مقایسه ویژگی‌های تکنولوژیکی جدایه های حاصل از ماست سنتی خراسان با آغازگر تجاری در تولید ماست

مجله پژوهشهای علوم و صنایع غذایی ایران

مقاله 5، دوره 17، شماره 4 - شماره پیاپی 70، مهر و آبان 1400، صفحه 485-500   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/ifstrj.v17i4.86655

نویسندگان

فاطمه برمک¹؛ محمدباقر حبیبی نجفی^{* 1}؛ رضا حاجی محمدی فریمانی²؛ محمد رضا عدالتیان دوم¹

¹گروه علوم و صنایع غذایی، دانشکده کشاورزی، دانشگاه فردوسی مشهد، مشهد، ایران.

²گروه علوم و مهندسی صنایع غذایی، دانشگاه شهید باهنر کرمان، کرمان، ایران.

چکیده

یکی از مهم‌ترین موارد در تولید ماست انتخاب آغازگر مناسب می‌باشد. جدایه‌های بومی هرکشوری جزء ذخایر ژنتیکی آن کشور محسوب می‌شوند که نقش عمده‌ای در تولید و ایجاد خواص ارگانولپتیکی محصولات تخمیری ایفا می‌کنند. بنابراین مطالعه در زمینه کاربرد صنعتی جدایه‌های بومی ضروری به‌نظر می‌رسد. هدف از این پژوهش تعیین خصوصیات رئولوژیکی، حسی و فیزیکوشیمیایی ماست تولیدشده توسط آغازگرهای بومی جداشده از نمونه‌های ماست سنتی منطقه خراسان و مقایسه آن‌ها با ماست تولیدشده توسط آغازگر تجاری بود که با استفاده از 6 سویه استرپتوکوکوس سالواریوس زیرگونه ترموفیلوس استفاده از 6 سویه و 3 سویه لاکتوباسیلوس دلبروکی زیرگونه بولگاریکوس 18 نمونه ماست حاصل از شیر گاو در قالب آزمون فاکتوریل به‌صورت طرح کاملاً تصادفی در سه تکرار تولید شد و نمونه‌های تولیدی از نظر خصوصیات فیزیکوشیمیایی، رئولوژیکی و حسی موردآنالیز قرار گرفتند، سپس با ماست تولیدشده توسط آغازگر تجاری مقایسه شدند و با توجه به نتایج حاصله (اسیدیته، pH، درصد آب‌اندازی، زمان تخمیر، ویژگی‌های بافتی و ویژگی‌های حسی)، به انتخاب نمونه‌های ماست برتر در مقایسه با سایر نمونه‌ها و ماست تجاری اقدام شد و درنهایت با توجه به رفتار پروتئولیتیک سویه‌های لاکتوباسیلوس دلبروکی زیرگونه بولگاریکوس و سرعت تولید اسید توسط سویه‌های استرپتوکوکوس ترموفیلوس و همچنین تولید گاما آمینوبوتیریک اسید توسط سویه‌های مذکور، 5 نمونه ماست تولیدشده با استفاده از ترکیب آغازگرهای بومی با کدهای S₁b_{1 ،} S₂b₂S₅b_{1، ،}S₆b_{2 ،}S₄b₂ انتخاب شدند که ترکیب‌های نام‌برده جهت تولید ماست فراسودمند در صنعت پیشنهاد گردید.

کلیدواژه‌ها

آب‌اندازی؛ اسیدیته؛ آغازگرهای بومی؛ ماست؛ ویژگی‌های بافتی

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