Entrevista com Riachão: Eu acredito, e digo a você que eu nasci, parece que eu nasci cantando, eu tenho a impressão que eu nasci cantando

Entrevista com Riachão: Eu acredito, e digo a você que eu nasci, parece que eu nasci cantando, eu tenho a impressão que eu nasci cantando

EMERGÊNCIA E CRESCIMENTO DE Urochloa brizantha cv. Marandu EM FUNÇÃO DO INCRUSTAMENTO DA SEMENTE E PROFUNDIDADE DE SEMEADURA

The crop-livestock integration (ILP) consist in the adoption of several techniques, for better use of areas, formation and recovery of degraded pastures. The species of the genus Urochloa has been highlighted in the ILP and practices such as the type of seed used and the depth of sowing are fundamental for the establishment and production of the pasture. The objective of this research was to evaluate the emergence and growth of plants of Urochloa brizantha cv. Marandu, originating from seeds incrusted or not, sown in different depths and soils. The experimental design was a randomized block design with four replications. The treatments were arranged in a 2x5 factorial scheme, composed of two types of seeds (incrusted or not) seeded in five depths (0; 1; 2.5; 5; 10cm) in medium textured and clayey soils. Plants of U. brizantha from seeds incrusted and cultivated in medium textured soil presented higher emergence, but lower growth in relation to the plants coming from non-incrusted seeds. In soils of clayey texture, the use of incrusted seeds promoted a greater speed of emergency, but less growth of the plants. The sowing of U. brizantha at 1.0 and 2.5 cm depth provided a higher emergence speed, regardless of soil texture and type of seed. After forage cutting, the greatest tillering of regrowth was observed in plants from non-encrusted seeds and sown in soil up to 2.5 cm deep. At regrowth, there was no effect of treatments on forage yield.A integração lavoura-pecuária (ILP) consiste na adoção de várias técnicas para melhor aproveitamento de áreas, formação e recuperação de pastagens degradadas. As espécies do gênero Urochloa tem-se destacado na ILP e o tipo de semente utilizada e a profundidade de semeadura são fundamentais para o estabelecimento e produção da forrageira. Objetivou-se nesta pesquisa avaliar a emergência e o crescimento de plantas de Urochloa brizantha cv. Marandu, oriundas de sementes incrustadas ou não, semeadas em diferentes profundidades e solos. O delineamento usado foi o de blocos casualizados, com quatro repetições. Os tratamentos foram arranjados em esquema fatorial 2x5, composto por dois tipos de sementes (incrustadas ou não) semeadas em cinco profundidades (0; 1; 2,5; 5; 10cm) em solos de textura franco argilo arenosa (TFAA) e argilosa (TA). Plantas de U. brizantha oriundas de sementes incrustadas e estabelecidas em solo de TFAA apresentaram maior emergência, mas menor crescimento em relação às plantas provindas de sementes não incrustadas. Em solo de TA, o uso de sementes incrustadas promoveu maior índice de velocidade de emergência, mas menor crescimento das plantas. A semeadura de U. brizantha com sementes incrustadas e não incrustadas a 1,0 e 2,5 cm de profundidade proporcionaram maior velocidade de emergência, independente da textura do solo. Após o corte da forrageira, o maior perfilhamento da rebrota foi observado em plantas oriundas de sementes não incrustadas e semeadas em solo de TA até 2,5 cm de profundidade. Na rebrota, não houve efeito dos tratamentos sobre o rendimento de foragem

Análise de conservantes em produtos cárneos: uma proposta para ecoformação de técnicos em química

This article relates the experience of using the analytical control of preservatives in meat products as a creative pedagogical alternative for a course of "Instrumental Analysis II" during professional secondary education of Chemical Technicians, by considering the professional education from a polytechnical and unitary perspective This proposal aimed to contribute to a more contextualized and defragmented teaching-learning process. Knowledge about analytical techniques (liquid chromatography coupled to mass spectrometry and capillary electrophoresis) was related to its importance for public health and for the academic training of Chemical Technicians. This project provided students with important experiences for job outlook, contributing to provide students with hands-on practice in conducting experiments and using various instruments and techniques properly.En este artículo, relatamos la experiencia de la utilización de la temática del control analítico de conservantes en productos cárnicos como una alternativa pedagógica creativa ecoformadora para el componente curricular "Análisis Instrumental II" de un curso Técnico Integrado en Química, considerando la educación profesional desde una perspectiva politécnica y unitaria. Esta propuesta pretendía contribuir a un proceso de enseñanza-aprendizaje más contextualizado y desfragmentado. Se han relacionado conocimientos sobre técnicas analíticas (cromatografía líquida acoplada a la espectrometría de masas y electroforesis capilar) con su importancia para la salud pública y para la formación académica de los Técnicos en Química. Este proyecto proporcionó a los estudiantes experiencias importantes para su inclusión en el mundo del trabajo, contribuyendo a su preparación para futuros itinerarios formativos y ocupaciones dentro del área de la Química.Neste artigo, relatamos a experiência da utilização da temática do controle analítico de conservantes em produtos cárneos como uma alternativa pedagógica criativa ecoformadora para o componente curricular “Análise Instrumental II” de um curso Técnico Integrado em Química, considerando a educação profissional em uma perspectiva politécnica e unitária. Esta proposta visou contribuir para um processo de ensino-aprendizagem mais contextualizado e desfragmentado, relacionando conhecimentos sobre técnicas analíticas (cromatografia líquida acoplada à espectrometria de massas e eletroforese capilar) com a sua importância para a saúde pública e para a formação acadêmica dos Técnicos em Química. Este projeto proporcionou aos estudantes experiências importantes para sua inclusão no mundo do trabalho, contribuindo para a preparação de futuros percursos formativos e ocupações dentro da área da Química

Social interaction with rat exposed to constant light during lactation prevents depressive-like behavior induced by constant light in adulthood

AbstractCircadian rhythm disruptions are often observed in depressed patients, and changes in the light/dark cycle promote depressive-like behavior in animal models. Prolonged exposure to constant light (LL) is known to lead to arrhythmicity of circadian locomotor activity and depressive-like behavior in rats. Interestingly, neonatal exposure to LL prevents both arrhythmicity and depressive behavior in adulthood. Arrhythmic rats under LL conditions that cohabitate with a rhythmic rat exhibit improvement in circadian rhythms. We tested whether such cohabitation also protects against LL-induced depressive-like behavior. Wistar rats were assigned to conditions of either neonatal constant light (neonatal-LL) on postnatal days 10–22 or a regular light/dark cycle (neonatal-LD). On day 45, the animals were assigned to three possible pair combinations. After a baseline sucrose preference test, half of the pairs were placed under LL conditions. Weekly sucrose preference tests were conducted to evaluate depressive-like behavior. The animals were isolated by an aluminum wall on the test day. At week 2 of LL, sucrose preference was reduced in neonatal-LD/neonatal-LD pairs of animals. At week 5, neonatal-LD/neonatal-LD pairs exhibited anhedonic-like behavior, but the pairs with at least one neonatal-LL rat did not. The LL cycle was returned to an LD cycle, and the neonatal-LD/neonatal-LD pairs exhibited a restoration of sucrose preference 2 weeks later. We conclude that social interaction can prevent depressive-like behavior induced by circadian rhythm disruption as long as one of the animals is more prone to present a strong rhythm

Interrelation of Solidification Processing Variables and Microstructure of a Horizontally Solidified Al-based 319.1 Alloy

In this paper, primary (λ1) and tertiary (λ3) dendritic arm spacings of a ternary Al – 7wt.% Si – 3 wt.% Cu alloy casting were characterized and correlated with solidification processing variables: growth rates (VL), cooling rates (TC) as well as local solidification times (tSL). Horizontal directional solidification experiments were carried out under transient heat extraction undergoing cooling rates varying from 0.9 oC/s to 22 oC/s to be associated with samples having quite different microstructural length parameters. Techniques of metallography and optical microscopy were applied in order to have λ1 and λ3 measured. The obtained as-cast microstructures consisted of dendritic α-Al, with Si particles in the aluminum-rich matrix as well distributed along the interdendritic regions in the eutectic mixture interlinked with θ (Al2Cu) intermetallic phase developing the microstructure α-Al + θ + Si. The results showed that power laws – 1.1, – 0 .55 and 0.55 express the variations of both λ1 and λ3 with VL, TC and tSL, respectively, for investigated alloy. A comparative study with the Al – 3wt.% Cu alloy from literature was also performed and the results show that the growth law of λ1 as a function of TC is represented, for both the investigated alloys, by the mathematical expression given by λ1 = constant (TC)-0.55

Effect of the T6 Heat Treatment on Microhardness of a Directionally Solidified Aluminum-Based 319 Alloy

Aluminum alloys of the ANSI series 319 present Si and Cu as the main alloying elements and the mechanical strength of these alloys can be improved by the precipitation of the metastable Al2Cu phase during the ageing heat treatment. In this paper, the Al-5.5wt.%Si-3wt.%Cu alloy was elaborated and solidified in a water-cooled horizontal directional solidification device. The as-cast ingot was subjected to the precipitation hardening heat treatment (T6 heat treatment), which consisted of: solution for 5 h at 490°C±2°C, followed by quenching in water at 60°C±2°C and ageing for 3 h at 155°C±2°C, and cooling-air. Secondary dendrite arm spacing (λ2) measurements were carried out before and after T6 heat treatment. The mechanical strength of the alloy was investigated by the microhardness test. It has been found that the heat treatment did not influence the λ2 values, however, highest HV values have been observed for the heat-treated samples.FAPESPA - Fundação Amazônia de Amparo a Estudos e PesquisasMAGNO, I. A. B.; SOUZA, F. V. A.; BARROS, A. S.;NASCIMENTO, J. M.; ROCHA, O. F. L. Universidade Federa do Par

Caracterização de frutos de progênies de meios-irmãos de maracujazeiro-amarelo em Rio Branco - Acre Physicochemical characteristics of fruits of progenies of yellow passion fruit tree half-sib in Rio Branco - Acre

O presente estudo teve como objetivo avaliar e caracterizar 39 progênies de meios-irmãos de maracujazeiro-amarelo para subsidiar o programa de melhoramento genético desta cultura. O delineamento experimental foi em blocos casualizados, com 39 tratamentos (39 progênies de meios-irmãos), com 2 repetições e 5 plantas por parcela. As avaliações foram feitas no segundo ano de produção. As características avaliadas foram: comprimento e diâmetro do fruto, relação comprimento/diâmetro, massa do fruto, da casca e da polpa, rendimento da polpa (arilo + sementes), espessura da casca, acidez titulável, teor de sólidos solúveis e relação sólidos solúveis /acidez titulável. Com base nas características físico-químicas dos frutos, foi possível fazer uma caracterização das 39 progênies de meios-irmãos avaliadas. Os frutos das progênies 3; 27 e 39 apresentam características desejáveis para o mercado in natura, enquanto os das progênies 9; 10; 16; 17; 32 e 38 têm características importantes para o processamento.<br>The present study aimed to evaluate and to characterize 39 progenies of half-sib of yellow passion fruit tree to subsidize the program of genetic breeding of this culture. The experimental design was carried out in randomized blocks, with 39 treatments (39 progenies of half-sibs), with 2 replications and 5 plants per plot. The evaluations were done in the second year of production. The evaluated characteristics were: length and diameter of the fruit, relation of length/diameter, mass of the fruit, of the skin and of the pulp, yield of pulp (arils + seeds), thickness of the skin, titratable acidity (TA), soluble solid content (SS) and SS/TA relation. On the basis of the physicochemical characteristics of the fruits, it was possible to make a characterization of the 39 progenies of the evaluated half-sibs. The fruits of progenies 3, 27 and 39 present desirable characteristics for the in natura market, while the progenies 9, 10, 16, 17, 32 and 38 have important characteristics for the processing