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Park, Hae-Kyung;Kim, Hwabin;Lee, Jay J.;Lee, Jae-An;Lee, Haejin;Park, Jong-Hwan;Seo, Jungkwan;Youn, Seok-Jea;Moon, Jeongsuk
- Journal of Korean Society on Water Environment
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- v.27 no.4
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- pp.491-498
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- 2011
We investigated the ranges of total cellular microcystins content of cyanobacterial blooms collected in Korean lakes and rivers from 2005 to 2009. The amount and composition of microcystins of Korean cyanobacteria varied depending on the sampling water bodies and dominant cyanobacterial genera. Toxic cyanobacterial cell numbers equivalent to $1{\mu}g$ MCYSTs/L using total cellular microcystin content of Korean cyanobacteria were in the range of 2,348 to 66,980,638 cells/mL. Only four samples among forty nine samples showed less cell numbers than current criterion of Harmful Algae Alert System, 5,000 cells/mL indicating current criterion do not reflect properly the microcystins content of Korean cyanobacteria. Anabaena and Aphanizomenon spp. showed three to six times higher cell numbers equivalent to $1{\mu}g$ MCYSTs/L than Microcystis spp. To propose criteria of Harmful Algae Alert System for Korean toxic cyanobacteria, we calculated about 50% selective geometrical means of cyanobacterial cell numbers equivalent to $1{\mu}g$ MCYSTs/L in order of toxic content. The proposed criteria for Microcystis, Oscillatoria, Anabaena, and Aphanizomenon spp., are 10,000, 20,000, 40,000, and 80,000 cells/mL, respectively.
https://doi.org/10.15681/KSWE.2011.27.4.13 인용 PDF KSCI

Park, Sung-Kyu;Ha, Kwang-Tae;Kim, Sung-Dan;Kim, Si-Jung;Lee, Yun-Jung;Lee, Kyeong-Ah;Jang, Jung-Im;Jeong, Sam-Sik;Song, Bu-Young;Jo, Suk-Ju;Jo, Han-Bin;Choi, Byung-Hyun;Kim, Min-Young
- Journal of Food Hygiene and Safety
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- v.24 no.1
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- pp.27-37
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- 2009
In an effort to evaluate the currents in pesticide residues, 3,020 agricultural products were tested by multiresidue method with 260 pesticides, obtained from the circulation market of in the Gangbuk province in 2007.20.4%(616/3020) of the products were determined to contain pesticides residues, but only 4.1%(124/3020) of these were deemed to be unsuitable by the korea Food Code. Unsuitably products were spinach(21.0%), perilla leaf(17.3%), ulgari(13.6%), leek(12.4%), crowndaisy(12.4%), asterscaber(12.4%), chard(11.1%). Detected pesticides were procymidone(3.9%), endosulfan(2.6%), chlorfenapyr(2.2%), bifenthrin(1.3%), cypermethrin(0.7%), metalaxyl(0.9%), azoxystrobin(0.3%) and chlorothalonil(0.7%). Sixty-four pesticides were detected and 11 pesticides were newly detected in 2007. Thirty-one pesticides in agricultural products exceeded their MRLs.
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Seo, Minjeong;Hong, Juhee;Rhee, Hojun;Park, Jinsol;Lim, Hakmyeong;Park, Myung Kyu;Min, Byungchul;Park, Eun Sun;Lee, Sanghoon;Kim, Hanjun;Ha, Kwangtae;Kwon, Seungmi;Shin, Jinho;Lee, Jaein;Hwang, Youngok;Oh, Younghee;Shin, Yongseung
- Particle and aerosol research
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- v.18 no.2
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- pp.23-35
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- 2022
Recently, passengers using public transport are concerned about the effects of COVID-19 and fine dust. Therefore, from February 2020 to February 2021, we investigated whether SARS-CoV-2 RNA was detected even after disinfection in 55 public transportation places visited by confirmed patients in Seoul. 34 air samples and 702 object surface samples were collected and tested with RT-PCR, one surface sample was positive. In addition, preemptive investigations were conducted in 22 subway trains that passengers were being on board at that time. 1,018 preemptive tests were performed, and all were negative. Although PM-2.5 is dangerous in itself, it can be a potential carrier of viruses. It seemed that a solution was needed as one line continuously exceeded the criteria of PM-2.5. Through this study, it is judged that cluster infection in public transportation can be prevented if efforts to reduce the concentration of fine dust, appropriate disinfection management, and personal disinfection such as wearing a mask in public transportations.
https://doi.org/10.11629/jpaar.2022.18.2.023 인용 PDF KSCI