1,720,959 research outputs found
Bioactive contents and nutritional indexes of organic eggs laid from Ancona hens.
No full textIn spring 2009, bioactive contents, nutritional indexes and oxidative stability of eggs from different productive chains (Conventional, Organicand Organic-plus) were compared. The trial were performed in two farms: conventional (100.000 caged Brown Hy-line hens, 0,75 m2/hen)and organic (18.000 Brown Hy-line hens; indoor: 6 hen/m2 provided with 4 m2 pasture/hen) groups, whereas the Organic-Plus group (500Ancona hens) had a larger grass paddock (indoor: 6 hen/m2 provided with 10 m2/hen). The following egg characteristics were analysed: vitamin E, carotenoids, polyphenols, lipids and fatty acid profile, cholesteroland TBARs contents. Moreover were calculated many nutritional indexesas: atherogenicity (AI), thrombogenicity (TI), peroxidability (PI), theindex of nutritional quality (INQ) and the ratio between hypocholesterolaemicand hypercholesterolemic fatty acids (HH). Egg quality was affected by the pasture available. The hens that ingested grass (Organic-Plus), produced eggs with higher vitamin E, carotenoids, polyphenols, TBARs contents and PI, but lower AI and TI. The HH index was similarin all types of analyzed eggs. Organic eggs showed an intermediate trend between Conventional and Organic-plus ones in relation to n-6/n-3 and linoleic/linolenic acid ratios. Bio-Plus eggs reached values of n-3 total egg equivalent to 409,06 mg. Cholesterol levels were consistent with those found in literature with variations mainly due to genetic typeand rearing system. The egg quality was mainly affected by the pasture availability since hens which ingested more grass (Organic-plus) producedeggs with higher amount of α-tocopherol, carotenoids and n-3 fatty acids, but with worst oxidative stability.[...
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
Assessment of a global positioning system to evaluate activities of organic chickens at pasture
No full texthe aims of the present study were to assess the use of a global positioning system (GPS) monitoring device to evaluate the activities of organic chickens at pasture. Two hundred male birds from 2 strains (100 slow-growing and 100 fast-growing birds) were reared separately in 4 indoor pens (0.10 m2/bird), each with access to a grass paddock (10 m2/bird; 2 replications/genotype). During the last week of age (from 73 to 80 d of age), the kinetic activity of chickens was monitored by behavioral observations (n = 20; focal bird sampling method) and a GPS (n = 10; Super Trackstick, Atex International, Route d’Esch, Luxembourg) equipped with a universal serial bus port for quick viewing on Google Earth’s 3-D model, giving information concerning the date, hour, environmental conditions, and coordinates of monitored birds. Based on the focal bird sampling method, fast-growing birds tended to stay indoors rather than forage in the pasture, whereas slow-growing birds spent more time outdoors (P < 0.05). Moreover, visual observations confirmed GPS records, whereas slow-growing birds were observed to perform more active behaviors, stand less, and spend more time outdoors than indoors. Based on GPS tracks, slow-growing chickens covered an average daily distance of 1,230 m, whereas fast-growing birds covered only 125 m. In conclusion, GPS appears to be a suitable way to evaluate the kinetic activity of chickens. We also concluded that locomotor activity, which requires a high energy consumption, is low in fast-growing birds compared with slow-growing ones, allowing the fast-growing birds to reallocate energy to productive traits
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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