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Kim,Jung-Keun 대한구강생물학회 2007 International Journal of Oral Biology Vol.32 No.4
This study was conducted to investigate the preventingeffects of OPB (Rehmannia glutinosa Libosch and Eleuth-erococcus senticosus Max extracts) and combined OPB/Calcium therapy on bone loss in ovariectomized rats. SixtySprague Dawley rats of 12-week-old were divided into eightgroups: OVX (ovariectomized), OPBL (OPB 50mg/kg),OPBM (OPB100mg/kg), OPBH (OPB 200mg/kg), OPBL/CAL(OPBL+CAL), OPBM/CAL (OPBM+CAL), OPBH/CAL (OPBH+CAL) and CAL (Calcium citrate 88.33mg/kg+1α, 25-dihydroxy-vitamin D3 33.33IU/kg). Bone mineraldensity (BMD), bone mineral content (BMC), bone strengthindices and cortical thickness were analyzed by peripheralquantitative computerized tomography (pQCT). pQCTscanning showed that OVX induced a significant decreasein trabecular bone mineral density and bone mineralcontent in the proximal tibia (-36.4±2.4%, -21.8±12.7%).These decreases were significantly prevented by theadministration of OPBM and OPBM/CAL. Cortical BMDand BMC of tibia were slightly enhanced by OPB and OPB/CAL. However there was no significant difference betweenOVX and OPB, OPB/CAL treated group. Bone strengthindices and cortical thickness were not significantly different.Our results suggest that OPB and combined OPB/Calciumtherapy are effective in preventing the development of boneloss induced by ovariectomy in rats.
Himaya, S.W.A.,Ryu, BoMi,Qian, Zhong-Ji,Li, Yong,Kim, Se-Kwon Elsevier 2011 european journal of pharmacology Vol.670 No.2
<P><B>Abstract</B></P><P>Unregulated activation of microglia is a key risk factor contributes to neurodegenerative diseases and suppression of this phenomenon is considered as a potential therapeutic target. The compound isolated from sea horse <I>Hippocampus kuda</I> Bleeler; 1-(5-bromo-2-hydroxy-4-methoxyphenyl)ethanone [SE1] was characterized for its ability in suppressing LPS mediated activation of murine BV-2 cells. Despite the presence of various active molecular groups in the structure, SE1 has not well explored for its biological activities. The outcome of this study clearly indicated that SE1 inhibited the production of inflammatory mediators; nitric oxide, prostaglandin E<SUB>2</SUB> and pro-inflammatory cytokines. Furthermore, it inhibited the protein and gene expression levels of inducible nitric oxide synthase, cyclooxygenase-2, tumor necrosis factor-α, interleukin-1β and interleukin-6. The responsible signaling mechanisms leading to these inhibitions were identified as SE1 mediated blocking of phosphorylation of mitogen activate protein kinase (MAPK) molecules; C-jun-N-terminal kinase (JNK), p38 and nuclear translocation of nuclear factor-κB (NF-κB) p65 and p50 subunits. These results suggest that SE1 has the potential to be further developed as therapeutic against neuro-inflammation.</P> <P><B>Graphical abstract</B></P><P><ce:figure id='f0045'></ce:figure></P>
김형락,권세웅,황광선,윤영중 延世大學校 電波通信共同硏究所 2002 電波通信論文誌 Vol.6 No.1
차세대 통신 시스템에서 공통적으로 요구하는 소형화, 광대역화, 집적화추세에 따라 RF소자는 광대역화, 소형화, 집적화를 향해 발전하고 있으며 안테나 기술도 현재 추세에 발맞추어 소형화, 능동집적화, 광대역화를 통하여 개발 방향을 모색하고 있다. 본고에서는 현재 추세인 소형 안테나, 능동 안테나와 더불어 최근 관심이 집중되고 있는 임펄스 통신에 이용될 수 있는 초광대역 안테나 기술에 대해 소개한다. The technical trends of the next generation wireless communication are miniaturization, broad-band operation, and integration. Thus, in accordance with this trend, RF devices and components are being developed in such way, and same with the antenna. In this paper, technology of small antenna, active antenna, and ultra wideband antenna, which can be applied to impulse communication system, are introduced.
김영훈,장재현,권세훈,장재혁,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.3
A 29 year old female patient came with grade NYHA Fc IV dyspnea of 1 month. No abnormality was heard during auscultation. Arterial blood gas analysis done due to shortness of breath showed a decreased PO_(2) of 64.6 mmHg. Computerized tomography(CT) was checked due to multiple nodules seen in both lower lung fields of the chest X-ray. CT revealed multiple pulmonary arteriovenous malformations in both the mid and lower lung fields. Dyspnea was uncorrected by the application of oxygen. Coil embolization showed improvement of PO2 and dyspnea. The CT follow up at 9 months after the procedure showed no progression of the arteriovenous malformation without any additional symptoms nor dyspnea.
권세훈,김형호,강지인,하재하,한경택,이재록,김동민,권용은,윤성호,이승일 朝鮮大學校 附設 醫學硏究所 2007 The Medical Journal of Chosun University Vol.32 No.1
Scrub typhus is a potentially fatal infectious disease caused by the organism Orientia tsutsugamushi. Clinical manifestations are fever, skin rash, eschar and varying degree of respiratory distress. The pleural effusion in scrub typhus is rare and secondary to the destruction of vascular endothelium. Because the respiratory symptoms are generally mild and the pleural effusion in scmb typhus is rare than in interstitial pneumonia, there are few comments about the characteristics of scmb typhus with pleural effusion. So we made the comparative study of scmb typhus patients between with pleural effusion and without pleural effusion. 연구배경 치명적일 수 있는 감염질환 중 하나인 쯔쯔가무시중(Scrub typhus)에서 드문 흉막삼출을 동반한 환자에 대한 고찰은 다른 문헌에서도 자주 언급되지 않았다. 따라서 본 저자들은 흉막삼출이 있는 경우와 없는 경우에 따른 쯔쯔가무시중 환자들을 비교하고자 하였다. 방법 2003년에서 2006년까지 조선대학교 병원 내과에 입원중인 환자 중 쯔쯔가무시중 진단을 받은 총 109명의 환자를 대상으로 하여 흉부 X선 검사 및 혈청학적 검사(CPK, LDH, ESR, CRP, AST, ALT, ADA), 혈액학적 검사(WBC, PLT) 및 백분율 검사등을 실시하였다. 결과 흉막삼출이 있는 환자들의 경우 흉막 삼출이 없는 환자들에 비해 ESR 수치가 통계학적으로 의의있게 높았다(p-vaule < 0.05). 결론 흉막삼출 유무에 따른 쯔쯔가무시중 환자간의 비교에 있어 ESR 수치가 통계학적인 의의를 가졌다.
E-learning의 정서적 반응 및 학습성과가 전이성과에 미치는 영향 : 직무몰입의 매개효과를 중심으로
권오영,임효창,김세종 한국직업능력개발원 2008 직업능력개발연구 Vol.11 No.3
최근 정보통신기술의 발달에 따라 기업 교육훈련 체계가 전통적인 소집형 교육에서 e-learning으로 전환되고 있다. 기업교육의 궁극적인 성공은 교육을 이수하고 난 뒤 현업에 돌아가서 자신이 배웠던 교육내용을 실무에서 적극적으로 사용함으로써 전이성과를 높이는 데 있다. 본 연구는 기업교육의 전이성과에 영향을 주는 제 요인들을 살펴보는 것이 연구목적이다. 전이성과 결정요인으로 기업교육의 일차적 성과인 정서적 반응과 학습성과를 가정하고, 이들 간의 관계에 영향을 미치는 직무몰입의 매개효과를 실증 분석하였다. 이를 위하여 국내 기업교육 전문업체 C사와 직장인 재교육 교육기관인 K기관으로부터 최근 3개월에서 6개월 사이에 e-learning을 이수한 피교육자를 대상으로 설문조사를 실시하였다. 그리고 구조방정식모형에 의한 분석결과를 제시하고 토의하였다. 분석 결과, 직무몰입의 매개효과가 검증되었으며 분석 결과에 대한 해석 및 토론을 하였다. The development of information technologies has contributed virtual training as one of important education methods. E-Learning in firms provides trainees with more education opportunities in diverse ways. It has developed a range of innovative services with an one-stop solution of education within the electronic sector. Also under the e-learning environment, trainees can undertake customized training packages at anytime and any places. Moreover, information technology allows both the trainers and other trainees to be decoupled in any of the elements of time, Place, and space. This study explores the relationship between reaction/learning performance and transfer performance, and analyzes the mediating effect of individual characteristics on training effectiveness in e-learning settings. Based on the previous literature conducted on the traditional training environment, four sub-hypotheses are developed and tested by questionnaires survey data. The collected data have been analyzed by SPSS12.0 Results indicate that 1) reaction to the e-learning program are revealed as factor affecting the improvement of the transfer performance; and 2) mediating effects of personal characteristics(job involvement) are partially identified. The contribution and limitations of this research are also discussed with future studies.