• Proceedings of the Korean Society of Soil and Groundwater Environment Conference
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• 2003.09a
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• pp.438-441
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• 2003

The present study reports the novel physiological function of dissimilatory perchlorate reduction by two strains JB101 and JB109 isolated from a sewage treatment facility in Incheon, South Korea. The physiological data of the isolates showed good correspondence with the members of the family Enterobacteriaceae. The partial 16S rRNA and 16S rDNA sequence of strains JB101 and JB109 showed similarity of 99.8% to Citrobacter amalonaticus and 98% to Citrobacter farmari, respectively. The study infers toward possibility of Citrobacter spp. to form an important group of dissimilatory perchlorate reducers within the (equation omitted) subclass of Proteobacteria because the majority of the known. members belong to two monophyletic groups namely Dechloromonas and Dechlorosoma in $\beta$ subclass of Proteobacteria.

• Korean Journal of Environmental Biology
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• v.38 no.1
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• pp.160-164
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• 2020

Papenfussiella densa was described as Papenfussiella kuromo f. densa from Japan by Inagaki in 1958. P. densa has been recognized as an endemic and independent species based on the molecular analyses of type material without detailed morphological observations. In this study, Papenfussiella densa is reported as a new record from Dok-do, South Korea, based on morphological and molecular analyses. Papenfussiella densa is mainly characterized as having narrow, branched, slimy, and tomentose thalli with branchlets, partially hollow in the medulla of the middle part. The molecular analyses of the chloroplast rbcL-rbcS DNA sequence of the Papenfussiella densa sample from Korea revealed that it matched that of P. densa from Japan and was nested in the clade of Papenfussiella. There was only a 0.02% gene sequence divergence between the Korean and Japanese samples. We report P. densa as a new record from Korea and add this species to the list of Korean macroalgal flora.

• Proceedings of the KSEEG Conference
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• 2005.04a
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• pp.189-189
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• 2005

• Journal of Environmental Science International
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• v.7 no.2
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• pp.123-132
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• 1998

The experiment was performed to elucidate the effect of simulated acrid rain on growth of the seven crops(caucus carota vu sativa DC. , Fagopyrum esculenkm Moench, Brassica cmpespis subsp. napus var. pekinensis Makino , Raphuus satlws vu. hortensis for. acnMormis Makino, Brassica dbogjabra Bailey, Caphslcum mum L., and Perilla frutescens Britton). The pH levels of simulated acid rain ranged pH 3.1, 3.6, 4.1, 4.6, 5.1 and 5.6. The germination 10 each crop was influenced from stimulated acrid rain except buckwheat and kale. A general decrease of growth in crops was observed with Increasing pH concentrations. The pattern of soluble protein was observed a tendency to decrease from acidic pH eradlents. According to acidity, total DNA contents of each crop was showed a definite reduction. In conclusion, plant growth was stimulated decreasln and the chanties of total Protein Patterns and BNA contents extracted from leaves trended with stimulated acrid rain was showed seriously.

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2004.05a
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• pp.122-122
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• 2004

• Proceedings of the Korea Environmental Mutagen Society Conference
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• 2004.05a
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• pp.91-91
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• 2004

• Korean Journal of Environmental Biology
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• v.39 no.3
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• pp.399-405
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• 2021

Until now, five species (Meghimatium bilineatum, M. fruhstorferi, Limax flavus, L. marginatus, Deroceras reticulatum) in three genera of families Philomycidae and Limacidae have been reported in Korea. Philomycidae is a family of air-breathing land snails. Meghimatium hongdoensis sp. nov. is described based on its middle size (60-80 mm in body length), its body coloration (dark-red yellow), no dorsal with streaks, its genitalia, and 16rDNA sequence analysis. Specimens of this new species were collected from Hongdo island, Sinan-gun, Jeollanam-do, Korea. This species is only known from the type locality at Hongdo to date. It could be found in high-humidity sites. Meghimatium uniforme (Laidlaw 1937) was the first one reported in Korea. It was also collected from Gageodo island, Sinan-gun, Jeollanam-do, Korea. In this study, morphological characteristics including their radula and genital structures of these two species were described. Preliminary results of mitochondrial 16S rDNA sequencing and phylogenetic analyses indicated that these species belonged to the Korean clade.

• Korean Journal of Environmental Biology
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• v.39 no.2
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• pp.236-244
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• 2021

Unarmored dinoflagellates, in the family Kareniaceae, include harmful or toxic bloom-forming species, which are associated with massive fish kills and mortalities of marine organisms worldwide. The occurrence and distribution of the toxigenic species in the family Kareniaceae were investigated in the brackish and coastal waters of Korea between July 2018 and October 2020. During the survey, we collected seven newly recorded species; Karenia papilionacea, Karlodinium digitatum, Karl. veneficum, Karl. zhouanum, Takayama acrotrocha, T. helix, and T. tasmanica. A total of fifteen strains of the seven taxa were successfully established as clonal cultures and examined using LM, SEM, and molecular phylogeny inferred from LSU rDNA sequences. Herein, we present the taxonomic information, morphological features, and molecular phylogenetic positions of the unrecorded dinoflagellate species collected from Korean coastal waters.

• Korean Journal of Environmental Biology
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• v.39 no.4
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• pp.573-580
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• 2021

Unarmored and thin-walled dinoflagellates were collected from brackish and coastal waters of Korea from August 2019 to August 2021. A total of 10 species belonging to orders Sussiales and Gymnodiniales were isolated and established as clonal cultures. Of them, five species (Biecheleria brevisulcata, Lepidodinium chlorophorum, Karlodinium decipiens, Kirithra asteri, and Wangodinium sinense) are newly recorded in Korea and examined using a light microscope (LM) and a scanning electron microscope (SEM). Their molecular phylogeny was inferred from LSU rDNA sequences. Here, we present taxonomic information, morphological features, and molecular phylogenetic positions of these unrecorded dinoflagellate species.

• Review of KIISC
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• v.28 no.5
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• pp.15-19
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• 2018

사물인터넷 기술은 기본적으로 다양한 대규모의 IoT 디바이스가 인터넷에 연결되어 디바이스로부터 수집되는 데이터을 통해 스마트한 서비슬 제공하는 기술이다. 그러나, 이런한 환경은 역으로 다양한 사양의 다비이스가 네트워크에 연결되기 때문에 가장 취약한 지점으로 통해 IoT 네트워크를 공격할 수 있게 된다. 따라서, 저사양 IoT 디바이스일지라도 전제 연결 네트워크의 보안 수준에 걸맞는 보안강도를 보장해야 하는 다소 역설적인 상황에 봉착하게 된다. 이러한 상황을 해결하기 위해 저사양 IoT 디바이스의 보안을 강화할 수 있는 기술이 시급하다고 할 수 있다. 본 논문에서는 이를 위해 PUF 개념을 일반화하여 디바이스 DNA라는 새로운 개념을 정의하고 기본적인 디바이스 DNA의 성질을 바이오인식 기술에서 차용하여 설명하고자 한다.