Polymerisation von Styrol in schwerem Alkohol

Alkohol in Der Ernährung

1/09 8 Alcohol forms a significant component of the diet in many countries. Nationwide studies indicate an average per capita consumption of about 10–30 gram per day or about 3–9% of the daily energy intake. In the United States, the per capita consumption of alcohol shifted from 1.3% of daily energy intake in 1965 to 4.5% of daily energy intake in 2002 (1). The efficiency with which alcohol en...

Recent developments in sonochemical polymerisation.

High intensity ultrasound has been applied to two classes of step-growth polymerisation. The ring-opening polymerisation of cyclic lactones to polyesters was accelerated under 20 kHz ultrasound but, in the case of delta-valerolactone, sonication also promoted a depolymerisation reaction so that the molecular weight fell during later stages of the reaction. Sonication was also applied to the pre...

Alkohol und Depression in der Konsultation-Liaison-Psychiatrie

The prion paradox: infection or polymerisation?

A weak but significant similarity was found between the prion protein (PrP) and some transcription factors and zinc-finger proteins. A possible interpretation of this similarity is that the PrP is a metal- (copper-) binding transcription factor and might behave like a Zn-finger protein, with the Cu2+ binding to its histidine and serine residues. Copper-binding could create intramolecular bridge...

Biocompatibility of denture base acrylic resins evaluated in culture of L929 cells. Effect of polymerisation cycle and post-polymerisation treatments.

OBJECTIVE The purpose of this study was to evaluate the effect of two post-polymerisation treatments and different cycles of polymerisation on the cytotoxicity of two denture base resins. MATERIALS AND METHODS The resins tested were Lucitone 550 and QC 20. Discs of resins were fabricated following the manufacturer's instructions. Lucitone 550 was processed by long cycle or short cycle. The re...