Preserving the aromatic profile of aged Toma Piemontese Protected Designation of Origin cheese with gaseous ozone technology: A quality assessment via solid phase microextraction-gas chromatography-mass spectrometry/electronic nose.

The efficacy of low gaseous ozone concentrations-300 and 400 ppb (0.642 mg/m and 0.856 mg/m, respectively)-in controlling spoilage microflora and preserving the quality of the aged Toma Piemontese Protected Designation of Origin (PDO) cheese was explored.

The Use of Ozone Technology: An Eco-Friendly Method for the Sanitization of the Dairy Supply Chain.

The dairy field has considerable economic relevance in the agri-food system, but also has the need to develop new 'green' supply chain actions to ensure that sustainable products are in line with consumer requirements. In recent years, the dairy farming industry has generally improved in terms of equipment and product performance, but innovation must be linked to traditional product specifications. During cheese ripening, the storage areas and the direct contact of the cheese with the wood must be carefully managed because the proliferation of contaminating microorganisms, parasites, and insects increases significantly and product quality quickly declines, notably from a sensory level.

Effects of gaseous ozone treatment on the mite pest control and qualitative properties during ripening storage of pecorino cheese.

Background: Ripened cheeses, such as pecorino, are susceptible to mites and molds contamination on the crust area that must be removed before the product can be marketed. This study investigates the effectiveness of gaseous ozone treatment in the control of microbiological and mite growth without negatively affecting product quality.

Results: Cheese samples were treated with gaseous ozone at 200 and 300 ppb for 8 h per day (overnight) for 150 days in storage rooms under controlled conditions (12 °C and 85% relative humidity).

Impact of the MAI and beat noise on the performance of OCDM/WDM Optical Packet Switches using Gold codes.

Recent advances in optical devices greatly enhance the feasibility of Optical Code Division Multiplexing/Wavelength Division Multiplexing (OCDM/WDM) Optical Packet Switch. In this paper, the performance of an OCDM/WDM switch is investigated when impairment due to both Multiple Access Interference and Beat noise are taken into account. Analytical models are proposed to dimension the switch resources as the number of optical codes carried on each wavelength and the number of needed optical converters.

Performance evaluation of optical packet switches equipped with heterogeneous wavelength converters.

An optical packet switch that shares both limited range and full range wavelength converters for contention resolution is proposed with the aim to guarantee a high conversion cost saving. To optimally dimension the number and the conversion range of the wavelength converters, an analytical model, validated by simulation, is introduced. Numerical results show that the proposed switch architecture allows for a conversion cost saving in the order of 90% with respect to a traditional architecture in which only shared full range wavelength converters are used.