1,721,159 research outputs found
Dye detoxification by Lentinula edodes INCQS 40220 | Detoxificação de corante por Lentinula edodes INCQS 40220
Get PDFLentinula edodes belongs to the group of fungi known as ligninolytic fungi, due to its ability to degrade the aromatic structure of the lignin. Textile dyes also have aromatic structure, and after microbial degradation, some of them can be transformed into toxic compounds, when compared to the original structure, representing risk to environment and human health. Therefore, the potential of the fungus L. edodes INCQS 40220 to decolorize and to detoxify reactive red 198 (azo dye), reactive blue 214 (azo dye) and reactive blue 21 (cooper phthalocyanine dye) in a mixture (MXD), was evaluated. After 14 days of incubation, total decolorization in liquid media was obtained. The fungal treatment of MXD did not present toxic effects towards blood human cells. The genotoxicity of MXD, assessed by Comet assay, was efficiently reduced to 61% and in the Ames test presented negative response for mutagenicity for Salmonella enterica serovar Typhimurium TA97, TA98, TA100 and TA102 strains. The results indicated L. edodes INCQS 40220 efficiency on decolorization and genotoxicity reduction of a mixture of different dyes. Therefore, based on these results, obtained under laboratory conditions, L. edodes INCQS 40220 has potential for textile effluent treatment.
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Lentinula edodes pertence ao grupo de fungos conhecidos como fungos ligninolíticos, devido a sua habilidade de degradar estruturas aromáticas da lignina. Corantes têxteis também possuem estruturas aromáticas e, após a degradação microbiana, alguns destes corantes podem ser transformados em compostos tóxicos quando comparados à estrutura original, representando risco à saúde ambiental e humana. Portanto, o potencial do fungo L. edodes INCQS 40220 para descolorir e detoxificar a mistura de vermelho reativo 198 (corante azo), azul reativo 214 (corante azo) e azul reativo 21 (corante ftalocianina de cobre) foi avaliada (MXD). Após 14 dias de incubação, foi obtida descoloração total em meio líquido. O tratamento fúngico de MXD não apresentou efeitos tóxicos em células sanguíneas humanas. A genotoxicidade de MXD, avaliada por meio do Ensaio Cometa, foi eficientemente reduzida para 61% e, no teste de Ames, apresentou resposta negativa à mutagenicidade para Salmonella enterica serovar Typhimurium TA97, TA98, TA100 e TA102 strains. Os resultados indicaram eficiência de L. edodes INCQS 40220 na descoloração e redução de genotoxicidade na mistura de diferentes corantes. Portanto, com base nos resultados obtidos em condições de laboratório, L. edodes INCQS 40220 tem potencial para o tratamento de efluente têxtil
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Get PDF“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Get PDFWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
Nivel de Conocimientos, Actitudes y Prácticas sobre Sexualidad en Adolescentes de 5to Año de Secundaria de la Institución Educativa 40220 Héroes del Cenepa del Distrito de Paucarpata, Octubre - Diciembre 2018
No full textObjetivo: Determinar el nivel de conocimiento las actitudes y las prácticas sobre sexualidad en
adolescentes de 5to de secundaria de la Institución Educativa 40220 Héroes del Cenepa del
distrito de Paucarpata.
Material y Métodos: El presente estudio fue de campo, descriptivo y transversal. Se aplicó
encuestas sobre conocimientos, actitudes y prácticas sobre sexualidad con previo
consentimiento informado. La población estuvo conformada por 100 estudiantes de 5to de
secundaria de la Institución Educativa 40220 Héroes del Cenepa que cumplieron los criterios
de inclusión. Los datos fueron recolectados calificados, sistematizados, interpretados y
analizados. Los resultados se presentaron en tablas y gráficos.
Resultados: El 94% de los adolescentes presentaron un nivel alto de conocimiento sobre
sexualidad, el 95% presentó una actitud favorable y el 27% iniciaron su vida sexual.
Conclusiones: El nivel de conocimiento de los adolescentes sobre sexualidad es alto, la actitud
que toma el adolescente en su sexualidad es favorable y en la práctica sexual los adolescentes
afirmaron tener relaciones sexuales con predominio masculino en los alumnos de la Institución
Educativa Héroes del Cenepa 40220.
Palabras claves: Sexualidad en Adolescentes.Tesi
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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