کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7592158 | 1492112 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Assessment of the action spectrum for photooxidation in full fat bovine milk
ترجمه فارسی عنوان
ارزیابی طیف عمل برای عکس اکسیداسیون در شیر کامل چربی شیر
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کلمات کلیدی
طیف عمل، عکس اکسیداسیون، شیر گاو، تجزیه و تحلیل احساسی، فتوسنتززرها،
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی
The action spectrum for photooxidation in full fat bovine milk was measured. Samples of milk with air or argon in headspace were exposed to narrow wavelength bands of light in the range 400-700Â nm. Photooxidation in terms of off-flavors was measured by a sensory panel, volatile compounds by headspace solid phase micro extraction (SPME-GC-MS), and photobleaching of photosensitizers in milk (riboflavin, protoporphyrin IX and a chlorophyllic compound) by front face fluorescence spectroscopy. The action spectrum deviated significantly from the absorption spectrum of milk. Significant oxidation was induced by wavelengths around 400Â nm and 500-650Â nm in milk with air in headspace. Argon in headspace gave significant oxidation also at 700Â nm. It is suggested that protoporphyrin IX and chlorophyll are responsible for oxidation induced by wavelengths >500Â nm, and that also riboflavin is contributing from 400 to 500Â nm.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 179, 15 July 2015, Pages 68-75
Journal: Food Chemistry - Volume 179, 15 July 2015, Pages 68-75
نویسندگان
Jens Petter Wold, Josefine Skaret, Trine Kastrup Dalsgaard,