Arterial thromboembolism in patients receiving systemic heparin therapy

Arterial thromboembolism is a recognized complication of systemic heparin therapy and may be preceded by gastrointestinal and musculoskeletal symptoms that appear to be ischemic in origin, and might serve to warn the clinician of these complications.

Abstract

Various zeolite (NaY or CaY) supported metal sulfide (Ni or Co) catalysts were prepared (impregnation or ion exchange) and characterized by means of thiophene HDS, Xe-129 NMR and TPS. Especially the acidic zeolites showed a very high initial activity. The observed activity differences are discussed in terms of sulfidation, dispersion, position of the metalsulfide relative to the zeolite pore system and acidity, the latter two being the most important. It is concluded that small Ni and Co sulfide clusters are very efficient thiophene desulfurization catalysts