La antropología de Pedro Laín Entralgo, y su aplicación a la enfermería

Introduction. Current times are distinguished, among other things, by the instability of the events, facts and ideas that follow one another vertiginously. The circumstances that surround our society are extremely changing, as well as the way of understanding things and assessing recent developments. The material world dominates over human life. Productive tasks take first place. Appearances are unstable and the ephemeral confirms its power in the 21st century’s mentality. We are immersed in the aesthetics of seduction and image. And in human life, the expansion of needs in all walks of life has become part of the structure of human beings’ existence in the current world. The consumerist fever, the euphoria for new things have made the sense of life virtually insubstantial. All this hardly fits into the nature of healthcare professions. In our case, nursing science has scarce support in our society for continuing the research about the meaning of being a nurse that the reality of the profession requires...

Diketonylpyridinium cations as a support of new ionic liquid crystals and ion-conductive materials: analysis of counter-ion effects

Ionic liquid crystals (ILCs) allow the combination of the high ionic conductivity of ionic liquids (ILs) with the supramolecular organization of liquid crystals (LCs). ILCs salts were obtained by the assembly of long-chained diketonylpyridinium cations of the type [HOO^(R(n)pyH)] + and BF_(4)^(-) , ReO_(4)^(-), NO_(3)^(-), CF_(3)SO_(3)^(-), CuCl_(4)^(2-) counter-ions. We have studied the thermal behavior of five series of compounds by differential scanning calorimetry (DSC) and hot stage polarized light optical microscopy (POM). All materials show thermotropic mesomorphism as well as crystalline polymorphism. X-ray diffraction of the [HOO^(R(12)pyH)][ReO_(4)] crystal reveals a layered structure with alternating polar and apolar sublayers. The mesophases also exhibit a lamellar arrangement detected by variable temperature powder X-ray diffraction. The CuCl_(4)^(2-) salts exhibit the best LC properties followed by the ReO_(4)^(-) ones due to low melting temperature and wide range of existence. The conductivity was probed for the mesophases in one species each from the ReO_(4)^(-) , and CuCl_(4)^(2-) families, and for the solid phase in one of the non-mesomorphic Cl^(-) salts. The highest ionic conductivity was found for the smectic mesophase of the ReO_(4)^(-) containing salt, whereas the solid phases of all salts were dominated by electronic contributions. The ionic conductivity may be favored by the mesophase lamellar structure.