• Animal Systematics, Evolution and Diversity
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• v.23 no.2
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• pp.241-245
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• 2007

A corophiin species, Sinocorophium sinensis (Zhang, 1974) collected from oyster beds of Sacheon, southern coast of Korea is described and illustrated. Specimens of present study look more similar to those of China than those of Japan.

• Animal Systematics, Evolution and Diversity
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• v.24 no.2
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• pp.225-227
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• 2008

Tiphia sulcatus Kim and Han, sp. nov., is described based on specimens collected in Korea. In addition, a diagnosis, and digital images are provided.

• Animal Systematics, Evolution and Diversity
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• v.25 no.3
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• pp.265-267
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• 2009

The rare species, Cleptes galloisi Uchida, is redescribed based on the type material. In addition, male characters hitherto unknown are given with newly found specimens from Korea. Digital images of both sexes are provided.

• Animal Systematics, Evolution and Diversity
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• v.25 no.1
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• pp.137-139
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• 2009

Marine sponges were collected from Tongyeong yachtschool harbor, Korea in 2008. Among them Halichondria (Halichondria) bowerbanki Burton, 1930 is newly recorded in the Korean fauna.

• Animal cells and systems
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• v.8
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• pp.40-40
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• 2004

• Korean Chemical Engineering Research
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• v.53 no.5
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• pp.531-539
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• 2015

Chlor-alkali industry is one of the largest electrochemical processes which annually producing 70 million tons of sodium hydroxide and chlorine from sodium chloride solution. $DSA^{(R)}$ (Dimensionally Stable Anodes) electrodes such as $RuO_2$ and $IrO_2$, which is popular in chlor-alkali process, have been investigated to improve the chlorine generation efficiency. Although DSA electrode has been developed with various researches, understanding of the chlorine evolution mechanism is essential to the development of highly efficient DSA electrode. In this review paper, chlorine generation mechanisms are summarized and that of key factors are identified to systematically understand the chlorine generation mechanism. Rate determining step, effect of pH, reaction intermediate, and electrode crystal structure were intensively overviewed as key factors of the chlorine mechanism.

• Biomolecules & Therapeutics
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• v.21 no.6
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• pp.487-492
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• 2013

Cytochrome P450 4A11 (CYP4A11) is a fatty acid hydroxylase enzyme expressed in human liver. It catalyzes not only the hydroxylation of saturated and unsaturated fatty acids, but the conversion of arachidonic acid to 20-hydroxyeicosatetraenoic acid (20-HETE), a regulator of blood pressure. In this study, we performed a directed evolution analysis of CYP4A11 using the luminogenic assay system. A random mutant library of CYP4A11, in which mutations were made throughout the entire coding region, was screened with luciferase activity to detect the demethylation of luciferin-4A (2-[6-methoxyquinolin-2-yl]-4,5-dihydrothiazole-4-carboxylic acid) of CYP4A11 mutants in Escherichia coli. Consecutive rounds of random mutagenesis and screening yielded three improved CYP4A11 mutants, CP2600 (A24T/T263A), CP2601 (T263A), and CP2616 (A24T/T263A/V430E) with ~3-fold increase in whole cells and >10-fold increase in purified proteins on the luminescence assay. However, the steady state kinetic analysis for lauric acid hydroxylation showed the significant reductions in enzymatic activities in all three mutants. A mutant, CP2600, showed a 51% decrease in catalytic efficiency ($k_{cat}/K_m$) for lauric acid hydroxylation mainly due to an increase in $K_m$. CP2601 and CP2616 showed much greater reductions (>75%) in the catalytic efficiency due to both a decrease in $k_{cat}$ and an increase in Km. These decreased catalytic activities of CP2601 and CP2616 can be partially attributed to the changes in substrate affinities. These results suggest that the enzymatic activities of CYP4A11 mutants selected from directed evolution using a luminogenic P450 substrate may not demonstrate a direct correlation with the hydroxylation activities of lauric acid.

• Animal Systematics, Evolution and Diversity
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• v.27 no.3
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• pp.271-273
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• 2011

The Korean occurrence of Holopyga generosa (F$\ddot{o}$rster, 1853) is reported here for the first time. The genus is also new to Korea. This species might be easily distinguished from other Holopyga species by its relatively long hairs on the head and mesosoma. Diagnosis and digital images are provided.

• Animal Systematics, Evolution and Diversity
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• v.33 no.3
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• pp.203-210
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• 2017

A taxonomic review of the Korean Lycocerus (Cantharidae, Coleoptera) was presented. Through this study, total of four species were found from Korea including a species new to Korea, Lycocerus striatus. We newly provided a key to the Korean Lycocerus species and the distributional map on each species in this study.

• Animal Systematics, Evolution and Diversity
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• v.26 no.1
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• pp.87-91
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• 2010

Two species of xanthids, Actaea polyacantha (Heller, 1861) and Actaeodes hirsutissimus (R$\ddot{u}$ppell, 1830) collected from Jejudo Island, are newly recorded from Korean waters. Korean Xanthidae now consists of 22 species belonging to twenty genera.