1,720,965 research outputs found
Ce<sub>2</sub>O<sub>3</sub> nanoparticle synthesis, characterization, and application to callus formation and plant regeneration from mature embryo culture of wheat (<i>Triticum aestivum</i> L.)
No full textCerium oxide nanoparticles (Ce2O3-NPs) are widely used for their catalytic and oxidative properties, such as in diesel additives and potential oncology treatments. However, limited data exists on their impact on callus formation and plant regeneration in wheat. This study investigates the effects of different genotypes and Ce2O3-NPs concentrations on callus formation and plant regeneration in wheat (Triticum aestivum L.) using mature embryo culture. Our hypothesis was that Ce2O3-NPs would enhance callus and plant regeneration rates in a genotype-dependent manner. We used Murashige and Skoog (MS) medium with varying concentrations of Ce2O3-NPs (1-7 mg/L) to assess their effects. The K & imath;rik genotype showed the highest callus formation (7 mg/L Ce2O3-NPs), while the Rumeli genotype showed the lowest (1 mg/L Ce2O3-NPs). Embryogenic callus formation was the highest in K & imath;rik without Ce2O3-NPs and the lowest in Rumeli with 3 mg/L Ce2O3-NPs. Root and shoot formation rates in Rumeli were 16.03% and 51.40%, respectively, compared to 3.94% and 40.49% in K & imath;rik. The main outcomes demonstrated that 1 mg/L Ce2O3-NPs promoted root formation, while 7 mg/L was optimal for shoot formation. Genotypic effects on callus, root, and shoot formation, as well as plant regeneration, were significant. MS media with Ce2O3-NPs enhanced callus formation and regeneration in wheat tissue culture, highlighting the importance of genotype in these processes. Future research should explore the underlying mechanisms of Ce2O3-NPs' effects on plant tissue culture and extend the study to other plant species to validate these findings
Eco-friendly synthesis of nano copper and its use in fenton-like reactions for methylene blue degradation
No full textCopper oxide nanoparticles (CuO NPs) were produced using green synthesis method with Cimin grape extract (Vitis vinifera cv.). The produced CuO NPs were used to remove methylene blue (MB) from water by degradation with Fentonlike reactions. The surface properties of the CuO NPs were determined by FT-IR, SEM and XRD techniques. Experimental parameters for MB removal were selected as: pH: 3 – 11; Temp: 20 - 80°C; initial MB concentration (15 -50 ), and CuO NPs concentrations (25 - 800 mg ). The best reaction conditions were found to be pH: 7 - 11, temperature: 40 - 45°C, interaction time: 120 min, initial MB concentration: 3.125 mg and CuO NPs concentration: 25 mg . Under these conditions, CuO NPs showed a 97.80% efficacy for the removal of MB from wastewater with Fentonlike process. Moreover, this study showed that reagents were reusable, inexpensive, biocompatible, easy to prepare, harmless and Fenton-like reaction conditions were created
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 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
Investigation of Antimicrobial and Genotoxic Effects of Fe2O3, NiO and CoO NPs Synthesized by Green Synthesis
No full textIt is seen that metal nanoparticles are used in many areas due to their antimicrobial effects. For this reason, our study focused on the production of alpha-Fe2O3, NiO and CoO NPs of golden nanoparticles, which are easily obtained with the use of Erzincan grape extract, safe to use, environmentally friendly and cost-effective. Metal ions synthesized by the green synthesis method were characterized using the Scanning Electron Microscope (SEM) analysis. From the SEM diagrams of the synthesized nanoparticles, it was determined that the nanoparticles were approximately 5 to 65 nm in size. Both antimicrobial, genotoxicity and cytotoxicity effects were investigated to determine the rates at which nanoparticles can be used as biosafe. Synthesized alpha-Fe2O3, NiO and CoO NPs showed excellent antibacterial properties on pathogen bacteria against human. In addition, it was determined that alpha-Fe2O3, NiO and CoO M-NPs showed genotoxic properties in parallel with increasing concentrations. This study, as far as we know, is the first report on microbial alpha-Fe2O3, NiO and CoO NPs and their biological properties synthesized by this statistical approach
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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