1,720,956 research outputs found
Influence of Sodium Oxamate on Oil Content in Canola Leaves
Get PDFBiofuels that share similarities to petro-diesel regarding combustion properties have received renewed attention. Triacylglycerols (TAG) comprise the main compound in plant oil seed crops and animal fats that is used for biodiesel. In senescent leaves, TAGs are the most abundant pool of lipids. TAGs contain higher levels of fatty acids than are found in chloroplast membranes. Synthesis of glucose from non-carbohydrate carbon substrates occurs via gluconeogenesis from the oxidation of TAGs into glucose, pyruvate, lactate, and glycerol. This study examines the effect gluconeogenesis inhibitors, such as sodium oxamate, could play in increasing oil accumulation in plants. Also, this study tests the efficacy of sodium oxamate in increasing TAG and membrane
lipids in Brassica napus. Several concentrations of sodium oxamate (control, (water with surfactant), 0.0005 mM, 0.005 mM, 0.05 mM, 0.5 mM) were applied to plant leaves. Oil was extracted by using chloroform/methanol (2:1) in accelerated solvent extraction. No oil bodies were observed in the leaves from the vegetative to the reproductive stages for each treated plant. Extracted oil from each plant was separated using thin layer chromatography (TLC) to determine if changes in lipid composition occurred in leaves. We concluded that sodium oxamate did not affect the oil accumulation in leaves of B.napus under the conditions tested. Further studies should be conducted with alternate species and varying surfactants to understand the role that sodium oxamate plays in
altering gluconeogenesis driven oil content
Understanding Programmed Cell Death Pathways by Characterizing Barley Disease Lesion Mimic Mutants
Get PDFProgrammed cell death (PCD) in plants refers to rapid and localized cell death that occurs as a result of regular biological processes, or in response to infection or injury. Understanding the molecular mechanisms of PCD will fill key knowledge gaps in regard to plant development or resistance mechanisms. Upon pathogen invasion salicylic acid and reactive oxygen intermediate (ROI) signaling responses are triggered that contribute to the PCD outcome. Substantial research efforts have been conducted to identify genes involved in these PCD pathways including the generation and characterization of disease lesion mimic mutants (DLMMs) that spontaneously express PCD and necrotic lesions that resemble necrotrophic diseases in the absence of infection by a pathogen. The constitutive expression of PCD may be a result of the deletion of gene/s that directly or indirectly suppress PCD when it is not needed. Five fast neutron generated DLMMs in the cultivar (cv) Steptoe background (FN360, FN361, FN365, FN370 and FN396) were crossed with the cv Morex and 400 F2 individuals of each population were screened for the mutant phenotype. Allele frequency mapping was used to map the mutation in each population to different chromosomal locations showing that each was caused by a different gene. Thus, each phenotype is the result of different mutated gene(s) in the PCD pathway that needs to be functionally validated
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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