Abstract: Provided herein are optically active stereoisomers of tricylclodecan-9-yl xanthogenate, processes of preparation, and pharmaceutical compositions thereof. Also provided are methods of their use for treating, preventing, or ameliorating one or more symptoms of a disease caused by a virus.

Abstract: The composition of the present invention is a thermoplastic elastomer composition obtained by dynamically crosslinking (A) 51-95% by weight of a thermoplastic polyester elastomer and (B) 49-5% by weight of a rubber during kneading. The composition is excellent in all of hardness, tensile strength, tensile elongation, compression set, thermal aging resistance, oil resistance and molded product appearance, and is suitably used as a material for automobile parts such as joint boot and the like.

Abstract: A thermoplastic elastomer composition comprising (A) 50-98% by weight of a thermoplastic polyester elastomer, (B) 50-2% by weight of a rubber and (C) a polyorganosiloxane in a proportion of 0.01-10 parts by weight per 100 parts of the total of the components (A) and (B). The above thermoplastic elastomer composition enables one to improve the flexibility and compression set of the thermoplastic polyester elastomer excellent mechanical properties, heat resistance and oil resistance without impairing the abrasion resistance of the thermoplastic polyester elastomer.

Abstract: An image recording apparatus capable of recording an image in different color tones and an ink sheet cassette suitable for use in such an image recording apparatus. The image recording apparatus, when used in combination with the ink sheet cassette, is capable of producing clear image in different recording color tones. The recording color tone can be changed by changing, in accordance with the color tone data, the condition of separation of the ink sheet from the recording medium.

Abstract: A driving method for a thermal head having plural heat generating elements for image recording on a recording medium comprises a step of detecting the presence of past, present and future heating signals in an area, in at least four directions around the heat generating element when the power is supplied to a heat generating element according to a heating signal and a step of controlling the supply energy to the heat generating element in response to the result of the detection, if the heating signals are present in all of the detecting area, for minimizing the supply energy to the heat generating element in comparison with a case in which the heating signals are not present in all of the detecting area.