1,721,094 research outputs found
Steady state fluorescence anisotropy and multifrequency phase fluorometry on oxidized phosphatidylcholine vesicles.
No full textVarianti testuali di Pescatore: da Marco Negri a Pierangelo Bertoli (e oltre)
No full textIl contributo propone l’esame delle varianti testuali di Pescatore, brano musicale composto nel 1980 da Marco Negri in collaborazione con Pierangelo Bertoli e portato al successo dallo stesso Pierangelo Bertoli in duetto con Fiorella Mannoia, dalla sua genesi alle riscritture e riprese dei decenni successivi.The article proposes the examination of the textual variants of Pescatore, a musical piece composed in 1980 by Marco Negri in collaboration with Pierangelo Bertoli and brought to success by Pierangelo Bertoli himself in a duet with Fiorella Man-noia, from its genesis to the rewritings and revivals of the subsequent decades
Differential scanning calorimetry characterization of oxidized egg phosphatidylcholine liposomes.
No full textDefenses against oxidative stress in the Antarctic scallop Adamussium colbecki and effects of acute exposure to metals
No full textSince a general pathway of toxicity induced by pollutants is the enhancement of reactive oxygen species, biochemical
responses associated with variations in the antioxidant cellular system have been often proposed as biomarkers of pollutantmediated
toxicity associated with oxidative stress. Antarctic organisms live in an extreme environment characterized by low water
temperature, high level of dissolved oxygen, presence of ice and strong seasonal changes in light intensity and availability of food,
conditions which could influence both the formation of reactive oxygen species and the mechanisms for their removal. In this
respect and considering the utility of this as a key species for monitoring marine Antarctic environment it was of interest to
investigate the antioxidant defense system of the scallop Adamussium colbecki.
The parameters examined in the digestive gland of the scallop were the concentration of glutathione and the activity of several
glutathione dependent and antioxidant enzymes (glyoxalase I and II, glutathione S-transferases, glutathione peroxidases, glutathione
reductase, catalase, superoxide dismutase). Very high levels of catalase suggest a possible adaptation to Antarctic extreme
conditions, while the high activities of glutathione S-transferases are more probably related to the feeding behavior of Pectinids.
Enzymes from Adamussium colbecki generally appeared to be active at low temperatures but, with a few exceptions, their activities
increased with rising temperature. Exposure of A. colbecki to sublethal concentrations of Cu or Hg resulted in a significant
reduction in the levels of total glutathione and in the activity of catalase and glutathione S-transferases. Antioxidant responses of A.
colbecki could represent a useful tool in assessing the biological impact of environmental pollutants in the Antarctic ecosystems
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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