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Diamond-like carbon 및 titanium nitride 박막의 혈액적합성 연구
윤주영, 배진우, 박기동, 구현철, 박형달, 정광화, Yun. Ju-Young, Bae. Jin-Woo, Park. Ki-Dong, Goo. Hyun-Chul, Park. Hyung-Dal, Chung. Kwang-Wha 한국진공학회 韓國眞空學會誌 6 Pages
한국진공학회 韓國眞空學會誌 2005, Vol.14 No.3 165-170 (6 pages)
증대하고 있다. 특히 diamond-like carbon(DLC)과 titanium nitride(TiN) 박막은 우수한 화학, 물리적 성질은 물론 생체적합 특성까지 갖추고 있다. 따라서 이들 박막의 혈액 적합성과 물리적 특성과의 관개를 연구하기 위하여 박막표면의 모폴로지 및 젖음성과 fibrinogen흡착 특성을 비교 분석하였다. 혈액응고 원인이 되는 fibrinogen의 흡착량은 DLC보다 TiN의 경우가 적어, 보다 우수한 특성을 보였으며, 이것은 TiN박막 표면의 높은 친수성으로 인한 것으로 판단된다. 박막표면의 fibrinogen 흡착을 줄이기 위해 플라즈마 처리 및... -
TDMAT와 TDMAT/$NH_3$ 로 형성한 MOCVD(Metal Organic Chemical Vapor Deposition) Titanium Nitride 박막의 특성
백수현, 김장수, 박상욱, 원석준, 장영학, 오재응, 이현덕, 이상인, 최진석, Baek. Su-Hyeon, Kim. Jang-Su, Park. Sang-Uk, Won. Seok-Jun, Jang. Yeong-Hak, O. Jae-Eung, Lee. Hye 한국재료학회 한국재료학회지 6 Pages
한국재료학회 한국재료학회지 1995, Vol.5 No.7 775-780 (6 pages)
MOCVD(Metal-Organic Chemical Vapor Dposition) TiN 박막을 다양한 온도와 압력에서 tetrakis-dimethyl-amino-titanium(TDMAT (Ti[N($CH_3$)$_2$]$_4$))의 자체 열분해와 NH$_3$와의 반응을 사용하여 형성하였다. 비저항은 박막내의 불순물 함량에 의존하였는데 특히 XPS curve fitting 결과 주요 불순물인 탄소와 산소 같은 불순물들이 박막내에서 다양한 침입형화합물을 만들어 박막의 물리적, 전기적 특성에 영향을 준다는 것을 알았다. Metal-organic source만을 사용하여 TiN을 형성할 경우 지름이 0.5$mu extrm{m}$이고 aspect... -
Thermal Decomposition of Tetrakis(ethylmethylamido) Titanium for Chemical Vapor Deposition of Titanium Nitride
Kim. Seong-Jae, Kim. Bo-Hye, Woo. Hee-Gweon, Kim. Su-Kyung, Kim. Do-Heyoung 대한화학회 Bulletin of the Korean Chemical Society 5 Pages
대한화학회 Bulletin of the Korean Chemical Society 2006, Vol.27 No.2 219-223 (5 pages)
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The advantage of topographic prominence-adopted filter for the detection of short-latency spikes of retinal ganglion cells
JungryulAhn, Myoung-HwanChoi, KwangsooKim, SolomonS.Senok, Dong-ilDanCho, Kyo-inKoo, YongsookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2017, Vol.21 No.5 10 555-563 (9 pages)
Electrical stimulation through retinal prosthesis elicits both short and long-latency retinal ganglion cell (RGC) spikes. Because the short-latency RGC spike is usually obscured by electrical stimulus artifact, it is very important to isolate spike from stimulus artifact. Previously, we showed that topographic prominence (TP) discriminator based algorithm is valid and useful for artifact subtraction. In this study, we compared the performance of forward backward (FB) filter only vs. TP-adopted... -
Effect of Stimulus Waveform of Biphasic Current Pulse on Retinal Ganglion Cell Responses in Retinal Degeneration (rd1) mice
KunNoAhn, JeongYeolAhn, Jae-hyungKim, KyoungrokCho, Kyo-inKoo, SolomonS.Senok, YongSookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 9 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2015, Vol.19 No.2 12 167-175 (9 pages)
A retinal prosthesis is being developed for the restoration of vision in patients with retinitis pigmentosa (RP) and age-related macular degeneration (AMD). Determining optimal electrical stimulation parameters for the prosthesis is one of the most important elements for the development of a viable retinal prosthesis. Here, we investigated the effects of different charge-balanced biphasic pulses with regard to their effectiveness in evoking retinal ganglion cell (RGC) responses. Retinal... -
Electrophysiological and Histologic Evaluation of the Time Course of Retinal Degeneration in the rd10 Mouse Model of Retinitis Pigmentosa
SeolAJae, KunNoAhn, JiYoungKim, JeHoonSeo, HyongKyuKim, YongSookGoo 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 7 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2013, Vol.17 No.3 8 229-235 (7 pages)
Among several animal models of retinitis pigmentosa (RP), the more recently developed rd10 mouse with later onset and slower rate of retinal degeneration than rd1 mouse is a more suitable model for testing therapeutic modalities. We therefore investigated the time course of retinal degeneration in rd10 mice before adopting this model in our interventional studies. Electroretinogram (ERG) recordings were carried out in postnatal weeks (PW) 3∼5 rd10 (n=23) and wild-type (wt) mice (n=26). We... -
Spontaneous Oscillatory Rhythm in Retinal Activities of Two Retinal Degeneration (rd1 and rd10) Mice
YongSookGoo, KunNoAhn, YeongJunSong, SuHeokAhn, SeungKeeHan, SangBaekRyu, KyungHwanKim 대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 8 Pages
대한생리학회-대한약리학회 The Korean Journal of Physiology & Pharmacology 2011, Vol.15 No.6 13 415-422 (8 pages)
Previously, we reported that besides retinal ganglion cell (RGC) spike, there is ∼10 Hz oscillatory rhythmic activity in local field potential (LFP) in retinal degeneration model, rd1 mice. The more recently identified rd10 mice have a later onset and slower rate of photoreceptor degeneration than the rd1 mice, providing more therapeutic potential. In this study, before adapting rd10 mice as a new animal model for our electrical stimulation study, we investigated electrical characteristics of...
