کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4562676 | 1330724 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Migration of α-tocopherol from LDPE films to corn oil and its effect on the oxidative stability
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش تغذیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The migration of α-tocopherol (α-T) from low density polyethylene (LDPE) films, added with 20 (film A) and 40 mg gâ1 (film B) to corn oil for 12 weeks at 5, 20 and 30 °C was determined. A LDPE film added with no α-T was used as control (film C). Diffusion coefficient (D) values for the film A system were 1.4 Ã 10â11, 7.1 Ã 10â11 and 30.3 Ã 10â11 cm2 sâ1 at 5, 20 and 30 °C, respectively. Meanwhile, D values for the film B system were 1.3 Ã 10â11, 9.6 Ã 10â11 and 51.1 Ã 10â11 cm2 sâ1 at the same temperatures. The activation energy (Ea) for the diffusion of α-T was 126.5 (film A) and 105.9 kJ molâ1 (film B). The effect of the migration of α-T on the oxidative stability of corn oil was evaluated by monitoring hexanal content by solid phase micro-extraction (SPME) and gas chromatography. The hexanal content in the oil showed that both films added with α-T resulted suitable to maintain the oxidative stability of the oil for about 16 weeks at 30 °C, compared to 12 weeks for the oil in contact with the film C.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Research International - Volume 43, Issue 4, May 2010, Pages 1073-1078
Journal: Food Research International - Volume 43, Issue 4, May 2010, Pages 1073-1078
نویسندگان
Abril Zoraida Graciano-Verdugo, Herlinda Soto-Valdez, Elizabeth Peralta, Pavlov Cruz-Zárate, Alma Rosa Islas-Rubio, Saúl Sánchez-Valdes, Armida Sánchez-Escalante, Natalia González-Méndez, Humberto González-RÃos,