Identificador persistente para citar o vincular este elemento: http://hdl.handle.net/10553/60153
Título: Use of glycerol and propylene glycol as additives in heat-treated goat colostrum
Autores/as: Morales De La Nuez, Antonio José 
Hernández Castellano, Lorenzo Enrique 
Moreno Indias, I.
Sánchez Macías, D.
Argüello Henríquez, Anastasio 
Castro Navarro, Noemí 
Clasificación UNESCO: 330914 Elaboración de alimentos
310101 Productos lácteos
Palabras clave: Sanitization
Passive immune transfer
Pasteurization
Dairy goat
Fecha de publicación: 2020
Publicación seriada: Journal of Dairy Science 
Resumen: This experiment aimed to evaluate the suitability of glycerol and propylene glycol to reduce microbial count and preserve immune properties in heat-treated goat colostrum. Colostrum samples from 11 goats were each divided into 9 aliquots. Different concentrations (2, 6, 10, and 14%; vol/vol) of either glycerol or propylene glycol were added to the aliquots. Phosphate buffer solution was added to one aliquot, which was set as the control (CG). After the respective additions, all colostrum samples were heat treated at 56°C for 1 h. After cooling, aerobic mesophilic bacteria were cultured. The samples were frozen until free fatty acid, IgG, IgA, and IgM concentrations and chitotriosidase activity were measured. No differences were found in aerobic mesophilic bacteria counts between either 10 or 14% glycerol and propylene glycol additives. These additions reduced bacterial count to a greater extent than CG, and 2 or 6% additions. Colostrum IgG concentration was not affected by either of the additives or their concentrations. The propylene glycol additive reduced IgA and IgM concentrations and chitotriosidase activity, compared with CG. Conversely, glycerol did not affect any of the studied immune variables. In conclusion, glycerol addition to goat colostrum before heat treatment is suitable to enhance bacterial reduction, whereas colostrum immune properties were not affected.
ISSN: 0022-0302
DOI: 10.3168/jds.2019-17535
Fuente: Journal of Dairy Science [ISSN 0022-0302], v. 103(3), p. 2756-2761, (Marzo 2020)
Colección:Artículos
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