We report the case of a 66-year-old man with a left anterior descending (LAD) coronary artery aneurysm. Cigarette smoking and hepatitis C virus infection were in his clinical history. Coronary angiography performed in 2002 showed a LAD aneurysm, a 50% stenosis of the right coronary artery, and a 30% stenosis of the left main artery (Figure 1, a through c). The ECG in 2002 was normal (Figure 2bi...

Abstract In this research, the novel materials based on polyamide (PA), polytetrafluoroethylene (PTFE), and olefinic oil molecules are produced as a solid lubricant in metal‐plastic sliding contacts or sacrificial elements metal–metal contacts. For these applications, high durability of compound material combined with low wear is required for long‐term use under friction mechanical loads. Earli...

Die Entwicklung hocheffizienter und selektiver Elektrokatalysatoren für die CO2-Reduktionsreaktion zur Herstellung von Chemikalien mit hohem Mehrwert wird intensiv untersucht. Wir berichten über eine Reihe CuxOyCz nanostrukturierten Elektrokatalysatoren, einem MOF auf Cu-Basis als poröses selbstopferndes Templat abgeleitet sind. Mischung der Katalysatoren Polytetrafluorethylen (PTFE) Gasdiffusi...

Thin polytetrafluoroethylene (PTFE) films are produced by deposition from a gas phase two methods: electron-enhanced vacuum (EVD) and EVD + low-temperature plasma (LTP). Structure, morphology, composition of the studied IR spectroscopy, atomic force microscopy, X-ray photoelectron spectroscopy. They close to structure bulk PTFE. The roughness films’ surface is changed with pressure LTP power va...

Heat transfer through the gas diffusion layer (GDL) is a key process in the design and operation of a PEM fuel cell. The analysis of this process requires determination of the effective thermal conductivity. This transport property differs significantly in the through-plane and in-plane directions due to the anisotropic micro-structure of the GDL. In the present study, a novel test bed that all...

Received April 2008 Accepted November 2008 INTRODUCTION Short or damaged renal vessels represent a serious challenge during kidney transplantation. The increasing risk of thrombosis, bleeding, or compromised kidney function often leads to declining the donated kidneys with damaged vessels.(1) We here describe 5 kidney transplantations in which a polytetrafluoroethylene (PTFE) vascular graft was...

Systemic-to-pulmonary artery shunts using polytetrafluoroethylene (PTFE) (modified Blalock-Taussig shunt) are being used successfully in palliation of cyanotic congenital heart diseases. Graft thrombosis is by far the most common complication of the procedure. Persistant serum leakage through PTFE graft causing perigraft seroma is a rare but devastating complication resulting in increased durat...