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Effects of dehydration on echocardiographic diastolic parameters in healthy cats
Keisuke Sugimoto,Nana Kawase,Takuma Aoki,Yoko Fujii 대한수의학회 2019 Journal of Veterinary Science Vol.20 No.3
This study aimed to assess the effects of dehydration on echocardiographic indices in healthy cats: specifically, it aimed to assess the effects of volume depletion on diastolic function. Nine experimental cats were subjected to both a dehydration and placebo protocol separated by a 21-day washout period. Echocardiography was performed at baseline and on completion of each protocol. Results were compared between the two protocols. Volume depletionwas induced by intravenous administration of furosemide. Volume depletion showed a significant association with increased interventricular septal and left ventricular free wall thickness at end-diastole, decreased left ventricular internal diameter at end-diastole, and left atrial diameter at end-systole. The peak early (E) and late (A) diastolic filling velocities, and the peak early diastolic velocities (E′) were significantly decreased by dehydration. Volume depletion did not affect peak longitudinal strain rate during early diastole, E/A, or E/E′. Volume depletion significantly affected the echocardiographic diastolic indices and conventional echocardiographic parameters in healthy cats.
Intramolecular [2+2] Photocycloaddition and Cycloreversion of Ferulic Acid Derivatives
Maeda, Hajime,Nishimura, Keisuke,Yokoyama, Akihiro,Sugimoto, Akira,Mizuno, Kazuhiko,Hosoda, Asao,Nomura, Eisaku,Taniguchi, Hisaji Korean Society of Photoscience 2015 Rapid communication in photoscience Vol.4 No.1
Intramolecular photocycloaddition of ferulic acid derivatives proceeded in high yields to give head-to-head intramolecular photodimers as three atropisomers. The photocycloaddition was sensitized by triplet sensitizers such as benzophenone, whereas photocycloreversion was promoted by 9,10-dicyanoanthracene (DCA) as an electron-transfer photocatalyst. On the other hand, intermolecular photocycloaddition afforded a head-to-tail photodimer.