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Kim, Hyo Song,Koom, Woong Sub,Baek, Song-Ee,Kim, Hyoung-Il,Jung, Minkyu,Beom, Seung-Hoon,Kang, Beodeul,Kim, Hyunki,Chang, Jee Suk,Choi, Yoon Young,Son, Taeil,Cheong, Jae-Ho,Noh, Sung Hoon,Kim, Eun Hye Elsevier Science Publishers 2019 Radiotherapy and oncology Vol.140 No.-
<P><B>Abstract</B></P> <P><B>Background and purpose</B></P> <P>To evaluate the safety and efficacy of preoperative chemotherapy (CTx) followed by chemoradiotherapy (CCRT) for high-risk gastric cancer (GC).</P> <P><B>Methods and materials</B></P> <P>The inclusion criteria were as follows: (1) Borrmann type 4; (2) large Borrmann type 3 (≥8 cm); (3) single bulky (≥3 cm × 1) or multiple lymph nodes (≥1.5 cm × 3). Patients received two 21-day courses of induction CTx of TS-1 (35 mg/m<SUP>2</SUP>, p.o, twice daily on days 1–14), docetaxel (30 mg/m<SUP>2</SUP>, i.v., days 1 and 8), and cisplatin (30 mg/m<SUP>2</SUP>, i.v., days 1 and 8) followed by CCRT (two courses of TS-1 and cisplatin in combination with 45 Gy radiation).</P> <P><B>Results</B></P> <P>Forty-two patients were enrolled between March 2014 and February 2016, and 39 of these completed sequential CTx and CCRT. Among the 33 patients who underwent R0 resection, the pathologic response rate was 39.4% [no residual carcinoma (<I>n</I> = 5, 15.2%), with 1–10% residual carcinoma (<I>n</I> = 8, 24.2%)]. Overall, 4 patients (12.1%) were pathologic stage 0, 7 (21.2%) were stage I, 10 (30.3%) were stage II, and 12 (36.4%) were stage III. The overall survival rate at 3 years was 77.9% for stages 0 and I, 66.8% for stages II–III, and 33.3% for unresectable cases (<I>P</I> = 0.001). Toxicity was mild to moderate with grade 4 neutropenia (<I>n</I> = 1) and neutropenic fever (<I>n</I> = 1) as the most prominent side-effects.</P> <P><B>Conclusions</B></P> <P>Sequential CTx and CCRT prior to surgery are feasible and effective for high-risk GC.</P> <P>Trial registration number: NCT02495493.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A complex preoperative staging was adopted for high-risk GC. </LI> <LI> We adopted an intensive, weekly-split, triplet regimen with favorable toxicities. </LI> <LI> Induction chemotherapy and chemoradiotherapy indicate a promising outcome. </LI> </UL> </P>
Selective emitter using a screen printed etch barrier in crystalline silicon solar cell
Song, Kyuwan,Kim, Bonggi,Lee, Hoongjoo,Lee, Youn-Jung,Park, Cheolmin,Balaji, Nagarajan,Ju, Minkyu,Choi, Jaewoo,Yi, Junsin Springer 2012 NANOSCALE RESEARCH LETTERS Vol.7 No.1
<P>The low level doping of a selective emitter by etch back is an easy and low cost process to obtain a better blue response from a solar cell. This work suggests that the contact resistance of the selective emitter can be controlled by wet etching with the commercial acid barrier paste that is commonly applied in screen printing. Wet etching conditions such as acid barrier curing time, etchant concentration, and etching time have been optimized for the process, which is controllable as well as fast. The acid barrier formed by screen printing was etched with HF and HNO<SUB>3</SUB> (1:200) solution for 15 s, resulting in high sheet contact resistance of 90 Ω/sq. Doping concentrations of the electrode contact portion were 2 × 10<SUP>21</SUP> cm<SUP>−3</SUP> in the low sheet resistance (Rs) region and 7 × 10<SUP>19</SUP> cm<SUP>−3</SUP> in the high Rs region. Solar cells of 12.5 × 12.5 cm<SUP>2</SUP> in dimensions with a wet etch back selective emitter <I>J</I><SUB>sc</SUB> of 37 mAcm<SUP>−2</SUP>, open circuit voltage (<I>V</I><SUB>oc</SUB>) of 638.3 mV and efficiency of 18.13% were fabricated. The result showed an improvement of about 13 mV on <I>V</I><SUB>oc</SUB> compared to those of the reference solar cell fabricated with the reactive-ion etching back selective emitter and with <I>J</I><SUB>sc</SUB> of 36.90 mAcm<SUP>−2</SUP>, <I>V</I><SUB>oc</SUB> of 625.7 mV, and efficiency of 17.60%.</P>
Kim, Minkyu,Cho, Sunghun,Song, Jooyoung,Son, Suim,Jang, Jyongsik American Chemical Society 2012 ACS APPLIED MATERIALS & INTERFACES Vol.4 No.9
<P>Highly conductive silica/polyaniline (PANi) core/shell nanoparticles (NPs) were synthesized in various diameters (from 18 to 130 nm) using self-stabilized dispersion polymerization. The polymerization was carried out in an aqueous/organic liquid system at −30 °C. In this system, the organic phase plays a key role in directing para-direction oriented polymerization of the PANi on the surface of silica NPs. Because of its para-direction polymerized structure, the synthesized silica/PANi core/shell NPs exhibited enhanced electrical conductivity (25.6 S cm<SUP>–1</SUP>) compared with NPs (1.4 S cm<SUP>–1</SUP>) prepared by homogeneous polymerization. The conductivities and BET surface areas were 25.6 S cm<SUP>–1</SUP>/170 m<SUP>2</SUP> g<SUP>–1</SUP> (18 nm in diameter), 22.5 S cm<SUP>–1</SUP>/111 m<SUP>2</SUP> g<SUP>–1</SUP> (35 nm in diameter), 18.3 S cm<SUP>–1</SUP>/78 m<SUP>2</SUP> g<SUP>–1</SUP> (63 nm in diameter), and 16.4 S cm<SUP>–1</SUP>/53 m<SUP>2</SUP> g<SUP>–1</SUP> (130 nm in diameter). In this series, increased para-coupling along the polymer backbone was elucidated using several characterization techniques, including Fourier transform infrared (FTIR), X-ray diffraction (XRD), and nuclear magnetic resonance (NMR) spectroscopy. As-prepared silica/PANi core/shell NPs exhibited capacitance as high as 305 F g<SUP>–1</SUP>.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2012/aamick.2012.4.issue-9/am300979s/production/images/medium/am-2012-00979s_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am300979s'>ACS Electronic Supporting Info</A></P>