At the end of shelf life, the dominant organism was Lactococcus. MAP can extend the shelf life of oyster, and the storage temperature was important. The dominant organisms in samples packaged with CO2/N2/O2 were Corynebacterium (stored at 5℃) and Micrococcus (stored at 0℃).
During a chilled storage,Shewanella putrefaciens that dominated in the bacterial flora of Pseudosciacna crocea in chilled chain grew faster than other bacteria,and its proportion reached 86.0% at the end of shelf life.
Bacterial flora and identification of dominated spoilage organisms on cultured Pseudosciaena crocea at the end of shelf life during storage at 0 ℃ and 5 ℃ were qualitatively and quantitatively investigated,based on the colony and cellular morphology,biochemical and physiological characteristics as well as whole-cell fatty acid composition,and applied with Sensititre,BioFosun,MIDI bacteria identification systems.
Results from tested strains were compared with database values in the bacterial identification systems,indicating the dominated spoilage organisms were Shewanella putrefaciens.
Slices of spiced beef were dipped in four different mixtures (A: 2% acetic acid,B:A+2% nisin,C:B+1% chitosan,D:C+5% sorbic acid)for 30-40s ,and allowed to drip for 2-3min before vaccum packeged. The effect of different mixture on the shelf-life of spiced beef stored at 30℃ was studied. The results showed that all of the B,C,D solution could greatly reduce the bacterial numbers and extended the shelf-life of spiced beef, especially the D solution is best(P<0.05) ;The spoiiaged bacteria on spiced beef treated...
Fresh pork were separately dipped for 10s in 1% chitosan-2% acetic acid mixture (CA), 2% acetic acide solution (A) and sterile distilled water, and allowed to drip for 3-5min before wrapped in plastic films of different oxygen permeability. Inhibition of CA and A on the growth of spoilaged bacteria on the meat was studied at 30℃, including the total bacterial count,lactobacillus, Enterobacteri-aceae, Staphylacoccus, Clostridium,Mould and Yeast, and the influence of plastic films of different oxygen permeabi...
The quality and bacterial flora changes of cultured Pseudosciacna crocea from SanDu bay in Fujian province in a chilled chain were investigated.The total viable count that was influenced by sanitary condition of the cultured waters on newly caught Pseudosciacna crocea reached 4.1×10~6 cfu/g.Aeromonas hydrophila(25.5%) dominated in the microflora,and Enterobacter cloacae and Cirtobacter freundii were in smaller proportion.There was no significant pollution in the preservation on basis of the total viable cou...