1,721,123 research outputs found
산화 환원 흐름전지를 위한 초고이온선택성의 고분자 전해질 복합막
No full textNCHAPTER I. INTRODUCTION 1
1.1 Theoretical background 1
1.2 The fundamental of redox flow battery (RFB) 2
1.3 RFB types and energy production capability 3
1.4 Problem description and current understanding 6
1.5 Development of membranes for vanadium redox flow battery (VRFB) 7
1.5.1. Cation exchange membrane 7
1.5.1.1 Perfluorosulfonic acid membrane (Nafion®) 8
1.5.1.2 Nafion/filler composite membrane 9
1.5.1.3 Hydrocarbon polymer membrane 12
1.5.1.4 Hydrocarbon polymer composite membrane 13
1.5.2 Anion exchange membranes 17
1.5.3 Amphoteric ion exchange membranes (AIEMs) 19
1.6 Motivation and goal of this dissertation 21
CHAPTER II. EXPERIMENTAL METHODOLOGY 24
2.1 Materials 24
2.2 Preparation of graphene oxide (GO) and sulfonated graphene oxide (sGO) 24
2.3 Preparation of metal oxide nanotubes (ZrO2NT, TiO2NT and TiZrO4NT) 25
2.4 Synthesis of sulfonated poly(ether ketone sulfone) (SPEKS) block copolymer 26
2.4.1 Synthesis of hydrophilic oligomer 26
2.4.2 Synthesis of hydrophobic oligomer 26
2.4.3 Synthesis of block copolymer (SPEKS) 27
2.5 Synthesis of sulfonated poly(arylene ether ketone) (SPAEK) block copolymer 27
2.5.1 Synthesis of hydrophilic oligomer 27
2.5.2 Synthesis of hydrophobic oligomer 28
2.5.3 Synthesis of block copolymer (SPAEK) 28
2.6 Preparation of composite membrane 28
2.6.1 SPEKS/sulfonated graphene oxide (sGO) composite membrane 28
2.6.2 SPAEK/ZrO2 nanotubes (ZrO2NT) composite membrane 29
2.6.3 Nafion-metal oxide nanotubes composite membranes 29
2.7 Preparation of H6[CoW12O40] 30
2.8 Characterization techniques 30
2.8.1 Water uptake, swelling degree, ion exchange capacity (IEC) and oxidative stability 31
2.8.2 Proton conductivity 32
2.8.3 Measurements of VO2+ and [CoW12O40]6- permeability, and ion selectivity 32
2.8.4 Measurements of redox flow battery performance 33
CHAPTER III. SULFONATED POLY(ETHER KETONE SULFONE) COMPOSITE MEMBRANE (SPEKS/sGO) FOR VANADIUM REDOX FLOW BATTERY 35
3.1 Introduction 35
3.2 Results and discussion 37
3.2.1 Characterization of sGO and SPEKS/sGO composite membrane 37
3.2.2 Proton/vanadium selectivity measurements 50
3.2.3 VRFB performance 53
3.3 Summary 64
CHAPTER IV. SULFONATED POLY(ARYLENE ETHER KETONE) COMPOSITE MEMBRANE (SPAEK/ZrO2NT) FOR VANADIUM REDOX FLOW BATTERY 65
4.1 Introduction 65
4.2 Results and discussion 66
4.2.1 Characterization of SPAEK/ZrO2NT composite membrane 66
4.2.2 VO2+ permeability and ion selectivity measurements 72
4.2.3 VRFB performance 74
4.3 Summary 84
CHAPTER V. NAFION DECORATED WITH TiZrO4 NANOTUBES COMPOSITE MEMBRANE (NAFION/TiZrO4NT) FOR VANADIUM REDOX FLOW BATTERY 85
5.1 Introduction 85
5.2 Results and discussion 86
5.2.1 Characterization of metal oxide nanotubes and Nafion composite membranes 86
5.2.2 Ion selectivity measurements of Nafion composite membranes 97
5.2.3 VRFB Performance 99
5.3 Summary 108
CHAPTER VI. NAFION/TiZrO4NT COMPOSITE MEMBRANE FOR POLYOXOMETALATE REDOX FLOW BATTERY 109
6.1 Introduction 109
6.2 Results and discussion 110
6.2.1 Characterization and electrochemical activity of H6[CoW12O40] 110
6.2.2 Measurements of H+/[CoW12O40]6- selectivity 114
6.2.3 H6[CoW12O40] RFB performance 117
6.3 Summary 130
CHAPTER VII. CONCLUSIONS 131
REFERENCES 133DoctordCollectio
sj-docx-1-tct-10.1177_15330338221109798 - Supplemental material for Effect of <i>miR-196a2</i> rs11614913 Polymorphism on Cancer Susceptibility: Evidence From an Updated Meta-Analysis
No full textSupplemental material, sj-docx-1-tct-10.1177_15330338221109798 for Effect of miR-196a2 rs11614913 Polymorphism on Cancer Susceptibility: Evidence From an Updated Meta-Analysis by Md. Abdul Aziz, Tahmina Akter and Mohammad Safiqul Islam in Technology in Cancer Research & Treatment</p
sj-docx-2-jbm-10.1177_03936155221104128 - Supplemental material for Catalase C262T genetic variation and cancer susceptibility: A comprehensive meta-analysis with meta-regression and trial sequential analysis
No full textSupplemental material, sj-docx-2-jbm-10.1177_03936155221104128 for Catalase C262T genetic variation and cancer susceptibility: A comprehensive meta-analysis with meta-regression and trial sequential analysis by Md Abdul Barek, Sarah Jafrin, Md. Abdul Aziz and Mohammad Safiqul Islam in The International Journal of Biological Markers</p
sj-docx-1-tct-10.1177_15330338221123109 - Supplemental material for Susceptibility of <i>TNFAIP8</i>, <i>TNFAIP8L1</i>, and <i>TNFAIP2</i> Gene Polymorphisms on Cancer Risk: A Comprehensive Review and Meta-Analysis of Case–Control Studies
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sj-docx-1-bmi-10.1177_11772719221106600 – Supplemental material for Elevated Levels of Pleiotropic Interleukin-6 (IL-6) and Interleukin-10 (IL-10) are Critically Involved With the Severity and Mortality of COVID-19: An Updated Longitudinal Meta-Analysis and Systematic Review on 147 Studies
No full textSupplemental material, sj-docx-1-bmi-10.1177_11772719221106600 for Elevated Levels of Pleiotropic Interleukin-6 (IL-6) and Interleukin-10 (IL-10) are Critically Involved With the Severity and Mortality of COVID-19: An Updated Longitudinal Meta-Analysis and Systematic Review on 147 Studies by Sarah Jafrin, Md. Abdul Aziz and Mohammad Safiqul Islam in Biomarker Insights</p
sj-docx-1-jbm-10.1177_03936155221104128 - Supplemental material for Catalase C262T genetic variation and cancer susceptibility: A comprehensive meta-analysis with meta-regression and trial sequential analysis
No full textSupplemental material, sj-docx-1-jbm-10.1177_03936155221104128 for Catalase C262T genetic variation and cancer susceptibility: A comprehensive meta-analysis with meta-regression and trial sequential analysis by Md Abdul Barek, Sarah Jafrin, Md. Abdul Aziz and Mohammad Safiqul Islam in The International Journal of Biological Markers</p
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
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