유기고분자로 표면 개질 된 입상활성탄을 이용한 프러시안 블루 고정화 및 Cs⁺ 제거

서영교,오대민,황유훈,Seo, Younggyo,Oh, Daemin,Hwang, Yuhoon 대한상하수도학회 2018 상하수도학회지 Vol.32 No.5

Prussian blue is known as a superior material for selective adsorption of radioactive cesium ions; however, the separation of Prussian blue from aqueous suspension, due to particle size of around several tens of nanometers, is a hurdle that must be overcome. Therefore, this study aims to develop granule type adsorbent material containing Prussian blue in order to selectively adsorb and remove radioactive cesium in water. The surface of granular activated carbon was grafted using a covalent organic polymer (COP-19) in order to enhance Prussian blue immobilization. To maximize the degree of immobilization and minimize subsequent detachment of Prussian blue, several immobilization pathways were evaluated. As a result, the highest cesium adsorption performance was achieved when Prussian blue was synthesized in-situ without solid-liquid separation step during synthesis. The sample obtained under optimal conditions was further analyzed by scanning electron microscope-energy dispersive spectrometry, and it was confirmed that Prussian blue, which is about 9.7% of the total weight, was fixed on the surface of the activated carbon; this level of fixing represented a two-fold improvement compared to before COP-19 modification. In addition, an elution test was carried out to evaluate the stability of Prussian blue. Leaching of Prussian blue and cesium decreased by 1/2 and 1/3, respectively, compared to those levels before modification, showing increased stability due to COP-19 grafting. The Prussian blue based adsorbent material developed in this study is expected to be useful as a decontamination material to mitigate the release of radioactive materials.

당뇨유도 백서 경골에 티타늄 임플란트 매식 시 저출력 초음파 적용이 골치유에 미치는 영향

서영교,김욱규,박상준,이수운,김용덕,황대석,Seo, Young-Kyo,Kim, Uk-Kyu,Park, Sang-Jun,Lee, Soo-Woon,Kim, Yong-Deok,Hwang, Dae-Seok 대한악안면성형재건외과학회 2012 Maxillofacial Plastic Reconstructive Surgery Vol.34 No.3

Purpose: Diabetes mellitus (DM) has been shown to alter the properties of the bone and impair bone healing around a titanium implant. The aim of this study is to investigate whether the low-intensity pulsed ultrasound (LIPUS), which has been known to stimulate the bone healing, improve the osseointegration of the titanium implant in tibia of DM-induced rats. Methods: 16 rats were received streptozotocin (60 mg/kg) for inducing diabetes. A total number of 32 titanium implants were placed bilaterally into both tibiae of these rats. The right tibia of each rat received LIPUS application (10 min/day) during 7 days post-operation, while the left side received no treatment. The study was carried on for six weeks and the rats were sacrificed at 1, 2, 4, and 6 weaks postoperatively (4 rats for each week) for histomorphometric and histologic analysis. Bone-implant contact and bone area were measured. Comparisons between the groups were made using statistical analysis on histomorphometric analysis. Results: The histomorphometry parameters showed that the bone-implant contact and the bone area values have decreased in the late osseointegration periods (4, 6 weeks) compared to the early osseointegration periods (1, 2 weeks) in both two groups. The bone-implant contact values of the LIPUS group were somewhat higher than those of controls at 1, 2 weeks, but the difference was not statistically significant. The bone area values of the LIPUS group were also higher than those of controls at 1, 2 weeks, but the difference was not statistically significant as well. Conclusion: Results of this study indicate that LIPUS may have positive effects on early osseointegration but could not improve the long term stability of dental implants.

해저지반과 해저케이블 매설

서영교,이광열,하광수,김태형,Seo, Yeong-Gyo,Lee, Gwang-Yeol,Ha, Gwang-Su,Kim, Tae-Hyeong 한국지반공학회 2012 지반 : 한국지반공학회지 Vol.28 No.3

백서 도상 피부피판에서 허혈-재관류 손상의 예방: Histamine 수용체 봉쇄약물과 L-arginine의 효과 비교

서영교,김욱규,Seo, Young-Kyo,Kim, Uk-Kyu 대한악안면성형재건외과학회 2006 Maxillofacial Plastic Reconstructive Surgery Vol.28 No.4

Vascular thrombosis and ischemic necrosis still remain the most significant threats to the survival of free flaps. To date, neutrophils have been implicated in the pathogenesis of postischemic injury. Several studies have demonstrated that modulating the neutrophil response to ischemia-reperfusion injury can decrease the extent of the injury. In addition, some authors noticed that mast cell counts were also increased in flaps exposed to state of ischemia/reperfusion. So, we designed to evaluate the role of mast cells in ischemia/reperfusion by blocking histamine and to compare the effect of L-arginine, a nitric oxide precursor which is known to prevent neutrophil-mediated tissue injury. Epigastric island skin flaps were elevated in 30 rats and rendered ischemic. Thirty minutes prior to reperfusion, the rats were treated with intraperitoneal saline, diphenhydramine, cimetidine, and L-arginine. The necrosis rate of flap at 7 days, the number of neutrophils and mast cells at 20 hours were evaluated. In conclusion, histamine receptor blockers as well as L-arginine significantly decreased flap necrosis in a rat skin island ischemia-reperfusion flap model, but the protective effect was not significantly different in both agent groups.

6년근 인삼재배 시 품종별 광폭해가림시설 적응성

서영교,장광진,Seo, Young Gyo,Chang, Kwang Jin 국립한국농수산대학교 교육개발센터 2005 현장농업연구지 = Journal of practical agricultural resear Vol.7 No.1

복식호흡 운동이 초등학생의 요통에 미치는 영향

서영교,정민수,이진환,민동기,이재홍,Seo, Young-Gyo,Jung, Min-Su,Lee, Jin-Hwan,Min, Dong-Gi,Lee, Jae-Hong 대한고유수용성신경근촉진법학회 2012 PNF and Movement Vol.10 No.3

Purpose : This study aims to analyze the effect of abdominal respiration on back pain of an Elementary Schoolchild. Methods : The data was collected from April 9 to April 27. We analyzed the descriptive statistics and paired t-test by SPSS 12.0 for windows. Results : The results of the study were as follow : The comparison of change in visual analogue scale showed effective differences before and after diaphragmatic breathing exercise. Conclusion : Thus, this study indicates that have a positive effect on Back Pain of an Elementary Schoolchild. Further trials, which give attention to these parts, are needed before any firm conclusions may be made.

대기 중 다환방향족탄화수소 측정방법의 성능평가 - 하이볼륨 샘플링 및 GC/MS 분석방법을 대상으로

서영교,박대권,백성옥,Seo, Young-Kyo,Park, Dae-Kwon,Baek, Sung-Ok 한국환경보건학회 2009 한국환경보건학회지 Vol.35 No.4

In this study, a measurement method was evaluated for the determination of polycyclic aromatic hydrocarbons (PAHs) in the ambient atmosphere. PAHs were sampled by high-volume samplers, and were then analysed with a GC/MS system. Particulate PAHs were collected on $8"{\times}10"$ quartz fiber filter, while vapor phase PAHs were adsorbed on polyurethane foam (PUF). Target compounds included a total of 36 PAHs, which are known to be frequently detected in the urban atmosphere. It was not necessary to clean-up samples before samples were analyzed using GC/MS, and the overall performance of the method was tested by a variety of quality control and quality assurance schemes. It is generally known that the clean-up procedure can negatively affect the recovery of samples. Precision and accuracy was evaluated using SRM provided by US NIST, and the results were generally satisfactory and reliable. However, the GC/MS method appeared not to be adequate for 6-rings PAHs, such as coronene, due to its lower sensitivity. In addition, collection efficiencies for low molecular compounds, such as 2-rings PAHs, were poor because of the lower retention volume of the PUF adsorbent. As a result, it was concluded that the method based on high-volume sampling and GC/MS analysis can give very reliable data by simultaneous sampling of both particulate and vapor phases for 3-rings to 5-rings PAHs of environmental concern.

테이핑이 내측 상과염 환자의 통증에 미치는 효과

서영교,김기철,이재홍,최정희,김신균,이수진,Seo, Young-Gyo,Kim, Ki-Chul,Lee, Jae-Hong,Choi, Jeong-Hee,Kim, Shin-Gyun,Lee, Su-Jin 대한고유수용성신경근촉진법학회 2012 PNF and Movement Vol.10 No.4

Purpose : The Purpose of this study was to investigate the effects of taping on the pain decrease in patient with medial epicondylitis. Methods : A total of 20 patients participated in this study. Group 1 of 10 subjects performed taping intervention three times a week. Group 2 of 10 subjects only therapeutic modalities for 30 minutes. We analyzed the descriptive statistics and one-way ANOVA by SPSS 12.0 for windows. Results : In comparison of VAS between pre and post value, the decrease of pain was significant in the experimental and control group(p<.05). In comparison of the difference of VAS score between the groups was significant difference at (p<.05). Conclusion : Taping techniques helped to lower VAS score in patients with medial epicondylitis. Further tirials, which give attention to these parts, are needed before any firm conclusions may be made.

新羅의 南海品 중개무역과 銅

서영교(youngkyo, Seo) 중원대학교 인문사회과학연구소 2012 사회과학저널 Vol.1 No.2

羅唐戰爭期 唐兵法의 導入과 그 意義

서영교(Seo Young-Kyo) 한국사연구회 2002 한국사연구 Vol.116 No.-

Unlike the earlier millitary classics, the textual history of Question and Replies has not benefited from any startling discoveries or recently recovered renditions. Consequently, although analytical studies have become more incisive, the fundamental question of authorship and the period of composition remain essentially unresolved. In the Ming and Ch'ing dynasties, orthodox scholars reviled the text as forgery Characterized by uncouth language, limited concepts, and erroneous interpretations of historical events. In the last century a few voices have begun to cautiously criticize these strident expression of personal opinion, but no one has yet ventured to attribute the book to Li Ching or assert that constitutes an actual record of conversations Briefly summarized, there are two main views: One holds that the book is a forgery of the Northern Sung, the other that it was compiled by unknown scholars late in the T'ang or early Sung. These views are based mainly on the absence of any reference to a book by this title in the bibliographical section in either History of the T'ang or History of the Northern Sung and on claims of Northern Sung military scholars to have seen a draft of the Yuan I, who purportedly forged it. The concurrence of several contemporaries regarding these claims prompted later generations of orthodox thinkers, who were already predisposed to view the text as an inferior work, to readily accept the forgery story as fact. Finally, the Tong-dian(通典). which was compiled by Tu yu(杜佑) at the end of eighth century A.D., contain numerous excerpts from a work entitled Li Ching ping-fa and quotes Li Ching extensively but without ever mentioning the Question and Replies. Evidence discrediting the Yuan I forgery theory is based on Emperor Shen-tsung's(神宗1067-1084) edict mandating the study and exegesis of "Li Ching's ping-fa" because the text had become unreadable in the Northern Sung. Thereafter, the emperor also ordered the compilation and editing of the ancient military work, resulting in the present Seven Military Classics. Latter's initial circulation is believed to have predated the forgery story by about ten years; therefore, the Question and Replies must have been in existence prior to its supposed creation by Yuan I. Furthermore, analysts question how the best military scholars--in a period when they are fervently investigating military theory for the urgent purpose defending the state--could all have been deceived. Accordingly, they conclude that the forgery story must be false. Generally speaking, military historians perceive advances over previous texts in theory and conceptualization in the Question and Replies and believe the book must come from the hands of an experienced strategist, even if it dose not record the actual discussion between Li Ching and T'ang T'ai-tsung. However, such concepts as "infantry dominating cavalry" -which are expressive of Sung thougth-inevitably consign it to the Northern Sung. Then, what shall we think about battle formation were recorded in Samguksagi(Records on the History of the Three Kingdoms) Vol. 7 which dose contain the name of Six Flowers formation associated with Li Ching ? I would think of it as an important clue to reflect the existence of Li Ching's Six Flowers formation with contemporary.