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166ALTHAUS, RL. • MOLINA, M.P. • CORMAN, I.M. • FERNÁNDEZ, N. & RODRÍGUEZ, M.raza Manchega fue para la enzima LP de 3,46 U/L(+ 3,53), del ión tiocianato de 6,89 mg/l (+ 3,18) ydel H 2 O 2 de 0,39 mg/l ( + 0,26).Se concluye que las concentraciones encontradasen este estudio referentes al H 2 O 2 y SCN - resultaninsuficientes para activar al sistema lactoperoxidasa,por lo que no podría ejercer su acción antimicrobianoen forma natural.REFERENCIAS BIBLIOGRÁFICASBANKS, J.G.; BOARD, R.G., 1985. Preservationby the lactoperoxidase aystem (LP-S) of thecontaminated infant milk formula. Letters inApplied Microbiology, 1, 81-85BJOERCK, L.; CLAESSON, O., 1980.Correlation between concentration of hypothiocyanateand antibacterial effect of the lactoperoxidasesystem. Journal of Dairy Science, ,63, 919-922.MEE, J.F., 1994. The nutraceutical properties ofmilk. Irish Veterinary Journal, 47, 172-174.MEDINA, M.; GAYA, P.; NUÑEZ, M., 1989. Thelactoperoxidase system in ewe’s milk: levels oflactoperoxidase and thiocyanate. Letters inApplied Microbiology, 8, 147-149.MOTTOLA, H., SIMPSON, B.E.; GORIN, G.,1970. Absortion determination of hydrogenperoxide in submicrogram amounts with leucocrystal violet and peroxidase as catalyst.Analytical Chemistry. 42 (3), 410-411.PRUITT, K.M.; KAMAU, D.N., 1993. Quantitativeanalysis of bovine lactoperoxidase systemcomponents and of the effects of the activatedsystem on bacterial growth and survival. FILBoletin 283, 72-86.SANTOS, J.A.; LÓPEZ-DÍAZ, T.M.; GARCÍA-FERNÁNDEZ, M.C.; GARCÍA-LÓPEZ, M.L.;OTERO, A., 1994. Antibacterial effect of thelactoperoxidase system against aeromonashydrophila and psychrotrophs durong the manufacturingof the Spanish sheep fresh cheeseVillalón. Milchwissenschaft, 50, 690-692.SAS ® User guide statistics. Version 6.12. Edición1996. SAS Institut. Cary,NC.WOLFSON, L.M.; SUMNER, S.A., 1993.Antibacterial activity of the lactoperoxidase system:A review. Journal of Food Protection, 56,887-892.ZAPICO, P.; GAYA, P.;DE PAZ, M.; NUÑEZ, M.;MEDINA, M., 1991. Influence of breed, animaland days of lactation on lactoperoxidase systemcomponents in goat milk, Journal of DairyScience, 74, 783-787.

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