کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9486897 | 1330531 | 2005 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Response of Saccharomyces cerevisiae to the combined action of ultrasound and low weight chitosan
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش تغذیه
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Response of Saccharomyces cerevisiae to the combined action of ultrasound and low weight chitosan Response of Saccharomyces cerevisiae to the combined action of ultrasound and low weight chitosan](/preview/png/9486897.png)
چکیده انگلیسی
The resistance of Saccharomyces cerevisiae to the action of ultrasound (600 W, 20 kHz, 95.2 μm wave amplitude) at 45 °C in Sabouraud broth (pH 5.6) containing 1000 ppm low weight chitosan was analyzed. Preincubation of the inoculated systems 30 and 90 min prior to sonication was also evaluated. Addition of chitosan enhanced the inactivation by ultrasound. Incubating the yeast with chitosan prior to sonication increased the inactivation. After 30 min of exposure to chitosan, approximately 1-log cycle reduction of the yeast was obtained leading to a final reduction of more than three log cycles after 30 min of the ultrasonic treatment. Ninety minutes of exposure to chitosan resulted in little significant change in yeast reduction. Transmission electron microphotographs of the cells showed possible different action mechanisms of chitosan depending on whether systems were preincubated or not. Experimental data were modeled by using the modified Gompertz equation and Weibull distribution of resistances.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Control - Volume 16, Issue 2, February 2005, Pages 131-139
Journal: Food Control - Volume 16, Issue 2, February 2005, Pages 131-139
نویسندگان
Sandra Guerrero, Mariana Tognon, Stella Maris Alzamora,