Oil droplet size determination in complex flavor delivery systems by diffusion NMR spectroscopy

Fieber, Wolfgang; Hafner, Valeria; Normand, Valéry

doi:10.1016/j.jcis.2011.01.018

Cited by 18 publications

(14 citation statements)

References 34 publications

(56 reference statements)

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“…Modeling the restricted diffusion provides a way to quantitate the lipid droplet size by using diffusion NMR with a theory for emulsions (27,28). This approach has been utilized in vivo (25) and also in other studies involving oil-in-water emulsions (29,30). Because of the dependence of diffusion on droplet size, WAT, with large unilocular lipid droplets, can be expected to have different diffusion properties compared with BAT, with smaller multilocular lipid droplets.…”

Section: Nmr Data Acquisition and Analysismentioning

confidence: 99%

“…Assuming the rapid convergence of the Bessel function, a simplified expression shown in equation 2 was derived by Garasanin et al (29) and utilized for various applications (25,30): sequences, the reduced diffusion time is defined by  r =   /3  /2 (36). D is the translational diffusion coefficient that corresponds to the slope of a semilogarithmic intensity decay plot against b values.…”

Section: Droplet Size Distributionmentioning

confidence: 99%

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Differentiating brown and white adipose tissues by high-resolution diffusion NMR spectroscopy

Verma

Nagashima

Yaligar

et al. 2017

Journal of Lipid Research

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majority of body fat, which is utilized for energy storage, whereas BAT is a minor portion that is involved in thermogenesis, due to the presence of uncoupling protein 1 (UCP1) in the mitochondria. In addition to the differences in energy storage and expenditure, BAT is a highly heterogeneous, densely vascularized tissue with abundant oxygen, blood supply, and iron-rich mitochondria (6, 7). WAT is composed of unilocular lipid droplets, whereas BAT is composed of multilocular lipid droplets scattered throughout the cytoplasm and surrounded by mitochondria.Positron emission tomography (PET) has been the gold standard for imaging BAT (8, 9) because of a selective image contrast of activated BAT by the increased uptake of 18 F-deoxyglucose. However, PET is not suitable for longitudinal studies because it requires injection of exogenous radioactive tracers. Magnetic resonance (MR)-based methods are more promising for real-time and long-term observation of fat accumulation and consumption (10). Traditional MR-based approaches exploit the differences in the water content in WAT and BAT using chemical shift imaging or the Dixon technique (11-13). Imaging of water and fat permits quantitative assessment of the fat fraction. Additionally, the differences in iron content, perfusion, and vasculature have been exploited by T 2 and T 2 * relaxation techniques (14, 15). However, although WAT and BAT are manually separable by color and texture, they cannot be easily distinguished by MR because of the similarity in their magnetic and chemical characteristics (14,15).Applications of nontraditional MR methodologies for selectively detecting BAT have been attempted. Branca and Warren (16, 17) have studied focusing on intermolecular multiple-quantum coherences through dipolar Abstract There are two types of fat tissues, white adipose tissue (WAT) and brown adipose tissue (BAT), which essentially perform opposite functions in whole body energy metabolism. There is a large interest in identifying novel biophysical properties of WAT and BAT by a quantitative and easy-to-run technique. In this work, we used high-resolution pulsed field gradient diffusion NMR spectroscopy to study the apparent diffusion coefficient (ADC) of fat molecules in rat BAT and WAT samples. The ADC of fat in BAT and WAT from rats fed with a chow diet was compared with that of rats fed with a high-fat diet to monitor how the diffusion properties change due to obesity-associated parameters such as lipid droplet size, fatty acid chain length, and saturation. Feeding a high-fat diet resulted in increased saturation, increased chain lengths, and reduced ADC of fat in WAT. The ADC of fat was lower in BAT relative to WAT in rats fed both chow and high-fat diets. Diffusion of fat was restricted in BAT due to the presence of small multilocular lipid droplets. Our findings indicate that in vivo diffusion might be a potential way for better delineation of BAT and WAT in both lean and obese states.-Verma, S. K., K. Nagashima, J. Yaligar, N. Michael, S. S. Lee, T. Xianfeng, V...

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Section: Nmr Data Acquisition and Analysismentioning

confidence: 99%

Section: Droplet Size Distributionmentioning

confidence: 99%

Differentiating brown and white adipose tissues by high-resolution diffusion NMR spectroscopy

Verma

Nagashima

Yaligar

et al. 2017

Journal of Lipid Research

View full text Add to dashboard Cite

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“…0.02À700 Adamiec et al, 2012;Baranauskiené et al, 2006;Bhandari et al, 1992;Choi et al, 2009;Fieber et al, 2011;Finney et al, 2002;Kaasgaard and Keller, 2010;Kim and Morr, 1996;Ko et al, 2012;Li et al, 2013;Ma et al, 2013;McNamee et al, 1998;Paramita et al, 2012;Patel et al, 2013;Rodríguez et al, 2013;Shah et al, 2012;Soottitantawat et al, 2004Soottitantawat et al, , 2005Soottitantawat et al, , 2007Yang et al, 2012a,b;Zandi et al, 2014. Optical microscopy Accessibility, low cost, simple operation, color distinguishability ability.…”

Section: Scanning Electron Microscopy (Sem)mentioning

confidence: 99%

“…Shah et al (2012) produced SEM microstructure graphs of eugenol embedded in spray-dried microcapsules coated with whey protein isolate and maltodextrin-the active dispersion is shown in Figure 26.11c. Fieber et al (2011) prepared the glassy encapsulation system by incorporating natural orange oil into a sucroseÀmaltodextrin melt and characterized the extrudates by SEM. They observed that the oil droplets (which do not deviate significantly from being spherical) were dispersed in the solid matrix discretely and the droplet size distribution was multimodal (Figure 26.11e).…”

Section: Encapsulation Efficiencymentioning

confidence: 99%

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Testing Tools and Physical, Chemical, and Microbiological Characterization of Microencapsulated Systems

Moran

Yin

Cadwallader

et al. 2014

Microencapsulation in the Food Industry

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Low‐field NMR for quality control on oils

Rudszuck

Förster

Nirschl

et al. 2019

Magnetic Reson in Chemistry

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Oil is a prominent, but multifaceted material class with a wide variety of applications. Technical oils, crude oils as well as edibles are main subclasses. In this review, the question is addressed how low-field NMR can contribute in oil characterization as an analytical tool, mainly with respect to quality control. Prerequisite in the development of a quality control application, however, is a detailed understanding of the oils and of the measurement. Low-field NMR is known as a rich methodical toolbox that was and is explored and further developed to address questions about oils, their quality, and usability as raw materials, during production and formulation as well as in use.

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Oil droplet size determination in complex flavor delivery systems by diffusion NMR spectroscopy

Cited by 18 publications

References 34 publications

Differentiating brown and white adipose tissues by high-resolution diffusion NMR spectroscopy

Differentiating brown and white adipose tissues by high-resolution diffusion NMR spectroscopy

Testing Tools and Physical, Chemical, and Microbiological Characterization of Microencapsulated Systems

Low‐field NMR for quality control on oils

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