1,720,968 research outputs found
Evaluating the Growth Response of Ricinus communis L. Cultivars to Salt Stress Using a Fast and Reliable Bioassay
Get PDFHere is proposed an easy, fast, and economic technique to investigate plant physiological traits in response to salt stress by using castor bean (Ricinus communis L.). Four Ricinus communis L. cultivars (TUNI 1, TUNI 4, C1012, and C1028) were grown in a growth chamber for 15 days on a sand substrate and were watered regularly with deionised water or NaCl solution (water electrical conductivity (EC) 4, or 8 dS m− 1) to keep soil moisture close to field capacity. According to roots, stem, and germination traits and derived indices, TUNI 1 and TUN4 showed the best growth performance on sand irrigated with 4 dS m− 1 and 8 dS m− 1, respectively. Besides, comparing C1028 and C1012, the former showed a higher tolerance at the maximum electrical conductivity tested related to the latter, increasing salt tolerance index (STI) of roots (+ 25%) and stem (+ 20%). In conclusion, the present findings suggest that the TUNI 4 cultivar of Ricinus communis L. demonstrates superior overall performance, even under highly saline conditions, such as irrigation with 8 dS m− 1. Conversely, the TUNI 1 cultivar shows a good ability to perform in marginal soils with moderate salinity levels, such as those irrigated with 4 dS m− 1. Our results represent the first step towards optimization of a cost-effective method/bioassay for the selection of salt tolerant Ricinus communis L. cultivars and genotypes
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
Phytomanagement of shooting range soils contaminated by Pb, Sb, and as using Ricinus communis L.: effects of compost and AMF on PTE stabilization, growth, and physiological responses
Get PDFShooting ranges represent a critical case of soil contamination due to the accumulation of Pb, Sb, and As from bullet residues. Effective and sustainable remediation strategies are required to mitigate environmental and health risks while enabling land valorization. This study investigates the potential of Ricinus communis L. for phytomanagement of Pb-, Sb-, and As-contaminated soils, evaluating the combined effects of compost, mineral fertilizer, and arbuscular mycorrhizal fungi (AMF) on plant growth, PTE accumulation and bioavailability, and biomass production. A mesocosm experiment was conducted using highly contaminated soil (about 5000 mg kg−1 Pb, 100 mg kg−1 Sb). Despite severe contamination, Ricinus communis L. achieved stable biomass and seed yield (about 5.7 Mg ha−1 seeds, 2–3 Mg ha−1 oil), similar to values reported in non-contaminated soils of the Mediterranean area. Compost and AMF increased PTE bioavailability in the rhizosphere, likely due to root exudate activity, but maintained low translocation factors (TF < 1), indicating limited PTE uptake into aerial biomass. These findings confirm the phytostabilization potential of Ricinus communis L., reducing PTE dispersion while promoting renewable energy production preventing competition for land used for growing food crops
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
Analyses of native vegetation for a detailed characterization of soil contaminated by tannery waste disposal.
No full textDispelling 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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