• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2005년도 추계학술발표회
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• pp.703-704
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• 2005

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2005년도 추계학술발표회
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• pp.422-423
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• 2005

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2004년도 추계학술발표회 발표논문집
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• pp.1373-1374
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• 2004

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2005년도 춘계학술발표회
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• pp.1144-1145
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• 2005

• Archives of Pharmacal Research
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• 제19권4호
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• pp.275-279
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• 1996

To study the functional roles of dopamine receptors, we decided to raise antibodies against these proteins. To make antigen, we expressed the whole 3rd cytoplasmic loop of dopamine receptors in a fusion protein with glutathione-S-transferase (GST). $For D_2\; and\; D_3$ receptors, it was successful to express and purify fusion proteins for the whole 3rd cytoplasmic loops. However, we could not express the fusion protein for the whole 3rd cytoplasmic loop of $D_4$ dopamine receptor in the bacteria. To study the causes that prevent the bacterial expression of the GST-fusion protein of the 3rd cytoplasmic loop of $D_4$ dopamine receptor, we conducted more detailed studies on $D_4$ dopamine receptor. To locate the region which prevents bacterial expression, we made sequential constructs in the 3rd cytoplasmic loop decreasing the size step by step, and confirmed their expressions in the SDS PAGE. It was found that certain regions of 3rd cytoplasmic loop of $D_4$ dopamine receptor, located in N-terminal side of the 3rd cytoplasmic loop of $D_4$ dopamine receptor suppress the bacterial expression of fusion protein.

• 한국원자력학회:학술대회논문집
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• 한국원자력학회 2005년도 추계학술발표회
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• pp.701-702
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• 2005

• Journal of electromagnetic engineering and science
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• 제2권2호
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• pp.93-99
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• 2002

The Cartesian loop chip which is one of key devices in narrow-band Walky-Talky transmitter using RZ-SSB modulation method was designed and implemented with 0.35 Um CMOS technology. The reduced size and low cost of transmitter were available by the use of direct-conversion and Cartesian loop chip, which improved the power efficiency and linearity of transmitting path. In addition, low power operation was possible through CMOS technology. The performance test results of transmitter showed -23 dBc improvement of IMD level and -30 dEc below suppression of SSB characteristic in the operation of Cartesian loop chip (closed-loop). At that time, the transmitting power was about 37 dBm (5 W). The main parameters to improve the transmitting characteristic and to compensate the distortion in feed back loop such as DC-offset, loop gain and phase value are interfaced with notebook PC to be controlled with S/W.

• 한국ITS학회 논문지
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• 제12권2호
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• pp.30-37
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• 2013

본 논문에서는 지난 호 브랜치 루프안테나 BLA(Branch Loop Antenna)에 이어 휴대 단말기용 연장 루프안테나를 설계한다. 사각형 루프에 연장 루프를 추가한 ELA(Extended Loop Antenna)를 소개하고, 휴대 단말기에 적용될 수 있음을 보인다. 연장 루프 소자를 사각형 루프안테나 상단 및 좌우양단에 추가하고, 길이를 조절하여 낮은 공진 주파수를 얻는다. 연장 루프에 의한 다중 공진을 얻고, 접속위치와 길이로부터 원하는 대역을 얻는다. 설계한 ELA를 구현한 후 측정으로부터, CDMA/GSM의 낮은 주파수 대역에서 평균이득 -3.0~-1.46dBi 및 50.15~71.41% 효율의 양호한 특성을 얻었고, DCS/USPCS/WCDMA의 높은 주파수 대역에서는 평균이득 -8.28~-1.7dBi 및 14.87~67.68% 효율을 얻었다.

• Asian Pacific Journal of Cancer Prevention
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• 제15권21호
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• pp.9283-9289
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• 2014

Background: Acute lymphoblastic leukemia (ALL) is the most common cancer diagnosed in children and represents approximately 25% of cancer diagnoses among those younger than 15 years of age. Materials and Methods: This study investigated alterations in the displacement loop (d-loop) region of mitochondrial DNA (mtDNA) as a risk factor and diagnostic biomarker for early detection and diagnosis of acute lymphoblastic leukemia. Using mtDNA from 23 subjects diagnosed with acute lymphoblastic leukemia, the first 450 bp of the d-loop region were amplified and successfully sequenced. Results: This revealed 132 mutations at 25 positions in this region, with a mean of 6 alterations per subject. The d-loop alterations in mtDNA in subjects were all identified as single nucleotide polymorphisms in a homoplasmic distribution pattern. Mutant alleles were observed in all subjects with individual frequency rates of up to 95%. Thirteen mutant alleles in the d-loop region of mtDNA occurred with a high frequency. Novel alleles and locations were also identified in the d-loop of mtDNA as follows: 89 G insertions (40%), 95 G insertions (13%), 182 C/T substitutions (5%), 308 C insertions (19%), and 311 C insertions (80%). The findings of this study need to be replicated to be confirmed. Conclusions: Further investigation of the relationship between mutations in mitochondrial d-loop genes and incidence of acute lymphoblastic leukemia is recommended.

• 한국전자파학회논문지
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• 제11권1호
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• pp.116-123
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• 2000

본 논문에서는 Delay line이 없는 Feedforward loop를 이용한 PCS 중계기용 선형화기룹 설계 및 제작하였다. 기존의 Feedforward 방식을 이용한 Predistortor에서 사용되는 지연 선로(Delay line)를 제거하기 위하여 기존의 선호 루프(Signal loop)의 주 경로에 보조 증폭기를 사용하고 보조 경로에 보조 증폭기와 비슷한 동작시간을 갖 는 혼 변조 증폭기(Inter-modulation am미ifier)를 사용하였다 또한, 주 증폭기를 에러 루프(Error loop)로 옮기 고 그와 비슷한 농작시간을 갖고 에러 선호를 증폭하기 위해서 에러 증폭기(Error amplifier)를 사용하여 지연 선로를 제거하였고 에러 선호를 주 증폭기 출력 단에 인가시켰다, 본 논문의 선형화기는 HP사의 EEsof ADS v ver.l.l을 사용해서 설계하였으며 유전율 3.2 .. 2 두께 0.8mm인 GML 1000 기판에 제작하였다. 측정 결과, 이득 27 d dB이고 $P_{1dB}$ 29 dBm인 주 전력 증폭기에 -7 dBm/tone을 갖는 1.85 GHz와 1.851 GHz의 2-tone 신호를 인가한 결과 전체 IMD가 약 17 dB 개선되었다.