Observación preliminar sobre la influencia de la presión de homogenización upstream en la estabilidad coloidal de la leche UHT sometida a la prueba de alcohol
| Autor: | Celestino, Jaqueline de Almeida, Stephani, Rodrigo, Wolfschoon Pombo, Alan Frederick, Carvalho, Antônio Fernandes de, Perrone, Ítalo Tuler |
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| Jazyk: | portugalština |
| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Research, Society and Development; Vol. 10 No. 14; e396101419411 Research, Society and Development; Vol. 10 Núm. 14; e396101419411 Research, Society and Development; v. 10 n. 14; e396101419411 Research, Society and Development Universidade Federal de Itajubá (UNIFEI) instacron:UNIFEI |
| ISSN: | 2525-3409 |
| Popis: | The purpose of this work was to study the influence of the upstream homogenization pressure (before heat treatment) on the stability of pasteurized whole milk when submitted to the alcohol test, aiming at UHT processing without the addition of stabilizers. Four different homogenization pressures (0 MPa, 20 MPa, 40 MPa and 80 MPa, in addition to the control treatment) were evaluated at a temperature of 80°C (average homogenization temperature used in the UHT milk industry). Two methods of observation of the colloidal behavior of milk after the alcohol test (ethanol concentrations between 72% (v/v) and 96% (v/v), at 2% (v/v) intervals) were applied: direct visualization and particle size distribution (LS) analysis. The LS results showed that the 0 MPa treatment did not present significant difference (p>0.05) for values of d10 up to 86% alcohol (v/v), thus showing a higher stability when compared to the control treatment (with stability up to 82% (v/v) alcohol). It was found that the stability of the control, 20 MPa and 40 MPa treatments were maintained up to 80% alcohol (v/v) (p>0.05); a distinct behavior was observed in the 80 MPa treatment which presented a statistically significant difference (p0.05) para valores de tamaño de partícula d10 hasta 86% (v/v) de alcohol, mostrando así una mayor estabilidad en comparación con el tratamiento de control (estable hasta ≤ 82% (v/v) de alcohol). Se encontró que la estabilidad de los tratamientos de control a 20 MPa y 40 MPa se mantuvo hasta una concentración de alcohol ≤ 80% de alcohol (v/v) (p>0.05). Un comportamiento distinto fue observado en el tratamiento de 80 MPa, que presentó una diferencia estadísticamente significativa (p0,05) para valores de d10 até o álcool 86% (v/v), mostrando assim uma maior estabilidade quando comparado ao tratamento controle (estável ao álcool ≤ 82% (v/v)). Verificou-se que as estabilidades dos tratamentos controle, 20 MPa e 40 MPa foram mantidas até a concentração do álcool ≤ 80% (v/v) (p>0,05), comportamento distinto ao observado no tratamento 80 MPa que apresentou diferença estatística significativa (p |
| Databáze: | OpenAIRE |
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