http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
황색 포도상구균의 vancomycin 내성 원인 유전자의 동정
전준연,양영기,송민동 조선대학교 부설 유전생물공학연구소 1991 유전생물공학연구지 Vol.1 No.1
임상 분리되는 Gram 양성균인 황색 포도상구균(Staphyhcoccus aureus)에 대한 각종 학생물질의 최소 발육저지농도 측정(Minimal Inhibitory Concentration: MIC test)과 내성 pattern을 조사하였으며, 이들 균주 중 특히 vancomycin에 대하여 높은 내성을 나타내는 균주(Vancomycin resistant Staphylococcus aureus: VRSA)에 대한 vancomycin 내성원인 유전자의 탐색 및 cloning을 실시하여 vancomycm 내성기구의 연구에 필요한 조사를 수행하였다. Vancomycm에 내성인 균주(VRSA)를 고온(43.5℃) 처리하여 계대 배양을 한 다음, replica plating method에 의 해 vancomycin 감수성 균주(Vancomycin-sensitive Staphylococcus aureus: VSSA)를 얻었으며, VRSA 균수와 VSSA 균주로부터 membrane protein을 준비한 다음 SDS-poly-acrylamide gel electrophoresis(SDS-PAGE)로 전기 영동하여 그 단백질 pattern을 비교한 결과, VRSA 균주에서는 분자량(Mr: relative molecular weight)이 약 127Kadl 그리고 30Kdal 정도 되는 부위에서 vancomycin 내성에 관계되는 듯한 특이적인 단백질을 관찰할 수 있었다. 그러나 VSSA 균주에서는 이러한 단백질을 관찰할 수 없었다. 한편 이들 균주로부터 plasmid DNA를 분리한 다음 agarose gel electrophoresis하여 그 pattern을 분석한 결과, VRSA 균주에서는 약50Kb부위에서 plasmid DNA밴드가 관찰되었으나 VSSA 균주에서는 아무런 밴드도 관찰되지 않았다. 이상의 결과로 볼때 vancomycin 내성유전자는 plasmid DNA상에 존재한다고 생각되어진다. This study was carried out to study the characterization of the gene that is responsible for the vancomycin-resistant Staphylococcus aureus (VRSA) In order to obtain vancomycin-sensitive S. aureus(VSSA)from VRSA stain, vancomycin-resistant S. aureus(VRSA) was subcultured twice at the high temp.(43.5℃)and then VSSA was obtained by replicaplating method after MIC test with vancomycin in high temp. treted VRSA strain. Membrane proteins were prepared from VRSA and VSSA strain and protein patterns of those were compared bny 7.5% SDS-polyacrylamide gel electrophoresis. Only in VRSA strain appeared novel protein bands at a position about 120 Kdal, 80 Kdal and 30Kda1, but it did not appear in VSSA strain. The patterns of plasmid DNA in VRSA and VSSA strain were clearly classified. Plasmid DNA band in VSSA strain appeared at a position about 50Kb, but it did not appear any band in VSSA strain. These results suggested that plasmid DNA may be encode the gene that is responsible for vancomycin-resistance.
전민경,윤기영,최호정,정성목,송근호,이영원,박성준 忠南大學校 獸醫科大學 附設 動物醫科學硏究所 2008 動物醫科學硏究誌 Vol.15 No.1
A 8-year-o1d castrated male Shit-tzu dog was presented with chronic, severe and recurrent bilateral otitis externa. Clinical signs were stenosis, swelling, severe discharges from external auditory canal and pruritus of the ear. A diagnosis of the patient was made based on history, Physical examination, otoscopic examination, cytological examination and radiography. The dog was diagnosed to end-stage otitis externa and followed by treatment with systemic cyclosporine administration and topical solution. Clinical symptoms were resolved after 4 weeks cyclosporine therapy.
廢CRT의 再活用 工程에서 발생한 슬러지로부터 Y의 회수
田埈美,李在天,鄭鎭己,金南澈 공주대학교 자원재활용 신소재 연구센터 2002 센터사업 성과집 Vol.- No.1
폐CRT의 재활용 공정에서 Panel 유리에 도포 된 형광체의 제거 시 발생하는 슬러지로부터 Y를 회수하는 연구를 수행하였다. HCl 및 NHO_3을 사용하여 Y를 침출하였으며 산 농도, 침출온도, 침출시간, 광액농도가 침출율에 미치는 영향을 조사하였다. 또한 침출액으로부터 Y와 Pb를 침전 법으로 회수하는 실험을 행하였다. 슬러지로부터 HCl 및 HNO_3에 의한 Y의 침출거동은 유사한 경향을 나타내었다. 광액농도를 280 g/L로 하여 90℃에서 3.0M HCl 및 HNO_3으로 침출 하였을 때 시간에 따라 Y의 침출율은 증가하다가 40분 이상에서는 각각 93%, 90%로 일정한 침출율을 나타내었다. 침출액에 H_2C_2O_4을 첨가하여 Y를 회수하였으며 Pb는 Na_2SO_4를 가하여 PbSO_4로 제거하였다. A study on the recovery of yttrium was conducted using the phosphor sludges generated in the recycling process of obsolete CRTs. Yttrium was leached by HCl and HNO_2. The leaching efficiency of yttrium was extensively investigated in terms of acid concentration, leaching temperature and time, and pulp density. Yttrium and lead was recovered from leaching solutions also by precipitation method. The leaching behavior of yttrium was similar in both acids. The leaching efficiency of yttrium for both acids increased with time at the conditions of 3.0M, 90℃, and 280 g/L of pulp density. After 40 minutes, it was saturated to 93% and 90% for HCl and HNO_3, respectively. Yttrium was recovered from leaching acid solution by the addition of H_2C_2O_4 while lead was removed as PbSO_4 by Na_2SO_4.
전태보,김기동,오준형 江原大學校 産業技術硏究所 2005 産業技術硏究 Vol.25 No.A
Semantic object model has widely been recognized as an alternative data modeling approach to entity-relationship model for database system design. In this study, we have presented a semantic object model for intermediary type shopping mall consisting of multiple buyers and sellers. Essential processes and information with regard to the customer management, product management, price estimation, product order etc. have been considered for this study. Upon careful examination and analysis of them, a detailed semantic objects and attributes have been drawn and structured into semantic object diagrams. The final objects were converted into an entity-relationship diagram so that intuitive comparison could be made for relational database design. The results in this study may form a conceptual framework for both academic concerns and more complicated system applications.
김재홍,윤기범,박평원,김영진,전경민,김영태,김중환,곽호,구상완,송민석,유옥,지혜구,김동원,문상은,박영립,정승호,성범진,성순제,엄주용,황정열,이기홍,이주협,전태진 대한화학요법학회 1994 대한화학요법학회지 Vol.12 No.1
The prevalence of PPNG among pretreated gonorrhea cases isolated at the STD clinic of Choong-Ku Public Health Center in Seoul has been studied and reported annually since 1981. In 1991, 123 strains of N.gonorrhoeae were isolated, among which 58(47.1%) were PPNG. In 1992, 98 starains of N.gonorrhoeae were isolated, among which 51(52.0%) were PPNG. In all, 109(49.3%) strains were found to be PPNG among 221 strains isolated between 1991-1992. The prevalence of PPNG in Seoul showed increased tendency till 1989, thereafter, it has been stationary or slightly decreasing.
Jeon, Jong-Ki,Kim, Chang-Jun,Park, Young-Kwon,Ihm, Son-Ki 한국화학공학회 2004 Korean Journal of Chemical Engineering Vol.21 No.2
The effects of potassium or lanthanum additives on the catalytic properties of alumina-supported cobalt catalysts were examined through carbon monoxide hydrogenation reaction. The catalysts were characterized by hydrogen or carbon monoxide chemisorption, oxygen titration, and temperature-programmed desorption. The reactions were carried out at 270℃ and atmospheric pressure. When a small amount of potassium was added to alumina-supported cobalt catalysts, the amount of hydrogen adsorption decreased more significantly than that of carbon monoxide adsorption, and the extent of reduction also decreased. With the addition of potassium, the overall carbon monoxide conversion decreased, while the selectivity to higher hydrocarbon and olefin increased. The effect of lanthanum on activity and selectivity in carbon monoxide hydrogenation was less significant than the effect of potassium. Temperature-programmed desorption showed that the presence of additives changed adsorbed state of CO on cobalt.
Accumulate Repeat Accumulate Check Accumulate Codes
Jeon, Ki Jun,Kim, Kwang Soon IEEE 2017 IEEE TRANSACTIONS ON COMMUNICATIONS Vol.65 No.11
<P>In this paper, a novel accumulate-repeat-accumulate-check-accumulate (ARACA) code is proposed as a subclass of protograph-based low-density parity-check (LDPC) codes. The key feature of the proposed ARACA code is represented by the outer connection doping in the protograph. This feature can provide the linear minimum distance growth (LMDG) property at a good iterative decoding threshold while maintaining an efficient encoder structure. The effect of the outer connection doping on the typical minimum distance, the iterative decoding threshold, and the LMDG property is discussed and analyzed by comparing case examples and using the asymptotic protograph ensemble weight enumerator. Some good ARACA code protographs are provided for a wide range of code rates. In addition, an efficient and universal encoding procedure and the corresponding encoder structure are provided for them. The performance of the proposed ARACA code is evaluated and compared with well-known good LDPC codes. The simulation results confirm the superiority of the proposed ARACA codes in terms of encoding complexity and frame error rate performance, especially at low-rates in an ultra-reliable regime.</P>