Imaging of Oil/Monoglyceride Networks by Polarizing Near-Field Scanning Optical Microscopy |
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Authors: | Ellina Kesselman Eyal Shimoni |
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Institution: | (1) Faculty of Biotechnology and Food Engineering, Technion-Israel Institute of Technology, Haifa, 32000, Israel |
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Abstract: | Polarizing near-field scanning optical microscopy (NSOM) was applied for visualization of lipid coagel structures. The technique
ensures obtaining polarization contrast images at micro- and nanoscale resolution. Comparison to the polarizing light microscopy
images revealed that the same fractal structural organization persists also at submicron scale, at the level of primary ordered
structures creation. Many long birefringent needle-shaped primary crystallites were imaged in the corn oil:monoglyceride samples,
and lower amount of smaller oval-shaped primary crystallites—in the olive oil:monoglyceride samples. Unlike atomic force microscopy,
polarizing NSOM brought direct evidence on the physical state of specific features. Compared to the polarizing light microscopy,
polarizing NSOM provided additional information on the structural organization of oil–monoglyceride coagels at the micro-
and submicron scale. |
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Keywords: | Polarizing NSOM Lipid Coagel Oil Monoglyceride Microscopy |
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