1,720,963 research outputs found
Sulla presenza di 'ponti trasversali intrasinusoidali' nel fegato di Praomys. Studio ultrastrutturale
No full textShort Term Subcellular Changes in Bovine Pericardial Grafts Implanted in the Canine Right Ventricle of the Heart
No full textThe use of sonic frequencies as a clearing agent of specimens to be observed with scanning electron microscopy
No full textAbstract: The presence of mucus and/or cellular debris can obscure the fine morphology of the gastrointestinal or respiratory luminal surface, when observed by scanning electron microscopy. With the intent of obtaining a good cleaning of the mucosal surface without altering the ultrafine morphology of epithelial cells, a new model of sonicator/ultrasonicator is presented.
The instrument is supplied with a control system for wave frequency, amplitude and form, and permits a precise regulation of the wave energy. With this instrument it is possible to produce a ''cleaning effect'' by using any kind of frequency (either sonic or ultrasonic) and/or amplitude and/or waveform and/or liquid.
We report the application of sonic frequencies through water as a fluid for immersion to obtain a gentle and slow removing of mucus and in order to explore the possibility to clean hydrated tissues.
With the employment of sonic frequencies (from 5 to 15 kHz modulated by 200 Hz) and water as the immersion fluid, we were able to generate a gentle wave energy which effected an optimal removal of the mucus, with the consequent exposure of a well preserved epithelial surface of rat trachea and small intestine
Aspetti ultrastrutturali di biopsie miocardiche in pazienti affetti da pervietà interatriale
No full textAspetti rigenerativi dell'endocardio in patch-grafts di pericardio impiantati nel cuore di cane
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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
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