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Direct Imaging of Sodium Stearate Crystals Dispersed in Waterpropylene Glycol Mixtures by Cryo-Electron Microscopy

Published online by Cambridge University Press:  02 July 2020

Yue Ma ,
J. Liang ,
Y. Zheng ,
S. L. Erlandsen ,
L. E. Scriven  and
H. T. Davis
Yue Ma
Affiliation:
Department of Chemical Engineering & Materials Science, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
J. Liang
Affiliation:
Department of Chemical Engineering & Materials Science, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
Y. Zheng
Affiliation:
Department of Chemical Engineering & Materials Science, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
S. L. Erlandsen
Affiliation:
Department of Genetics, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
L. E. Scriven
Affiliation:
Department of Chemical Engineering & Materials Science, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
H. T. Davis
Affiliation:
Department of Chemical Engineering & Materials Science, Cell Biology and Development, University of Minnesota, Minneapolis, MN, 55455, USA
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Abstract

Cryo-scanning electron microscopy (cryo-SEM) and cryo-transmission electron microscopy (cryo- TEM), in conjunctions with rheological measurements, light and confocal microscopy, x-ray scattering, and solid state NMR, are used to characterize sodium stearate (NaSt) crystals dispersed in waterpropylene glycol (PG) mixtures at macroscopic, microscopic, molecular, and atomic levels. NaSt is a surface-active, structural agent in household and personal cleaning products, including deodorant sticks and soap bars. A better structural characterization of NaSt/PG/water systems has practical importance in personal care and cosmetic industries. NaSt crystals and other soap crystal morphologies have been studied by the TEM/replica technique. However, the replicas were made of the residue after the original sample or its aqueous dilution were dried, and the original structure may have been lost during drying. Cryo-SEM was not used to study NaSt crystals because of its lower resolution and because the crystals are highly susceptible to radiation damage by electron beam.

Type
Cryoimmobilization, Freeze Substitution and Cryoem (Organized by S. Erlandsen)
Information
Microscopy and Microanalysis , Volume 7 , Issue S2: Proceedings: Microscopy & Microanalysis 2001, Microscopy Society of America 59th Annual Meeting, Microbeam Analysis Society 35th Annual Meeting, Long Beach, California August 5-9, 2001 , August 2001 , pp. 734 - 735
Copyright
Copyright © Microscopy Society of America 2001

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References

1.Liang, J., Ma, Y., Zheng, Y., Chang, H.-T., Binder, D., Abbas, S., Hsu, F.-L., and Davis, H. T., (2000) submitted to LangmuirGoogle Scholar