1,720,963 research outputs found
Application of an eradication protocol to Bovine viral Diarrhea (BVD) in large dairy cattle herds
No full textASSESSMENT OF MUCOSAL IMMUNITY TO BOHV-1, BRSV AND PI3V ELICITED BY ENDONASAL VACCINATION IN DAIRYCALVES WITH MATERNAL IMMUNITY
No full textApplicazione di diversi protocolli vaccinali per il controllo della Rinotracheite Infettiva del Bovino (IBR) in allevamenti bovini da latte
No full textLo studio, riferito al periodo 2000-2006, è mirato a fornire un quadro circa l’adozione di regimi di controllo diversi verso l’IBR,
in particolare della vaccinazione, in allevamenti da latte. I dati sieroepidemiologici relativi a 1.896 allevamenti non vaccinati
indicano come l’infezione da BoHV-1 sia ampiamente diffusa, coinvolgendo oltre il 50% degli allevamenti esaminati. La
vaccinazione è applicata in circa il 50% degli allevamenti. Tra le diverse tipologie vaccinali risultano largamente impiegati i vaccini
marker (43% degli allevamenti vaccinati) anche se i vaccini combinati continuano ad essere largamente rappresentati
(36% degli allevamenti vaccinati). Nel corso dell’azione di monitoraggio è emerso come gli allevamenti indenni non vaccinati
siano risultati esposti ad un alto rischio di infezione che in alcuni casi (11%) ha evocato gravi manifestazioni cliniche. Inoltre,
su 257 allevamenti che hanno intrapreso l’eradicazione a far tempo dal 1998, 95 (34%) hanno raggiunto l’obiettivo entro
il 2006. I dati nel loro complesso indicano che la vaccinazione appare altamente efficace nei riguardi della protezione verso la
malattia ma non altrettanto nel prevenire l’infezione
Entità e dinamica della risposta anticorpale indotta da differenti schemi vaccinali nei confronti di IBR e BVD
No full textIndagine preliminare sull’immunità passiva trasmessa ai vitelli da latte e correlazione con la diarrea neonatale e perinatale.
No full textEffects of oral caffeine administration to sows with induced parturition on hypoxia in piglets
No full textTo counteract the effects of perinatal hypoxia in piglets, the oral administration of caffeine to sows with induced parturition was evaluated. On day 113 of gestation 9 sows received
27 mg/kg body weight (BW) of caffeine mixed with 200 g of standard diet. The same amount of feed without the addition of caffeine was administered to 9 control sows.
Additionally, on day 113 of gestation, all sows were treated by two injections in the perianal area of 1 mg of alfaprostol (at 8:00 am and 14:00 pm), and on the morning of
farrowing by 14 IU of oxytocin in the perianal area. Caffeine did not affect BW of piglets and size of litters; however piglets from treated sows showed a higher capacity to adapt to
extra-uterine life. Particularly, they showed a greater thermoregulatory ability (P7 compared to piglets from control sows (92%
vs. 75%, respectively; P<0.030). Caffeine furthermore reduced the frequency of high serum biopterin values (480 nmol/L) in piglets born from treated sows (P<0.001).
In conclusion, the caffeine orally administered to sows with induced parturition showed a protective effect on the consequences of neonatal hypoxia in tissue ischemia–reperfusion
injury in piglets
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
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