1,721,036 research outputs found
"Endonuclear Bacterial Symbionts in two termite species: an ultrastructural study". J Submicrosc Cytol Pathol, 29 (2), 281-292, 1997
No full textBatteri simbionti endonucleari in Kalotermes flavicollis e Reticulitermes lucifugus ( Isoptera)”.
No full textGeographical origin of Vitis vinifera cv. Cannonau established by the index of bioaccumulation and translocation coefficients
No full textGeochemical fingerprints in grape require an identification of major and trace elements that show correlations between concentrations in soil and in plant tissues: these correlations are relevant to discriminate grapes according to geographical origin. The Vitis vinifera cultivar Cannonau is used to produce the renowned Italian controlled designation of origin (DOC) wine Cannonau from Sardinia. Two Cannonau vineyards located in Sardinia Region were studied to establish the relationship between geochemical features of vineyard soil and chemical composition of leaves and grape berries. Major and trace elements were determined by X-ray fluorescence and inductively coupled plasma-mass spectrometry in soil, leaf, and grape berry samples. The index of bioaccumulation and the translocation coefficients were also calculated for all elements. Data from the two study areas were compared by a non-parametric test and multivariate statistics (principal component analysis). The results showed a specific assimilation of these elements in leaf and grape berry from vine in two different soils. Moreover, geochemical characterization and statistical analysis enabled to discriminate the cultivar Cannonau according to geographical origin. The results showed that the elements that could establish a reliable correlation between the soil vineyard and leaves and grape berries from the two study areas were B, Sr, and Zr. These elements may therefore be used as geochemical fingerprints to identify the geographic origin of V. vinifera cv. Cannonau in the two study areas
Circadian variations of serum myoglobin in healthy subjects.
No full textIn order to evidentiate whether a circadian rhythm of the myoglobin serum concentration is present in humans, we measured serially the myoglobin levels in blood samples of 21 healthy subjects (10 females and 11 males), at bed rest, by means of a sensitive and accurate radioimmunological method. The data obtained were then evaluated according to the single and mean cosinor analysis, to assess the presence of a significant circadian rhythm. Eighteen of the 21 subjects showed a significant circadian rhythm. The calculated equation for the mean cosinor was: Y = 19.12 + 4.09 cos (15t-128.24) and the F-value for the zero amplitude test was 19.9 (p less than 0.001). Our data demonstrate that circadian variations of myoglobin serum concentration are likely to occur in humans. These findings strongly emphasize the need to take the time of sample collection into account when employing serum myoglobin as a marker for muscle damage
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
Saharan dust particles in snow samples of Alps and Apennines during an exceptional event of transboundary air pollution
No full textSouthern European countries are often affected in summer by transboundary air pollution from Saharan dust. However, very few studies deal with Saharan dust pollution at high altitudes in winter. In Italy, the exceptional event occurred on February 19, 2014, colored in red the entire mountain range (Alps and Apennines) and allowed to characterize the particulate matter deposited on snow from a morphological and chemical point of view. Snow samples were collected after this event in four areas in the Alps and one in the Apennines. The particulate matter of the melted snow samples was analyzed by scanning electron microscopy with energy dispersive X-ray spectrometry (SEM-EDS) and by inductively coupled plasma mass spectrometry (ICP-MS). These analyses confirmed the presence of Saharan dust particle components in all areas with similar percentages, supported also by the positive correlations betweenMg-Ca, Al-Ca, Al-Mg, and Al-K in all samples
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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