http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
패각 폐자원을 활용한 악취제거기능을 갖는 폴리에틸렌 필름
전병철,정용찬,정미화,박정환,권오철 수원대학교 기능성생명소재연구소 2003 자연과학연구논문집 Vol.2 No.1
연간 250,000 톤 정도 생산되는 패각을 이용하여 악취제거기능을 갖는 폴리에틸렌 필름을 제조하기 위해, 패각 표면의 탄산이온을 바탕으로 양이온 또는 양이온성 계면활성제의 이온교환에 의한 표면흡착 및 이에 따른 표면 극성 변화를 통해서 악취제거능을 부여하였다. 패각 표면의 개질은 양이온성 계면활성제로서 DTAB (n-dodecyltrimethylammonium bromide), CTAB (n-cetyltrimethylammonium bromide), 그리고 DHAB(n-dihexadecyldimethylammonium bromide)를 사용하였다. 또한 양이온의 금속으로는 Ce3+, Mg2+, Al3+를 이용하여 계면활성제의 이온교환방법으로 표면을 개 질하였다. 표면개질된 패각 분말을 이용하여 LDPE와 패각 기준 20 wt%의 마스터 배치 (masterbatch, MB)를 제조한 후 다시 LDPE와 섞어서 패각 기준 3, 5, 10 wt%의 폴리에틸렌필름을 제조하였다. 생산된 필름의 규격은 폭 40 cm, 두께 40 μm 이었다. 제조된 패각 필름에 대한 기계적 물성 측정 결과 패각의 첨가로 인한 기계적 물성의 큰 저하는 관찰되지 않았으며, 순수 폴리에틸렌 필름 대비 80 % 이상의 물성을 유지하였다. 악취제거능은 양이온성 계면 활성제로 개질된 패각 필름이 시험된 모든 종류의 악취에 대하여 가장 우수한 악취 흡착 제거능을 보여주었으며, 개질되지 않은 패각 필름도 비교적 우수한 악취제거능을 보여주었다.
Oh, Seung-Jae,Jung, Sung-Cherl,Kwon, Oh-Bin,Kim, Young-Sil,Kim, Mei-Ying,Kim, Sangeok,Lim, Sabina,Shin, Hyung-Cheul WHO COLLABORATING CENTRE FOR TRADITIONAL MEDICINE 2004 東西醫學硏究所 論文集 Vol.2004 No.-
Effects of hypothermia on the afferent somatosensory transmission to the ventroposteromedial (VPM) thalamus were determined in anesthetized rats and hamsters. Hamsters showed a gradual suppression of afferent sensory transmission during cooling (to 18 ℃) and disinhibition during subsequent warming of body temperaturc (Tb). However, rats exhibited steep inhibition from Tb 26 ℃ to complete absence of sensory transmission at Tb 20 ℃ and abrupt disinhibition during subsequent wanning. Species difference at thalamic level was quite similar to our previous results in the primary somatosensory (SI) cortex, suggesting that changes of sensory transmission observed in the SI cortex may have already occurred at thalamic level. Differences between the cortex and the thalamus were observed only during deep hypothermia in rat and during the final period of warming in hamstcr. Conduction latencies of thalamocortical system of both species were not influenced during Tb lowering until 24 ℃ (equivalent to brain temperature 25-26 ℃). These results suggest inherently different adaptability to hypothermia in processing somatosensory information between hibernator and non-hibernator, but similar sustainability of sensory functions of the thalamocortical system during hypothermia in both species.
Vertical Alignment of Nematic Liquid Crystal on the SiC Thin Film Layer with Ion-beam Irradiation
Oh, Yong-Cheul,Lee, Dong-Gyu The Korean Institute of Electrical and Electronic 2006 Transactions on Electrical and Electronic Material Vol.7 No.6
We studied the nematic liquid crystal (NLC) aligning capabilities using the new alignment material of the SiC (Silicon Carbide) thin film. The SiC thin film exhibits good chemical and thermal stability. The good thermal and chemical stability make SiC an attractive candidate for electronic applications. A vertical alignment of nematic liquid crystal by atomic beam exposure on the SiC thin film surface was achieved. The about $87^{\circ}$ of stable pretilt angle was achieved at the range from $30^{\circ}\;to\;45^{\circ}$ of incident angle. Consequently, the vertical alignment effect of liquid crystal electro-optical characteristic by the atomic beam alignment method on the SiC thin film layer can be achieved.
Oh, Yong-Cheul The Korean Institute of Electrical and Electronic 2006 전기전자재료학회논문지 Vol.19 No.12
We report on the fabrication of P3HT-based thin-film transistors (TFTs) for liquid crystal display that consist of $NiO_x$, poly-vinyl phenol (PVP), and Ni for the source-drain (S/D) electrodes, gate dielectric layer, and gate electrode, respectively The $NiO_x$ S/D electrodes of which the work function is well matched to that of P3HT are deposited on a P3HT channel by electron-beam evaporation of NiO powder. The maximum saturation current of our P3HT-based TFT is about $15{\mu}A$ at a gate bias of -30 V showing a high field effect mobility of $0.079cm^2/Vs$ in the dark, and the on/off current ratio of our TFT is about $10^5$. It is concluded that jointly adopting $NiO_x$ for the S/D electrodes and PVP for gate dielectric realizes a high-quality P3HT-based TFT.
Update of Adjuvant Chemotherapy for Resected Gastric Cancer
Oh, Sang-Cheul The Korean Gastric Cancer Association 2012 Journal of gastric cancer Vol.12 No.1
Gastric cancer is the second cause of cancer that is related to death and the fourth most common cancer, worldwide. Complete resection of cancer is the only curative treatment for gastric cancer. However, even if complete resection is possible, recurrence is frequently observed in Gastric patients. Therefore, adjuvant treatment modality for resectable gastric cancer is needed to increase the survival of patients. This study wants to describe the role of adjuvant chemotherapy for resectable gastric cancer, with updated data of recent studies. Several meta-analysis studies demonstrated a benefit of adjuvant chemotherapy for resectable gastric cancer. Due to the heterogeneity of the population and regimens, there is no consensus regarding the adjuvant chemotherapy. Recently published, well designed phase III studies demonstrated the statistically significance of adjuvant chemotherapy for the resectable gastric cancer, with the extended lymph node dissection. Further phase III trials, to determine the best regimen and schedule of adjuvant chemotherapy, was suggested to use the fluoropyrimidine based regimen as control group.
Oh, Yong-Cheul,Lee, Dong-Gyu The Korean Institute of Electrical and Electronic 2006 Transactions on Electrical and Electronic Material Vol.7 No.6
We have studied liquid crystal (LC) aligning capabilities for homeotropic alignment and the control of tilt angles on the $SiO_{x}$ thin film by electron beam evaporation method. A high tilt angle of about $86.5^{\circ}$ was obtained, and also the suitable tilt angle of the NLC on the $SiO_{x}$ thin film at $20{\sim}50\;nm$ thickness with e-beam evaporation can be achieved. The uniform LC alignment on the $SiO_{x}$ thin film surfaces with electron beam evaporation can be achieved. It is considerated that the LC alignment on the $SiO_{x}$ thin film by electron beam evaporation is attributed to elastic interaction between LC molecules and micro-grooves at the $SiO_{x}$ thin film surface created by evaporation.