Bioinspired Cyclic Dipeptide Functionalized Nanofibers for Thermal Sensing and Energy Harvesting.

Nanostructured dipeptide self-assemblies exhibiting quantum confinement are of great interest due to their potential applications in the field of materials science as optoelectronic materials for energy harvesting devices. Cyclic dipeptides are an emerging outstanding group of ring-shaped dipeptides, which, because of multiple interactions, self-assemble in supramolecular structures with different morphologies showing quantum confinement and photoluminescence. Chiral cyclic dipeptides may also display piezoelectricity and pyroelectricity properties with potential applications in new sources of nano energy. Among those, aromatic cyclo-dipeptides containing the amino acid tryptophan are wide-band gap semiconductors displaying the high mechanical rigidity, photoluminescence and piezoelectric properties to be used in power generation. In this work, we report the fabrication of hybrid systems based on chiral cyclo-dipeptide L-Tryptophan-L-Tryptophan incorporated into biopolymer electrospun fibers. The micro/nanofibers contain self-assembled nano-spheres embedded into the polymer matrix, are wide-band gap semiconductors with 4.0 eV band gap energy, and display blue photoluminescence as well as relevant piezoelectric and pyroelectric properties with coefficients as high as 57 CN-1 and 35×10-6 Cm-2K-1, respectively. Therefore, the fabricated hybrid mats are promising systems for future thermal sensing and energy harvesting applications.

Jealousy, Gender, and Culture of Honor: A Study in Portugal and Brazil.

The purpose of this study was to examine whether gender and culture of honor were associated with the type of infidelity (sexual or emotional) that affected our subjects more. Samples of 192 Portuguese university students (119 women and 73 men) and 415 Brazilian university students (214 men and 201 women) participated in this research. Participants responded to six dilemmas reflecting a type of infidelity (sexual or emotional), a gender scale, and a culture of honor scale. The results of both samples are compatible with the cultural theses about jealousy. Both men and women were more affected by emotional infidelity. In addition, it was found that the relationship between the sex of the participants and the type of infidelity that induced stress in them was affected by sociocultural variables, such as culture of honor, masculinity, and femininity. Some differences in the response patterns in the case of an infidelity, in both samples (Portuguese and Brazilian), are shown and discussed.