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[PB-0061] Assessment of Mesocotyl Elongation in Doubled Haploid Rice (Oryza sativa L.)
Simon Alibu(Simon Alibu ),Nkulu Rolly Kabange(Nkulu Rolly Kabange ),Youngho Kwon(Youngho Kwon),Ji-Yun Lee(Ji-Yun Lee),So-Myeong Lee(So-Myeong Lee),Jin-Kyung Cha(Jin-Kyung Cha),Dongjin Shin(Dongjin Shi 한국육종학회 2022 한국육종학회 공동학술발표집 Vol.2022 No.-
Kim, Wan Sik,Anoop, Gopinathan,Jeong, Il-Seok,Lee, Hye Jeong,Kim, Hyun Bin,Kim, Soo Hyeon,Goo, Gi Won,Lee, Hyunmyung,Lee, Hyeon Jun,Kim, Chingu,Lee, Joo-Hyoung,Mun, Bongjin Simon,Park, Ji-Woong,Lee, E Elsevier 2020 Nano energy Vol.67 No.-
<P><B>Abstract</B></P> <P>For next-generation energy harvesting thermoelectric (TE) devices based on organic/inorganic composites, the barrier energy at interfaces of components is critical in determining the TE performances, because the barrier energy can directly enhance Seebeck coefficient (<I>S</I>). We have succeeded in precisely tuning the barrier energy in poly (3,4-ethylene dioxythiophene) polystyrene sulfonate (PEDOT:PSS)/Bi<SUB>2</SUB>Te<SUB>3</SUB> nanowires (NWs) based organic/inorganic nanocomposite films through polar solvent vapor annealing (PSVA). Controlling the PSS/PEDOT ratio as a function of PSVA duration, the work function of PEDOT:PSS was tuned, which eventually varied the barrier energy of nanocomposite thin films. Through optimization of Bi<SUB>2</SUB>Te<SUB>3</SUB>/PEDOT:PSS barrier energy, the <I>S</I> was maximized up to 47 μV/K. The electrical conductivity was also maximized simultaneously, because of the PSVA-induced <I>π-π</I> stacking among PEDOT chains and templating effect. Density functional theory calculated an optimal barrier energy (0.12 eV), which showed an excellent agreement with our experimentally determined optimal barrier energy (0.11 eV), at which we also maximized the power factor—an efficiency indicator of TE performance. Our feasible strategy on the manipulation of barrier energy in PEDOT:PSS/Bi<SUB>2</SUB>Te<SUB>3</SUB> NWs through the PSVA can be extended to other organic/inorganic based TE composites, toward the realization of highly efficient TE devices.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We tuned the barrier energy of PEDOT:PSS/Bi<SUB>2</SUB>Te<SUB>3</SUB> nanowires through simply varying the PSVA duration. </LI> <LI> Simultaneous enhancement of Seebeck and electrical conductivity is achieved by optimizing the barrier energy. </LI> <LI> We achieved a power factor maximum of 223 μW/mK<SUP>2</SUP> when the barrier energy, Δ<I>E</I>=0.11 eV, at PSVA duration for 120 min. </LI> <LI> The optimized barrier energy for the enhanced Seebeck coefficient agrees well with the DFT calculated Δ<I>E</I> of 0.12 eV. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Enhanced and balanced efficiency of white bi-directional organic light-emitting diodes.
Lee, Jonghee,Cho, Hyunsu,Koh, Tae-Wook,Yun, Changhun,Hofmann, Simone,Lee, Jae-Hyun,Kim, Yong Hyun,L?ssem, Bj?rn,Lee, Jeong-Ik,Leo, Karl,Gather, Malte C,Yoo, Seunghyup Optical Society of America 2013 Optics express Vol.21 No.23
<P>We report on the characteristics of enhanced and balanced white-light emission from bi-directional organic light-emitting diodes (BiOLEDs) enabled by the introduction of micro-cavity effects. The insertion of an additional metal layer between the indium tin oxide anode and the hole transporting layer results in similar light output of our BiOLEDs in both top and bottom direction and in reduced distortion of the electroluminescence spectrum. Furthermore, we find that by utilizing MC effects, the overall current efficiency can be improved by 26.2% compared to that of a conventional device.</P>
Lee, Jonghee,Koh, Tae-Wook,Cho, Hyunsu,Hofmann, Simone,Reineke, Sebastian,Lee, Jae-Hyun,Lee, Jeong-Ik,Yoo, Seunghyup,Leo, Karl,Gather, Malte C. Elsevier 2015 Organic Electronics Vol.26 No.-
<P><B>Abstract</B></P> <P>White organic light-emitting diodes (WOLEDs) are one of the most promising technologies to realize future solid-state lighting with high power efficiency, broad and adjustable spectral coverage, and area emission for more effective and natural illumination. In this work, we report a new method of tuning the correlated color temperature (CCT) of WOLEDs via spatially controlling the degree of the micro-cavity effect in an OLED. Varying the width of thin Ag strips deposited on top of a transparent electrode leads to changes in both intensity and phase of reflection at the anode, hence significantly altering emission spectra of proposed WOLEDs. CCT of the implemented WOLEDs span a wide range, from 3000K to 8000K, demonstrating that our proposed approach helps to meet the need for lighting with various CCTs.</P> <P><B>Highlights</B></P> <P> <UL> <LI> We report a correlated color temperature (CCT) tunable white OLEDs. </LI> <LI> Micro-cavity (MC) effect in an OLED was controlled with a striped thin metal layer. </LI> <LI> MC effect alters emission spectra and intensity of white OLEDs. </LI> <LI> CCT of the implemented white OLEDs span a wide range, from 3000K to 8000K. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>White organic light-emitting diodes (WOLEDs) are one of the most promising technologies to realize future solid-state lighting with high power efficiency, broad and adjustable spectral coverage, and area emission for more effective and natural illumination. In this work, we report a new method of tuning the correlated color temperature (CCT) of WOLEDs via spatially controlling the degree of the micro-cavity effect in an OLED. Varying the width of thin Ag strips deposited on top of a transparent electrode leads to changes in both intensity and phase of reflection at the anode, hence significantly altering emission spectra of proposed WOLEDs. CCT of the implemented WOLEDs span a wide range, from 3000K to 8000K, demonstrating that our proposed approach helps to meet the need for lighting with various CCTs.</P> <P>[DISPLAY OMISSION]</P>
Design Principle of Fe-N-C Electrocatalysts: How to Optimize Multimodal Porous Structures?
Lee, Soo Hong,Kim, Jiheon,Chung, Dong Young,Yoo, Ji Mun,Lee, Hyeon Seok,Kim, Min Jeong,Mun, Bongjin Simon,Kwon, Soon Gu,Sung, Yung-Eun,Hyeon, Taeghwan American Chemical Society 2019 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.141 No.5
<P>The effect of porous structures on the electrocatalytic activity of N-doped carbon is studied by using electrochemical analysis techniques and the result is applied to synthesize highly active and stable Fe-N-C catalyst for oxygen reduction reaction (ORR). We developed synthetic procedures to prepare three types of N-doped carbon model catalysts that are designed for systematic comparison of the porous structures. The difference in their catalytic activity is investigated in relation to the surface area and the electrochemical parameters. We found that macro- and mesoporous structures contribute to different stages of the reaction kinetics. The catalytic activity is further enhanced by loading the optimized amount of Fe to prepare Fe-N-C catalyst. In both N-doped carbon and Fe-N-C catalysts, the hierarchical porous structure improved electrocatalytic performance in acidic and alkaline media. The optimized catalyst exhibits one of the best ORR performance in alkaline medium with excellent long-term stability in anion exchange membrane fuel cell and accelerated durability test. Our study establishes a basis for rationale design of the porous carbon structure for electrocatalytic applications.</P> [FIG OMISSION]</BR>
How Much is Luke’s Pentecostal Spirit “the Spirit of Prophecy”?
Lee, SeungHyun Simon 한국신약학회 2014 신약논단 Vol.21 No.2
한스 폰 베어는 사도행전에 등장하는 성령의 본질에 관하여 다음과 같이 질문하였다: “누가에게 있어서 성령은 종말론적인 아들 됨과 새 언약 안에서의 삶을 위한 능력인가? 아니면 선교를 위한 능력 부어주심인가?” 이 질문에 답하면서, 전통적인 오순절계통의 학자들은 누가의 성령을 선교를 위한 능력 부어주심이라고 주장하였다. 물론 어떤 오순절 계통의 학자들은 성도로서의 봉사를 위한 다른 선물들도 동반된다고 주장하였다. 이들의 주장에 반하여, 제임스 던은 오순절 성령의 본질은 단순한 예언자적 능력 부어주심을 뛰어넘는 선물이라고 주장한다. 던은 누가의 성령은 종말론적인 자녀 됨의 근원으로서 새로운 언약 안에서의 삶을 가능케 하는 원칙이라고 주장한다. 이 둘간의 오래된 논쟁을 해결하고자 맥스 터너는 두 견해들의 중간적인 입장을 취하고자 한다. 한편으로, 오순절 계통의 학자들의 견해에 동의하면서 터너는 주장하기를, 사도행전에서의 성령은 유대인들의 예언의 영에 대한 기독교적인 변형이라고 말한다. 그런 반면에, 던의 견해에 동의하면서 터너는 누가의 예언의 영은 역시 인간의 구원에 관여하는 구원의 주체라고 주장한다. 그러나 본 저자의 견해로는, 터너나 오순절 계통의 학자들이 누가의 오순절 성령과 동일시하는 “예언의 영”이라는 개념이 누가 당시의 유대인들의 사상에서 고정된 개념으로 존재하고 있었는지에 대해서 의문이 든다. 특히, 누가가 인용하고 있는 이사야서와 요엘서는 하나님의 영을 ‘예언의 영’ 혹은 ‘예언자의 영’이라고 전제하고 있는가? 뿐만 아니라, 구약 성경과 유대인들의 사상에서 하나님의 영의 역할이 인간의 구원 혹은 능력 부어주심이라는 두 가지 다른 형태로 구분되어 존재하고 있었는지에 대해서도 다시 살펴보아야 한다. 따라서 본 저자는 이 논문에서 누가가 사용하는 유대인 전통에서의 하나님의 영에 대한 본질을 위의 질문들을 중심으로 하여 다시 살펴보고자 한다. Hans von Baer raised a question regarding the nature of the Spirit in Acts: “Was the Spirit for Luke the power of eschatological sonship and new covenant life or was it for empowering for mission?” Answering this question, traditional Pentecostal scholars consider Luke’s Spirit as prophetic empowerment for mission, either exclusively, or with other endowments for Christian service. Countering the Pentecostal claim, James D. G. Dunn argues that the essence of the gift of the Spirit at Pentecost is more than prophetic empowerment for mission. Luke’s Spirit is the source of eschatological sonship and new covenant life. In the midst of this ongoing battle, Max Turner attempts to chart a mediating course between Dunn’s view and the Pentecostal view. On the one hand, Turner argues that the Holy Spirit in Acts is an exclusively “Christianized version of the Jewish Spirit of Prophecy.” On the other hand, Turner agrees with Dunn that the Spirit of Prophecy is also responsible for the salvation of humanity. In the current author’s opinion, however, it seems to be questionable whether the Spirit of Prophecy existed as a fixed or semi-fixed concept of the Spirit of God in the Judaism of Luke’s day. It is also doubtful whether the two seemingly different patterns of the roles of the Spirit existed in the Hebrew Bible and Judaism as distinctive and separate categories as has been argued. In this article, the author would like to reexamine the idea of the Spirit in Luke’s Jewish sources.