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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.
Jung-Hye Eom,Young-Wook Kim 대한금속·재료학회 2012 METALS AND MATERIALS International Vol.18 No.2
The effects of the initial α-phase content on the microstructure and flexural strength of macroporous sili-con carbide (SiC) ceramics were investigated. When β powder or a mixture of α/β powders containing small (≤3 %) amounts of α powder were used, the grains showed a platelet-shape. In contrast, the grains had an equiaxed-shape when α powder or a mixture of α/β powders containing large (≥50 %) amounts of α powder was used. The flexural strength increased with increasing α-SiC content in the starting composi-tion, whereas the porosity decreased with increasing α-SiC content. The strength of the macroporous SiC ceramics was affected mostly by the porosity when the grain size was smaller than 10 µm, whereas the strength was controlled by pore size and grain size when the microstructure consisted of large (>10 µm)platelet grains.
Eom, Jung-Hye,Kim, Young-Wook,Kim, Kwang Joo,Seo, Won-Seon Elsevier 2018 Journal of the European Ceramic Society Vol.38 No.2
<P><B>Abstract</B></P> <P>The electrical and thermal conductivities of bulk barium-added silicon oxycarbide (SiOC-Ba) ceramics are investigated. The SiOC-Ba ceramics exhibited improved electrical and thermal conductivities upon increasing the sintering temperature from 1450°C to 1650°C. Precipitation of graphitic carbon clusters observed by Raman spectroscopy and high-resolution transmission electron microscopy is attributed to the phase separation during the fabrication process. The increase in the electrical conductivity can be rationalized in terms of an increase in the density of the <I>sp<SUP>2</SUP> </I> CC bonds within the carbon clusters. The increase in the thermal conductivity is mainly attributed to the formation of interconnected graphitic clusters in the SiOC matrix and SiC embedded in the clusters. The electrical and thermal conductivities of the SiOC-Ba ceramics sintered at 1650°C are 14.0Ω<SUP>−1</SUP> cm<SUP>−1</SUP> and 5.6W/mK, respectively, at room temperature. The electrical conductivity of SiOC-Ba sintered at 1550°C is 5.3Ω<SUP>−1</SUP> cm<SUP>−1</SUP> and 7.0Ω<SUP>−1</SUP> cm<SUP>−1</SUP> at 2 and 300K, respectively.</P>
( Hye Mi Eom ),( Young Nam Kim ),( Byung Hee Choi ),( Eun Jeong Jeong ),( Jung Mi Byun ),( Dae Hoon Jeong ),( Moon Su Sung ),( Kyung Bok Lee ),( Ki Tae Kim ),( Hye Kyoung Yoon ) 대한산부인과학회 2016 Obstetrics & Gynecology Science Vol.59 No.3
Placental chorioangioma is a benign non-trophoblastic tumor of the placenta that can have various adverse effects on the mother and fetus depending on its size. Chorioamniotic membrane separation is rare condition of detachment between the amniotic membrane and chorionic membrane. Chorioamniotic membrane separation after the second trimester of pregnancy is usually occurs after invasive procedures or may occur spontaneously; it is mostly associated with fetal abnormalities. Here, we report a case of chorioamniotic membrane separation that might be occurred caused by the seromucinous secretion from a placental chorioangioma.
Effect of Strontium Carbonate Content on Flexural Strength of Clay-Based Membrane Supports
Eom, Jung-Hye,Kim, Young-Wook,Song, In-Hyuck The Korean Ceramic Society 2015 한국세라믹학회지 Vol.52 No.6
The effect of $SrCO_3$ content on the microstructure, porosity, flexural strength, and pore size distribution of clay-based membrane supports was investigated. Green compacts prepared from low cost materials such as kaolin, bentonite, talc, sodium borate, and strontium carbonate were sintered at $1000^{\circ}C$ for 8 h in air. It was possible to control the porosity of the clay-based membrane supports within the range of 33% to 37% by adjusting the $SrCO_3$ content. The flexural strength of the clay-based membrane supports was found to strongly depend on their porosity. In turn, the porosity was affected by the $SrCO_3$ content. The average pore size and flexural strength of the clay-based membrane supports containing 4 wt% $SrCO_3$ were $0.62{\mu}m$ and 33 MPa at 34% porosity.