• Journal of Nutrition and Health
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• 제46권4호
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• pp.324-331
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• 2013

We investigated dietary effects of green tea powder (GTP) on plasma lipids, platelet aggregation, hemolysis, plasma TBARS, and liver enzymes. Thirty one volunteer diving women living on Jeju island consumed 4 g green tea powder daily for a period of four weeks and data for the study subjects were analyzed on the basis of diagnostic criteria for blood pressure (BP)(${\geq}$ 140/90 mmHg), plasma total cholesterol (TC)(${\geq}$ 200 mg/dL), and triglyceride (TG)(${\geq}$ 150mg/dL). Subjects with high BP had significantly higher TC and TG than those with normal BP. Subjects with higher TC had higher TG, and those with higher TG had lower HDL cholesterol. Platelet aggregation in the initial slope was significantly higher in subjects with normal BP, normal TC, or normal TG than their counterparts in high BP, TC, and TG. HDL cholesterol after GTP intake increased only in subject groups with normal BP, normal TC, or normal TG, and plasma TG after GTP intake decreased only in groups with higher BP, higher TG, or higher TC. Plasma TC and TG in subjects with normal BP increased after GTP intake. GTP intake caused a decrease in the initial slope of platelet aggregation in all subject groups with little effect on maximum aggregation. Total bilirubin showed a significant increase and GOT increased in all subject groups after GTP intake. Beneficial effects of short term intake of green tea powder might differ depending on the subject conditions in terms of blood pressure, plasma lipids, and other cardiovascular conditions. However, with the hypolipidemic, antithrombotic, and antioxidant actions of its bioactive flavonoids, long term usage of GTP or brewed green tea may provide preventive effects against cardiovascular disease.

• 한국마이크로전자및패키징학회:학술대회논문집
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• 한국마이크로전자및패키징학회 2007년도 SMT/PCB 기술세미나
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• pp.37-47
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• 2007

Factor : Structure Metal pad & SMO size Board level TC test : - Large SMO size better Board level Drop test : - Large SMO size better Factor : Structure Substrate thickness Board level TC test : - Thick substrate better Board level Drop test : - Substrate thickness is not a significant factor for drop test Factor : Material Solder alloy Board level TC test : - Not so big differences over Pb-free solder and NiAu, OSP finish Board level Drop test : - Ni/Au+SAC105, CuOSP+LF35 are better Factor : Material Pad finish Board level TC test : - NiAu/NiAu is best Board livel Drop test : - CuOSP is best Factor : Material Underfill Board level TC test - Several underfills (reworkable) are passed TCG x500 cycles Board level Drop test : - Underfill lots have better performance than non-underfill lots Factor : Process Multiple reflow Board level TC test : - Multiple reflow is not a significant actor for TC test Board level Drop test : N/A Factor : Process Peak temp Board level TC test : - Higher peak temperature is worse than STD Board level Drop test : N/A Factor : Process Stack method Board level TC test : - No big difference between pre-stack and SMT stack Board level Drop test : - Flux dipping is better than paste dipping but failure rate is more faster

• 대한핵의학회지
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• 제26권1호
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• pp.140-146
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• 1992

$^{99m}Tc-Methionine$ complexes from enantiomeric and racemic methionines were prepared controlling reaction parameters such as pH and the concentration of stannous chloride. Some radiochromato-graphic systems were also examined to determine the labelling yields of $^{99m}Tc$ complexes. The best resolutions of $^{99m}Tc$ complexes were obtained at ITLC-SA developed with acetone and paper chromatography with n-butanol saturated with 0.3N HCI. In the former system, $HR-{99m}Tc$ and $^{99m}Tc-methionine$ complex remained at origin, while $^{99m}TcO_4^-$ moved with Rf value of 1.0. In latter process, $HR-^{99m}Tc$ stayed at the origin, while $^{99m}TcO_4^-\;and\;^{99m}Tc-methionine$ complexes moved with Rf value of 0.5. By combining of two chromatographic systems, the contents of three $^{99m}Tc$ species were calculated easily. $^{99m}Tc$ Labelling from enantiomeric and racemic methionines had little differences and the optimal condition was found at pH 9.00 and the molar ratio of methionine to stannous chloride of 24:1. The yields of $^{99m}Tc$ complexes from D-, L-, and DL-methionines were 87.6%, 94.1%, and 97.9%, respectively. The results indicated that methionine containing relatively hydrophobic methylthio group $(-SCH_3)$ would be labelled with $^{99m}Tc$ by stannous chloride method.

• 한국전자파학회지:전자파기술
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• 제6권2호
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• pp.45-53
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• 1995

이동통신에서 QAM변조방식은 레일리 페이딩채널의 특성으로 인해 채널의 추정 및 보상의 방법을 사용하여 페이딩에 대한 왜곡을 보정하더라도 페이덩이 심하게 타는 부분에 대해서는 연집에러가 생기게 되어 그 성능은 열악하다. 본 논문에서는 이 연집에리를 bit reversal 블럭 인터리버플 이용하여 분산시키고 컴퓨터 탐색의 방법으로 찾아낸 레일리 채널에 적합한 TCM을 이용하여 레일리 페이딩 채널에서의 3/4 16QAM TCM의 성능 을 분석하였다. 분석결과 인터리버의 효과는 $10^{-3}$의 오율에서 약 2dB, 변형된 비터비 복호기의 사용으로는 2 5 5dB 그리고 다이버시티의 사용으로는 약9dB의 이득이 있음을 얄 수 있었다. 이는 16QAM TCM이 디지틀 이 동통신에서 사용될 수 있음을 보인다.

• 대한화학회지
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• 제40권8호
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• pp.549-556
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• 1996

항생물질 tetracycline(TC)과 여러 가지 다양한 활성도를 보이는 flavonoid화합물들의 단순유도체들(13, 25, 26, 27)을 새로운 벙법으로 합성하였다, 먼저, 1,3-cyclohexanedione 유도체로부터 분자내 benzoyl group의 이동 반응을 이용하여 TC의 A, D ring이 유사한 bicyclic compound 13를 합성하였고, 0-methoxy benzaldehyde로부터 TC의 A, C ring이 유사한 bicyclic compound, 25와 chromone을 모핵으로 하는 flavonoid유도체, 26과 27을 합성하였다.

• 한국초전도ㆍ저온공학회논문지
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• 제7권4호
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• pp.32-36
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• 2005

The structure of a high-Tc superconducting power cable system is composed of these parts; (from the outer section) a liquid nitrogen cryostat, a vacuum cryostat, multi-layer high-Tc superconducting cable cores and a stabilizer and both cryostats during the stable operating period of the high-Tc superconducting power cable system are calculated by the numerical method. And the optimal conditions of the stabilizer and both cryostats, that minimize the eddy current losses, are derived from the analyzed results. The optimal results can be applied to the design and manufacture of the high-Tc superconducting power cable system.

• 디지털융복합연구
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• 제10권8호
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• pp.97-110
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• 2012

본 연구에서는 중소 벤처기업을 대상으로 기술경영능력, 기술사업화, 기술획득전략 사이의 관계를 실증적으로 규명한다. 구체적인 연구목적은 다음과 같다. 첫째, 기술경영능력이 기술사업화에 미치는 영향을 분석한다. 둘째, 기술획득전략이 기술경영능력과 기술사업화 성공 간에 조절역할을 하는지를 분석한다. 실증분석 결과 기술경영능력은 기술사업화 성공에 유의미한 정의 영향을 미치는 것으로 나타났다. 또한, 기술획득전략은 기술경영능력과 기술사업화 성공 간에 조절역할을 하는 것으로 나타났다. 이러한 연구결과는 성공적 기술사업화를 위해서 기술경영능력의 강화와 기술획득전략의 선택이 중요함을 중소 벤처기업 경영자들에게 시사하고 있다.

• 대한전자공학회논문지TC
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• 제41권11호
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• pp.33-38
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• 2004

본 논문에서는 시간분산 통신로에 주파수선택성 페이딩과 다중경로 페이딩을 극복하기 위해서, 격자부호 변조와 OFDM을 결합한, 격자부호 직교주파수분할 다중통신방식(TC-OFDM) 시스템의 성능을 분석한다. 시간분산 통신로를 대상으로 부호율 2/3인 격자부호 8DPSK- OFDM의 BER 성능을 모의실험하고 분석한다. OFDM의 여러 반송파 수에 대한 격자부호의 설계를 논의한다. 실험결과, BER 10/sup -3/에서 TC-OFDM 시스템은 부호화를 하지 않은 OFDM 시스템에 비해서 6 dB 부호이득을 얻을 수 있음을 알았다.

• 한국식품영양학회지
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• 제32권2호
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• pp.133-137
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• 2019

Curcumin is a hydrophobic polyphenol extracted from turmeric that exhibits a variety of biological functions has albeit with limited efficacy as a functional food material owing to its low absorption when administered orally. The newly developed curcumin powder formulation exhibits improved absorption rate in vivo. This study evaluates the anti-oxidant effects of $Theracurmin^{(R)}$ (TC), which is highly bio-available in curcumin powder. The antioxidant activity of TC was investigated using 2,2-diphenyl-1-picrylhydrazyl (DPPH) scavenging activity, ferrous reducing antioxidant power (FRAP) assays, NO radical, superoxide radical, $H_2O_2$ scavenging activity, and total antioxidant capacity (TAC). Additionally, we evaluated the antioxidant activity of TC in high-fat diet (HFD)-fed streptozotocin (STZ)-induced Type 2 diabetic rats. As a result of oral administration of TC for 13 weeks in type 2 diabetic rats, the group administration of 2,000 mg/kg significantly increased FRAP, superoxide dismutase (SOD), and reduced the level of glutathione (GSH) in liver tissue 1.9, 1.2, and 1.2-times, respectively. Furthermore, serum TAC levels increased by 1.3-fold after the rats were administered with a dose of 500 mg/kg. These results were consistent with the in vitro assay results. In conclusion, TC exhibited its potential as a functional food material through its antioxidant properties.

• 센서학회지
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• 제10권3호
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• pp.196-206
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• 2001

열 영상 촬영에 의한 평면형 크로멜-알루멜 다중접합 열전변환기(TC 1)의 실제 온도분포를 측정하였다. 또한 유한 요소법에 의한 3차원 ANSYS 프로그램으로 열전변환기를 컴퓨터 시뮬레이션하여 열전변환기(TC 1${\sim}$TC 6)의 입력전력에 따른 온도분포를 예측하였다. TC 1의 고온 접합부 온도와 저온 접합부 온도의 차이가 가장 작고 TC 6의 고온 접합부 온도와 저온 접합부 온도의 차이가 가장 크게 나타나기 때문에 TC 1의 전압 감응도는 가장 작은 3.09 mV/mW로 측정되었고 TC 6의 전압 감응도는 가장 큰 4.03 mV/mW으로 측정되었다.