بررسی اثر ریزپوشانی با آلژینات سوکسینیله شده بر زنده‌مانی لاکتوباسیلوس اسیدوفیلوس و ویژگی‌های کیفی و حسی ماست حاوی آن طی دوره نگه‌داری

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری تخصصی بهداشت مواد غذایی، دانشکده دامپزشکی، دانشگاه شیراز، شیراز، ایران

2 استاد بهداشت مواد غذایی، دانشکده دامپزشکی، دانشگاه شیراز، شیراز، ایران

3 دانشیار بهداشت مواد غذایی، دانشکده دامپزشکی، دانشگاه شیراز، شیراز، ایران

چکیده

استفاده از تکنیک ریزپوشانی می‌تواند منجر به افزایش قابلیت زنده‌مانی پروبیوتیک­ها در فرآورده‌های لبنی طی دوره نگه­داری گردد. یکی از

 

راهکارهای پیشنهاد شده برای بهبود توانایی حفاظتی آلژینات مورد استفاده در ریزپوشانی، اصلاح شیمیایی آن است. در این پژوهش تأثیر سوکسینیله کردن آلژینات و کاربرد آن به‌عنوان ماده ریزپوشانی کننده در تهیه ریزپوشینه‌های لاکتوباسیلوس اسیدوفیلوس

 
بر ویژگی‌های کیفی (pH، اسیدیته، آب اندازی و ظرفیت نگهداری آب)، خصوصیات حسی و قابلیت زنده‌مانی این باکتری در ماست طی 21 روز نگهداری در دمای 4 درجه سلسیوس مورد ارزیابی قرار گرفت. بدین منظور چهار نمونه ماست شامل ماست فاقد لاکتویاسیلوس اسیدوفیلوس، ماست حاوی لاکتویاسیلوس اسیدوفیلوس آزاد، ماست حاوی لاکتوباسیلوس اسیدوفیلوس ریزپوشانی شده با آلژینات طبیعی و ماست حاوی لاکتوباسیلوس اسیدوفیلوس ریزپوشانی شده با آلژینات سوکسینیله شده تهیه گردید. نتایج آزمون‌های کیفی نشان داد که اسیدیته و آب­اندازی ماست حاوی ریزپوشینه‌های آلژینات سوکسینیله شده در مقایسه با سایر نمونه‌ها کمتر و در مقابل pH و ظرفیت نگه­داری آب آن نسبت به دیگر نمونه‌ها بیشتر بود. هم­چنین نتایج حاصل از آزمون شمارش میکروبی و ارزیابی حسی نشان داد که ریزپوشانی لاکتوباسیلوس اسیدوفیلوس با استفاده از آلژینات سوکسینیله شده به­طور معنی‌داری منجر به افزایش زنده‌مانی آن طی دوره نگه­داری ماست گردید (05/0>p) بدون آن­که اثر منفی معنی‌داری بر ویژگی­های حسی ماست داشته باشد، لذا می‌توان ریزپوشانی با آلژینات سوکسینیله شده را به‌عنوان روشی موثر برای بهبود زنده‌مانی پروبیوتیک­ها در ماست پیشنهاد  نمود.



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تازه های تحقیق

 

 

کلیدواژه‌ها


عنوان مقاله [English]

The effect of microencapsulation with succinylated alginate on the viability of Lactobacillus acidophilus and the qualitative and sensory properties of yogurt during the storage

نویسندگان [English]

  • M. Forouzantabar 1
  • S. Hosseinzadeh 2
  • H. R. Gheisari 3
  • S. S. Shekarforoush 2
1 Ph.D. student of Food Hygiene, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
2 Professor of Food Hygiene, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
3 Associate Professor of Food Hygiene, School of Veterinary Medicine, Shiraz University, Shiraz, Iran
چکیده [English]

The use of the microencapsulation technique can lead to an increase in the survival of probiotics in dairy products during storage. Chemical modification is one of the proposed strategies to improve the protective ability of alginate used in microencapsulation. In the current work, the effect of succinylated alginate and its application as a micro-coating on the preparation of Lactobacillus acidophilus microcapsules was evaluated on the qualitative properties (pH, acidity, syneresis, and water holding capacity), sensory properties, and survival of this bacteria in yogurt during 21 days of storage at 4°C. For this purpose, four samples of yogurt including yogurt without L. acidophilus, yogurt containing free L. acidophilus, yogurt containing microencapsulated L. acidophilus with native alginate, and yogurt containing microencapsulated L. acidophilus with succinylated alginate, was prepared. The results of qualitative tests showed that the acidity and syneresis of yogurt containing succinylated alginate microcapsules were lower while the pH and water holding capacity were higher than the other experimental groups. Also, the results of microbial counting and sensory evaluation showed that the microencapsulation of L. acidophilus using succinylated alginate was significantly increased its survival during the storage time (p < /em><0.05) without any adverse effects on the sensory properties. Therefore, microencapsulation with succinylated alginate can be suggested as an effective approach to improve the survival of probiotics in yogurt.
 



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کلیدواژه‌ها [English]

  • Lactobacillus acidophilus
  • Microencapsulation
  • Succinylated alginate
  • Probiotic yogurt

 

 

 

 

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