Archivio Pubblicazioni - 2005

27.10
2005

Online Detection of Microbial Contamination by an Electronic Nose. Proc. of the 1st IAASS Conference ‘Space Safety – A New Beginning

Warrelmann, J., Grafe, H., Cording, I., Nobmann, P., Lenic, J. & Bohle, D. (2005).

 

The development of bacteria and fungi in closed space cabins represents a serious safety problem. Especially in long-term missions microbial contaminations can cause infections of the crew members by contact with contaminated material. With respect to safety and operational reliability another important effect of microorganisms is a degradation or even damage of overgrown materials by biocorrosion.

The UFT researches the electronic nose technology (E-Nose) for a near real-time detection of microorganisms by their specific odour profile (see Fig. 1). In the present study - funded by the German Aerospace Center (DLR) - a portable electronic nose PEN3 (Airsense Analytics) is applied for the measuring.

Microorganisms are known to produce microbial volatile organic compounds (MVOC) which belong to different chemical classes such as alcohols, aldehydes, ketones, alkanes, terpenes, ethers, esters, carbon acids or organic sulphur compounds. By an array of chemical sensors (Metal Oxide Semiconductors – MOS) the E-Nose is able to detect these MVOC fingerprints (see Fig. 2). Thus, the identification of an unknown microorganism by this fingerprint requires a prior training of the E-Nose, which is performed by measuring bacteria and fungi relevant in long-term space missions.

The practicability of PEN3 is intended to prove in a Russian ground-based experiment that simulates a manned flight to mars (Mars-500), which will be performed in 2008 by the Institute of Biomedical Problems in Moscow. In December 2007, the Electronic Nose will be part of a technical test run at the habitat complex.

A special focus of the E-nose application in the Russian Mars-500 experiment will lie on the successful detection of microorganisms in the habitat in a very early growth stage in order to use this technology as an early-warning system for microbial contamination in long-term missions.

10.10
2005

Implementation of the electronic nose for the identification of mycotoxins in durum wheat (Triticum durum).

Tognon, G., Campagnoli, A., Pinotti, L., Dell'Orto, V., Cheli, F.  -  Department of Veterinary Sciences and Technologies for Food Safety, University of Milan, Milan, Italy.                   Veterinary Research Communications, 2005 (Vol. 29) (No. Supp. 2) 391-393                 

Abstract:
Ten T. durum wheat samples from different origins were tested for aflatoxin, ochratoxin and trichothecene concentrations using HPLC and olfactometric analysis using an electric nose (PEN2 AIRSENSE ANALYTICS) equipped with metal oxide sensors sensitive to different classes of molecules. It was shown that all the samples had low levels of aflatoxins (<0.1 mg/kg), ochratoxin A (<1 mg/kg) and trichothecenes (<0.001 mg/kg) but were contaminated by deoxynivalenol (DON). These results show that the olfactometric method is useful for the evaluation of mycotoxins in wheat and requires only a few samples for analysis.

08.10
2005

Evaluation by an electronic Nose of Olive oil oxidation during storage

J. Food Sci. (2005) 17 (2) 203-210.
S. Buratti*, S. Benedetti, M.S. Cosio
Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche,
Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy

08.10
2005

Shelf of Crescenza cheese as measured by Electronic

J. Dairy Sci. (2005) 88 3044-3051
S. Benedetti, N. Sinelli, S. Buratti, M. Riva
Department of Food Science and Technology, University of Milan, Milan, IT

08.10
2005

Analisi dell’immagine e naso elettronico

Food Packages; 2005 pag. 35-43
M. Riva, S. Benedetti, S. Mannino
Dipartimento di Scienze e Tecnologie Alimentari e Microbiologiche,
Università degli Studi di Milano, Via Celoria 2, 20133 Milano, Italy

03.10
2005

Analisi sensoriale della diffusione di odori da una porcilaia per mezzo

Atti del Convegno Annuale AIIA: “L’ingegneria Agraria per lo sviluppo sostenibile dell’area Mediterranea”. Catania, 27-30 giugno 2005
M. Brambilla, M. Guarino and P. Navarotto (2005):
Università degli Studi di Milano, Dipartimento VSA, Via Celoria 4, Milano
massimo.brambilla@unimi.it – www.vsa.unimi.it