Abstract: The present invention provides pH-responsive liposomes which are capable of holding a desired substance in an acidic pH environment and releasing the desired substance in a basic pH environment. The present invention uses pH-responsive liposomes comprising, as constituent lipids thereof, a cationic amphiphilic molecule and at least one of an anionic amphiphilic molecule and a twitterionic amphiphilic molecule, wherein the liposomes, when dispersed in an aqueous medium, have a positive zeta potential in an acidic environment where the dispersion has a pH of less than 6.5 and have a negative zeta potential in a basic environment where the dispersion has a pH of 8.5 or more.

Abstract: The present invention provides pH-responsive liposomes which are capable of holding a desired substance in an acidic pH environment and releasing the desired substance in a basic pH environment. The present invention uses pH-responsive liposomes comprising, as constituent lipids thereof, a cationic amphiphilic molecule and at least one of an anionic amphiphilic molecule and a twitterionic amphiphilic molecule, wherein the liposomes, when dispersed in an aqueous medium, have a positive zeta potential in an acidic environment where the dispersion has a pH of less than 6.5 and have a negative zeta potential in a basic environment where the dispersion has a pH of 8.5 or more.

Abstract: A rotation angle detection apparatus for reducing power consumption. A magnetoresistance element generates first and second analog signals, which change cyclically and continuously each time a steering shaft is rotated by 60 degrees. A microcomputer determines the rotation angle of the steering shaft from the output value and number of cycles of the analog signals.

Abstract: A motor drive control device, comprises: a switch which operates a motor; a motor which raises and lowers a door glass; a pulse signal generating device which synchronizes with the rotation of the motor and generates a pulse signal; and a determining device which, in a case in which there is a predetermined difference between this pulse signal and a normal pulse signal which is generated by synchronizing with the rotation of said motor, determines that the pulse signal generating device is failed. Therefore, in a case in which it is determined that the pulse signal generating device is failed and the switch is operated so that the motor raises the door glass, raising of the door glass can be stopped.