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강창호,구자룡,조규섭,허태련,소재성 한국생물공학회 2014 KSBB Journal Vol.27 No.2
Gang-Hwa Getbul eel is a well known well-beingfood in the Korean food industry. In this study it was undertakento analyze crude compositions, minerals, and vitaminsof Gang-Hwa Getbul eel. As a result of initial analysis, theranges of moisture, crude protein, crude fat, and crude ashwere 56.6±0.0, 17.3±0.4, 14.4±2.9, and 1.2±0.1%, respectively. Regarding mineral compositions, the concentrationranges of Ca, Fe, Mg, P, K and Na were 413.8±91.1, 0.8±0.1,29.5±7.8, 361.9±118.4, 116.4±43.3, and 131.8±42.4 mg/100 g,respectively. Finally vitamin A was found being present at2571.3±194.6 I.U/100 g.
Rice Small C2-Domain Proteins Are Phosphorylated by Calcium-Dependent Protein Kinase
강창호,김차영,문병철,박형철,구성철,지용훈,정용화,윤병대,이상열 한국분자세포생물학회 2013 Molecules and cells Vol.35 No.5
We previously reported that OsERG1 and OsERG3 en-code rice small C2-domain proteins with different bio-chemical properties in Ca2+- and phospholipid-binding assays. OsERG1 exhibited Ca2+-dependent phospholipid binding, which was not observed with OsERG3. In the present study, we show that both OsERG1 and OsERG3 proteins exhibit oligomerization properties as determined by native polyacrylamide gel electrophoresis (PAGE) and glutar-aldehyde cross-linking experiments. Furthermore, in vitro phosphorylation assays reveal the phosphorylation of OsERG1 and OsERG3 by a rice calcium-dependent protein kinase, OsCDPK5. Our mutation analysis on putative se-rine phosphorylation sites shows that the first serine (Ser) at position 41 of OsERG1 may be an essential residue for phosphorylation by OsCDPK5. Mutation of Ser41 to alanine (OsERG1S41A) and aspartate (OsERG1S41D) abo-lishes the ability of OsERG1 to bind phospholipids regar-dless of the presence or absence of Ca2+ ions. In addition, unlike the OsERG1 wild-type form, the mutant OsERG1 (S41A)::smGFP construct lost the ability to translocate from the cytosol to the plasma membrane in response to calcium ions or fungal elicitor. These results indicate that Ser41 may be essential for the function of OsERG1.
소프트웨어 기반 GPS 수신기의 신호 획득 알고리즘 성능 분석
강창호,김선영,양정환,박찬국 제어로봇시스템학회 2011 제어로봇시스템학회 국내학술대회 논문집 Vol.2011 No.5
In Software-Defined GPS Receiver (SDR), GPS signal acquisition is a significant algorithm to identify the visible satellites. It also finds the code phase and Doppler frequency. After acquisition, the acquired code phase and Doppler frequency are transferred to a tracking loop as initial values to demodulate the navigation data. Acquisition time and detectable signal strength are depending on the performance of acquisition algorithm. In this paper, traditional GPS signal acquisition algorithms are analyzed and compared with the proposed GPS signal acquisition algorithm based on the combination of both coherent and noncoherent approaches. The proposed algorithm is verified by simulations. The results show that the proposed GPS signal acquisition algorithm gives about two times faster acquisition time than the conventional algorithm. In addition, the improved algorithm is more effective in the acquisition of weak signals.