Article history: Received 19 October 2007 Available online 16 April 2008 Communicated by Charles J. Colbourn

objective: isolated visual hallucinations is considered as the charles bonnet syndrome. ophtalmic or brain organic disease is a necessary or exclusionary criterion for diagnosis. in previous reports, it reported only solitary hallucination. in this report, we found multiple hallucinations. case presentation: in this article we report a 64 year-old blind man with renal failure under hemodialysis...

PLEASE NOTE: The opinions expressed in this publication do not necessarily represent an IFOAM approved position. Acknowledgements This paper reflects the experience and wealth of expertise of many people in the organic and environmental movements. I would like to thank all those who have commented on the paper and the many authors whose work this paper draws from. In particular I would like to ...

A set of N permutations of {1, 2, . . . , v} is (N, v, t)-suitable if each symbol precedes each subset of t − 1 others in at least one permutation. The central problems are to determine the smallest N for which such a set exists for given v and t, and to determine the largest v for which such a set exists for given N and t. These extremal problems were the subject of classical studies by Dushni...

A graph G = (V,E) is a threshold tolerance graph if each vertex v ∈ V can be assigned a weight wv and a tolerance tv such that two vertices x, y ∈ V are adjacent if wx +wy ≥ min(tx, ty). Currently, the most efficient recognition algorithm for threshold tolerance graphs is the algorithm of Monma, Reed, and Trotter which has an O(n) runtime. We give an O(n) algorithm for recognizing threshold tol...

We answer a question of Golumbic, Monma and Trotter by constructing proper tolerance graphs that are not unit tolerance graphs. An infinite family of graphs that are minimal in this respect is specified.

Charles Sims has asked whether or not, for a free group F , the lower central subgroup γn(F ) coincides with the normal closure in F of the set of basic commutators of weight n. In this paper, we will show that Sims’ question has a positive answer when n = 5. The longest part of the proof is showing that this is true when F has rank 3. Once this is known, the results for higher ranks follow fai...

The present study investigates the antioxidant potential of the ethyl acetate fraction of the aerial parts Eclipta alba L. Hassk (EAEA) which was widely used as hepatoprotective plant. EAEA was orally administered at doses of 50, 100 and 200 mg/kg for 7 days in male Charles Foster rats. The extent of hepatoprotective potential of E . alba was studied by assessing the biochemical para...

http://dx.doi.org/10.1016/j.ins.2014.03.083 0020-0255/ 2014 Elsevier Inc. All rights reserved. ⇑ Corresponding author. Tel.: +39 089 964255. E-mail addresses: [email protected] (I. De Falco), [email protected] (A. Della Cioppa), [email protected] (D. [email protected] (U. Scafuri), [email protected] (E. Tarantino). I. De Falco , A. Della ...