1,721,011 research outputs found
MEMS-Based Cell Counting Methods
No full textThis book utilizes a multidisciplinary approach to provide a wide range of information on biosensors and the impact of nanotechnology on the development of biosensors for health care. It offers a solid background on biosensors, recognition receptors, biomarkers, and disease diagnostics. An overview of biosensor-based health care applications is addressed. Nanomaterial applications in biosensors and diagnostics are included, covering the application of nanoparticles, magnetic nanomaterials, quantum dots, carbon nanotubes, graphene, and molecularly imprinted nanostructures. The topic of organ-specific health care systems utilizing biosensors is also incorporated to provide deep insight into the very recent advances in disease diagnostics. Biosensors and Nanotechnology: Applications in Health Care Diagnostics is comprised of 15 chapters that are presented in four sections and written by 33 researchers who are actively working in Germany, the United Kingdom, Italy, Turkey, Denmark, Finland, Romania, Malaysia and Brazil. It covers biomarkers in healthcare; microfluidics in medical diagnostics; SPR-based biosensor techniques; piezoelectric-based biosensor technologies; MEMS-based cell counting methods; lab-on-chip platforms; optical applications for cancer cases; and more. Discusses the latest technology and advances in the field of biosensors and their applications for healthcare diagnostics Particular focus on biosensors for cancer Summarizes research of the last 30 years, relating it to state-of-the-art technologies Biosensors and Nanotechnology: Applications in Health Care Diagnostics is an excellent book for researchers, scientists, regulators, consultants, and engineers in the field, as well as for graduate students studying the subject
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
Development of a sensitive immunosensor for the detection of cardiac Troponin T in cardiovascular disease
Full text linkCardiovascular disease (CVD) is currently globally the biggest cause of mortality, with rising figures, especially now in the developing world. Early and accurate diagnosis of CVD, (especially acute myocardial infarction (AMI) is important in being able to provide appropriate, timely and cost effective treatment, or to take preventative action. Biomarkers and biosensors are playing an increasingly important role in this diagnosis, especially those based on immunoassays. As technology improves and becomes cheaper, there is the potential to develop immunosensors which use optical techniques such as surface plasmon resonance (SPR) for biomarker measurement which could be used effectively in point-of-care diagnostics for real-time detection.
This thesis describes the development and optimisation of a sensitive immunosensor for the AMI specific biomarker, cardiac Troponin T (cTnT), on an SPR platform. Early diagnosis of AMI requires an assay methodology which can determine very low concentrations of cTnT in human serum.
The work conducted includes the development of a set of optimised conditions for the immobilisation of the capture antibody (anti-cardiac Troponin T 1C11 antibody) onto a gold surfaced SPR sensor chip, to which a self-assembled monolayer of 11-mercaptoundecanoic acid has been applied. A direct immunoassay for cTnT in buffer was examined and a limit of detection (LOD) of 25 ng ml-1 cTnT was achieved. A sandwich immunoassay format was then developed to enhance the sensitivity of the assay. The use of a detection antibody (anti-cardiac Troponin T 7G7 antibody) was shown to successfully amplify the SPR response five-fold, with the LOD improving to 5 ng ml-1 cTnT.
The second stage of the project involved examining the extent of non-specific binding of the cTnT and of serum proteins, and investigating how best to minimise and control for it. Non-specific binding of cTnT was eliminated, and serum protein binding was reduced by 93% in 10% serum and 73% in 50% serum. To achieve greater sensitivity, amplification of the signal through the use of detector antibodies conjugated to gold nanoparticles (AuNPs) for the sandwich assay was investigated. The performance of the cTnT immunosensor sandwich assay in human serum was evaluated using non-modified and AuNP modified detector antibodies. The LOD of the immunosensor in 50% serum was assessed as 5 ng ml-1 cTnT for the standard sandwich assay, and 0.5 ng ml-1 cTnT when using AuNP conjugated detector antibodies to enhance the sensitivity
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
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