Research Article

An Approach to Tentative Reference Levels Setting for Nanoparticles in the Workroom Air Based on Comparing Their Toxicity with That of Their Micrometric Counterparts: A Case Study of Iron Oxide Fe3O4

Figure 4

Engulfment of 10 nm magnetite particles by an AM (phagosomes, arrows 1). TEM, magnification 140000.
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