Foraminíferos da passagem Jurássico Inferior-Médio da Bacia Lusitânica: os perfis da Murtinheira, Sector Setentrional e de Zambujal de Alcaria, Sector Central

A análise da diversidade taxonómica e das abundâncias relativas nas associações de foraminíferos da passagem Jurássico Inferior-Médio em dois sectores da Bacia Lusitânica indica que tais associações apresentam diferenças nas suas composições, aparentemente homogéneas. Assim, as asscoiações de zonas proximais (Perfil de Zambujal Alcaria) são mais abundantes e com maior diversidade que as registadas em zonas distais (perfil da Murtinheira). Além disso, a maioria dos taxa comuns em ambas as zonas apresentam diferenças nas suas abundâncias relativas, que aprecem resultar de preferências paleo-ambientais distintas

Benign Bilateral Adenomyoepithelioma of the Mammary Gland in a Ring-tailed Lemur (Lemur catta)

Naturally occurring mammary tumours are uncommon in prosimians. A 20-year-old female ring-tailed lemur (Lemur catta) developed bilateral enlargement of the mammary glands. Surgical removal revealed that both masses were comprised of multiple nodules and cystic areas that entirely replaced the normal glands. Histologically, a benign neoplastic biphasic cellular proliferation, composed of luminal–epithelial and basal–myoepithelial components, was identified. Immunohistochemical analysis for expression of cytokeratin (CK) AE1/AE3, CK7, CK5 + 8, CK14, vimentin, p63 and 14-3-3σ highlighted the biphasic nature of the neoplasm. A low mitotic count, low Ki67 labelling index, expression of oestrogen receptor-α, lack of expression of human epidermal growth factor receptor and a 3-year disease-free period without recurrence supported the benign nature of the tumour. Macroscopically, histologically and immunohistochemically this neoplasm resembled benign adenomyoepithelioma of the breast in women. This is the first complete report of a naturally occurring mammary tumour in a ring-tailed lemur

Foraminifers from the Lower-Middle Jurassic boundary of the Lusitanian Basin: Murtinheira section (North Sector) and Zambujal de Alcaria section (Central Sector)

Comunicação apresentada ao VIII Congresso Nacional de Geologia, em Braga (9-16 de Julho 2010)análise da diversidade taxonómica e das abundâncias relativas nas associações de foraminíferos da passagem Jurássico Inferior-Médio em dois sectores da Bacia Lusitânica indica que tais associações apresentam diferenças nas suas composições, aparentemente homogéneas. Assim, as associações de zonas proximais (perfil de Zambujal de Alcaria) são mais abundantes e com maior diversidade que as registadas em zonas distais (perfil da Murtinheira). Além disso, a maioria dos taxa comuns em ambas as zonas apresentam diferenças nas suas abundâncias relativas, que parecem resultar de preferências paleo-ambientais distintas.The analysis of diversity and relative abundances of foraminiferal assemblages from two sections located in the Lusitanian Basin, and corresponding to the Lower-Middle Jurassic boundary, shows that these apparently homogeneous assemblages present differences in their composition. Assemblages from shallow zones (Zambujal de Alcaria section) show higher diversity and abundance than assemblages from deeper zones (Murtinheira section). Species recorded in both areas show distinct values on their relative abundances, as a possible relationship with their palaeo-environmental preferences

Quark lepton complementarity and renormalization group effects

We consider a scenario for the Quark-Lepton Complementarity relations between mixing angles in which the bi-maximal mixing follows from the neutrino mass matrix. According to this scenario in the lowest order the angle \theta_{12} is \sim 1\sigma (1.5 - 2^\circ) above the best fit point coinciding practically with the tri-bimaximal mixing prediction. Realization of this scenario in the context of the seesaw type-I mechanism with leptonic Dirac mass matrices approximately equal to the quark mass matrices is studied. We calculate the renormalization group corrections to \theta_{12} as well as to \theta_{13} in the standard model (SM) and minimal supersymmetric standard model (MSSM). We find that in large part of the parameter space corrections \Delta \theta_{12} are small or negligible. In the MSSM version of the scenario the correction \Delta \theta_{12} is in general positive. Small negative corrections appear in the case of an inverted mass hierarchy and opposite CP parities of \nu_1 and \nu_2 when leading contributions to \theta_{12} running are strongly suppressed. The corrections are negative in the SM version in a large part of the parameter space for values of the relative CP phase of \nu_1 and \nu_2: \phi > \pi/2.Comment: version as published in PRD, 14 pages, 12 figure

Tarsis y la monarquía unificada de Israel

El hallazgo de numerosos restos fenicios de datación anterior al inicio de la colonización fenicia occidental y la explotación de recursos evidenciada identifican el hábitat de Huelva con Tarsis desde su mención en 1 Reyes 10.22. Sin embargo, la reciente revisión de la fiabilidad histórica de la Biblia cuestiona tanto esta identidad como unas navegaciones fenicias al lejano Occidente en la segunda mitad del siglo X a.C. El presente trabajo apunta que Jerusalén pudo constituir en esa época un centro de poder y asegura la existencia de escribas en el siglo IX a.C. que dispusieron de noticias fiables sobre acontecimientos del reinado de Salomón.The find of numerous Phoenician remains, dated prior to the beginning of Western Phoenician colonization, and the exploitation of resources evidenced thereof, identify the Huelva habitat with Tarshish since its mention in 1 Kings 10.22. However, this identity together with the Phoenician voyages to the far West in the second half of the 10th century BC, are somehow questioned by the recent revision of the historical reliability of the Bible. The present work suggests that Jerusalem might have been a power center at that time and assures the existence of scribes, towards mid 9thh century BC, who handled trustworthy news of certain events during the kingdom of Solomon