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ارزیابی سینتیک رشد و بقاء لاکتوباسیلوس دلبروکی و لاکتوباسیلوس پاراکازئی با به کارگیری سوبسترای جو و مالت و تأثیر آنها بر خصوصیات آنتیاکسیدانی محیط | ||
مهندسی بیوسیستم ایران | ||
مقاله 3، دوره 48، شماره 2، مرداد 1396، صفحه 211-220 اصل مقاله (888.06 K) | ||
نوع مقاله: مقاله پژوهشی | ||
شناسه دیجیتال (DOI): 10.22059/ijbse.2017.62463 | ||
نویسندگان | ||
مهدیه سالاری1؛ سید هادی رضوی* 2 | ||
1دانشجوی دکترا دانشگاه تبریز | ||
2دانشگاه تهران | ||
چکیده | ||
در این مطالعه پتانسیل محیطهای جو، جو-مالت و مالت برای رشد و زندهمانی دو گونه لاکتوباسیلوس (لاکتوباسیلوس دلبروکی، لاکتوباسیلوس پاراکازئی) جهت تولید نوشیدنی فراسودمند بررسی شد. سپس تأثیر فرایند تخمیر بر فعالیت آنتیاکسیدانی و محتوای فنول کل سه محیط ارزیابی شده و با همتایان غیر تخمیری خود مقایسه گردید. نتایج نشان داد باکتریهای انتخابی بهخوبی در سه محیط رشد کرده به طوری که طی 10 ساعت اول تخمیر pH محیطها تا حدود 25/4 کاهش یافت. بالاترین جمعیت میکروبی (log CFU/ml 7/9) در محیط مالت به دست آمد. محتوای فنول کل و فعالیت آنتیاکسیدانی محیطها طی تخمیر به طور قابل توجهی افزایش یافته و محیط مالت تخمیر شده توسط لاکتوباسیلوس پاراکازئی بالاترین میزان فنول کل (96/83 میلی گرم معادل گالیک اسید در 100 میلیلیتر) و فعالیت ضد رادیکالی (ml 26/0= IC50) نشان داد. بهعلاوه بیشترین زندهمانی (CFU/ml 106×2/1) در محیط مالت تخمیر شده با لاکتوباسیلوس دلبروکی ثبت شد. | ||
کلیدواژهها | ||
جو؛ مالت؛ تخمیر؛ لاکتوباسیلوس؛ فعالیت آنتیاکسیدانی | ||
مراجع | ||
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