تأثیر شرایط فرآوری بر بازده استخراج و نقطه ذوب ژلاتین پوست کوسه چانه سفید (Carcharhinus dussumieri)

مجله پژوهشهای علوم و صنایع غذایی ایران

مقاله 4، دوره 8، شماره 2 - شماره پیاپی 20، تیر 1391   

نوع مقاله: مقاله پژوهشی

شناسه دیجیتال (DOI): 10.22067/ifstrj.v8i2.17273

نویسندگان

مسعود رضائی¹؛ علی معتمدزادگان²

¹دانشگاه تربیت مدرس

²دانشگاه علوم کشاورزی و منابع طبیعی ساری

چکیده

به منظور بهینه‌سازی شرایط استخراج ژلاتین از پوست کوسه چانه سفید (Carcharhinus dussumieri)، تأثیر غلظت سود (1 -01/0 نرمال)، غلظت اسیدکلریدریک (1 – 01/0 نرمال) و زمان استخراج (8- 3 ساعت)، بر بازده استخراج و نقطه ذوب ژلاتین با استفاده از طرح مرکب مرکزی به روش سطح پاسخ (RSM) مورد بررسی قرار گرفت. بر اساس مدل‌های رگرسیونی به‌دست آمده، مقادیر پیش‌بینی شده در شرایط بهینه شامل 222/23 درصد (بازده استخراج) و°C 224/32 (نقطه ذوب) بوده اند. شرایط اپتیمم با استفاده از سود 01/0 نرمال، اسید کلریدریک 135/0 نرمال و مدت زمان استخراج 3 ساعت به‌دست آمد. نتایج نشان داد که غلظت اسید کلریدریک و غلظت سود به شکل معنی‌داری بر بازده استخراج و نقطه ذوب ژلاتین حاصل، اثر داشت (p≤0/05)، ولی مدت زمان استخراج تأثیر معنی‌داری بر هیچ یک از دو ویژگی مورد بررسی نداشت.

کلیدواژه‌ها

کوسه چانه سفید؛ ژلاتین؛ روش سطح پاسخ؛ بازده استخراج و نقطه ذوب

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