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- 저자 : Hui-Seung Kang (검색결과 253 건)
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고용석,강찬순,최보경,김혜수,홍정희,최명신,김상현,장성재,김길수 식품의약품안전청 2001 식품의약품안전청 연보 Vol.5 No.-
Headspace-GC(딘5-GC)를 이용하여 ICH 잔류웅매 가이드라인 class 1, 2에 속하는 28종의 잔류유기웅매 분석방법을 연군한 결과 SPB-5, BB-WAX column을 동시 이용하여 각각을 확인, 정량할 수 있었다.또한 염의 참가효과, 평형시간,평형온도가 headspace분석에 미치는 영향을 검토한 결과 평형 시간 30분,평형온도 85℃,Na₂SO₄Ig을 첨가하여 시험할 때 최적 부넉조건을 나타내었다. 회수율은 1,1-achloroethene(68.3%)를 제외하고 90.9 ~ 114.5%로 패체적으로 양호하였다. 따로 HS-GCJECD, DB-524 column을 이용하여 9종의 잔류유기용매에 대하여 각각의 검랸선을 작성하고 검출한계를 구하였다. 실제 의약품 원료 10종및 제제 5종에 적용시킨 결과 모두 불검출되었으며 본 시험법은 의약품중의 잔류유기용매 분석에 적용할 수 있는 방법이라고 판단된다. The headspace-fC/FID(HS -GC/FID) method was performed for test method developnlent of residu;31 organic solvents in pfrarmaceuticals. Using SPB-S and BB-WAXcolumn, 28 kinds of solvents iri ICH residual sof)·ents guidetine class 1, 2 couBd be individuallt-identified and quantitated. The foIBowing residoal soIYents were not detected by the headspaceinjection condition : N,N-Cmethylacetamide, N,N-dimeth)rlformamide, ethyfeneglycol, formamide,2-methoryethanot, N-rnethylpyrrolidone, suBforane. The effects of the addition of salts,equilibration time, and equilibration temperature on headspace analt·sis were invesugated. Theoptimum conditions weiFe obtained with addtion of Ifa2s04 19 as a salt, simultaneously. thetime and temperature of equitibration were 30min and 8i'f, respectivety. The recovery havefound between 90.9 and 114.5% except 1,1-dichloroethene(fi8.3%). Using DB-624 column &HS-GC/:ECD method, 9 kinds of residual solvents could be individually identified andfuantitated. This HS-GC method can be applied to test the residua3 organic solvent in thepharmaceuticals.
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우리나라 청정지역에서 측정한 PM_(2.5) 입자의 특성
이종훈,김용표,문길주,김희강,정용승,이종범 江原大學校 附設 環境硏究所 1998 環境硏究 Vol.15 No.-
Atmospheric fine particles (PM_(2.5)) were collected at the background sites, Kangwha, Taean, and Kosan and characterized to understand their behaviors at the sites. Daily samples of PM_(2.5) mass were measured and ionic species, carbonaceous species, and gaseous species were analyzed. Four-daγ backward trajectory analysis was also carried out. The mean concentrations of anthropogenic species were highest at Kangwha among three sites, while contributions from sea salts were highest at Taean during the measurement period due to higher wind speed at Taean. Major chemical components in fine particles were sulfates organic carbon, nitrate, and ammonium. Most of the non-sea-salt (nss) sulfates in PM_(2.5) might be present as ammonium sulfates at these sites. Most air parcels arriving at Kangwha and Taean were from northern China. Therefore, both sites were thought to be affected by the same air parcel. At Kosan, during the measurement period, air parcels were from either northern China or southern China. The nss sulfate concentration in the air parcels from southern China was higher, while the nss calcium nitrate, and ammonium concentrations were higher when the air parcels were from northern China.
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Hui-Seung Kang,김종찬,하상도,정승원,장미 한국응용생명화학회 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.6
Gwamegi (semidry Pacific saury [Cololabis saira]) is a Korean food made by a traditional method of repeated freezing and de-freezing during winter. The present study aimed at developing predictive modeling of S. aureus growth on Gwamegi as a function of temperature (10–35oC). Modified Gompertz,Baranyi, and logistic primary models were fitted to experimental values. Polynomial quadratic, nonlinear Arrhenius and square root models were selected as secondary models and analyzed using specific growth rate (μmax) and lag time (λ) values obtained from the primary models. Based on the optimized models derived from the Baranyi and square root equations for μmax, its r2 and mean square error (MSE) were 0.991 and 0.00058, and bias factor (Bf)and accuracy factor (Af) were 1.0087 and 1.0801, respectively. The logistic and polynomial quadratic equations for λ, its r2 and MSE were 0.989 and 0.22834, Bf and Af were 0.9742 and 1.0271,respectively. These predictive models can provide basic information for quantitative microbial risk assessment of Gwamegi and other processed semidried seafood.
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The Quality Characteristics of Commercial Gwamegi by Product Types
Hui-Seung Kang,Seung-Weon Jeong,Jong-Cheul Ko,Mi Jang,Jong-Chan Kim 한국식품영양과학회 2011 Preventive Nutrition and Food Science Vol.16 No.3
This study was performed to investigate the physical, chemical and microbial characteristics of Gwamegi to provide basic data for the standardization of marine processed foods and for the improvement of the quality of commercial Gwamegi. The acid values of commercial Gwamegi were 5.8, 5.3 and 5.2 mg KOH/g for fillet type (F-type), “two divide” type (T-type) and whole type (W-type), respectively, and the peroxide values were 51.6, 51.5 and 53.2 meq/kg for each. There was a positive correlation between the acid value and the peroxide value (r=0.555) at confidence intervals (CI) of 99%. Trimethylamine (TMA) content of F-type, T-type and W-type products were 2.9, 2.6 and 3.6 mg%, respectively, while volatile basic nitrogen (VBN) contents were 22.4, 21.5 and 21.8 mg%. There was a strong positive correlation between TMA and VBN (r=0.961) at a CI of 99%. The histamine content was detected to be as much as 122 mg/kg, with about 36 % of the samples exceeding the CODEX criteria for histamine of 100 mg/kg. The total microbial count of 4 products exceeded 5 Log CFU/g and coliform group of 11 products exceeded the criteria of less than 1 Log CFU/g. Staphylococcus aureus in 27% of the samples exceeded the criteria of less than 2 Log CFU/g.
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The Quality Characteristics of Commercial Gwamegi by Product Types
Kang, Hui-Seung,Jeong, Seung-Weon,Ko, Jong-Cheul,Jang, Mi,Kim, Jong-Chan The Korean Society of Food Science and Nutrition 2011 Preventive Nutrition and Food Science Vol.16 No.3
This study was performed to investigate the physical, chemical and microbial characteristics of Gwamegi to provide basic data for the standardization of marine processed foods and for the improvement of the quality of commercial Gwamegi. The acid values of commercial Gwamegi were 5.8, 5.3 and 5.2 mg KOH/g for fillet type (F-type), "two divide" type (T-type) and whole type (W-type), respectively, and the peroxide values were 51.6, 51.5 and 53.2 meq/kg for each. There was a positive correlation between the acid value and the peroxide value (r=0.555) at confidence intervals (CI) of 99%. Trimethylamine (TMA) content of F-type, T-type and W-type products were 2.9, 2.6 and 3.6 mg%, respectively, while volatile basic nitrogen (VBN) contents were 22.4, 21.5 and 21.8 mg%. There was a strong positive correlation between TMA and VBN (r=0.961) at a CI of 99%. The histamine content was detected to be as much as 122 mg/kg, with about 36 % of the samples exceeding the CODEX criteria for histamine of 100 mg/kg. The total microbial count of 4 products exceeded 5 Log CFU/g and coliform group of 11 products exceeded the criteria of less than 1 Log CFU/g. Staphylococcus aureus in 27% of the samples exceeded the criteria of less than 2 Log CFU/g.
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Kang, Hui-Seung,Han, Songyi,Cho, Byung-Hoon,Lee, Hunjoo The Korean Society of Fisheries and Aquatic Scienc 2019 Fisheries and Aquatic Sciences Vol.22 No.12
Veterinary drugs are widely used to protect production-related diseases and promote the growth of farmed fish. The use of large amounts of veterinary drugs may have potential risk and cause adverse effects on both humans and the environment. In this study, we developed risk-based ranking based on a scoring system to be applied in the national residue program. In this approach, the following three factors of veterinary drugs that may occur as residues in fishery products were considered: potency (acceptable daily intake), usage (number of dose and withdrawal period), and residue occurrence. The overall ranking score was calculated using the following equation: potency × usage (sum of the number of sales and withdrawal period) × residue occurrence. The veterinary drugs that were assigned high score by applying this approach were enrofloxacin, amoxicillin, oxolinic acid, erythromycin, and trimethoprim. The risk-based approach for monitoring veterinary drugs can provide a reliable inspection priority in fishery products. The developed ranking system can be applied in web-based systems and residuemonitoring programs and to ensure safe management of fishery products in Korea.
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Kang, Hui-Seung,Ha, Sang-Do,Jeong, Seung-Weon,Jang, Mi,Kim, Jong-Chan The Korean Society for Applied Biological Chemistr 2013 Applied Biological Chemistry (Appl Biol Chem) Vol.56 No.6
Gwamegi (semidry Pacific saury [Cololabis saira]) is a Korean food made by a traditional method of repeated freezing and de-freezing during winter. The present study aimed at developing predictive modeling of S. aureus growth on Gwamegi as a function of temperature ($10-35^{\circ}C$). Modified Gompertz, Baranyi, and logistic primary models were fitted to experimental values. Polynomial quadratic, nonlinear Arrhenius and square root models were selected as secondary models and analyzed using specific growth rate (${\mu}_{max}$) and lag time (${\lambda}$) values obtained from the primary models. Based on the optimized models derived from the Baranyi and square root equations for ${\mu}_{max}$, its $r^2$ and mean square error (MSE) were 0.991 and 0.00058, and bias factor ($B_f$) and accuracy factor ($A_f$) were 1.0087 and 1.0801, respectively. The logistic and polynomial quadratic equations for ${\lambda}$, its $r^2$ and MSE were 0.989 and 0.22834, $B_f$ and $A_f$ were 0.9742 and 1.0271, respectively. These predictive models can provide basic information for quantitative microbial risk assessment of Gwamegi and other processed semidried seafood.
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Hui-Seung Kang,Songyi Han,Byung-Hoon Cho,Hunjoo Lee 한국수산과학회 2019 Fisheries and Aquatic Sciences Vol.22 No.4
Veterinary drugs are widely used to protect production-related diseases and promote the growth of farmed fish. The use of large amounts of veterinary drugs may have potential risk and cause adverse effects on both humans and the environment. In this study, we developed risk-based ranking based on a scoring system to be applied in the national residue program. In this approach, the following three factors of veterinary drugs that may occur as residues in fishery products were considered: potency (acceptable daily intake), usage (number of dose and withdrawal period), and residue occurrence. The overall ranking score was calculated using the following equation: potency × usage (sum of the number of sales and withdrawal period) × residue occurrence. The veterinary drugs that were assigned high score by applying this approach were enrofloxacin, amoxicillin, oxolinic acid, erythromycin, and trimethoprim. The risk-based approach for monitoring veterinary drugs can provide a reliable inspection priority in fishery products. The developed ranking system can be applied in web-based systems and residuemonitoring programs and to ensure safe management of fishery products in Korea.
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