Several mesoionic compounds react with 2-tert-butylfulvene derivatives to form [ ~J C+ 2n] and [4n + 6 ~1 cycloadducts, which under the reaction conditions, undergo further fragmentation, elimination, or isomerization giving a variety of products including several condensed heterocycles which are isoelectronic with azulene.
Hakusan is the oil recovery vessel for the open sea. This ship was planned to build because of the oil spill of oil tanker Nakhodka when it sank in January 1997. We decided to load the oil recovery system "the cyclone type". However the cyclone type was difficult to collect the oil in the winter high wave and to collect the very sticky oil. Accordingly we developed the new type of the oil recovery system that was based on model-experiment. And the oil recovery vessel"Hakusan" which was loaded the most suitable oil recovery system completed in August 2002.
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