1,720,965 research outputs found
Valutazioni sulla presenza di cromo nel latte vaccino e ovino
No full textÈ stata eseguita la ricerca del Cromo nel latte
vaccino ed ovino prodotto in Puglia, al fine
di verificare una eventuale somministrazione
volontaria di cromo, (come integratore dei
mangimi per il miglioramento delle produzioni.
I dati ottenuti hanno evidenziato in alcuni
campioni di latte sia vaccino che ovino,
concentrazioni elevate di cromo e gli AA.,
pertanto, avanzano il sospetto di una probabile
presenza di cromo nei mangimi e sui pascoli
dovuta a contaminazione ambientale ed
evidenziano da un parte la necessità di stabilire
valori limite per la presenza di cromo nei
mangimi e nei foraggi, dall'altra l'opportunità che
l'U.E. indichi il limite di assunzione di cromo con
gli alimenti, che possa ritenersi sicuro per la salute
umana
Quantitative and legislative aspects related to the presence of canthaxanthin and astaxanthin in smoked salmon fillets
No full textThe legal decree of 29/11/94 allows feed supplemented with canthaxanthin to be used for the farming of trout, salmon and chicken. This law is in contrast to legal decree n. 209 of 1996 which on the basis of directives n. 94/34/CE, n. 94/35/CE, n. 94/36/CE, n. 95/2/CE and n. 95/31/CE, concerning the use of food additives permitted in food, prohibits the treatment of smoked fish with canthaxanthin. Thirty-five packages of smoked salmon fillets were analysed by HPLC for the presence of canthaxanthin and astaxanthin to assess whether or not they conform to the Italian Legislation. Carotenoids were found in 40% of the samples, with values ranging from 0.19 to 2.92 mg/kg wet weight for canthaxanthin and 0.14 to 2.48 mg/kg wet weight for astaxanthin. The remaining 60% of the samples contained only astaxanthin with values ranging from 0.10 to 4.92 mg/kg wet weight
Identificazione del virus dell’epatite A nei mitili (Mytilus galloprovincialis) mediante RT-PCR
No full text
Determination of ochratoxin A at part-per-trillion level in Italian salami by immunoaffinity clean-up and high-performance liquid chromatography with fluorescrence detection
No full textA fast high-performance liquid chromatography method has been devised for the determination of ochratoxin A (OTA) in Italian salami in
the low part-per-trillion (pg/g) level. The samples were extracted with ethyl acetate and purified by immunoaffinity column (IAC). The IAC
eluate could be directly injected or previously concentrated 10-fold. Recovery at 0.5 and 1 ng/g was 77±4%. The between-day coefficient
of variation measured over 5 days on samples spiked at 1 ng/g was 8%. The developed method required a relatively small volume of nonhalogenated
organic solvent and the whole procedure was simpler and faster compared to other existing procedures. The limit of detection
was 0.06 ng/g that could be even lowered using a preconcentration step. A total of 30 salami samples were analysed using this procedure; the
most contaminated sample was found to have OTA concentration at 0.4 ng/g level
Quantitative and legislative aspects regarding canthaxanthin and astaxanthin in smoked salmon filet
No full textMetodo analitico per la ricerca di Sudan I in matrici alimentari complesse
No full textThe EU Commission Decision on emergency measures concerning hot chilli and red hot chilli products coming into any EC member state, requires that the consignments of such products should be accompanied by an analytical report showing that they are free from Sudan I. This paper proposes an HPLC-DAD method useful for a rapid and reliable identification and quantification of Sudan I in different food products
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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