95 research outputs found

    Avaliação das condições de pré-tratamento alcalino do Eucalyptus.

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    Editores técnicos: Marcílio José Thomazini, Elenice Fritzsons, Patrícia Raquel Silva, Guilherme Schnell e Schuhli, Denise Jeton Cardoso, Luziane Franciscon. EVINCI. Resumos

    Análise do polimorfismo da região ITS do rDNA de Cylindrocarpon spp., agente causal do pé-preto da videira utilizando endonucleases.

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    o pé-preto da videira é uma doença caracterizada pelo declfnio e morte de plantas, causada pelo fungo Cylindrocarpon spp. A análise morfológica e molecular (marcadores RAPO) de isolados coIetados em videiras com sintomas de pé-preto na Região Sul do Brasil revelou grande variabilidade genética e resultou na identificação da espécie C. desfrucfans como agente causal da doença. Estudos moleculares recentes da região ITS de isolados coletados de diversos pafses e identificados como C. destructans sugerem que estes isolados sejam um complexo de várias espécies.Resumo

    Análise genética de acessos do banco ativo de germoplasma de pêra com a utilização de marcadores moleculares SSR.

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    A pêra é a terceira fruta mais produzida no mundo depois da uva e da maçã. O Brasil consome quase dez vezes mais do que produz, por isso toma-se um mercado bastante dependente de importações. Os marcadores SSR são Importantes para o estudo de poürnorfísmo em espécies vegetais possuindo vantagens como co-dominância e multialelismo.Resumo

    Effects of ultrasound on the performance improvement of wastewater microfiltration through a porous ceramic filter

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    Filtration under an ultrasonic field is a technique that is gaining importance in the wastewater treatment research field, not only due to its ability as a cleaning mechanism, but also as a filtration intensifier. The main objective of this research was the study of the influence of ultrasonic waves on the filtration of theoilfield wastewater (known as produced water) in order to increase the operation performance and filter medium regenerative effectiveness. A 0.016 m2 hollow cylindrical porous ceramic filter was submitted to the filtration of produced water by two mechanisms: conventional filtration under vacuum and filtration under theinfluence of ultrasonic waves. Experiments were carried out using synthetic produced water by analyzing the variables oil and grease content (O&G) and total suspended solids (TSS) for each filtration run. Backwashing of the filter medium with distilled water was also performed to evaluate the regeneration efficiency. During conventional filtration, permeate flux decreased gradually, becoming stable around 0.06 cm3.cm-2.s-1. Furthermore, in the filtration assisted by ultrasound, the permeate flux was around 0.15 cm3.cm-2.s-1. Therefore, ultrasonic waves provided an increase of about 150% in the permeate flux. Moreover, the sonication improved filter medium regeneration effectiveness, even under conditions of high TSS and O&G contents. Taking into consideration the very positive results associated with the application of ultrasonicwaves, this filtration technique is likely to become an important industrial process

    Condições para hidrólise enzimática de polpa celulósica e lodo de reciclagem de papel.

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    Editores técnicos: Marcílio José Thomazini, Elenice Fritzsons, Patrícia Raquel Silva, Guilherme Schnell e Schuhli, Denise Jeton Cardoso, Luziane Franciscon. EVINCI. Resumos

    COCCÍDEOS DO BRASIL —— V. COCCIDAE —— Ceroplastes (Octoceroplastes) hampeli Lizer, 1919

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    COCCÍDEOS DO BRASIL V. COCCIDAE Ceroplastes (Octoceroplastes) hampeli Lizer, 191
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