reduced the lightness of kefir. Sensory evaluation results showed that inulin reduced the odor, taste and texture and had a negative effect on the overall acceptance of samples. According to the findings of this study, although inulin increased the probiotic properties of kefir, it had a negative effect on syneresis and sensory attributes of kefir.

کلیدواژه‌ها English

Fermentation
Dairy beverage
Probiotic
Kefir
Inulin
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