Determination of styrene content in Gorgonzola PDO cheese by headspace solid phase micro-extraction (HS-SPME) and gas-chromatography mass-spectrometry (GC-MS)     

Chiesa  L. M.  Panseri  S.  Soncin  S.  Vallone  L.  Dragoni  I. 《Veterinary research communications》2010,34(1):167-170

Control of the composition of products that are intended for use as packaging material is essential, particularly when these products come into direct contact with food. It is well known that plastics are not inert and that their residual monomers, starting substances, and additives are able to migrate into the food they contact. Among plastics, styrene is a common compound found in many plastic containers that can also be produced by the oxidation of Penicillium roqueforti used in gorgonzola Protected Denomination of Origin cheese manufacturing. Therefore, solid-phase microextraction combined with gas chromatography/mass spectrometry was applied in the present work to determine the styrene content in packaged and unpackaged gorgonzola cheese samples to understand styrene migration phenomena from plastic containers.

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Study on cortisol,cortisone and prednisolone presence in urine of Chianina cattle breed          下载免费PDF全文

L. Chiesa  S. Pavone  E. Pasquale  R. Pavlovic  S. Panseri  A. Valiani  F. Arioli  E. Manuali 《Journal of animal physiology and animal nutrition》2017,101(5):893-903

The Chianina, one of the oldest and most important cattle breeds of Italy, is now reared all over the world. The Chianina has been known and appreciated since ancient times because, from a nutritional point of view, its meat has no proper rivals. To date, studies have been performed to evaluate the genetic profile of the breed, but knowledge about the chemical profile is generally lacking. Due to the increased interest from farmers regarding breeding of the Chianina, this study proposes a preliminary evaluation of main endogenous urinary corticosteroids (cortisol and cortisone) and most commonly used synthetic one (dexamethasone). Moreover, after recent findings regarding the presence of endogenous prednisolone in the urine of more popular breeds, particular attention was given to analysis of the presence of prednisolone and prednisone, as well. For this aim, the urine samples of 12 young cows and 30 young bulls was collected at the farms and analysed using a fit‐for‐purpose LC‐MS/MS method. The preliminary results of this study show that prednisolone was found only in Chianina females (3 out of 12). Cortisol and cortisone were found at concentrations that showed a high inter‐individual variability, and that were higher in female urine compared to that of males.  相似文献   

Release of ethylbenzene and styrene from plastic cheese containers     

Chiesa LM  Soncin S  Panseri S  Cantoni C 《Veterinary research communications》2008,32(Z1):S319-S321

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