Capillary Electrophoresis Separation of Protein Composition of γ-Irradiated Food Pathogens Listeria monocytogenes and Staphylococcus aureus

which were previously treated at different irradiation doses., one protein (50 S ribosomal protein) with the MW of 16.3 kDa was significantly decreased at a low dose of irradiation treatment and the other protein (transcriptional regulator CtsR) with the MW of 17.7 kDa was increased significantly (P≤0.05) at all doses of irradiation treatment compared to control.. The research further confirmed that capillary electrophoresis is a useful method to separate and analyse proteins expression which may be related to the resistance or sensitivity of food pathogens to γ-irradiation

THE EFFECT OF HOUSING SYSTEM ON CARCASS TRAITS AND MEAT QUALITY OF RABBIT

[EN] One hundred and sixty one weaned New Zealand White rabbits were housed in 0.4x0.4 m cages (3 rabbits/cage, 18.7 rabbits/m2) or in 3x3.3 m pen on deep litter (80 rabbits/pen, 8.1 rabbits/m2). At 13 weeks of age the pen-housed rabbits (n=52) had lower body weight (2318 vs 2437 g; P<0.01) and dressing percentage (59.8 vs 61.0 %; P<0.01), higher proportion of the fore part (32.3 vs 31.4 %; P<0.01) and hind part (40.3 vs 37.9 %; P<0.001), and lower proportion of the intermediate part of the carcass (27.5 vs 30.7 %; P<0.001) than the cage-housed rabbits (n=68). The percentage of perirenal fat was lower in the pen-housed rabbits (0.45 vs 0.83 % P<0.001) than in the cage-housed group. The meat on the hind legs (HL) and the m. longissimus dorsi (MLD) of pen-housed rabbits contained more water (HL: 75.0 vs 73.9 %; MLD: 74.6 vs 74.0 %; P<0.001) but less protein (HL: 21.3 vs 21.5 %; MLD: 23.6 vs 23.9 %; P< 0.05) and fat (HL: 2.48 vs 3.36 %; MLD: 0.65 vs 0.90 %; P<0.05) than those kept in cages. The housing system had no effect on ash content and pH value of the meat samples.The research was supported by the Ministry of Education (project no.: 0089/2001)1Metzger, S.; Kustos, K.; Szendrõ, Z.; Szabó, A.; Eiben, C.; Nagy, I. (2003). THE EFFECT OF HOUSING SYSTEM ON CARCASS TRAITS AND MEAT QUALITY OF RABBIT. World Rabbit Science. 11(1):1-11. doi:10.4995/wrs.2003.492SWORD11111