Gliosarcoma with neuroaxis metastases.

Gliosarcomas are rare tumours of the central nervous system, with a well-known capacity for metastasis. When they metastasise, the dissemination occurs more frequently via the haematogenous route to extraneural sites. Metastasis-spread through the cerebrospinal fluid is extremely rare. We present the case of a 58-year-old man who underwent a gross total resection of a lesion in the left temporal lobe. The histological findings revealed a gliosarcoma and the patient received radiotherapy followed by chemotherapy. Seven months after surgery, while the patient remained neurologically intact, brain and spinal cord MRI revealed tumour recurrence and neuroaxis metastases through the traffic routes of the cerebrospinal fluid. The patient died 8 months after the diagnosis. A PubMed search regarding metastatic gliosarcoma up to June 2015 was also carried out. To the best of our knowledge, this is the first case report of gliosarcoma metastases to the brain and spinal cord leptomeninges

Model for erosion-deposition patterns

We investigate through computational simulations with a pore network model the formation of patterns caused by erosion-deposition mechanisms. In this model, the geometry of the pore space changes dynamically as a consequence of the coupling between the fluid flow and the movement of particles due to local drag forces. Our results for this irreversible process show that the model is capable to reproduce typical natural patterns caused by well known erosion processes. Moreover, we observe that, within a certain range of porosity values, the grains form clusters that are tilted with respect to the horizontal with a characteristic angle. We compare our results to recent experiments for granular material in flowing water and show that they present a satisfactory agreement.Comment: 8 pages, 12 figures, submitted to Phys. Rev.

Topological Defects and the Spin Glass Phase of Cuprates

We propose that the spin glass phase of cuprates is due to the proliferation of topological defects of a spiral distortion of the antiferromagnet order. Our theory explains straightforwardly the simultaneous existence of short range incommensurate magnetic correlations and complete a-b symmetry breaking in this phase. We show via a renormalization group calculation that the collinear O(3)/O(2) symmetry is unstable towards the formation of local non-collinear correlations. A critical disorder strength is identified beyond which topological defects proliferate already at zero temperature.Comment: 7 pages, 2 figures. Final version with some changes and one replaced figur

Ovinos Santa Inês: estado de arte e perspectivas.

[Santa Inês hair sheep: state of art and perspectives]. Abstract: The Santa Inês hair sheep breed is found in whole to areas of Brazil. Its origin has been object of vary speculations. However, the most probable could be traced starting from combinations of four genetic sources: a) Criuola is wool type of sheep, brought by Portuguese and Spanish settlers, but that eliminated the wool under tropical conditions was; b) Hair sheep breeds originating from of the African continent, which originated most of the hair sheep breeds from Brazil, Central America and Caribbean; c) Bergamácia sheep breed from Italian, which was crossed with the remaining sheep of those originating from of the African continent, and Morada Nova, followed by adaptation, selection and evolution for absence of wool; d) finally, in the end of the decade of 80, a small group of the breeders added to Santa Inês the Somalis and Suffolk breeds. The breed presents good reproductive, adaptability and growth potential. The pattern of the coat calor includes the white, the red, the black and the mailed. In field conditions the ewes reach weights of 40-60 kg and the males can reach up to 120 kg. The selection practiced in the breed has been done in direction for size and body weight, absence of wool and horns and, presence of an intense pigmentation. The females present good maternal ability and they get easily to give birth vigorous lambs. The age to the puberty and first lambing, lambing interval, fertility, the prolificacy and the survival rate from weaning found in the literature, vary from: 274 to 376 days, 442 to 551 days, 227 to 307 days, 83,6 to 93%, 1,1 to 1,4 and, from 69 to 87%, respectively. The Santa Inês lamb can reach 23-32 kg at weaning and gain 166 -336 kg. At slaughter, Santa Inês Lamb, had dressing percentage of approximately 48,0 %. The animals generally demonstrate capacity to develop a strong answer immunology against the nematodes gastrontestinais, even before of the weaning. That skin presents great market value, due to the high quality pattern, resultant of its largest elasticity and excellent flexibility, and great resistance, associated to a fine texture, being rendered for use in several manufactured products. In spite of the few studies involving the face Santa Inês the breed has been demonstrating to be an excellent alternative to increase the production of meat in the main areas of the country, considering its reproductive capacity, resistance sponges it gastrontestinais, skin quality and adaptability , besides good growth rate

Efeito do sombreamento na produtividade de milho em sistemas agrossilvipastoris.

O objetivo do trabalho foi avaliar a influência da sombra, na área de influência da cultura árborea, sobre a produtividade do milho em um sistema agrosilvipastoril

Cooking quality and physicochemical traits of upland rice with different amylose content.

The objective of this study is to characterize genotypes of upland rice with different amylose content regarding cooking quality by using different physicochemical tools.IRC14-0643

Programa de Melhoramento Genético de Caprinos e Ovinos de Corte (GENECOC): capacitação gerencial de usuários.

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Robust zero-energy modes in an electronic higher-order topological insulator: the dimerized Kagome lattice

Quantum simulators are an essential tool for understanding complex quantum materials. Platforms based on ultracold atoms in optical lattices and photonic devices led the field so far, but electronic quantum simulators are proving to be equally relevant. Simulating topological states of matter is one of the holy grails in the field. Here, we experimentally realize a higher-order electronic topological insulator (HOTI). Specifically, we create a dimerized Kagome lattice by manipulating carbon-monoxide (CO) molecules on a Cu(111) surface using a scanning tunneling microscope (STM). We engineer alternating weak and strong bonds to show that a topological state emerges at the corner of the non-trivial configuration, while it is absent in the trivial one. Contrarily to conventional topological insulators (TIs), the topological state has two dimensions less than the bulk, denoting a HOTI. The corner mode is protected by a generalized chiral symmetry, which leads to a particular robustness against perturbations. Our versatile approach to quantum simulation with artificial lattices holds promises of revealing unexpected quantum phases of matter

Multi-purpose and Multi-source Energy Management System for Biomedical Implants

AbstractThis paper describes a multi-purpose energy management system that can harvest energy from a multitude of power sources. In order to suffice power needs of a smart hip prosthesis, a prototype was built considering the use of two types of power sources: energy harvesting micro-power generators for intermittent implant electronics powering; wireless energy, by means of an activation system, responsible for, when needed, continuously powering the implant electronics and also configuring its mode of operation. Intermittently or continuously, it is now possible to energize more power demanding systems as the ones that uses a RF transceiver. The smart hip prosthesis can now become a wireless body sensor network node using LR-WPAN protocols such as Bluetooth low energy as is intended in this work. Preliminary results proved that is possible to energize a Bluetooth low energy module, for over 100 s, solely using the stored energy produced by one of the micro-power generators