• 한국환경과학회지
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• 제31권9호
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• pp.781-791
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• 2022

In order to investigate the characteristics of the effects of various emission sources such as ships around the Busan North Port area, PM_2.5 samples were analyzed by SEM/EDS (scanning electron microscopy with energy dispersive x-ray spectrometer). In the port city Busan, the main emission source of PM_2.5 is ships, and soot was observed as the main exhaust particles of a ship diesel engine. As a result of the individual particle analysis of PM_2.5 at the sampling site, carbonaceous particles such as soot and water droplet-shaped, which are considered to be exhausted from ships, were constantly observed. And some spherical Fe-rich particles also appeared.

• 한국독성학회:학술대회논문집
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• 한국독성학회 2001년도 International Symposium on Dietary and Medicinal Antimutgens and Anticarcinogens
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• pp.177-177
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• 2001

Polychlorinated biphenyls(PCBs) are members of the halogenated aromatic group of environmental pollutants. Because of their unique physical and chemical properties, notably their stability and widespread use, PCBs are sidely distributed and transported throughout the global environment. In fact, residues of PCBs have been identified in air, water, aquatic and marine sediments, and human tissue samples.(omitted)

• 환경생물
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• 제31권3호
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• pp.213-224
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• 2013

새만금호는 만경강과 동진강에서 유입되는 담수를 통해 영양염을 지속적으로 공급받아 부영양이 가속화되고 있었다. 또한 담수 유입에 따라 구역별로 환경요인들이 차이를 보이고 있었다. 이러한 환경의 차이는 식물플랑크톤 군집의 출현양상의 변화를 가져오고 있었다. 새만금호의 부영양화된 수계에서 식물플랑크톤 군집은 개체수가 증가하고 종 다양성이 감소하고 있었으며, 와편모조류 등의 일부 종이 대발생을 일으키고 있었다. 특히 2009년에는 기존에 크게 출현하지 않았던 Heterocapsa triquetra, Karlodinium veneficum, Heterocapsa rotundata가 우점하여 새만금호 내부의 부영양화에 따른 수환경변화로 식물플랑크톤 군집에 변화가 나타났다. 이와 같이, 새만금호의 서식환경의 변화는 와편모조류의 적조발생 등 식물플랑크톤 군집의 환경 적응력과 연관하여 파악하여야 하며, 이를 위해서는 지속적인 모니터링이 필요하다.

• 한국환경과학회지
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• 제14권2호
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• pp.121-128
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• 2005

Hexachlorobenzene (HCB) was analyzed in various marine organisms of Korea. HCB was detected in all organism samples with residual concentrations from 0.51 to 222 pg/g wet weight. HCB residue was the highest content in crustacean, and followed by bivalves, fish, cephalopods and gastropods. The residues were comparable to or lower than those in marine organisms of other countries. Daily dietary intake of HCB from seafood was estimated to be 13.4 pg/kg body weight/day. The relative contribution of taxonomic group to the total dietary intake of HCB were in the order of crustaceans $(40.1\%)$, bivalves $(34.2\%)$, fish $(23.1\%)$, cephalopods $(2.22\%)$, and gastropods $(0.38\%)$. Daily dietary intake of HCB expressed as toxic equivalent (TEQ) value was estimated to be $1.34\times10^{-3}pg$ TEQ/kg body weight/day. This value did not exceed tolerable daily intake (TDI) proposed by the WHO, the UK toxicity committee and the KFDA. Cancer risk and target hazard quotient (THQ) due to the consumption of the marine organism in Korean adult population were evaluated using the exposure equation of food ingestion. This result suggests that dietary intake of HCB by the consumption of Korean seafood seems to be safe for human health with negligible cancer and non-cancer risks so far.

• 환경생물
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• 제35권3호
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• pp.273-288
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• 2017

An investigation focusing on the unrecorded and taxonomically undescribed indigenous has been done since 2006. Samples were collected from various sites in the coastal and offshore waters of Korea as well as around Jeju Island. Since 2008, 16 unrecorded species belonging to the family Gymnodiniaceae have been found. The species were as follows: Amphidinium thermaeum (2015), Cochlodinium convolutum (2015), C. strangulatum (2015), Gymnodinium abbreviatum (valid name: G. gracile), G. arenicola (2015), G. gracile (2015), G. dorsalisulcum (2015), G. microreticulatum (2014), G. micrum (2016) (valid name: Karlodinium micrum), G. pyrenoidosum (2016), G. simplex (2015), G. veneficum (2016) (valid name: Karlodinium veneficum), Gyrodinium aureum (2015), G. fusiforme (2015), G. dominans (2014), and Nusuttodinium latum (2016) (valid name: Amphidinium latum). (The numbers in parentheses refer to the year that the species was found). These species were newly recorded in Korean waters in this study.

• 환경생물
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• 제35권3호
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• pp.251-264
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• 2017

A study searching for unrecorded and taxonomically undescribed indigenous species has been conducted since 2006. Samples were collected from many sites in coastal waters and offshore in Korea as well as around Jeju Island. Since 2008 we have found 13 unrecorded species belonging to family Diplopsaliaceae, Heterocapsaceae, Kolkwitziellaceae, Protoperidiniaceae and Thoracosphaeraceae. The species are as follows, Preperidinium meunieri (2014), Heterocapsa ovata (2015), H. pseudotriquetra (2015), Diplopsalis lenticula (2008), Protoperidinium abei (2009), P. diabolus var. longipes (2010), P. depressum (synonym: P. parallelum (2008)), P. latispinum (2016), P. punctulatum (2010), P. solidicorne (synonym: P. spinosum (2010)), P. subpyriforme (2010), P. pacificum (2013), Scrippsiella hexapraecingula (2009) (note; The numbers in parenthesis refer to the year that the species was reported as unrecorded indigenous species by National Institute of Biological Resources, NIBR hereafter). Among these, 5 species were described as newly recorded species in Korean waters, and 8 were re-described in this study.

• 한국환경농학회지
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• 제35권2호
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• pp.137-142
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• 2016

BACKGROUND: Identification of endophytic yeasts inhabiting the internal roots of the Mankyua chejuense tree requires techniques involving biotechnology. There is a need for a culture-based method to isolate and identify yeast strains associated with M. chejuense.METHODS AND RESULTS: We spread homogenized M. chejuense root samples onto glucose-peptone- yeast agar containing antibiotics, Triton X-100, and L-sorbose. A total of 152 yeast isolates were obtained and identified via phylogenetic analysis based on ITS gene sequencing. The results revealed that the root-associated yeast species included the genera Cyberlindnera (140 isolates), Candida (11 isolates), and Kluyveromyces (one isolate). Additionally, three yeast isolates showed high bioethanol production.CONCLUSION: We identified the specific yeast community associated with M. chejuense roots. These yeast isolates may have industrial applications as bioethanol producers. Our findings revealed that Cyberlindnera isolates included C. suaverolens and C. satumus, while Kluyveromyces isolates showed high bioethanol production.

• 환경생물
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• 제36권3호
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• pp.260-270
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• 2018

A study describing unrecorded and taxonomically undescribed indigenous species is in progress since 2006. Samples were collected from many sites in coastal waters and offshore of Korea as well as from Jeju Island. Since 2008, we have found ten unrecorded species of four genera belonging to family Dinophysaceae, Gonyaulacaceae, Gymnodiniaceae, and Heterocapsaceae. The species are as follows, Dinophysis elongata (2016 winter), D. nasuta (2016 winter), Gonyaulax alaskensis (2016 winter), G. diegensis (2017), G. monospina (2008), Amphidinium flagellans(2017), Heterocapsa circularisquama (2017), H. horiguchii (2017), H. lanceolata (2017), and H. pygmaea (2017) (note; The numbers in the parenthesis refer to the year in which the species was reported as unrecorded indigenous species by National Institute of Biological Resources, NIBR hereafter). Among them, seven species were described as newly recorded species in Korean waters, and three have been re-described in this study.

• 환경생물
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• 제36권3호
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• pp.252-259
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• 2018

A research probing for the unrecorded and taxonomically undescribed indigenous species has been initiated since 2006. Samples were collected from an intertidal zone along the coasts of Korea as well as around the Jeju Island. We have found five unrecorded species of four genera belonging to the order Dinophysiales, Gymnodiniales, Peridiniales, and Prorocentrales. The species are as follows, Sinophysis canaliculata (2017) Bispidodinium angelaceum (2015), Cabra armorica (2016), Prorocentrum bimaculatum (2017), and P. tsawwassenense (2017) (note; The numbers in parenthesis refer to the year in which the species was reported as unrecorded indigenous species by National Institute of Biological Resources, NIBR hereafter).

• 환경생물
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• 제33권4호
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• pp.403-411
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• 2015

본 연구는 외부 해수가 계속적으로 유입되는 개방형 인공생태계와 해수의 유입이 없는 폐쇄형 인공생태계에서 미소생태계의 변화를 파악하고자 실험실 내에서 100 L 크기의 인공해양소형생태계 연구를 수행하였다. 수온은 폐쇄형 및 개방형 인공생태계에서 큰 차이가 없었다. 염분은 폐쇄형 생태계에서 수체의 증발에 따라 증가를 보였고 용존산소 및 용존무기질소 농도는 폐쇄형에서 감소하는 반면, 개방형에서는 초기농도와 큰 차이를 보이지 않았다. 용존무기인 및 용존규소는 두 시스템에서 차이가 없었다. 식물플랑크톤은 폐쇄형에서 감소를 하였던 반면, 개방형에서는 증가 양상을 보였으나 Autotrophic nanoflagellates는 식물플랑크톤 개체수의 변동과 반대되는 양상을 보였다. 타가영양세균은 폐쇄형에서 증가하는 양상을 보였고, 이와 함께 heterotrophic nanoflagellates 및 섬모충이 시간차를 두어 증가하는 양상을 보였다. 그러나, 개방형 인공생태계에서는 특이한 변화를 나타내지 않았다. 결론적으로, 폐쇄형 인공생태계와 개방형 인공생태계에서 미소생물상 및 환경요인들의 변화의 연구는 향후 연구자들이 인공생태계 연구에 있어서 기초자료로 활용할 수 있을 것으로 기대하며, 신뢰성 있는 인공생태계 연구를 수행할 수 있을 것으로 판단된다.