Quatrocentas e setenta e sete cultivares de milho estão disponíveis no mercado de sementes do Brasil para a safra 2015/16.

O produtor que deseja ser bem sucedido em sua propriedade deve prestar atenção à semente, porque se trata do principal insumo de uma lavoura. Aspectos relacionados às características da cultivar, tais como: potencial produtivo, estabilidade, resistência a doenças e adequação ao sistema de produção em uso e às condições edafoclimáticas, deverão ser levados em consideração, para que a lavoura se torne mais competitiva e lucrativa para o produtor. Recentemente o cultivo do milho no Brasil vem alcançando rendimentos relevantes de produtividade. Principalmente nestas duas ou três últimas safras, a cultura do milho experimentou um novo patamar de produtividade, só antes alcançado por países considerados desenvolvidos e detentores de agricultura de alto nível tecnológico. Não são raros alguns produtores com nível de tecnologia mais elevado atingirem produtividades próximas de 12 t ha-1. O aumento do rendimento de grãos de milho por área tem acontecido graças ao avanço tecnológico proporcionado pelo desenvolvimento de cultivares com genética superior, passando por novas tecnologias, como o milho Bt, serviços e informações disponibilizados, até o nível de profissionalismo atingido pelos agricultores. A adoção de práticas de manejo que proporcionem maior nível de respostas e segurança às cultivares atualmente disponibilizadas no mercado pelas indústrias de sementes garante maior segurança ao produtor na obtenção de altos rendimentos de grãos. Este documento visa levar até o produtor de milho uma relação de cultivares disponibilizadas no mercado de sementes, na safra 2015/2016, desde variedades, milhos especiais e híbridos (duplos, triplos e simples) normais e transgênicos, bem como toda informação sobre as características de cada cultivar, além de informações sobre o comportamento delas quanto às principais doenças que atacam a cultura.bitstream/item/140279/1/doc-184.pd

Identificação e composição química de espécies de invasoras consumidas por bovinos em pastagens cultivadas em Paragominas, Pará.

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Derivative chromosome 7 in a newborn with hypotelorism, cleft palate, agenesis of corpus callosum and semilobar holoprosencephaly

Cytogenetically visible unbalanced chromosome rearrangements involving the euchromatic regions most often result in severe phenotypic features. Often, it is not possible at microscopic level to distinguish if a chromosomal anomaly involves one or more than one chromosome. In these cases, the parents study is fundamental and is usually the first line of study. We report a female newborn with multiple anomalies. Ultrasonography at 32+6 weeks of gestation revealed moderate ventricular dilatation, microcephaly and intrauterine growth restriction (IUGR). Delivery was at 35 weeks and microcephaly, hypotelorism, complete medium cleft palate with nasal depression, agenesis of the corpus callosum, thalamic fusion and fusion of the lateral ventricles in the frontal region suggestive of semilobar holoprosencephaly (HPE) was observed. Seizures and nistagmus were described since the eighth day. Hypotonia was present. In addition, diabetes insipidus was diagnosed. Sepsis was developed at day 14 followed by death at day 18 in consequence of seizures and respiratory insuficiency. Cytogenetic analysis revealed an abnormal chromosome 7qter as a result of an unbalanced segregation of a maternal reciprocal translocation t(7;19), with breakpoints at 7q36.1 and 19q13.42. The newborn karyotype is 46,XX,der(7)t(7;19)(q36.1;q13.42)mat. The patient presented a partial trisomy of the region 19q13.42→qter and a partial monosomy of the region 7q36.1→7qter. Partial monosomy of chromosome 7qter has been characterized by a wide phenotypic manifestations, but HPE, microcephaly, midface hypoplasia, maxillary anomalies and sacral agenesis are frequently described. However, is not often reported in newborns. Partial trisomy 19q is a rare and severe condition, and has been described associated with low birth weight, growth retardation, microcephaly, seizures, dysmorphic facial features, short neck, clynodactyly, heart malformations, anomalies of the genitor-urinary and gastrointestinal tract. To our knowledge, there is only one previous case of der(7)t(7q;19q)(q36.1;q13.43) described, in a fetus who presented severe sacral agenesis and IUGR. The case herein reported presents some of the most common features of 7q36 partial monosomy and 19q terminal trisomy, although some of them are present in both conditions. The presence of those two imbalances may complicate the final phenotype but the important matter will be the counseling of the couple and to prevent future imbalances in their offspring.N/

Dynamic separation on a pitching and surging airfoil as a model for flow over vertical axis wind turbine blades

Vertical axis wind turbine (VAWT) blades undergo dynamic separation due to the large angle of attack variation they experience during a turbine rotation. The flow over a single blade was modeled using a sinusoidally pitching and surging airfoil in a constant free stream flow at a mean chord Reynolds number of 10^5. Two-dimensional, time resolved velocity fields were acquired using particle image velocimetry (PIV). Vorticity contours were used to visualize shear layer and vortex activity. A low order model of dynamic separation was developed using Dynamic Mode Decomposition (DMD). A primary and secondary dynamic separation mode were identified as the critical drivers for the unsteady flow field

Bio4gas : evaluation and analysis of wastewater treatment facilities in the scope of biogas production maximization and energy production optimization

The present work presents some of the results of five reports developed in the scope of optimization feasibility studies carried out at 6 small- and medium-sized wastewater treatment plants (WWTP) in Portugal. These 6 WWTP are operated by five companies that belong to the Águas de Portugal holding. The objective of the studies was twofold: to assess to which extent the production of biogas could be increased by means of operational modifications and/or by the implementation of co-digestion regimes; and also to simulate different scenarios for feed-in tariff of electricity taking in account energy prices calculated based upon the DL n.º 225/2007 of 11th May. In this way, several codigestion scenarios were defined based upon standard available organic residues. The results obtained showed that the implementation of co-digestion regimes represent a significative potential to increase the production of biogas, in some cases, over 600%. Even though, it was concluded that in some cases the costs of introducing new regimes of energy management were not supported by the increase of energy production, so a scale factor is associated to the revenues. This study contributed to the establishment of specific needs in terms of information management (digester operation, energy production/consumption, strategy for optimisation)

Envolvimento em Atividades Extra-Classe, Avaliação do Curso e Perspectivas de Licenciandos em Biologia da Universidade Federal de Pernambuco

Esta pesquisa avaliou o desempenho acadêmico e envolvimento em atividades extracurriculares de licenciandos em Ciências Biológicas da Universidade Federal de Pernambuco. Foram aplicados questionários anônimos a 130 alunos, questionando seu perfil; envolvimento em atividades extraclasse, desempenho acadêmico, disciplinas e metodologias de ensino que mais admiram e expectativas em relação ao curso. Apenas 7,7% dos alunos são monitores, 15,4% realizam estágios de pesquisa e 13,8% participam de ações extensionistas. Os licenciandos preferem metodologias e critérios de avaliação que envolvam participação ativa como pesquisas e práticas de laboratório, mas rejeitam procedimentos conteudistas como leitura de textos e aulas expositivas. Ainda quepretendam ser pesquisadores, os estudantes não se envolvem em pesquisas sobre Ensino de Biologia, optando por áreas específicas da Biologia. O baixo envolvimento dos alunos em atividades de monitoria e extensão pode comprometer a interação universidade-escolasociedade e limitar o repertório metodológico e teórico do futuro professor

Can lightning be a noise source for a spherical gravitational wave antenna?

The detection of gravitational waves is a very active research field at the moment. In Brazil the gravitational wave detector is called Mario SCHENBERG. Due to its high sensitivity it is necessary to model mathematically all known noise sources so that digital filters can be developed that maximize the signal-to-noise ratio. One of the noise sources that must be considered are the disturbances caused by electromagnetic pulses due to lightning close to the experiment. Such disturbances may influence the vibrations of the antenna's normal modes and mask possible gravitational wave signals. In this work we model the interaction between lightning and SCHENBERG antenna and calculate the intensity of the noise due to a close lightning stroke in the detected signal. We find that the noise generated does not disturb the experiment significantly.Comment: 5 pages, 6 figure