Уральский государственный лесотехнический университет
Екатеринбург, Свердловская область, Россия
The use of modern technologies in meat production often leads to the formation of raw meat with uncharacteristic course of autolysis, one raw meat being characterized by a low pH value (less than 5.2), it is pale, flabby and watery (Pale, Soft, Exudative (PSE) with a loose consistency. Meat juice is allocated and meat has a sour smell. Other meat has a high ultimate pH (more than 6.2), it is dark, tough and dry (Dark, Firm, Dry (DFD) with coarse fiber and sticky. One of the quality indices enabling to identify meat into PSE and DFD groups is color. The pH of meat correlates with the loss of meat juice and color. Pork protein with PSE defect is characterized by a small amount of fractions with a high molecular weight and a large proportion of protein fractions with the molecular weight from 100 to 50 kDa. During meat production the technological solution for the rational use of raw meat with deviations in the autolysis process can be modes of heat treatment and the use of food additives. Stress causes a significant impact on the meat quality of slaughtered animals. The appearance of meat with PSE quality is associated with the animal susceptibility and its response to the stressful situation, and the specificity of biochemical processes in pork is caused by the development of a stress syndrome PSS (Porcine Stress Syndrome), the syndrome of poor adaptation. The meat quality is affected by breed, for example, hybrid pigs are superior to pure bred in technological properties and meat productivity. The meat of pigs of large white x Landrace x Duroc refers to NOR meat, which makes it more valuable. Due to the fact that the susceptibility of pigs to stress is inherited as a single recessive gene, the pigs are divided by genotype into two groups: stress sensitive and stress resistant. It has been shown that the activity of antiperoxide enzymes is higher in stress resistant broiler chickens than in stress sensitive ones.
Meat quality, reasons of forming the nontraditional meat quality, autolysis, antioxidant system, lipid peroxidation
INTRODUCTION
Modern technologies of feeding cattle and pigs en-able to provide the realization of a genetic potential of meat productivity [1]. But during the intensification of livestock there appear some problems connected with the formation of raw meat with uncharacteristic course of autolysis, in particular, with a low pH value (less than 5.2). Such meat is pale, flabby and watery (Pale, Soft, Exudative (PSE) with a loose consistency, meat juice allocation and sour smell. The meat with a high ultimate pH (more than 6.2) is dark, tough and dry (Dark, Firm, Dry (DFD) with coarse fiber and sticky. [2] notices that the realization of pale, soft and exudative pork leads to the annual loss of $100 million for pig-breeding.
Characteristics, formation reasons and the ra-tional use of raw meat with PSE and DFD properties
The important identified index of meat with uncha-racteristic course of autolysis is color which signifi-cantly affects the other characteristics and culinary and technological properties. Dark color is typical for DFD meat and the consumers consider it of poor quality by the visual observation.
[3] states that the index of light meat depends on the content of common pigments and the surface condition, and the yellowness and redness of meat depend on the ratio of myoglobin derivatives. Myoglobin in contact with the air oxygen turns into oxymyoglobin (MbO) which gives bright pink meat. Metmyoglobin (MetMb) is formed under the influence of light and air and meat acquires brown-grey color which indicates DFD evidence. It has been established that lightness of meat is a more stable parameter, less subjected to the action of external factors. Hence, it is more objective when determining raw meat into the definite quality group.
[4] recommends to break up meat into quality groups using the lightness index L, the value of which correlates with the change of pH value and the quantity of heme meat proteins. The scale "lightness pH24" has been proposed to identify the quality group of beef. The complex of pH indices, lightness (L) and redness index «А/В» can be used in addition to it.
1. Ivanov, S., Kyshenko, I., and Kryzhova, Yu., Issledovanie kachestvennyh pokazatelei syr’ya myasopererabaty-vayushchei otrasli Ukrainy (Research of qualitative indices of raw materials in meat processing industry in Ukraine), Food Chemistry and Technology, 2013, vol. 47, no. 1, P. 58.
2. Channon, H.A., et al., Comparision of CO2 stunning with mannal electrical stunning (50 Hz) of pigs on carcass and meat quality, Meat science, 2012, P. 65.
3. Wu, T.A., Pham, T.T., and Gabaraev, A.N., Vzaimosxyaz’ tsvetovyh i spektral’nyh harakteristik NOR, PSE, DFD svininy (The relationship of color and spectral characteristics of NOR-, PSE-, DFD-pork), Myasnaya industriya (Meat Industry), 2009, no. 6, pp. 33-34.
4. Gurinovich, G.V., Teoreticheskoe i eksperimental’noe obosnovanie pritsipov ispol’zovaniya netraditsionnyh vidov syr’ya i tehnologii produktov. Diss. dokt. tekhn. nauk (Theoretical and experimental foundation of principles of us-ing the alternative raw materials and technology of products. Dr. tech. sci. diss.), Kemerovo, 2006, 474 p.
5. Gerhard von Lengerken, Steffen Maak, and Michael Wicke, Muscle metabolism and meat quality of pigs and poultry, Veterinariya ir zootechnika, 2002, vol. 20, Р. 42.
6. Bazhov, G.M., Kryshtop, E.A., and Baranikov, F.I., Tehnologicheskaya harakteristika svininy s porokami PSE i DFD (Technological characteristics of pork with PSE and DFD defects), Scientific Journal KubGAU, 2013, no. 9, P. 35.
7. Van de Perre, V., Ceustermans, A., Leyten, J., and Geers, R., The prevalence of PSE characteristics in pork and cooked ham - Effects of season and lairage time, Meat science, 2010, pp. 391-397.
8. Tatulov, Yu.V., Kosacheva, T.V., Kuznetsova, S.A., Antonova, E.N., and Voskresenskiy, S.B., Vliyanie stressa svinei na kachestvo myasnogo syr’ya (The effect of pig stress on the quality of meat raw materials), Myasnaya indus-triya (Meat Industry), 2009, no. 7, pp. 54-56.
9. Wicke, M., Lengerken, G., Maak, S., Fiedler, I., Vorhersage von PSE- Fleisch mittels biochemischer und orpholo-gischer Merkmale der Skelettmuskulatur am lebenden Schwein, Arch Tierzucht, 1993, pp. 631-638.
10. Fiedler, I., Ender, K., Wicke, M., Maak, S., Lengerken, G., and Meyer, W., Structural and functional characteristics of muscle fibres in pigs with different malignant hyperthermia susceptibility [MHS] and different meat quality, Meat science, 1999, pp. 9-15.
11. Maria Pilar Perez, Influence of lairage time on some welfare and meat quality parameters in pigs./ Maria Pilar Pe-rez, Jorge Palacio, Maria Pilar Santolaria, Maria del Carmen Acena, Gema Chacon, Maria Teresa Verde, Jorge Hu-go Calvo, Maria Pilar Zaragoza, Manuel Gascon, Sylvia Garcia-Belenguer// 2002, no. 33. pp. 239-250.
12. Zharinov, A.I., Seregin, I.G., and Rezvykh, A.V., Opredelenie svezhesti i bezopasnosti myasnogo syr’ya (Definition of raw meat freshness and safety), Myasnaya industriya (Meat Industry), 2013, no. 2, pp. 12-15.
13. Zenkov, K.S., Losmakova, S.I., and Kovaleva, Z.I., Vliyanie stressa na biohimicheskie pokazateli krovi svinei (Ef-fect of stress on biochemical parameters of pig blood), K.S. Zenkov, Nauchnye osnovy razvitiya zhivotnovodstva v SSSR (Scientific bases of livestock development in the USSR), Kiev, Urozhai, 1979, vyp.9, pp.14-16.
14. Shipulin, V.I., Printsipy razrabotki al’ternativnyh variantov ratsional’nyh tehnologii myasnyh produktov novogo pokoleniya s adaptirovannymi pishchevymi dobavkami (Principles of the development of alternative variants of ra-tional technologies of meat products of new generation with adapted food additives), Avt. diss. Dr. technical sciences, Stavropol, 2009, 44 p.
15. Lisitsyn, A.B., Tehnologicheskie aspekty povysheniya ekzotroficheskoi effektivnosti promyshlennoi pererabotki myasnogo syr’ya (Technological aspects of increasing the exotrophic efficiency of the industrial processing of raw meat), diss. in the form of a scientific report for Dr. of technical science, Moscow, 1997, P. 69.
16. Shalimova, O.A., and Radchenko, M.V., Izmenenie summarnoi belkovoi fraktsii myshechnoi tkani myasa svininy s bio- i fiziko-himicheskoi spetsifikoi v protsesse varki pri razlichnyh temperaturah (The change of total protein fraction of muscle tissue of pork with biological and physico-chemical characteristics in the process of cooking at different temperatures), Russian Journal of Agricultural and Socio-Economic Scienses, 2012, no. 3, P. 57.
17. Chernuha, I.M., Shalimova, O.A., and Radchenko, M.V., Transformatsiya miofibrillyarnyh i sarkoplazmaticheskih belkov PSE-svininy pri termoobrabotke (Transformation of myofibrillar and sarcoplasmic proteins of PSE-pork during heat treatment), Myasnaya industriya (Meat Industry), 2013, no. 5, pp. 24-27.
18. Bulychev, I.N., Pishchevye ingredienty dlya ispol’zovaniya myasnogo syr’ya s priznakami PSE i DFD (Food ingre-dients for the use of raw meat with PSE and DFD signs), Myasnaya industriya (Meat Industry), 2010, no. 5, pp. 52-53.
19. Komarova, Yu.V., and Kovalev, O.A., Produktivnost’ i myasnye kachestva svinei v zavisimosti ot ratsionov kor-mleniya (Productivity and meat quality of pigs depending on feeding), Myasnaya industriya (Meat Industry), 2014, no. 8, pp. 56-57.
20. Jorge A. Correa., Gonyou Harold, Torrey Stephanie, Widowski Tina, Bergeron Renee, Crowe Trever, Laforest Jean-Paul, Faucitano Luigi, Welfare of Pigs Being Transported over Long Distances. Using a Pot-Belly Trailer during Winter and Summer, Animals, 2014, no. 4, pp. 200-213.
21. Kudryashov, L.S., and Kudryashova, O.A., Vliyanie stressa zhivotnyh na kachestvo myasa (The effects of animal stress on the meat quality), Myasnaya industriya (Meat Industry), 2012, no. 1, pp. 18-21.
22. Kauffman, R.G., Cassens, R.G., Scherer, A., and Meeker, D.L., Variations in pork quality, National Pork Producer Council Publications, 1992, pp. 185-186.
23. Albrecht, V., Ritz, O., Linder S., and Harter, K., The NAF domain defines a novel protein interaction module con-served in Ca2+-regulated kinases, Kudla J., 2001, pp. 89-90.
24. Pardo-Gonzalez, J.E., Perez-Sempere, Quality control in the meat industry. Application of the HAASSP system in the manufacturing line of fresh sausages, Food Technology, Ital. Process and package, 2000, vol. 19, pp. 21-27.
25. Kolomiets, N.N., Kompleksnaya otsenka kachestva myasnogo syr’ya, poluchennogo ot svinei raznyh genotipov s tsel’yu opredeleniya promyshlenno prigodnyh genotipov. Diss. dokt. tekhn. nauk (Comprehensive assessment of the quality of raw meat produced from pigs of different genotypes in order to determine the industrially suitable genotypes. Dr. techn. sci. diss.), Moscow, 2006. 145 p.
26. Cooper, C.C., et al., Capillary distribution and tiber characteristics in skeletal muscle of stress - suneptible animal, I.Food Sci., 1989, P. 25.
27. Fujii J., Otsu K., Zorzato F., de Leon S., Khana U.K., Weiler J.E., O’Brien P.J., MacLennan H.D., Identification of a mutation in porcine ryanodine receptor associated with malignant hyperthermia, Science, 1991, pp. 448-451.
28. Klont, R.E., Effect of dantrolene treatment on muscle metabolism and meat quality of anesthetized pigs of different halothane genotypes, 1994, pp. 51-53.
29. Abuja, Р.М. Clin. Chim. Acta. / P.M.Abuja, R.Albertini, 2001, no. 1, Р. 306.
30. Budnikov, G.K., Problemy analiticheskoy khimii. Tom 11. Khimicheskiy analiz v meditsinskoy diagnostike (Prob-lems of Analytical Chemistry. Vol 11. Chemical analysis in medical diagnostics), Moscow: Nauka, 2010, vol. 11. 504 p.
31. Zenkov, N.K., Lankin, V.Z., and Menshikova, E.B., Okislitel’nyi stress (Oxidative stress), Moscow: MAIK "Nau-ka/Interperiodica", 2001. 343 p.
32. Yankovskiy, O.A., Toksichnost’ kisloroda i biologicheskie sistemy (evolyutionnye, ekologicheskie i medico-biologicheskie aspekty) (Oxygen toxicity and biological systems (evolutionary, ecological and medical-biological aspects), St. Petersburg: Igra Publ., 2000. 294 p.
