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腸溶皮된 醫藥用 乳酸菌의 人共消化液內 活性에 관한 實驗的 硏究
이원창,용중환,추범수,김대선,송재옹 대한보건협회 1986 대한보건연구 Vol.12 No.2
In order to an observation and fundamental study on the behavior of enterocoated Lactobacillus acidophilus in the various artificial digestive fluids. It is hoped that the information will be use for reference in future endeavors of study in the field of Public Health and Applied Microbiology in Korea. The results were summerized as follows: 1) Behavior of enterocoated Lactobacilli in artificial gastric juice was not harmed in juice, because of its protective capsule called the container which can melt only intestinal tract. 2) Observed on the behavior of enterocoated Lactobacilli were showed tolerance to the artificial bile juice in 0.3% and enteric juice in pH 6.7.
Detection of the mycotoxin citrinin using silver substrates and Raman spectroscopy
Singh, D.K.,Ganbold, E.O.,Cho, E.M.,Cho, K.H.,Kim, D.,Choo, J.,Kim, S.,Lee, C.M.,Yang, S.I.,Joo, S.W. Elsevier Scientific Pub. Co 2014 Journal of hazardous materials Vol.265 No.-
We detected a trace amount of the mycotoxin citrinin using surface-enhanced Raman scattering (SERS) on silver nanoparticle (Ag NP) surfaces. The SERS substrate on hydrophobic Teflon films was also introduced to observe the citrinin peaks. A broad band at ~1382cm<SUP>-1</SUP>, which was ascribed to the symmetric carboxylate stretching mode, was observed in addition to an antisymmetric carboxylate stretching mode at ~1568cm<SUP>-1</SUP> in the Raman spectra. The spectral feature indicated that citrinin would adsorb on Ag NPs via its carboxylate form. Based on density functional theory (DFT) calculations, vibrational mode analysis was performed to compare the Raman spectra of citrinin. DFT calculations also predicted that a bidentate bridge configuration through O15 and O16 atoms in citrinin would be the most stable on three Ag atoms. After treating with Ag NPs, observation of citrinin peaks was attempted in fungal cells of Penicillium citrinum. This work may provide useful insights into the direct observation of the hazardous citrinin mycotoxin using SERS by understanding its adsorption behaviors on Ag surfaces.
우측폐의 형성 부전과 " Scimitar Sign " 을 보이나 좌심방으로 유입되는 우측 폐정맥을 보인 Scimitar Syndrome 1 예
김정한,이병철,김택수,추길연,박석오,천대철,조병섭,문제웅,안제곤,최대섭,권용화 대한내과학회 1995 대한내과학회지 Vol.48 No.2
The scimitar syndrome is a rare, complex, variable and congenital malformation of the right lung. These anomalies consist of anomalus pulmonary venous drainage of the right lung to the IVC, hypoplasia of the right lung, hypoplastic right pulmonary artery and anomalies of the right hemidiaphragm. But we recently experienced a case of typical scimitar syndrome except pulmonary venous drainage of the right lung to the IVC. This case shows drainage not to the IVC, but to the left atrium. We present this case with the review of literature.
Kang, M.O.,Joo, J.,Jun, B.H.,Choo, K.N.,Kim, C.J. 한국초전도저온공학회 2019 한국초전도저온공학회논문지 Vol.21 No.2
In this study, the effects of the compaction method for (Mg+2B) powders on the apparent density and superconducting properties of $MgB_2$ bulk superconductor were investigated. The raw powders used in this study were nano-sized boron (B) and spherical magnesium (Mg). A batch of a powder mixture of (Mg+2B) was put in a steel mold and uniaxially pressed at 1 ton or 3 tons into pellets. Another batch of the powder mixture was uniaxially pressed at 1 ton and then pressed isostatically at $1800kg/cm^2$ in the water chamber. All pellets were heat-treated at $650^{\circ}C$ for 1 h in flowing argon gas for the formation of $MgB_2$. The apparent density of powder compacts pressed at 3 ton was higher than that at 1 ton. The cold isostatic pressing (CIP) in a water chamber allowed further increase of the apparent density of powder compacts, which influenced the pellet density of the final products ($MgB_2$). The compaction methods (uniaxial pressing and CIP) did not affect the formation of $MgB_2$ and superconducting critical temperature ($T_c$) of $MgB_2$, but affected the critical current density ($J_c$) of $MgB_2$ significantly. The sample with the high apparent density showed high $J_c$ at 5 K and 20 K at applied magnetic fields (0-5 T).
M. O. Kang,J. Joo,전병혁,K. N. Choo,C.-J. Kim 한국초전도.저온공학회 2019 한국초전도저온공학회논문지 Vol.21 No.2
In this study, the effects of the compaction method for (Mg +2B) powders on the apparent density and superconducting properties of MgB2 bulk superconductor were investigated. The raw powders used in this study were nano-sized boron (B) and spherical magnesium (Mg). A batch of a powder mixture of (Mg+2B) was put in a steel mold and uniaxially pressed at 1 ton or 3 tons into pellets. Another batch of the powder mixture was uniaxially pressed at 1 ton and then pressed isostatically at 1800 kg/cm2 in the water chamber. All pellets were heat-treated at 650℃ for 1 h in flowing argon gas for the formation of MgB2. The apparent density of powder compacts pressed at 3 ton was higher than that at 1 ton. The cold isostatic pressing (CIP) in a water chamber allowed further increase of the apparent density of powder compacts, which influenced the pellet density of the final products (MgB2). The compaction methods (uniaxial pressing and CIP) did not affect the formation of MgB2 and superconducting critical temperature (Tc) of MgB2, but affected the critical current density (Jc) of MgB2 significantly. The sample with the high apparent density showed high Jc at 5 K and 20 K at applied magnetic fields (0-5 T).
Control Methods in Data-Storage Systems
Cherubini, G.,Chung Choo Chung,Messner, W. C.,Moheimani, S. O. R. IEEE 2012 IEEE transactions on control systems technology Vol.20 No.2
<P>The recording performance of data-storage devices, in which write/read elements move relative to a storage medium to reliably store and retrieve information, depends on the capability of servo mechanisms to provide the necessary positioning accuracy. The desired characteristics of servo mechanisms for data-storage systems include robustness against variations of environmental parameters, high resolution, accuracy, stability, and fast response. This paper presents a comprehensive overview of advanced servo-control methods for data storage. The applications are to well-established recording technologies, including magnetic tape and magnetic disk systems as well as CD/DVD/Blue-Ray optical data-storage systems. Moreover, newer holographic and near-field optical systems and the emerging probe-storage technology are also addressed. Emphasis is given to the potential exhibited by the technologies considered for achieving ultra-high storage capacity, as required by the exploding demand in data-storage capacity for archival systems and massive multimedia data storage.</P>