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Electron Cyclotron Resonance O_2 Plasma에서 증착한 규소 산화 박막의 특성
안명환,서문석,장재선,서성모,이기방,윤창주,이형재,남기석,최규현,손춘배,김용섭,강석희 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.17 No.-
규소 산화막을 ECR-CVD(electron cyclotron resonance-chemical vapor deposition) 증착방법으로 5인치 기판위에 상온에서 증착하고, 증착공정조건인 증착율, 기판온도, 마이크로파의 세기변화 및 플라즈마 혼합기체의 비에 따른 규소 산화막의 특성을 조사하였다. 또한 산화막의 구조적인 특성을 비교하기 위해 FTIR을 이용하여 ECR-CVD 증착한 산화막, RPE-CVD(remote plasma enhanced-CVD) 증착한 산화막 및 열 산화막의 stretching frequency를 측정하였다. 측정된 결과 ECR-CVD로 증착된 산화막이 구조적인 면에서 열 산화막과 거의 같음을 보였다. ECR-CVD로 증착된 산화막의 전기적인 특성을 전류-전압 및 축전-전압 측정에의하여 분석하였다. 축전된 산화막의 전기적인 특성은 산화막의 전하 밀도는 1×10 exp (11)/㎠이였고, 평균 절연 파괴 전압은 약 6 MV/㎝이다. We have grown thin films of SiO_2 at room temperature by using an ECR-CVD system and have investigated the changes in the properties of the deposited films with changes in the processing conditions such as the deposition rate, the substrate temperature, the microwave power and the plasma gas mixing ratio. We also measured the stretching frequency of three kinds of oxides, and ECR-CVD-grown oxide, a PECVD-grown oxide, and a thermally grown oxide, using FTIR analysis to compare their structural properties. The result shows that the structural properties of the ECR-grown oxide are similar to those of the thermally grown oxide. Additionally, the electrical properties of the ECR-grown oxide were investigated by using current-voltage and capacitance-voltage measurements. These electrical results indicate that the oxide charge density and the average breakdown voltage are 1×10 exp (11) ㎝^-2 and 6 MV/㎝, respectively.
Amin, Md. Ruhul,Azad, H.M. Saifullah,Hossain, Md. Shamim,Suh, Sang Jae,Kwon, Yong Jung Institute of Agricultural Science and Technology 2014 慶北大農學誌 Vol.32 No.4
The movement, survival, and weight gain of Helicoverpa armigera $H{\ddot{u}}bner$ (Lepidoptera: Noctuidae) first instar larvae were studied on CB9, CB10 and SR05 cotton varieties under field conditions. The neonate H. armigera were released on the cotton varieties at the squaring stage of the plants and, after a period of 72 hours, the survival, weight gain, and final location of the larvae were observed. While the different cotton varieties had no effect on the survival and weight gain of the larvae, the release locations on the cotton varieties had a significant influence on the larval survival and weight gain. The larvae fed small squares of the cotton varieties were significantly heavier and showed a higher mortality than the larvae fed leaflets and mature leaves. For the cotton varieties in this study, the larvae released on leaflets showed a significantly higher rate of recovery compared to the larvae released on mature leaves and squares. This study also found that that the larvae on leaflets did not move up or downward unlike the larvae on mature leaves and squares. This information on the foraging behavior of larvae on cotton varieties will assist researchers to interpret field data and thereby help with the development of pest management decisions.
Amin, Md. Ruhul,Azad, H.M. Saifullah,Hossain, Md. Shamim,Suh, Sang Jae,Kwon, Yong Jung 경북대학교 농업생명과학대학 2014 Current Research on Agriculture and Life Sciences Vol.32 No.4
The movement, survival, and weight gain of Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) first instar larvae were studied on CB9, CB10 and SR05 cotton varieties under field conditions. The neonate H. armigera were released on the cotton varieties at the squaring stage of the plants and, after a period of 72 hours, the survival, weight gain, and final location of the larvae were observed. While the different cotton varieties had no effect on the survival and weight gain of the larvae, the release locations on the cotton varieties had a significant influence on the larval survival and weight gain. The larvae fed small squares of the cotton varieties were significantly heavier and showed a higher mortality than the larvae fed leaflets and mature leaves. For the cotton varieties in this study, the larvae released on leaflets showed a significantly higher rate of recovery compared to the larvae released on mature leaves and squares. This study also found that that the larvae on leaflets did not move up or downward unlike the larvae on mature leaves and squares. This information on the foraging behavior of larvae on cotton varieties will assist researchers to interpret field data and thereby help with the development of pest management decisions.
초전도 한류기를 적용한 계통의 3상 단락사고에 대한 EMTDC 시뮬레이션
최효상,김병숙,서용균,나도간,이남재,한병성 전북대학교 공업기술연구소 1998 工學硏究 Vol.30 No.-
We have performed an EMTDC simulation for the current limiting effects of a superconducting fault current limiter (SFCL). A three-phase fault in the 154 kV transmission line between the gaepo and Sungnam substations produced a fault current of up to 60kA. The SFCL with 100 Ω impedance after quench limited the current to 17kA within a half cycle. This limited current is well below the upper limit of a circuit breaker, suggesting the impedance of the SFCL in the transmission line is sufficient.
지연성 일산화탄소 중독 후유증 환자에서 99mTc-HMPAO 를 이용한 국소 뇌혈류량의 SPECT 소견
이명식,안재훈,서정호,김진수,이도연,김동익,박찬희,정태섭 대한핵의학회 1988 핵의학 분자영상 Vol.22 No.2
8 patients of delayed CO sequelae were evaluated using Brain CT and Tc-99m-HMPAO SPECT. The results were as follows; 1) CT findings of delayed CO sequelae were bilateral low density lesion in globus pallidus (1 pt.), diffuse low density in white matter with bilateral low density in white matter (1 pt.), diffuse low density in white matter with bilateral low density in globus pallidus (1 pt.), diffuse low density in white matter with cortical atrophy (1 pt.), bilateral low density in globus pallidus and diffuse low density in white matter with cortical atrophy (1 pt.) and normal in 3 pts. 2) Tc-99m-HMPAO Brain SPECT findings of delayed CO sequelae were decreased regiona1 cerebral b1ood flow (rCBF) in frontal (1 among 8 pts.), frontal and basal ganglia (3 among 8 pts.), and diffuse patch decreased rCBF pattern (4 among 8 pts.) 3) Tc-99m-HMPAO Brain SPECT study was well correlated with neurologic symptoms and signs in delayed CO sequelae. Our results may suggest that reduced cerebral blood flow contributes to the development of delayed CO sequelae.
Antinociceptive Effect of Smilaxin B Administered lntracerebroventricularly in the Mouse
Suh, Hong W.,Son, Dong K.,Son, Keun H.,Woo, Mi H.,Do, Jae C.,Choi, Young S.,Lee, Keun H.,Kim, Yung H. 영남대학교 약품개발연구소 1996 영남대학교 약품개발연구소 연구업적집 Vol.6 No.-
We examined the antinociceptive effect of smllaxin B administered intracerebroventricularly (i.c.v.) in ICR mice. The tail-flick test was used as an analgesic assay. Smilaxin B showed a strong antinociceptive effect in a dose-dependent manner, Sulfated cholecystokinin (CCK-8s, 0.5ng), muscimol (50ng), or MK-802 [(±)-5-methyl-10,11-dihydro-5H-dibenzoo, [a,d]cyclohep-ten-5,10-lmine maleate,1μg] injected i.c.v. significantly reduced inhibition of the tail-flick response induced by smilaxin B administered i.c.v. However, naloxone (2μg), baclofen (10ng), or CNQX (6-cyano-7-nitroquinoxaline-2,3-dione, 0.5μg) injected i.c.v. did not affect inhibition of the tail-flick response induced by smilaxin B administered i.c.v. The intrathecal (i.t) injection of yohimbine (20μg), but not methysergide (20μg) and naloxone2(2μg), slgnificantly attenuated inhibition of the tail-flick response induced by smilaxin B adminitered i.c.v. Our results suggest that GABA_(A) or NMDA receptos but not opioid, GABA_(B), and non-NMDA receptors located at the supraspinal level may play important roles in the production of antinociception induced by smilaxin B administered supraspinally. Furthermore, smilaxin B administered supraspinally may produce its antinociception by activating descending noradrenergic- but not opioidergic- and serotonergic-neurons.
Gupta, Arun,Shin, Jae H.,Lee, Min S.,Park, Ji Y.,Kim, Kyuwan,Kim, Joong H.,Suh, Minseok,Park, Cho R.,Kim, Young J.,Song, Myung G.,Jeong, Jae M.,Lee, Dong S.,Lee, Yun-Sang,Lee, Jae S. American Chemical Society 2019 Molecular pharmaceutics Vol.16 No.4
<P>Several radiolabeled folic acid conjugates have been developed for targeted imaging and therapy. However, the therapeutic concept with radiolabeled folate conjugates has not yet been applied to clinical applications owing to the high renal absorbed dose. The effectiveness of targeted radionuclide therapy (TRT) depends primarily on the absorbed dose rate and on the total absorbed dose delivered to the tumor and to normal tissue. Owing to various limitations associated with organ level dosimetry, voxel-based dosimetry has become essential for the assessment of a more accurate absorbed dose during TRT. In this study, we synthesized iron oxide nanoparticle (IONP)-conjugated radiolabeled folate (<SUP>177</SUP>Lu-IONP-Folate) and performed voxel-based dosimetry using SPECT/CT images of normal mice through direct Geant4 application for emission tomography (GATE) Monte Carlo (MC) simulation. We also prepared <SUP>177</SUP>Lu-Folate and <SUP>177</SUP>Lu-IONPs for the comparison of absorbed doses with that of <SUP>177</SUP>Lu-IONP-Folate. In addition, we calculated the mean absorbed dose at the organ-level using the medical internal radiation dose (MIRD) schema. The radioactivities of all three radiotracers were mainly accumulated in the liver and kidneys immediately after injection. For the kidneys, the voxel-based absorbed doses obtained with <SUP>177</SUP>Lu-IONP-Folate, <SUP>177</SUP>Lu-Folate, and <SUP>177</SUP>Lu-IONPs were 1.01 ± 0.17, 2.46 ± 0.50, and 0.52 ± 0.08 Gy/MBq, respectively. The renal absorbed dose decreased significantly (∼half) when <SUP>177</SUP>Lu-IONP-Folate was used compared with when the <SUP>177</SUP>Lu-Folate only was used. The mean absorbed dose values obtained at organ-level using the MIRD schema were comparable to voxel-based absorbed doses estimated with GATE MC. The voxel-based absorbed dose values obtained in this study of individualized activity show that the renal absorbed dose could be reduced to almost half with <SUP>177</SUP>Lu-IONP-Folate. Therefore, <SUP>177</SUP>Lu-IONP-Folate could be clinically applicable in the TRT of folate receptor-positive cancers in a personalized manner when using the voxel-based dosimetry method.</P> [FIG OMISSION]</BR>