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( Jae Won Byun ),( Kyung Hyun Lee ),( Ha Young Kim ),( Soon Seek Yoon ),( Ji Youl Jung1 ),( Woo Seog Jeong1 ),( Jae Ku Oem ),( Jong Soo Lim ),( Myoung Heon Lee ),( You Chan Bae ) 한국예방수의학회(구 한국수의공중보건학회) 2013 예방수의학회지 Vol.37 No.1
Nine cattle among 18 in a native Korean herd died or were euthanized within 3 days. The affected cattle showed cowshed. The pigs and dogs had been fed leftover food originating from nearby restaurants, and the cattle could presumably reach the contaminated food in the pig troughs. Necropsy revealed a few chicken bones and red pepper pieces as well as large amounts of grain and rice straw hay mixed in the rumen. Botulism type D was isolated in the ruminal contents of one of the cattle. We speculated that the outbreak was associated with the cattle incidentally eating presumably contaminated leftover food from the pig trough.
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정선락 ( Sun Rak Jeong ),김영희 ( Young Hee Kim ),장지언 ( Ji Eon Jang ),이원기 ( Won Kee Lee ) 대한예방치과·구강보건학회 2015 大韓口腔保健學會誌 Vol.39 No.4
Objectives: The objectives of this study were to evaluate the effect of smoking on utilization of and expenses in ambulatory dental care. Methods: The subjects of this study were 5,751 men aged over 20 years selected from the Korea Health Panel data collected during 2010-2012. Pack-years of smoking were calculated based on the survey data. Dental utilization was defined as dental outpatient clinic use least once in three years. The expenses in ambulatory dental care were summed to determine total dental health care spending for three years. To detect the effect of smoking, we used multiple logistic regression analysis for dental utilization and multiple linear regression for expenses in ambulatory dental care after changing log. Results: The pack-years had a significant effect on dental utilization and expenses in participants aged 40-59 years. After controlling for income level, bedtime brushing, and the presence of chronic disease, dental care utilization rates in the over 10 to less than 25 pack-year and the over 25 pack-year groups were about 1.4 (OR=1.37, (P =0.007)) and 1.6 times (OR=1.59, (P =0.001)) those in the 0 pack-year group. In comparison with the 0 pack-year group, the over 10 to less than 25 pack-year group spent 50,000 won more over dental expenses, while the corresponding number for the over 25 pack-year group was about 100,000 won. Thus, the ambulatory dental care expenses increased with the packyears of smoking. Conclusions: Smoking significantly influenced the utilization and expense in ambulatory dental care in men aged 40-59 years.
( Ji Hyun Jeon ),( So Yun Park ),( Ju Hyun Youn ),( Sa Ra Lee ),( Kyung Ah Jeong ),( Hye Won Chung ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-
목적: The aim of this study was to evaluate preoperative anti-mullerian hormone levels in women with endometriomas or other benign ovarian cysts and differences between various characteristics of endometriomas. 방법: 116 patients aged 20 to 49 who underwent surgery for benign ovarian cyst were enrolled retrospectively. 73 patients were histopathologically confirmed as endometriomas, and 43 were other benign cysts. 73 patients with endometrioma were divided into 4 groups by characteristics of endometrioma, as single unilateral (group 1), single bilateral (group 2), multiple unilateral (group 3), and multiple bilateral (group 4). Serum AMH, maximum and total diameter of ovarian cysts were measured. AMH levels were compared according to pathology (endometrioma vs other benign cyst), size of ovarian cyst, age-matched AMH quartile percentile and characteristics of endometrioma. 결과: Although maximum and total diameter of ovarian cysts were smaller in endometrioma group than other benign cyst group (51.57±18.64 mm vs. 65.85±23.52mm, p=0.001; 87.31±48.99 mm vs. 89.55±41.73mm, p=0.016), preoperative AMH levels were significantly lower in endometrioma group than other benign cyst group (3.91±2.47ng/mL vs. 4.93±2.80ng/mL, p=0.045), but this difference was not statistically significant after adjustment of age. Dividing to age-matched AMH quartile percentile, patients with AMH level over 75 percentile were significantly decreased in endometrioma group (30.1% vs. 48.8%, p=0.018). Among four subgroups of endometrioma, AMH level was lowest in group 4 with multiple bilateral endometriomas (3.77±2.03ng/ml). Total diameter of endometriomas was greatest in this group 4 (118.46±61.85mm). 결론: Preoperative AMH might be decreased in women with endometrioma than other benign ovarian cyst, especially in multiple bilateral endometrioma group. Surgeons should concern ovarian reserve in reproductive aged patients with endometrioma.
( Ji Won Hong ),( Jieun Jeong ),( Sung Hong Kim ),( Sung Hwan Kim ),( Ho Sung Yoon ) 한국미생물 · 생명공학회 2013 Journal of microbiology and biotechnology Vol.23 No.3
A freshwater microalga, Chlamydomonas reinhardtii KNUA021, was characterized for its potential as a biochemical feedstock. Its optimal growth was observed when the culture was incubated at 25oC and pH 9.4. However, the isolate was capable of survival and growth under a variety of temperatures (10-30oC) and pH (pH 4.0-12.0) conditions. The total lipid content of the isolate was 21.7% of dry weight and it was found that a high-value fatty alcohol, hexadecenol (C20H40O), was autotrophically produced by strain KNUA021. In addition, a nutritionally important C18:3 ω3 (α-linolenic acid, ALA) was also identified in this photosynthetic microorganism as one of the major fatty acids. Hence, C. reinhardtii KNUA021 appears to show promise for use in the production of microalgae-based biochemicals.
( Ji Won Lim ),( Su Jeong Ryu ),( Min Cheol Shin ) 대한안과학회 2010 Korean Journal of Ophthalmology Vol.24 No.3
Purpose: To evaluate the effect of intravitreal bevacizumab injection (IVBI) in acute central serous chorioretinopathy (CSC) patients. Methods: Patients with acute CSC received IVBI (1.25 mg/0.05 mL) or observation by randomization. Twelve eyes in each group completed 6 months of regular follow-up and were ultimately included in this study. Each patient was assessed using best corrected visual acuity measurements, fluorescein angiography, and optical coherence tomography at baseline and had regular follow-ups after treatment. Results: All patients showed improvements in visual acuity and fluorescein angiographic leakage and had resolution of their neurosensory detachment following treatment. There were no significant differences in visual acuity, central retinal thickness, or remission duration between the IVBI group and the control group at baseline or after treatment (p>0.05). Conclusions: Intravitreal bevacizumab showed no positive effect in acute CSC patients compared to the observation group, and there were no adverse effects of treatment. Further investigation will be helpful to understand this therapy in patients with CSC.
Anti-angiogenic Effect of Itraconazole in Epithelial Ovarian Cancer
( Ji Yoon Ryu ),( Jung Joo Choi ),( Yoo Young Lee ),( Chel Hun Choi ),( Tae Joong Kim ),( Jeong Won Lee ),( Byoung Gie Kim ),( Duk Soo Bae ) 대한산부인과학회 2014 대한산부인과학회 학술대회 Vol.100 No.-
목적: A recent screen for selective inhibitors of endothelial cell proliferation identified the oral antifungal drug itraconazole as a novel agent with potential anti-angiogenic activity. Itraconazole significantly inhibited the binding of vascular endothelial growth factor (VEGF) to VEGF receptor 2 (VEGFR2), which is dependent on tumor-associated angiogenesis. The purpose of this study is to test the effects of itraconazole on tumor development and growth in epithelial ovarian cancer. 방법: We treated itraconazole in ovarian cancer cells (HeyA8, SKOV3ip1, HeyA8-MDR, & SKOV3-TR) or endothelial cells (HUVEC & SVEC4-10) to evaluate the effect on cell proliferation. To check the VEGFR2, S6K1 and Glii1 level according to itraconazole treatment, we performed the Western blot and RT-PCR in endothelial cell lines. In addition, therapy experiments of itraconazole with or without paclitaxel were done using human ovarian cancer cell lines SKOV3ip1 and HeyA8 in nude mice. Tumor cells were injected i.p., and 7 days later, the mice (n = 10 per group) were randomly assigned to four treatment groups: PBS (control), oral itraconazole 20 mg/kg twice daily, paclitaxel 100 ug mix with PBS i.p. once a week or a combination of itraconazole and paclitaxel. 결과: Although itraconazole treatment had no effect on cell proliferation of ovarian cancer cells assessed by MTT assay, it significantly inhibited the proliferation of endothelial cells including HUVEC & SVEC4-10s in a dose dependent manner. Treatment with 800nM itraconazole significantly decreased the expression of VEGFR2 compared to the negative control DMSO. Moreover, we found that itraconazole inhibits mTOR pathway target marker such as ribosomal protein p70S6 kinase (S6K1). Expression of Gli1, one of the main target of the Hh signaling was also inhibited by itraconazole in HUVEC. In HeyA8 & SKOV3ip1 orthotopic mouse models, the mice treated with the combination of itraconazole and paclitaxel had significantly decreased tumor weight (p< 0.05) compared with control (PBS), paclitaxel alone, or itraconazole alone group, respectively. 결론: These results suggest that itraconazole selectively inhibits endothelial cells rather than cancer cell itself through multiple mechanism of VEGFR2 degradation, Hh and mTOR pathway. Administration of itraconazole could be considered as new anti-angiogenic agents in treatment of epithelial ovarian cancer.
Ji-young Na,Hyeong-won Jeong 한국엔터테인먼트산업학회 2021 한국엔터테인먼트산업학회 학술대회 논문집 Vol.2021 No.11
With the development of technology and prevention of infection by COVID-19, non-contact service is no longer an unfamiliar to people, but a field to be pursued and developed continuously. This study analyzed and investigated the factors of relation between digital literacy, non-contact service satisfaction, and intention of continuous use. The main research questions, hypotheses, and verification results are summarized as follows. It was found that it had a significant influence on online education, online shopping, at-home workouts. In particular, it had a greatly positive influence on online education (<.01). In addition, non-contact service satisfaction has a significant influence on intention of continuous use. The main purpose of this study is to examine the factors that could lead to improvement in continuous intention of use when non-contact service is utilized and contribute to the base expansion of non-contact service.
Jeong-Kyu Park,Young-Ho Kim,Young-Hyok Ji,Yong-Chae Jung,Chung-Yuen Won 전력전자학회 2011 ICPE(ISPE)논문집 Vol.2011 No.5
In this paper, a novel control scheme of an active clamped flyback inverter with synchronous rectifier for a photovoltaic AC module system is presented. The synchronous rectifier (SR) is used on the transformer secondary side to reduce a conduction loss and to improve efficiency. Compared with an rectifier diode, the higher voltage rating switch can be used as the SR. And Rd(on) of an anti-parallel diode of the switch is lower than Rd(on) of the rectifier diode. After comparing the switch losses and the anti-parallel diode losses of the SR, the switch is turned on when the switch losses are lower. By adjusting the proposed control method, the operating region of the SR according to the grid phase is determined. A flow chart and operating region of the SR according to an output power have been presented in detail. The effectiveness of the proposed control strategy is validated thorough PSIM simulation results.