CHANGES IN MICROBIAL PARAMETERS AND GAS-COMPOSITION DURING MODIFIED ATMOSPHERE STORAGE OF FRESH PORK LOIN CUTS

被引:38
作者
MCMULLEN, LM [1 ]
STILES, ME [1 ]
机构
[1] UNIV ALBERTA,DEPT FOOD SCI,EDMONTON T6G 2P5,ALBERTA,CANADA
关键词
D O I
10.4315/0362-028X-54.10.778
中图分类号
Q81 [生物工程学(生物技术)]; Q93 [微生物学];
学科分类号
071005 ; 0836 ; 090102 ; 100705 ;
摘要
The storage life of modified atmosphere packaged pork loin cuts in 40% CO2 and 60% N2 was determined at -1, 4.4, and 10-degrees-C in three packaging films with oxygen transmission rates (OTR) of 0.0, 12.6, and 26.5 ml/m2/24 h at 23-degrees-C, 0% relative humidity and 1 atm pressure. The pork loin cuts were "commercially" or "aseptically" prepared. Gas atmosphere of the packages, microbial load, and pH were monitored throughout storage. The principal factor influencing change in the headspace gases under the conditions of these studies was gas transmission through the packaging film. A 100-fold difference in initial microbial load between commercially and aseptically prepared meat cuts resulted in a 2-week difference in storage life at both -1 and 4.4-degrees-C. Spoilage at each of the three storage temperatures could be attributed to the growth of different groups of bacteria and was influenced by package type. At -1-degrees-C, Brochothrix thermosphacta was the predominating microflora of samples stored in plastic film with an OTR of 26.5; lactic acid bacteria predominated on samples stored in foil packs with 0.0 and 12.6 OTR. At 4.4-degrees-C, lactic acid bacteria predominated, and at 10-degrees-C, Enterobacteriaceae predominated, regardless of packaging film. Under commercial packaging conditions in foil laminate packages with 0.0 or 12.6 OTR, storage life of pork cuts was 5 or 8 weeks at 4.4 or -1-degrees-C, respectively. This result was not definitive because of a difference among replicates. Samples in replicate 2 had a reduced storage life at each of the three storage temperatures.
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页码:778 / 783
页数:6
相关论文
共 29 条
[1]   EFFECT OF CONTROLLED GAS ATMOSPHERES AND TEMPERATURES ON QUALITY OF PACKAGED PORK [J].
ADAMS, JR ;
HUFFMAN, DL .
JOURNAL OF FOOD SCIENCE, 1972, 37 (06) :869-&
[2]  
[Anonymous], 1991, PRINCIPLES PROCEDURE
[3]  
AYRES JOHN C., 1960, FOOD RES, V25, P1
[4]   CARBON-DIOXIDE AS A CONTROLLER OF THE SPOILAGE FLORA OF PORK, WITH SPECIAL REFERENCE TO TEMPERATURE AND SODIUM-CHLORIDE [J].
BLICKSTAD, E ;
MOLIN, G .
JOURNAL OF FOOD PROTECTION, 1983, 46 (09) :756-&
[5]   QUALITY CHARACTERISTICS OF VACUUM PACKAGED BEEF AS AFFECTED BY POSTMORTEM CHILL STORAGE TEMPERATURE, AND STORAGE INTERVAL [J].
CARPENTER, ZL ;
BEEBE, SD ;
SMITH, GC ;
HOKE, KE ;
VANDERZANT, C .
JOURNAL OF MILK AND FOOD TECHNOLOGY, 1976, 39 (09) :592-599
[6]   EFFECT OF CO2-N2 ATMOSPHERES ON THE MICROBIAL-FLORA OF PORK [J].
CHRISTOPHER, FM ;
SMITH, GC ;
DILL, CW ;
CARPENTER, ZL ;
VANDERZANT, C .
JOURNAL OF FOOD PROTECTION, 1980, 43 (04) :268-&
[7]  
CHRISTOPHER FM, 1979, J FOOD PROTECT, V42, P240, DOI 10.4315/0362-028X-42.3.240
[8]  
CLARK D S, 1969, Canadian Institute of Food Technology Journal, V2, P72
[9]  
DAUN H, 1971, J FOOD SCI, V36, P1011
[10]   EFFECT OF PACKAGING UNDER CARBON-DIOXIDE, NITROGEN OR AIR ON THE MICROBIAL-FLORA OF PORK STORED AT 4-DEGREES-C [J].
ENFORS, SO ;
MOLIN, G ;
TERNSTROM, A .
JOURNAL OF APPLIED BACTERIOLOGY, 1979, 47 (02) :197-208