Abstract: Method of preparing a molecular catalyst from a mixture comprising a (C5-C7)alkane, a spray-dried alkylaluminoxane, and a molecular procatalyst. Molecular catalysts prepared by the method may be screened.

Abstract: There is provided the use of a 5-HT2A receptor antagonist to treat or prevent thrombosis, particularly arterial thrombosis, in a human or animal patient. The patient is suitably one who is at risk of bleeding, particularly those about to undergo, or those undergoing, surgery. A preferred 5-HT2A antagonist is thromboserin.

Abstract: There is provided the use of a 5-HT2A receptor antagonist to treat or prevent thrombosis, particularly arterial thrombosis, in a human or animal patient. The patient is suitably one who is at risk of bleeding, particularly those about to undergo, or those undergoing, surgery. A preferred 5-HT2A antagonist is thromboserin.

Abstract: A digital memory structure manages a subset N of a universe U={0 . . . .M-1 } of elements e, where the universe U is represented by a complete binary tree of height m+1 with elements e of the universe U at its leaves. The digital memory structure has an array of overlapped registers reg[i], preferably where O i M/2-1, for storing internal nodes of the binary tree along respective paths from ancestors of the leaves to root. Location j of register reg[i] is arranged to store internal node k, preferably where k=(i div 2j)+2m−j−l). Any internal node of the binary tree is stored tagged, if the right and/or left subtree thereof contain(s) at least one element of subset N. The digital memory structure also has an array of pointers internal[l], preferably where 1 1 M-1, to the smallest element in the right subtree, and/or the largest element in the left subtree, of each respective ontemal node 1.