The discussion and conclusion of the paper are backed up by the results. For example, the researchers claim that the best labelling concentration that does not alter the viability of cells is attained at 27 micromoles of Gd3+, which corresponds to 98 percent of viable cells. Images of transmission emission microscopy, which are part of the results, confirm the uptake of the nanoparticles. The authors indicate that these findings agree with previous studies on the uptake of other nanoparticles. However, explicit comparisons cannot be made due to the variations in the preparation and dispensation of the nanoparticles. The authors also assert that gadonanotubes do not alter the properties of mesenchymal stem cells. This assertion is supported by the findings of the study, which show that the labelled stem cells can develop into various types of cells such as adipocytes, chondrocytes and osteocytes (Tran et al. 2010).

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