Publications by authors named "Per Sand Rosshaug"
Article Synopsis
- Polyethylene (PE) pipes are preferred for water supply systems due to their strength and resistance to corrosion, but studies indicate that organic compounds can leach into drinking water from these pipes.
- The research involved a two-step approach: first, laboratory experiments analyzed the migration of volatile and semi-volatile organic compounds from high-density polyethylene (HDPE) pipes, revealing 133 detectable compounds, including harmful substances like flame retardants.
- The second step examined drinking water from a Copenhagen distribution system, identifying 51 compounds, of which 12 were linked to HDPE, with many detected compounds originating from rubber seals rather than the HDPE itself.
Challenge tests with eight brands of fresh ricotta showed rapid growth of Listeria monocytogenes and significant variability in physical-chemical characteristics. Thus, two cardinal parameters models were developed for the growth of L. monocytogenes in ricotta including, respectively, terms for temperature (Model 1) and temperature and pH (Model 2).
View Article and Find Full Text PDFMathematical models were developed and evaluated for growth of psychrotolerant pseudomonads in chilled milk and in cottage cheese with cultured cream dressing. The mathematical models include the effect of temperature, pH, NaCl, lactic acid and sorbic acid. A simplified cardinal parameter growth rate model was developed based on growth in broth.
View Article and Find Full Text PDFModeling the growth of Listeria monocytogenes in soft blue-white cheese.
Appl Environ Microbiol
December 2012
The aim of this study was to develop a predictive model simulating growth over time of the pathogenic bacterium Listeria monocytogenes in a soft blue-white cheese. The physicochemical properties in a matrix such as cheese are essential controlling factors influencing the growth of L. monocytogenes.
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