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신기식 ( Ki Sik Shin ),박우상 ( Woo Sang Park ),이정서 ( Jung Seo Lee ),유순주 ( Soon Ju Yu ),박태진 ( Tae Jin Park ),김종민 ( Jong Min Kim ) 한국물환경학회 2015 한국물환경학회지 Vol.31 No.1
Acute toxicity test with Daphnia magna has a variety of factors such as incubation condition of test species, food quality and proficiency of laboratory workers. Therefore, proper proficiency testing samples were required for evaluating the competence of laboratory workers. This study aims to propose some appropriate proficiency testing samples for laboratory workers of acute toxicity test with Daphnia magna. Proposed four kinds of standard samples (Sample A, B, C, and D) for proficiency testing were selected from reference materials which were recommended from Canada and USA WET(Whole Effluent Toxicity) authorities. Proposed standard samples were tested by trial application of proficiency testing, homogeneity and stability checks using repeatability test. Sample A, C and D were estimated ad the suitable candidates for proficiency test standard samples except for Sample B. In addition, Sample A was proved to be the most suitable sample.
김종민 ( Jong Min Kim ),신기식 ( Ki Sik Shin ),유순주 ( Soon Ju Yu ),김명옥 ( Myeong Ock Kim ),최성헌 ( Sung Hun Choe ) 한국물환경학회 2014 한국물환경학회지 Vol.30 No.6
Proficiency testing by interlaboratory comparisons is used to determine the performance of individual laboratories. In order to verify the quality of acute toxicity testing with Daphnia magna, National Institute of Environmental Research in South Korea is regularly organizing interlaboratory comparisons to estimate the analytical accuracy of different laboratories . Total 58 laboratories located in South Korea took part in interlaboratory proficiency testing scheme with three proficiency testing samples. TU(Toxic Unit) values of each laboratory were determined and robust z-score was calculated in order to evaluate the proficiency levels. Based on the robust z-score classification, 74 % of the participant laboratories showed a satisfactory performance(43 laboratories). The main reason of ‘unsatisfactory’ performance seemed to be considered that the unsuitable management of test organism incubation system and the lack of experience on the identification of the test organism condition by effect of toxicity.
뱃멀미지수와 해군 함정 승조원의 멀미약 소비량과의 관계
김도연 ( Do Yeon Kim ),박기웅 ( Ki Woong Park ),양수경 ( Soo Kyung Yang ),신기식 ( Ki Sik Shin ),엄석현 ( Suk Hyun Eum ),한광남 ( Gwang Nam Han ),김명원 ( Myung Won Kim ) 국군의무사령부 2019 대한군진의학학술지 Vol.50 No.1
Objectives; Korea Hydrographic and Oceanographic Agency (KHOA) developed Korean motion sickness index which estimates the incidence of sea sickness and helps prevention of sea sickness for citizens and ship crew. Because avoidance of sea sickness is impossible for naval crew, prevention and supply of anti-sea medication is important in sailing. Method and material; This research was an ecologic study in two naval destroyers. The study included available sailing days which includes domestic sail records from April 2018 to October 2018. We collected daily Korean motion sickness index from KHOA and daily supply of anti-motion sickness medication. Motion sickness index was divided into 5 stages (Very good, good, usual, bad, very bad). We defined anti-motion sickness medication consumption rate (AMCR) as (total consumption of anti-motion sickness medication) / (total crew numbers) X 100. Motion sickness index and AMCR were compared with univariate analysis. Results; Among available 60 sailing days, motion sickness index of good was 15 days, usual was 31, and bad was 14 days. There was no very good or very bad days among sailing days. Average scores of components in motion sickness index were 3.32 for wave height, 4.42 for ship weight, 1.55 for sailing time, and 2.72 for maximum wind speed. Averagic AMCR were 2.44%. AMCR for good sailing day was 0.22%, usual was 1.36%, and bad was 6.99%. The medication consumption was increased in bad sailing day by 31 times. Conclusions; We found inverse correlation between motion sickness index and AMCR in this study. Before sailing, supply of motion sickness medication could be estimated through Korean motion sickness index.