Abstract: The present invention provides a process for effectively racemizing an amine compound in which an asymmetric carbon is located at the .beta.-position of the amino group or more distant therefrom, which comprises reacting the amine compound with a complex of an alkali metal and a polycyclic aromatic hydrocarbon.

Abstract: An image printing system for printing a picture image comprises a host computer for sending commands and picture image data to a printing apparatus, the printing apparatus printing a picture image in response to the commands and picture image data sent from the host computer and being ready to receive image data in response to a print command from the host computer and ready to receive a command upon receipt of a designated number of image data. The host computer has a circuit for sending n number of a predetermined code as dummy data after sending the picture image data. The printing apparatus has a parallel interface for receiving the commands and picture image data sent from the host computer, a data transferring circuit for transferring received image data to a print head, the print head printing a picture image according to the image data, a circuit for ignoring image data after m number of the image data are received (n>m.gtoreq.

Abstract: In order to avoid density variation due to difference of a print dot rate in a line printer for printing an image and character, a data transfer circuit operates to convert image data inputted through a buffer memory into a plurality of serial data trains. The serial data trains are fed to corresponding shift registers of a print head. The data transfer circuit is also connected to a selecting gate circuit in the form of a demultiplexer. The demultiplexer operates to cyclicly sample the plurality of serial data trains outputted from the data transfer circuit. A counter counts a number of print dots contained in the sampled data so as to measure a print dot rate. A drive pulse width is adjusted according to the print dot rate so as to avoid variation of print density due to difference of the print dot rate.

Abstract: Disclosed is an electronic timepiece radio having an electronic timepiece circuit, a circuit for detecting a time signal and correcting the time indication of the electronic timepiece by the detected time signal.And a preset system receiving circuit can receive more than two preset broadcasting stations.And a receiving frequency in the receiving circuit can be automatically set at the frequency of a specified preset station little before a time correction by a time signal is carried out at the receiving of the time signal whereby time indication is automatically corrected every day.