In:
Italian Journal of Food Safety, PAGEPress Publications, Vol. 4, No. 4 ( 2015-12-01)
Abstract:
The aim of this study was to evaluate the dietary effect of feeding pigs with diets enriched with sweet chestnut wood ( 〈 em 〉 Castanea sativa 〈 /em 〉 Mill.) or oregano ( 〈 em 〉 Origanum vulgaris 〈 /em 〉 L.) extract on the microbiological and chemical characteristics of cooked pork ham. Three groups of 10 pigs were fed with a control diet (CTRL), with the CTRL diet enriched with 0.2% of oregano extract (OR) and with the CTRL diet enriched with 0.2% of sweet chestnut wood extract (SCW), respectively. Six cooked hams per group were produced, sliced and packaged under a modified atmosphere (N2:CO2=80:20) and stored at refrigeration temperature (4±1°C). Three packages per cooked ham were sampled for analyses at three different storage times (0, 10 and 20 days). At day 0 time, antioxidant capacity of the products (ORACFL assay) and chemical composition were performed. At each sampling time, from all the samples the following analyses were performed: Total Microbial Count (TMC), Lactic Acid Bacteria count (LAB), 〈 em 〉 Enterobacteriaceae 〈 /em 〉 count, 〈 em 〉 Listeria monocytogenes 〈 /em 〉 , pH value, colour coordinates (L*, a*, b*), total basic volatile nitrogen (TBVN) and thio-barbituric reactive substances (TBARs) determinations. No differences in TMC, LAB and 〈 em 〉 Enterobacteriaceae 〈 /em 〉 count, pH, TBVN, chemical composition and L* values were registered between the three groups at all the sampling times considered. No 〈 em 〉 Listeria monocytogenes 〈 /em 〉 was detected in the samples tested. Significant differences were registered for ORACFL at 0 days, a* and b* values and TBARs value at 10 and 20 days of storage, with higher values for ORAC 〈 sub 〉 FL 〈 /sub 〉 , a* and b* values and lower values for TBARs in SCW and OR than CTRL. No antimicrobial effect could be recorded for OR and SCW but a higher oxidative stability, also highlighted by the colour maintenance, was observed in both OR and SCW.
Type of Medium:
Online Resource
ISSN:
2239-7132
DOI:
10.4081/ijfs.2015.5497
Language:
Unknown
Publisher:
PAGEPress Publications
Publication Date:
2015
detail.hit.zdb_id:
2717104-8
