서울의 Penicillinase Producing Neisseria gonorrhoeae 발생빈도(1998)

김재홍,김준호,반재용,이정우,황성주,정준규,정성태,강진문,조흔정,홍창의,정혜신,이한승,김이선,이봉길,이종호,선영우,한기덕,윤성필,이성훈,안종성,박석범,문승현,조항래,김형섭,류지호,황재영,박준홍,손상욱 한양대학교 의과대학 2001 한양의대 학술지 Vol.21 No.1

In recent years, gonorrhea has been pandemic and remains one of the most common STDs in the world, especially in developing countries. For the detection of a more effective therapeutic regimen and assessing the prevalence of Penicillinase Producing Neisseria gonorrhoeae(PPNG), we have been trying to study the patients who have visited the Venereal Disease Clinic of Choong-Ku Public Health Center in Seoul since 1980 by menas of the chromogenic cephalosporin method. In 1998, 93 strians of N. genorrhoeae were isolated, among which 60(64.5%) were PPNG. The prevalence of PPNG in Seoul, which had been decreased to 39% in 1996 after a peak of 74.3% in 1993, is increased to 64.5% in 1998.

강원도 화천군 수달(Lutra lutra) 서식지의 식생 구조

서형수 ( Hyung Soo Seo ),신영섭 ( Young Seob Shin ),이경은 ( Kyung Eun Lee ),김윤미 ( Yoon Mi Kim ),전미나 ( Mina Jeon ),남택우 ( Taek Woo Nam ),한성용 ( Sung Yong Han ),정연숙 ( Yeonsook Choung ) 한국하천호수학회 2014 생태와 환경 Vol.47 No.special

In order to determine whether vegetation would be one of the factors for the selection of otter home range, vegetation structure and other potential factors were studied in Hwacheon, Korea. Thirteen sites, otter’s activity found and not found, were investigated in North Han River and connected tributary streams of Hwacheon-gun. Three types of vegetation were classified by cluster analysis, which is short grass, tall grass and shrub type. Vegetation zone of each channel is composed of either one type, or mosaic of tall grass and shrub type. Short grass type is common in Lake Paro and upper North Han-river where water level is highly variable throughout a year. Therefore, annual species such as Persicaria nodosa, Fimbristylis dichotomam and Chenopodium ficifolium are the most dominant. Shrub type is common at the downstream sites of Jichon stream and along mainstream of North Han River down Lake Paro. A shrub species, Salix koreensis, is the most common. Tall grass type is dominant occupying the most vegetation zone of the tributary channels. Phragmites japonica is absolutely dominant. Due to its dense cover, a few plant species are co-existed. Otter activity was found in all three vegetation types and no marked activity was found at some sites of tall grass type. There is no difference in species composition and physiognomy between tall grass sites with and without otter activity, while it shows significant difference in fish availability between two groups. Overall we found that home range of otters in the region is along the mainstream and downstream of tributary streams with high fish availability in all vegetation types and in various human activity levels.

항만배후도로 건설재원 분담방안에 관한 연구

한상용 韓國海運物流學會 2006 해운물류연구 Vol.48 No.-

유리폐기물과 하수슬러지 소각재의 고형화 처리연구

한상목,신대용,윤봉구,김승겸 강원대학교 부설 석재복합신소재 제품연구센터 2002 석재연 논문집 Vol.7 No.-

하수슬러지 소각재, 폐유리분말 및 고로슬래그의 고형화에 의하여 건자재를 제조하였다. 하수슬러지 소각재는 SiO_2와 Al_2O_3가 75 wt%, Fe_2O_3가 8.21 wt%, 폐유리분말은 SiO_2 71.4 wt%, Na_2O 14.43 wt% 및 CaO 9.32 wt%, 고로슬래그는 SiO_2 33.4 wt%, CaO 41 wt% 및 Al_2O_3 14.5 wt%를 함유하여 세라믹스 제조원료로 사용이 가능하였다. 하수슬러지를 800℃에서 2시간 하소한 무기질분말을 분쇄하여 하수슬러지 소각재를 제조하였다. 30∼70 wt%의 하수슬러지 소각재, 30∼70 wt%의 폐유리분말 및 10∼30 wt%의 고로슬래그를 혼함하여 950∼1,100℃에서 2시간 소성하여 시편을 제조하였다. 하수슬러지 소각재 첨가량이 감소하고 폐유리분말의 첨가량과 소성온도가 증가하면 부피비중과 압축강도는 증가하였으나 기공률과 흡수율은 감소하였다. 1,050℃에서 소성한 시편(No. 1, 3, 5 및 7)의 부피비중은 1.70∼1.83, 기공률과 흡수율은 0.3∼2.4% 및 0.1∼1.5%, 압축강도 272∼323 kgf/㎠을 나타내었다. 고로슬래그를 첨가하여 1,100℃로 소성한 시편(No. 8, 9, 및 10)의 부피비중은 1.82∼2.11 및 압축강도는 350∼671 kgf/㎠이었다. 하수슬러지 소각재, 고로슬래그 및 시편의 중금속출량은 매립지 침출수배출 허용기준치보다 낮아, 본 연구에서 제조한 시편은 주변 환경에 해가 없어 건자재로의 이용이 가능하였다. An experimental study for the constructional material by solidification using sewage sludge ash, waste glass powder and blast furnace slag was carried out in the senses of waste materials disposal and utilization. The reusability of sewage sludge ash, waste glass powder and blast furnace slag as a raw material in the manufacturing process of ceramics was highly expected because the chemical compositions of these waste materials were mostly SiO_2 and Al_2O_3. Sewage sludge ash was fabricated by calcined at 800℃ for 2 hours and obtained by the crushing. The mixture of 30∼70wt% of sewage sludge ash, 30∼70 wt% of waste glass powder and 10∼30 wt% of blast furnace slag were heated at 950∼1,100℃ for 2 hours. The density and the compressive strength of specimen increased with increasing the sintering temperature and decreasing the addition amount of sewage sludge ash, No. 1, 3, 5 and 7 specimens showed the bulk density of 1.70∼1.83, porosity of 0.3∼2.4%, water absorption of 0.1∼1.5% and compressive strength of 272∼323kgf/㎠. And, that of the No. 7 specimen heated at 1,100℃ increased with increasing the addition amount of blast furnace slag, and for No. 8, 9 and 10 specimens, bulk density was 1.82∼2.11 and compressive strength was 350∼671 kgf/㎠. An extraction test for specimen to detect toxic materials showed below the permitted standard of land-filling extractable heavy metal contents. It was founded that the specimen were useful for the constructional materials.

대량의 각혈로 사망한 장티푸스 1예

한상우,유진홍,권순석,김성훈,박지찬,홍은정,최경성,박용완,장준희,안지원,박유경,강지영,박상미,신완식 대한감염학회 2004 감염과 화학요법 Vol.36 No.5

We experienced a 25 year-old male patient with typhoid fever complicated with massive hemoptysis. Pulmonary complication in typhoid fever is very rare and to our knowledge, there has been no report of hemoptysis as a main cause of death with this disease. We herein report a rare case of typhoid fever.

수종보익제가 면역세포의 조절 및 Apoptosis에 미치는 영향

한종현,강성용,정현우,오찬호,권진,은재순 대한본초학회 1997 大韓本草學會誌 Vol.12 No.1

The effects of several tonifying prescriptions on the apoptosis of transplanted L1210 cells and the regulation of immune cells in L1210-transplanted mice were studied. Sa-Mul-Tang(SMT), Sa-Kunja-Tang(SKT), Sipjeon-Daebo-Tang(SDT) accelerated the apoptosis of transplanted L1210 cells, and SMT and SKT reduced the mitochondrial transmembrane potential of transplanted L1210 cells. SMT promoted the proliferation of thymocytes and splenocytes in L1210-transplanted mice. Whereas SMT increased CD8+ T_c/T_S cell, Bojung-Ikki-Tang(BIT) decreased CD4+ T_H cell population in the thymocytes of L1210-transplanted mice. SMT and SKT increased the lucigenin chemiluminescence from peritoneal macrophage of L1210-transplanted mice. These results indicate that SMT and SKT have an inductive action of apoptosis of transplanted L1210 cells and peritoneal macrophage activation.

재생 Al₂O₃분말을 이용한 Al₂O₃세라믹스의 소결 특성 연구

한상목,신대용 강원대학교 석재복합신소재제품연구센터 2001 석재연 논문집 Vol.6 No.-

Al2O3 세라믹스의 재활용을 위한 소결거동을 조사하기 위하여 재생 Al2O3 분말의 첨가량, 입자크기 및 소결온도에 따른 시편의 물리ㆍ기계적 특성을 측정하였다. 1,650℃에서 소결한 순수 Al2O3 시편을 급랭에 의하여 500㎛ 정도의 입자로 파쇄한 후, 자동유발을 이용하여 40㎛ 전ㆍ후로 분쇄하였다. 분쇄한 Al2O3 분말과 순수한 Al2O3 분말을 적정비로 혼합 후, 재소결에 의하여 제조한 Al2O3 세라믹스의 재생 Al2O3 분말의 첨가량, 입자 크기 및 소결온도에 따른 시편의 밀도 흡수율, 기공률, 3점곡강도 및 SEM 분석을 행하였다. 재생 Al2O3 분말의 첨가량이 증가함에 따라 시편 내에 존재한 기공에 의하여 밀도와 3점곡강도는 감소하였으나, 1,650℃에서 소결한 시편의 3점곡강도는 200 MPa 이상으로 구조용재료로 사용이 가능하였다. 또한, 재생 Al2O3 세라믹스 100wt%의 유리분말을 첨가하요 1,650℃에서 소결한 시편은 첨가한 유리분말의 고온용융에 의하여 생성한 액상에 의하여 물리ㆍ기계적 성질은 감소하였다. The sintering behavior of the Al2O3 composites for recycling Al2O3 powder was investigated as a function of the recycling Al2O3 powder and particle size with respect to physical and mechanical properties. Pure Al2O3 specimen was fabricated by sintering and was crushed into powder under 40㎛ in particle size by thermal shock treatment and automatic mortar crushing. Then, the crushed Al2O3 powder was mixed with pure Al2O3 powder, and the mixture was subjected to re-sintering to reuse Al2O3 composites. The reclaimed Al2O3 specimen were investigated by 3-point bending strength and SEM observation of microstructure. Density and 3-point bending strength of the reclaimed Al2O3 composites decreased as the addition amounts of recycled Al2O3 powder increased. The average 3-point bending strength of specimens heated at 1,650℃ were over 200 MPa. SEM observation indicated that pore distribution was inhomogeneous and pores were still resided in specimen, Pores, consequently, formed cracks which markedly decreased bending strength. Futhermore, 10wt% glass containing reused Al2O3 specimens were decreased physical and mechanical properties, so called over-sintering behavior.

콘크리트 구조물용 GFRP리바의 기계적 특성에 관한 연구

한길영,이동기,김성용,전상기,최종대,박준식 조선대학교 에너지.자원신기술연구소 2000 에너지·자원신기술연구소 논문지 Vol.22 No.2

In this paper was studied on the mechanical characteristics of Glass Fiber Reinforced Plastics(GFRP) of the steel bar it is to replace The advantage of FRP such as high strength low weight and chemical inertness or noncorrosiveness can be fully exploited. GFRP bar were successfully fabricated at 10mm nominal diameters and hollow types using a pultrusion method Tensile and bending specimens from this bar were tested and compared with behavior of GFRP rebar and steel bar.

포도 중 Tebuconazole의 잔류성에 미치는 몇 가지 변동요인의 영향

한성수,노석초,마상용 한국환경농학회 2004 한국환경농학회지 Vol.23 No.3

Tebuconazole의 안전성 평가를 위한 기초자료를 얻기 위하여 tebuconazole의 처리시기, 처리횟수, 봉지 씌우기(괘대) 및 세척방법에 따른 잔류성을 조사하였다. 수확 전 처리횟수가 3회~5회 처리로 증가함에 따라 tebuconazole의 잔류량이 높게 나타났으며, 처리횟수가 동일한 조건에서는 최종 처리후 경과일수가 길수록 잔류량이 적게 나타났다. 처리횟수 및 최종 처리 후 경과일수가 동일하더라도 최초 약제처리 시기에 따라 잔류량의 차이가 나타나 기상 조건 및 과실의 생육상태에 따른 잔류량 변동 가능성이 시사되었다. 과실 1개당 무게가 2.5~7.5 g의 범위에서 과실 개체의 크기가 작을수록 높은 잔류량을 보였으며, 잔류성분의 대부분이 과피에 분포하였다. 괘대 과실의 과피에서 무괘대 과실의 과피에 비하여 매우 낮은 잔류량을 보였다, 과육 중의 잔류량은 괘대 포도에서는 검출한계 이하로, 무괘대 포도에는 0.05 mg/kg 수준으로 분포하였다. 세척 전의 잔류량이 0.86 mg/kg 수준인 포도 시료에서는 물에 1분간 침지하고 흐르는 물에 1~2회 세척 시에 잔류량의 약 25~67%가 제거되었으며, 침지처리 후 3회 세척한 시료에서는 검출한계 이하의 잔류량을 보였다. 세제용액에 침지하고 흐르는 물에 세척한 경우에는 물 침지에 비하여 높은 제거효과가 나타났으며, 세척 전 포도 중의 잔류량이 낮을수록 제거효과가 높게 나타났다. Dissipation pattern of tebuconazole was evaluated by establishing application methods of the fungicide, paper-bagging of grape during growth and washing of grape after harvest. Application times increased from three to five resulted in high levels of residues in grape. Tebuconazole in grapes was present in different residual patterns with periods after final treatment, ranging from 7 to 25 days. Significant differences in the residual patterns were also found when tebuconazole was treated during three different application periods, possibly due to meteorological condition and/or grape growth during each period. At the range from 2.5 g to 7.5 g of grape granules, residues were higher in small-sized grape than in big-sized grape and were mostly distributed on the peel of the grapes. Paper-bagging was a critical factor for reducing the fungicide residue on the peel. Flesh of bagged and no-bagged grape had very low level of residues, 0.01 mg/kg and 0.05 mg/kg, respectively. Residues on grape was effectively eliminated with the washing methods suggested, a consecutive sinking-washing system. Using of detergent solution during washing showed maximum residue reduction from grape. The washing methods showed effective action on the removal of lower content, providing complete elimination, or almost, of the residues.

바렉터 다이오드를 이용한 가변 BPF 설계 및 제작

한재권,이행수,홍성용 충남대학교 산업기술연구소 2005 산업기술연구논문집 Vol.20 No.1

This paper presents a tunable filter that can be used in front stage of UWB receiver operating under 2GHz frequency range. It presents the optimum design method of comb-line structure tunable filter keeping the fixed bandwidth and attenuation characteristic in the tunable frequency range. This filter is implemented by applying a tunable capacitor, obtained by reverse-biased varactor diode, to a capacitor used in SIR structure. As a result of tunable filter measurement, the center frequency was little moved down. Its bandwidth was almost corresponded with the result of a simulation but did not meet the given 100MHz bandwidth.