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Biomedical subjects

S Iwata

Publications and source records attributed to S Iwata.

535 records · Page 30Linked to original sources
PubMedDate not supplied

A safe and simple method to maintain a clear field of vision during laparoscopic cholecystectomy.

A clear field of vision during laparoscopic cholecystectomy was attained by using a newly designed retractor which elevates the abdominal wall and does not require high-pressure CO2 infusion into the peritoneal cavity. As the abdominal cavity is continuously ventilated, smoke from the cauterization is suctioned off through openings in the middle part of the retractor. There is no interference with placement of ports.

Cholecystectomy↗
PubMedDate not supplied

Graph-theoretical analysis of tunneling electron transfer in large polycyclic aromatic hydrocarbon networks.

Effect of a single nitrogen atom substitution to a number of large polycyclic aromatic hydrocarbon (PAH) molecules was calculated systematically, and it was found that especially in parallelogram-type PAH abnormal electron transfer (called tunneling electron transfer, TET) was observed. That is, fairly large amount of pi-electron is withdrawn to an electronegative nitrogen atom from almost the farthest end of a conjugated aromatic hydrocarbon molecule, leaving almost no change in the interior of the molecule. This change can be simulated by the Kekulé structure counting for subgraphs of the parent molecule.

Journal Article↗