Université de Neuchâtel

Data transferability between two MS-based electronic noses using processed cheeses and evaporated milk as reference materials

Pillonel, Laurent ; Bosset, Jacques-Olivier ; Tabacchi, Raphael

In: European Food Research and Technology, 2002, vol. 214, no. 2, p. 160-162

Electronic noses produce data which are difficult to transfer between identical instruments because of differences in the characteristics of "identical" instruments and because of sensor drift. The transportability of data is, however, essential for the setting up of databanks. Results of the present investigation, using processed cheeses and evaporated milk as reference materials, show that data...

Université de Neuchâtel

Geographic origin of European Emmental. Use of discriminant analysis and artificial neural network for classification purposes

Pillonel, Laurent ; Bütikofer, U. ; Schlichtherle-Cerny, H. ; Tabacchi, Raphael ; Bosset, Jacques-Olivier

In: International Dairy Journal, 2005, vol. 15, no. 6-9, p. 557-562

The goal of this work was to classify European Emmental cheeses according to their geographic origin using analytical approaches. Twenty-five analytical parameters (factors) were measured in 183 samples. Results were combined by multivariate statistical analysis. Discriminant analysis (DA) and an artificial neural network (ANN) delivered similar results when all regions and factors were included;...

Université de Neuchâtel

Geographic origin of European Emmental cheese: Characterisation and descriptive statistics

Pillonel, Laurent ; Badertscher, R. ; Casey, M. ; Meyer, J. ; Rossmann, A. ; Schlichtherle-Cerny, H. ; Tabacchi, Raphael ; Bosset, Jacques-Olivier

In: International Dairy Journal, 2005, vol. 15, no. 6-9, p. 547-556

To survey the authenticity of Emmental cheese from some of the main European countries of origin, samples of cheeses manufactured during winter (110 samples) and summer (73 samples) were collected. From a preliminary study, a series of promising analytical methods were selected and applied: total nitrogen, water soluble nitrogen (WSN), 12% TCA soluble nitrogen (TCA-SN), pH-value, volatile...

Université de Neuchâtel

Analytical development and traceability in food chemistry : examples of application to Swiss and foreign Emmental cheese = Développement analytique et traçabilité en chimie alimentaire : exemple d'application à des Emmental suisses et étrangers

Pillonel, Laurent ; Tabacchi, Raphaël (Dir.)

Thèse de doctorat : Université de Neuchâtel : 2004 ; 1766.

The current Ph.D. work is divided into four main parts. In the first one, the problematic of volatile compound preconcentration is dealt with to extend the application range of electronic noses (ENs). A review article highlights the advantages of portable equipments such as Solid Phase Micro-Extraction (SPME) and Solid Phase Dynamic Extraction (SPDE). Both showed comparable efficiencies when...