Agency of Industrial Science and Technology

Ministry of International Trade & Industry

Masako Sakuragi

Kunihiro Ichimura

Takashi Tamaki

Yasuzo Suzuki

Takahiro Seki

Koso Aoki

Akira Hosoki

A photorecording element is disclosed which consists of a transparent substrate, a molecular layer of an organic compound with an ability to change structure reversibly by virtue of light and disposed in direct contact with the transparent substrate, and a layer of liquid crystals disposed in direct contact with the molecular layer. A liquid crystal cell comprising the photorecording element is also disclosed. A modification having fine deformations on the surface of the transparent substrate and a modification having a dichroic dye contained in the layer of liquid crystals are embraced by the present invention.

Photorecording element and liquid crystal cell comprising the same

A novel chelate resin is produced by causing a 2-hydroxybenzoic acid derivative to react upon a high molecular compound, i.e. a cross-linked polyethyleneimine or a cross-linked polyethyleneimine derivative, thereby linking a 2-hydroxybenzoyl group to the nitrogen atom in the imine chain of the high molecular compound. This chelate resin is capable of collecting, by adsorption and at high efficiency, such a metal as uranium dissolved in a trace amount in water.

Chelate, crosslinked polyethyleneimine resin having 2-hydroxy benzoyl

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Tsukuba, Japan

Masako Sakuragi