1,720,977 research outputs found
Effect of dried or green forage on vaccenic and conjugated linoleic acid production during in vitro rumen fermentation
No full textEffect of dried or green forage on vaccenic and conjugated linoleic acid production during in vitro rumen fermentatio
Effetti dovuti all’integrazione con acido oleico e linoleico coniugato nella dieta di polli sulla qualità della carne
No full textQualità della carne di pollo integrata con acido oleico e linoleico coniugat
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
[Treatment of fibrocystic breast disease with danazol. A multicenter study]. FT Trattamento della mastopatia fibrocistica con danazolo. Studio multicentrico.
No full textEffect of dried or green herbage on vaccenic acid and conjugated linoleic acid production during in vitro rumen fermentation
No full textSamples of two diets with the same forage/concentrate ratio (60/40 DM) and characterized by the presence of dried herbage (Diet D) or green herbage (Diet G), obtained from the same natural pasture and Lucerne (Medicago sativa), were incubated in vitro with rumen fluid with the aim of monitoring the concentration of cis and trans C18:1 fatty acids and of rumenic acid (RA) with fermentation time. More vaccenic acid (VA) and less RA were produced with Diet G than with Diet D. In particular, the biohydrogenation of unsatured fatty acid (UFA) showed a lower rate with Diet D than with Diet G. Moreover, for Diet G, the highest content of VA was reached as a simultaneous contribution of the direct hydrogenation of RA and linonenic acid (LNA), as reaction intermediate. The presence of green or dried herbage in the diets modified the profile of C18:1 isomers produced during rumen fermentations. In particular cis12, trans12 and cis13 isomers percentages were enhanced by the presence of fresh herbage in the diets while cis11 C18:1 increased with hay
Development of geometrical and positional isomers content of conjugated linoleic acid (CLA) and C18:1 fatty acids in rumen fluid during in vitro fermentation
No full textUpgrading the lipid fraction of foods of animal origin by dietary means: rumen activity and presence of trans fatty acids and CLA in milk and meat
No full textThe recent literature dealing with the effect of the diet on the quality of milk and meat fat is reviewed. Some aspects of the rumen metabolism of lipids are dealt with: lipolysis, bio-hydrogenation, synthesis of microbial fatty acids and inhibition
mechanisms on fermentation. Firstly, the influence of forage is considered. Pasture is the best forage, better if high
hill pasture, as compared to hay and silage: short chain fatty acids (SCFA) (shorter than C10) are increased, medium
chain fatty acids (MCFA) (C12 through C16) are decreased, oleic (OA), linoleic (LA) and linolenic (LNA) acids are increased
and so are the conjugated linoleic acid pool of isomers (CLA) and n-3 polyunsaturated fatty acids (n-3 PUFA). Secondly,
the energy supplementation of diets with fats is looked at. Animal fats depress milk yield and SCFA, while OA is increased
because of the enhanced activity of mammary Δ9 desaturase. Fish oil depresses milk yield as well, but promotes CLA and
n-3 PUFA. If animal fats are protected against rumen bacteria, milk yield and milk fat depression are avoided. Vegetable
fats are richer in unsaturated fatty acids (UFA), thus more susceptible to the rumen bio-hydrogenation. As calcium soaps
or inside whole seeds, plant fats are protected and CLA is increased. CLA is an important component of fat. In ruminants
it comes from the desaturation of vaccenic acid (VA) both in rumen and udder; and the yield of VA depends on the diet
quality. In conclusion, simple directions are given on how to improve the quality of animal fat by dietary means, without
affecting yield
- …
