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박용준,남산,이영진,정영훈,백종후,김대준,이우영,Park, Yong-Jun,Nahm, Sahn,Lee, Young-Jin,Jeong, Young-Hun,Paik, Jong-Hoo,Kim, Dae-Joon,Lee, Woo-Young 한국전기전자재료학회 2008 전기전자재료학회논문지 Vol.21 No.7
The effects of $Nb_2O_5$ and $MnO_2$ on the positive temperature coefficient of resistivity (PTCR) behavior of lead-free $Ba_{0.99}(Bi_{1/2}Na_{1/2})_{0.01}TiO_3$ (BaBiNT) ceramics were investigated in order to fabricate a PTC thermistor available at high temperature of > $120^{\circ}C$. In particular, 0.05 mol% $Nb_2O_5$ added BaBiNT ceramic, which has significantly increased Curie temperature (Tc) of $160^{\circ}C$, showed good PTCR behavior; low resistivity at room temperature $(\rho_r)$ of $80.1{\Omega}{\cdot}cm$, a high $\rho_{max}/\rho_{min}$ ratio of $5.65{\times}10^3$ and a large resistivity temperature factor (a) of 18.5%/$^{\circ}C$. Furthermore, the improved $\rho_{max}/\rho_{min}$ of $6.48{\times}10^4$ and a of 25.4%/$^{\circ}C$ along with higher $T_c$ of $167^{\circ}C$ despite slightly increased $\rho_r$ of $569{\Omega}{\cdot}cm$, could be obtained for the BaBiNT + 0.05 mol% $Nb_2O_5$ + 0.02 wt% $MnO_2$ ceramic cooled down at a rate of $200^{\circ}C/h$.
비소세포 폐암에 대한 Cisplatinum , VP - 16 복합화학요법의 효과
김영준(Young Joon Kim),김주항(Joo Hang Kim),노재경(Jae Kyung Roh),정현철(Hyun Chul Chung),임세중(Se Jooung Rim),박용준(Yong Joon Park),장준(Joon Chang),김성규(Sung Kyu Kim),이원영(Won Young Lee),김병수(Byung Soo Kim) 대한내과학회 1989 대한내과학회지 Vol.36 No.5
N/A We initiated a phase II trial for non-small cell lung cancer (NSCLC). The therapy consisted of 2 cycles of cisplatin (80 mg/m2) and VP-16 (100 mg/m2) given every 3~4 weeks. After the initial 2 cycles of chemotherapy, the patients received radiotherapy consisting of 5,500~6,500 cGy/5.5~6.5 weeks, and then were on maintenace chemotherapy. The above trial was applied to 57 patients during the period of February 1986 to December 1987. The following results were obtained: 1) There were 3 patients (5.3%) with complete remission, 31 patients (54.4%) with partial remission, 13 patients (22.8%) with stable disease and 10 patients (17. 5%) with progressive disease. The overall response rate was 59.7% and the overall median duration of remission was 38.8 weeks (range, 10~55+weeks). 2) The overall median survival was 38 weeks (range, 13~91+weeks). A median survival of 57 weeks (range, 16~92+ weeks) for responders and 33 weeks (range, 13~55+weeks) for non-responders were achieved and there was a significant difference in duration of survival by response (p < 0.001). 3) The tumor response was significantly correlated with histology (squamous and large cell carcinoma greater than adenocarcinoma) and performance status (p<0.001, respectively), and the survival correlated with the extent of disease, performance status and histology. Combined radiotherapy achieved an increased response rate 4) The side effects were acceptable and reversible. We concluded that cisplation plus VP-16 chemotherapy is a useful regimen in the treatment of non-small cell lung cancer and a prospective randomized trial and long term follow-up is warranted.
박용준 ( Yong Joon Park ),윤선혜 ( Seon Hye Yoon ),김진영 ( Jin Young Kim ) 한국공업화학회 2017 공업화학전망 Vol.20 No.3
최근 전기자동차 등과 같이 높은 용량의 이차전지를 필요로 하는 분야가 늘어남에 따라 기존의 리튬이온 이차전지의 용량을 능가하는 차세대 이차전지에 대한 관심이 높아지고 있다. 리튬-공기 이차전지는 현재까지 알려진 이차전지 시스템 중 가장 높은 에너지 용량의 구현이 가능하기 때문에 가장 활발히 연구가 이루어지고 있는 차세대이차전지 시스템 중 하나이다. 현재까지 다양한 연구가 진행되어 급격한 성능의 개선이 이루어져 왔으나 아직 상용화 되기에는 많은 문제점을 가지고 있다. 본 기고문에서는 리튬-공기 이차전지의 원리와 현재까지의 연구 동향을 살펴보고 앞으로 해결해야 할 과제들에 대해 생각해 보는 기회를 가지고자 한다.
Methylene Blue-Tetraphenylborate 이온쌍의 흡수스펙트럼
송형수,박용준,김강진,Hyung-Soo Song,Young Joon Park,Kang-Jin Kim 대한화학회 1984 대한화학회지 Vol.28 No.6
Methylene blue(MB$^+$)와 tetraphenylborate(TPB$^-$)이 공존하는 묽은 수용액에서 MB+만의 흡수스펙트럼보다는 장파장 쪽에서 스펙트럼의 변화를 관찰하고, 이를 나타내는 화학종에 관한 연구를 흡수분광법으로 수행하였다. 소수성이 큰 이들 두 이온의 물의 구조를 덜 깨뜨리려는 힘에 의하여 이온쌍으로 되고 더 나아가 전자밀도가 높은 TPB$^-$로 부터 전자가 옮겨진 전하이동 착물이 그것일수도 있다. 그러나 MB$^+$만의 최대 흡수 파수를 기준으로 1,000cm$^{-1}$ 만큼 높고 낮은 두 흡수띠를 보였으므로 중이온쌍, (MB-TPB)$_2$가 새로운 흡수를 보이는 주된 화학종으로 생각되었다. A new absorption spectrum observed from dilute aqueous solutions of methylene blue$(MB^+)$ and tetraphenylborate(TPB$^-$) ions was investigated by spectrophotometry. The species responsible for the spectrum can be a charge-transfer complex formed between the two, univalent, and poorly hydrated ions in order to minimize the disturbance to the water structure. However, as the absorption band of MB$^+$ is split into two bands with exciton splitting of about 2,000 cm$^{-1}$, the formation of double ion-pair, (MB-TPB)$_2$ appears to be more favorable than the charge transfer complex.