Abstract
Entire and castrated ram lambs were slaughtered at 12 and 30 weeks of age. Lean tissue from the M. semimembranosus muscle and adipose tissue from the muscle region were recovered. Headspace volatiles, total volatiles, phenols, and free fatty acids were analyzed. Seventy-one compounds were reported as components of lamb aroma for the first time, including 4,6-dimethyl-1,3-oxathiane. Indole, 3-methylindole (skatole) and thiophenols were identified only in tissue from entire animals. Levels of certain alkylphenols and branched chain fatty acids increased with entirety and slaughter age. 3-Methylindole and several of the phenols and branched chain fatty acids identified have been associated with the undesirable note of cooked sheepmeat, while indole has been implicated in boar taint and is reported as a component of sheepmeat for the first time. Sensory analysis revealed that sheepmeat possessed lamby-meaty aromas combined with undesirable odors. An unpleasant odor, described by the attribute `farmyard’, was detected by panelists in samples of mixed lean and adipose tissue and was significantly higher in meat from entires. The increased level of unpleasant odor attributes of entires, especially those slaughtered at 30 weeks, could be due to higher amounts of indoles, branched chain fatty acids and phenols in those samples
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References
Baines, D.A.; Mlotkiewicz, J.A. The chemistry of meat flavour. In Recent Advances in the Chemistry of Meat; Bailey, A.J.; Ed.; Royal Society of Chemistry: Cambridge, UK, 1984; pp. 119–164
Brennand, C.P.; Lindsay, R.C. Influence of cooking on concentrations of species-related flavor compounds in mutton. Lebensm.-Wiss. u.-Technol 1992, 25, 357–364
Brennand, C.P.; Ha, J.K.; Lindsay, R.C. Aroma properties and thresholds of some branched-chain and other minor volatile fatty acids occurring in milkfat and meat lipids. J. Sensory Studies 1989, 4, 105–120
Buttery, R.G.; Ling, L.C.; Teranishi, R.; Mon, T.R.; Roasted lamb fat: basic volatile components. J. Agric. Food Chem 1977, 25, 1227–1229
Buttery, R.G.; Ling, L.C.; Stern, D.J. Studies on popcorn aroma and flavor volatiles. J. Agric. Food Chem 1997, 45, 837–843
Cohen-Tannoudi, J.; Einhorn, J.; Signoret, J.P. Ram sexual pheromone — first approach of chemical identification. Physiol. Behay 1994, 56, 955–961
Crouse, J.D.; Busboom, J.R.; Field, R.A.; Ferrell, C.L. The effects of breed, diet, sex, location and slaughter weight on lamb growth, carcass composition and meat flavor. J. Anim Sci 1981, 53, 376–386
Dransfield, E.; Nute,G.R.; Hogg, B.W.; Walter, B.R. Carcass and eating quality of ram and ewe lambs. Anim. Prod. 1990, 50, 291–299
Garbusov, V.; Rehfeld, G.; Wolm, G.; Golovnja, R.A.; Rothe, M. Volatile sulfur compounds contributing to meat flavor. Part 1. Components identified in boiled meat. Nahrung 1976, 20, 235–241
Griffiths, N.M.; Patterson, R.L.S. Human olfactory responses to 5a-androsten-16-en-3-one—principal component of boar taint. J. Sci. Food Agric. 1970, 21, 4–6
Gurr, M.I.; Harwood, J.L. Lipid Biochemistry. An Introduction, 4thed.; Chapman and Hall: London, UK, 1991
Ha, J.K.; Lindsay, R.C. Distribution of branched-chain fatty acids in perinephric fats of various red meat species. Lebensm.-Wiss. u.-Technol 1990a, 23, 433–440
Ha, J.K.; Lindsay, R.C. Method for the quantitative analysis of volatile free and total branched-chain fatty acids in cheese and milk fat. J. Dairy Sci 1990b, 73, 1988–1999
Ha, J.K.; Lindsay, R.C. Volatile alkylphenols and thiophenol in species-related characterizing flavors of red meats. J. Food Sci. 1991, 56, 1197–1202
Heil, T.P.; Lindsay, R.C. A method for quantitative analysis of flavor-tainting alkylphenols and aromatic thiols in fish. J. Environ. Sci. Health 1988, B23, 475–488
Henderson, D.C. The Veterinary book for Sheep Farmers; Farming Press Books: Ipswich, UK, 1990
Hoffman, G.; Meijboom, P.W. Isolation of two isomeric 2,6-nonadienals and two isomeric 4-heptenals from beef and mutton tallow. J. Amer. Oil Chem. Soc 1968, 45, 468–470
Misock, J.P.; Campion, D.R.; Field, R.A.; Riley, M.L. Palatability of heavy ram lambs. J. Anim Sci 1976, 42, 1440–1444
Patterson, R.L.S. A possible contribution of phenolic components to boar odour. J. Sci. Food Agric 1967, 18, 8–10
Patterson, R.L.S. 5a-Androsten-16-en-3-one: compound responsible for taint in boar fat. J. Sci. Food Agric 1968, 19, 31–38
Sutherland, M.M. 1996. The effect of castration and slaughter age on the aroma of cooked lamb. Ph.D. Dissertation. The University of Reading, UK
Sutherland, M.M.; Ames, J.M. The effect of castration on the headspace aroma components of cooked lamb. J. Sci. Food Agric 1995, 69, 403–413
Sutherland, M.M.; Ames, J.M. Free fatty acid composition of the adipose tissue of intact and castrated lambs slaughtered at 12 and 30 weeks of age. J. Agric. Food Chem 1996a, 44, 3113–3116
Sutherland, M.M.; Ames, J.M. Effect of castration and slaughter age on fatty acids and phenols in sheep adipose tissue. In Flavour Science. Recent Developments; Taylor, A.J.; Mottram, D.S. Eds.; Royal Chemistry Society: Cambridge, UK, 1996b, pp. 19–24
Sutherland, M.M.; MacDougall, D.B.; Ames, J.M. Aroma components of pan-fried lamb. In Trends in Flavour Research; Maarse, H.; van der Heij, D.G. Eds.; Elsevier B.V.: Amsterdam, the Netherlands, 1994,; pp. 157–160
Wong, E.; Nixon, L.N.; Johnson, C.B. Volatile medium chain fatty acids and mutton flavor. J. Agric. Food Chem. 1975, 23, 495–498
Yokoyama, M.T.; Carlson, J.R. Dissimilation of tryptophan and related indolic compounds by ruminai microorganisms in vitro. Appl. Microbiol 1974, 27, 540–548
Young, O.A.; Berdagué, J.L.; Vialon, C.; Rousset-Akrim, S.; Theriez, M. Fat-borne volatiles and sheepmeat odour. Meat Sci 1997, 45, 183–200
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Ames, J.M., Sutherland, M.M. (1999). Effect of Castration and Slaughter Age on the Flavor of Sheepmeat. In: Xiong, Y.L., Chi-Tang, H., Shahidi, F. (eds) Quality Attributes of Muscle Foods. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-4731-0_10
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DOI: https://doi.org/10.1007/978-1-4615-4731-0_10
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