Specificity of hexarhenium cluster anions for synthesis of Mn-based nanoparticles with lamellar shape and pH-induced leaching for specific organ selectivity in MRI contrasting.

The present work demonstrates the structure variation of hexarhenium anionic cluster units [{ReS}(CN)(OH)] (n = 0, 2, 4) as the strategy to develop Mn-containing nanoparticles (NPs) exhibiting pH-dependent leaching. The dicyanotetrahydroxo complex [{ReS}(CN)(OH)] is the optimal for the synthesis of the Mn-based NPs with a lamellar shape exhibiting the pH-dependent aggregation and magnetic relaxation behavior. The pH-dependent behavior of the NPs derives from the easy protonation of the apical hydroxo ligands of [{ReS}(CN)(OH)] cluster, which triggers partial leaching of Mn ions and aggregation of the NPs driven by the surface neutralization.

Pheromone of grouped female mice impairs genome stability in male mice through stress-mediated pathways.

Population density is known to affect the health and survival of many species, and is especially important for social animals. In mice, living in crowded conditions results in the disruption of social interactions, chronic stress, and immune and reproductive suppression; however, the underlying mechanisms remain unclear. Here, we investigated the role of chemosignals in the regulation of mouse physiology and behavior in response to social crowding.

Body composition as an indicator of metabolic changes in mice obtained by in vitro fertilization.

To identify body systems subject to epigenetic transformation during in vitro fertilization (IVF), comparative morphological and functional studies were performed on sexually mature offspring of outbred CD1 mice, specific-pathogen-free (SPF), obtained by IVF (experiment) and natural conception (control). The studies included assessment of age-related changes in body weight and composition, energy intake and expenditure, and glucose homeostasis. To level the effects caused by the different number of newborns in the control and in the experiment, the size of the fed litters was halved in the control females.

Specific nanoarchitecture of silica nanoparticles codoped with the oppositely charged Mn and Ru complexes for dual paramagnetic-luminescent contrasting effects.

The silica nanoparticles (SNs) co-doped with paramagnetic ([Mn(HL)],) and luminescent ([Ru(dipy)]) complexes are represented. The specific distribution of [Mn(HL)] within the SNs allows to achieve about ten-fold enhancing in magnetic relaxivities in comparison with those of [Mn(HL)] in solutions. The leaching of [Mn(HL)] from the shell can be minimized through the co-doping of [Ru(dipy)] into the core of the SNs.

Particle-Based Imaging Tools Revealing Water Flows in Maize Nodal Vascular Plexus.

In plants, water flows are the major driving force behind growth and play a crucial role in the life cycle. To study hydrodynamics, methods based on tracking small particles inside water flows attend a special place. Thanks to these tools, it is possible to obtain information about the dynamics of the spatial distribution of the flux characteristics.