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Physiologically acceptable methods for estimating milk intake in experimental animals are based on the measurement of rates of disappearance of3H2O from their body-water. This work discusses the problems involved in using methods of this type when steady-states (constant tracee inflow and outflow rates, and constant pool-size) do not exist. Theoretically(More)
A gas-phase on-fibre derivatisation method for the determination of putrescine and cadaverine by gas chromatography/mass spectrometry using trifluoroacetylacetone (TFAA) has been studied and optimised. Small amounts (2μl) of putrescine, cadaverine and TFAA standards were vaporised at high temperature in a 20cm(3) closed SPME vial. The subsequent derivatives(More)
Biogenic amines, and putrescine and cadaverine in particular, have significant importance in the area of food quality monitoring, and are also potentially important markers of infection, for cancer, diabetes, arthritis and cystic fibrosis. A thermal desorption-gas chromatograph-heated differential mobility spectrometer was constructed and the significant(More)
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