Advanced
Effects of Procyanidin on Meat Quality and Shelf-Life for Preserving Pork Patties during Chilled Storage
Effects of Procyanidin on Meat Quality and Shelf-Life for Preserving Pork Patties during Chilled Storage
Food Science of Animal Resources. 2015. Aug, 35(4): 564-571
Copyright © 2015, Korean Society for Food Science of Animal Resources
This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licences/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
  • Received : April 30, 2015
  • Accepted : July 29, 2015
  • Published : August 31, 2015
Download
PDF
e-PUB
PubReader
PPT
Export by style
Article
Author
Metrics
Cited by
TagCloud
About the Authors
Jin Young, Jeong
Kuk-Hwan, Seol
Pil-Nam, Seong
Beom-Young, Park
Hyoun Wook, Kim
woogi78@korea.kr

Abstract
Grape seeds and pericarp are rich in procyanidins, a class of natural antioxidants and antimicrobials that can provide phytonutrients for healthy eating and extend food shelf life. The objective of this study was to assess the effect of procyanidins as preservatives in pork meat patties for 14 d. Pork patties were treated with 0, 0.1, or 0.3% procyanidin, and meat color, pH, volatile basic nitrogen (VBN), 2-thiobarbituric acid reactive substance (TBARS) values, and microbial populations were determined during storage at 4℃ for 14 d. The color of pork patties treated with procyanidin showed lower lightness and higher redness values than untreated controls, and procyanidin treatment reduced pH values significantly ( p <0.05). VBN values decreased significantly ( p <0.05) with the 0.3% procyanidin treatment and increased significantly ( p <0.05) during storage. TBARS values were markedly lower in procyanidin-treated meat than in the untreated control. In addition, procyanidin suppressed total bacterial colony and Escherichia coli counts significantly ( p <0.05) relative to the control samples. Our findings suggest that procyanidin could be used as a food preservative in pork patties due to its natural antioxidation and antimicrobial activities, and that it may contribute to an improved healthy diet.
Keywords
Introduction
The shelf life of meat products is shortened by microbial contamination resulting from manufacturing processes or storage conditions, and suitable meat product preservatives are thus required to prevent contamination by various pathogenic microbes that cause food-borne diseases in humans. Lipid oxidation and microbiological spoilage cause deterioration in quality and diminished nutritional value of meat products accompanied by alterations in meat color and flavor components ( Ahn ., 2007 ; Dave and Ghaly, 2011 ). Many additives have been used for centuries to preserve flavor and improve the taste or shelf life of meats, and recently, new natural and artificial additives have been identified as preservatives to prevent or inhibit food spoilage via their antioxidant or antimicrobial activities ( Barbosa-Pereira ., 2015 ; Mitropoulou ., 2015 ).
Antioxidants activities are exhibited by several vitamins, such as vitamin C, E, and the vitamin A precursor β-carotene, by some spices including rosemary and oregano, and by grapes ( Hemilä ., 2006 ; Rojas and Brewer, 2007 ; Sasse ., 2009 ). Moreover, the by-product or extract of grapes as antioxidant has been used in fish oil and frozen fish ( Pazos ., 2005 ), pork patties ( Nissen ., 2004 ), and cooked turkey ( Loizzo ., 2015 ; Sivarooban , 2007 ), and green tea has also been used to increase the shelf life of meat patties ( Bañón ., 2007 ; Jo ., 2003 ; Shah ., 2014 ). The antioxidant activity of these sources exhibit efficacy similar to that of synthetic antioxidants such as butylated hydroxyanisole (BHA) and butylated hydroxytoluene (BHT), but less than that of rosemary extract ( Karre ., 2013 ; Movileanu , 2013 ). Synthetic antioxidants are used to inhibit lipid oxidation, but recently, natural antioxidants are receiving greater attention from consumers due to increasing concerns of human health and/or biology effects.
Grapes are of special interest as a source of antioxidants due to their high content of phenolic compounds. Grape seeds are especially rich in phenolic compounds such as catechin, epicatechin, and dimeric, trimeric, and tetrameric procyanidins ( Negro ., 2003 ), although monomeric procyanidins in grape seed extract are not able to inhibit lipid hydroperoxide or propanal formation ( Hu ., 2004 ). In particular, procyanidin is an excellent, wellknown antioxidant that is more effective than either vitamin C or E, and the polyphenolic procyanidin compounds in grapes are contained in both the seed and the pericarp ( Shi ., 2003 ; Wood ., 2002 ). However, both seed and the pericarp are discarded after being processed.
Procyanidins are a family of proanthocyanidin compounds called flavonoids, which in oligomeric form have antioxidant properties. Some studies of procyanidin content and structure in foods have addressed the relevance of the antioxidant properties and potential effects of procyanidin additives on pork patties, but their effects have not been well established. Thus, the objective of this study was to investigate the effect of procyanidin on pork patty shelf life during various storage periods.
Materials and Methods
- Determination of experimental procyanidin concentrations
Procyanidin was obtained from Konkuk University, South Korea, as a brown powder of purity 97% (w/v). Procyanidins were extracted according to GMP standard from grape seeds. Powder is supplied with vacuum bags. Procyanidin concentrations were determined based on 2,2’-azino-bis-(3-ethylbenzothiazoline-6-sulfoni acid) (ABTS) radical scavenging activity. ABTS activity was determined for pork patties treated with procyanidin at concentrations of 0, 0.1, 0.3, 1, or 5%. Preliminary experiments showed that high procyanidin concentrations altered the thiobarbituric acid reactive substances (TBARS) values and color of the meat patties, and we treated pork patties with procyanidin concentrations of 0.1 and 0.3% in subsequent experiments, because ABTS radical scavenging activities of 1 and 5% were similar to 0.3% procyanidin.
- Preparation of pork patties
A fresh pork loin obtained from a local meat market and immediately processed it to form pork patties. The meat was trimmed to remove the excess fat and connective tissue, and minced twice using a meat mincer (Model 7548, Biro MFG, Co., USA). The minced meat was mixed with procyanidin at concentrations of 0.1 and 0.3% and then formed into patties (100 g portions; 10 cm in diameter and 1.5 cm thick). The formed patties were heated in 80℃ water bath for 30 min and then cooled at 4±1℃ for 30 min to remove excess moisture. All patties were packaged in low-density polyethylene (LDPE) bags (25 μm thickness) with oxygen permeability and a water vapor transmission rate to protect against microbe at 4℃ for 14 d. We measured the color, pH, volatile basic nitrogen (VBN), and TBARS values and microbial populations with the pork patties for 0, 1, 3, 7, 10, and 14 d.
- Color measurement
Patty color parameters including lightness (L*), redness (a*), and yellowness (b*) were determined using a Minolta Color Reader (CR-400; Minolta, Japan). Before use, the colorimeter was standardized (L*=86.3, a*=0.3165, and b*=0.3142) using a calibration plate. Color was measured on the surface of the pork patties after opening the LDPE bags. Color determinations were taken in quadruplicate in different areas of the sample surface. The results were expressed as lightness (L*), redness (a*), and yellowness (b*).
- pH determination
Portions (5 g) of the pork patties were dissolved in 45 mL of distilled water and homogenized using a PT-MR 2100 homogenizer (Kinematica, Switzerland). A digital Orion 3-Star Plus pH meter (Thermo Scientific, USA) with a glass probe was used to measure pH values, which were determined for all experimental periods.
- Measurement of VBN content
The VBN content as an indicator of meat freshness was measured in this study. VBN was determined using the Conway microdiffusion method ( Conway, 1950 ). A meat sample (5 g) was mixed with 45 mL of distilled water and homogenized at 14,000 rpm for 1 min. The homogenate was filtered through no. 1 filter paper (Whatman, UK). The filtrate (1 mL) was transferred to the outer chamber of a Conway microdiffusion unit, and 1 mL of 0.01 N boric acid (H 3 BO 3 ) and 50 μL of Conway reagent (0.066% methyl red:0.066% bromocresol green, 1:1) as an indicator were added to the inner chamber of the device. The Conway unit was sealed immediately after the addition of 1 mL of 50% potassium carbonate (K 2 CO 3 ) to the outer chamber, and the materials were incubated at 37℃. The VBN contents were determined following the addition of 0.02 N sulfuric acid (H 2 SO 4 ) to the inner chamber of the Conway unit.
- Determination of TBARS values
The lipid peroxidation (i.e., lipid degradation) was monitored in pork patties using a TBARS assay. TBARS values were measured as described previously ( Witte ., 1970 ). Meat samples (10 g) were added to 35 mL of 2 M phosphate buffer (pH 7.2) [20% trichloroacetic acid (TCA)] and 50 mL of 7.2% butylated hydroxytoluene (BHT) and homogenized at 14,000 rpm for 1 min followed by filtration through Whatman no.1 filter paper. Filtered samples (5 mL) were mixed with 5 mL of 0.005 M 2-thiobarbituric acid (TBA) and incubated for 15 h in darkness. The absorbance of the mixture was measured at 530 nm (A530) using a double beam SpectraMax Plus 384 UV-VIS Spectrophotometer (Molecular Devices, USA). The results were expressed as mg of malonaldehyde/kg of the patty sample and calculated by multiplying the absorbance at 532 nm.
- Microbiological analysis
Microbial analysis was performed using 3M Petrifilm (3M Health Care, USA). Patty samples (25 g) were homogenized or blended with 225 mL of sterile distilled water, and the samples were diluted serially tenfold. Subsequently, 1 mL of each diluted sample was spread on Petrifilm Aerobic Count Plates (3M Health Care) to determine the total bacterial counts (TBCs), and the plates were incubated at 37±1℃ for 24-48 h. Escherichia coli was incubated on Petrifilm E. coli/Coliform Count Plates (3M Health Care) for 24-36 h under identical conditions. After incubation, the colonies were counted and transformed as log 10 colony forming units (CFU)/g of sample after 0, 1, 3, 7, 10, and 14 d of storage.
- Statistical analysis
The data are expressed as means±standard deviation (SD). Differences among mean values determined for different storage periods or treatments were evaluated using a Tukey’s multiple comparison of the SAS software (SAS Institute, USA). p <0.05 was considered to reflect statistical significance. All experiments were performed in triplicate or quadruplicate with replicates in each experiment.
Results and Discussion
- Color evaluation
The effect of procyanidin on the color of pork patties was evaluated for various storage periods ( Table 1 ). L* values were not significantly different at storage periods and procyanidin treatments. Generally, L* values were lower ( p <0.05) after 14 d of storage for the procyanidintreated samples than for the initial control. This finding was similar to those of previous studies. The particulate metmyoglobin was associated with color parameters in beef patties ( Bekhit ., 2003 ). Tea catechins treatment had an effect on L* values in meat patties ( Mitsumoto ., 2005 ).
Effect of procyanidin on the color values of pork patties during storage periods
PPT Slide
Lager Image
Mean±SD. n=7-8.a-dMeans in the same column with different letters are significantly differ (p<0.05). A-CMeans in the same row with different letters are significantly differ (p<0.05).L*, lightness; a*, redness; b*, yellowness. a, b, c, d: storage effects. A, B, C: procyanidin effects.
The value of a* did not change in the control during storage, but the a* values of the 0.1% procyanidin-treated samples increased gradually ( p <0.05) relative to the control at 10 d. Procyanidin treatment (0.3%) also increased a* value during storage. The values of b* also did not change significantly in the control during storage, but the b* values were significantly greater ( p <0.05) in the samples treated with 0.3% procyanidin compared to and 0.1% procyanidin, except 10 and 14 d.
Overall, the various procyanidin treatments and chilled storage times affected the color parameters of the pork patties. These results indicated that redness and yellowness were mainly different after procyanidin addition. Green tea and oregano extracts were previously shown to affect pork patty and beef color ( Camo ., 2011 ; Jo ., 2003 ). Meat color alters by antioxidant activity or own color of procyanidin. The increased color itself can result from color introduced by the procyanidin ( Carpenter ., 2007 ). Our results are similar to those of previous studies ( Millar ., 2000 ; Nam and Ahn, 2002 ). The addition of procyanidin to meat patties is potentially useful for prolonging the shelf life of meat products by preserving the red color, and consumer demand for acceptable meat color. Meat color in particular is a major factor in consumer purchasing decisions because it is assumed to be an indicator of meat quality and freshness ( Brewer ., 2002 ; Killinge ., 2004 ). Both of these characteristics have a major impact on consumer expectations of satisfaction ( Robbins ., 2003 ).
- pH values
The pH values were measured with procyanidin-treated pork patties ( Table 2 ). The pH value was not consistent change during all storage day. However, 0.3% procyanidin treatment was lower than those of control and 0.1% treatment during all storage time.
Effect of procyanidin on the pH values of pork patty during storage
PPT Slide
Lager Image
Mean±SD. n=7-8.a-cMeans in the same column with different letters are significantly differ (p<0.05). A-CMeans in the same row with different letters are significantly differ (p<0.05).a, b, c: storage effects. A, B, C: procyanidin effects.
Changes of pH values on meat patties can affect the water-holding capacity and meat qualities ( Parlak ., 2011 ). The pH values of meat products ( Banerjee ., 2012 ) and turkey thigh meat ( Du and Ahn, 2002 ) were reported to be decreased by broccoli powder as phenolic compounds. Broccoli had the highest phenolic amount compared to other vegetables such as, carrot, spinach, or onion ( Chu ., 2002 ). Overall, the pH values of the pork patties in this study were partly influenced by the procyanidin concentration.
- Volatile basic nitrogen (VBN) values
The VBN values of pork patties after procyanidin addition are summarized in Table 3 . The VBN values were not significantly different with procyanidin addition compared to the control except 0, 7, 10, and 14 d. The VBN values of the procyanidin-treated pork patties increased significantly ( p <0.05) during storage.
Effect of procyanidin on the volatile basic nitrogen (VBN) values of pork patties during storage
PPT Slide
Lager Image
Mean±SD. n=7-8.a-cMeans in the same column with different letters are significantly differ (p<0.05). A-CMeans in the same row with different letters are significantly differ (p<0.05).a, b, c: storage effects. A, B, C: procyanidin effects.
In this study, lower VBN values were associated with decreased protein breakdown caused by procyanidin, and the decrease in the VBN values of the pork patties during storage was caused by a reduction in the initial levels of common spoilage bacteria. Changes in VBN values are attributable to protein breakdown under aerobic ( Fraqueza ., 2008 ) or modified atmosphere ( Ahn ., 2000 ; Jay, 1992 ) package conditions and by the amino acid decarboxylase activity of microorganisms during storage ( Han ., 2006 ). Procyanidin exhibited a significant effect on the VBN content of the meat patties during storage. The VBN content in the meat patties treated with 0.3% procyanidin was lower than that of the patties treated with 0.01% procyanidin or the control patties. These results were similar to those for the changes in TBARS and the TBC in the pork patties described below. Meat quality such as, flavor, drip loss, hole water, color change, or texture affected in meat by lipid oxidation ( Weber and Antipatis, 2001 ) Thus, our findings suggest that pork patty shelf life can be improved slightly by the addition of 0.3% procyanidin.
- TBARS values
The changes in TBARS values during storage of pork meat patties treated with procyanidin are summarized in Table 4 . The TBARS values of the pork patties increased significantly ( p <0.05) during storage. Especially, The TBARS values of the procyanidin-treated samples were significantly lower ( p <0.01) than those of the control samples at all storage days. Overall, the lowest TBARS values were produced by the highest procyanidin concentration, and TBARS values were significantly lower ( p <0.05) in the procyanidin-treated pork patties than in the control.
Effect of procyanidin on the 2-thiobarbituric acid reactive substances (TBARS) values (mg malondialdehyde kg patty) of pork patties during storage
PPT Slide
Lager Image
Mean±SD. n=7-8.a-cMeans in the same column with different letters are significantly differ (p<0.05). A-CMeans in the same row with different letters are significantly differ (p<0.05).a, b, c: storage effects. A, B, C: procyanidin effects.
Previous studies showed that the addition of 5, 10, or 15% tomato paste to pork patties resulted in significantly lower ( p <0.05) TBARS values compared to controls due to the antioxidative activity of lycopene present in the tomato paste ( Kim ., 2013 ). The TBARS values of these pork patties increased significantly ( p <0.05) during storage. These results were similar to those of beef meat and meat products treated with different tomato paste and spice extracts ( Radha Krishnan ., 2014 ; Valenzuela ., 2014 ). Oxidative changes serve as an indicator of the degree of fresh meat product preservation, and the concentrations of grape antioxidants used in this study were sufficient to maintain the oxidative stability of the meat patties through the control of lipid oxidation. In general, the effect of lipid oxidation varies considerably depending on a complex interaction between various factors including the type and concentration of active compound(s) and the nature of the food system ( Pandey and Rizvi, 2009 ).
- Microbiological analysis
Changes in the aerobic bacteria population during storage of pork patties treated with procyanidin are summarized in Table 5 . No significant difference was observed among treatments and storage times of 0, 1, and 3 d. After 7 d of storage, the TBC values of the control and the 0.1 and 0.3% procyanidin-treated pork patties increased sig-nificantly ( p <0.05) relative to the initial TBC, but the TBC values of the procyanidin-treated patties were significantly lower ( p <0.05) than those of the control.
Effect of procyanidin on the population of aerobic bacteria (colony forming units per gram) of pork patties during storage
PPT Slide
Lager Image
Mean±SD. n=7-8.a-cMeans in the same column with different letters are significantly differ (p<0.05). A-CMeans in the same row with different letters are significantly differ (p<0.05).a, b, c: storage effects. A, B, C: procyanidin effects.
These results were similar to antimicrobial effects described previously ( Calvo ., 2008 ; Matsumoto ., 2013 ). The low bacterial counts of the procyanidin-treated patties appeared to result from the content of antimicrobials such as phenolic compounds. Phenolics were previously shown to be among the most important compounds with activity against bacteria ( Radha Krishnan ., 2014 ; Widsten ., 2014 ). Procyanidin can be used as an antibacterial agent to prevent the deterioration of pork meat patties caused by microbial contamination. E. coli was not detected in the procyanidin-treated samples and control during storage in this study (data not shown). Our findings suggest that food deterioration might not occur in meat processed using procyanidin.
Conclusion
Consumers increasingly demand healthier meat products, preferably free of artificial additives when possible. Procyanidin-treated samples exhibited significantly higher ( p <0.05) redness and yellowness values and lower ( p <0.05) VBN, TBARS, and TBC values compared to control samples during storage. The addition of procyanidin to pork patties had significant effects on color, pH, VBN, lipid oxidation, and microbial populations in a time- and dose-dependent manner. Therefore, procyanidin could be used as a natural antioxidant and antimicrobiological safety agent during the storage of meat and meat products. Our findings suggest that procyanidin can be used to improve the shelf life of pork patties and meat products, and improve food safety and freshness for consumers.
Acknowledgements
This work was carried out with the support of “Cooperative Research Program for Agriculture Science & Technology Development (Project title: Screening of starter cultures for Korean fermented sausage, Project No. PJ010 8602015)” and 2015 Postdoctoral Fellowship Program of National Institute of Animal Science, Rural Development Administration, Republic of Korea.
References
Ahn D. U. , Jo C. , Du M. , Olson D. G. , Nam K. C. 2000 Quality characteristics of pork patties irradiated and stored in different packaging and storage conditions Meat Sci. 56 203 - 209    DOI : 10.1016/S0309-1740(00)00044-9
Ahn J. , Grün I. U. , Mustapha A. 2007 Effects of plant extracts on microbial growth, color change, and lipid oxidation in cooked beef Food Microbiol. 24 7 - 14    DOI : 10.1016/j.fm.2006.04.006
Banerjee R. , Verma A. K. , Das A. K. , Rajkumar V. , Shewalkar A. A. , Narkhede H. P. 2012 Antioxidant effects of broccoli powder extract in goat meat nuggets Meat Sci. 91 179 - 184    DOI : 10.1016/j.meatsci.2012.01.016
Bañón S. , Díaz P. , Rodríguez M. , Garrido M. D. , Price A. 2007 Ascorbate, green tea and grape seed extracts increase the shelf life of low sulphite beef patties Meat Sci. 77 626 - 633    DOI : 10.1016/j.meatsci.2007.05.015
Barbosa-Pereira L. , Bilbao A. , Vilches P. , Angulo I. , LLuis J. , Fité B. , Paseiro-Losada P. , Cruz J. M. 2015 Brewery waste as a potential source of phenolic compounds: optimisation of the extraction process and evaluation of antioxidant and antimicrobial activities Food Chem. 145 191 - 197
Bekhit A. D. , Geesink G. H. , Ilian M. A. , Morton J. D. , Sedcole R. , Bickerstaffe R. 2003 Particulate metmyoglobin reducing activity and its relationship with meat color J. Agric. Food Chem. 51 6026 - 6035    DOI : 10.1021/jf030093e
Brewer M. S. , Jensen J. , Sosnicki A. A. , Fields B. , Wilson E. , McKeith F. K. 2002 The effect of pig genetics on palatability, color and physical characteristics of fresh pork loin chops Meat Sci. 61 249 - 256    DOI : 10.1016/S0309-1740(01)00190-5
Calvo M. M. , Garciia M. L. , Selgas D. M. 2008 Dry fermented sausages enriched with lycopene from tomato peel Meat Sci. 80 167 - 172    DOI : 10.1016/j.meatsci.2007.11.016
Camo J. , Lorés A. , Djenane D. , Beltrán J. A. , Roncalés P. 2011 Display life of beef packaged with an antioxidant active film as a function of the concentration of oregano extract Meat Sci. 88 174 - 178    DOI : 10.1016/j.meatsci.2010.12.019
Carpenter R. , O’Grady M. N. , O’Callaghan Y. C. , O’Brien N. M. , Kerry J. P. 2007 Evaluation of the antioxidant potential of grape seed and bearberry extracts in raw and cooked pork Meat Sci. 76 604 - 610    DOI : 10.1016/j.meatsci.2007.01.021
Chu Y. F. , Sun J. , Wu X. , Liu R. H. 2002 Antioxidant and antiproliferative activities of common vegetables J. Agric. Food Chem. 50 6910 - 6916    DOI : 10.1021/jf020665f
Conway E. J. 1950 Microdiffusion and volumetric error 3rd ed. Crosby Lockwood and Son Ltd London, UK 87 - 107
Dave D. , Ghaly A. E. 2011 Meat spoilage mechanisms and preservation techniques: A critical review Am. J. Agric. Biol. Sci. 6 486 - 510    DOI : 10.3844/ajabssp.2011.486.510
Du M. , Ahn D. U. 2002 Effect of antioxidants on the quality of irradiated sausages prepared with turkey thigh meat Poultry Sci. 81 1251 - 1256    DOI : 10.1093/ps/81.8.1251
Fraqueza M. J. , Ferreira M. C. , Barreto A. S. 2008 Spoilage of light (PSE-like) and dark turkey meat under aerobic or modified atmosphere package: Microbial indicators and their relationship with total volatile basic nitrogen Br. Poultry Sci. 49 12 - 20    DOI : 10.1080/00071660701821675
Han K. H. , Choi I. S. , Lee C. H. 2006 The physico-chemical and storage characteristics of sausage added mugwort powder Korean J. Food Sci. An. 26 356 - 361
Hemilä H. , Kaprio J. , Albanes D. , Virtamo J. 2006 Physical activity and the risk of pneumonia in male smokers administered vitamin E and beta-carotene Int. J. Sports Med. 27 336 - 341    DOI : 10.1055/s-2005-865670
Hu M. , McClements D. J. , Decker E. A. 2004 Antioxidant activity of a proanthocyanidin-rich extract from grape seed in whey protein isolate stabilized algae oil-in-water emulsions J. Agric. Food Chem. 52 5272 - 5276    DOI : 10.1021/jf049486j
Jay J. M. 1992 Modern Food Microbiology Fourth Edition Van Nostrand Reinhold New York 701 -
Jo C. , Son J. H. , Son C. B. , Byun M. W. 2003 Functional properties of raw and cooked pork patties with added irradiated, freeze-dried green tea leaf extract powder during storage at 4℃ Meat Sci. 64 13 - 17    DOI : 10.1016/S0309-1740(02)00131-6
Karre L. , Lopez K. , Getty K. J. 2013 Natural antioxidants in meat and poultry products Meat Sci. 94 220 - 227    DOI : 10.1016/j.meatsci.2013.01.007
Killinger K. M. , Calkins C. R. , Umberger W. J. , Feuz D. M. , Eskridge K. M. 2004 Consumer visual preference and value for beef steaks differing in marbling level and color J. Anim. Sci. 82 3288 - 3293
Kim I. S. , Jin S. K. , Yang M. R. , Chu G. M. , Park J. H. , Rashid R. H. , Kim J. Y. , Kang S. N. 2013 Efficacy of tomato powder as antioxidant in cooked pork patties Asian-Australas. J. Anim. Sci. 26 1339 - 1346    DOI : 10.5713/ajas.2013.13079
Loizzo M. R. , Tundis R. , Menichini F. , Duthie G. 2015 Anti-rancidity effect of essential oils, application in the lipid stability of cooked turkey meat patties and potential implications for health Int. J. Food Sci. Nutr. 66 50 - 57    DOI : 10.3109/09637486.2014.953454
Matsumoto M. , Hiramatsu R. , Yamada K. , Suzuki M. , Miwa Y. , Yabutani M. , Nagai Y. , Tsuchiya M. , Noda M. , Nagata A. , Kawakami K. , Shima T. , Tatsumi N. , Minagawa H. 2013 Phenotypic and genetic analyses of Campylobacter jejuni Lior serotype 76 isolated from chicken meat and clinical specimens Jpn. J. Infect. Dis. 66 72 - 75    DOI : 10.7883/yoken.66.72
Millar S. J. , Moss B. W. , Stevenson M. H. 2000 The effect of ionising radiation on the colour of beef, pork and lamb Meat Sci. 55 349 - 360    DOI : 10.1016/S0309-1740(99)00164-3
Mitropoulou G. , Fitsiou E. , Stavropoulou E. , Papavassilopoulou E. , Vamvakias M. , Pappa A. , Oreopoulou A. , Kourkoutas Y. 2015 Composition, antimicrobial, antioxidant, and antiproliferative activity of Origanum dictamnus (dittany) essential oil Microb. Ecol. Health Dis. 26 26543 -
Mitsumoto M. , O’Grady M. N. , Kerry J. P. , Joe Buckley D. 2005 Addition of tea catechins and vitamin C on sensory evaluation, colour and lipid stability during chilled storage in cooked or raw beef and chicken patties Meat Sci. 69 773 - 779    DOI : 10.1016/j.meatsci.2004.11.010
Movileanu I. , Máryuri T. , Brian H. , Rhonda K. M. , Jimmy T. K. 2013 Comparison of Dried Plum Puree, Rosemary Extract, and BHA/BHT as Antioxidants in Irradiated Ground Beef Patties Int. J. Food Sci. 2013 7 -
Nam K. C. , Ahn D. U. 2002 Carbon monoxide-heme pigment is responsible for the pink color in irradiated raw turkey breast meat Meat Sci. 60 25 - 33    DOI : 10.1016/S0309-1740(01)00101-2
Negro C. , Tommasi L. , Miceli A. 2003 Phenolic compounds and antioxidant activity from red grape marc extracts Bioresour. Technol. 87 41 - 44    DOI : 10.1016/S0960-8524(02)00202-X
Nissen L. R. , Byrne D. V. , Bertelsen G. , Skibsted L. H. 2004 The antioxidative activity of plant extracts in cooked pork patties as evaluated by descriptive sensory profiling and chemical analysis Meat Sci. 68 485 - 495    DOI : 10.1016/j.meatsci.2004.05.004
Pandey K. B. , Rizvi S. I. 2009 Plant polyphenols as dietary antioxidants in human health and disease Oxid. Med. Cell. Longev. 2 270 - 278    DOI : 10.4161/oxim.2.5.9498
Parlak O. , Zorba O. , Kurt S. 2011 Modelling with response surface methodology of the effects of egg yolk, egg white, and sodium carbonate on some of the physical-chemical and sensory properties of beef patties Int. J. Food Eng. 51 780 - 784
Pazos M. , Gallardo J. M. , Torres J. L. , Medina I. 2005 Activity of grape phenols as inhibitors of the oxidation of fish lipids and frozen fish muscle Food Chem. 92 547 - 557    DOI : 10.1016/j.foodchem.2004.07.036
Radha Krishnan K. , Babuskin S. , Azhagu Saravana Babu P. , Sasikala M. , Sabina K. , Archana G. , Sivarajan M. , Sukumar M. 2014 Antimicrobial and antioxidant effects ofspice extracts on the shelf life extension of raw chicken meat Int. J. Food Microbiol. 171 32 - 40    DOI : 10.1016/j.ijfoodmicro.2013.11.011
Robbins K. , Jensen J. , Ryan K. J. , Homco-Ryan C. , McKeith F. K. , Brewer M. S. 2003 Consumer attitudes towards beef and acceptability of enhanced beef Meat Sci. 65 721 - 729    DOI : 10.1016/S0309-1740(02)00274-7
Rojas M. C. , Brewer M. S. 2007 Effect of natural antioxidants on oxidative stability of cooked, refrigerated beef and pork J. Food Sci. 72 S282 - S288    DOI : 10.1111/j.1750-3841.2007.00335.x
Sasse A. , Colindres P. , Brewer M. S. 2009 Effect of natural and synthetic antioxidants on the oxidative stability of cooked, frozen pork patties J. Food Sci. 74 S30 - S35    DOI : 10.1111/j.1750-3841.2008.00979.x
Shah M. A. , Bosco S. J. , Mir S. A. 2014 Plant extracts as natural antioxidants in meat and meat products Meat Sci. 98 21 - 33    DOI : 10.1016/j.meatsci.2014.03.020
Shi J. , Yu J. , Pohorly J. E. , Kakuda Y. 2003 Polyphenolics in grape seeds-biochemistry and functionality J. Med. Food 6 291 - 299    DOI : 10.1089/109662003772519831
Sivarooban T. , Hettiarachchy N. S. , Johnson M. G. 2007 Inhibition of Listeria monocytogenes using nisin with grape seed extract on turkey frankfurters stored at 4 and 10 degrees C J. Food Prot. 70 1017 - 1020
Valenzuela Melendres M. , Camou J. P. , Torrentera Olivera N. G. , Alvarez Almora E. , González Mendoza D. , Avendaño Reyes L. , González Ríos H. 2014 Response surface methodology for predicting quality characteristics of beef patties added with flaxseed and tomato paste Meat Sci. 97 54 - 61    DOI : 10.1016/j.meatsci.2014.01.007
Weber G. M. , Antipatis C. 2001 Pork meat quality and dietary vitamin E Second International Virtual Conference on Pork Quality
Widsten P. , Cruz C. D. , Fletcher G. C. , Pajak M. A. , McGhie T. K. 2014 Tannins and extracts of fruit byproducts: antibacterial activity against foodborne bacteria andantioxidant capacity J. Agric. Food Chem. 62 11146 - 11156    DOI : 10.1021/jf503819t
Witte V. C. , Krause G. F. , Bailey M. E. 1970 A new extraction method for determining 2-thiobarbituric acid values for pork and beef during storage J. Food Sci. 35 585 - 592    DOI : 10.1111/j.1365-2621.1970.tb04816.x
Wood J. E. , Senthilmohana S. T. , Peskinb A. V. 2002 Antioxidant activity of procyanidin-containing plant extracts at different pHs Food Chem. 77 155 - 161    DOI : 10.1016/S0308-8146(01)00329-6