Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Jun 17;11:301. doi: 10.1186/s11671-016-1517-3

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s). 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

PMC Copyright notice

Fig. 3 — Scanning electron microscopy of NRPE in different freeze-drying conditions. a, b Method A of drying at room temperature in freeze-drying (NRPE A2). c, d Method B of drying in freeze-drying (NRPE A21). e, f Method C of drying in freeze-drying using cryoprotectants: colloidal silicon dioxide e and sodium starch glycolate f of the NRPE A4 composition