1,721,129 research outputs found
Han Anna
No full text학위논문(석사)--아주대학교 일반대학원 :분자과학기술학과,2010. 2Cover page 1
Approval page 3
Acknowledgements 4
Abstract 5
Table of Contents 7
List of Figures 8
List of Scheme 10
Introduction 11
Experimental Section 14
Results and Discussion 16
Conclusions 33
References 34MasterColloidal magnetic nanocrystals have been studied extensively on account of their peculiar magnetic properties resulting from their nanosized domains. They are core materials in many applications related to data storage, magnetic separation, drug delivery, and magnetic resonance image (MRI) contrast enhancement.
Magnetic ferrites, which are expressed by MFe2O4 (M: Fe, Co, Mn, Ni, Cu, Zn), have attracted considerable attention and been well studied because of their easy magnetic property engineering by adjusting the M2+ ion. Various methods have been used to synthesize ferrite nanocrystals, including reverse micelle and nonhydrolytic methods. We report a new method for fabricating MnFe2O4 nanocrystals and their toxicity studies.
Additionally, the possibilities for a dual functional MRI contrast agent in T1 and T2 imaging will be presented. A magnetization value of a sample is much lower than those reported previously, which might be due to the small size and low crystallinity of the ferrite nanoparticles. Although the weak magnetic properties could be regarded as a drawback, it was found that it can provide an opportunity for dual MRI contrast agents. Generally, manganese ferrite has a T2 weighted effect because of its strong magnetic properties. However, the low r2 value of ferrite by this method gives it a useful T1 weighted effect.
The cytotoxicity of manganese ferrite was examined on MCF-10A normal cells and various breast cancer cells (MDA-MB435S, MDA-MB 231, and MCF-7). Few reports have been published on cytotoxicity of manganese ferrite nanocrystals. The microscopy images showing the morphological changes indicated that two type cells were not damaged at concentrations between 0.1 mM and 1 mM. The method could be applied to other ferrite nanoparticles including cobalt ferrite
Replication Data for Becoming A Resilient Scientist
No full textScience trainees face significant challenges and stressors that negatively impact their mental health, and COVID-19 has exacerbated these effects. The Becoming a Resilient Scientist Series (BRS) attempts to address these challenges by increasing resilience among science trainees. The 5-part workshop intervention demonstrated positive outcomes with increased resilience, decreased stress and anxiety, and improved self-awareness and self-efficacy. BRS is the first program catering to the unique culture and environment of science trainees and scientists. Participants in the program reported high satisfaction, recommended the program, and perceived positive changes in their resilience skills. Practical interventions, such as BRS, are vital in addressing the core causes of trainee stress and promoting resilience in the face of uncertainty, and therefore, retaining scientific talent
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
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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