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고형연료제품 사용시설에서 배출되는 미세먼지 입경분율 분석
유한조(Han-Jo You),정연훈(Yeon-Hoon Jung),김진길(Jin-guil Kim),신형순(Hyung-Soon Shin),임윤정(Yoon-Jung Lim),이상수(Sang-Soo Lee),손해준(Hae-Jun Son),임삼화(Sam-Hwa Lim),김종수(Jong-Su Kim) 한국환경보건학회 2020 한국환경보건학회지 Vol.46 No.6
Objectives: With the growth of national interest in fine particulate matter, many complaints about pollutants emitted from air pollution emitting facilities have arisen in recent years. In particular, it is thought that a large volume of particulate pollutants are discharged from workplaces that use Solid Refuse Fuel (SRF). Therefore, particulate contaminants generated from SRF were measured and analyzed in this study in terms of respective particle sizes. Methods: In this study, particulate matter in exhaust gas was measured by applying US EPA method 201a using a cyclone. This method measures Filterable Particulate Matter (FPM), and does not consider the Condensable Particulate Matter (CPM) that forms particles in the atmosphere after being discharged as a gas in the exhaust gas. Results: The mass concentration of Total Suspended Particles (TSP) in the four SRF-using facilities was 1.16 to 11.21 mg/Sm3, indicating a very large concentration deviation of about 10 times. When the fuel input method was the continuous injection type, particulate matter larger than 10 μm diameter showed the highest particle size fraction, followed by particulate matter smaller than 10 μm and larger than 2.5 μm, and particulate matter of 2.5 μm or less. Contrary to the continuous injection type, the batch injection type had the smallest particle size fraction of particulate matter larger than 10 μm. The overall particulate matter decreased as the operating load factor decreased from 100% to 60% at the batch input type D plant. In addition, as incomplete combustion significantly decreased, the particle size fraction also changed significantly. Both TSP and heavy metals (six items) satisfied the emissions standards. The measured value of the emission factor was 38-99% smaller than the existing emissions factor. Conclusions: In the batch injection facility, the particulate matter decreased as the operating load factor decreased, as did the particle size fraction of the particulate matter. These results will help the selection of effective methods such as reducing the operating load factor instead of adjusting the operating time during emergency reduction measures.
갑상선암의 내시경 갑상선 절제술에서 근전절제술 및 전절제술의 임상적 비교
유한모,김태원,배자성<SUP>1<,SUP>,조항주,김기환,안창혁,박우찬<SUP>2<,SUP>,이동호<SUP>3<,SUP>,김정수,Han Mo Yoo,M,D,Tae Won Kim,M,D,Ja Sung Bae,M,D,<SUP>1<,SUP>,Hang Joo Cho,M,D,Kee Hwan Kim,M,D,Chang Hyuk An,M,D,Woo Chan Park,M 대한갑상선-내분비외과학회 2009 The Koreran journal of Endocrine Surgery Vol.9 No.4
Purpose: The aim of this study was to evaluate and compare the surgical outcomes of endoscopic total and near-total thyroidectomies in patients with thyroid cancer. Methods: Between February 2000 and January 2009, among 387 patients who underwent endoscopic thyroidectomy in our hospital, we evaluated 50 patients who underwent endoscopic total or near-total thyroidectomy. Thirty- five and 15 patients underwent endoscopic total thyroidectomy and near-total thyroidectomy, respectively. We analyzed the patients' clinicopathologic characteristics and post-operative complications between the two groups. Results: The mean size of tumors was 1.08 cm (range, 0.1∼3.5 cm) and the mean operative time was 192 minutes. Forty-nine tumors were papillary cancers and 1 tumor was a follicular cancer. Two patients in the endoscopic total thyroidectomy group underwent re-operation because of bleeding. In the near-total thyroidectomy group, one patient had transient hypocalcemia and one patient had temporary recurrent laryngeal nerve palsy. In the total thyroidectomy group, nine patients had transient hypocalcemia and one patient had temporary recurrent laryngeal nerve palsy. There was no statistical difference in the post-operative complicationrates between the two groups (P=0.254 for hypocalcemia and P=0.470 for injury to the recurrent laryngeal nerve). Conclusion: Based on our experience, endoscopic total thyroidectomy is a safe and feasible alternative to endoscopic near-total thyroidectomy. (Korean J Endocrine Surg 2009; 9:201-205)
Precursor 처리에 의한 산삼배양근의 ginsenoside 함량 조성변화 연구
이재국,유한석,이예지,김철중,심재권,조아름,이재근,오영선,한성현 한국약용작물학회 2018 한국약용작물학술대회 발표집 Vol.2018 No.05
Background : Korea's agriculture has been forced to change due to the decline in agricultural population, the aging of the population and the conclusion of the Convention on Biological Diversity. Thus, agriculture is seeking to develop into a sixth industry. For this reason, it is necessary to find high-function alternative plant resources for health promotion to meet the changes in national needs for agricultural products. The adventitious roots culture of wild mountain ginseng is the raw material of food code that produced by the biotechnology technique. introduced in the culture of the plant, which is the only way to use a raw material of food. Therefore, in order to increase the yield of ginsenoside in adventitious roots culture of wild mountain ginseng, ginsenoside precursor was treated and ginsenoside contents were analyzed. Methods and Results : In order to investigate effect of precursor treatment on the production of ginsenoside in adventitious roots culture of wild mountain ginseng, 5 g of adventitious roots culture of mountain ginseng were cultured in liquid SH media supplemented with 2 ㎎/l IBA, 3% sucrose for 8 weeks, which was co-cultured with β-sitosterol and Squalene (0.0625 to 1 mM) or without. Determination of 17 ginsenosides contents of each extract was carried out by HPLC. Rb3 was accumulated by only β-sitosterol, also it increased production of total ginsenoside in the cultured ginseng roots at a concentration of 0.125 mM, which was 2.47-fold higher than that in the control (78.13 ㎎/g of extract). Conclusion : These results are an important to improve the production yield of ginsenoside in adventitious roots culture of wild mountain ginseng, and they provide an opportunity for development of adventitious roots culture of wild mountain ginseng in dietary health supplement and pharmaceutical industries.
박홍태,박현의,조용일,김의형,정명환,신승원,이수형,김대용,유한상 대한수의학회 2017 Journal of Veterinary Science Vol.18 No.-
Paratuberculosis (PTB) is caused by Mycobacterium avium subsp. paratuberculosis (MAP) and is one of the most widespread and economically important diseases in cattle. After birth, calves are raised with natural breast feeding without separation from their mothers in most Korean native cattle (Hanwoo breed) farms. Vertical transmission of PTB has been reported, but the exact PTB infection route has not been revealed in Hanwoo farms. Calves of MAP seropositive dams were tested for MAP presence and MAP antibodies in feces and tissues. MAP was detected in calf tissues by using polymerase chain reaction. Expressions of genes reported to be prognostic biomarkers of MAP infection changed in both calves and cows (p < 0.05). Expression of two genes (HGF and SERPINE1) were significantly decreased in MAP-infected cattle and their offspring (p < 0.01). The results suggest that biomarker gene expression profiles can be useful in detecting early stage MAP infection. Based on the results, complete eradication of MAP may be possible if accurate diagnostic methods to detect infected calves are added to the current PTB eradication strategy, which, because infected individuals are likely to develop into fecal MAP shedders at any time, includes isolation of new born calves and feeding sterilized colostrum.
Mycobacterium avium subsp. paratuberculosis 감염 초기 개체 검출을 위한 항원 탐색 및 특성 분석
박홍태,박현의,신민경,조용일,유한상,Park, Hong-Tae,Park, Hyun-Eui,Shin, Min-Kyoung,Cho, Yong-Il,Yoo, Han Sang 대한수의학회 2015 大韓獸醫學會誌 Vol.55 No.2
Johne's disease, caused by Mycobacterium avium subsp. paratuberculosis (MAP), is one of the most widespread and economically important diseases in cattle. Current diagnostic methods are based on the detection of anti-MAP antibodies in serum or isolation of the causative agent. However, these techniques are often not applicable for cases of subclinical infection due to relatively low sensitivity. Therefore, finding new antigen candidates that strongly react with the host immune system had been attempted. To effectively detect infection during the subclinical stage, several antigen candidates were selected based on previous researches. Characteristics of the selected antigen candidates were analyzed using bioinformatics-based prediction tools. A total of nine antigens were selected (MAP0862, MAP3817c, MAP2077c, MAP0860c, MAP3954, MAP3155c, MAP1204, MAP1087, and MAP2963c) that have MAP-specific and/or high immune responses to infected animals. Using a transmembrane prediction tool, five of the nine antigen candidates were predicted to be membrane protein (MAP3817c, MAP3954, MAP3155c, MAP1087, and MAP1204). Some of the predicted protein structures identified using the I-TASSER server shared similarities with known proteins found in the Protein Data Bank database (MAP0862, MAP1204, and MAP2077c). In future studies, the characteristics and diagnostic efficiency of the selected antigen candidates will be evaluated.