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Over the past few years, many papers have been published on the nanomedical applications of magnetic nanoparticles. However, most studies lack important information about the in vivo behavior of these nanoparticles, which is a critical aspect for their rational design. In this chapter we describe a simple protocol for the in vivo characterization of the pharmacokinetics of magnetic nanoparticles intravenously injected in mice, using basic MRI sequences.

The unprecedented bimetallic 2D coordination polymer {Fe[(Hg(SCN)3 )2 ](4,4'-bipy)2 }n exhibits a thermal high-spin (HS)↔low-spin (LS) staircase-like conversion characterized by a multi-step dependence of the HS molar fraction γHS . Between the fully HS (γHS =1) and LS (γHS =0) phases, two steps associated with different ordering appear in terms of spin-state concentration waves (SSCW). On the γHS ≈0.5 step, a periodic SSCW forms with a HS-LS-HS-LS sequence. On the γHS ≈0.34 step, the 4D superspace crystallography structural refinement reveals an aperiodic SSCW, with a HS-LS sequence incommensurate with the molecular lattice. The formation of these different long-range spatially ordered structures of LS and HS states during the multi-step spin-crossover is discussed within the framework of "Devil's staircase"-type transitions. Spatially modulated phases are known in various types of materials but are uniquely related to molecular HS/LS bistability in this case., (© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.)

A good way to promote breastfeeding is to implement the Ten Steps to Successful Breastfeeding of UNICEF. However, this is not an easy task and there are many difficulties prior to success. Based on our experience on the subject, supported by our recent accreditation as a Baby-friendly hospital, we have analyzed various doubts and problems that we think are important in order to enhance breastfeeding in a hospital setting: how to begin, how to train the health personnel and keep them updated, when and how to supplement breastfeeding, how to promote the activity of support groups, how to improve the support to the mother after discharge, how much time may be necessary, etc. Furthermore, we comment on factors that we consider important and that may be essential for success., (Copyright © 2008 Sociedad Española de Calidad Asistencial. Published by Elsevier Espana. All rights reserved.)