کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
9441930 1301600 2005 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Impact of preservation and different packaging conditions on the microbial community and activity of Kefir grains
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Impact of preservation and different packaging conditions on the microbial community and activity of Kefir grains
چکیده انگلیسی
Kefir is a cultured milk product that is produced by a mixed acidic and alcoholic fermentation by microbes found within Kefir grains. The aim of this study was to evaluate three different packaging materials in their ability to retain the viability and activity of the grains over an extended storage period. The impact of the different packaging and storage conditions on the microbial community of the grains was also determined. Kefir grains were lyophilized, packaged in three different packaging materials, including low-density polyethylene film (LDPE), oriented polyester film (OPET), and methallized oriented polyester film (MOPET) and stored for 3 months at room temperature. Activity tests, including pH, titratable acidity (%TA), lactose and lactic acid content over a 10 and 18 h fermentation period were used to evaluate the acidification activity of the lyophilized grains. Selective media, morphology and physiological characteristics were used to obtain the enumeration values and to identify the microbes present in the packaged and stored grains. Overall, the best retention of the fermentation activity was found for the MOPET film. The OPET packaging film provided the best preservation of the microbial composition.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Microbiology - Volume 22, Issue 4, August 2005, Pages 337-344
نویسندگان
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