• Journal of Life Science
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• v.29 no.1
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• pp.123-128
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• 2019

The use of 16S rDNA is commonplace in the determination of prokaryotic species. However, it has limitations, and there are few studies at the genus level. We investigated conserved genes and metabolic pathways at the genus level in 28 strains of 13 genera of prokaryotes using the COG database (conserved genes) and MetaCyc database (metabolic pathways). Conserved genes compared to total genes (core genome) at the genus level ranged from 27.62%(Nostoc genus) to 71.76%(Spiribacter genus), with an average of 46.72%. The lower ratio of core genome meant the higher ratio of peculiar genes of a prokaryote, namely specific biological activities or the habitat may be varied. The ratio of common metabolic pathways at the genus level was higher than the ratio of core genomes, from 58.79% (Clostridium genus) to 96.31%(Mycoplasma genus), with an average of 75.86%. When compared among other genera, members of the same genus were positioned in the closest nodes to each other. Interestingly, Bacillus and Clostridium genera were positioned in closer nodes than those of the other genera. Archaebacterial genera were grouped together in the ortholog and metabolic pathway nodes in a phylogenetic tree. The genera Granulicella, Nostoc, and Bradyrhizobium of the Acidobacteria, Cyanobacteria, and Proteobacteria phyla, respectively, were grouped in an ortholog content tree. The results of this study can be used for (i) the identification of common genes and metabolic pathways at each phylogenetic level and (ii) the improvement of strains through horizontal gene transfer or site-directed mutagenesis.

• The Korean Journal of Malacology
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• v.30 no.2
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• pp.135-138
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• 2014

We report two new records Korean marine bivalves. The new record species are Siliqua albida (Adams & Reeve, 1850) and Macoma (Macoma) middendorffi Dall, 1884. As a result, the family Pharidae in Korea turned out to be 8 species of 4 genera and Tellinidae are 37 species of 15 genera.

• Korean Journal of Environmental Biology
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• v.33 no.3
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• pp.306-313
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• 2015

Four new species of the genera Masirana Komatsu, 1942 and Longileptoneta n. gen. (Araneae, Leptonetidae) are described from Gyeongsangbuk-do and Chungcheongbuk-do, Korea, under the names Longileptoneta songniensis n. sp., Masirana bonghwaensis n. sp., M. ilweolensis n. sp., and M. flabelli n. sp. A new genus, Longileptoneta n. gen., is also described.

• Journal of the Korean Mathematical Society
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• v.50 no.5
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• pp.1033-1050
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• 2013

We show the existence of smooth isolated curves of different degrees and genera in Calabi-Yau threefolds that are complete intersections in homogeneous spaces. Along the way, we classify all degrees and genera of smooth curves on BN general K3 surfaces of genus ${\mu}$, where $5{\leq}{\mu}{\leq}10$. By results of Mukai, these are the K3 surfaces that can be realised as complete intersections in certain homogeneous spaces.

• Journal of Ecology and Environment
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• v.36 no.4
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• pp.303-314
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• 2013

The present study summarized the occurrence, distribution and autecology about 31 taxa of the green algae (Chlorophytes) collected from several swamps, reservoir and highland wet-lands in the South Korea from 2010 to 2013. This paper deals with a total 31 taxa including of 26 genera which are recorded for the first time in Korea. Among these algae, 18 genera including Pyrobotrys Arnoldi, Volvulina Playfair, Dicellula Svirenko, Echinocoleum Jao & Lee, Hofmania Chodat, Gloeotila Kutzing, Tetrachlorella Korschikov, Botryospherella P.C.Silva etc., were newly recorded in Korean fresh-water algal flora.

• Ocean Science Journal
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• v.42 no.4
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• pp.255-267
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• 2007

Three brackish-water harpacticoid species belonging to the family Cletodidae are reported from the salt marshes in South Korea: Limnocletodes behningi Borutzky, 1926, L. angustodes Shen and Tai, 1963 and Kollerua longum (Shen and Tai 1979). Two genera, Limnocletodes and Kollerua, and the three species are newly added to Korean fauna. This paper deals with the redescription and systematic accounts of them, with detailed illustrations.

• The Korean Journal of Soil Zoology
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• v.1 no.2
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• pp.89-94
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• 1996

A total of 74 species belonging to 56 genera under 33 families of oribatid mites was reported from the coniferous forest in Mt. Namsan. A total of 85 species belong to 58 genera under 33 families was reported from the deciduous forest in Mt. Namsan.

• Journal of Plant Biology
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• v.37 no.2
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• pp.131-139
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• 1994

An investigation of the freshwater algal flora of Nakdong river estuary, Jinyang Lake and Danjang stream was carried out from May to November in 1993. This paper deals with a total 16 taxa belonging to 5 genera which are recorded for the first time in Korean freshwater algal flora. Among them, the 5 genera Coronastrum Thompson, Echinospaeridium Lemmermann, Dichtomococcus Korsikov, Dicloster Jao et al. and Siderocystopsis Swale are newly added to the freshwater algal flora of Korea.

• Journal of the Korean Mathematical Society
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• v.52 no.2
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• pp.225-237
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• 2015

In this article, we show that many of the genera that Giulietti and Fanali obtained from subfields of the GK curve can be obtained by using similar techniques used by Garcia, Stichtenoth and Xing. In the meantime, we obtain some new genera from the subfields of GK and generalized GK function fields.

• Korean journal of applied entomology
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• v.35 no.1
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• pp.18-37
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• 1996

Criconemoidea from Korea is reviewed; fortyfour species belong to ten genera in two families are reported hitherto. Photographs of species, host plants and keys of the genera are included.