Journal
INTERNATIONAL DAIRY JOURNAL
Volume 23, Issue 2, Pages 99-104Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.idairyj.2011.10.005
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Funding
- Italian Ministry of Economy, University, Agriculture and Economic Development Research
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H, C, N, O stable isotope ratios of forage, milk and the corresponding cheese were analysed to define the isotopic characteristics of two typical mountain cheeses produced in two different terroirs with different types of vegetation. delta C-13 was shown to be mainly influenced by the presence of C4 plants in animal diet and, in the case of C3 plant-based forage it was below -23 parts per thousand varying according to the site and herbage type. delta N-15 is more related to vegetation type and confirmed to be lower than +4 parts per thousand for alpine products. The altitude of the origin area influences delta O-18 and delta H-2. The isotopic values of milk and cheese casein were not significantly different, except delta O-18, while they were both significantly different from the values of forage, except delta H-2. Using the combined stable isotope ratios a good discrimination level between the products from two different types of pasture at two mountain sites was achieved. (C) 2011 Elsevier Ltd. All rights reserved.
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