Lobe identity in the Mongolian gerbil prostatic complex: A new rodent model for prostate study

Knowledge of structural and physiological differences among the prostatic lobes (PL) is the basis for development of experimental studies in traditional laboratory rodents. Although Mongolian gerbil reproductive organs have been increasingly investigated, its prostate structure is far from being properly known, and investigations of this organ focused on the ventral lobe (VL). Thus, the present study provides a thorough morphological description of prostatic complex in the male adult gerbil on the basis of topographic, histological, and ultrastructural analysis and ductal branching. Like other rodents, four pairs of PL were observed. However, in contrast to the rat and mouse, the VL is the least voluminous component and the dorsolateral lobe (DLL) is the most prominent and spatially isolated from remaining PL. The occurrence of a dorsal lobe (DL), hidden between bladder and insertion of seminal vesicles, has not been mentioned in previous reports with Mongolian gerbil. Collagenase digestion followed by microdissection revealed that, except for DL, which has a tubularacinar organization, all PL exhibit tubular organization and variable ductal branching. Distinct histological and ultrastructural features such as secretory epithelium, aspect of luminal secretion and stromal organization are reported for each PL and are confirmed by morphometric and stereological methods. Histological sections showed at least three intralobar segments in VL and DL. Ultrastructural analysis evidenced that, although luminal epithelial cells of PL share typical features of exocrine secretory cells, there are striking lobe phenotypical variations. Both merocrine and apocrine pathways are observed in variable rates in all PL, with the predominance of the former in the DLL and the latter in the CG. The morphological observations presented herein point to distinct structural identities for each PL, which probably reflects,specific functional compromise of seminal fluid secretion. These data also point to the gerbil as a good model for investigations concerning the regulation of prostate development and homeostasis, mainly with regard to the dorsal and dorsolateral PL.

Light-front zero-mode contribution to the Ward Identity

In a covariant gauge we implicitly assume that the Green's function propagates information from one point of the space-time to another, so that the Green's function is responsible for the dynamics of the relativistic particle. In the light front form one would naively expect, that this feature would be preserved. In this manner, the fermionic field propagator can be split into a propagating piece and a non-propagating (contact) term. Since the latter (contact) one does not propagate information; and therefore, supposedly can be discarded with no harm to the field dynamics we wanted to know what would be the impact of dropping it off. To do that, we investigated its role in the Ward identity in the light front. Here we use the terminology Ward identity to identify the limiting case of photon's zero momentum transfer in the vertex from the more general Ward-Takahashi identity with nonzero momentum transfer.

A busca do ser e da arte em O Cavaleiro Inexistente de Ítalo Calvino

Pós-graduação em Letras - IBILCE

A dança como mediadora na formação da criança

This paper analyzes the dance, considered the oldest of the Arts, inserted in Art and Education. When you talk about dance as art, sought to articulate dance, body movement and music, because all these aspects are crucial when it comes to education in dance. Thus, this paper, by analyzing the meaning of dance over time, also made a parallel with the evolution of the concept of body that, throughout history, became the focus of sin, to currently be seen in optical freedom and autonomy, looking up from childhood, the formation of body awareness and embodiment, as a basis for identity and the formation of a positive self-image. In describing the evolution of dance, between different societies, it was shown that the tool is the dancer's own body and that for its use, it is necessary to look at its interior, human vitality, musicality and sensitivity. Proved that dance since the beginning, has been seen as a medium body, as well as desires and deepest sorrows of humanity, linked to religion, ritual or ceremonial, reaching today the freest expression of body, in modern dance. Given these considerations, based on theoretical frameworks, emphasized the importance of dance in middle school, focusing on their educational role and liberating, showing that it must be used as a tool for teaching and learning, and the development of children , given its interdisciplinary character, this Crosscutting Themes in elementary school and early childhood education curriculum benchmark. The paper concludes that, despite legislation and official documents require training for dance in the school curriculum, very little is done in this direction, which shows that there is still a choice of schools, the immobility of the pupils

The Cuticular Hydrocarbons Profiles in the Colonial Recognition of the Neotropical Eusocial Wasp, Mischocyttarus cassununga (Hymenoptera: Vespidae)

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Plasma Steroid Dynamics in Late- and Near-term Naturally and Artificially Conceived Bovine Pregnancies as Elucidated by Multihormone High-resolution LC-MS/MS

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)