Abstract: The present invention relates to a process for the production of polyunsaturated fatty acids in an organism by introducing, into the organism, nucleic acids which encode polypeptides with ?5-elongase activity. Advantageously, these nucleic acids can be expressed in the organism together with further nucleic acids which encode polypeptides of the biosynthesis of the fatty acid or lipid metabolism. Especially advantageous are nucleic acids which encode ?6-desaturases, ?5-desaturases, ?4-desaturases and/or ?6-elongases. These desaturases and elongases are advantageously derived from Thalassiosira, Euglena or Ostreococcus. The invention furthermore relates to a process for the production of oils and/or triacylglycerides with an elevated content of long-chain polyunsaturated fatty acids, and oils and/or triacylglycerides thus obtained.

Abstract: A fastener for connecting two parts of a flexible ornamental article comprises a sleeve, which is open at both ends and provided with first bayonet joint means adjacent to each end thereof, two plugs, each of which is provided with second bayonet joint means which are contained in said sleeve and interengage with said first bayonet joint means, and a helical compression spring contained in said sleeve between said plugs and urging said plugs axially apart. Each of said plugs is rotatable in said sleeve to disengage said second bayonet joint means of said plug from the first bayonet joint means and is subsequently axially movable out of said sleeve. The fastener can be used to connect two parts of a flexible ornamental article if each of said parts is provided with one of said plugs.