Modified atmosphere packaging improves retail display life of lamb cuts with variation between loin and knuckle

2005 ◽  
Vol 45 (5) ◽  
pp. 585 ◽  
Author(s):  
H. A. Channon ◽  
S. R. Baud ◽  
P. J. Walker
Keyword(s):  
Electrical Stimulation ◽  
Modified Atmosphere Packaging ◽  
Quadriceps Femoris ◽  
Constant Current ◽  
Modified Atmosphere ◽  
Retail Display ◽  
Retail Cuts ◽  
Ageing Period ◽  
Stimulation Control ◽  
Maximum Voltage

This study was conducted to determine the effect of electrical stimulation [control or stimulated (applied for 20 s using a constant current of 600 mA peak and maximum voltage of 550 V with a frequency of either 14 Hz or 10 Hz], ageing period (7, 21 or 35 days) and packaging method [modified atmosphere packaging (MAP) or overwrapped] on the retail display life of lamb [bone-in loin (M. longissimus thoracis et lumborum) chops and boneless leg steaks from the knuckle (M. quadriceps femoris)]. The colour and retail acceptability of lamb cuts were assessed both subjectively and objectively, using a chromameter, after 3 (midpoint of commercial retail display life; midpoint) and 5 (endpoint of commercial retail display life; endpoint) days for overwrapped product and at 5 (midpoint) and 9 (endpoint) days for MAP product. Retail display life of lamb (assessed both objectively and subjectively) was improved (P<0.001) by packaging lamb cuts into modified atmosphere compared with overwrapped lamb cuts. Electrical stimulation and length of ageing period before preparation into retail cuts did not influence colour or retail display life of lamb loin chops or leg steaks. Although the interaction of ageing period and packaging method were significant (P<0.001) for subjective colour, acceptability and retail grade of lamb loin chops and leg steaks at the midpoint of display life, these effects were inconsistent. This study highlighted that further work is necessary to determine potential means of improving the colour stability of lamb to enhance its retail display life, particularly cuts of the M. quadriceps femoris.

New electrical stimulation technologies for sheep carcasses New electrical stimulation technologies for sheep carcasses

2005 ◽  
Vol 45 (5) ◽  
pp. 575 ◽  
Author(s):  
F. D. Shaw ◽  
S. R. Baud ◽  
I. Richards ◽  
D. W. Pethick ◽  
P. J. Walker ◽  
...  
Keyword(s):  
Electrical Stimulation ◽  
High Voltage ◽  
Consumer Satisfaction ◽  
Electrode System ◽  
Constant Current ◽  
Eating Quality ◽  
Meat Eating ◽  
Medium Voltage ◽  
Sheep Meat ◽  
Maximum Voltage

High voltage electrical stimulation applied to the lamb carcass at the end of the dressing procedure often leads to an improvement in overall product quality by reducing the incidence of toughness. It would be advantageous if the same results could be consistently achieved with the use of lower, safer, voltages — medium voltage electrical stimulation. Experiments were conducted to determine the effect of medium voltage electrical stimulation applied to wool-on carcasses on meat quality as assessed using the Sheep Meat Eating Quality protocols. A further experiment examined the interaction of electrical stimulation and meat aging time on the consumer acceptance of lamb meat. In the first experiment, 3 treatments: control (non-stimulated), medium voltage electrical stimulation (applied to the wool-on carcass) and high voltage electrical stimulation (applied at the completion of dressing) were examined. Samples of the loin (LTL) and rump (GM) muscles were evaluated by consumers using Sheep Meat Eating Quality protocols. For both muscles, the consumers gave higher scores for tenderness, juiciness, flavour and overall acceptability to the stimulated product (P<0.001). There were no statistically significant differences between the 2 stimulation treatments. The second experiment was conducted at a commercial lamb-processing abattoir that had installed a prototype automated electrode system designed to work at chain speed. Lambs received either no stimulation (control), low current medium voltage electrical stimulation (constant current 300 mA peak, 15 Hz, maximum voltage 550 V peak) or high current medium voltage electrical stimulation (constant current 600 mA peak, 15 Hz, maximum voltage 550 V peak) immediately after sticking. Electrical stimulation improved both the objective and sensory (Sheep Meat Eating Quality) eating quality attributes of lamb loin muscle when assessed following 2 days of ageing. When expressed according to consumer satisfaction rating, 30, 37 and 70% of the loins receiving low, high or no electrical stimulation, respectively, were rated as unsatisfactory at 2 days of ageing. At 4 days of ageing no loins from carcasses in the low stimulation treatment were rated by consumers to be unsatisfactory (P<0.05) compared with either non-stimulated (40%) or high-stimulated loins (35%). With respect to the effects of aging meat, electrical stimulation improved the consumer score at 2 days post-stunning by 8.9 and 4.7 points for tenderness and overall liking, respectively. Further linear improvements due to aging were similar for both electrical stimulation and unstimulated products. Under conditions of no electrical stimulation used in this experiment, 10 days aging results in tenderness and overall liking scores greater than 60 and with ES similar scores are achieved in 5 days. Consumer scores over 60 greatly reduce the chance of meat being classified as unsatisfactory.

scholarly journals Modified Atmosphere and Humidity Film Reduces Browning Susceptibility of Oriental Melon Suture Tissue during Cold Storage

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1329
Author(s):  
Me-Hea Park ◽  
Eun-Ha Chang ◽  
Hae-Jo Yang ◽  
Jung-Soo Lee ◽  
Gyung-Ran Do ◽  
...  
Keyword(s):  
Shelf Life ◽  
Cold Storage ◽  
Chilling Injury ◽  
Modified Atmosphere Packaging ◽  
Summer Season ◽  
Modified Atmosphere ◽  
Display Condition ◽  
Browning Index ◽  
Oriental Melon ◽  
Retail Display

Oriental melons have a relatively short shelf life as they are harvested during the summer season and susceptible to cold-induced injuries. Typical chilling injury when stored at 4 °C is expressed as browning of the fruit suture. To prolong the shelf life and reduce browning of the fruit, the effects of modified atmosphere packaging (MAP), X-tend modified atmosphere (MA)/modified humidity (MH) bulk packaging (XF), and polyethylene (PE) packaging, on oriental melons were investigated during storage at 4 °C and 10 °C for 14 days and under retail display conditions at 20 °C. The O2 concentrations in PE packages stored at 4 °C and 10 °C ranged from 17.4 to 18.5%, whereas those in XF packages were reduced to 16.3–16.6%. The CO2 content of XF package (4.2–4.6%) was higher than that of PE package (1.4–1.9%) stored at 4 °C or 10 °C. Relative humidity (RH) saturated in the PE packages but not in the XF packages after seven days of storage. Furthermore, PE packages performed better at maintaining melon weight and firmness than XF packages during storage at 10 °C for 14 days and under retail display conditions at 20 °C. PE and XF packages effectively reduced the browning index of the peel and white linear sutures of oriental melons compared with the unpackaged control during cold storage at 4 °C, and this observation was maintained at the retail display condition at 20 °C. The enhanced CO2 levels, reduced O2 levels, and optimal RH values that were provided by the MAP, prevented the browning symptoms, and improved the marketability and shelf life of oriental melons.

Effect of Acid Resistance of Escherichia coli O157:H7 on Efficacy of Buffered Lactic Acid To Decontaminate Chilled Beef Tissue and Effect of Modified Atmosphere Packaging on Survival of Escherichia coli O157:H7 on Red Meat

2001 ◽  
Vol 64 (11) ◽  
pp. 1661-1666 ◽  
Author(s):  
M. UYTTENDAELE ◽  
E. JOZWIK ◽  
A. TUTENEL ◽  
L. DE ZUTTER ◽  
J. URADZINSKI ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Lactic Acid ◽  
Modified Atmosphere Packaging ◽  
Acid Resistance ◽  
Red Meat ◽  
Modified Atmosphere ◽  
Escherichia Coli O157 ◽  
The Public ◽  
E Coli ◽  
Retail Cuts

The present study examined the effect of pH-independent acid resistance of Escherichia coli O157:H7 on efficacy of buffered lactic acid to decontaminate chilled beef tissue. A varied level of acid resistance was observed among the 14 strains tested. Eight strains were categorized as acid resistant, four strains as acid sensitive, and two strains demonstrated acid-inducible acid resistance. The survival of an acid-resistant (II/45/4) and acid-sensitive (IX/8/16) E. coli O157:H7 strain on chilled beef tissue treated with 1 and 2% buffered lactic acid, sterile water, or no treatment (control) was followed. A gradual reduction of E. coli O157:H7 was noticed during the 10 days of storage at 4°C for each of the treatments. Decontamination with 1 and 2% buffered lactic acid did not appreciably affect the pathogen. Differences in the pH-independent acid resistance of the strains had no effect on the efficacy of decontamination. The effect of modified atmosphere packaging (MAP) on survival of E. coli O157:H7 in red meat was also studied. MAP (40% CO2/60% N2) or vacuum did not significantly influence survival of E. coli O157:H7 on inoculated sliced beef (retail cuts) meat compared to packing in air. The relative small outgrowth of lactic acid bacteria during storage under vacuum for 28 days did not affect survival of E. coli O157:H7. Neither lactic acid decontamination nor vacuum or MAP packaging could enhance reduction of E. coli O157:H7 on beef, thus underlining the need for preventive measures to control the public health risk of E. coli O157:H7.

scholarly journals 77 Improving lean muscle color of atypical dark- cutting beef by antioxidant-enhancement and modified atmospheric packaging

2019 ◽  
Vol 97 (Supplement_1) ◽  
pp. 25-26
Author(s):  
Andrew M Cassens ◽  
Gretchen Mafi ◽  
Deb VanOverbeke ◽  
Ranjith Ramanathan
Keyword(s):  
Carbon Monoxide ◽  
Modified Atmosphere Packaging ◽  
Color Measurement ◽  
Modified Atmosphere ◽  
Surface Color ◽  
Modified Atmospheric Packaging ◽  
Red Color ◽  
Visual Color ◽  
Retail Display ◽  
Muscle Color

Abstract Any deviation from the bright-red color of beef leads to discounted price or consumer rejection. Atypical dark-cutting beef represents darker color of lean around a pH 5.6 – 5.8. However, limited studies have determined the postharvest practices to improve the lean color of atypical dark-cutting beef. Therefore, the objective was to evaluate the effects of rosemary-enhancement and modified atmospheric packaging on atypical dark-cutting beef. Atypical dark-cutting beef strip loins (n = 13, pH=5.70 ± 0.09; ADC) and USDA Choice beef strip loins (n = 6, pH=5.57 ± 0.1; CH) were selected within 72 h of harvest. Atypical dark-cutting strip loins were divided into 2 sections, and randomly assigned to one of the following enhancement treatments: control non-enhanced (ADC), or a 1.1% rosemary-enhanced treatment (ADCE). After enhancement, 2.54 cm steaks were cut from CH, ADC, and ADCE strip loins and assigned to 1 of 3 packaging treatments: polyvinyl chloride overwrap (PVC), carbon monoxide modified atmosphere packaging (CO-MAP; 0.4% CO, 69.6% N, and 30% CO2), and high-oxygen modified atmospheric packaging (HiOx-MAP; 80% O2 and 20% CO2). A HunterLab MiniScan was used to determine color during the 6 d simulated retail display. Visual color measurement for muscle darkening (MD), muscle color (MC), and surface discoloration (SD) were recorded on d 2, 4, and 6 of retail display. There was a significant enhancement x packaging interaction for instrumental and visual color measurements. For all packaging types, ADCE steaks possessed greater L* values than DC steaks. In addition, ADCE steaks packaged in HiOx-MAP or CO-MAP had brighter-red color than ADC steaks. Furthermore, ADCE and C steaks had less muscle darkening compared with ADC steaks for MD and MC attributes. The results suggest that enhancement and modified atmospheric packaging have the potential to improve the surface color of atypical dark-cutting beef.

scholarly journals Modified Atmosphere and Humidity Film Prevents Browning and Improves Quality of Oriental Melons

2020 ◽  
Author(s):  
Me-Hea Park ◽  
Eun-Ha Chang ◽  
Chang Min-Sun ◽  
Hae-Jo Yang ◽  
Jung-Soo Lee ◽  
...  
Keyword(s):  
Shelf Life ◽  
Chilling Injury ◽  
Modified Atmosphere Packaging ◽  
Summer Season ◽  
Modified Atmosphere ◽  
Display Condition ◽  
Browning Index ◽  
Co2 Levels ◽  
Retail Display

Oriental melons have a relatively short shelf life as they are harvested during the summer season and susceptible to cold-induced injuries. Typical chilling injury when stored at 4℃ is expressed as browning of the fruit suture. To prolong the shelf life and reduce browning of the fruit, the effects of modified atmosphere packaging (MAP), X-tend modified atmosphere (MA)/modified humidity (MH) bulk packaging (XF), and polyethylene (PE) packaging, on oriental melons were investigated during storage at 4℃ and 10℃ for 14 days and under retail display conditions at 20℃. The O2 concentrations in PE packages stored at 4℃ and 10℃ ranged from 17.4&ndash;18.5%, whereas those in XF packages were reduced to 16.3&ndash;16.6%. The CO2 content of XF package (4.2&ndash;4.6%) was higher than that of PE package (1.4&ndash;1.9%) stored at 4℃ or 10℃. Relative humidity (RH) saturated in the PE packages but not in the XF packages after seven days of storage. Furthermore, PE packages performed better at maintaining melon weight and firmness than XF packages during storage at 10℃ for 14 days and under retail display conditions at 20℃. PE and XF packages effectively reduced the browning index of the peel and white linear sutures of oriental melons compared with the unpackaged control during cold storage at 4℃, and this observation was maintained at the retail display condition at 20℃. The enhanced CO2 levels, reduced O2 levels, and optimal RH values that were provided by the MAP, prevented the browning symptoms and improved the marketability and shelf life of oriental melons.

scholarly journals Effects of Antioxidant/Beef Flavor-Enhancement and Modified Atmosphere Packaging of Dark-Cutting Beef on Retail Display, Flavor, and Tenderness

2018 ◽  
Vol 2 (2) ◽  
pp. 55-55
Author(s):  
A. Cassens ◽  
K. Wills ◽  
M. Pfeiffer ◽  
G. Mafi ◽  
D. VanOverbeke ◽  
...  
Keyword(s):  
Modified Atmosphere Packaging ◽  
Modified Atmosphere ◽  
Beef Flavor ◽  
Retail Display

Modified atmosphere packaging of strawberry fruit: Effect of package perforation on oxygen and carbon dioxide / Envasado de fresas en atmósfera modificada: Efecto de la perforación del envase en el contenido de oxígeno y dióxido de carbono

2000 ◽  
Vol 6 (1) ◽  
pp. 33-38 ◽  
Author(s):  
C. Sanz ◽  
A.G. Perez ◽  
R. Olias ◽  
J.M. Olias
Keyword(s):  
Gas Exchange ◽  
Modified Atmosphere Packaging ◽  
Site Effect ◽  
Gas Content ◽  
Modified Atmosphere ◽  
Strawberry Fruit ◽  
Exchange Site ◽  
Stratification Effect ◽  
Refrigerated Transport ◽  
Retail Display

The effect of film perforation on gas content during modified atmosphere packaging of strawberry fruit was studied. Camarosa strawberries were refrigerated at 2 °C, and wrapped with polypropy lene (PP) film with perforations of 1 and 2 mm diameter. Fruits were held at 2 °C during three days, simulating refrigerated transport, and then at 20 °C for four days to simulate retail display tempera tures. Perforation degree affected final gas contents inside the packages, ranging from 5.68-25.96% CO2 and from 4.84-15.69% O2 on day 7. Different gas content profiles were found among packages with similar perforated surface but distinct diameter perforations, which could infer a perforation edge effect on gas exchange. Neither a CO, stratification effect nor a gas exchange site effect were observed for this kind of perforation-mediated modified atmosphere packaging of strawberries.

Centralized Packaging of Retail Meat Cuts: A Review

1999 ◽  
Vol 62 (4) ◽  
pp. 418-425 ◽  
Author(s):  
G. TEWARI ◽  
D. S. JAYAS ◽  
R. A. HOLLEY
Keyword(s):  
Lactic Acid ◽  
Shelf Life ◽  
Storage Temperature ◽  
Storage Period ◽  
Modified Atmosphere ◽  
Fresh Meat ◽  
Storage Container ◽  
Retail Meat ◽  
Retail Display ◽  
Retail Cuts

Centralized packaging of retail meat cuts is growing more popular because of its economies and potential to maintain quality, enhance safety, and extend the shelf life of fresh meat. Requirements for optimizing shelf life of centrally prepared retail cuts for periods up to 15 weeks are slightly different from those needed to extend the shelf life of fresh, chilled meat. Chilled meat primarily deteriorate at the cut or uncut muscle surface. In long-term storage, primal cuts are placed in an atmosphere saturated with carbon dioxide and containing very low residual oxygen. These cuts are held at −1.5 ± 0.5°C. When the meat is removed, it is fabricated into retail or food service cuts. New fresh surfaces are created in the process, revitalizing the meat's appearance. After being prepared for retail display, the meat normally has four more days of shelf life. Depending on the meat species, shelf life is usually limited by development of undesirable organoleptic changes, usually defects in color, which are independent of microbial presence. The microbes consist of a lactic acid bacterial population that maximizes under storage conditions at about 108 CFU/cm2 well before shelf life ends. Circumstances are different with centralized distribution of retail-ready fresh meat. The wholesale storage period following initial packaging of the retail cuts is about 20 to 30 days. Prepared products must withstand retail display for up to 2 days without further manipulation of package contents. Retail packages are simply moved from their storage container (usually a unit or overwrap containing a modified atmosphere) to retail display, where desirable meat color develops upon exposure to air. Three gas atmospheres have some potential to satisfy storage needs for centralized distribution of retail-ready packages: 100% CO2, 100% N2, or 70% N2 + 30% CO2. Shelf life is limited by undesirable changes in surfaces exposed at initial packaging, caused by growth of psychrotrophic bacteria. If 100% CO2 is used, these are all lactic acid bacteria (LAB). Therefore, initial bacterial numbers on the meat and storage temperature become critical to success. The most attractive storage option is 100% CO2 used at −1.5 ± 0.5°C. This review presents the reason for that recommendation, along with basic concepts of meat chemistry, a discussion of modified atmosphere packaging, meat microbiology, and current results with simulated centralized packaging of retail-ready meats.

Antioxidant and modified atmosphere packaging prevention of discoloration in pork bones during retail display

Meat Science ◽  
2006 ◽  
Vol 72 (4) ◽  
pp. 713-718 ◽  
Author(s):  
C. Nicolalde ◽  
A.J. Stetzer ◽  
E.M. Tucker ◽  
F.K. McKeith ◽  
M.S. Brewer
Keyword(s):  
Modified Atmosphere Packaging ◽  
Modified Atmosphere ◽  
Retail Display

Physical and Sensory Characteristics of Pork Loins Stored in Vacuum or Modified Atmosphere Packages

1980 ◽  
Vol 43 (4) ◽  
pp. 272-276 ◽  
Author(s):  
L. C. HALL ◽  
G. C. SMITH ◽  
C. W. DILL ◽  
Z. L. CARPENTER ◽  
C. VANDERZANT
Keyword(s):  
Storage Period ◽  
Sensory Characteristics ◽  
Modified Atmosphere ◽  
Sensory Panel ◽  
Retail Display ◽  
Retail Cuts ◽  
Muscle Color ◽  
Panel Evaluation

Wholesale pork loins were either vacuum-packaged, packaged in an atmosphere of 20% CO2 + 80% N2 or packaged in an atmosphere of 40% CO2 + 60% N2. After storage, the primal cuts were evaluated visually for muscle color, fat cover appearance, off-odor, lean surface discoloration and overall appearance. Retail cuts fabricated from the wholesale loins were evaluated for surface discoloration and overall appearance during a 5-day retail display period or they were used for sensory panel evaluation. Few significant differences between packaging treatments were found during the storage period for traits evaluated on the primal cuts. Few significant differences between packaging treatments were observed for either retail display data or sensory panel evaluation.

Sign in / Sign up

Export Citation Format

Share Document