• 한국토양비료학회지
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• 제44권4호
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• pp.662-666
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• 2011

In this study, distribution characteristics of dioxins in soils in Busan, Korea were investigated regarding different land use types. Soil sampling sites that distributed through the Busan city showed dioxin concentration ranging from 0.489 to $322.736pg-TEQ\;g^{-1}$ dry weight with a mean value of $26.257pg-TEQ\;g^{-1}$ dry weight. The mean dioxin concentrations of investigated soils ranged from 1.554 to $50.357pg-TEQ\;g^{-1}$ dry weight in consideration of each land use type. That in metal refinery sites with $50.357pg-TEQ\;g^{-1}$ dry weight was higher than any other sites, followed by waste incinerator sites with $44.285pg-TEQ\;g^{-1}$ dry weight. The majority of soil samples had the same dioxin congener profiling despite the different range of dioxin concentration. Octa-CDD was the major contributor among seventeen dioxin congeners with the range from 29.5 to 70.1% in real values. In contrast to real values, dioxin congener profiles in TEQ values were dominated by 2,3,4,7,8-PeCDF which contributed about 35.3~43.8% to the total dioxin concentrations. It was judged by these results that penta-CDF was the major contributor of soil samples in Busan city. The mean ratio of PCDFs/PCDDs in real values was about 0.71, but that in TEQ values was, in contrast to it, approximately 3.03.

• 한국수산과학회지
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• 제54권4호
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• pp.397-403
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• 2021

Polycyclic Aromatic Hydrocarbons (PAHs) were analyzed and safety evaluation was carried out in Korean coastal area. The target congeners were benzo[a]pyrene, benzo[a]anthracene, benzo[b]fluoranthene, and chrysene. The method of analysis was significant. The highest PAHs 4 congener concentrations (12.2 ㎍/kg) was found in the mussel of Gangwon area. Comparison among the average concentration of PAHs for each congener showed that, benzo[a] anthracene was found in mussel (0.276 ㎍/kg), oyster (0.463 ㎍/kg), ark shell clam (1.92 ㎍/kg), and chrysene was found in mussel (0.848 ㎍/kg), oyster (1.36 ㎍/kg), scallop (0.489 ㎍/kg), sea squirt (3.07 ㎍/kg), and ark shell clam (0.449 ㎍/kg). In addition, benzo[b]fluoranthene was found in mussel (0.253 ㎍/kg), scallop (0.244 ㎍/kg), and sea squirt (1.64 ㎍/kg). The most hazardous benzo[a]pyrene was found in mussel (0.147 ㎍/kg), and scallop (0.244 ㎍/kg), it was not detected in the other shellfishes. However, all the PAHs levels recorded in this study did not exceed international MRLs. There was no significant difference among the PAHs concentration in shellfish based on sampling area or species. Body exposure was calculated based on PAHs concentration and intake rate. The results of this study indicated that PAHs in shellfish were within acceptable safe levels.

• 분석과학
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• 제19권3호
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• pp.263-271
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• 2006

변압기 절연유 중 PCBs, Co-PCBs 및 PCDD/Fs를 GC/ECD와 HRGC/HRMS를 이용하여 정량한 결과 각각 N.D.~77.3 ppm, 0.0863~2.49 ppm과 N.D.~0.00241 ppm으로 검출되었다. WHO-TEQ 농도는 Co-PCBs가 23.3~600 pgTEQ/g, PCDD/Fs가 N.D.~128 pgTEQ/g (${\Sigma}Co$-PCBs+PCDD/Fs은 24.4~728 pgTEQ/g)으로 검출되어, 총 TEQ 농도 중 PCDD/Fs가 차지하는 비율은 12% 이하였으나, 변압기 절연유 중에 미량의 다이옥신이 존재하는 것으로 나타났다. 총 10개의 시료 중 4개의 시료에서 현행 기준인 2 ppm을 초과하였으며, 시료에 따라서 Aroclor 1242, 1248, 1254 및 1260이 단품 혹은 혼합품의 형태로 포함되어 있었다. 또한 Co-PCBs와 PCDD/Fs의 농도사이에 상관성이 나타났으나 (P<0.003), 변압기의 제작년도와 농도사이에 상관성은 나타나지 않았다. Co-PCBs 이성체 분포에 있어서 non-ortho 치환 이성체에 비해 mono-ortho 이성체가 높은 비율을 차지하였으며, PCB-118 이성체가 모든 시료에서 42% 이상으로 가장 높은 비율을 차지하였다. PCDD/Fs 이성체 분포에 있어서는 OCDD가 53% 이상으로 다른 이성체에 비해 높은 비율을 차지했다. 또한 일부 시료 중 Co-PCBs의 이성체패턴은 환경 대기시료 뿐만 아니라 PCBs 제품인 Aroclor와 유사한 패턴을 나타내어, 변압기 절연유가 대기 중 PCBs의 오염원 중 하나라는 것이 시사되었다.

• Environmental Analysis Health and Toxicology
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• 제22권1호
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• pp.49-55
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• 2007

Three kind of ASE (Accelerated Solvent Extraction) and SPMDs (Semi-Permeable Membrane Devices) combined methods (ASE-SPMDs, ASE-accelerated SPMDs and SPMDs without extraction) and general Soxhlet-GPC were compared each other for the analysis of PCDD/FS in sediment. The average recovery rate of three types ASE and SPMDs combined methods (108.1%) were higher than that of the Soxhlet-GPC (79.5%) for three samples in each method using surrogate internal standards. The average coefficient of variation (10%, $2.1{\sim}25.2%$) for each congener of PCDD/Fs shows the reasonable results. Total PCDD/Fs concentrations after SPMDs without extraction were quite low, but those after ASE-SPMDs and ASE-accelerated SPMDs methods were close to the Soxhlet-GPC. Thus, the ASE-SPMDs and ASE-accelerated SPMDs methods are considered as the excellent pre-treatments method because they need less solvent and time without quality degradation.

• Animal Systematics, Evolution and Diversity
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• 제34권4호
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• pp.190-193
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• 2018

Three species of Acrolepiopsis: A. issikiella (Moriuti, 1961), A. japonica Gaedike, 1982, and A. postomacula (Matsumura, 1931), are recorded from Korea for the first time. Acrolepiopsis issikiella is characterized by having the white costal strigulae and a large dorsal patch on the forewing. Acrolepidopsis japonica is the smallest congener in Korea. Acrolepiopsis postomacula is the only Korean species of Acrolepiinae associated with Hosta. Distributions and larval biology of the three species are summarized. Two species, A. issikiella and A. japonica, are potential pest species of yam-cultivating farms in Korea. Superficial and genital features of the species, if available, are illustrated.

• Journal of Microbiology and Biotechnology
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• 제29권6호
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• pp.897-904
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• 2019

Monascus purpureus recombinant mppC and mpp7 knockout strains were subjected to extractive fermentation in the context of azaphilone pigment production. Inclusion of Diaion HP-20 resin resulted in the selective production of unreduced azaphilone congeners, in addition to the early intermediate FK17-P2a, from ${\Delta}mppC$ and ${\Delta}mpp7$ strains that would otherwise mainly produce reduced congeners. Structural determination of two novel unreduced azaphilones from the ${\Delta}mpp7$ strain was accomplished. The unreduced azaphilone compound was converted into the cognate reduced congener in recombinant M. purpureus strains, demonstrating its intermediate role in azaphilone biosynthesis. This study demonstrates the possibility that extractive fermentation with Diaion HP-20 resin can be used to obtain cryptic azaphilone metabolites.

• Animal Systematics, Evolution and Diversity
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• 제38권3호
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• pp.140-143
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• 2022

A tineid genus, Rhodobates Ragonot, 1895 in Myrmecozelinae is reported for the first time from Korea, with a congener, R. cupulatus Li and Xiao, 2006. The voucher specimens of the species comprise four males and four females collected from Seoul City, Sejong City, Gangwon-do, Chungcheongbuk-do, and Chungcheongnam-do. Among the previously-known species of Tineidae in Korea, Rhodobates cupulatus is similar to Psychoides gosari Kim and Bae in having the uniform coloration over the body and wings, but differs from the latter in the much larger body size. External appearance and genital features of R. cupulatus are redescribed and illustrated. A COI sequence of R. cupulatus is provided for the first time and compared in the world database of DNA barcodes. The Korean records of the species represent the first evidence of its occurrence out of the type locality. Circumstances of its collecting in Korea suggest that it is possibly feeding on dead woods in damp environments.

• Journal of Species Research
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• 제12권1호
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• pp.48-54
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• 2023

Foraminifera are unicellular eukaryotes widely distributed in marine and transitional marine environments. They play important roles in marine food webs and geochemical cycles and have physiological properties like the formation of calcareous tests and nitrogen respiration. Research on species diversity, distribution and endemism are essential in biogeography and biodiversity conservation. Here, we report three unrecorded species of foraminifera (Hemirotalia foraminulosa, Planispirillina denticulogranulata and Oolina brevisolenia) collected from Jeju Island and the South Sea (Korea). Planispirillina denticulogranulata is the second Planispirillina species recorded in Korea, which can be distinguished from congeners by its tubercles on the ventral side and grooves on the spiral suture. Hemirotalia foraminulosa is differentiated from the only congener H. calvifacta by multiple-scattered pits on the umbilicus, and it is the first report of Hemirotalia from Korean water. Oolina brevisolenia has specific bifurcating costae that characterize it from other congeners. This study contributes to documentation of the foraminiferal biodiversity in Korea, moreover, provides an essential basis for the expanded studies on modern foraminifera.

• 식물분류학회지
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• 제52권1호
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• pp.80-83
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• 2022

Polygonatum falcatum is a perennial herb distributed in East Asia. We determined the characteristics of the complete chloroplast genome in P. falcatum for the first time, with a de novo assembly strategy. The chloroplast genome was 154,579bp in length harboring 87 protein coding genes, 38 tRNA genes and eight rRNA genes. It exhibits typical quadripartite structure comprising a large single-copy (LSC) (83,528bp), a small single-copy (SSC) (18,457bp) and a pair of inverted repeats (IRs) (26,297bp). Phylogenetic analysis of 16 chloroplast genomes from Asparagaceae reveals that the genus Polygonatum is a monophyletic group and that P. falcatum is clustered together with the congener, P. odoratum.

• 한국식품위생안전성학회지
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• 제19권1호
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• pp.1-8
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• 2004

Polycyclic aromatic hydrocarbons(PAHs)의 인체에 대한 위해성 정도를 판단하기 위해 PAHs의 대표독성물질인 benzo(a)pyrene의 독성을 기준으로 하는 TEFs를 적용하여, PAHs의 주요노출식품에 의한 위해성 평가를 수행하였다. 숯불구이쇠고기, 숯불구이돼지고기, 숯불구이닭고기, 햄, 베이컨, 및 식용유지 등을 대상으로 PAHs 오염도를 모니터링 한 결과 숯불구이닭고기에서 총 PAMs농도가 9.3ppb로 가장 높게 검출되었으며 각각의 congener들 모두 다른 식품에서 보다 높게 나타났다. 반면에 숯불구이쇠고기, 베이컨, 숯불구이돼지고기, 햄 및 식용유지의 총 PAHs는 각각 0.2ppb, 0.3ppb, 0.7ppb, 0.8ppb 및 1.2ppb로 비교적 낮은 값을 나타냈다. TEFs값을 적용하여 환산된 오염도 값의 경우에서도 숯불구이닭고기가 가장 높은 값을 보였고, congener들의 농도를 비교했을 때 숯불구이닭고기, 숯불구이돼지고기, 베이컨, 숯불구이쇠고기 및 햄에서 모두 BaP의 농도가 각각 1.88 $\mu\textrm{g}$-TEQ$_{BaP}$/kg, 0.19 $\mu\textrm{g}$-TEQ$_{BaP}$/kg, 0.08 $\mu\textrm{g}$-TEQ$_{BaP}$/kg, 0.04 $\mu\textrm{g}$-TEQ$_{BaP}$/kg 및 0.02 $\mu\textrm{g}$-TEQ$_{BaP}$/kg로 congener들 중 가장 높게 나타났고 식용유지에서는 dibenzo(a,h)anthracene의 농도가 0.21 $\mu\textrm{g}$-TEQ$_{BaP}$/kg으로 가장 높은 값을 나타냈다. 우리나라 사람들의 PHAs 주요노출식품 섭취로 인한 만성1일 인체 노출량은 4.32${\times}$$10^{-4}$ $\mu\textrm{g}$/kg/day으로 산출되었으며 선정된 식품 중에서 숯불구이 닭고기의 노출기여도가 가장 높았다. PAMs의 초과발암 위해도는 만성1일 인체노출량과 BaP의 발암력인 7.3 (mg/kg/day)$^{-1}$을 고려하였을 때 3.44${\times}$$10^{-6}$ , 백만명당 3∼4명 수준이었다. 우리나라 대표식단을 통한 PAMs 노출량을 반영할 수 있는 위해성 평가가 추후 계속되어야 할 것으로 사료된다. 할 것으로 사료된다.