(WO9402964-A1)      Bioelectric arrangement comprising a radiation sensitive biological material (I) such as e.g. Rhodopsin embedded in a lyotropic liq. crystal.    USE/ADVANTAGE -   The arrangement of (I) embedded in a lyotropic liq. crystal is esp. useful as a radiation sensor for detecting different types or intensities of radiation, or in the prodn. of solar batteries. Embedding the (I) in a lyotropic liq. crystal facilitates orientation and stabilisation of the (I) in the bioelectric arrangement, avoids the use of highly purified biological materials and provides for conversion of radiation energy into electrical energy by the (I) in such a way that the electrical signals can be recorded by attaching electrodes directly to the liq. crystal. High measurement voltages are obtd. thus allowing the use of simple measurement systems, e.g. the sensor may be connected to a conventional recording indicator.    (DE4224603-C2)      Bioelectric device comprises an assembly contg. a radiation-sensitive biological material embedded in a lyotropic liq. crystal compsn. opt. in the presence of an indicator and/or mounted between electrodes.    USE/ADVANTAGE -   The prods. facilitate the detection of radiation by electrical measurements or colour change in an indicator. The biological material is oriented and stabilised in the liq. crystal compsn..    (EP665982-A1)      Bio-electric arrangement comprising a radiation sensitive biological material (I) such as e.g. Rhodopsin embedded in a lyotropic liq. crystal.    USE/ADVANTAGE -   The arrangement of (I) embedded in a lyotropic liq. crystal is esp. useful as a radiation sensor for detecting different types or intensities of radiation, or in the prodn. of solar batteries. Embedding the (I) in a lyotropic liq. crystal facilitates orientation and stabilisation of the (I) in the bioelectric arrangement, avoids the use of highly purified biological materials and provides for conversion of radiation energy into electrical energy by the (I) in such a way that the electrical signals can be recorded by attaching electrodes directly to the liq. crystal. High measurement voltages are obtd. thus allowing the use of simple measurement systems, e.g. the sensor may be connected to a conventional recording indicator.