کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9912195 | 1549448 | 2005 | 14 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of cooling temperature and duration on cold adaptation of Lactobacillus acidophilus RD758
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم کشاورزی و بیولوژیک (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of cooling temperature and duration on cold adaptation of Lactobacillus acidophilus RD758 Influence of cooling temperature and duration on cold adaptation of Lactobacillus acidophilus RD758](/preview/png/9912195.png)
چکیده انگلیسی
The effect of different cooling temperatures and durations on resistance to freezing and to frozen storage at â20 °C in Lactobacillus acidophilus RD758 was studied, by using a central composite rotatable design. A cold adaptation was observed when the cells were maintained at moderate temperature (26 °C) for a long time (8 h) before being cooled to the final temperature of 15 °C. These conditions led to a low rate of loss in acidification activity during frozen storage (0.64 min dayâ1) and a high residual acidification activity after 180 days of frozen storage (1011 min). The experimental design allowed us to determine optimal cooling conditions, which were established at 28 °C during 8 h. Adaptation to cold temperatures was related to an increase in the unsaturated to saturated fatty acid ratio and in the relative cycC19:0 fatty acid concentration. Moreover, an increased synthesis of four specific proteins was observed as an adaptive response to the optimal cooling conditions. They included the stress protein ATP-dependent ClpP and two cold induced proteins: pyruvate kinase and a putative glycoprotein endopeptidase.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Cryobiology - Volume 50, Issue 3, June 2005, Pages 294-307
Journal: Cryobiology - Volume 50, Issue 3, June 2005, Pages 294-307
نویسندگان
Yu Wang, Jérôme Delettre, Alain Guillot, Georges Corrieu, Catherine Béal,