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. 2015 Aug 11;3:42. doi: 10.3389/fchem.2015.00042

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Copyright © 2015 Ashraf, Khan, Ahmad and Sarfraz.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Optical and SEM micrographs of emulsified acid-base catalyzed silica microspheres. The optical (original magnification: 60 ×) and SEM (original magnification 600 ×) images. (A) Show the appearance of microspheres in the size range of 10–40 μm in diameter. (B) Show the appearance of microspheres in the size range of 100–300 μm in diameter.