http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
방사성물질 측정망 현황 및 하천·호소 내 인공방사성물질 (<SUP>134</SUP>Cs, <SUP>137</SUP>Cs, <SUP>131</SUP>I) 조사
김지유(Jiyu Kim),정현지(Hyun-ji Jung),안미정(Mijeong An),홍정기(Jung-Ki Hong),강태구(Taegu Kang),강태우(Tae-Woo Kang),조윤해(Yoon-Hae Cho),한영운(Yeong-Un Han),설빛나(Bitna Seol),김완석(Wansuk Kim),김경현(Kyunghyun Kim) 한국분석과학회 2015 분석과학 Vol.28 No.6
Bum Gu Son,Min Jung Kim,Myeung Hwa Park,Kyoungsook Kim,Jiyu Kim,Se-Young Kim,이경진,Sang Hyun Choi,Ah Young Kim,박성호 대한영상의학회 2018 Korean Journal of Radiology Vol.19 No.3
Objective: To prospectively investigate the feasibility of using 2 small intravenous catheters for high-rate computed tomography (CT) contrast injection in patients lacking superficial veins capable of accommodating ≤ 20-gauge catheters. Materials and Methods: Sixty-eight consecutive eligible adults referred for dynamic liver CT were enrolled; 58 had previously undergone liver CT, including 8 that experienced extravasation. Two 22- or 24-gauge catheters were placed in all patients after 2−5 venipunctures, and 2 mL/kg of contrast agent (370 mg I/mL) was split-administered through both catheters to achieve total flow rate of 4 mL/s. Patients’ experience and examination success rate, defined as uneventful scans completed at 4 mL/s or at < 4 mL/s achieving standard image quality in all phases, were analyzed. Quantitative hepatic signal-to-noise and hepatic vascular contrast-to-noise ratios (CNRs) were compared with 30 control examinations scanned at 4 mL/s using an 18-gauge catheter. Results: One case each of extravasation and severe injection pain caused the examination to be aborted. Success rate was 88.2% (60/68; 54 patients scanned at 4 mL/s, 6 at 3.5−3.9 mL/s). Fifty-five of 58 patients (94.8%) that had past CT regarded the venipuncture as more tolerable than (n = 36) or similar to (n = 19) past experiences; 45 of 58 patients (77.6%) found contrast injection less painful than (n = 35) or similar to (n = 10) past experiences. When compared with control examinations, signal-to-noise ratio was similar in all phases (p ≥ 0.502), but the hepatic arterial CNR in arterial phase was slightly inferior (p ≤ 0.047). Conclusion: Using 2 small intravenous catheters can effectively achieve high-rate CT contrast injection in patients lacking adequate superficial veins.
Kim, Hyun Jin,Kim, Jiyu,Cho, Seung Hwan,Chang, Sukbok American Chemical Society 2011 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.133 No.41
<P>A new synthetic approach toward intermolecular oxidative C–N bond formation of arenes has been developed under transition-metal-free conditions. Complete control of chemoselectivity between aryl sp<SUP>2</SUP> and benzylic sp<SUP>3</SUP> C–H bond imidation was achieved by the choice of nitrogen sources, representatively being phthalimide and dibenzenesulfonimide, respectively.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jacsat/2011/jacsat.2011.133.issue-41/ja207296y/production/images/medium/ja-2011-07296y_0012.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/ja207296y'>ACS Electronic Supporting Info</A></P>
Kim, Jiyu,Park, Sung-Woo,Baik, Mu-Hyun,Chang, Sukbok American Chemical Society 2015 JOURNAL OF THE AMERICAN CHEMICAL SOCIETY - Vol.137 No.42
<P>A complete switch in the Cp*Ir(III)-catalyzed paths between C-H olefination and hydroarylation was found to be crucially dependent on the type of directing groups. This dichotomy in product distribution was correlated to the efficiency in attaining syn-coplanarity of olefin-inserted 7-membered iridacycles. Theoretical studies support our hypothesis that the degree of flexibility of this key intermediate modulates the beta-H elimination, which ultimately affords the observed chemoselectivity.</P>