Abstract: The present disclosure provides a medical grade nanofibrillar cellulose hydrogel comprising plant-based chemically and enzymatically unmodified nanofibrillar cellulose hydrogel having a concentration of the nanofibrillar cellulose in the range of 1.4-3.4% by weight, the nanofibrillar cellulose having a number-average diameter of fibrils and/or fibril bundles of 100 nm or less, and a storage modulus in the range of 1-35 Pa. The present disclosure also provides a method for treating a subject in need of treatment of body with implantable material, and a method for manufacturing medical grade nanofibrillar cellulose hydrogel.

Abstract: A micromanipulator for positioning/localization of an operating instrument coupled therewith. The micromanipulator controls movement of the operating instrument in a single- or multi-axial system of coordinates with one or more electrical actuators. The electrical actuators are especially for providing a substantially elongated structure for the micromanipulator. The one or more actuators including a piezoelectric bender enable the positioning/localization of the operating instrument for providing at least one desired direction of motion.

Abstract: The invention relates to a micromanipulator, which is intended for the positioning/localization of an operating instrument (1) coupled therewith, by controlling its movement in a single- or multi-axial system of coordinates, such as in the direction of an x-, y- and/or z-axis, by means of electrical actuators (2) present in the micromanipulator. Especially for providing a substantially elongated structure for the micromanipulator, one or more actuators (2; 2?) enabling the positioning/localization of the operating instruments (1), for providing at least one of its desired directions of motion, are implemented in the way of a piezoelectric bender (2?a).