کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5768405 1413222 2017 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The influence of edible coatings, blanching and ultrasound treatments on quality attributes and shelf-life of vacuum packaged potato strips
ترجمه فارسی عنوان
تأثیر پوشش های خوراکی، درمان های بلانچینگ و سونوگرافی بر ویژگی های کیفیت و مدت زمان نگهداری سیب زمینی بسته بندی شده بسته بندی شده
کلمات کلیدی
آلژینات، سیب زمینی سرخ کرده، آکریلامید، بار میکروبی، بافت،
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم کشاورزی و بیولوژیک دانش تغذیه
چکیده انگلیسی


- Ultrasound and citric acid 20 g.L−1 reduced microbial load of potato strips.
- Sodium alginate 20 g.L−1 increased browning and microbial counts.
- Blanching inhibited the PPO activity but had negative effects on texture.
- None of the treatments decreased oil adsorption and acrylamide content.

The aim of this work was to investigate the effect of using ultrasound or edible coating as a possible alternative to blanching on the quality of vacuum-packaged potato strips. The treatments assessed were blanching (85 °C, 3.5 min), coating with 20 g L−1 alginate and sonicating (40 kHz, 5 min) in an ultrasonic bath containing a 20 g L−1 citric acid solution. Vacuum-packaged samples were stored up to 12 days at 3 ± 1 °C. The pH, polyphenol oxidase (PPO) activity, sugars and microbial load were assessed. Also, the colour, shear-force and dry matter of the treated and fried potato strips as well as the oil adsorption and acrylamide after frying were evaluated. The PPO activity of the treated samples was not significantly different over time (p > 0.05). The treatments applied did not affect the attributes of the fried potato strips over time; there were no significant changes in oil absorption, acrylamide content or colour (p > 0.05). However, the visual quality of sonicated packaged potato strips was significantly better than that of the other treatments after storage. The loss of the texture of blanched potatoes was remarkable (p < 0.05) before and after frying. Sonicated samples maintained mesophilic bacteria counts better than blanched and alginate coated vacuum-packaged potato strips.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: LWT - Food Science and Technology - Volume 85, Part B, November 2017, Pages 449-455
نویسندگان
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