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Yun, Young Soo,Pyo, Hye-Ri,Lee, Jae Yun,Chin, In-Joo,Jin, Hyoung-Joon American Scientific Publishers 2013 Journal of Nanoscience and Nanotechnology Vol.13 No.10
<P>Polypropylene (PP)/carbon black (CB)-alkylated graphene oxide (AGO) hybrid nanocomposites were prepared via solution process and the synergistic effects of AGO on the properties of the PP/CB nanocomposites were investigated. AGO at a content of only 0.2 wt% formed an overlapped network structure in the PP matrix and affected the electrical, thermal and mechanical properties of the PP/CB nanocomposites. Specifically, PP/CB (5 wt%)-AGO (0.2 wt%) nanocomposites exhibited an electrical percolation threshold at lower CB contents than the PP/CB nanocomposites did, and the sheet resistance was decreased to 2.3 x 10(7) omega/sq. The thermal degradation temperature and recrystallization temperature of the PP/CB (10 wt%) nanocomposites were increased by 11.3 and 1.6 degrees C, respectively, by the addition of 0.2 wt% AGO. In addition, the Young's modulus of the PP/CB (10 wt%) nanocomposite was increased from 438.1 to 540.1 MPa.</P>
최종윤,손화영,전무형,조성환,김혜성,류시윤,박배근,이영원,윤원기 충남대학교 수의과대학 동물의과학연구소 2001 動物醫科學硏究誌 Vol.9 No.-
Two farmed young ostrich chicks were applied to pathology laboratory at Chungnam National University. Grossly, one ostrich showed rotated tibiotarsus, the other showed rolled toes. Case 1 ostrich was hypertrophy of fibualis longus and tibial cranialis tendon and gastrocnemius tendon in crus, inflammation of flexor digitorum longus. In histopathological views, myocytes of fiburalis longus were showed hypertrophy and hyperplasia. It is not found any specific feature in X-ray of the case 2 ostrich. Limb deformities were detected frequently in farmed ostrich chicks in 2- to 3 weeks old. Limb deformities were an important cause of mortality in farmed ostrich chicks during the first 10weeks after hatch. Cause of limb deformities were considered a nutrition problem.
일부 운수사업장 근로자의 건강진단 유소견자의 사후관리 실행과 관련요인
윤혜은,박종,이영선,강성득,김철호 조선대학교 2003 The Medical Journal of Chosun University Vol.28 No.1
Objective : The purpose of this study was to find the relationship between the follow-up management status for medical problem to be treated and various characteristics of some workers at transportation business. Methods : A questionnaire survey was made toward 183 workers with medical problem(C and D2) among 945 examine in 1997. Results: Sixty four point five percent of surveyee received the examination result report and 40.5% were explained about the result 80.3% of surveyee answered that they knew the result of health examination. Most workers felt the necessity of the health examination, but 54.1% were dissatisfied with present health examination system and 66.7% pointed it out as nominal The rate of follow-up management for the medical problem was 62.8% By the multiple logistic regression the follow-up management rate for those who knew the health examination result were 2.98 times higher than those who didn't know the result (OR=2.98, 95% CI 1.41~6.29) The rate for those who perceived the medical problem already were 2.64 times higher than those who perceived the problem for the first time (OR=2.64, 95% CI 1.13~6.15). The rate for those who had subjective symptoms were 2.83 times higher than those who didn't have subjective symptoms. Conclusion : sixty two point eight percent of workers with medical problem performed the follow-up management and perception of health examination result, perception of the problem in the past and experience of subjective symptoms were related with the follow-up management.
土壤中에 있는 phenol分解細菌의 分離·同定 및 phenol分解能에 關한 考察
尹惠禎,金惠泳 梨花女子大學校 韓國生活科學硏究院 1986 韓國生活科學硏究院 論叢 Vol.38 No.-
Phenol은 有毒性이고 分解되기 어려운 環境汚染物質이며 大部分 芳香族化合物의 中間代謝産物이다. 또한 各種 産業工程에서 高濃度로 排出되기 때문에 그 毒性으로 인해 處理時 問題를 일으키므로, phenol 廢水處理를 위하여, phenol을 sole carbon source로 利用하는 菌株를 土壤으로부터 分離하여, 그 形態學的·生化學的 特性에 의해 同定하였으며, 各 分離菌株의 溫度別 phenol分解能을 比較하여, 優秀菌株에 대하여 phenol濃度別 分解試驗을 實施하였고, 活性汚泥法으로 phenol廢水를 處理하여 다음과 같은 結果를 얻었다. 1. 18個 地域의 土壤試料中 4個 地域의 土壤으로부터 6株의 phenol分解細菌이 分離되었으며 모두 Pseudomonas屬이었다. 2. 初期 phenol濃度를 500mg/ℓ로 하여 溫度別 分解試驗을 한 結果, Strain Ⅰ,Ⅱ,Ⅲ는 30˚C에서 Strain Ⅳ, Ⅵ는 25˚C에서, Strain Ⅴ는 37˚C에서 各各 最高分解率을 나타내었다. 그 中 分解能이 가장 秀麗한 菌株는 Strain Ⅲ로, 20∼37˚C에서 높은 分解率을 나타내었으며, 특히 30˚C에서는 36時間後 99%가 分解되었다. 3. Strain Ⅲ에 의한 phenol濃度別 分解試驗結果, 10,50,100,200,500mg/ℓ의 境遇는 各各 3,6,12,24,36時間에 99%가 分解되었다. 1,000mg/ℓ以上에서는 顯著한 lag phase가 있었으나, 1,000mg/ℓ의 境遇 66時間後 99%가, 2,000mg/ℓ의 境遇 108時間後 98%가 分解되었다. 그러므로, Strain Ⅲ는 비록 分解에 長時間을 要하나 2,000mg/ℓ의phenol도 sole carbon source로 分解可能한 高活性菌株였다. 4. 順應活性汚泥를 利用하여, 100~800mg/ℓ의 phenol廢水를 處理한 結果, 滯留時間을 平均 28時間으로 하여 好條件에서 平均 99.9% 處理되었다. Bacteria that can degrade the toxic and persistent pollutant, phenol, were isolated from soil and identified. Their phenol-degradabilities at various temperatures were compared, superior strain was selected and its phenol-degrading activity was tested at various concentrations of phenol. Phenol-wastewater was treated with acclimated and activated sludge. The results are as follows: 1. Six phenol-degrading bacteria were isolated from four of eighteen soil samples and all of them were identified as genus Pseudomonas by morpho-logical and biochemical characteristics. 2. Optimum temperature of Strain Ⅰ, Strain Ⅱ, and Strain Ⅲ was 30˚C, Strain Ⅳ and Strain Ⅵ was 25˚C and Strain Ⅴ was 37˚C. Of them, Strain Ⅲ had superior degradability at wide temperature range, 20~37˚C, especially, at 30˚C, Strain Ⅲ could degrade 99% of initial phenol 500mg/ℓ after 36 hours. 3. From the test of phenol-degrading activity of Strain Ⅲ at various concentrations of phenol, Strain Ⅲ was highly active strain capable of degrading phenol 2,000mg/ℓ as a sole carbon source, although it took a long time to do. 4. Phenol removal rate in the acclimated and activated sludge reactor fed phenol at 100~800mg/ℓ and operated with retention time of 28 hours in the optimum conditions was 99.9%.
수박 덩굴마름병 저항성 판별을 위한 SNP 표지인자 탐색
이혜은,홍종필,서혜영,허윤찬,안율균,김진희,김도선 忠北大學校 農業科學硏究所 2015 農業科學硏究 Vol.31 No.2
:Watermelon (Citrullus lanatus) is an important vegetable crop in the world and contains various health promoting compounds including many antioxidants such as lycopene and beta-carotene. Genetic diversity of cultivated watermelon is very narrow, which is one of major factors limiting the improvement of watermelon breeding program. Gummy stem blight (Didymella bryoniae (Auersw.)) is one of the most destructive diseases and causes crown blight, defoliation and fruit rot, resulting in severe production loss in watermelon. Single nucleotide polymorphisms (SNPs), important molecular markers for genetic studies are frequent sequence variation in the plant genome. This study was performed to develop SNP markers related to gummy stem blight resistance from three watermelon lines, one susceptible and two resistant to gummy stem blight. Of them, 22 SNP primers which were sequence information on SNPs derived from comparing a resistant and susceptible line was used for high resolution melt analysis. A total of 14 candidate SNP primers were detected melt temperature difference. These SNP primers can be useful for developing disease resistance-related markers and, therefore, beneficial to watermelon breeding program.
윤혜원,심기남,나선경,송도경,정정화,정가영 이화여자대학교 의과학연구소 2012 EMJ (Ewha medical journal) Vol.35 No.2
Double primary cancers are two independently developed cancers in an individual. There have been some reports on double primary cancer since Billroth reported it for the first time in 1879. Double primary cancer of the stomach and esophagus has been revealed a very low incidence worldwide. The incidence of an esophageal cancer with another primary cancer is reported to be 9.5∼27%, but double primary cancers in the esophagus and stomach have been rarely reported to our knowledge. In this study, we present here a case of double primary esophageal and stomach cancer in a 66-year-old man because of progressive dysphagia.