Produção de fitomassa leguminosas isoladas e consorciadas com milheto e teor relativo de clorofila em feijoeiro orgânico em plantio direto.

O objetivo do presente trabalho foi de avaliar a produção de fitomassa de leguminosas isoladas e consorciadas com milheto e seu efeito no teor de clorofila do feijoeiro comum orgânico em sistemas de plantio convencional e direto.CONAFE

Efeito de leguminosas isoladas e consorciadas com milheto no crescimento de feijoeiro orgânico em plantio direto.

O objetivo do presente trabalho foi de avaliar o efeito de leguminosas isoladas e consorciadas com milheto no crescimento do feijoeiro comum orgânico em sistemas de plantio convencional e direto.CONAFE

Scaling properties of protein family phylogenies

One of the classical questions in evolutionary biology is how evolutionary processes are coupled at the gene and species level. With this motivation, we compare the topological properties (mainly the depth scaling, as a characterization of balance) of a large set of protein phylogenies with a set of species phylogenies. The comparative analysis shows that both sets of phylogenies share remarkably similar scaling behavior, suggesting the universality of branching rules and of the evolutionary processes that drive biological diversification from gene to species level. In order to explain such generality, we propose a simple model which allows us to estimate the proportion of evolvability/robustness needed to approximate the scaling behavior observed in the phylogenies, highlighting the relevance of the robustness of a biological system (species or protein) in the scaling properties of the phylogenetic trees. Thus, the rules that govern the incapability of a biological system to diversify are equally relevant both at the gene and at the species level.Comment: Replaced with final published versio

Column formation and hysteresis in a two-fluid tornado

Ponencia de: 6th International Conference Heat and Mass Transfer and Hydrodynamics in Swirling Flows 21–23 November 2017, Novosibirsk, Russian FederationThis experimental and numerical study addresses a flow of water and sunflower oil. This flow is driven by the rotating lid in a sealed vertical cylinder. The experiments were performed in a glass container with a radius of 45 mm and a height of 45 mm with the water volume fraction of 20%. Different densities and immiscibility of liquids provide the stable and sharp interface. At the rest, the interface is flat and horizontal. As the rotation speeds up, a new water-flow cell emerges near the bottom center. This cell expands and occupies almost the entire water domain while the initial water circulation shrinks into a thin layer adjacent to the interface. The water, rising near the container axis, strongly deforms the interface (upward near the axis and downward near the sidewall). A new oil-flow cell emerges above the interface near the axis. This cell disappears as the interface approaches the lid. The water separates from the sidewall, reaches the lid, and forms a column. As the rotation is decreased, the scenario reverses, but the flow states differ from those for the increasing rotation, i.e., a hysteresis is observed. The numerical simulations agree with the experiment and help explain the flow metamorphoses.Russian Science Foundation 14-29-0009

Multicentric Castleman's disease: a case report

Castleman's disease is a clinicopathological entity associated with lymphoproliferation. We report a case of a 71 year old gentleman who was initially clinically suspected to have lymphoma (owing to clinical features at presentation), but was later histologically confirmed to have Castleman's disease. This case report underlines the importance of definitive histological diagnosis in patients with lympadenopathic presentation associated with systemic symptoms and the distinctiveness of multicentric Castleman's disease from malignant lymphoma. In this report we also attempt to provide new insight (through the review of medical literature) into the clinical features, pathogenesis, diagnosis and treatment of this rare and relatively benign disorder

Escarificación de semillas de Indigofera hirsuta (Linneaus), Canavalia maritima (Thouars) y Crotalaria longirostrata (Hook)

El objetivo del estudio fue determinar los mejores tratamientos de escarificación para propiciar la germinación en semillas de Indigofera hirsuta, Canavalia marítima y Crotalaria longirostrata. Las semillas fueron colectadas en la región de la costa de Oaxaca, México, y sometidas a los siguientes tratamientos según la especie: C. Maritima los tratamientos fueron los siguientes: Químico 0 (testigo), 10, 15 20, 30, 40 y 60 minutos en ácido sulfúrico al 98% y físico, lijado de las semillas. Para I. hirsuta se utilizaron dos tiempos de inmersión en agua de 12 ó 24 horas y químico de 0 (testigo) 20, 30 y 60 minutos en ácido sulfúrico. Para C. longirostrata 0 (testigo), 20, 30 y 60 minutos en ácido sulfúrico. Se utilizaron 4 réplicas de 100 semillas por tratamiento los resultados fueron sometidos a un análisis de varianza y de regresión. En C. maritima, el mayor porcentaje de germinación a los 7 días se consiguió con escarificación mecánica (46Ó2,71%) y para I. hirsuta y C. longirostrata 20 minutos (93Ó3,37%) y 60 minutos (99Ó1,16%) en ácido sulfúrico en agitación, respectivamente. Las semillas de Canavalia pueden ser lijadas fácilmente y las semillas de menor tamaño como la I. hirsuta y la C. longirostrata pueden escarificarse con ácido sulfúrico, siendo tratamientos viables para aplicación en campo

Unicentric Castleman's disease approached as a pancreatic neoplasm: case report and review of literature

Castleman's disease is a rare lymphoproliferative disorder. Most cases occur in the mediastinum and the pancreatic localization is uncommon; currently there are only nine reported cases in the literature about peripancreatic localization. We report a case of a 62 years old man with a Castleman's disease mimicking a pancreatic neoplasm

Simple models for scaling in phylogenetic trees

Many processes and models --in biological, physical, social, and other contexts-- produce trees whose depth scales logarithmically with the number of leaves. Phylogenetic trees, describing the evolutionary relationships between biological species, are examples of trees for which such scaling is not observed. With this motivation, we analyze numerically two branching models leading to non-logarithmic scaling of the depth with the number of leaves. For Ford's alpha model, although a power-law scaling of the depth with tree size was established analytically, our numerical results illustrate that the asymptotic regime is approached only at very large tree sizes. We introduce here a new model, the activity model, showing analytically and numerically that it also displays a power-law scaling of the depth with tree size at a critical parameter value.Comment: 7 pages, 4 figures. A new figure, with example trees, has been added. To appear in Int. J. Bifurcation and Chao