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김규영,정환교,Stott, F . H . 대한금속재료학회(대한금속학회) 2001 대한금속·재료학회지 Vol.39 No.6
The oxidation behavior of the iron aluminides and the alloy of the same kind containing zirconium in air at 1200℃ has been examined. The oxide formed on the zirconium free Fe₃Al is highly convoluted and consists of equiaxed grains. On the other hand, with addition of zirconium to the Fe₃A1, distinct changes occur in the oxide morphology. The oxide is less convoluted and consists of columnar grains. The main factor responsible for this change is the facts that addition of zirconium into the external oxide suppresses the diffusion of aluminum within the external oxide. Other secondary advantages resulting from the addition of zirconium in the Fe₃Al is the strengthening of the Fe₃Al. Convolution of oxide can be aided by a weak substrate and weaker alloys would be expected to have more convoluted scales upon exposure to an oxidizing environment at sufficiently high temperature.
남해 대륙붕 홀로세 퇴적물의 유기지화학적 특성과 고해양학적 의미
공기수,한현철,김성필,김지훈,Kong, Gee-Soo,Han, Hyun-Chul,Kim, Seong-Pil,Kim, Ji-Hun,Stott, Lowell 대한자원환경지질학회 2009 자원환경지질 Vol.42 No.2
섬진강부근 남해 대륙붕에서 획득한 시추퇴적물에서 유기지화학적(TC, TN, TS, $CaCO_3$, TOC, C/N, $\delta^{13}C$) 그리고 열분해(HI, OI, Tmax) 분석을 통하여 유기물 성분의 공간적 변화와 유기물 기원의 시간적 변화를 조사하였다. 섬진강 하구에 인접한 코아 SJ03에서 TC, TN, TS 값은 비교적 낮고 일정한 값을 보인다. 그러나, 내대륙붕 중앙 지역에서 획득한 코아 SJ02와 SJ04에서 이들 값은 다소 증가하며 그 변화 폭도 커진다. 내대륙붕 외곽경계에서 획득한 코아 SJ01과 SJ05에서 이들 값은 가장 큰 폭의 변화를 보인다. 내대륙붕 외곽경계에서 획득한 코아 SJ01에 나타난 유기물의 수직적 특성은 이 지역이 9.0 kyr B.P경 뚜렷한 환경변화를 겪었음을 지시한다. 이 시기에 TC, TOC, TN, $CaCO_3$, $\delta^{13}C$, HI, Tmax는 급격히 증가한 반면, C/N과 OI는 감소한다. 비록 퇴적물내 유기물의 함량은 높지 않으나, 이러한 변화는 9.01 cyr B.P이전 섬진강의 영향으로 퇴적물내 육상기원의 유기물이 우세하다가 9.0 kyr B.P이후 대마 난류 유입으로 해양기원의 유기물이 우세하게 되었음을 지시한다. Spacial variation in organic components and temporal variation in the origin was examined through the organic geochemical (TC, TN, TS, $CaCO_3$, TOC, C/N, and $\delta^{13}C$) and pyrolysis analysis (HI, OI, and Tmax) in the core sediments which were acquired in the continental shelf of the South Sea close to Seomjin River. Levels of TC, TN, and TS show relatively low and constant in the core SJ03 located close to the Seomjin River mouth, while those are increased a little with being varied with low amplitude in the core SJ02 and SJ04 acquired at the middle of inner shelf area. They fluctuated with high amplitude in the core SJ01 and SJ05 near to the outer boundary of inner shelf. The vertical characteristics of organic components in the core SJ01 acquired at the outer boundary show that the area has undergone distinctly the environmental change at 9.0 kyr B.P. After 9.0 kyr B.P., Levels of TC, TOC, TN, $CaCO_3$, $\delta^{13}C$, HI, and Tmax are rapidly increased, while C/N and or are significantly decreased. Even though the contents of organic components are not high, such a changes reflect that the terrigenous organic matters were predominant before 9.0 kyr B.P due to the influence of Seomjin River, but after then, the marine organic matters have dominated due to the inflow of the Tshusima current.
Park, Myoung-Hwan,Reá,tegui, Eduardo,Li, Wei,Tessier, Shannon N.,Wong, Keith H. K.,Jensen, Anne E.,Thapar, Vishal,Ting, David,Toner, Mehmet,Stott, Shannon L.,Hammond, Paula T. American Chemical Society 2017 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.139 No.7
<P>The detection of rare circulating tumor cells (CTCs) in the blood of cancer patients has the potential to be a powerful and noninvasive method for examining metastasis, evaluating prognosis, assessing tumor sensitivity to drugs, and monitoring therapeutic outcomes. In this study, we have developed an efficient strategy to isolate CTCs from the blood of breast cancer patients using a microfluidic immune-affinity approach. Additionally, to gain further access to these rare cells for downstream characterization, our strategy allows for easy detachment of the captured CTCs from the substrate without compromising cell viability or the ability to employ next generation RNA sequencing for the identification of specific breast cancer genes. To achieve this, a chemical ligand-exchange reaction was engineered to release cells attached to a gold nanoparticle coating bound to the surface of a herringbone microfluidic chip (NP-(CTC)-C-HB-Chip). Compared to the use of the unmodified (CTC)-C-HB-Chip, our approach provides several advantages, including enhanced capture efficiency and recovery of isolated CTCs.</P>