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FMRFamide-like immunoreactivity in the sea-fan Eunicella cavolini (Cnidaria: Octocorallia)
No full textThe presence of FMRFamide-related peptides (FaRPs) was investigated, by immunohistochemical methods with a polyclonal FMRFamide antiserum, in the sea-fan Eunicella cavolini (Van Koch 1887), a representative of the cnidarians (octocorallians). The identification of FaRP-immunoreactive elements as neuronal cells and a nerve net was performed by double immunohistochemical methods with the monoclonal anti-beta-tubulin antibody. A strong and widely distributed FaRPs immunoreactivity was detected: FaRPs-immunoreactive nerve cells were observed among and underlying gastrodermal epithelial cells, epidermal cells lining tentacles, muscular septs and gonophores. A diffuse FaRPs-immunoreactive nerve net was also found between epithelia and mesoglea and in the stalk of the gonophore. These results improve our knowledge of the gorgonian nervous system and demonstrate that most of the immunoreactive cells belong to neural elements
FMRFAMIDE-LIKE IMMUNOREACTIVITY IN THE SEA-FAN EUNICELLA CAVOLINI (CNIDARIA: OCTOCORALLIA).
No full textThe presence of FMRFamide-related peptides (FaRPs) was investigated, by immunohistochemical methods with a polyclonal FMRFamide antiserum, in the sea-fan Eunicella cavolini (Van Koch 1887), a representative of the cnidarians (octocorallians). The identification of FaRP-immunoreactive elements as neuronal cells and a nerve net was performed by double immunohistochemical methods with the monoclonal anti-beta-tubulin antibody. A strong and widely distributed FaRPs immunoreactivity was detected: FaRPs-immunoreactive nerve cells were observed among and underlying gastrodermal epithelial cells, epidermal cells lining tentacles, muscular septs and gonophores. A diffuse FaRPs-immunoreactive nerve net was also found between epithelia and mesoglea and in the stalk of the gonophore. These results improve our knowledge of the gorgonian nervous system and demonstrate that most of the immunoreactive cells belong to neural elements
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
First observation on the electrosensory and olfactory system in the basking shark Cetorhinus maximus
No full textVariations 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
Distribution of FMRFamide-like immunoreactivity in the alimentary tract and hindgut ganglia of the barnacle Balanus amphitrite (Cirripedia, Crustacea)
No full textIn this study, the presence and distribution of FMRFamide-like immunoreactivity in the alimentary tract of barnacle Balanus amphitrite were investigated. A net of nerve fibers strongly immunoreactive to FMRFamide-like molecules was localized in the posterior midgut and hindgut. Positive varicose nerve terminals were also localized close to the circular muscle cells and, in the hindgut, close to the radial muscular fibers. Besides this nerve fibers network, one pair of contralateral ganglia was localized in the hindgut, each of them constituted by two strongly FMRFamide-labeled neurons and one nonlabeled neuron. Their immunoreactive axons directed toward the hindgut and posterior midgut suggest an involvement of FMRFamide-like substances in adult B. amphitrite gut motility. The hindgut associated ganglia of barnacles seem to correspond to the terminal abdominal ganglia of the other crustaceans. Since they are the only residual gut ganglia in the barnacle's reduced nervous system, we can hypothesize that gut motility needs a nervous system regulation partially independent of the central nervous system
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