Cell width dictates Type VI secretion tail length

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The Problematic Perception of Beauty in the Artistic Field

Scientific discoveries of neuroscience are apparently explaining all the mysteries of the human brain. In particular, great advances have been made in the field of the perception of beauty. However, historical‐philosophical revision, such as the one I carry out in this chapter, can shed light on the limits that this approach can have. To this end, I begin by reviewing the psychologization of beauty that has been carried out by David Hume since the origins of modernity. From this premise, I question the laws of art enunciated by one of the most prominent researches on neuroaesthetics, Vilayanur S. Ramachandran, by contrasting his conclusions in the light of the philosophy of art of Arthur Danto, who calls into question that the value of what is purely perceptive might be enough to understand art. He also rejects any identification of art with beauty, just as he is contrary to any general statement of the laws of art. With this contraposition, I try to show that the question of beauty in art goes far beyond mere visual perception

Y0.76Ho0.24FeGe2O7: a new member of thortveitite-like layered compounds

Y0.76Ho0.24FeGe2O7 (yttrium holmium iron digermanate) was synthesized by solid-state reaction at 1573 K. This thortveitite-like compound presents a crystallographic group–subgroup isotranslational (klassengleiche) relation with some other pyrogermanates, such as FeInGe2O7, In1.08Gd0.92Ge2O7 and InYGe2O7, which are configurationally isotypic with the Sc2Si2O7 thortveitite structure first reported by Zachariasen [(1930 ▶). Z. Kristallogr. 73, 1–6]. Holmium cations share with yttrium the 4f Wyckoff position at the center of a seven-coordinated pentagonal bipyramid, while Fe atoms also occupy one site with Wyckoff position 4f at the center of the octahedron. All these sites have the point symmetry C 1. Two types of Ge2O7 diorthogroups with point symmetry C 1h are present in the structure, each one of them defining a layer type which alternates with the other. These diorthogroups have their tetrahedral groups in an eclipsed conformation