Abstract: The present invention relates to a modified extension part (1) and sweeper body (6) for weed mowers, in which the mentioned extension part (1) is constructed as a cylindrical disc provided with through and through recesses (7) and at least two opposite to each other not through and through milled-out recesses (5, 51) to receive in a very inventive way the triangular or polygonal bushes (15) with sweeper body (6) constructed as steel cable (14), and pressed on the end a preferably triangular bush or cover (15), in which locking is done by means of a spring loaded blocking pin (10) and can be pushed in with the thumb and finger to replace the sweeper body for which a recess (16) comes free and the sweeper body can be replaced, through which in a surprising easy way and without the requirements of tools the sweeper body (6) of the extension part (1) can be replaced.

Abstract: The invention provides a sterile freeze-dried sponge, wherein at least 80% by weight of the sponge consists of collagen and oxidized regenerated cellulose in the weight ratio 60:40 to 40:60, wherein the sponge has a dry tensile strength of more than 3N and/or a wet tensile strength of more than 1 N. Preferably, the collagen has a degree of denaturation less than 20% and the sponge is substantially free of chemical cross-links.

Abstract: The invention provides a sterile freeze-dried sponge, wherein at least 80% by weight of the sponge consists of collagen and oxidized regenerated cellulose in the weight ratio 60:40 to 40:60, wherein the sponge has a dry tensile strength of more than 3N and/or a wet tensile strength of more than 1 N. Preferably, the collagen has a degree of denaturation less than 20% and the sponge is substantially free of chemical cross-links. The invention also provides methods for the manufacture of sponges according to the invention.

Abstract: The invention provides molybdenum-containing complexes prepared by reacting a carboxylic acid or metal salt thereof, an amine and a source of cationic molybdenum, wherein the ratio of the number of equivalents of acid groups to the number of moles of molybdenum (eq:mol) is in the range from 1:10 to 10:1, and the ratio of the number of equivalents of acid groups to the number of moles of amine (eq:mol) is in the range from 20:1 to 1:10; a process for their preparation; lubricating oil compositions containing them; and their use as friction-reducing additives.

Abstract: A high voltage electrode for a spark discharge device used in cooperation with an opposing roller electrode to roughen plastic sheets. The electrode is formed of a multiplicity of plates, or platelets, aligned edge to edge to form together a knife edge. Individual platelets are removable from an active position, within a holder, to an active position, on a selectable basis. Thereby, the portion of the plastic sheet to be roughened can readily be controlled.