2015, Number 3
Preservación de leche cruda en sistemas de producción familiar (Altos de Jalisco) mediante el uso campos magnéticos
González-Ruiz S, Milián-Suazo F, Herrera-Rodríguez SE
Language: Spanish
References: 13
Page: 150-157
PDF size: 256.81 Kb.
ABSTRACT
The dairy industry has been always interested in finding new methods to preserve milk and milkderived products in good conditions. These methods are required to improve hygiene and safety, to increase shelf life and to keep natural flavor. Due to economic and/or geographic reasons, it is not always possible to use refrigeration for milk preservation, either by the lack of cooling systems, defective systems or high cost. Therefore, new methods to preserve raw milk are always required. Objective: The aim of this study was to evaluate the effect of magnetic fields as an alternative method to preserve raw milk on family-run low-technology dairy farms from Los Altos de Jalisco, Mexico. Methodology: Three milk samples were taken from three different herds. Each sample was split into three aliquots and a different treatment of magnetic field was applied to each: one with no treatment as a control, one with a high intensity doses of magnetic field (11,700 G) and one with a low intensity (3,800 G). Treatment was for three hours. The response variables were: pH, acidity (°D) and bacterial colony forming units per milliliter (UFC´s/mL). Results: No significant difference (p›0.05) between treatments for CFU´s/ mLwas observed; however, some treatments showed considerable less CFU´s after treatment. Significant difference (p‹0.05) between treatments was observed for pH, suggesting changes in some of the milk characteristics during treatment. Conclusions: This study opens the opportunity for new studies in which adjustments to the different treatments could provide better results.REFERENCES
Signorini, ML, Sequeira, GJ, Bonazza, JC, Dalla-Santina, R, Otero, JL, y Rosmini, MR. 2003. Variación estacional en los principales indicadores de higiene en leche cruda de un tambo de la cuenca central. Departamento de Salud Pública Veterinaria, Facultad de Ciencias Veterinarias. Revista FAVECiencias Veterinarias 2 (2) ISSN.