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Recent progress in oxygen electrodes for protonic ceramic electrochemical cells
Oh Seeun,Kim Hyeonggeun,Jeong Incheol,Kim Dongyeon,Yu Hyeongmin,Lee Kang Taek 한국세라믹학회 2024 한국세라믹학회지 Vol.61 No.2
Protonic ceramic electrochemical cells, a promising technology for energy conversion and storage, have garnered significant interest in recent years owing to their superior low-temperature (< 600 °C) performance relative to solid oxide electrochemical cells. However, the sluggish kinetics of oxygen electrodes have impeded further advancements. Despite considerable research efforts, the development of practically applicable oxygen electrodes remains challenging. We herein review the recent research focusing on the fundamental understanding and development of oxygen electrode materials. Furthermore, we provide a range of material design strategies for enhancing the catalytic activity of oxygen electrodes along with a concise overview of potential derivative applications. Finally, the perspectives and potential directions for the development of oxygen electrodes for high-performance protonic ceramic electrochemical cells are presented.
매니큐어와 페디큐어 서비스가 고객 스트레스에 미치는 영향 : 기혼 직장인 여성을 중심으로
오세은 ( Seeun Oh ),정민수 ( Minsoo Jung ) 한국미용학회 2016 한국미용학회지 Vol.22 No.4
With an increase in women`s participation in public life today, working women`s occupational stress arising from changes in gender roles has emerged as an important social problem. However, insufficient are both ways to mitigate such stress in terms of beauty and health and research on related services. The current study investigated the effect of manicure and pedicure services at nail shops on married working women`s stress. The data of this study consisted of the responses of 40 married working women in their 30s living in Seoul both to nail art intervention procedures and on a stress evaluation survey. As for the dependent variable, the cognitive stress response scale was used; and the independent variable consisted of the respondents` socioeconomic characteristics. Differences in stress reduction among intervention groups were calculated by using two-way analysis of variance. According to the results of the study, stress decreased in the group who had received either manicure or pedicure service, and stress decreased significantly in the group who had received both services as well. In particular, the effect of reduction in ambivalent stress was notable among working women in their late 30s who had been married for many years when they had received both manicure and pedicure services. The current study shows that nail art intervention procedures are effective for reducing married working women`s stress. Consequently, it is necessary to systemize nail art in terms not only of beauty but also of mental health and to promote customer satisfaction and the development of related industries.
오세은 국립중앙박물관 2012 고고학지 Vol.18 No.-
This study focuses on ancient Chinese bronzeware collected in the National Museum of Korea in Seoul and the Gyeongju National Museum, classifying them into several cat egories, such as food vessels, wine vessels, and water vessels, according to their function and shape, and discussing their appearance in chronological order. The result was then used as a basic material for the discussion of the characteristic features according to the date of appearance, historic significance, and the process of changes. The ancient Chinese ritual bronzeware exhibit distinctive differences in the use of designs decorating the surface as well as vessel shapes. The decorative designs are largely divided into two types, animal designs such as Gluttonous monster design(taotie), Kui dragon design(kuilong), Niaowen Bird design, Bestial design and Coiled serpent design(Panhui), and geometric de signs such as Square design, Cloud design, and Fret design. All the designs are discussed of their characteristic features changed according to times with photos and rubbings. Another characteristic element of ancient Chinese bronzeware is Jinwen, or bronze inscriptions. These inscriptions are the origin of the Chinese writing system and historic records of the ancient society. While the inscriptions on the bronze vessels collected in the National Museum are short phrases of one or two characters, they contain important in formation of the vessels, names of the related clans, event dates, and names of those who made them. The Bronze Age in China began in the Xia Dynasty, and reached the zenith regarding the production of bronze vessels during the Shang and Zhou Dynasties. The bronze ritual vessels of the Three Dynasties were produced through the ceramic mold method which had been used until the lost-wax casting technique was introduced with Buddhist images from India. The change left its traces upon the bronze vessels, helping decide their genu ineness and production dates. 본고에서는 국립중앙박물관과 국립경주박물관 소장 중국 청동기를 먼저 식기(食器), 주기(酒器), 수기(水器) 등 용도와 기형별로 분류하고 기형의 특징에 따라 제작 시기를 편년하였다. 그리고 그 기초자료를 토대로 시대별 특징을 설명하고 기형이 가지고 있는 의의와 변천 과정을 살펴보았다. 중국 청동기는 기형과 함께 문양 또한 시기별로 대표문양과 양식의 차이를 보인다. 문양은 크게 도철문(饕餮文), 기룡문(夔龍文), 조문(鳥文), 수목문(獸目文), 반훼문(蟠虺文)의 동물문과 방격문(方格文), 운문(雲文), 뇌문(雷文) 등 기하학문으로 분류하였고, 실물 사진과 함께 문양 탁본을 게재하여 시대적 특징과 그 차이를 설명하였다. 중국 청동기가 가지고 있는 또 하나의 특징은 금문(金文)이다. 금문은 중국 한자의 기원이며 과거 고대 사회의 역사 기록물이다. 비록 국립박물관 소장 청동기는 1~2자의 단문이지만, 당시 씨족의 가족명, 사건의 날짜가 기록되는 일명(日名), 용기를 만든 자의 이름을 새겨 넣은 작가명 등이 새겨져 있는 중요한 기록이다. 중국 청동기시대는 하대(夏代)부터 시작되었고, 청동기 제작의 최고 전성기는 상주시대(商周時代)라고 할 수 있다. 이 시기를 삼대(三代)라고 하며 삼대청동기의 제작 기법은 도범법(陶范法)을 사용하였다. 후에 인도에서 불상과 함께 실납법(失蠟法)이 전해질 때까지 사용된 제작기법이며 이 흔적은 고스란히 삼대청동기에 남아 있어 진위 감정과 연대 편년에도 매우 중요한 열쇠가 된다.
Jeong, Jiwoon,Kim, Seeun,Park, Kee Hwan,Kang, Ikjae,Park, Su-Jin,Yang, Siyeon,Oh, Taehwan,Chae, Chanhee Elsevier 2018 Veterinary microbiology Vol.214 No.-
<P><B>Abstract</B></P> <P>A porcine reproductive and respiratory syndrome virus (PRRSV) modified live-virus (MLV) vaccine was evaluated under field conditions for registration as recommended by the Republic of Korea's Animal, Plant & Fisheries Quarantine & Inspection Agency. A single dose of the vaccine was administered to 1-day-old piglets and their growth performance was monitored under field conditions. Three separate farms were selected based on their history of PRRSV-associated respiratory diseases. On each farm, 40 pigs were randomly allocated to one of two treatment groups: (i) vaccinated (<I>n</I> = 20) and (ii) unvaccinated (<I>n</I> = 20) pigs at 1 day of age. Vaccinated pigs showed an increase of their market weight of 6.23 kg/pig compared to the unvaccinated pigs (98.01 kg in vaccinated group vs. 91.78 kg in unvaccinated group; <I>P <</I> 0.05) and exhibited a decrease in mortality rate by 6.7% (3.3% in vaccinated group vs. 10% in unvaccinated group; <I>P <</I> 0.05). The pigs had a sufficiently mature immune system for the vaccine to elicit humoral and cell-mediated immunity (as measured by anti-PRRSV antibodies and PRRSV-specific interferon-γ secreting cells, respectively) at 1 day of age even in the presence of maternally derived antibodies. The results presented in this study demonstrate that the PRRSV MLV vaccine is effective in improving growth performance from day 1 all the way to day 182 in endemic farms suffering with PRRSV-2 infection or both PRRSV-1 and PRRSV-2 infection.</P> <P><B>Highlights</B></P> <P> <UL> <LI> PRRSV vaccination at 1-day-old elicits anti-PRRSV antibodies even in the presence of maternally derived antibodies. </LI> <LI> PRRSV vaccination at 1-day-old induces PRRSV-specific interferon-γ secreting cells. </LI> <LI> PRRSV vaccination at 1-day-old improves growth performance from day 1 all the way to day 182 in endemic farms. </LI> </UL> </P>
MEKK1/MEKK4 are responsible for TRAIL-induced JNK/p38 phosphorylation.
Sun, Bo K,Kim, Joo-Hang,Nguyen, Hoan N,Oh, Seeun,Kim, So Y,Choi, Sujin,Choi, Hye J,Lee, Yong J,Song, Jae J National Hellenic Research Foundation 2011 ONCOLOGY REPORTS Vol.25 No.2
<P>The tumor necrosis factor-related apoptosis-inducing ligand (TRAIL) has been shown to activate mitogen-activated protein kinases (MAPKs) depending on caspase and mammalian sterile 20-like kinase 1 activations. However, the upstream molecule of MAPKs has not yet been identified. The mitogen-activated protein kinase kinase 1 (MEKK1) and the apoptosis signal-regulating kinase 1 (ASK1) are considered to be possible candidates for the action of MAPKKKs induced by TRAIL and the possibility of reactive oxygen species involvement has also been investigated. We found that MEKK1/MEKK4 as opposed to ASK1, are responsible for TRAIL-induced c-Jun NH2-terminal kinase (JNK) or p38 activation, and that their catalytic activity is repressed by the caspase-8 inhibitor, suggesting that the caspase-8 activation induced by TRAIL is indispensible for MEKK activation. The 14-3-3 관 was also shown to interact with and to dissociate from MEKK1 by TRAIL treatment, thus implicating the 14-3-3 protein as a negative regulator of MEKK1 activation. Taken together, we show herein that the upstream molecule of the TRAIL-induced MAPK activation is MEKK, as opposed to ASK1, via the mediation of its signal through JNK/p38 in a caspase-8-dependent manner.</P>