Desenvolvimento de um sistema para caracterização de dispositivos eletroluminescentes

The materials designed to be used in electroluminescent (EL) devices construction are studied and improved since 1936. Great interests in the development of this kind of devices are mainly due to its low power consumption, flexibility, low cost and easy processing. One class of ELs devices with these characteristics are produced by employing a organic-polymeric/inorganic composite from a conductive polymer blend and an inorganic electroluminescent material (Zn2SiO4:Mn) dispersed in the polymeric matrix. This kind of device operates in d.c. or a.c. potentials, with EL of hundreds candela in the green region of the visible spectrum. However, few studies on the light emission were performed for these devices. In order to characterize devices made from composites, in this work is proposed a method of characterizing the electroluminescence associated with the impedance spectroscopy technique. To implement the technique of impedance spectroscopy was employ an experimental setup consisting of a source of a.c. voltage, an oscilloscope, and a reference resistor. Associated with this system, was use a photo diode and an analog electrometer to characterize the emitted light signal from the sample. The system was implemented allows characterization by impedance spectroscopy in the frequency range from 0.2 Hz up to 2 MHz and voltage amplitudes of 5 mV up to 20 kV. This system permits, at the same time, measurement of the RMS value of the luminance for devices in frequency range from 20 Hz up to 2 MHz. To test the system efficiency, an EL device was characterized showing analogous results to those reported in literature. By doing this, was demonstrated the efficiency of the system for electroluminescence characterization associated with the electrical characterization by impedance spectroscopy, for devices

Descrição da morfologia do aparato hiobranquial e da musculatura condrocraniana larval em espécies de Hylodidae

Estudos sobre a morfologia de larvas e adultos de anuros são importantes para apoiar hipóteses ecológicas, filogenéticas e taxonômicas das espécies. O presente trabalho teve como objetivo descrever o aparato hiobranquial larval e a musculatura condrocraniana para a família Hylodidae, utilizando-se de sete espécies: Megaelosia goeldii, Megaelosia massarti, Crossodactylus dispar, Hylodes magalhaesi, Hylodes meridionalis, Hylodes perplicatus e Hylodes heyeri. Os girinos, já fixados, pertencem à Coleção CFBH (Departamento de Zoologia, Instituto de Biociências, UNESP, Rio Claro) e estão entre os estágios de desenvolvimento 25 e 32 de acordo com a tabela de Gosner (1960). Os espécimes foram diafanizados seguindo a técnica de Taylor e Van Dyke (1985) para, posteriormente, serem fotografados e analisados sob estereomicroscópios. Para a estrutura do aparato hiobranquial, os resultados revelaram uma maior semelhança entre os gêneros Hylodes e Megaelosia e uma maior diferença entre esses dois gêneros com Crossodactylus. Para a origem e a inserção da musculatura condrocraniana, não houve diferenças significativas entre os gêneros, ocorrendo um padrão dentro das espécies analisadas. A morfologia do aparato hiobranquial larval e de sua musculatura associada para a família Hylodidae tem muitas semelhanças com a família Bufonidae, um táxon considerado aparentado

Dinâmica populacional de Zaprionus indianus Gupta 1970 (Diptera: Drosophilidae) e caracterização de alguns aspectos biológicos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Relação entre os atributos funcionais e características do habitat em comunidades de girinos

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Desenvolvimento de imunossensor baseado na imobilização de anticorpo monoclonal em fibroína da seda para diagnóstico rápido da cisticercose bovina

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Reprodução induzida e desenvolvimento inicial do Jundiá Leiarius marmoratus (PISCES: SILURIDAE)

Pós-graduação em Ciências Biológicas (Zoologia) - IBB

Influência do exercício prévio pesado na performance aeróbia de curta duração realizada com diferentes estratégias de distribuição da intensidade em indivíduos treinados e não treinados no ciclismo

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Crescimento e sobrevivência de espécies arbóreas em plantio de enriquecimento de mata ciliar em restauração

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

A sobrevivência das culturas como prescrição ética para o planejamento cultural: um estudo conceitual

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Do sonho à luta de sobrevivência na Amazônia: a caminhada das famílias camponesas do Projeto RECA

Pós-graduação em Ciências Sociais - FCLAR

Integrated multi-trophic culture of Nile tilapia (Oreochromis niloticus) and Amazon river prawn (Macrobrachium amazonicum) in brackish water

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Metodologias de pesquisa e avaliação da resistência de genótipos de amendoim a Spodoptera albula (walker, 1857) (Lepidoptera: Noctuidae)

Pós-graduação em Agronomia (Entomologia Agrícola) - FCAV

Efeito da alimentação do adulto na qualidade do endoparasitoide larval da broca comum da cana-de-açúcar

Aiming qualitative improvements in the mass rearing of Cotesia flavipes (Cameron, 1891) (Hymenoptera: Braconidae) in laboratory, tests were conducted with adults feed before parasitism on Diatraea saccharalis (Fabricius, 1794) (Lepidoptera: Crambidae) larvae, using 14 artificial diets based on sucrose, brewer yeast and honey. The design was completely randomized with 15 treatments and five replications. The biological parameters evaluated in F1 and F2 generations were: number of adults emerged; sex ratio; adult emergence percentage; weight of pupae mass; and male and female longevity. The highest average of emerged adults were 85 in diet with sucrose 5% for F1 generation, and 91 in diet with sucrose 5% + yeast brewer 2,5% for F2; the smaller average of adult emergency were 63.60 in diet with honey 5% + yeast brewer 2.5 % for F1 generation and 66.80 in diet with honey 5% for F2. Diets that produced more females were honey 5% + yeast brewer 2.5%, showing the sex ratio of 0.82 for F1 generation, and sucrose 10% + 2.5% yeast brewer 2.5% (0.75) for F2, while sucrose 10% + yeast brewer 2.5% (0.60 for F1) and honey 2.5% (0.59) provided fewer females for F2 generation. The highest percentage of adult emergence were 93.90% with the diet containing sucrose 2.5% + yeast brewer 2.5%) and 93.89 % with honey 5% + yeast brewer 2.5%, and the lowest 81.71% (honey 5% + yeast brewer 2.5%) for F1 and 78.96 % (honey 5%) to F1 and F2, respectively. The diet with Mel 2.5% produced greater weight of pupae mass. The adult longevity did not differ significantly for all diets in F1 and F2 generations. Diets containing 5% or 10% of sucrose or honey provide, in general, improve the qualitative development of C. flavipes in mass rearing.

Subdoses de glyphosate no desenvolvimento de espécies arbóreas nativas

Recovery of degraded areas aims to provide the degraded environment favorable conditions for restructuring in an environment that is unable to regenerate itself and planting of tree seedlings is one of the effective ways to extend this process. However, native tree species have slow growth rate which increases the seedlings production time as well as decreases their competitiveness with weeds in areas of forests deployment. The aim of this study was to evaluate the effects of glyphosate reduced rates application on Psidium cattleyanum (yellow guava), Citharexylum myrianthum (pau-viola) and Cedrela odorata (cedro) seedlings development by analyzing its morphophysiological parameters. The experiment was carried out in greenhouse conditions and the experimental units consisted of one plant were conducted in 2.5L plastic pots and arranged in a completely randomized design with six replications. Treatments consisted of glyphosate application at 0, 7.5, 15, 30 and 60 g ha(-1) using Scout (R) commercial formulation. Treatments application on these species seedlings was realized 120 days after seeds germination. Visual evaluations of plants phytotoxicity were realized at 7, 14 and 21 days after treatments application and plants survival, stomatal conductance, height, stem diameter and dry mass of shoots were evaluated 90 days after treatments application. Different doses of glyphosate did not cause plants phytotoxicity. Already, 30 and 60 g ha(-1) of glyphosate provided greater increases in height, stem diameter and dry mass of shoots for Citharexylum myrianthum and Psidium cattleyanum, respectively.

Bioactivity of Piper extracts on Tuta absoluta (Lepidoptera: Gelechiidae) in tomato

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)