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RISS 인기검색어
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- 저자 : Kei Sugimoto (검색결과 3 건)
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Copper complexes of the non-innocent β-diketiminate ligand containing phenol groups
Takaichi, June,Ohkubo, Kei,Sugimoto, Hideki,Nakano, Motohiro,Usa, Daisuke,Maekawa, Hiroaki,Fujieda, Nobutaka,Nishiwaki, Nagatoshi,Seki, Shu,Fukuzumi, Shunichi,Itoh, Shinobu The Royal Society of Chemistry 2013 Dalton Transactions Vol.42 No.7
<P>A new type of non-innocent β-diketiminate ligand having redox active phenol groups (<B>LH<SUB>3</SUB></B>, fully protonated form) has been developed, and the structure, physical properties and reactivity of the supported copper(<SMALL>II</SMALL>) complex [Cu<SUP>II</SUP>(<B>L<SUP>3−</SUP></B>)]<SUP>−</SUP> (<B>L<SUP>3−</SUP></B>, fully deprotonated tri-anionic form) as well as the one-electron and two-electron oxidised complexes, [Cu<SUP>II</SUP>(<B>L&z.rad;<SUP>2−</SUP></B>)] and [Cu<SUP>II</SUP>(<B>L<SUP>−</SUP></B>)]<SUP>+</SUP>, have been examined in detail. The two-electron oxidised form [Cu<SUP>II</SUP>(<B>L<SUP>−</SUP></B>)]<SUP>+</SUP> exhibited hydrogen atom abstraction ability from 1,4-cyclohexadiene (CHD), whereas the one-electron oxidised form [Cu<SUP>II</SUP>(<B>L&z.rad;<SUP>2−</SUP></B>)] was found to disproportionate into [Cu<SUP>II</SUP>(<B>L<SUP>3−</SUP></B>)]<SUP>−</SUP> and [Cu<SUP>II</SUP>(<B>L<SUP>−</SUP></B>)]<SUP>+</SUP> during the course of the reaction with CHD.</P> <P>Graphic Abstract</P><P>Structure, physicochemical properties, and reactivity of the copper(<SMALL>II</SMALL>)-phenoxyl radical complexes of the non-innocent β-diketiminate ligand containing phenol groups are reported. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c2dt32413j'> </P>
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Yuki Tanisaka,Masafumi Mizuide,Akashi Fujita,Ryuhei Jinushi,Rie Shiomi,Takahiro Shin,Kei Sugimoto,Tomoaki Tashima,Yumi Mashimo,Shomei Ryozawa 대한소화기내시경학회 2024 Clinical Endoscopy Vol.57 No.2
Background/Aims: Endoscopic ultrasound-guided tissue acquisition (EUS-TA) using Franseen needles is reportedly useful for its high diagnostic yield. This study compared the diagnostic yield and puncturing ability of EUS-TA using 22-gauge cobalt-chromium (CO-Cr) needles with those of stainless-steel Franseen needles in patients with solid pancreatic lesions. Methods: Outcomes were compared between the 22-gauge Co-Cr Franseen needle (December 2019 to November 2020; group C) and stainless-steel needle (November 2020 to May 2022; group S). Results: A total of 155 patients (group C, 75; group S, 80) were eligible. The diagnostic accuracy was 92.0% in group C and 96.3% in group S with no significant intergroup differences (p=0.32). The rate of change in the operator (from training fellows to experts) was 20.0% (15/75) in group C and 7.5% (6/80) in group S. Stainless-steel Franseen needles showed less inter-operator difference than Co-Cr needles (p=0.03). Conclusions: Both Co-Cr and stainless-steel Franseen needles showed high diagnostic ability. Stainless-steel Franseen needles are soft and flexible; therefore, the range of puncture angles can be widely adjusted, making them suitable for training fellows to complete the procedure.
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Yuki Tanisaka,Masafumi Mizuide,Akashi Fujita,Rie Shiomi,Takahiro Shin,Kei Sugimoto,Shomei Ryozawa 대한소화기내시경학회 2023 Clinical Endoscopy Vol.56 No.6
Endoscopic retrograde cholangiopancreatography (ERCP) in patients with surgically altered anatomy is technically challenging. Forexample, scope insertion, selective cannulation, and intended procedures, such as stone extraction or stent placement, can be difficult. Single-balloon enteroscopy (SBE)-assisted ERCP has been used to effectively and safely address these technical issues in clinical prac-tice. However, the small working channel limits its therapeutic potential. To address this shortcoming, a short-type SBE (short SBE)with a working length of 152 cm and a channel of 3.2 mm diameter has recently been introduced. Short SBE facilitates the use of largeraccessories to complete certain procedures, such as stone extraction or self-expandable metallic stent placement. Despite the develop-ment in the SBE endoscope, various steps have to be overcome to successfully perform such procedure. To improve success, the chal-lenging factors of each procedure must be identified. At the same time, endoscopists need to be mindful of adverse events, such as per-foration, which can arise due to adhesions specific to the surgically altered anatomy. This review discussed technical tips regardingSBE-assisted ERCP in patients with surgically altered anatomy to increase success and reduce the risk of adverse events associated withERCP.
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