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Righetti, C J, VX39753
No full textThis record was harvested from a previous catalogue system and will be withdrawn in 2025. Information in this record may be superseded or incomplete. Visit this record in UMA's new catalogue at: https://archives.library.unimelb.edu.au/nodes/view/413374Surname: RIGHETTI. Given Name(s) or Initials: C J. Military Service Number or Last Known Location: VX39753. Missing, Wounded and Prisoner of War Enquiry Card Index Number: 29430.232084
Item: [2016.0049.45635] "Righetti, C J, VX39753
High-resolution magnetic resonance spectroscopy of the mouse vomeronasal organ
No full textThe chemical composition of the vomeronasal organ (VNO) was investigated by means of in vitro proton magnetic resonance spectroscopy (MRS) in prepubertal and adult mice of both sexes. Results demonstrate that MRS detects several chemical constituents in the VNO, showing their age- and sex-associated changes in concentration. Preliminary experiments also suggest the ability of MRS to show compositional changes in the VNO after pheromonal stimulation. MRS can serve as a useful technique to investigate vomeronasal chemoreception
NMR spectrocopic analysis of rat brain development:in vitro proton and carbon studies of whole tissue and its phospholipid fraction
No full textThe developmental patterns of the rat brain at several postnatal time points were investigated in Folch (chloroform-methanol) extracts. The chloroform- (lipid-containing) and water-soluble (cytosolic) fractions of whole-tissue extracts and the phospholipid fraction separated from the organic fraction by chromatography were analysed by means of high-resolution1H and 13C nuclear magnetic resonance (NMR) spectroscopy. Analysis of the cytosolic fraction showed the changing patterns of several brain metabolites during postnatal maturation, in full agreement with data obtained from perchloric acid extracts. 1H NMR spectroscopy of the phospholipid fraction allowed for quantitative evaluation of fatty acid acyl chain length, mean unsaturation and mean polyunsaturation. It was found that both mean unsaturation and polyunsaturation are lower in adult brain phospholipids than during the first 3 postnatal weeks. 13C NMR spectroscopy of the same fraction showed that the molar percentage of C18 fatty acids (oleic, linoleic, linolenic) in brain phospholipids is similar at all the investigated time points. These results indicate that the combination of Folch extraction with simple chromatographic procedures and NMR analysis yields useful data to define the chemical maturation of the brain. Copyright © 2001 S. Karger AG, Basel
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
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