290 research outputs found
Factors affecting penicillium roquefortii (penicillium glaucum) in internally mould ripened cheeses: implications for pre-packed blue cheeses
The amount and vivid colour of blue veins of internally mould ripened cheeses are desirable quality characteristics. It is therefore important that there is a sufficient amount of veining and that it maintains its
blue appearance to be appealing to consumers therefore leading to maximised sales potential and profit for
the manufacturing company. Optimum in vitro growth mimicking the conditions typically found in prepacked
blue cheeses, and using lactose as the sole carbon source, was facilitated by a gas mixture of 5%
oxygen â0% carbon dioxide â balance nitrogen). The work undertaken in this study determined that the
factors for optimum in vitro growth of Penicillium roquefortii (strain PRB6) were: a temperature of
20 ± 1 ïżœC, pH of 6.0 ± 0.1, and a relative humidity of 70 ± 0.1%. Further in vitro studies have also shown
that the increasing âin-packâ carbon dioxide concentration not only depresses the growth of P. roquefortii but
also affects immature conidiospore pigmentation (no effect has been seen on mature conidiospore
pigmentation). The implications of this study suggest that the majority of pre-packed internally mould
ripened blue cheeses on sale in supermarkets are packaged in inappropriate materials. For some cheeses (e.g.
the Roquefort-type cheeses) this is not an issue since these are packed in a much more mature state and some
loss of veining colour is not appreciably noticeable
ELECTRON MICROSCOPIC OBSERVATION ON THE DISLOCATION CONFIGURATION CORRELATIVE WITH THE HIGH-TEMPERATURE INTERNAL-FRICTION PEAK IN 99.999 wt % SINGLE-CRYSTAL ALUMINIUM
Internal Friction Peaks Associated with the Polygonization Boundaries in Aluminium and Dilute Aluminium-Copper Alloys
Stress relaxation across the boundary in 99.999% aluminium bicrystals and the variation of relaxation strength with temperature of measurement
High temperature internal friction peak in single-crystals and bamboo-crystals of aluminium after twisting and annealing
On the physical models of the cold-work (Snoek-Köster) internal-friction peaks in BCC metals
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