• Title/Summary/Keyword: K-Ras

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Early onset of colorectal cancer in a 13-year-old girl with Lynch syndrome

  • Ahn, Do Hee;Rho, Jung Hee;Tchah, Hann;Jeon, In-Sang
    • Clinical and Experimental Pediatrics
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    • v.59 no.1
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    • pp.40-42
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    • 2016
  • Lynch syndrome is the most common inherited colon cancer syndrome. Patients with Lynch syndrome develop a range of cancers including colorectal cancer (CRC) and carry a mutation on one of the mismatched repair (MMR) genes. Although CRC usually occurs after the fourth decade in patients with Lynch syndrome harboring a heterozygous MMR gene mutation, it can occur in children with Lynch syndrome who have a compound heterozygous or homozygous MMR gene mutation. We report a case of CRC in a 13-year-old patient with Lynch syndrome and congenital heart disease. This patient had a heterozygous mutation in MLH1 (an MMR gene), but no compound MMR gene defects, and a K-RAS somatic mutation in the cancer cells.

Flood Stage Analysis Using HEC-RAS Model in Large River (HEC-RAS를 이용한 대규모하천의 홍수위 분석)

  • Jeong, jae-hoon;Lee, seung-yeong;Sin, jeong-yun;Kim, byeong-chan;Lee, jong-seok
    • Proceedings of the Korea Contents Association Conference
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    • 2012.05a
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    • pp.115-116
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    • 2012
  • 본 연구는 미호천의 홍수위 안정성 검토를 위하여 HEC-HMS를 이용해 첨두홍수량을 산정하였다. HEC-RAS를 적용하여 200년빈도의 홍수량에 대해 홍수위를 검토 하였다. 홍수위 분석 결과는 대체척으로 유역의 상류구간은 안전성을 확보하였으나 병천천 합류후 하류구간의 2지점은 위험단면으로 평가 되었다.

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A study on remote monitoring & diagnosis system for tower parting facility (기계식 주차설비 원격 고장감시 및 진단 시스템 구현)

  • Lee, W.T.;Cha, J.S.;Lee, J.J.;Kim, K.H.;Kim, B.U.
    • Proceedings of the KIEE Conference
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    • 2000.07d
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    • pp.3184-3186
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    • 2000
  • This paper describes the remote monitoring & diagnosis system of tower parking facilities. This system consists of central station, monitoring equipments and parking system control panel. The central station is developed under client/server architecture, and the monitoring systems are connected to central station by LAN using RAS constructed PSTN. This system offers real-time fault detection and data acquisition of tower parking system.

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A Novel Sensing Circuit for 2T-2MTJ MRAM Applicable to High Speed Synchronous Operation

  • Jang, Eun-Jung;Lee, Jung-Hwa;Kim, Ji-hyun;Lee, Seungjun
    • JSTS:Journal of Semiconductor Technology and Science
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    • v.2 no.3
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    • pp.173-179
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    • 2002
  • We propose a novel sensing circuit for 2T-2MTJ MRAM that can be used for high speed synchronous operation. Proposed bit-line sense amplifier detects small voltage difference in bit-lines and develops it into rail-to-rail swing while maintaining small voltage difference on TMR cells. It is small enough to fit into each column that the whole data array on selected word line are activated as in DRAMs for high-speed read-out by changing column addresses only. We designed a 256Kb read-only MRAM in a $0.35\mu\textrm{m}$ logic technology to verify the new sensing scheme. Simulation result shows a 25ns RAS access time and a cycle time shorter than 10 ns.

Studies on the Processings of Sterilized Salt-Fermented Anchovy Sauces (멸치액젓의 레토르트 식품화에 관한 연구)

  • Oh, Kwang-Soo
    • Korean Journal of Food Science and Technology
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    • v.28 no.6
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    • pp.1038-1044
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    • 1996
  • The salt-fermented anchovy sauce (AS) was packed in round No. 307-1 can, and thermally processed at $121.1^{\circ}C$ to obtain Fo values of 3, 5 and 10. The changes of food components and qualifies by thermal processing of sterilized AS (RAS) were examined. The compositions of AS were as followed; pH 6.81, VBN 394.7 mg/100g, total nitrogen 2,195.5 mg%, amino-nitrogen 1,010.5 mg%, and acidity 10.5 ml. Viable cell counts of AS on 0%, 5%, 20% NaCl-medium were $2.9{\times}10^3,\;9.1{\times}10^3$ and not detected, respectively. And viable cell counts of RAS were not detected. Acidity, total nitrogen and amino nitrogen contents of AS decreased slightly with the severeness of heat treatments, whereas pH and VBN content were increased. Total free amino acid contents of raw AS and RAS were 12,802.5 mg% and $11,212.6{\sim}12,105.4\;mg%$, and major amino acids were alanine, glutamic acid, leucine, isoleucine, valine and lysine. Also contents of IMP, hypoxanthine, TMAO and TMA in AS and RAS were 42.1 mg% and $35.5{\sim}40.9\;mg%$, 103.7 mg% and $103.1{\sim}105.5\;mg%$, 78.8 mg% and $58.2{\sim}71.6\;mg%$, 55.8 mg% and $58.9{\sim}68.5\;mg%$ respectively. And a little changes were observed in whole volatile components of AS with severeness of heat treatments by GC chromatogram patterns. Judging from the chemical and sensory evaluations, the Fo 3 heat treatment sample was not inferior to raw AS, and maintained good quality for 1 year storage.

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In Situ Identification of Cyanobacteria

  • Ahn Tae-Seok;Hong Sun-Hee;Chung Hyun-Mi;Belkova Natalia L.
    • Proceedings of the Microbiological Society of Korea Conference
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    • 2001.11a
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    • pp.121-127
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    • 2001
  • Seven cyanobacteria strains (Anabaena macrospora NIERl0016, Oscillatoria sp. NIER10042, Microcystis aeruginosa NIER10015, M. ichtyoblabe BIER10025, BIER10040, M. novacekii NIER10029, M. wesenbergii NIER10068) were tested with four rRNA - targeted oligonucleotide probes labelled with horseradish peroxidase (HRP) and specific for cyanobacteria. Non- fluorescent detection of hybridization signal was used. The hybridization with artificial mixture of cyanobacteria have shown the possibility to use 2 species-specific probes in duplicate hybridization and detection with different colored substrates.

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Farnesyl protein transferase 방해제 연구를 통한 항암제의 개발

  • 이상규;박세연;백영진;최희정;양철학
    • Proceedings of the Korean Society of Applied Pharmacology
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    • 1994.04a
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    • pp.180-180
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    • 1994
  • Farnesyl protein transferase는 Ras precursor의 C-terminal에 있는 cystein residue에 farnesyl group을 결합시키는 효소다. 이 효소를 bovine testis에서 30-50% ammonium sulfate fractionation, DEAE-sephacel ion exchange, Sephacryl s-300 gel filtration, hexapeptide(KKCVIM) affinity chromatography를 통해 30000배로 분리하였다. 분리된 효소는 gel filtration시 약 100kDa으로, SDS-polyacrylamide 전기영동시 50kDa의 인접한 두 bands로 나타났고 이것은 $\alpha$, $\beta$ subunits으로 생각되었다. $\alpha$ subunit을 encoding하는 RAM2 유전자를 site directed mutagenesis로 145번의 histidine을 aspartate로, 140번의 aspartate를 asparagine 으로 바꾸었더니 optimal pH와 $K_{m}$ 값이 변했다. Diethyl pyrocarbonate로 histidine residues를 chemical modification시켰을때 효소의 활성이 저하되었다. 145번 histidine이 aspartate로 바뀐 돌연변이효소에서 비교적 느리게 활성이 저하되므로 145번 histidine이 이 효소의 active site에 있을것으로 추측된다.

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″High frequency and high speed microelectronics based on the $A_{3}B_{5}$- semiconductor compounds in the republics of the former USSR. Present state and prospects for future″

  • Mokerov, V.G.;Matveev, Yu.A.;Temnov, A.M.;Kitaev, M.A.
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.06a
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    • pp.457-460
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    • 1998
  • Present paper is devoted to the brief analysis of the present state and the prospects for the future of technology of the high frequency devices and high speed integrated circuits based on the $A_{3}B_{5}$ semiconductor compounds, including the $A_{3}B_{5}$-heterostructures, in the republics of the former USSR. tunneling quantum well-structures were widely used.

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Virtual maneuvering test in CFD media in presence of free surface

  • Hajivand, Ahmad;Mousavizadegan, S. Hossein
    • International Journal of Naval Architecture and Ocean Engineering
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    • v.7 no.3
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    • pp.540-558
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    • 2015
  • Maneuvering oblique towing test is simulated in a Computational Fluid Dynamic (CFD) environment to obtain the linear and nonlinear velocity dependent damping coefficients for a DTMB 5512 model ship. The simulations are carried out in freely accessible OpenFOAM library with three different solvers, rasInterFoam, LTSInterFoam and interDyMFoam, and two turbulence models, $k-{\varepsilon}$ and SST $k-{\omega}$ in presence of free surface. Turning and zig-zag maneuvers are simulated for the DTMB 5512 model ship using the calculated damping coefficients with CFD. The comparison of simulated results with the available experimental shows a very good agreement among them.