| 1. |
- Concina, Isabella, et al.
(författare)
-
Early detection of microbial contamination in processed tomatoes by electronic nose
- 2009
-
Ingår i: Food Control. - : Elsevier BV. - 0956-7135 .- 1873-7129. ; 20:10, s. 873-880
-
Tidskriftsartikel (refereegranskat)abstract
- Microbial contamination can easily affect processed tomato, thus determining both organoleptic adulterations and potential health risks for customers. Innovative techniques for a rapid and reliable diagnose of spoilage, such as electronic nose technology, are highly requested in order to guarantee food safety and to improve production. In this work canned peeled tomatoes were artificially spoiled with different kinds of microbial flora and then were analyzed by means of an electronic nose based on thin film metal oxide gas sensors. Preliminary analyses by dynamic-headspace gas chromatographic-mass spectrometry showed significant differences in the semi-quantitative volatile compounds profile of spoiled tomato samples just after few hours from contamination, thus suggesting to employ the electronic nose for an early diagnose of microbial presence. The electronic nose was indeed able to reveal contamination, even at early stages depending on the type of contaminant (e.g. for Saccharomyces cerevisiae and Escherichia coli), and to recognize spoiled tomato samples with good classification performances.
|
|
| 2. |
- Parihar, Vishal Singh, et al.
(författare)
-
Isolation and characterization of Listeria species from tropical seafoods
- 2008
-
Ingår i: Food Control. - Amsterdam : Elsevier. - 0956-7135 .- 1873-7129. ; 19:6, s. 566-569
-
Tidskriftsartikel (refereegranskat)abstract
- The incidence of Listeria species in the seafood of markets in Goa, India was studied. One hundred and fifteen raw/fresh seafoods bought at the fish markets were sampled and tested for presence of Listeria spp. using a two step enrichment procedure, followed by plating on two selective agars. The confirmation of the isolates was based on biochemical identification. Twenty eight seafood samples were positive for Listeria spp. and in 10 samples Listeria monocytogenes was detected. L.innocua was the most common Listeria species recovered and was detected in 18 samples. L. monocytogenes in raw seafood may pose a health risk in kitchen if contaminating ready-to-eat food.
|
|
| 3. |
|
|
| 4. |
- Wadsö, Lars, et al.
(författare)
-
Isothermal Calorimetry for Biological Applications in Food Science and Technology
- 2009
-
Ingår i: Food Control. - : Elsevier BV. - 0956-7135. ; 20:10, s. 956-961
-
Tidskriftsartikel (refereegranskat)abstract
- All physical, chemical and biological processes produce heat and isothermal calorimetry is a general measurement technique to study all kinds of processes by the heat they produce. This paper gives several examples of studies of biological processes in the food area using isothermal calorimetry. It is for example shown how different unit operations influence respiration of vegetable tissue, how the kinetics of a fermentation process can be studied, and how spoilage processes can be followed for shelf-life determinations.
|
|
