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Development monitoring of aster-like nanoparticles (ALNs) in prokaryote-free medium. Temporal variations of ALNs abundances and ratios (in %) of different morphotypes over a 36-day period. Mean values from triplicate and standard errors are plotted. Significant differences between ALNs abundance at t (n) and t (0) and between ALNs abundance at t (n) and t (n-1) are indicated by symbols ¤ and 
, respectively (T-test, p < 0.05).
