Sonification
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Soil conservation management with cover crops: effects on critical energy levels, release and dispersion of aggregates
ABSTRACT The normalized dispersion index (NDI) and the b/a index are commonly used to express the stability of aggregates measured by ultrasound. However, few studies have used the critical energy (CE) extracted from modeling to explain the effects of soil use and management on soil aggregation. The objective of this study was to evaluate the influence of so
Bragantia. Publicado em: 05/08/2019
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2. Avaliacoes da infeccao de explantes de feijoeiro por Agrobacterium tumefaciens por meio de microscopia.
Phaseolus vulgaris L. e considerada recalcitrante a transformacao por Agrobacterium tumefaciens. Contudo, alteracoes no meio de co-cultivo, utilizacao de linhagens hipervirulentas de Agrobacterium e de vetores binarios contendo genes vir demostraram que o feijoeiro e susceptivel a essa bacteria. O objetivo do presente trabalho foi estudar o efeito da sonific
Planaltina: Embrapa Cerrados. Publicado em: 2011
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3. Os sons e as cores: propostas de correlação em experiências composicionais.
Esse trabalho trata das relações entre cores e sons, e seu uso no processo composicional. São utilizados como referência a abordagem de Jorge Antunes (1982), que relaciona sons e cores pelas suas frequências em proporção, e propostas de diversos autores ligados à área da sonificação. No capítulo inicial, serão expostas noções preliminares de t
Publicado em: 2010
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4. Determinação de fósforo biodisponível em rações de peixes utilizando extração assistida por ultra-som e espectrofotometria no visível
The aim of the present work was to develop and optimize a method for determination of bioavailable phosphorus in samples of feces and fish feed using ultrasound extraction and subsequent quantification by visible spectrophotometry. Using as extractor solution HNO3 0.50 mol L-1, the great conditions of extraction established were: sample mass - 100 mg, sample
Química Nova. Publicado em: 2009
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5. Ondas ultrassônicas e pérolas de vidro: um novo método de extração de beta-galactosidase para uso em laboratório
The optimization of a traditional technique of cellular disruption by abrasion was carried out and a process using ultrasonic waves associated with glass pearls to extract beta-galactosidase from Kluyveromyces marxianus proposed. In the first case, the effects of the diameter and weight of the pearls in relation to the volume of cellular suspension and amoun
Química Nova. Publicado em: 2008
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6. Addition and evaluation of sonorous stimulus as tool to support data visual exploration / Adição e avaliação de estímulos sonoros como ferramenta de apoio à exploração visual de dados
Visualization is a generic process that uses visual and interactive representations to easy the analysis and the understanding of complex datasets. To this date, most of the visualization toolkits make use almost exclusively of visual aid to represent information, which has limited the capacity for data presentation and exploration. Many studies have shown t
Publicado em: 2007
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7. Comparison of three dispersion procedures for quantitative recovery of cultivable species of subgingival spirochetes.
Spirochetes are usually the predominant organisms observed microscopically in subgingival plaques removed from tooth sites associated with periodontitis, but these organisms are rarely isolated by cultural means, presumably because the media do not support their growth and/or because these fragile organisms are disrupted by the various procedures used to dis
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8. Analysis of ion distribution in subcellular myocardial particulates separated by density gradient centrifugation with nonpolar liquid under ion immobilization conditions.
Methods have been developed for the measurement of the Ca and Mg contents of subcellular particulates, separated by nonpolar liquid density gradient ultracentrifugation. After rapid deep freezing and removal of water by freeze-drying the frozen crushed tissue, homogenization and sonification a nonpolar liquid were carried out. Application of this technique h
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9. Histamine Release in the Dog After Leukocyte Lysate Injection
Mixed leukocyte suspensions, containing 106 leukocytes per ml, were prepared from dog peripheral blood by dextran sedimentation. Lysates of these suspensions, prepared by sonification, were administered intravenously to the autologous dogs. The plasma histamine levels were increased to an average value 320% above the control values (P < 0.001). The individua
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10. Detection of group B streptococcal antibodies in human sera by radioimmunoassay: concentrations of type-specific antibodies in sera of adults and infants infected with group B streptococci.
Current interest in determining the possible protective role of antibodies against group B streptococcal disease prompted this study of the feasibility of using a radioimmunoassay to measure type-specific immunity in humans. The radioimmunoassay was standardized as a quantitative test for antibodies against the carbohydrate (CHO) antigens of all five group B
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11. Inhibition of ecological emergence of mutans streptococci naturally transmitted between rats and consequent caries inhibition by Streptococcus salivarius TOVE-R infection.
The ability of Streptococcus salivarius strain TOVE-R to inhibit the ecological emergence of virulent representatives of the most prevalent human mutans streptococci on the teeth of specific pathogen-free Osborne-Mendel rats was studied. Rats which were infected by TOVE-R, or either S. mutans 10449S or S. sobrinus 6715-13WT, or uninfected were transiently co
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12. Direct detection of influenza virus antigen in nasopharyngeal specimens by direct enzyme immunoassay in comparison with quantitating virus shedding.
We developed a direct enzyme immunoassay [EIA; Enzygnost Influenza A(Ag) and Enzygnost Influenza B(Ag)] for the direct detection of influenza A and B virus antigens in nasopharyngeal secretion specimens (NPS). The test is performed without sonification of specimens, and results are obtained within 4 h. A direct comparison between direct EIA and quantitation