Other

Pentel Kabushiki Kaisha

Hitoshi Wake

Tadashi Matsunaga

Kiyoshi Hishinuma

Hironori Umetsu

Mayumi Ono

Nobuyuki Murakami

Hiromichi Takahashi

Tsuruo Nakayama

Noriyuki Nakamura

Toshihiro Takimoto

Kin-ichi Ozawa

Hideo Kadoi

An electrochemical stain prevention apparatus of a submerged structure comprising a submerged structure of which at least the stain prevention surface is formed of a conductive film that does not generate chlorine even by applying a potential of 5 V vs. SCE or less, a counter electrode located so as not to contact with the submerged structure, and a power supply unit for passing a direct current through the submerged structure having the conductive film formed thereon and the counter electrode. Aquatic organisms adhered to the surface of the conductive film can effectively be controlled by applying a potential of from 0.1 to 5 V vs. SCE to the submerged structure of such a stain prevention apparatus without generating chlorine. A potential applied to the conductive film of the submerged structure can be controlled with good accuracy by disposing a reference electrode between the submerged structure and the counter electrode. As the conductive film formed on the substrate of the submerged structure, a sprayed coating film made of a metal nitride can preferably be used.

Electrochemical stain prevention apparatus of submerged structure and process for producing submerged structure used in this apparatus

A method of plant tissue culture which comprises culturing a tissue or an organ of a plant, a part of the same or cultured cells in a medium containing a culture filtrate and/or an extract of a photosynthetic procaryotic microorganism. Such a culturing method effectively proliferates the plant tissues and cultured cells, and also promotes the formation of adventive embryos, regeneration of the plant body and production of useful substances formed by that plant. Strains of cyanobacteria or photosynthetic bacteria are preferably used as the photosynthetic procaryotic microorganism.

Method of plant tissue culture

Growing community of inventors

Koshigaya, Japan

Hitoshi Wake