1,721,029 research outputs found
A taxonomic note on the genus Rindifilum Malavasi, Klimešová, Lukešová & Škaloud (Ulvales, Ulvophyceae)
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Modeling and experimental investigation of the effect of nitrogen starvation and pH variation on the cultivation of the extremophile microalga Coccomyxa melkonianii SCCA048
No full textThe effects of nitrogen concentration and pH on the growth kinetics of the extremophile microalgal strain Coccomyxa melkonianii SCCA 048 in multiwell and batch photobioreactors are investigated in this work. Moreover, the experimental results were successfully interpreted by a simple, mathematical model which represents a starting point towards the development of a suitable tool for the design, control, and optimization of large scale photobioreactors where C. melkonianii would be cultivated. On the basis of fatty acids methyl esters (FAMEs) profile, potential properties of biodiesel have been predicted through suitable software
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
Lutein production by coccomyxa sp. SCCA048 isolated from a heavy metal-polluted river in Sardinia (Italy)
No full textThe unicellular green alga, Coccomyxa sp. SCCA048 was previously isolated scraping the ferrous material deposited on the rocks along the heavy metals-contaminated river 'Rio Irvi' (Arburese mining district, Sardinia, Italy). The kinetics of autotrophic growth and pigment production of the strain in stressing (continuous light) and control cultures (12: 12 light-dark photoperiod) was described. Time course of both cultures reflected typical microbial growth curves. The maximum cell densities (3.1 × 107 and 1.1 × 107 cell/ml, for continuous light and control cultures, respectively) were found at the end of log phase (day 40). However, continuous light conditions accounted for ≅ 280% higher density than control cultures. The specific growth rate (μ) of the microalga during exponential phase in continuous light was 1.5 times higher than that recorded for the control. The pigment profile, characterised by HPLC, was particularly rich in carotenoids, especially lutein (up to 80% of total carotenoids). The algal strain, cultivated in continuous light, showed high intracellular contents of lutein (0.34 pg/cell) at the beginning of the exponential phase. In addition, lutein cell content, at maximum growth, was higher than those reported in literature for others carotenogenic strains of Coccomyxa. Pigment production by control cultures was always much lower. These data suggested that the microalga cultivated under conditions of stressing light might have potential for the large-scale production of antioxidant carotenoids
Lutein production by coccomyxa sp. SCCA048 isolated from a heavy metal-polluted river in Sardinia (Italy)
No full textStimolazione cardiaca a bassa energia mediante elettrocateteri CapSure a rilascio di steroide: nostra esperienza.
No full textStimolazione cardiaca a bassa energia mediante elettrocateteri CapSure a rilascio di steroide: nostra esperienza
Left Ventricular Pacing and Biventricular Pacing Improve Left Anterior Descending Coronary Artery Flow in Patients With Advanced Heart Failure
No full textLeft Ventricular Pacing and Biventricular Pacing Improve Left Anterior Descending Coronary Artery Flow in Patients With Advanced Heart Failur
The Sardinian Culture Collection of Algae (SCCA): Ex situ conservation of biodiversity and future technological applications
No full textThe Sardinian Culture Collection of Algae (SCCA) at Interdepartmental Center of Environmental Science and Engineering (University of Cagliari) is represented by over 100 microalgal authentic strains. Cultures derived from the original type material are maintained and assigned to Cyanophyta, Chlorophyta, Charophyta, Ochrophyta and Euglenophyta, respectively. The main characteristic of this collection is that all the strains are from Sardinia region. In fact, the primary mission of SCCA is to accomplish the isolation, identification, characterization, selection and in vitro cultivation of photosynthetic microorganisms from several habitats of interest in Sardinia. The strains in this collection will provide an extremely useful source of algal strains from Sardinia which can be exploited for laboratory experimentation and future technological applications
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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