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We prove that every tree T = (V; E) on n vertices can be embedded in the plane with distortion O(p n); that is, we construct a mapping f: V ! R 2 such that (u; v) kf(u)? f(v)k O(p n) (u; v) for every u; v 2 V , where (u; v) denotes the length of the path from u to v in T (the edges have unit lengths). The embedding is described by a simple and easily… (More)

Muscarinic receptor binding sites were identified in membranes prepared from albino rabbit ciliary processes, using the muscarinic antagonist [3H]L-quinuclidinyl benzylate as the radioligand. Analysis of saturation binding experiments demonstrated that [3H]L-quinuclidinyl benzylate bound to an apparent homogeneous population of binding sites with a Kd value… (More)

High affinity binding sites for the angiotensin II antagonist 125I-[Sar1,Ile8]-AII have been identified and characterized in membrane suspensions of ocular tissues of albino rabbits. Scatchard analysis of the binding indicated a single class of sites with Kd values of 186, 92, 152, 50, 102 pM for the iris + ciliary body, choroid, ciliary process, retina and… (More)

In this paper we study 3-dimensional visibility representations of complete graphs. The vertices are represented by equal regular polygons lying in planes parallel to the xy-plane. Two vertices are adjacent if and only if the two corresponding polygons see each other-i.e. it is possible to construct an abscissa perpendicular to the xy-plane connecting the… (More)

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