Abstract: The substrate specificity of a lipolytic enzyme can be modified by making alterations to the amino acid sequence in a defined region of the lipolytic enzyme, so as to increase the level of a desired activity or to decrease the level of an undesired activity. Thus, the inventors have developed lipolytic enzyme variants with a modified amino acid sequence with a substrate specificity which can be tailored for specific uses.

Abstract: The conversion of vibration induced rotation into translational motion is effected by engaging two threaded bodies with a gap between them and vibrating one of the bodies to induce rolling contact rotation between the threads of the bodies relative to each other and generating a net translational motion of the other body along the axis of the threads of the translating body.

Abstract: The conversion of vibration induced rotation into translational motion is effected by engaging two threaded bodies with a gap between them and vibrating one of the bodies to induce rolling contact rotation between the threads of the bodies relative to each other and generating a net translational motion of the other body along the axis of the threads of the translating body.

Abstract: The invention relates to optical elements based on helical liquid-crystalline substances, having reflection bands of linear-polarized light, and to a process for preparing the same. The optical elements of this invention contain only one optically effective component based on helical liquid-crystalline substances. They reflect light incident perpendicular to the surface in a linear-polarized manner parallel to the direction of incidence of the incident light. The process for preparing the optical elements comprises illuminating a helical liquid-crystalline substance which contains at least one photoisomerizable substance with linear-polarized light in such a manner that this substance is subsequently aligned so that it exhibits at least one reflection band of linear-polarized light on illumination. Suitable helical liquid-crystalline substances are in particular organopolysiloxanes. The optical elements are suitable, for example, for data storage.