1,720,985 research outputs found
Use of Hansensiaspora uvarum and managing growth conditions increase polysaccharides and antioxidants content in yeast autolysates for winemaking
Full text linkYeast derivatives are winemaking additives generally obtained from Saccharomyces spp., commonly used as fermentation and wine quality enhancers. Even though they are widely used, the production process - from initial biomass to their final composition, is not standardized and often not specific for winemaking purposes. In the present study, biomass production was performed by applying different temperatures and agitation conditions, to assess their effect on the chemical composition of the resulting derivatives, using S. cerevisiae and H. uvarum as starting microorganisms. The application of shaking mostly affected the chemical composition of yeast derivatives, resulting in the highest mean concentration of amino acids (146 mg/g in S. cerevisiae), polysaccharides (370 mg/g in H. uvarum), and glutathione (about 85 μmol/g in S. cerevisiae). Derivatives obtained from H. uvarum were characterized by a non-negligible amount of glutathione (35.6 μmol/g - 53.1 μmol/g) and cysteine (12.7 μmol/g - 26.2 μmol/g), regardless of the growth conditions previously applied; only for this strain, reducing proteins linked to cell wall residues were detected. The results obtained suggest that the chemical composition of yeast derivatives may be managed during biomass production, also using specific strains, thus possibly obtaining products naturally rich in compounds of enological interest
Composizione chimica ed evoluzione del profilo aromatico di spumanti Ribolla gialla prodotti con diversi metodi di rifermentazione
No full textEffect of body mass and physical activity at younger age on the risk of prostatic enlargement and erectile dysfunction: Results from the 2018 #Controllati survey
No full textObjective: Overweight and low physical activity (PA) increase the risk of prostatic enlargement and erectile dysfunction (ED). Less clear is the role of these factors at young age on the lifelong risk. Materials and methods: During June 2018 the Italian Society of Urologists organized the month of Male Urologic Prevention "#Controllati". Men aged 18 years or more were invited to attend urologic centers for a visit and counselling about urologic/andrologic conditions. Each participating man underwent a physical examination and was asked about urologic symptoms, sexual activity and possible related problems. Results: We analyzed data from 2786 men, aged 55.1 years (SD 10.9, range 19-97). A total of 710 (25.5%) subjects had a diagnosis of prostatic enlargement and 632 (22.7%) of DE. Overweight/obese men were at increased risk of prostatic enlargement and ED with corresponding odds ratio (0R) in comparison with normal or underweight men, being respectively 1.18 (95% Confidence Interval (CI) 1.00-1.44) and 1.69 (95% CI 1.39-2.05). The OR of prostatic enlargement in comparison with men reporting at age 25 a BMI < 25.0 was 1.22 (95% CI 1.01-1.51) for men with a BMI at 25 years of age ≥ 25; the corresponding OR value for ED was 1.17 (0.92- 1.48). Considering total PA at diagnosis, the OR of prostatic enlargement in comparison with no or low PA, was 0.69 (95%CI 0.55-0.86) for men reporting moderate PA and 0.75 (95%CI 0.58-0.98) for those reporting intense PA. When we considered PA at 25 years of age, the OR of subsequent diagnosis of prostatic enlargement, in comparison with men reporting no/low PA at 25 years of age was 0.81 (95%CI 0.63-1.04) for men reporting moderate PA and 0.70 (95%CI 0.52-0.99) for those reporting intense PA. Conclusions: These findings underline the utility of encouraging healthy lifestyle habits among young men in order to reduce the subsequent risk of prostatic enlargement and ED. © 2019 Edizioni Scripta Manent s.n.c.. All rights reserved
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
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