Abstract: A reserve-recording method and apparatus for a VCR are described which generate a voice signal to inform the user of information required to set and perform the reserve-recording. The apparatus includes a recording switching circuit to form a recording line between the apparatus and one of a plurality of external input devices, including a tuner for receiving a television broadcast. The reserve-recording method informs the user by voice and screen of information required to set a reserve-recording program, sets a reserve-recording mode, sorts the reserve-recording programs in their reserve numbers in order of the recording start time, and discriminates the reserve recording mode. A method of sorting reserve-recording programs according to recording start time is also provided.

Abstract: A process for the preparation of surface modified, multilayered, composite membranes are disclosed. This process comprises the steps of: subjecting the surface of porous polysulfone membranes to sulfonation to introduce sulfonic acid functional groups onto the surface of the membranes; and either subjecting the sulfonic acid functional groups so introduced to silylation with reactive polysiloxanes to undergo grafting the polysiloxanes on the introduced functional groups, followed by applying polysiloxanes coating along with cross-linking agent onto so treated membranes to allow to undergo cross-linking; or carrying out both the silylation step and the coating and cross-linking step simultaneously.The membranes so produced are useful in gas separation systems for oxygen enrichment of air.