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Adaptability and Sustainable Management of High-Erucic Brassicaceae in Mediterranean Environment
No full textThe use of high-erucic acid oils is currently receiving increasing attention, due to the great
interest in chemical compounds derived from “green feedstock”. At world level, the
production of these raw materials is constantly growing, and a real niche market has
progressively been created (Mosca & Boatto, 1994). This scenario will allow greater
substitution of chemicals with “green” compounds, and the introduction of industrial oilcrops
may lead to further expansion of the green market. Alternative uses of crops for nonfood
purposes may be an interesting source of profit for farmers, as is happening for higherucic
acid oils. The current demand for these oils is still limited: at world level, it is nearly
20,000 tonnes of erucic acid, corresponding to about 57,000 tonnes of oils, used for deriving
erucamide and various others chemical compounds. Brassicaceae are the most interesting botanical Family for producing erucic acid, due to the
large number of suitable species and varieties, providing on their own the whole amount of
erucic needed worldwide. The content of erucic acid ranges greatly, with high inter- and
intra-specific variations: within the same species, variations may be very large. even higher than 30%, as for Brassica juncea. This probably indicates that efficiency in erucic
acid accumulation may be greatly improved by adequate screening of genotypes, but also
that important genetic resources may be used for breeding purposes. In this regard, an
amount of 66% of erucic acid in oil must be considered, at least in rapeseed, as the current
theoretical limit of accumulation (Renard et al., 1994).
For some of these species (e.g., Brassica napus var. oleifera, Crambe abyssinica) yield potential
and environmental adaptation have been sufficiently studied in southern Europe (Lazzeri et
al., 2009; Zanetti et al., 2006 a), although there is lack of information on some others, such as
Brassica juncea and B. carinata
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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 in yield and gluten proteins in durum wheat varieties under late-season foliar vs. soil application of nitrogen fertilizer in a northern Mediterranean environment
No full textBACKGROUND: With the increasing demand for high-quality foodstuffs and concern for environmental sustainability, late-season nitrogen foliar fertilization of common wheat is now an important and widespread practice.
RESULTS: We investigated the effects of late-season foliar vs. soil N fertilization on yield and protein content of four varieties of durum wheat, Aureo, Ariosto, Biensur and Liberdur, in a three-year field trial in northern Italy. Variations in LMW-GS, HMW-GS and gliadins were assessed by SDS-PAGE. We found that N applied to the canopy did not improve protein rate compared with N application to the soil (general mean: 138 mg g-1), but moderately increased productivity in the high-yielding varieties Liberdur and Biensur (three-year means: 7.23 vs. 7.13 t ha-1 and 7.53 vs. 7.09 t ha-1, in two varieties respectively). Technological quality was mainly related to variety choice, Aureo and Ariosto having higher protein rates and glutenin/gliadin ratios. We also found a strong ‘variety N application method’ interaction in the proportions of protein sub-units within each class, particularly LMW-GS and gliadins. A promising result was the higher N uptake efficiency, although as apparent balance, combined with higher HMW/LMW-GS ratio in var. Biensur.
CONCLUSION: Late-season foliar N fertilization allows N fertilizer saving, potentially providing environmental benefits in the rainy climate of the northern Mediterranean area, and also leads to variety-dependent up-regulation of essential LMW-GS and gliadins. Variety choice is a key factor in obtaining high technological quality, although it is currently associated with modest grain yield. We provide evidence of high quality in the specific high-yielding variety Biensur, suggesting its potential as a mono-varietal semolina for pasta production
Variations on the Author
Get PDF“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
Get PDFWe 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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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