1,720,984 research outputs found
Chemical composition of essential oils and aromatic waters from different Italian Anthemis maritima populations
No full textChemical composition and volatile constituents of Anthyllis barba-jovis
No full textSix flavonol glycosides were isolated and identified from the aerial parts of Anthyllis barba-jovis L. (Leguminosae), together with two coumarins and D-pinitol, a taxonomic marker of Leguminosae family. The structural elucidation of all compounds was based on their (1)H- and (13)C-NMR spectral data and bidimensional experiments. The total flavonoid content was also determined, according to the method described in the Italian pharmacopoeia. In order to complete the phytochemical investigation on A. barba-jovis, the essential oils from flowers and seeds were obtained by hydrodistillation and analysed by GC-MS; fresh flowers were analysed also directly by solid phase micro extraction (SPME)
Pterocarpans from Bituminaria morisiana and Bituminaria bituminosa
No full textThe aerial parts of Mediterranean papilionaceous plants Bituminaria morisiana and B. bituminosa afforded, along with known phenolics, the prenylated pterocarpans bitucarpin A and B, whose structure was elucidated by spectroscopic techniques. A known isoflavonoid (8-prenyldaidzein) was also obtained for the first time as a genuine plant constituent. The accumulation of pterocarpans at the expense of biogenetically more primitive shikimate metabolites like furanocoumarins or isoflavonoids supports the inclusion of this plant, once part of the genus Psoralea, into the distinct genus Bituminaria
Micropropagazione di specie aromatiche dell'isola d'Elba
No full textElba island belong to the archipelago Toscano, the largest marine Park in Europe, influenced by the Mediterranean climate. Its vegetation is characterised by several aromatic species used as traditional food and cosmetics, in phytotherapy and aromatherapy. The plants are usually collected in wild field, inducing a impoverishment of the natural habitat The aim of this study is to utilize micropropagation technique, commonly used for massive production of plants, for the conservation of the germoplasm of selected species typical of these islands: Calamintha nepeta L., Crithmum maritimum L. Lavandula angustifolia Miller, Myrtus communis L., Nepeta cataria L., Rosmarinus officinalis L., Salvia officinalis L., Satureja hortensis L. The main type of explants used have been either microcutting (vegetative apical portions), in some case axillary buds, or internodes. After sterilization the explants were placed on suitable culture media for growth. Sterilization percentage and multiplication rate were measured, indicating that some wild plants were difficult to sterilize, but others were well in vitro propagated. The detection of head-space components produced from the in vitro plantlets looks similar to that known in wild type plants. Micropropagation of these aromatic plants will play a role for protection of ecosystem but also an additional use, as “babyplants“, a token gift for tourist customers
Psoralea Bituminosa L. In Vitro Cultures And Hairy Roots For Bioactive Constituents Production
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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
l’isola d'Elba, un territorio strategico per lo sviluppo e la valorizzazione delle piante aromatiche locali
No full textL’obiettivo di questo lavoro è la salvaguardia della biodiversità e la valorizzazione di alcune specie aromatiche presenti nell’isola d’Elba utilizzando nuove tecniche di propagazione. Le piante aromatiche selezionate ed utilizzate sono state: Calamintha nepeta L., Lavandula angustifolia L., Myrtus communis L. e Salvia officinalis L. I risultati ottenuti dalla sterilizzazione, proliferazione e radicazione dei diversi espianti hanno mostrato la possibilità di utilizzare tali specie aromatiche in diversi settori valutando la possibilità di introdurre nella filiera commerciale la produzione di “baby plants” per dare nuovo impulso allo sviluppo imprenditoriale dell’arcipelag
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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