کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10375846 | 880342 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of environmental stresses on stability of O/W emulsions containing droplets stabilized by multilayered membranes produced by a layer-by-layer electrostatic deposition technique
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
شیمی کلوئیدی و سطحی
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چکیده انگلیسی
A three step process, based on electrostatic layer-by-layer deposition, was used to produce oil-in-water emulsions containing submicron (d32â0.3 μm) oil droplets stabilized by sodium dodecyl sulfate (SDS)-chitosan-pectin membranes (100 mM acetic acid, pH 3.0). First, primary emulsions (5 wt% corn oil, 5 mM SDS) containing anionic droplets (ζââ60 mV) stabilized by SDS membranes were prepared using a high-pressure value homogenizer. Second, secondary emulsions (1 wt% corn oil, 1 mM SDS, 0.024 wt% chitosan) containing cationic droplets (ζâ+59 mV) stabilized by SDS-chitosan membranes were formed by diluting the primary emulsion with aqueous chitosan solution and agitating to disrupt any flocs. Third, tertiary emulsions (0.2 wt% corn oil, 0.2 mM SDS, 0.0048 wt% chitosan, 0.040 wt% pectin) containing anionic droplets (ζââ14 mV) stabilized by SDS-chitosan-pectin membranes were formed by diluting the secondary emulsion with aqueous pectin solution. The stability of primary, secondary and tertiary emulsions to pH, ionic strength, thermal processing and freeze-thaw cycling were determined. The droplets in tertiary emulsions had good stability to droplet aggregation over a wide range of pH values (pH 3.0-8.0), NaCl concentrations (â¤500 mM NaCl), thermal treatments (30-90 °C for 20 min) and freeze-thaw cycling (â20 °C for 22 h/30 °C for 2 h). The interfacial engineering technology utilized in this study could lead to the creation of food emulsions with improved stability to environmental stresses.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Hydrocolloids - Volume 19, Issue 2, March 2005, Pages 209-220
Journal: Food Hydrocolloids - Volume 19, Issue 2, March 2005, Pages 209-220
نویسندگان
Tomoko Aoki, Eric A. Decker, D.Julian McClements,