Pops Prevails

Carotid Endarterectomy: Which Technique Prevails?

For decades, carotid endarterectomy has been the golden standard for the management of severe carotid artery stenosis. However, several techniques have been proposed till date, and there has been a long-lasting debate concerning the proper method. Several research studies have been conducted not only evaluating the role of patch suturing versus that of primary carotid closure, but also comparin...

Vertex Pops and Popturns

This paper considers transformations of a planar polygon P according to two types of operations. A vertex pop (or a pop) reflects a vertex vi, i ∈ {1, . . . , n}, across the line through the two adjacent vertices vi−1 and vi+1 (where index arithmetic is modulo n). A popturn rotates vi in the plane by 180◦ about the midpoint of the line segment vi−1vi+1. Pops and popturns are polygon reconfigura...

Fate of POPs

Impact of the regional climate and substance properties on the fate and atmospheric long-range transport of persistent organic pollutants – examples of DDT and γ-HCH V. S. Semeena, J. Feichter, and G. Lammel Max Planck Institute for Meteorology, Centre for Marine and Atmospheric Sciences (ZMAW), Hamburg, Germany Meteorological Institute, University of Hamburg, Centre for Marine and Atmospheric ...

Persistent Organic Pollutants ("POPs")

Strictly speaking, all toxins entering the environment can be regarded as environmental poisons. Certain pollutants can, acting over long periods, harm living organisms even in low concentrations. This means that pollutants that are stable and thus persistent have a great ability to act as environmental poisons. Their stability means not only that their effects are long-lasting, but also that t...

European POPs Expert Team