1,720,976 research outputs found
Sensory and phytonutritional characteristic of ornamental flowers as new functional foods
No full textEdible flowers have been traditionally used for human consumption in various part of the world. These flowers are able to enhance the aesthetic value of food (mainly as garnishment) and sometimes to improve its taste. The sensory characteristics of edible flowers (colour, taste, aroma) represent a first approach for the consumers. Several edible flowers are characterised by important nutritional, antioxidant and anti-microbial properties and thus in recent time, the worldwide consumer demand is increasing. Their nutrients and bioactive compounds seem to be important and beneficial for human health. A deep characterisation of new edible flowers' phytochemical profile is essential to identify nutraceutical compounds and unusual tastes, but also to ensure consumers' security
Plant Tissue Culture and Secondary Metabolite Production Volume II
No full text: Secondary metabolites play a key role in the communication of the plant organism with the everchanging biotic and abiotic stimuli of its versatile environment [...]
Volatilomic analysis of four edible flowers from agastache genus
Full text linkVolatilomes emitted from edible flowers of two species of Agastache (A. aurantiaca (A.Gray) Lint & Epling, and A. mexicana (Kunth) Lint & Epling) and from two hybrids (Agastache 'Arcado Pink' and Agastache 'Blue Boa') were investigated using a solid-phase microextraction technique as well as the extraction of its essential oils. Oxygenated monoterpenes were almost always the predominant class (>85%) of volatile organic compounds (VOCs) in each sample of A. aurantiaca, A. 'Blue Boa' and A. mexicana, with the exception of A. 'Arcado Pink' (38.6%). Pulegone was the main compound in A. aurantiaca (76.7%) and A. 'Blue Boa' (82.4%), while geranyl acetate (37.5%) followed by geraniol (16%) and geranial (17%) were the principal ones in A. mexicana. The essential oil composition showed the same behavior as the VOCs both for the main class as well as the major constituent (pulegone) with the same exception for A. mexicana. Total soluble sugars, secondary metabolites (polyphenols, flavonoids and anthocyanins) and antioxidant activity were also investigated to emphasize the nutraceutical properties of these edible flowers
Phytonutritional compounds and antioxidant activity of eight new edible flowers
No full textIn the last years, special attention has been given to the nutritional
properties of food, and the edible flowers (EFs) represent an uncommon
fresh product to characterise, with the aim to explore new
species with peculiar aesthetic and the aromatic features. This work
investigated some nutritional properties of eight new EFs, such as
Begonia boliviensis A.DC. (pink and white varieties), Dahlia pinnata
Cav., Salvia farinacea Benth., S. × jamensis J.Compton, S. ‘Purple
Queen’ Tulbaghia simmleri Beauv. ‘Alba’, T. violacea Harv. ‘Alba’, chosen
for their different colours and corolla morphologies. Primary
and secondary metabolites have been determined. The highest protein
content was found in T. violacea ‘Alba’ and D. pinnata. The
Salvia species showed the highest soluble sugar content. The two
Tulbaghia species were notable for hexose and ascorbic acid content.
D. pinnata showed the highest polyphenols, flavonoids and
carotenoid content, with the highest antiradical activit
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
Short Lecture "Phytochemical, nutritional, and mineral content of four edible flowers"
No full textThe consumption of flowers as food dates to ancient Greek and Rome and survives to the present day as part of the traditional cuisine of different countries [1]. The consumption of edible flowers (EFs) is significantly increased in the last few years, due to both their numerous healthy compounds and the heightened awareness of people to the food quality [1]. In this context four EFs were investigated to evaluate their aromatic profile and their nutritional value. The studied species were Dianthus chinesis L., Viola cornuta L., Fucsia regia (Vand. Ex Vell.) Munz and Cucurbita moschata Duchesne. p-Dimethoxybenzene (77.5%), cis-hexenyl acetate (31.2%) and decanal, non-terpene compounds, were the main constituents in volatile profile (by HS-SPME analysis) of C. moschata and D. chinensis, and F. regia, respectively. On the contrary V. cornuta was rich in terpenes mainly represented by myrcene (36.7%) and α-farnesene (34.5%). The extraction of the essential oil (EO) was carried out on C. moschata, D. chinensis, and V. cornuta. The EOs of the first two species maintained the prevalence of non-terpenes even though heneicosane (34.9%) and behenic alcohol (39.6%) becomes the principal ones, respectively, while Viola EO was rich in (E)-palmitoleic acid (31.3%). From the nutritional point of view, F. regia have the most interesting flowers, with the highest content of polyphenols, anthocyanins, calcium, iron, and zinc. D. chinensis contains the higher soluble sugars, and common C. moschata flowers contain high quantities of crude proteins, phosphorous, potassium and magnesium and low content of secondary metabolite
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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