• Journal of Electrochemical Science and Technology
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• 제14권1호
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• pp.21-30
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• 2023

This work presents a correlation between the behavior of formic acid oxidation (FAO) on various Bi-modified Pt(poly) disk electrodes and their morphologies observed on Bi-modified Pt(111) disk electrodes using electrochemical scanning tunneling microscopy (EC-STM) to understand the effects of Bi on Pt. To distinguish the FAO activities of Bi on Pt and plain Pt around Bi, additional Pt was intentionally deposited using two different routes: direct route and iodine route. In direct route, Pt was directly deposited on Bi islands and plain Pt sites around Bi islands, while in iodine route, Pt was exclusively deposited on Bi islands by protecting plain Pt sites with adsorbed iodine. Thus, a comparison of FAO performances on the two Bi-modified Pt electrodes with additional Pt (deposited in the different ways) disclosed a difference in FAO performances on plain Pt sites and Bi islands. When Bi coverage was ~0.04, the Bi deposits were scattered Bi islands enhancing FAO on Pt(poly). The additional Pt deposits using direct route increased FAO efficiency, while the ones using iodine route slightly decreased FAO current. The EC-STM observations indicated that Pt deposits around Bi islands, not on Bi islands, were responsible for the FAO current increase on Bi-modified Pt(poly). The FAO efficiency on Bi-modified Pt(poly) with a Bi coverage of ~0.25 increased by a factor of 2. However, the additional Pt deposits using the two Pt deposition routes notably decreased the FAO current. The dependency of FAO on Bi coverage was discussed in terms of electronic effect and ensemble effect.

• 대한두개안면성형외과학회지
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• 제10권1호
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• pp.40-43
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• 2009

Purpose: Extensive midface defect following total maxillectomy with orbital exenteration and cheek skin resection should be three dimensionally reconstructed with a large flap that have a sufficient volume of tissue and multiple skin islands. We describe our transverse rectus abdominis myocutaneous(TRAM) free flap with three skin islands which was successfully used in this situation. Methods: A 58-year-old man was performed enbloc total maxillectomy including orbital contents and wide cheek skin because of invasive maxillary squamous cell carcinoma. He was immediately reconstructed with TRAM flap that was designed not vertical but transverse fashion for providing sufficient skin area. Also, deepithelialization procedure making for multiple skin islands was done in flap insetting period when appropriate modification according to the intraoperative situation was possible. Dead space was completely obliterated by bulky muscular tissue, and three skin islands were used for lining of lateral nasal wall, palatal surface, and cheek skin restoration. Results: Postoperative course was satisfying. Maintaining of proper ipsilateral nasal airway, loss of rhinolalia and oronasal regurgitation of food particles, and restoration of cheek contour were successfully obtained. Conclusion: We report clinical experience of threedimensional reconstruction using free TRAM flap after total maxillectomy with orbital exenteration.

• 한국균학회지
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• 제44권1호
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• pp.16-22
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• 2016

본 연구에서는 충남 서해안에 분포하는 5개의 섬 지역(신진도, 마도, 대난지도, 원산도, 삽시도)과 육지 해안 지역인 무창포의 근권 토양내 수지상균근균 군집 구조의 차이점을 확인해보았다. 그 결과 충남 지역에서 국내 미기록종인 Acaulospora brasiliensis, Redeckera fulvum를 포함하여 14개 속 24종의 수지상균근균을 확인하였다. 또한 대부분의 섬 지역에서 Acaulospora 속이 우점하고 있음을 확인할 수 있었으며, 섬 지역의 근권에서는 육지 지역과는 다른 수지상균근균 군집 구조가 발달함을 보여주었다. 특히 섬 간의 수지상균근균 군집은 섬들 사이의 물리적 거리가 가까울수록 더 유사하게 발달하는 것을 확인하였다.

• 한국자원식물학회지
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• 제25권1호
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• pp.105-122
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• 2012

본 조사는 당진, 서산, 태안, 홍성, 보령, 서천 등 충남 도서지역의 관속식물 분포를 연구하기 위해 2010년 3월부터 11월까지 조사하였으며, 본 조사를 통해 확인된 조사지역 내의 소산 관속식물은 105과 326속 454종 4아종 45변종 9품종으로 총 512분류군으로 확인되었다. 조사지역내의 한국특산식물은 벌개미취, 키버들, 좀땅비싸리, 태안원추리, 새끼노루귀, 고광나무 등 총 6분류군으로 확인되었으며, 산림청지정 희귀 및 멸종위기 식물은 목련, 모감주나무, 먹넌출, 갯방풍 등 총 4분류군이 확인되었다. 식물구계학적 특정종은 I등급종은 50분류군, II등급종은 1분류군, III등급종은 11분류군, IV등급종은 4분류군, V등급종은 3분류군으로 총 69분류군이 확인되었다. 기후변화와 관련한 연구 결과에 의한 기준으로 보면 남방계가 14분류군, 북방계가 4분류군이 확인되었다. 귀화식물은 17과 46분류군으로 확인되었으며, 이는 조사된 전체 소산 식물목록 중 약 9.1%를 차지하고 있었다. 귀화식물은 군락을 형성하지 않은 상태로 주변 도서지역의 식생에 큰 영향을 주지 못하는 것으로 확인되었다. 하지만, 도서지역 간에 정기적으로 여객선이 오가며 관광객이 증가함에 따라 종수가 증가하고, 주변 도서지역에 많은 영향을 미칠 것으로 사료된다.

• Proceedings of the National Institute of Ecology of the Republic of Korea
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• 제3권1호
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• pp.23-31
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• 2022

The analysis of seven islands in Gogunsan archipelago, Korea with insect fauna and vascular plant flora was carried out based on a field survey conducted in May, July, and September. As a result, a total of 2,817 insect individuals including 264 species and 315 taxa of vascular plant were recorded. Bangchukdo the largest island among the seven islands showed the largest number both insect species and plant taxa. The similarity analysis suggested that the nearness of each island strongly affected the insect fauna and vascular plant flora on each island. In addition, there was significant correlation between the areas of each island and the numbers of insect species (Spearman's correlation coefficient=0.857, P-value=0.014). In the future, the results of this study can be used as data related to island ecology and conservation.

• Animal Bioscience
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• 제37권10호
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• pp.1683-1691
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• 2024

Objective: Yellow Korean native chicken (KNC-Y) is one of the five pure Korean indigenous chicken breeds that were restored through a government project in 1992. KNC-Y is recognized for its superior egg production performance compared to other KNC lines. In this study, we performed runs of homozygosity (ROH) analysis to discover selection signatures associated with egg production traits in the KNC-Y population. Methods: A total of 675 DNA samples from KNC-Y were genotyped to generate single nucleotide polymorphism (SNP) data using custom 60K Affymetrix SNP chips. ROH analysis was performed using PLINK software, with predefined parameters set for the analysis. The threshold of ROH island was defined as the top 1% frequency of SNPs withing the ROH among the population. Results: In the KNC-Y population, a total of 29,958 runs of homozygosity (ROH) fragments were identified. The average total length of ROH was 120.84 Mb, with each ROH fragment having an average length of 2.71 Mb. The calculated ROH-based inbreeding coefficient (F_ROH) was 0.13. Furthermore, we revealed the presence of ROH islands on chromosomes 1, 2, 4, 5, 7, 8, and 11. Within the identified regions, a total of 111 genes were annotated, and among them were genes related to economic traits, including PRMT3, ANO5, HDAC4, LSS, PLA2G4A, and PTGS2. Most of the overlapping quantitative trait locus regions with ROH islands were found to be associated with production traits. Conclusion: This study conducted a comprehensive analysis of ROH in the KNC-Y population. Notably, among the findings, the PTGS2 gene is believed to play a crucial role in influencing the laying performance of KNC-Y.

• 해양안보
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• 제3권1호
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• pp.211-235
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• 2021

1982년 4월 2일부터 6월 14일까지 지속한 포클랜드제도 분쟁 결과, 영국은 전쟁 승리를 통해 극심한 경제불황의 위기를 넘어 과거 화려한 대영제국의 영광을 되찾을 수 있었다. 반면 아르헨티나는 군사독재 정권의 몰락과 민주정권의 탄생에 지대한 영향을 받는다. 본 연구는 포클랜드분쟁에 관해 "DIME on PMESII"를 적용함으로써, 미래 독도에서 발생 가능한 해양분쟁 대응전략을 제시하고자 작성되었다. 특히 분쟁지역을 실효적으로 지배하고 있는 국가가 가진 총체적 국력의 수단으로서 외교·정보·군사·경제, 즉 DIME 능력이 어떤 영향을 미치는지 분석하였다. 동시에 반대 시야에서 해당지역을 실효적으로 지배하지 못하는 국가의 정치·군사·경제·사회·정보 및 기반시설, 즉 PMESII 체계를 적용해 분석하였다. 연구 결과, 독도 해양분쟁 관련 대응전략으로 첫째, 영국과 같이 분쟁영토에 대한 실효적 지배를 효과적으로 지속하고 강화해나가야 한다. 이를 통해, 국민에 대한 애국심 고취 및 전시정부에 대한 지지, 정당한 전쟁명분의 확보, 국제적인 지지를 얻을 수 있다. 둘째, 현대 전쟁을 분석할 때 자국의 DIME 능력을 상대국의 PMESII 체계 약점에 집중하는 'DIME on PMESII'가 효과적임을 증명할 수 있었다. 이제는 전쟁을 수행하는 데 있어 군사력만으로 상호 충돌하는 형태가 아니라 국가의 총체적인 국력인 외교·정보·경제분야 능력을 즉각적으로 투입해야 한다. 셋째, 미래 독도 해양분쟁에 대한 철저한 대비가 필요하므로, 해양에서의 제한된 국지전 가능성을 극복하기 위해 주변국에 대한 적절한 전략이 필요하다.

• 농촌의학ㆍ지역보건
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• 제29권1호
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• pp.195-206
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• 2004

충남도내 18개 도서지역의 의료 이용행태와 의료이용을 결정하는 요인을 알아보기 위해 2002년 9월 9일부터 9월 18일까지 조사한 결과는 다음과 같다. 조사대상자의 외래 의료이용 횟수는 연령이 높을수록, 교육수준이 낮을수록 많았고 주관적 건강상태가 나쁠수록 의료이용 횟수가 높았고 통계적으로 유의하였다(p<0.05). 유병 만성질환수가 많을수록 외래 의료이용이 많았고, 의료기관 접근시간이 2시간이상 3시간 미만인 군에서 외래 의료이용 횟수가 높게 나타났다(p<0.05). 의료기관 입원 횟수는 상용치료원이 종합병원인 군에서 가장 높게 나타났고 통계적으로 유의하였다(p<0.05). 의료기관의 입원 횟수에 영향용 미치는 변수로는 주관적 건강상태로 나타났으나(p<0.05) 그 설명력이 미약하였다.

• ALGAE
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• 제28권1호
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• pp.53-62
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• 2013

Actinotrichia is a calcified galaxauracean red algal genus with temperate and tropical distributions in the Indian and Pacific Oceans. Morphological characteristics, along with rbcL and cox1 sequences, were analyzed from specimens collected in the western Pacific and the Indian Oceans. Both rbcL and cox1 data confirmed the occurrence of A. fragilis, A. robusta, and Actinotrichia sp. in this region. The presence of A. fragilis was verified in tropical Indo-Pacific and temperate northeast Asian waters and was characterized by high genetic diversity. Although A. robusta commonly occurs in the East China Sea, we confirmed its presence on rocks and crustose algae in the subtidal zone of three islands in the Andaman Sea. Actinotrichia sp. was similar to A. calcea in morphology and distribution, but with sufficiently different sequences, thus, additional sampling over the range will enable a more realistic evaluation of its taxonomic status.

• 한국정보디스플레이학회:학술대회논문집
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• 한국정보디스플레이학회 2002년도 International Meeting on Information Display
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• pp.694-696
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• 2002

Growth behaviors of carbon nanotubes (CNTs) are studied in terms of catalyst by using scanning electron microscopy and transmission electron microscope (TEM). Catalyst films deposited on various substrates are agglomerated into nano-islands during the heat-up to the growth temperature. In particular, we focus on the direct investigation of the microstructures of the CNTs and the interface of CNTs-catalyst-substrate using cross-sectional TEM. We investigate relationship to the subsequent CNTs growth on each nucleation site. The growth of CNTs depends on the catalyst itself but not the silicide formation between the catalyst and the substrate.