• Toxicological Research
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• 제31권3호
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• pp.221-226
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• 2015

With the diversification and internationalization of the food industry and the increased focus on health from a majority of consumers, food safety policies are being implemented based on scientific evidence. Risk analysis represents the most useful scientific approach for making food safety decisions. Total diet study (TDS) is often used as a risk assessment tool to evaluate exposure to hazardous elements. Many countries perform TDSs to screen for chemicals in foods and analyze exposure trends to hazardous elements. TDSs differ from traditional food monitoring in two major aspects: chemicals are analyzed in food in the form in which it will be consumed and it is cost-effective in analyzing composite samples after processing multiple ingredients together. In Korea, TDSs have been conducted to estimate dietary intakes of heavy metals, pesticides, mycotoxins, persistent organic pollutants, and processing contaminants. TDSs need to be carried out periodically to ensure food safety.

• 한국환경농학회:학술대회논문집
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• 한국환경농학회 2011년도 30주년 정기총회 및 국제심포지엄
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• pp.279-279
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• 2011

• 한국수산과학회지
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• 제51권1호
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• pp.8-14
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• 2018

We investigated the levels of microbial contaminants and microbial hazards during dried-laver processing. We analyzed 321 samples obtained from 18 dried-laver Pyropia spp. manufacturing facilities, including water, swab-, and processing samples as well as final products. The levels of microbial contaminants, including viable cell counts (VCC) and coliform bacteria, increased as processing progressed. The sanitary indicator bacterium, Escherichia coli, was not detected in the final products although VCC levels were high, generally exceeding 5 log CFU/g. We also investigated changes in microbial contaminants at each processing step. Both VCC and total coliform dramatically increased after 4 days of continuous processing, indicating that microbial contaminants originated, mainly, from cross contamination during processing.

• 한국식품과학회지
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• 제44권2호
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• pp.247-250
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• 2012

본 연구에서 적용한 시험법의 회수율은 97.4-122.5%, 상대표준편차(RSD)는 6%이내로서 적합한 시험법임을 확인하였다. 조사된 원유 및 시유의 검출농도는 아플라톡신 $M_1$이 평균 29.6 ng/kg(5.4-72.7 ng/kg)로 나타났으며, 원유 및 시유에 대한 아플라톡신 $M_1$ 오염수준은 현행 식품공전에서 정한 허용기준치인 500 ng/kg 보다 낮은 안전한 수준인 것으로 판단된다.

• 한국식품위생안전성학회지
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• 제28권2호
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• pp.99-107
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• 2013

식품오염물질에 관련한 연구가 많이 진행되었지만 대부분 단기적 과제이었기에 식품오염물질 관리를 위한 종합적이고 체계적인 연구가 필요하다. 본 연구에서는 식품오염물질 향후 연구방향을 제안하기 위하여 델파이 조사를 실시하였으며, 중요도 및 시급성을 고려하여 우선순위를 설정하였다. 학계, 연구기관, 정부기관, 기업 등 다양한 소속에 있는 50명의 전문가를 대상으로 식품안전과 관련한 개방형 질문을 하였으며, 161개의 필요연구항목을 도출하였다. 이를 분류하여 5개 분야, 42개 항목으로 구성된 설문지를 작성하였다. 5개 분야는 '식품오염물질 통합관리 시스템', '환경유래 식품오염물질 안전관리', '식품 중 오염된 자연독소 안전관리', '조리가공 중 생성된 식품유해물질 안전관리', '국내외 식품오염물질 안전관리 협력체계 구축 및 교육 홍보 방안' 이었다. 전문가들이 답한 설문지(30/50 응답)를 분석하여 필요연구의 우선순위를 설정하였으며, 전문가들의 합의단계를 거쳐(24/30 응답) 이를 확정하였다. 본 설문조사 결과는 식품오염물질 안전관리를 위한 연구방향을 설정하기 위한 기초자료로 사용할 수 있을 것이라 사료된다.

• Journal of Microbiology and Biotechnology
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• 제26권9호
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• pp.1505-1516
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• 2016

The detection of food pathogens is an important aspect of food safety. A range of detection systems and new analytical materials have been developed to achieve fast, sensitive, and accurate monitoring of target pathogens. In this review, we summarize the characteristics of selected nanomaterials and their applications in food, and place focus on the monitoring of biological and chemical contaminants in food. The unique optical and electrical properties of nanomaterials, such as gold nanoparticles, nanorods, quantum dots, carbon nanotubes, graphenes, nanopores, and polydiacetylene nanovesicles, are closely associated with their dimensions, which are comparable in scale to those of targeted biomolecules. Furthermore, their optical and electrical properties are highly dependent on local environments, which make them promising materials for sensor development. The specificity and selectivity of analytical nanomaterials for target contaminants can be achieved by combining them with various biological entities, such as antibodies, oligonucleotides, aptamers, membrane proteins, and biological ligands. Examples of nanomaterial-based analytical systems are presented together with their limitations and associated developmental issues.

• 한국환경보건학회지
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• 제43권4호
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• pp.307-313
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• 2017

Objectives: Chemicals derived from various environment media contaminates food across the food supply chain. In Korea, levels of contaminants in food have been sporadically measured by monitoring programs of different government agencies. There is difficulty with data compilation and integrated analysis across media. Therefore, the aim of this study was to propose an overall integrated database and analytical platform design for the 'ECO-FOOD NET (Environmental COntaminant reduction platform for FOOD through an interagency collaboration NETwork)', a tool to support the reduction of environmental contaminants in food. Methods: We developed a new data structure and standardized protocols for the compilation of integrated data. In addition, we conducted subject-oriented logical and physical relational database modeling and created the architecture design of the platform. Results: We established a standardized code system related to exposure media and route, analysis method and food matrix. In addition, we designed the seven software modules of 'About the System', 'Introduction to Interagency Work', 'Media-Chemicals Profiles', 'Method Bank', 'Monitoring Data Base', 'Integrated Media Analysis', and 'Risk-Benefit Analysis'. Conclusions: This study will contribute to decision-making as a tool for executing risk management, such as sustainable reduction policies of contaminants in food.

• Food Science and Biotechnology
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• 제27권6호
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• pp.1843-1856
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• 2018

Tea is one of the most frequently consumed drinks due to its favourite taste and the health benefit. Tea is produced by several processes and drying is very important step to develop the flavour and destroys the enzymes in tea. However, during drying tea, polycyclic aromatic hydrocarbons some of which are carcinogen and genotoxin are naturally produced. The risk of PAHs by drinking tea was characterized by determining contents of 4 PAHs in tea. 4 PAHs including Benz(a)anthracene (BaA), Chrysene (CHR), Benzo(b)fluoranthene (BbF) and Benzo(a)pyrene (BaP) were investigated by GC-MS in total 468 tea products, which were contaminated up to $4.63ng\;g^{-1}$. Mate tea was the most highly contaminated by BaA, CHR, BbF and BaP and followed by Solomon's seal and Chrysanthemum. The Margin of Exposures calculated by the concentration of BaA, CHR, BbF and BaP and consumption amount of tea were higher than 10,000, and the risk of PAHs in tea were low concern to public health.

• Toxicological Research
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• 제21권4호
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• pp.333-338
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• 2005

Many of thyroid hormones disrupting chemicals induce effects via interaction with thyroid hormone and retinoic acid receptors and responsive elements intrinsic in target cells. We studied thyroid hormones disrupting effects of food additives and contaminants including BHA, BHT, ethoxyquin, propionic acid, sorbic acid, benzoic acid, CPM, aflatoxin B1, cadmium chloride, genistein, TCDD, PCBs and TDBE in recombinant HeLa cells containing plasmid construct for thyroxin responsive elements. The limit of response of the recombinant cells to T3 and T4 was $1\times10^{-12}\;M$. BHA. genistein, cadmium and TBDE were interacted with thyroid receptors with dose-responsive pattern. In addition, BHA, BHT, ethoxyquin, propionic acid, benzoic acid, sorbic acid, and TBDE showed synergism while cadmium chloride antagonism for T3-induced activity. This study elucidates that recombinant HeLa cell is sensitive and high-throughput system for the detection of chemicals that induce thyroid hormonal disruption via thyroid hormone receptors and responsive elements. Also this study raised suspect of BHA. BHT, ethoxyquin, propionic acid, benzoic acid, sorbic acid, TBDE, genisteine and cadmium chloride as thyroid hormonal system disruptors.

• 한국식품과학회지
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• 제42권5호
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• pp.541-548
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• 2010

GC/PCI-MS/MS를 이용하여 식육가공품 등 총 154건을 대상으로 니트로사민의 함량을 조사하여 노출량을 평가하였다. 니트로사민의 회수율은 84-112%였고, 검출한계는 0.5 ${\mu}g$/kg 이하, 정량 한계는 1.5 ${\mu}g$/kg 이하의 수준이었다. 니트로사민은 전체 시료 154 건 중 89건이 검출되어 검출율이 58%를 보였으며 이중 전체식품 대비 식육가공품이 27%, 어육가공품이 19%, 젓갈 7%, 주류 및 음료 5%의 검출율을 보였다. 1일 평균 섭취량과 체중을 근거로 전체 인구집단의 니트로사민 인체노출량을 산출한 결과, 평균노출에서 $4.92{\times}10^{-7}$mg/kg b.w./day으로 나타났으며, 노출안전역 (MOE)은 208,939로 위해영향이 거의 없는 수준으로 나타났다.