Effects of dextran sulphate and flufenamic acid on euglobulin fibrinolytic activity of glass-treated or heated plasma

Treatment of human citrated plasma with glass has complex effects on the fibrinolytic system. While the spontaneous euglobulin activity is only slightly affected by the glass treatment, the activity precipitated in the presence of dextran sulphate diminishes rapidly with increasing amounts of glass. With common glass a minimum is reached, and...

Pitfalls in determination of acetylcholine from brain by pyrolysis gas chromatography/mass spectrometry

Demethylation by sodium benzenethiolate has been used to analyse mixtures of isotopic variants of acetylcholine (ACh) by gas chromatography/mass spectrometry (GC/MS). The present experiments show that demethylation by pyrolysis is also suitable for the simultaneous determination of deuterium labelled variants of ACh by means of GC/MS. However,...

Bacteriophages related to ∅X174 showing a transition between two forms with different heat sensitivity and adsorption behavior

Thermal inactivation of bacteriophage _X174 and two of its mutants

The thermal inactivation of the two forms (∅* and ∅) of bacteriophage ∅X174 with different adsorption properties was investigated under various conditions of pH, ionic strength, and temperature. A reaction mechanism is proposed that is similar for both forms. At high temperatures inactivation occurs mainly as a result of protein destruction and...

The transition between two forms of bacteriophage φX17A differing in heat sensitivity and adsorption characteristics

If cells of the bacterium Escherichia coliC infected with bacteriophage φX174 are lysed artificially in the cold, the phage obtained is relatively heat resistant at temperatures around 65° and unable to adsorb to host cells at 4°. At 37° the phage particles become more thermolabile with respect to inactivation at 65° and, concomitantly, obtain...

Heat conduction through walls during fire

An expression is given for the temperature rise of a wall exposed on one side to a standard fire. It appears that calculated and experimental results agree with each other when a theoretical thermal conductivity is assumed which is a power of the thermal conductivity at room temperature. © 1961 by ASME.