1,720,964 research outputs found
HPLC-ELSD determination of Phospholipids and Lysophospholipids in Grana Cheese samples at different ripening stages
No full textChanges in phospholipids (PL) and lysophospholipids (lysoPL) content were studied in Grana Cheese samples, with a ripening age ranging from 4 to 36 months. The extracted lipid fraction was purified by SPE and then analyzed by HPLC coupled to an evaporative light scattering detector (ELSD). The PL amount was lower than usually reported for milk fat. Variability of samples at the same ripening stage was high, because cheese was produced in different factories, but it decreased towards the end of ripening. A continuous increase in PL and lysoPL was observed during the first 12 months of ripening. The main PL class was phosphatidylcholine; other PL detected were phosphatidylethanolamine, sphingomyelin, phosphatidylinositol and phosphatidylglycerol. An increase of the lysophosphatidylcholine fraction was observed starting from the 12th month of ripening time, while the lysophosphatidylethanolamine content was related to the ripening stage
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
Bioavailability of coated amoxicillin in pigs field experiences
No full textAmoxicillin, a -lactam antibiotic widely used in pigs, has a broad spectrum of action and bactericidal activity against the commo
n respiratory pathogens.
The aim of the present study was to identify the bioavailability and pharmacokinetic behaviour of two different formulations
of amoxicillin orally administered to pigs. A new premix for medicated feedstuff containing 10% of coated amoxicillin, was
developed using a hydrophobic matrix and was compared with a premix for medicated feedstuff containing 10% of not coated
amoxicillin. Two feed formulations medicated with 20 gr. of the two premixes for medicated feedstuff were administered to
8 pigs using a two period, two sequence crossover design with a 7 days washout period. Medicated feed was administered to
pigs as a single dose at 8 mg/kg b.w., and was rapidly and totally consumed.
Amoxicillin analyses in serum were performed by a sensitive high performance liquid chromatography (HPLC) method with
fluorometric detection, using an extraction procedure already described for edible tissues of fish and adapted and validated for
pig serum. The oral bioavailability of the formulation with coated amoxicillin was higher than the one of not coated amoxicilli
n and the area under the concentration-time curve (AUC) values was significantly different (P<0.05). Differences between
the mean maximum concentration (Cmax), time of Cmax (tmax) and mean residence time (MRT) of the drug formulations were
also statistically significant.
Coated amoxicillin is suitable for in-feed administration to pigs and, thanks to its higher oral bioavailability compared to the
not coated compound; it may be more effective for the treatment of susceptible infections. The bioavailability of the coated
formulation most probably is referred to a greater stability in acid environment compared to not coated amoxicillin. Furthermore
the protection of amoxicillin with a hydrophobic matrix matches with a reduced risk of cross-contamination and improves
safety of feed manufacturing
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
Evaluation of mercury, cadmium and lead levels in fish and fishery products imported by air in North Italy from extra-European Union Countries
No full textThe levels of cadmium (Cd), mercury (Hg) and lead (Pb) were evaluated in 251 samples of fish and fishery
products randomly collected between January 2010 and December 2013 from products imported through
the airport of Milan Malpensa from extra-European Union (extra-EU) Countries and inspected at the
Border Inspection Post by official public veterinarians. In this study, products were classified in four
categories: predatory fish (larger predatory fishes like tunafish and swordfish, and spiny dogfish), nonpredatory
fish (other species of fishes of lower dimensions and different feeding behavior, mollusc
(cephalopods and bivalves) and crustacean). Analyses were performed by accredited laboratory. All the
concentrations were below the levels expressed in Regulation (EC) No 1881/2006 except for two samples
of swordfish that exceeded in Hg content. Predatory fish had a significantly higher content of Hg (median
value 375 mg kg1) while mollusc had a significantly higher content of Cd (median value 66.5 mg kg1)
compared to the other groups of seafood included in this study. No relationship was found between the
individual concentration of metals
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
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