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Post LGM Fluvial Environment and Palynological Changes of South Korea
Kim, Ju-Yong,Yang, Dong-Yoon,Bong, Pil-Yoon,Nahm, Wook-Hyun,Lee, Heon-Jong,Lee, Yung-Jo,Hong, Sei-Sun,Lee, Jin-Young,Kim, Jin-Wkan,Oh, Keun-Chang Korea Association For Quaternary Research 2003 제사기학회지 Vol.17 No.2
In Korea terrestrial fluvial sequences can be used as pedological and sedimentological markers indicating a millenium-scale environmental and climatic changes imprinted in fluvial sub-environments, which in turn are represented by the cyclicity of fluvial sands, backswamp organic muds, and flooding muds intercalations of frostcracked or dessicated brown paleosols. Post LGM and Holocene fluvial and alluvial sedimentary sequences of Korea are formed in such landscapes of coastal, floodplain, backswamp and hillslope areas. Among them, the most outstanding depositional sequences are fluvial gravels, sands and organic mud deposits in coastal, fluvial, or alluvial wetlands. The aim of this study is to explain the sedimentary sequences and palynofloral zones since the last 15,000years, on the basis of organic muds layers intercalated in fluvial sand deposits. Jangheung-ri site of Nam river, Soro-ri site of Miho river, Youngsan rivermouth site in Muan, Oksan-ri site of Hampyeong and Sanggap-ri site of Gochang are illustrated to interpret their sedimentary facies, radiocarbon datings, and palynofloral zonation. Up to the Middle to Late Last Glacial(up to 30-35Ka), old river-bed, flooding, and backswamp sequences contain such arboreal pollens as Pinus, Abies, and Picea, and rich in non-arboreal pollens like Cyperaceae, Gramineae, Ranunculaceae, and Compositae. During the LGM and post-LGM periods until Younger Dryas, vegetation has changes from the sub-alpine conifer forest(up to about 17-11Ka), through the conifer and broad-leaved deciduous forest, or mixed forest (formed during 16,680-13,010yrB.P), to the deciduous and broad-leaved forest (older than 9,500yrB.P). In the Earliest Holocene flooding deposits, fragments of plant roots are abundant and subjected to intensive pedogenic processes. During Holocene, three arboreal pollen zones are identified in the ascending order of strata; Pinus-Colyus zone(mixed conifer and deciduous broad-leaved forest, about up to 10Ka), Alnus-Quercus forest (the cool temperate deciduous broad-leaved forest, about 10Ka-2Ka), and Pinus forest (the conifer forest, about after 2Ka), as examplified in Soro-ri site of Cheonwon county. The palynological zonations of Soro-ri, Oksan-ri, Sanggap-ri, Youngsan estuary, and Gimhae fluvial plain have been recognized as a provisional correlation tool, and zonations based on fluvial backswamp and flooding deposits shows a similar result with those of previous researchers.
Kim, Yeon-Ki,Kim, Jeong-Sook,Cheong, Pil-Joong,Kim, Min-Jeong,Lee, Tae-Ho,Joo, Joung-Su,Kim, Ju-Kon,Nahm, Baek-Hie,Song, Sang-Ik The Korean Society for Applied Biological Chemistr 2009 Applied Biological Chemistry (Appl Biol Chem) Vol.52 No.3
Designing high density DNA arrays representing all the genes of an organism could be limited when the entire genome sequence of the organism is not available or if only a limited number of ESTs are available. In an effort to prepare coding sequences as DNA sources for a microarray, we found that coding region enriched genomic DNA libraries can be produced by S1 nuclease treatment of partially denatured genomic DNA. Sequence analysis of about 1,000 clones using BLASTN and BLASTX searches showed that 46% of the clones in the library have regions which share significant similarity with sequences deposited in the rice EST and nr data bases. These data suggested that clones produced in this library could be directly used as PCR templates, where the resulting PCR products could be spotted on slides for microarray analysis. This technique might be applicable in designing a high density DNA array for an organism whose entire genome sequence is not available.
Holocene Paleosols of the Upo Wetland, Korea
Nahm, Wook-Hyun,Kim, Ju-Yong,Yang, Dong-Yoon,Hong, Sei-Sun,Lee, Jin-Young,Kim, Jin-Kwan Korea Association For Quaternary Research 2003 제사기학회지 Vol.17 No.2
The Upo wetland, the largest natural wetland in Korea, is located in Changnyeong-gun, Gyeongsannam Province ($35^{\circ}33'$ N, $128^{\circ}25'$ E), and 70 km upstream from the Nakdong River estuary. Unlike most other Korean wetlands that have been destroyed under the name of economic development, the Upo wetland has been able to preserve its precious ecosystem throughout the years. Thanks to increased public awareness about natural wetlands and environmental conservation, the Korean Ministry of Environment designated the Upo wetland an 'Ecological Conservation Area' on July 26th, 1997. On March 2nd of the following year, the Upo wetland (8.54 $\textrm{km}^2$) was designated a 'Protected Wetland' in accordance with the international Ramsar Treaty. A 4.49m long (from 9.73 to 5.24 m in altitude) UP-1 core ($35^{\circ}33'05"N$, $128^{\circ}25'17"E$), recovered in the marginal part of the Upo wetland, is divided into eight buried paleosol units of different ages on the basis of the abundance of color mottles and vertical color variations (Aslan et al., 1998). Radiocarbon datings suggested that the paleosol profile represent the last 5700 years. The entire section of the core was more or less subjected to pedogenetic processes, and shows very weak to moderate soil profile development. These Holocene paleosols are therefore regarded as synsedimentary soils of deluvium (deposits formed by floods) origin (Sycheva et al., 2003). Unit 1 to 5 paleosols are generally silt-rich and exhibit moderate profile development. The boundaries between the units are somewhat distinguishable, but not so clear cut. This is due to variable repeated combination of accumulation, denudation and soil forming processes within various periods. Mottle textures gradually decrease in abundance with increasing clay content in Unit 6, which results in weak profile development. The lower boundary of Unit 6 lies around about 2000 yrBP, the beginning of Subatlantic in Korea (Kim et al., 2001). Abrupt sediment textural change is detected in Unit 7, which is interpreted to indicate the human activities on the Upo wetland. Unit 8 represents the recent soil forming processes. The preliminary results of this ongoing study imply the primary factor for pedogenetic processes is the water table fluctuations related to the sedimentary textures like grain size distributions, and the geomorphological stability of the Upo wetland.o wetland.
이성 뇌농양의 치험 1례 : Report of a Case
김종남,유동주,김성민,김영주 梨花女子大學校 醫科大學 醫科學硏究所 1991 EMJ (Ewha medical journal) Vol.14 No.2
The patient was 30 year old male having longstanding otitis media on left ear since childhood. Although he had taken radical mastoidectomy(Lt.), brain abscess was developed 14 days after operation. So, emergency craniotomy with total resection of brain abscess was performed in neurosurgery department and abscess was healed well. Postoperative course was relatively good and he was discharged on 63th postoperative day.