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기술노트 : 춘천시 일부 농촌 지역의 음용수 수질에 관한 조사연구
박수정 ( Su Jung Park ),김문경 ( Moon Kyung Kim ),기영선 ( Young Sun Ki ),오소린 ( So Rin Oh ),신미연 ( Mi Yeon Shin ),오지윤 ( Ji Yoon Oh ),변재철 ( Jae Cheol Byeon ),이성민 ( Seong Min Lee ),정은희 ( Eun Hee Jung ),김은미 ( Eun 한국물환경학회 2006 한국물환경학회지 Vol.22 No.3
This study was conducted in the summer of 2005 in Shindong-myeon, Chuncheon-si, Gangwon-do to assess the quality of drinking water and to evaluate their potential pollutants. Ninety four water samples were collected from three classes of water supplies such as simple piped water, supplied own water and others (Supplied local water). Most residents used simple piped water (72.63%). 31.25% residents thought the water quality was bad and landfill was the main source of pollution that affected water quality. To correspond this perception, water quality was measured according to Drinking Water Quality Standard. The general bacteria, coliforms, and NO3-N exceeded the standard but the water qualities in these four areas were suitable for Drinking Water Quality Standard. The simple piped water showed low mean concentration of excess rate compared to supplied own piped water except general bacteria. Hardness, pH, and NO3-N showed significantly higher effects on drinking water quality. To evaluate the effect of effluent from landfill, water quality was measured according to distance and altitude. However, there was no effect of landfill effluent. To find out the effect of rainfall, we compared water quality of the year 2003 with that of 2005. The result showed significant differences in hardness and NO3-N concentration. This study confirmed that NO3-N, coliforms, and general bacteria are main pollutant of water supply in rural community. Therefore, it is necessary to regularly maintain simple piped water supply, supplement sewer facilities, and educate residents about public health risk associated with drinking water in rural area.
Yoon Hyeong Byeon,Jung Eun Choi,Jeong Yeong Park,Jeong Hyun Song,Kyeong Jun Yeo,Eun Jung Kong,Su Hwan Kang,Soo Jung Lee 대한갑상선-내분비외과학회 2017 The Koreran journal of Endocrine Surgery Vol.17 No.3
Purpose: Ultrasonography and computed tomography of the neck are commonly used for preoperative evaluation of neck lymph node (LN) status in papillary thyroid carcinoma (PTC). This study evaluated the accuracy of preoperative positron emission tomography/magnetic resonance (PET/MR) imaging of cervical LN status in PTC. Methods: A retrospective chart review of 285 patients who received PET/MR and underwent open thyroidectomy due to primary PTC between August 2012 and October 2013 was performed. Visual 18F-fluorodeoxyglucose uptake and preoperative morphologic abnormalities of nodal shape, cortical thickness, and the fatty hilum of neck nodes were analyzed using PET/MR imaging. Results: Total thyroidectomy and lobectomy were conducted in 78.2% (223/285) and 21.8% (62/285) of cases, respectively. The status of central neck LN were evaluated in all patients during surgery and additional evaluation of lateral neck LN were conducted in 11.9% (34/285) of patients through selective sampling or modified radical neck dissection. In total, 36.1% (103/285) of patients had pathologic neck LN metastasis (LNM). PET/MR imaging showed an accuracy of 68.8%, sensitivity of 32.7%, and specificity of 88.6% for the detection of central neck LNM; moreover, an accuracy of 95.1%, sensitivity 68.4%, and specificity of 97.0% for lateral neck LNM. PET/MR imaging showed higher accuracy for detecting neck LNM in the 164 patients who did not have suspected clinical thyroiditis than others. Conclusion: PET/MR has a high specificity for detecting central LNM, especially for patients diagnosed with PTC without pathologic thyroiditis.
Effects of the CYP2D6*10 allele on the pharmacokinetics of atomoxetine and its metabolites
Byeon, Ji-Yeong,Kim, Young-Hoon,Na, Han-Sung,Jang, Jong-Hwa,Kim, Se-Hyung,Lee, Yun-Jeong,Bae, Jung-Woo,Kim, In Su,Jang, Choon-Gon,Chung, Myeon-Woo,Lee, Seok-Yong Springer-Verlag 2015 Archives of Pharmacal Research Vol.38 No.11
( Su Young Jung ),( Da-hye Yeom ),( Ree-keun Kong ),( Gab Gyun Shin ),( Kwang Soo Lee ),( Hee Seop Byeon ) 한국목재공학회 2020 목재공학 Vol.48 No.5
In this study, the effect of specimen size and layer thickness on the sound absorption of the leaves of two evergreen broad-leaved tree species, Dendropanax morbiferus and Fatsia japonica, was investigated. The specimen sizes of 0.5 × 0.5, 1.0 × 1.0, and 2.0 × 2.0 cm<sup>2</sup> and layer thicknesses of 1.00, 1.75, and 2.50 cm were considered. At the layer thickness of 2.5 cm, the leaf of the D. morbiferus showed no significant difference in sound absorption coefficients (SACs) as the sample size varied, however, a significant change in SACs was recorded in that of the F. japonica. At 1.0-cm thickness, the SACs of the F. japonica leaf varied more remarkably with the sample size. The 2.50-cm-thick F. japonica leaf with the specimen size 0.5 × 0.5 cm<sup>2</sup> exhibited the highest sound absorption effect among all samples investigated.
Effects of Air-Dried Leaves of Evergreen Broad-Leaved Trees on Sound Absorption Property
( Su-young Jung ),( Ree-keun Kong ),( Kwang-soo Lee ),( Hee-seop Byeon ) 한국목재공학회 2021 목재공학 Vol.49 No.5
This research was conducted to analyze the sound absorption effect of air-dried leaves from two evergreen tree species found in Korea's warm-temperate and subtropical regions. As eco-friendly sound absorption materials, Dendropanax morbiferusa, and Fatsia japonica leaves were prepared in three specimen units sizes 0 .5 × 0 .5㎠, 1 .0 × 1 .0㎠, and 2 .0 × 2 .0 ㎠, and each of them was formed at a thickness of 1.00 cm, 1.75 cm, and 2.50 cm. The measured sound absorption coefficients (SAC) for 18 conditions were comparatively analyzed in this study. The SAC of both tree species was significantly improved by increasing the dried leaf layer thickness. These results showed a more consistent and distinct trend for both tree species under the condition of 0.5 ㎠ in dried leaf size compared to other leaf specimen sizes. However, as the thickness increased, the difference in sound absorption effect according to the leaf size tends to decrease overall. In the case of D. morbiferus, there was no significant difference in SAC based on leaf size under the condition of 2.5 cm thickness (p < 0.05). The highest mean SAC was found in a 2.5 cm thick condition with a leaf size of 0.5 × 0.5㎠, 0.549 for D. morbiferusa, and 0.594 for F. japonica, respectively.
ITS 염기서열을 이용한 한국산 꿩의비름속 꿩의비름 및 근연식물의 유연관계분석
Hyun Su So,Won Seok Jung,Byoung Man Kang,Ri Na Byeon,Byeong Jun Jeon,Seong Ho Ham,Jung Hee Cho,Jun Hwan Yeo 한국약용작물학회 2016 한국약용작물학술대회 발표집 Vol.2016 No.10
Background : Korean Indigenous Hylotelephium erythrostictum is widely distributed in South Korea and is used in Korean traditional medicine. In this study, the phylogenetic analysis of Korean native Hylotelephium erythrostictum and related plants on Internal Transcribed Spacer (ITS) sequences were investigated to distinguish its origin. Methods and Results : The phylogenetic analysis of 6 species of Hylotelephium were investigated by ITS. The dendrogram was constructed by UPGMA(Unweighted Pair Group Method with Arithmetic Mean) clustering algorithm based on genetic similarity of ITS. In the ITS sequence analysis, the size of total was varied from 676 to 779 bp. The size of ITS 1 was rated at 287bp, while ITS 2 was rated at 123bp. The G+C content of ITS region was ranged from 60 to 66%. In the ITS tree, six species of Hylotelephium were monophyletic, and H. viviparum was the first branching within the clade. Conclusion : H. spectabile formed a clade with H. erythrostictum, while H. verticillatum formed with H. viviparum.