Osaka Gas Company Limited

Revo International Inc.

Hirohisa Kitagawa

Keiichi Tsuto

Tsutomu Sakai

Naoya Ichimura

Nobuhiko Yamashita

Chiwa Kataoka

Kazunobu Miura

Ayato Kawashima

Masahide Nakayama

Junko Sakaki

Yutaka Ohtani

Takenori Hirano

The present invention relates to a process for preparing an alkyl ester of a fatty acid wherein a transesterification reaction is carried out between a fat or oil and an alcohol in the presence of a catalyst comprising a composite metal oxide having a perovskite structure; and a process for preparing an alkyl ester of a fatty acid wherein a transesterification reaction is carried out between a fat or oil and an alcohol in the presence of a catalyst comprising at least one member selected from the group consisting of oxides, hydroxides and carbonates of alkaline earth metals is used as the catalyst, with the alcohol made into a supercritical state or subcritical state. According to the present invention, the alkyl ester of a fatty acid which can be effectively utilized as a diesel fuel oil or the like can be prepared at high efficiency and on an industrial scale mainly from triglyceride contained in a fat or oil, especially a waste oil.

Processes for producing alkyl ester of fatty acid

The present invention provides monoclonal antibodies suitable for monitoring polycyclic aromatic hydrocarbons (PAHs) by an immunoasay, hybridoma cell lines producing said antibodies, and an immunoassay for analyzing PAHs in a sample using said monoclonal antibodies. In addition, the present invention provides PAH conjugates useful as an immunogen in preparing said antibodies and as a standard substance in a competitive assay.

Anti-PAH monoclonal antibodies and cell lines producing the same

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Kyoto, Japan

Hirohisa Kitagawa