Objective(s): This paper describes synthesisPolyvinyl Alcohol/CaF2:Er nanofibers because of  its  photoluminescence properties.Materials and Methods:  First, CaF2:Er nanocomposite synthesized with co-precipitation method. In order to prepare polyvinyl alcohol (PVA)/CaF2:Er nanofibers, CaF2:Er nanocomposites were added to the polyvinyl alcohol (PVA) polymer. PVA/CaF2:Er composite nanofibers were...

Background: During last decades, many otologists attempted to make a long standing dry ear, resulting in better hearing after cholesteatoma surgery. This study evaluated the prognosis of two common methods of cholesteatoma ear surgery considering ten years follow-up. Methods: This retrospective analysis was done using medical records of 108 adult patients with cholesteatoma. After ten years of ...

Dear Editor, I was greatly interested in the article "Surgery in cholesteatoma: Ten years Follow-up" by Dr. M. Ajalloueyan published in your journal in March 2006; Vol 31, No 1: 37-40.I think there are grave misconceptions and many doubts about this article. That article has some misleading data that should be clarified by the author. The descriptions of table 1, "Statistical characteristics of...

OBJECTIVE To propose national recommendations for the initial assessment of a mass in the neck in children. METHODS Comprehensive review of the available literature and consensus discussion with national experts in the field. RESULTS Consensus guidelines are proposed concerning the work up of children presenting with a mass in the neck.

This paper summarises the main outcomes of theMobile Resource Guarantees (MRG) project, a three year project funded by the EC under the FET proactive initiative on Global Computing, and discusses follow-up work in new projects that will build on these results.

A new reaction of 4-arylidene-3-methylisoxazol-5(4H)-one or 4-arylidene-2-phenyloxazol-5(4H)-one with 2,6-diaminopyrimidin-4(3H)-one is described and a number of new pyrido[2,3-d]pyrimidine-4,7-dione derivatives are synthesized. This protocol has the advantages of good yields, broad substrate scope and simple work-up.