1,721,054 research outputs found
Study reproductive phenology and characterization of guabijuzeiros fruits collected in different regions of Rio Grande do Sul
No full textO guabijuzeiro (Myrcianthes pungens (O. Berg) Legrand) é uma frutífera pertencente à família Myrtaceae com ocorrência em todas as formações florestais do Rio Grande do Sul e apresenta grande potencial para exploração de seus frutos devido às suas características nutricionais. No entanto, até o momento poucos estudos foram conduzidos com esta espécie. O objetivo deste trabalho foi estudar a fenologia reprodutiva, estimar a viabilidade polínica e caracterizar física e quimicamente os frutos de M. pungens de acessos coletados no Rio Grande do Sul. O estudo da fenologia reprodutiva foi realizado em três regiões (Nordeste, Noroeste e Metropolitana) entre os anos de 2014 e 2015. Para a estimativa da viabilidade do pólen e caracterização de frutos foram coletados botões florais e frutos (de duas safras) de diferentes acessos nos municípios de Bento Gonçalves, Guabiju, Paraí, Porto Alegre e Três Passos. Foram avaliadas dez flores por acesso e 1000 grãos por flor. Os frutos foram analisados, quanto a: massa fresca (MF), diâmetro longitudinal (DL) e diâmetro equatorial (DE), rendimento de polpa, sólidos solúveis (SS), acidez total (AT) e vitamina C. O ciclo reprodutivo variou entre as diferentes regiões: de 94 dias na região Noroeste (setembro a dezembro) a 147 dias na região Nordeste (setembro a fevereiro). A viabilidade média dos grãos de pólen foi de 94,9 %. Os resultados obtidos para MF e tamanho de frutos (DL e DE) indicam que estas características parecem estar relacionadas positivamente destacando-se a superioridade de alguns acessos, na primeira safra, G1 (MF=6,8 g; DL=19,4 mm; DE=22,3 mm) e na segunda safra, P1 (MF=4,9 g; DL=17,8 mm; DE=20,2 mm) e o BG2 (MF=4,8 g; DL=17,4 mm; DE=20,3 mm). O percentual de rendimento de polpa variou de 40,5 a 58,9 %. Quanto aos parâmetros químicos, também houve ampla variabilidade; as percentagens de SS variaram de 10,3 a 18,9 % (primeira safra) e 12,6 a 18,1 % (segunda safra) e a Vitamina C variou de 13,4 a 42,3 mg/100 g de polpa (primeira safra) e de 8,8 a 41,9 mg/100 g de polpa (segunda safra). Os frutos apresentaram baixa AT, média de 0,15 % na primeira safra e 0,18 % na segunda safra. Os resultados indicaram que existe variação na época de maturação dos frutos e na duração do ciclo reprodutivo conforme a região. As variabilidades na qualidade dos frutos entre os acessos avaliados permitiram identificar materiais com características agronômicas superiores e com elevada viabilidade polínica, os quais podem ser explorados como genitores em cruzamentos dirigidos em futuro programa de melhoramento genético.The guabijuzeiro (Myrcianthes pungens (O.Berg) Legrand) is a fruit belonging to the Myrtaceae family occurring in all forest formations of Rio Grande do Sul and has great potential for exploitation of its fruit due to its nutritional characteristics. However, few studies to date have been conducted with this species. The objective of this work was to study the reproductive phenology, estimating pollen viability and characterize physically and chemically the fruits of M. pungens in access of Rio Grande do Sul. The study of phenology was conducted in three regions of the state (Northeast, Northwest and Metropolitan) between 2014 and 2015. For the estimate of the viability of the pollen and characterization of fruits were collected floral buttons and fruit (from two crops) of different access in Bento Gonçalves, Guabiju, Paraí, Porto Alegre and Três Passos. Ten flowers were evaluated per access and 1000 grains per flower. The fruits were analyzed: fresh pasta (MF), longitudinal diameter (DL) and equatorial diameter (DE), pulp yield, total soluble solids (SS), total acidity (TA) and vitamin C. The reproductive cycle varied between different regions: 94 days in the northwest region (September to December) to 147 days in the northeast (September to February). The average viability of pollen grains was 94.9 %. The results obtained for MF and fruit size (DL, DE) indicate that these characteristics seem to be related positively highlighting the superiority of some access in the first season, G1 (MF=6,8g; DL=19,4mm; DE=22,3mm) and second crop, P1 (MF=4,9g; DL= 17,8mm; DE=20,2mm) and BG2 (MF=4,8 g; DL=17,4 mm; DE=20,3 mm). The pulp yield percentage ranged from 40,5% to 58,9%. As for chemical parameters, there was also wide variation among the accesses; percentages of SS varied from 10,3 to 18,9 % (first crop) and 12,6 to 18,1% (second crop) and the Vitamin C varied from 13,4 to 42,3 mg/100 g pulp (first crop) and 8,8 to 41,9 mg/100 g pulp (second harvest). The fruits showed low AT, average of 0,15 % in the first crop and 0,18 % in the second crop. The results indicate that there is variation in the time of fruit’s maturation and duration of the reproductive cycle according to the region. The variability in the quality of the fruits among the accesses detaches materials with superior agronomic characteristics compared to the others and with high pollen viability that could be explored as genitors in directed crossings in a future program of genetic improvement
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe 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
Full text link“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
Full text linkWe 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
Full text linkWe 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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
Author Under Sail The Imagination of Jack London, 1893-1902
No full textIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Intro -- Title Page -- Copyright Page -- Dedication -- Contents -- Acknowledgments -- Introduction -- 1. Spirit Truth -- 2. From Absorption to Theatricality and Back Again -- 3. "I Will Build a New Present" -- 4. Sons as Authors -- 5. Fathers as Publishers -- 6. The Daughter as Author -- 7. Lovers as Authors -- 8. At Sea with the Family -- 9. Yellow News, Yellow Stories -- 10. The Return Home -- Notes -- Bibliography -- Index -- About Jay WilliamsIn Author Under Sail, Jay Williams offers the first complete literary biography of Jack London as a professional writer engaged in the labor of writing. It examines the authorial imagination in London's work, the use of imagination in both his fiction and nonfiction, and the ways he defined imagination in the creative process in his business dealings with his publishers, editors, and agents. In this first volume of a two-volume biography, Williams traverses the years 1893 to 1902, from London's "Story of a Typhoon" to The People of the Abyss. The Jack London who emerges in the pages of Author Under Sail is a writer whose partnership with publishers, most notably his productive alliance with George Brett of Macmillan, was one of the most formative in American literary history. London pioneered many author models during the heyday of realism and naturalism, blurring the boundaries of these popular genres by focusing on absorption and theatricality and the representation of the seen and unseen. London created an impassioned, sincere, and extremely personal realism unlike that of other American writers of the time. Author Under Sail is a literary tour de force that reveals the full range of London as writer, creative citizen, and entrepreneur at the same time it sheds light on the maverick side of machine-age literature.Description based on publisher supplied metadata and other sources.Electronic reproduction. Ann Arbor, Michigan : ProQuest Ebook Central, YYYY. Available via World Wide Web. Access may be limited to ProQuest Ebook Central affiliated libraries
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