Analysis of moisture diffusion mechanism in structured lipids using magnetic resonance imaging

Paluri Sravanti; Shavezipur Mohammed; Heldman Dennis R.; Maleky Fatemeh

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Analysis of moisture diffusion mechanism in structured lipids using magnetic resonance imaging

机译：磁共振成像分析结构脂质中的水分扩散机理

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The mechanism of moisture migration from a high moisture gel-layer to an adjacent lipid layer was characterized. Three lipid samples: cocoa butter (CB), palm kernel oil (PO) and 20% (w/w) cocoa powder in palm kernel oil (CPPO) were prepared by two methods, shearing during crystallization and static crystallization. Using Magnetic Resonance Imaging, samples' moisture uptake at a storage temperature of 20 degrees C was measured for 91 days and their effective diffusivity values were calculated. It was found that shearing reduces effective diffusivity of moisture in samples, thereby increasing their moisture-barrier capacity compared to unprocessed lipid systems. The mechanism of moisture migration was found to be a combination of Fickian diffusion and relaxation of lipid matrix in the statically crystallized cocoa butter samples, whereas Fickian diffusion was the dominant mechanism in sheared cocoa butter samples. Palm kernel oil samples exhibited a combination of Fickian and relaxation mechanisms, regardless of the processing technique. Whereas the mixture of palm kernel oil and cocoa powder samples showed relaxation-mechanism controlled migration due to the presence of hydrophilic cocoa powder particles.

机译：特征在于，从高水分凝胶层到相邻脂质层的水分迁移机理。通过两种方法制备三种脂质样品：可可脂（CB），棕榈籽油（CPPO）中的棕榈籽油（CPPO）中的可可粉，在结晶期间剪切和静电结晶。使用磁共振成像，测量样品在20℃的储存温度下测量91天，并计算其有效扩散值。发现剪切减少了样品中水分的有效扩散性，从而增加了与未处理的脂质系统相比的防潮能力。发现水分迁移的机制是在静态结晶的可可脂样品中的Fickian扩散和脂质基质松弛的组合，而Fickian扩散是剪切可可脂样品中的主要机理。棕榈内核油样品表现出Fickian和弛豫机制的组合，无论加工技术如何。虽然棕榈籽油和可可粉样品的混合物显示出由于亲水性可可粉末颗粒的存在而放松机构控制的迁移。

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《RSC Advances》 |2015年第94期|共8页
作者
Paluri Sravanti; Shavezipur Mohammed; Heldman Dennis R.; Maleky Fatemeh;
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Ohio State Univ Dept Food Agr &

Biol Engn Columbus OH 43210 USA;

Ohio State Univ Dept Food Agr &

Biol Engn Columbus OH 43210 USA;

Ohio State Univ Dept Food Agr &

Biol Engn Columbus OH 43210 USA;

Ohio State Univ Dept Food Sci &

Technol Columbus OH 43210 USA;

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正文语种 eng
中图分类化学;
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1. Analysis of moisture diffusion mechanism in structured lipids using magnetic resonance imaging (vol 5, pg 76904, 2015) [J] . Paluri Sravanti, Shavezipur Mohammed, Heldman Dennis R., RSC Advances . 2017,第85期

机译：使用磁共振成像（Vol 5，PG 76904,2015使用型脂质水分扩散机理分析
2. Correction: Analysis of moisture diffusion mechanism in structured lipids using magnetic resonance imaging [J] . Sravanti Paluri, Mohammed Shavezipur, Dennis R. Heldman, RSC Advances . 2017,第85期

机译：校正：使用磁共振成像分析结构化脂质中的水分扩散机理
3. Analysis of moisture diffusion mechanism in structured lipids using magnetic resonance imaging [J] . Paluri Sravanti, Shavezipur Mohammed, Heldman Dennis R., RSC Advances . 2015,第94期

机译：磁共振成像分析结构脂质中的水分扩散机理
4. Computer-Based Image Analysis of Liver Steatosis with Large-Scale Microscopy Imagery and Correlation with Magnetic Resonance Imaging Lipid Analysis [C] . Kong Jun, Lee Michael J., Bagci Pelin, 2011 IEEE International Conference on Bioinformatics and Biomedicine . 2011

机译：基于计算机的肝脂肪变性图像的大型显微镜图像分析以及与磁共振成像血脂分析的相关性
5. Moisture Diffusion in Lipids using Magnetic Resonance Imaging [D] . Paluri, Sravanti. 2017

机译：使用磁共振成像脂质的水分扩散
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Analysis of moisture diffusion mechanism in structured lipids using magnetic resonance imaging

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