1,720,959 research outputs found
Determinazione di anticorpi specifici anti-Rickettsia conori
No full textThe authors tested by three methods Weil Felix serodiagnosis, C.M.F and ELISA, the sera of 32 patients with "fievre boutonneuse". For the latter two techniques, a specific antigen of R. conori was employed. The best results were obtained by the immune enzymatic assay
Influence of post partum on some haematological, biochemical and immunological parameters in Zerasca sheep
No full textDuring lactation the ewe is subject to intense variations of the
metabolic and immune status but the relative studies in sheep are
limited, especially in meat-type breed. This investigation aimed at
studying the changes of some haematological, biochemical and
immunological parameters in Zerasca ewes during this period.
The study, that represent a first step of a larger project, was carried
out on fifteen adult and clinically healthy Zerasca sheep, an
indigenous meat-type breed. The farm was located in Zeri (MS) at
an altitude of 900 meters a.s.l. Two blood samples were collected
from the jugular vein using Vacutainer® test tubes; the first within
four weeks from lambing and the second two months later. The
blood samples were analysed for RBC, WBC, Hgb, MCV, MCH,
MCHC, PCV, ALT, AST, BUN, cholesterol, total proteins, glucose,
triglycerides, creatinine, NEFA, BPI, cortisol, lysozyme, CD4+, and
CD8+. ANOVA was performed to test the overall significance of the
differences between mean values. The postpartum phase resulted
in exerting a significant effect upon the following parameters: ALT,
cholesterol, glucose, NEFA, creatinine, lymphocyte and lysozyme
(P<0.001), BUN and CD8 (P<0.05). Among these parameters,
some of them exceeded the normal range at the second sampling:
ALT, lysozyme and CD8+. NEFA decreased below the normal range
limit, probably in consequence of the lactation which evidently
represents a state of excessive catabolism. Lysozyme level was
higher in lactating ewes indicating a momentary enhancement of
the innate immunity. It can be noticed that the haematological
results showed no alteration and was not influenced by the physiological
state. The few available data do not allow to make conclusive
assessments but it is possible to assert that no considerable
changes in blood count, metabolic and immune systems of Zerasca sheep at this stage were observed
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
Changes in physiological and immunological parameters during the peripartum period in Zwerasca sheep
No full textThe aim of this study was to provide the picture of the dynamics of some blood parameters in the native Zerasca sheep breed during the peripartum period. Blood samples were collected from peripheral blood of 14 ewes at different times: from 21 d before lambing to 42 d after. Physiological and immunological parameters were evaluated: aspartate-aminotransferase, creatine kinase, lactate dehydrogenase, non-esterified fatty acids, total protein, total antioxidant capacity, free radicals, serum bactericidal activity and serum lysozyme. One-way repeated measures ANOVA test was performed. Results showed a significant influence of the peripartum and the deviation from the normal range on many parameters
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
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