1,720,969 research outputs found
Indagini preliminari sulla conservazione del polline di Ranunculaceae ornamentali e sul suo potenziale utilizzo per la valutazione della tossicità dei fitofarmaci impiegati nelle coltivazioni in serra.
No full textA survey of bacterial slow wilt and canker in carnation in Italian nurseries
No full textThe results are reported of a two‐year campaign of bacteriological analyses carried out on carnation mother‐plants in 24 Italian nurseries to detect the presence of Erwinia chrysanthemi pv. dianthicola and Pseudomonas caryophylli. One hundred and eighteen samples were taken of 99 different cultivars or clones. The detection methods combined indirect fluorescent antibody staining (IFAS) and direct isolation (DI) on selective media. Only one of the 24 nurseries surveyed revealed latent infections of E. c. dianthicola. All the other nurseries were shown to be free from both pathogens. Measures taken to eradicate the disease in the affected nursery were successful. Copyright © 1988, Wiley Blackwell. All rights reserve
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
Metabolic changes associated to the unblocking of adventitious root formation in aged, rooting-recalcitrant cuttings of Eucalyptus gunnii Hook. f. (Myrtaceae)
No full textIn many tree species, the ability to produce adventitious roots is limited by specific changes related to the physiology of
reproduction and ageing. In spite of its ecological significance, little is known about the physiological mechanisms determining
the irreversibility of these non-rooting states in some species. In this study, we performed natural and hormone-induced
rooting of stem cuttings from mature individuals of rooting-recalcitrant Eucalyptus gunnii in order to characterize the poorly
known metabolic changes associated to the formation of adventitious roots in a rooting-recalcitrant tree species. Stem cuttings,
either with or without an apical meristem, were put in a rooting greenhouse after having been treated with two different
synthetic auxins, indole-3-butyric acid and 1-naphthaleneacetic acid. During the rooting processes changes in the secondary
metabolism of the cutting stem tissue were observed and analyzed through different chromatographic techniques. Rooting of
cuttings in E. gunnii proved to be hastened by the accumulation in tissues of methyl gallate. Its natural metabolization and
disappearance during the long period of cutting stay in the rooting benches restored the adventive rooting ability. In the same
period, a concomitant accumulation in cutting tissues of quercetin-like flavonoids was observed. Rooting was enhanced by
the addition of indole-3-butyric acid and 1-naphthaleneacetic acid, although rooting of cuttings with apical meristem was not
influenced by hormonal treatments. Seasonal conditions had no effect on the percentage of rooted cuttings, although rooting
took 1 month longer in the autumn/winter trial. In general, auxinic treatments did not affect the production of cutting new
leaves but did favor the initial differentiation of new root tissue. Rooting was blocked by the presence in the tissues of the
inhibitor methyl gallate, the degradation of which allowed the rooting processes to take place. Metabolization and disappearance
of this rooting inhibitor was associated with the production and further glycosylation of flavonols. Our results suggest
that the switch between the metabolic pathways of gallic acid and shikimic acid and other flavonoid precursors is a crucial
step in the process leading to the formation of adventitious roots in aged E. gunnii cuttings
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
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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