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  • 1
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Lamb chops and steaks from fresh (F) or vacuum packaged (VP) racks, loins and legs were packaged in polyvinyl chloride (PVC) film or vacuum packaged in high oxygen-barrier (HOB) film. Use of previously vacuum packaged (PVP) cuts did not affect overall appearance of rib or loin chops during subsequent retail display but HOB film-packaged leg steaks from PVP cuts had lower overall appearance scores than did leg steaks from F cuts. Prior VP storage negatively affected flavor desirability and odor at the conclusion of retail display (4 days in PVC or 10 or 15 days in HOB film). Pseudomonas spp. were a dominant part of the microflora of PVC-wrapped chops while L. cellobiosus was a dominant part of the microflora of HOB-wrapped chops.
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Vacuum packaged beef strip loins (n = 72) were stored (2 ° 1°C) for either 0, 12 or 24 days before fabrication; steaks were packaged and displayed (2°C or 7°C) up to 6 days in oxygen-permeable film or up to 30 days in vacuum packages (medium or high oxygen-barrier film). Steaks displayed at 2°C, rather than 7°C, tended to have higher overall appearance scores especially when steaks were from 12 or 24 day subprimals. Overall palatability of vacuum packaged steaks was unacceptable after 10–15 days of display. Vacuum packaged steaks can be displayed for 10 days if: (1) steaks are from relatively fresh subprimals, (2) steaks are vacuum packaged with high oxygen-barrier film, and (3) steaks are displayed at 2°C. Although visual scores for vacuum packaged steaks were acceptable for 20–30 days, off-odors and off-flavors were limiting factors in determining shelf-life.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 42 (1977), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Yersinia enterocolitica counts of inoculated beef and pork as determined from confirmed isolates picked from trypticase soy agar plates were similar to the counts of confirmed enamel-black colonies on bismuth sulfite agar plates. With three strains of Y. enterocolitica increases in count occurred on raw beef held over a 10-day period at 0–1°C. When inoculated raw or cooked beef and pork were stored at 7°C (0–10 days) or at 25°C (0–24 hr) large increases in Y. enterocolitica count occurred. At 25°C the increases in Y. enterocolitica counts were somewhat greater on cooked than on raw products. These differences in count may have been caused by (a) differences in the physicochemical characteristics of the meat (raw vs cooked) and/or (b) differences in the level and type of microbial flora that developed on these products. In addition to Y. enterocolitica, Staphylococcus and Micrococcus spp. often were dominant on cooked products, Pseudomonas and Microbacterium spp. on raw meats.
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Wholesale cuts of fresh beef were vacuum packaged at low, intermediate or high degrees of vacuum and stored at l-3°C for 7, 14, 21, 28 or 35 days. Bacterial counts of samples after 7 and 14 days of storage were low [mean count 〈 104 per in.2 (6.45 cm2)] irrespective of degree of vacuum. Lactobacilli and anaerobic agar plate counts of cuts stored under high vacuum for 21-35 days tended to be lower than those of comparable cuts stored under low or intermediate vacuum. This was also true, but much less frequently, for the psychrotrophic and mesophilic counts. Largest increases in bacterial counts occurred between 14 and 21 days of storage. Fluorescent pseudomonads represented only a small percentage of the total microbial population of vacuum packaged beef cuts. Lactobacilli and anaerobic plate counts of vacuum-packaged cuts were very similar. The psychrotrophic bacterial population of cuts stored for 28 days consisted primarily of Lactobacillus sp., while Pseudomonas sp. and Enterobacteriaceae represented only a small percentage of the psychrotrophic microflora at that time.
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  • 5
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Characteristics are presented for Yersiniu enterocoliticu-like organisms isolated from vacuum-packaged beef and lamb stored for 21-35 days at l-3°C. Isolation of this organism was more frequent after 28 days of storage under vacuum conditions than under nonvacuum conditions (leaker packages). A higher incidence of isolates was obtained from cuts packaged under high vacuum conditions.
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: In ice stored shrimp, Vibrio, Pseudomonas and/or Moraxella-Acineto-batter species were initially dombant. After 12–15 days, Vibrio sp. had disappeared and Pseudomonas sp. predominated followed by Moraxella-Acinetobacter sp. The mean increase in aerobic plate count over this period was 2.2–2.4 log. In the melting ice (drip) Moraxella-Acine-tobacter, Pseudomonas, Flavobacterium, Micrococcus, Vibrio, Corynebacterium, Staphylococcus, Alcaligenes and yeasts were present initially. After 9–13 days, Vibrio, Flavobacterium and Micrococcus sp. could not be detected in the drip, whereas Pseudomonas or Moraxella-Acinetobacter sp. remained present or in some cases increased. The mean increase in bacterial count of the drip was 3.4 Jog. Considering the loss in TVN in the drip, there was a net increase in TVN ranging from 6.7–60.1 mg N/100g. AA-N levels in shrimp decreased during storage. The TVN-AA-N ratio of drip did not increase significantly until bacterial levels reached 10 per ml drip.
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Of 153 samples of oysters, water and sediment tested 94 (61.4%) were positive for V. parahaemolyticus. In 87% of the positive oyster samples the level of V. parahaemolyticus was 〈 100 per g. Standard Plate Counts of oysters ranged from 5.0 × 103 to 〉 3.0 × 107 (mean 2.5 × 106) per g, Aerobic Plate Counts from 3.0 × lo3 to 〉 3.0 × 107 (mean 1.8 × 106) per g. No seasonal distribution of V. parahaemolyticus was apparent. No statistically significant relationship existed between V. parahaemolyticus count of oysters and bacteriological (Standard Plate Count, Aerobic Plate Count, coliform, fecal coliform and E. coli counts) and environmental parameters (water temperature, salinity, pH, dissolved O2, sampling depth, tide, wind and rainfall).
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  • 8
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Levels of V. parahaemolyticus did not increase greatly in most samples of shellstock held for 3 days at 25°C while total bacterial counts frequently increased l–2 logs. The data from nine market surveys indicated that V. parahaemolyticus counts of oysters usually decreased during processing and subsequent storage. On the other hand, Standard Plate Counts increased in the majority of samples after storage at refrigeration temperatures. V. parahaemolyticus counts of composite samples (12 oysters) usually were lower than the mean count of the individual oysters.
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  • 9
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 41 (1976), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Of 703 suspect V. parahaemolyticus isolates from TCBS plates, representing oyster, water, and sediment samples, 319 (45%) were confirmed as V. parahaemolyticus. The most common reason for suspect colonies to fail confirmation was their ability to grow in trypticase peptone broth with 10% NaCL When 922 confirmed isolates were tested serologically 72 (7.8%) were typable. The most predominant serotype was 05:K17. Of 2218 confirmed isolates from marine sources only 0.18% were Kanagawa positive.
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  • 10
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 40 (1975), S. 0 
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
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