1,720,957 research outputs found
Problemi giuridici inerenti alla segnalazione di cecità notturna congenita non progressiva (congenital stationary night blindess – CSNB) nel cavallo Appaloosa in Italia
No full textZygomatic gland adenoma in a dog : histochemical and immunohistochemical evaluation
No full textOrbital epithelial tumors in dogs are rare and most frequently malignant. Distinguishing their origin from the lacrimal or zygomatic gland is often challenging and is based mostly on tumor location. A case of adenoma involving the orbit in a 13-year-old, female, standard Schnauzer is reported. Histologically, the neoplasm was characterized by nests and cords of epithelial cells mostly forming small glandular structures. The origin of the tumor from the zygomatic gland was determined by histochemical characteristics (alcian blue pH 1 positive staining) of a small remnant of normal gland included within the tumor capsule. The benign nature of our finding was confirmed by follow-up information: 2 years after complete surgical removal of the mass no tumor recurrence or metastases was recorded
p53 protein expression in conjunctival squamous cell carcinomas of domestic animals
No full textThe expression of p53 protein wasinvestigated in eight formalin-fixed, paraffin-embedded conjunctival squamous cell carcinomas offive horses and one cow, dog and cat each by immunohistochemical procedure in order to evaluate proteinoverexpression. Anti-human p53 protein mouse monoclonal antibodies known to be cross-reactive with p53 protein of Ahed the animal species examined were used. Positive p53 nuclear immunostaining was detected BChheedd infive equine, onebovine and one feline cases.Conversely, no p53 immunostaining was found in the only canine case examined. These results demonstrate a frequent p53 overexpression in conjunctival squamous cell carcinoma that could be related to UV- ker induced mutations of the p53 tumor suppressor gene
Pathological and clinical evaluation on broilers with ipovision and cornealopacification
No full textNegative dazzle reflex and optic neuropathy due to chronic glaucoma in a chinchilla: clinical evaluation and correlation with pathological findings
No full textPurpose: The clinical evaluation of cranial nerve II func- tion in the chinchilla is challenging. It has been reported that the dazzle reflex is absent in the majority of normal chinchillas. The dazzle reflex was evaluated in a case of chronic unilateral glaucoma in a chinchilla and in normal controls to assess its usefulness in assessing visual path- ways disease.
Methods: The left buphthalmic globe of a 2.5 years old female chinchilla was evaluated clinically and ultrasono- graphically (12 MHz linear probe; B mode). Dazzle reflex was tested in both eyes of the patient and in 11 normal chinchillas with Heine otoscope and slit lamp light at dif- ferent brightness, in light and dark adaptation, and pre- and post-pharmacological mydriasis. Following worsening of the uveitis the affected eye was enucleated and histology was performed.
Results: Dazzle reflex was negative in the glaucomatous eye. The enlarged hypotonic (IOP OS 4, OD 14 mmHg) globe had anterior uveitis with anteriorly dislocated cata- ractous lens, following lens capsule rupture, and optic nerve atrophy. Ultrasonography confirmed the lesions. Histologically, zonal neutrophilic and macrophagic uveitis with sparse granulocytes within the cataractous lens, full thickness retinal atrophy and optic nerve spongiosis and gli- osis were confirmed. In all 23 normal eyes, dazzle reflexes were positive when tested in dark adapted, pharmacologi- cally dilated pupils.
Conclusions: Since the dazzle reflex was evoked in all the normal eyes, its absence in the glaucomatous eye was sug- gestive of optic nerve atrophy as suspected during ophthal- moscopy. Dazzle reflex can be useful in the evaluation of chinchillas’ visual pathways
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
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