희토류 Nitroprusside 분말들에 대한 Mo¨ssbauer 효과 연구

김형상,홍치유,김순구,백승도 東國大學校 1998 東國論叢 Vol.37 No.-

We observed the ^57Fe Mo¨ssbauer spectra at room temperature of sodium nitroprusside. Na_2[Fe(CN)_5NO)·2H_2O single crystal, europium nitroprusside, Eu_2[Fe3(CN)_5NO]·9H_2O powder, praeseodymium nitroprusside and Pr_2[Fe(CN)_5NO]·6H_2O powder which is substituted cations as rare earth element. The Mo¨ssbauer parameters, isomer shifts(I. S.). quadrupole splittings (Q.S.). full width half maxima (F.W.H.M..Γ) and Mo¨ssbauer Lamb factors in two powder samples are compared with sodium nitroprusside single crystal for analysis of the electronic properties of the materials. We have found that values of quadrupole splitting in two powder samples are positive larger than these in sodium nitroprusside single crystal and values of isomer shifts of these in three samples are equal within experimental errors. Also we found that values of Mo¨ssbauer Lamb factor in two powder samples are smaller than theses in sodium nitroprusside single crystal and theses values in two powder samples are equal within experimental errors.

S. pneumoniae 호흡기감염 마우스에서 Rufloxacin의 항균력에 대한 조직학적 연구

구세광,이형식,김종대,최해윤,이재현 慶山大學校 基礎科學硏究所 2002 基礎科學 Vol.6 No.1

Streptococcus pneumoniae ATCC 6303을 이용한 국소 호흡기 감염 마우스 모델에서 Rufloxacin (RUFX)의 in vivo 항균력을 조직학적으로 평가하기 위하여 생균수와 폐의 조직·병리학적 변화를 관찰하였던 결과, 다음과 같은 결과를 얻었다. 1) 생균수는 RUFX 투여군에서 Control 군에 비해 유의성 있게 감소되었으며, 2). Control 군에서는 현저한 폐내 염증세포의 침윤, 출혈 및 폐포 벽의 비후가 조직학적으로 관찰되었으나, 이러한 조직학적 소견들은 RUFX 투여군에서 Control 군에 비해 현저히 있게 감소되었고, 3). LSA (luminal surface of alveoli %)는 Control 군에서 Sham 군에 비해 현저히 감소된 반면, RUFX 투여군에서 Control 군에 비해 유의성 있게 증가되었다. 이상에서 RUFX의 Sterptococcus pneumoniae에 대한 항균력이 조직학적으로 관찰되었다. In order to evaluate the in vivo effect of rufloxacin (RUFX), the viable bacterial number and histopathological changes were monitored after experimental respiratory infection with Sterptococcus pneumoniae ATCC 6303. In RUFX, the viable bacterial numbers were significantly and dose-dependently decreased compared to that of Control group. In Control group, severe infiltration of inflammatory cells, hemorrhage and hypertrophy of alveolar linings were demonstrated at microscopical levels. However, these abnormal histopathological changes were significantly and dose-dependently decreased compared to that of Control group in RUFX group. And also in RUFX group, the LSA (luminal surface of alveoli %) were significantly and dose-dependently increased compared to that of Control group. According to these results, it is considered as the in vivo antibacterial activity of RUFX was histologically showed against Steptococcus pneumoniae ATCC 6303 infection of respiratory tract in this study.

韓國 복싱 80年史

김정수,손형구 한국체육대학교 1998 敎養敎育硏究所 論文集 Vol.- No.3

Modern sports and sportsmanship which was introduced by the foreign missionaries during the years of 1870's, had greatly influence to Korean who were struggling with Japanese ruling and national independence in 1990's. 'Yoo Gack Kwon' club which was formulaed by Park, Seung-Pill, is recognized as the introducing of boxing gloves by Mr. Gillette, the American advisor of Koran YMCA at that time. History of Koran boxing game has five distinctive periodical characteristics. The early development has been made from 1912 to 1935. From the year 1936 until 1944 could be named as the second stage of Korean boxing history. Through this perid which was under the Japanese ruling and depression, Korean boxing had made a gradual movement for international competition. The third stage would be from the national independence in 1945 to 1960, and few Korean boxing had more sctively participated in world events representing their home country. The fourth stage would be from 1961 until up to the present which includes the modern era, and Korean boxing has made a big sride in progress aling with the flourishing of other modern sports. Korean boxing which has relatively short time of history has made few recent victories for medal in 1984 LA Olympics, 1986 Seoul Asian Games and 1988 Seoul Olympics Games.

CATV 망에서의 고속 DATA 서비스를 위한 적정 셀 규모에 관한 연구

정래성,구대성,김형준,김필중,김종빈 조선대학교 전자정보통신연구소 2001 電子情報通信硏究所論文誌 Vol.4 No.2

Recently the surrounding of data communication industry has been changing through the rapid growth of the information technology, which has been sparked by the convergence of computer and optical fiber technology. This phenomenon requires broadband network to transmit video, audio and data at once. Multimedia and broadband services are provided widely over the Internet. The traditional telephone companies, CATV operators, and Internet service providers are all rushing to provide integrated services over their infra-structures. Among them, CATV seems to be the most promising from an economic perspective, because CATV infrastructure is already in place in a majority of homes and can deliver broadband service without requiring costly upgrade of the existing CATV systems. In this paper, analysis the problem of data services over CATV network, suggest size the proper cell for the high speed data services over CATV network.

抗生劑耐性傳達因子의 除去에 關한 實驗的 硏究

河大有,金炯魯,金圭次,李憲九 대한의학협회 1979 대한의학협회지 Vol.22 No.9

소아에서 발생한 골수이형성 증후군 2례

홍성진,윤석중,김성우,조형구,오명호,김기혁,이인성 건국대학교 의과학연구소 1996 건국의과학학술지 Vol.5 No.-

Myelodysplastic syndrome(MDS) is a group of acquired conditions characterized by progressive bone marrow failure associated with normocellular or hypercellular bone marrow that cannot be attributed to nutritional deficiency, chronic infection, or other chronic systemic illness, and cannot be reversed by the successful treatment of those conditions. Whereas the cases of secondary MDS occur at all ages, primary MDS is essentially a disease of elderly, though no age group is exempt and predomonant in men. The MDS is fundamentally clonal disorders at the level of the haemopoietic totipotent stem cell. Clinically, they are characterized by varing degrees of peripheral cytopenia(s) with morphological and functional abnormalities of blood elements. We have experienced two unrelated pediatric cases, who showed pancytopenia on admission and the characteristic marrow findings of MDS. The first case, a 12 months-old girl, showed increased reticulin with abnormal localization of immature precursor cells(ALIP) in her bone marrow, in addition to dysplastic features such as bi-and multi-nucleation of late normoblasts and internuclear bridging. She also showed 22% of blasts in her bone marrow cells thus classified in the category of RAEB-t after FAB classification. Also found were a chromosomal abnormality namely 46 XX t(14q21q), which was an unusual one. Her family brought her home and, 4 month later, she deceased. The second case, a 12 year-old boy, showed pancytopenia with Pseudo-Pelger-Huet anomaly in neutrophils but no blasts in the peripheral blood. Bone marrow of this case also showed the picture of dyserythropoiesis with binuclearity, internuclear bridging, nuclear fragments, multinuclearity of late normoblasts, in addition to megaloblastoid change in the normoblasts and increased mitosis in granulocytic series. No chromosomal abnormality was found. Classified as RA after FAB classification of MDS. Showed good response to conservative management for anemia for more than one year.

프리캐스트용 고성능 콘크리트의 내구특성 검토

정영화,윤경구,용석응,김형균 강원대학교 부설 석재복합신소재 제품연구센터 1999 석재연 논문집 Vol.4 No.-

포장용 콘크리트는 열악한 환경조건에 의해 손상을 받지 않을 정도의 충분한 내구성을 가지고 있어야 한다. 포장 콘크리트는 실질적으로 겨울철에 제설제로 인한 동해를 받는 열악한 환경에 놓이기 때문에 동결-융해에 대한 손실을 쉽게 받을 수 있다. 이 연구에서는 폴리프로필렌 섬유를 혼입한 포장 콘크리트의 내구특성을 검토하여 현장적용가능성을 검토하기 위하여 섬유종류, 섬유혼입율, 콘크리트 배합종류를 주요 실험변수로 하여 실내시험을 수행하였다. 이를 위하여 먼저 폴리프로필렌 섬유보강 콘크리트의 압축강도시험을 통하여 강도특성을 분석하고 박 저항성 시험을 통하여 내구특성을 분석하였다. 박리저항성 시험은 국내에서 제설제로 사용하고 있는 4%의 염화칼슘을 콘크리트시편 표면에 유지시켜 동결-융해 사이클을 진행시켜 매5사이클마다 겉보기 등급과 무게변화를 측정하였다. 그 결과, 압축강도는 섬유 혼입율이 증가할수록 증가하였으며, 망사형 섬유보다는 단사형 섬유가 강도증진에 효과적임을 확인할 수 있었다. 박리저항성은 섬유의 혼입율이 증가할수록 모든 배합에서 우수한 것으로 나타났다. 무게 변화는 모든 배합에서 단사형 섬유와 망사형 섬유 모두 혼입율이 증가할수록 무게 손실량이 섬유를 혼입하지 않은 시험편에 비해 1.85∼27.5%로 감소하는 것으로 나타나 박리저항성 증진에 효과적임을 확인할 수 있었다. 폴리프로필렌 섬유보강 콘크리트의 강도특성의 내구특성을 분석한 결과 고속도로 배합인 경우 단사형 섬유와 망사형 섬유 모두 혼입율 0.10%에서 강도와 내구성 증진효과가 가장 우수한 것으로 나타났다. 강도특성과 내구특성을 분석한 결과, 내구특성이 보통 콘크리트보다 내구특성이 우수하여 현장적용이 가능한 것으로 나타났다. Pavement concrete subjected to severe environmental condition may be vulnerable to frost attack practically where de-icing chemicals are used. This study focused on the investigation of durability characteristics of pavement concrete incorporating polypropylene fibers and application feasibility of these into the pavements of local roads and highway. A series of labortory tests were performed with main experimental variable such as fiber types, fiber contents and type of concrete mix. The test of compressive strength was executed as primary tests, before the durability tests such as a scaling resistance were performed. De-icing salt resistance test was progressed by recycling freeze and thaw in the presence of a 4% calcium chloride solution. The deteriorated surfaces were rated by visual inspection and the loss weight were measured at every 5 cycles. The compressive strength of polypropylene fiber reinforced concrete increased as the fiber contents increased. The loss of weight decreased by 1.85∼27.5% compared to those of plain concrete as the fiber contents increased in the all kind of concrete mix. Thus de-icing salt scaling resistance of polypropylene fiber reinforced concrete increased as the fiber contents increased in the all concrete mix. From the results of strength and durability of polypropylene fiber reinforced concrete, it was concluded that they may be applied to the pavement of local roads and highway due to their excellent durability characteristics superior to those of plain concrete.

뇨(尿)중 3-Methylhistidine 함량의 측정과 이용

정수현,서형주,김윤숙,이효구,강덕호 한국식품영양학회 1996 韓國食品營養學會誌 Vol.9 No.2

기존의 방법을 일부 수정하여 뇨중 3-methylhistidine을 분석하였다. 뇨중 3-methylhistidine을 fluorescamine 유도체화하여 HPLC에 주입하고 C_18 column과 10 mM acetonitrile/sodium phosphate buffer(pH 7.5)로 분리·용출시켜 형광검출기로 측정하였다. 3-methylhistidine의 체류시간은 7분 이내이었으며, histidine과의 분리상태도 서로 간섭함이 없이 양호하였다. 뇨에 3-methylhistidine을 첨가하고 이를 분석하였을 때의 회수율은 93∼106%로 높은 수준이었다. 체육학과 남학생중 웨이트 트레이닝 단련자와 비단련자를 대상으로 조사한 단기간의 웨이트 트레이닝에 따른 뇨중 3-methylhistidine 함량의 변화는 두 집단 모두 웨이트 트레이닝후의 3-methylhistidine 분비량이 유의하게 증가하였다. A modified method is given for the precolumn derivatization and subsequent high-pressure liquid chromatographic seperation of 3-methylhistidine from urine. The elution contained isocratic solution with acetonirile and 10 mM sodium phosphate(pH 7.5) requires less than 7 min. The recoveries of 3-methylhistidine from urine control were 93% to 106%. 3-Methylhistidine determinations were performed on urine samples from volunteers who were both male trained and non-trained physical undergraduates. As the result, urinary 3-methylhistidine content of volunteers increased significantly after weight training.

일부 도시지역 인문고교생의 체격과 영양상태에 관한 연구

윤태영,최중명,박순영,유동준,김형석,구도서,박양원 慶熙大學校 醫科大學 1986 慶熙 醫大 論文集 Vol.11 No.1

Trabecular bone score as an indicator for skeletal deterioration in diabetes.

Kim, Jung Hee,Choi, Hyung Jin,Ku, Eu Jeong,Kim, Kyoung Min,Kim, Sang Wan,Cho, Nam H,Shin, Chan Soo Issued for the Endocrine Society by the Williams & 2015 The Journal of clinical endocrinology & metabolism Vol.100 No.2

<P>Trabecular bone score (TBS) is a novel texture index that evaluates the pixel gray-level variations in lumbar spine dual-energy X-ray absorptiometry images and is related to bone microarchitecture independent of bone mineral density (BMD).</P>