Publications by authors named "N Toshida"
Article Synopsis
- The study examined how sodium 3,6,9,12,15-pentaoxa-heptacosanoate (AEC4-Na) behaves in water as concentration increases, using various scientific techniques.
- It was found that vesicles form before micelles at concentrations below the critical micelle concentration (cmc), with a transition occurring just above the cmc.
- The findings suggest that AEC4-Na vesicles are thermodynamically stable due to a unique mixed surfactant system and the structure's ability to prevent close aggregation of molecules.
Purpose: This study assessed the feasibility of modification of atrioventricular (AV) conduction under direct vision with a new ablation system using laser energy.
Methods And Results: In 23 anesthetized dogs, a combined laser and balloon-tipped endoscope was introduced into the right atrium after right thoracotomy. Koch's triangle was easily identified in all dogs endoscopically.
With aldehydes as a CO source under solvent-free conditions, rhodium complex efficiently catalyzed an intramolecular carbonylative alkene-alkyne coupling (Pauson-Khand-type reaction) and various bicyclic enones were obtained in high yield. Experiments under argon flow and a 13C-labeling experiment suggested that almost no free carbon monoxide was generated in this reaction. When noncationic rhodium complex with chiral phosphine was used as a chiral catalyst, the reaction proceeded enantioselectively to give various chiral cyclopentenones in up to 90% ee under solvent-free conditions.
View Article and Find Full Text PDF[reaction: see text]. Rhodium complex-catalyzed carbonylative alkene-alkyne coupling proceeds using aldehydes as a CO source. Cinnamaldehyde is the best CO donor, and various cyclopentenones were provided in high isolated yields by a solvent-free system.
View Article and Find Full Text PDFIntroduction: A single ventricular echo beat frequently is induced in the dog heart by ventricular pacing, but it has not been investigated using a concomitant ablative technique. We studied the effects of ablating the anterior atrial input to the AV node on ventricular echo beats induced in the dog heart to evaluate their electrophysiologic characteristics, the anatomic reentrant circuit, and the retrograde AV nodal exits.
Methods And Results: In 20 dogs, an epicardial radiofrequency current was applied to the right anterior septum in an attempt to ablate the anterior input to the AV node.