کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9487528 | 1330759 | 2005 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Non-invasive and non-destructive ultrasonic technique for the detection of microbial contamination in packed UHT milk
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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: Non-invasive and non-destructive ultrasonic technique for the detection of microbial contamination in packed UHT milk Non-invasive and non-destructive ultrasonic technique for the detection of microbial contamination in packed UHT milk](/preview/png/9487528.png)
چکیده انگلیسی
An eight-channel ultrasonic device was developed to detect microorganism growth in UHT milk contained in carton-like packages without opening the packs. The system analyses automatically the amplitude and the delay of an ultrasonic pulse passing through packed UHT processed milk, being the coupling between the transducers and the packs accomplished in dry conditions. Changes in these parameters produced by different microbes are detected even when other physical-chemical parameters still remain within the sterility margins. Three different strains (Bacillus cereus, Proteus vulgaris and Bacillus pumilus) were inoculated at different concentrations in UHT milk packs. Variations in the velocity and amplitude of the ultrasonic wave show the growth signature of these microorganisms. Growth detection was achieved between 7 and 48Â h depending on the number and type of bacteria inoculated. The experiments show that conventional analysis like pH or acidity measurements could be substituted by this non-invasive technique.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Research International - Volume 38, Issue 6, July 2005, Pages 631-638
Journal: Food Research International - Volume 38, Issue 6, July 2005, Pages 631-638
نویسندگان
L. Elvira, L. Sampedro, J. Matesanz, Y. Gómez-Ullate, P. Resa, J.R. Iglesias, F.J. EchevarrÃa, F. Montero de Espinosa,