1,720,955 research outputs found
Coinoculação de fungos micorrízicos arbusculares e rizobactérias no crescimento de mudas de cultivares de oliveira (Olea europaea L.).
Get PDFA olivicultura brasileira se instituiu por volta do século XIX, nas regiões altas da Serra da Mantiqueira, Minas Gerais e, posteriormente, para o Sul do Brasil. Entretanto, o cultivo em escala comercial ainda não se estabeleceu, em virtude da falta de investimentos em estudos relacionados ao manejo do solo, mudanças climáticas, dificuldades de floração e frutificação da espécie e outros fatores que interferem, de forma direta, na produção desta cultura. Devido a esses aspectos, o país importa de países tradicionalmente produtores quase todo azeite e azeitona consumidos. Diante da necessidade de estudos alternativos relacionados à produção de mudas de oliveira, este trabalho teve como objetivo analisar o potencial biotecnológico da coinoculação de fungos micorrízicos arbusculares (FMA) e rizobactérias no crescimento de mudas, em condições controladas. Para isso, conduziram-se três experimentos simultaneamente, em delineamento inteiramente casualizado, esquema fatorial (3x3+1), sendo um para cada cultivar de oliveira (Arbequina, Maria da Fé e Grappolo 541), com 3 isolados de rizobactérias (Pseudomonas sp., Paenibacillus sp1. e Paenibacillus sp2.) Combinados com 3 espécies de FMAs (Acaulospora scrobiculata, Gigaspora rosea e Rhizophagus clarus) e um controle total (sem fungo e sem bactéria), com três repetições por tratamento, totalizando 90 unidades experimentais. Foram avaliados, após 12 meses de condução, a altura, diâmetro do caule, número de folhas, matéria fresca de raiz, matéria seca da parte aérea, teor e acúmulo de N e P, intensidade e porcentagem de colonização radicular, comprimento de micélio extrarradicular ativo e total e número de esporos. Os resultados foram analisados pelo teste de Skott e Knott e correlação de Pearson. Houve efeito da coinoculação para cada cultivar, sendo para a cultivar Arbequina maior produção de matéria seca na parte aérea e para a cultivar Maria da Fé acúmulos significativos de nitrogênio na parte aérea. Quanto aos fungos micorrízico sarbusculares, destacou-se Acaulospora scrobiculata para todas as cultivares. A análise de correlação de Pearson confirmou que o efeito no crescimento das mudas esteve diretamente relacionado com a formação de micorriza
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
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
Relação de fungos micorrízicos arbusculares e rizobactérias no crescimento de mudas de oliveira (Olea europaea)
Get PDFA number of factors influence olive tree productivity (Olea europaea L.), from climatic factors to proper management of the species. The efciency of using microbiological inputs, such as arbuscular mycorrhizal fungi and rhizobacteria, have been registered, mainly at the international literature. In Brazil, studies are still incipient. Therefore, the objective of this work was to analyze the effect of the co-inoculation of arbuscular mycorrhizal fungi and rhizobacteria on the growth of olive tree seedlings. Two experiments were conducted simultaneously in DIC, in a factorial scheme (3x3+1) by olive cultivar (Arbequina and Maria da Fé), three rhizobacterial isolates Pseudomonas sp, Paenibacillus sp1, and Paenibacillus sp2 were combined with three species of AMF (Acaulospora scrobiculata, Gigaspora rosea and Rhizophagus clarus) and a total control (without fungus and bacteria), with three replicates per treatment, totaling 60 experimental units. The height, diameter, number of leaves, fresh root matter, shoot dry matter, N and P content and accumulation, intensity and percentage of root colonization, active and total extrarradicular mycelium and the number of spores were evaluated after 12 months. There were differentiated results of treatments for each cultivar, showing that for some attributes, there was an isolated effect of FMA or co-inoculation of FMA and rhizobacteria, which provided signifcant increases on the growth and development of olive tree seedlings.Inúmeros fatores influenciam a produtividade da oliveira (Olea europaea L.), desde climáticos até o manejo adequado da espécie. A eficiência da utilização de insumos microbiológicos, como fungos micorrízicos arbusculares e rizobactérias, tem sido registrada, principalmente na literatura internacional. No Brasil, os estudos ainda são incipientes. Diante disso, o objetivo deste trabalho foi analisar o efeito da coinoculação de fungos micorrízicos arbusculares e rizobactérias no crescimento de mudas de cultivares de oliveira. Conduziram-se dois experimentos simultaneamente em DIC, em esquema fatorial (3x3+1) por cultivar de oliveira (Arbequina e Maria da Fé), sendo 3 isolados de rizobactérias (32, 42 e 48) combinados com 3 espécies de FMAs (Acaulospora scrobiculata, Gigaspora rosea e Rhizophagus clarus) e um controle total (sem fungo e sem bactéria), com três repetições por tratamento, totalizando 60 unidades experimentais. Foram avaliados, após 12 meses, a altura, diâmetro, número de folhas, matéria fresca de raiz, matéria seca da parte aérea, teor e acúmulo de N e P, intensidade e porcentagem colonização radicular, micélio extrarradicular ativo e total e número de esporos. Houve resultados diferenciados dos tratamentos para cada cultivar, constatando-se que, para alguns atributos houve efeito isolado do FMA ou da coinoculação de FMA e rizobactéria, que proporcionaram aumentos significativos no crescimento e desenvolvimento das mudas de cultivares de oliveira
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
- …
