1,720,990 research outputs found
Intestinal Microbiota in IgE-mediated Cow’s Milk Allergy: microbial dysbiosis and possible modulation through probiotics
Full text linkObjectives and study: The aim of the study was to evaluate gut microbiota (GM) in infants with cow milk allergy (CMA) compared to food-sensitized and healthy infants. Furthermore, we investigated colonization, persistence and possible effects of a probiotic mixture (B. breve M-16V (BB), B. longum subsp. longum BB536 (BL) and B. longum subsp. infantis M-63 (BI)) in the GM of allergic infants.
Methods: We enrolled a total of 40 infants aged 10 to 15 months: 14 CMA patients (Group1); 12 positive IgE and negative food challenge patients (Group2); 14 healthy infants (Group3). For each patient, a stool sample was collected at enrolment (T 0 ). Group1 received probiotic twice per day (3.5×109 UFC/dose) for 30 days. Stool samples, collected at T 1 (7 days from probiotic intake), T2 (30 days from probiotic intake) and T 3 (after 60 day from probiotic discontinuation), were analysed
by real-time PCR. The GM profile of groups was characterized by 16S rRNA targeted metagenomics. Data were analysed by QIIME and IBM SPSS Statistic software.
Results: At baseline, BB and BL were present in the GM in the three Groups without significant differences. At T 0 , BI median concentration value was 0 in all the three groups, while after probiotics administration, RT-PCR analysis revealed a significant increase, from 0 to 6.4 x 10 1 molecules/l at T 1 (p=0.003) and 1.6 x 10 2 molecules/l at T 2 (p=0.005) with a decreased to 4.56 x 10 1 molecules/l at T 3. From basal microbiota comparison, we demonstrated that allergic patients clustered in Beta-
diversity analysis (PERMANOVA test (p=0.019)) and showed a peculiar phylogenetic relatedness.
At phylum level, Verrucomicrobia were higher in healthy group and gradually decreased from Group2 to Group1 (pFDR<0.05). Firmicutes resulted more abundant in Group2 and lower in Group3, while Group1 showed an intermediate level (pFDR<0.05).
At genus level, Haemophilus, Actinobacillus, Prevotella and Streptococcus resulted associated to allergy, with a significant increase (p<0.05) in Group1 and less in Group2 compared to Group3. Klebsiella showed a higher abundance in Group1 but not in Group2 compared to Group3.
Parabacteroides and Granulicatella were instead more abundant in Group3. During probiotic intake, there was an increase of Verrucomicrobia with a peak of abundance at T 2. Proteobacteria showed a gradually increase during probiotic intake and this increment was maintained also at T 3 . On the contrary, Actinobacteria decreased during the time-course, even if there was an increase form point T 1 to point T 2 . At genus level, probiotic intake determined an increase of Akkermansia, Prevotella and Ruminococcus. Actinomyces, Enterococcus, Streptococcus and Sutterella resulted instead diminished after probiotic intervention. Blautia increased during all the period of probiotic intake, until T 2 point, while at T 3 it started to decrease and showed a level of abundances lower than T 0 .
Conclusion: GM of CMA infants is different from that of sensitized and healthy infants and BI can colonize and persist in CMA GM. Probiotic administration provoked an increase of anti-inflammatory and a decrease of pro-inflammatory bacteria. In conclusions, early infancy is a window during which gut microbiota may shape food allergy outcomes in childhood and probiotics could be a rational way to modulate it
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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