• Proceedings of the Korean Aquaculture Society Conference
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• 2003.10a
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• pp.39-39
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• 2003

Antioxidant enzyme genes play a key role in cell defense against the lethal effects of oxidative stresses in animals and have an essential function which has allowed the evolution of aerobic respiration starting from an ancient form of oxygen-insensitive life. Piscine antioxidant enzymes are also involved in the rapid response to various toxic chemicals as well as many biological stresses, indicating that they could be used as biomarkers for health and aquatic environment. With the purpose for developing fine molecular probing tool to assess the stresses in marine fish, we identified three major antioxidant enzyme genes (superoxide dismutase, catalase and glutathione-S-transferase) from Korean rock bream using expressed sequence tag analysis and/or high density filter screening. Here we report the molecular information on these gene transcripts including complete sequence data and expression profiles.

• Animal Systematics, Evolution and Diversity
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• v.10 no.1
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• pp.61-83
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• 1994

Thirty-three species or subspecies of marine peteriomorphs from Ullng Island, Korea are described . All the described species are new to the fauna of this island. Among them, five speices, Modiolus (Modiolus) comptus Sowerby, 1915, Gregareiella coralliophaga(Gmelin, 1791) , Musculus (Musculus) laevigatus (Gray, 1824), Chlamys(Coralichlamys) jousseaumei Bavay, 19.4, Spndylus (Spondylus) varius Sowerby, 1829 are newly recorded in Korean waters. These five species are redescribed.

• Animal Systematics, Evolution and Diversity
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• no.nspc3
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• pp.15-22
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• 1992

Some hypotrichous ciliates collected from the Han River and the Mountain Kwank were cultured at laboratory. They were identified as Paruroleptus lepisma Wenzel, 1953 and Euplotes aediculatus Pierson, 1943. These two species are reported for the first from Korea. Morphological and biometrical studies of them were carried out by observing both wild and cultured cells and the infraciliature of silver stained specimens. The two speices were redesribed and analyzed biometrically for their taxonomic characters.

• Animal Systematics, Evolution and Diversity
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• no.nspc3
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• pp.39-44
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• 1992

Two species of tradigrades Doryphoribius zappalai and Parhexapodibius pilatoi are redescribed, which are newly recorded from Korea.

• Animal Systematics, Evolution and Diversity
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• no.nspc3
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• pp.113-120
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• 1992

A examination of the Korean specimens of Melita koreana Stephensen and Melita rylovae Bulycheva confirmed the validity of M. rylovae. These two species and Melita setiflagella Yamato, a newly recorded species from Korea, are described and illustrated.

• Animal Systematics, Evolution and Diversity
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• no.nspc3
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• pp.59-66
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• 1992

Triops longicaudatus(LeConte, 1846), a tadpole shrimp collected from ricefields at Ch'angnyong and Sarnchonp'o, Korea, is redescribed and illustrated. This is the first record of notostracan fauna in Korea.

• Animal Systematics, Evolution and Diversity
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• v.33 no.2
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• pp.131-135
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• 2017

Asteroid specimens of the genus Luidia were collected at a depth of 95-100 m in the Korea Strait by bottom trawling in April 2016. The specimens were identified as Luidia avicularia Fisher, 1913 (Luidiidae: Paxillosida) based on morphological characteristics and molecular phylogenetic analyses, and the species is new to the Korean fauna. A 648-bp partial nucleotide sequence of mitochondrial cytochrome c oxidase I (mt-COI) gene was obtained from Korea, and then was compared to sequences of related species stored in GenBank using molecular phylogenetic analyses. No sequence differences were detected between the L. avicularia mt-COI gene sequences from Korea and China, and the species described in this report was clearly distinct from L. maculata, which was previously reported in Korean fauna. Three Luidia species have been reported in Korea.

• The Bulletin of The Korean Astronomical Society
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• v.43 no.2
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• pp.54.1-54.1
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• 2018

Recent observational studies suggest that the environmental effects can shape the evolution of galaxies in clusters. In an attempt to better understand this process, we perform idealized radiation-hydrodynamic simulations of RAM pressure stripping on star-forming galaxies using RAMSES-RT. We find that extended HI disks are easily stripped by moderate ICM winds, while there is no significant decrease in the total mass of molecular gas. RAM pressure tends to compress the molecular gas, leading to enhanced star formation especially when the gaseous disk is hit by edge-on winds. On the other hand, strong ICM winds that are expected to operate at the centre of clusters strip both HI and molecular gas from the galaxy. Interestingly, we find that the strong ICM winds can induce the formation of relatively dense (~1H/cc) HI gas clouds at a distance from the disk.

• Animal Systematics, Evolution and Diversity
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• v.28 no.1
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• pp.36-41
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• 2012

The larvae of Chaoborus are widely distributed in lakes, ponds, and reservoirs. These omnivorous Chaoborus larvae are crucial predators and play a role in structuring zooplankton communities, especially for small-sized prey. Larvae of Chaoborus are commonly known to produce predator-induced polyphenism in Daphnia sp. Nevertheless, their taxonomy and molecular phylogeny are very poorly understood. As a fundamental study for understanding the role of Chaoborus in predator-prey interactions in a freshwater ecosystem, the molecular identification and phylogenetic relationship of Chaoborus were analyzed in this study. A molecular comparison based on partial mitochondrial cytochrome oxidase I (COI) between species in Chaoborus was carried out for the identification of Chaoborus larvae collected from 2 localities in Korea. According to the results, the Chaoborus species examined here was identified as C. flavicans, which is a lake-dwelling species. Furthermore, partial mitochondrial genome including COI, COII, ATP6, ATP8, COIII, and ND3 were also newly sequenced from the species and concatenated 5 gene sequences excluding ATP8 with another 9 dipteran species were compared to examine phylogenetic relationships of C. flavicans. The results suggested that Chaoborus was more related to the Ceratopogonidae than to the Culicidae. Further analysis based on complete mitochondrial DNA sequences and nuclear gene sequences will provide a more robust validation of the phylogenetic relationships of Chaoborus within dipteran lineages.

• The Bulletin of The Korean Astronomical Society
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• v.41 no.2
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• pp.39.2-40
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• 2016

The molecular gas surrounding an H II region is thought to be a place where star formation can be induced. Such triggered star formation can arise form the overpressurization of existing density enhancements or thought the collapse of a swept up layers of material. In this talk, We will discuss the results of a study of star-formation activity associated with the outer Galaxy ring-shaped H II regions KR 7, KR 81, KR 120 and KR 140 using archival Spitzer and WISE data along with the JHK observations. We used CO data cubes from the FCRAO and TRAO in order to define extent of the molecular cloud associated each HII region. Using the infrared data sets, We identified and classified YSO populations within each molecular cloud using measures such as the class I/II ratio and YSO spatial density. Along with this, one of the main question in the study of star formation is how protostar accrete material from their parent molecular clouds and observations of infall motions are needed to provide direct evidence for accretion. Combining our observation of the YSO population distribution with time scales associated with YSO evolution and HII expansion, we investigated the possible significance of triggered star formation in the molecular cloud surrounding each region.