کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
2087439 1080644 2007 4 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ascospore inactivation and germination by high pressure processing is affected by ascospore age
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
پیش نمایش صفحه اول مقاله
Ascospore inactivation and germination by high pressure processing is affected by ascospore age
چکیده انگلیسی

The effects of age on high pressure resistance of the ascospores of heat resistant moulds Byssochlamys fulva, B. nivea, Neosartorya fischeri and N. spinosa were determined. Ascospores were harvested from cultures grown for 3–15 weeks at 30 °C on malt extract agar. Following filtration and determination of concentration, the ascospores were subjected to high pressure processing (HPP) at 600 MPa for 10 min in 0.1 M citrate phosphate buffer (pH 4 and 6) and mango puree (pH 5). The results supported our hypothesis that age (maturity) affects high pressure resistance of ascospores of heat resistant moulds. A reduction of log10 2.5 cfu mL− 1 was achieved for three week old ascospores of B. nivea whereas for nine week old ascospores only a half log reduction was achieved. Similar results were observed for B. nivea and N. fischeri. The HPP treatment caused activation of ascospores of N. spinosa, with older ascospores showing increased activation.Industrial relevanceThe observation of activation of some ascospores by HPP, indicates that HPP alone is insufficient for elimination of these problematic spoilage microorganisms. HPP would need to be combined with other hurdles in order to produce high quality pressure-treated shelf-stable fruit products.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Innovative Food Science & Emerging Technologies - Volume 8, Issue 4, December 2007, Pages 531–534
نویسندگان
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