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Physiological role of GABA in transgenic tobacco plants expressing human GAD: could GABA represent a metabolic signal for plants?
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Regulation of gamma-aminobutyric acid synthesis by nitrogen availability on tabacco transgenic plants
No full textAroma profile and morphological analysis of Salvia broussonetii Benth
No full textSalvia broussonetii Benth. (Lamiaceae) is a rare shrubby perennial species endemic to Canary Islands; in particular, it grows in Tenerife and Lanzarote preferentially on the basaltic rocks of ocean cliffs (Clebsch and Barner 2003).
Previous phytochemical investigations on S. broussonetii referred to the isolation of triterpene compounds from the plant aerial parts (Gonzalez et al. 1971, 1972a, b), besides the triterpene (Fraga et al. 1991) and diterpene (Fraga et al., 2005) profiles from hairy root cultures. The volatile profiles of the species, as well as the study of the glandular indumentum have been neglected so far.
The main objective of the present investigation is, therefore, the characterization of the volatile organic compounds (VOCs) spontaneously emitted by the leaves and the flowers, and the evaluation of the essential oil (EO) profile obtained from the aerial parts. In addition, we correlated these productivity to the secreting structures
Chemical composition and volatile constituents of Anthyllis barba-jovis
No full textPhytochemical investigation of chloroformic and methanolic extracts from aerial parts of Anthyllis barba-jovis L. (Leguminosae) led to the characterization of six flavonol-glycosides: kaempferol-3-O--D-glucopyranoside, kaempferol-7-O--L-rhamnopyranoside, kaempferol-3-O--D-glucopyranoside-7-O--L-rhamnopyranoside, kaempferol-3-O--D-glucopyranosyl-(12)--L-rhamnopyranoside-7-O--L-rhamnopyranoside, quercetin-3-O--D-glucopyranoside, isorhamnetin-3-O--D-glucopyranoside-7-O--L-rhamnopyranoside were identified together with two coumarins and D-pinitol, a taxonomic marker of Leguminosae family. The structural elucidation of all compounds was based on their 1H and 13C-NMR spectral data, bidimensional experiments and confirmed by MS analysis. In order to complete the phytochemical investigation, the essential oils from flowers and seeds of A. barba-jovis were obtained by hydrodistillation and analyzed by GC/MS; fresh flowers were submitted also to Solid Phase Micro Extraction
Echinacea Angustifolia D.C.: micropropagazione e colture cellulari per la produzione di metaboliti secondari
No full textGoing 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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