• Korean Journal of Medicinal Crop Science
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• v.24 no.2
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• pp.121-128
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• 2016

Background: Turmeric (Curcuma longa L.) that is used as a food material has antioxidant, anticancer and anti-inflammatory properties. Recently the demand for functional foods and drugs has increased. The present study was carried out to determined of contents of residual sulfur dioxide, heavy metals, ash, acid insoluble ash and curcuminoids in turmeric from the Seoul Yak-ryeong market. Methods and Results: A total of 31 samples were obtained. Residual sulfur dioxide was not detected in any samples. Heavy metals (arsenic, cadmium, lead and mercury) were analyzed by ICP-MS (Inductively Coupled Plasma Mass Spectrometer) and a mercury analyzer and were detected in the ranges of 0.00 - 0.28, 0.00 - 0.07, 0.00 - 0.29 and 0.002 - 0.027mg/g respectively. No significant difference were observed between the average heavy metal contents of domestic and imported tumeric. However, average content of ash in domestic samples (7.8%) were significantly higher than that in imported samples (6.1%), whereas that of curcuminoids was significantly higher in imported samples (47.6mg/g) than in domestic samples (11.2mg/g). The average content of acid insoluble ash was not significantly different between two sample types (0.9% in each). Conclusions: There are no specific standards for turmeric used as food materials. Therefore, this study can be provided as basic data for the establishment of quality standards for turmeric.

• Korean Journal of Medicinal Crop Science
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• v.18 no.5
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• pp.338-344
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• 2010

Our paper shows the results of 302 samples of herb medicines about fungal contamination at Yakyeang markets in Seoul. The sample medicines were treated VICAM pretreatment and analysed by post column derivatisation procedure(PHRED-HPLC) with a fluorescence detector. Aflatoxin B1 was founded from 50.3% of samples, aflatoxin B2 was 39.7%, aflatoxin G1 was 21.2% and aflatoxin G2 was 23.5%. The detected ranges of aflatoxin B1, B2, G1 and G2 were from 0.1 to $57.2\;{\mu}g/kg$, 0.1 to $42.6\;{\mu}g/kg$, 0.1 to $23.5\;{\mu}g/kg$ and 0.1 to $9.5\;{\mu}g/kg$ respectively. Among total samples, 26 samples contained aflatoxin B1 violated the regulation (less than 10 ug/kg) for aflatoxin B1 of KFDA. From the result, we could presumed that more than a half of samples were contaminated by aflatoxins. Therefore, it seems to be necessary that the new safety giudeline will be established aflatoxin B2, G1 and G2 from herb medicines as aflatoxin B1.

• Journal of Food Hygiene and Safety
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• v.30 no.4
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• pp.366-371
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• 2015

This work was conducted to apply the multi class pesticide multiresidue method for determining the use of hexaconazole in the agricultural products using GC-NPD. The multi class pesticide multiresidue method results were validated for the assay of hexaconazole by using linearity, accuracy, precision, limit of detection and quantitation. The linearity in the concentration ranged from 0.025 to 5.0 mg/L ($R^2$ > 0.999). Lettuce recoveries ranged from 89.42% to 94.15% with relative standard deviations below 7.78%, for spiking levels from 0.04 to 4.0 mg/kg. The limit of detection was 0.04 mg/kg, and the limit of quantitation was 0.11 mg/kg. The intra- and inter-day precisions were 2.42~3.49% and 4.90~7.78%, respectively. We suggested that the multi class pesticide multiresidue method for determining hexaconazole was highly accurate and reproducible, and it will be used as a routine analysis in agricultural products.

• Journal of Environmental Health Sciences
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• v.32 no.4 s.91
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• pp.249-253
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• 2006

This survey study was performed to evaluate the pollution level of playgrounds for children at 49 different sampling sites in Seoul metropolitan. Results were as follows. 1. Soil pH ranged from 6.0 to 9.2. 2. Average concentrations of heavy metals were 0.101 mg/kg of Cd, 4.470 mg/kg of Cu, 0.10 mg/kg of As, 5.35 mg/kg of Pb, 0.017 mg/kg of $Cr^{6+}$ 0.0051 mg/kg of Hg, which were lower than Korean soil precaution level. 3. The SPCs of all areas were below 100, which is 1st grade. In conclusion, the pollution level of playgrounds for children was safe.

• Korean Journal of Food Science and Technology
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• v.53 no.3
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• pp.239-244
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• 2021

In the present study, liquid chromatography tandem-mass spectrometry was used to conduct a risk assessment of ethoxyquin and ethoxyquin dimer residues in 288 farmed fish sold in wholesale and traditional markets in Seoul. The detection range (detection rate) of ethoxyquin and ethoxyquin dimer was 0.005~0.309 mg/kg (4.9%) and 0.001~2.828 mg/kg (69.8%), respectively. Ethoxyquin was detected only in freshwater eels, loaches, catfish, and flatfish, whereas ethoxyquin dimer was present in all fish species. To estimate the dietary exposure levels of ethoxyquin and ethoxyquin dimer, the hazard index, calculated using the acceptable daily intake and estimated daily intake, ranged from 0.001 to 0.300%. Our results indicate that there is no significant exposure risk to humans from these farmed fish despite 10 farmed fish samples exceeding the maximum residue level (1.0 mg/kg as the sum of ethoxyquin and ethoxyquin dimer).

• Journal of Environmental Health Sciences
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• v.26 no.4
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• pp.65-74
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• 2000

The sensitivity of a mehtanogen and sulfate-reducing bacterium isolated from a sea-based landfill site Cd$^{2+}$ and CU$^{2+}$ was studied. Methanogens and sulfate-reducing bacteria in leachates of the waste disposal site were enumerated using the MPN method. Methanobacterium thermoautotrophicum KHT, isolated from the leachate, could not grow at 0.5 mM Cd$^{2+}$ or 1.0 mM CU$^{2+}$. Desulfotomaculum sp. RHT, isolated from the same leachate, was able to insolubilization 3.0 mM Cd$^{2+}$ or 2.0 mM CU$^{2+}$ by production of hydrogen sulfide. When strains KHT and RHT were cultured together in the presence of the heavy metals, strain KHT could grow at high heavy metal concentrations after insolubilization of the metals by strain RHT. strain RHT.

• The Korean Journal of Archival Studies
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• no.39
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• pp.45-72
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• 2014

In the recent years, Gov.2.0, which strengthens not only a claim for freedom of information but also sharing public information, became a new paradigm of government operations. In line with the paradigm the Korean government promotes the Gov.3.0 policy. This study exams the freedom of information system, which expends its roles and responsibilities for enhancing the usage of public information in the Gov.3.0 era. Furthermore, it analyzes the system's usability from the perspective of users. The freedom of information system is the fundamental portal for all the public information's disclosure and usage. Without providing the solution for problems of the system, the Korean government's Gov3.0 policy cannot succeed. Also, Park Geun-hye Government's Gov.3.0 initiatives which consists of tasks, such as reinforcing freedom of information, immediate releasing original documents, and expending public access to information, should be done through the freedom of information system. The importance of the system is increasingly heavy. It is not only the simple online contact point for public information, but also a public sphere for sharing public raw data and for implementing the Gov.3.0 vision. However, the current system still does not slove it problems. This study analyzes the system's problems in terms of usability and sustainability. As a result, it provides three alternative strategies for the freedom of information system, including 'personnel and financial support expansion', 'strengthening user-friendly operating' and 'establishing long-term strategies for system improvement.

• Korean Journal of Food Science and Technology
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• v.43 no.6
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• pp.702-710
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• 2011

The occurrence of aflatoxins $B_1$, $B_2$, $G_1$ and $G_2$ in nuts, their products and dried fruits was investigated. Samples were collected from local markets in Seoul and analyzed by rapid resolution liquid chromatography coupled with tandem mass spectrometry using an immunoaffinity column. The chromatography method was validated for assay of aflatoxins using linearity, accuracy, precision and limit of detection and quantification. The linearity in the concentration ranged from 0.10 to $20{\mu}g/kg$ with $R^2$ > 0.9999. Sample recoveries ranged from 71.1 to 97.2% with relative standard deviations below 4.5% for spiking levels from 1 to $10{\mu}g/kg$. The limits of detection ranged between 0.02 and $0.05{\mu}g/kg$ and the limits of quantification ranged between 0.05 and $0.10{\mu}g/kg$. The levels of aflatoxin $B_1$, $B_2$, $G_1$ and $G_2$ in nuts, their products and dried fruits were $B_1$ 0.10 to $9.94{\mu}g/kg$, $B_2$ 0.08 to $1.54{\mu}g/kg$, $G_1$ 0.04 to $3.21{\mu}g/kg$ and $G_2$ 0.06 to $0.14{\mu}g/kg$.

• Korean Journal of Veterinary Service
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• v.36 no.4
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• pp.303-309
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• 2013

This study was conducted to determine the content of 7 mycotoxins (aflatoxin $B_1$, $B_2$, $G_1$, $G_2$, $M_1$, ochratoxin A and zearalenone) using LC-MS/MS in pork available on the Korean markets. The analysis was carried out using following conditions; C18 column ($2.1{\times}100mm$, $1.7{\mu}m$), mobile phase composed of $H_2O$ (0.1 mM $NH_4Ac$ 0.01% HCOOH) : Methanol (0.1 mM $NH_4Ac$ 0.01% HCOOH), binary pump at a flow rate of 0.5 mL/min and $2{\mu}L$ of injection volume, MS/MS detector with ESI positive and negative mode. The quantication of mycotoxins was based on matrix-matched calibration curves with a correlation coefficient in excess of 0.99 for the 7 mycotoxins. The dectection limits were ranged 0.74~2.13 ng/g, with mean recoveries between 73.10~97.46% except aflatoxin $B_1$ (61.31%). We also monitored mycotoxin residues in 208 pork samples. The test results, mycotoxins were not found except one sample. Ochratoxin A in one sample of the test samples was detected below the quantification limit.

• Informatization Policy
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• v.22 no.4
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• pp.68-90
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• 2015

This study aims, to review and analyze the trend of the paradigm shift of government innovation focused on the relation between government and citizens. This paper tries to analyze the effects and performance of government innovation through the government 3.0 model, which is highlighted in Korea. This paper chooses higher-education loan programs as the case to study and analyzes results using government innovation theories. Especially, this paper re-organizes Korea's higher-education loan programs with 'Government 3.0 model'. We can expect 'Government 3.0 model'is usefull when explaining the specific policy program innovation loan. Lastly, this paper looks, at improvement points in Korea's higher-education loan programs.