566 research outputs found

    Sexual maturity of Bothrops asper (Serpentes: Viperidae) from Costa Rica

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    Chemical Composition and Fermentation Profile of Perennial Peanut and Marandu Grass Mixed Silages

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    Perennial peanut has high quality, evidenced by the improvement of animal production in grazing, due to good contents of crude protein and digestibility, which makes it one of the best alternatives for low cost feeding (Paganella and Valls 2002). Grass ensilage associated with legumes is considered an alternative to meet the protein demand of cattle in the livestock. However, due to limited information on the techniques of grass ensilage with tropical legumes, this research aimed to evaluate the chemical composition and the fermentation profile of perennial peanut and Marandu mixed grass silages, treated or not with bacterial inoculant

    Early development of Moniliophthora perniciosa basidiomata and developmentally regulated genes

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    <p>Abstract</p> <p>Background</p> <p>The hemibiotrophic fungus <it>Moniliophthora perniciosa </it>is the causal agent of Witches' broom, a disease of <it>Theobroma cacao</it>. The pathogen life cycle ends with the production of basidiocarps in dead tissues of the infected host. This structure generates millions of basidiospores that reinfect young tissues of the same or other plants. A deeper understanding of the mechanisms underlying the sexual phase of this fungus may help develop chemical, biological or genetic strategies to control the disease.</p> <p>Results</p> <p>Mycelium was morphologically analyzed prior to emergence of basidiomata by stereomicroscopy, light microscopy and scanning electron microscopy. The morphological changes in the mycelium before fructification show a pattern similar to other members of the order <it>Agaricales</it>. Changes and appearance of hyphae forming a surface layer by fusion were correlated with primordia emergence. The stages of hyphal nodules, aggregation, initial primordium and differentiated primordium were detected. The morphological analysis also allowed conclusions on morphogenetic aspects. To analyze the genes involved in basidiomata development, the expression of some selected EST genes from a non-normalized cDNA library, representative of the fruiting stage <it>of M. perniciosa</it>, was evaluated. A macroarray analysis was performed with 192 selected clones and hybridized with two distinct RNA pools extracted from mycelium in different phases of basidiomata formation. This analysis showed two groups of up and down-regulated genes in primordial phases of mycelia. Hydrophobin coding, glucose transporter, Rho-GEF, Rheb, extensin precursor and cytochrome p450 monooxygenase genes were grouped among the up-regulated. In the down-regulated group relevant genes clustered coding calmodulin, lanosterol 14 alpha demethylase and PIM1. In addition, 12 genes with more detailed expression profiles were analyzed by RT-qPCR. One aegerolysin gene had a peak of expression in mycelium with primordia and a second in basidiomata, confirming their distinctiveness. The number of transcripts of the gene for plerototolysin B increased in reddish-pink mycelium and indicated an activation of the initial basidiomata production even at this culturing stage. Expression of the glucose transporter gene increased in mycelium after the stress, coinciding with a decrease of adenylate cyclase gene transcription. This indicated that nutrient uptake can be an important signal to trigger fruiting in this fungus.</p> <p>Conclusion</p> <p>The identification of genes with increased expression in this phase of the life cycle of <it>M. perniciosa </it>opens up new possibilities of controlling fungus spread as well as of genetic studies of biological processes that lead to basidiomycete fruiting. This is the first comparative morphologic study of the early development both <it>in vivo </it>and <it>in vitro </it>of <it>M. perniciosa </it>basidiomata and the first description of genes expressed at this stage of the fungal life cycle.</p

    Avaliação do desempenho sexual após cirurgias corretivas de genitália ambígua

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    This study evaluated the sexual performance of patients with genital ambiguity that had been submitted to corrective genitalsurgery. It was done a survey among the patients with genital ambiguity, undergone surgical correction, now aged 16 years oldor older and who had already initiated a sex life of a university clinic of intersexuality. Later, it was applied the Golombok RustInventory of Sexual Satisfaction (GRISS). Twenty patients who fulfilled the inclusion criteria: age older than or equal to 15 yearsold and submitted to surgical correction were selected. Of those, only four patients had begun their sex life. Several problemsrelating to sexuality were identified: Low frequency of relations, inappropriate sexual communication, sexual dissatisfaction,and sexual avoidance, lack of expression of sensuality, Vaginism and anorgasmia. Among those difficulties, the “low frequencyof relations” has been detected in all patients. It was detected that sexual function is altered in patients undergoing correctivegenital surgery. However, we can not say whether this is due to the basic pathology or if it is a sole consequence of the surgicalcorrection. This survey asks whether there is a negative effect resulting from corrective surgery of the genitalia, no sexual futureperformance of these patients. It questions also what the most propitious time to perform the surgery is: if in early childhoodor during adolescence.A ambiguidade genital atinge em torno de 1/20000 nascidos vivos na América Latina, e as repercussões psicossexuaisdesse evento ressaltam a necessidade de aprofundamento nesse tema. Este trabalho teve por objetivo avaliar odesempenho sexual de pacientes intersexuais com ambiguidade genital, submetidos à cirurgia genital corretiva.Participaram da pesquisa quinze pacientes femininas, portadoras de ambiguidade genital, submetidas à clitoroplastiaredutora, atualmente com idade igual ou superior a dezesseis anos, de um serviço universitário especializado emintersexualidade. Foi aplicado o GRISS, um questionário de avaliação da função sexual, às quatro pacientes que haviaminiciado vida sexual, das quinze pacientes contatadas. Foram notificados diversos problemas relativos à sexualidade.Todas as pacientes tinham pouca frequência do intercurso sexual e evitação sexual, e três delas expressaram falta deexpressão do desejo sexual e insatisfação sexual. Observou-se que a função sexual está alterada em pacientes submetidasà correção genital cirúrgica, porém não se pode afirmar se isso é consequência exclusiva da correção cirúrgica, ou decorrenteda patologia de base
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