• 수산해양기술연구
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• 제38권4호
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• pp.284-288
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• 2002

향어, Cyprinus carpio [Linnaeus]의 체장에 따른 심전도를 구명하기 위하여, 어체내에 전극을 삽입하여 3가지 체장 범위 (10~15, 15~20, 20~25cm)에서의 심전도를 주간과 야간으로 구분하여, 16~18$^{\circ}C$ 수온에서 30분간 조사한 심박수와 생체전위를 마취상태와 안정상태로 구분비교 분석한 결과는 다음과 같다. 1 체장이 10~15 cm인 경우, 마비상태 (0~9분)에서의 평균심박수는 주간에 43.4 beat/min, 야간에 45.9 beat/min였고, 평균생체전위는 주간에 4.38 $\mu\textrm{V}$, 야간에 3.64 $\mu\textrm{V}$로 나타났으며, 안정상태 (9~30분)에서의 평균심박수는 주간에 69.4 beat/min, 야간에 67.4 beat/min였고, 평균생체전위는 주간에 3.82 $\mu\textrm{V}$, 야간에 3.50 $\mu\textrm{V}$로 나타났다. 2 체장이 15~20cm인 경우, 마비상태 (0~5분)에서의 평균심박수는 주간에 42.2 beat/min, 야간에 45.4 beat/min였고, 평균생체전위는 주간에 4.13 $\mu\textrm{V}$, 야간에 3.95 $\mu\textrm{V}$로 나타났으며, 안정상태(5~30분)에서의 평균심박수는 주간에 67.6 beat/min, 야간에 65.3 beat/min였고, 평균생체전위는 주간에 4.58 $\mu\textrm{V}$, 야간에 4.61 $\mu\textrm{V}$로 나타났다. 3. 체장이 20~25 cm인 경우, 마비상태(0~4분)에서의 평균심박수는 주간에 47.5 beat/min, 야간에 47.5 beat/min였고, 평균생체전위는 주간에 4.81 $\mu\textrm{V}$, 야간에 4.20 $\mu\textrm{V}$로 나타났으며, 안정상태(4~30분)에서의 평균심박수는 주간에 67.5 beat/min, 야간에 64.8 beat/min였고, 평균생체전위는 주간에 5.31 $\mu\textrm{V}$, 야간에 4.90 $\mu\textrm{V}$로 나타났다.

• 한국식품위생안전성학회지
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• 제11권2호
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• pp.123-127
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• 1996

The isolation and chemical characterization of yellow food pigments from Monascus purpureus were studied according to the compositions of media. Monacus yellow pigments were isolated and purified by solvent fractionation, silicagel column chromatography, TLC and HPLC. The retention time of Monascus yellow pigments isolated by HPLC was respectively 5 min(I) and 9 min(II) as the yeast malt extract agar(YMA) media and was respectively 4.6 min(III), 5 min(I) 5.7 min(IV), 8.3 min(V), 9 min(II) and 10.7 min(Ⅵ) at the malt extract agar(MEA) media. The structure of monascin(I), ankaflavin(II), 6,11-dihydrorubropunctatin(III), 6,11-dihydromonascorubrin(V) and unknown compounds(IV,Ⅵ) was elucidated by EI-Mass, H and C NMR, UV-visible spectrometer. Therefore, it was suggested that 6,11-dihydrorubropunctatin(III) and 6,11-dihydromonascorubrin(V) are new intermediates of Monascus yellow pigments.

• 한국물환경학회지
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• 제30권5호
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• pp.486-490
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• 2014

Industrial use of microwave heating as an alternative to conventional heating is becoming popular mainly due to dramatic reductions in reaction time. Therefore, this work experimentally determined the effect of microwave irradiation on ammonia nitrogen removal in wastewater. The effects of air flow rate (0.3~0.9 L/min), treatment temperature ($70{\sim}100^{\circ}C$), and initial pH (9~11) were characterized. As the air flow rate increased from 0.3 to 0.9 L/min, the ammonia removal rate constant (k) increased from -0.6642 to $-1.0755min^{-1}$. As the temperature increased from 70 to $100^{\circ}C$, k increased -0.0338 to $-1.0755min^{-1}$. As the pH increased from 9 to 11, k increased -0.2443 to $-1.0755min^{-1}$. Ammonia removal was strongly dependent on temperature and pH rather than air flow rate. The results show that microwave irradiation is effective in ammonia nitrogen removal in wastewater due to advantages of fast and effective processing.

• 한국정보처리학회논문지
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• 제5권5호
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• pp.1162-1171
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• 1998

본 논문에서는 relaxed min-max heap을 병합시키기 위하여 새로운 자료구조인 개선된 relaxed min-max-pair 힙을 제시함과 동시에, 두개의 relaxed min-max 힙, 즉 크기가 n인 relaxed min-max nheap과 크기가 k인 relaxed min-max kheap으로 구성된 우선 순위 큐를 병합시키기 위한 병렬 알고리즘을 제시하고자 한다. 본 논문에서는 [9]의 방법으로부터 relaxed min-max 힙을 병합 시키기 위해서 이용된 blossomed tree와 lazying 방법을 제거하여도 병합되는 새로운 방법을 제시하였다. 결과적으로 본 논문에 제시된 방법은 max($2^{i-1}$,[(m+1/4)])개의 프로세서를 이용할 경우, 시간 복잡도가 O(log(log(n/k))${\times}$log(k))임을 볼 수가 있다. 그리고 크기가 서로 다른 두 개의 relaxed min-max heap으로 구성된 8백만개의 데이터를 병합시키기 위해서, MasPar 머쉰에서 64개의 프로세서를 이용하여 실행시킨 결과 35.205의 Speedup을 얻었다.

• 한국수정란이식학회지
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• 제9권1호
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• pp.111-116
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• 1994

This study was carried out to investigate the aggregation rate of isolated mouse 2-, 4- and 8-cell stage blastomeres in phytohemagglutinin(PHA) solution. The morphologically normal embryos were collected from the oviduct of superovulated female mouse by flushing with M2 and the zona pellucida of embryos were removed with 0.5% pronase. The blastomeres were isolated by pipetting after plunging into Ca++-Mg++free PBS for 20 min. The result showed that aggregation rate in 0.5% (84.9~93.1%) was higher than that in 1.0% PHA(76.0~82.1%). Optimal aggregation time was 60min (83.9~100.0%) when compared with 30min (78.8~87.5%). Developmental to blastocyst in recombinated blastomeres was higher under conditions of 0.5% PHA solution and 60-min aggregation than that under other conditions.

• 생명과학회지
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• 제10권2호
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• pp.202-209
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• 2000

The factors affecting chemical composition of green tea (Camellia sinensis L.) during extraction process were temperatures and times. The optimum extraction conditions were measured in relation to the changes of chemical compositions from water extracts of green tea (Camellia sinensis L.) under different extraction temperatures (50, 70, 9$0^{\circ}C$) and extraction times (1, 3, 5 minute). The change of color intensity during browning reaction, flavonoid components, contents of total phenols and hydrogen donating activity (reducing activity for $\alpha$, $\alpha$'-diphenyl-$\beta$ -picryhydrazyl) of water extracts form green tea increased as extraction temperatures increased from 50 to 9$0^{\circ}C$ and extraction times prolonged from 1 to 5 min. The contents of important free sugars such as sucrose and glucose slightly increased as the extraction time was prolonged, while little difference in the content of fructose with the prolonged extraction time. Catechins contents extracted from the commercial steamed green tea were increased at higher temperature and longer extraction time. Epigallocatechin (EGC) extracted from 9$0^{\circ}C$ (extraction time 5 min). presented 99.9 mg/g in highest composition of catechin followed by epigallocatechin gallate (EGCg), epicatechin (EC), epicatechin gallate (ECg). The content of vitamin C extracted from green tea was increased about 2 times as the extraction temperature increased from 50 to 9$0^{\circ}C$ and as the extraction time increased from 1 to 5 min. with exception at 9$0^{\circ}C$(extraction time:5 min) which showed less vitamin C content than 7$0^{\circ}C$(extraction time : 3 min) probably due to possible destruction of vitamin C by high temperature.

• 융합신호처리학회논문지
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• 제23권2호
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• pp.97-106
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• 2022

본 연구에서 세포를 분별하기 위해 H&E 염색이 필요하다. 그러나 직접 염색하면 많은 비용과 시간이 필요하다. H&E 염색되지 않은 세포의 Phase image에서 H&E 염색이 된 세포의 Amplitude image로 변환 하는 것이 목적이다. FPM으로 촬영한 Image data를 가지고 Matlab을 이용해 매개변수를 변경해 Phase image와 Amplitude image를 만들었다. 정규화를 통해 육안으로 식별이 가능한 이미지를 얻었다. GAN 알고리즘을 이용해 Phase image를 기반으로 Real Amplitude image와 비슷한 Fake Amplitude image를 만들고 Fake Amplitude image를 가지고 MASK R-CNN을 이용하여 세포를 분별하여 객체화를 통해 구분했다. 연구 결과 D loss의 max는 3.3e-1, min은 6.8e-2, G loss max는 6.9e-2, min은 2.9e-2, A loss는 max 5.8e-1, min은 1.2e-1, Mask R-CNN max는 1.9e0, min은 3.2e-1이다.

• 출판저널
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• 통권296호
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• pp.9-9
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• 2001

• 디지털콘텐츠
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• 9호통권148호
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• pp.8-9
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• 2005

• 자연과 농업
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• 제27권9호통권222호
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• pp.6-9
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• 2006