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Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus
Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus
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Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus
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Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus
Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus

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Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus
Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus
Journal Article

Effect of Storage Temperature and Substrate on the Survival of Encapsulated Lactobacillus acidophilus

2024
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Overview
Lactic acid bacteria (LAB) are widely used in fermentation in the food industry and silage for animal feed. Environmental factors such as temperature affect the survival of microorganisms in food and silage. Encapsulation technologies preserve the integrity of encapsulated microorganisms, protecting them from adverse environmental conditions. The present work examined the effect of three storage temperatures, room (25 °C), refrigeration (4 °C), and freezing (-18 °C), in the presence of three substrates (glucose, whey, or distilled water) on the survival of alginate-encapsulated Lactobacillus acidophilus through CFU counting. The results showed that encapsulated L. acidophilus stored at 4 °C exhibited CFU values ​​between 0.61 and 0.99 for 80 days, these being the highest, while room temperature obtained the lowest CFU, with values ​​between 0.312 and 0.93. Encapsulated L. acidophilus in the presence of whey and glucose showed a higher number of CFU, with values ​​between 0.53 and 1, throughout the storage time, compared to those in distilled water, whose values ​​were between 0.3 and 0.99. Glucose and serum are suitable for growing encapsulated L. acidophilus at room, refrigeration, and freezing temperatures for 90 days of storage. Regardless of the culture medium, freezing temperature is appropriate for storing L. acidophilus for long periods. Las bacterias lácticas (BAL) son de amplio uso en fermentaciones de la industria alimenticia y en ensilajes para alimentación animal. Sin embargo, la supervivencia de los microorganismos en los alimentos y en ensilajes se ve afectada por factores ambientales como la temperatura. Por consiguiente, la exploración de tecnologías de encapsulación permitiría preservar la integridad de los microorganismos encapsulados al protegerlos de las condiciones adversas del entorno. En el presente trabajo se examinó el efecto de tres temperaturas de almacenamiento: ambiente (25 °C), refrigeración (4 °C) y congelación (-18 °C), en presencia de tres sustratos: glucosa, suero de leche o agua destilada en la supervivencia de Lactobacillus acidophilus encapsulado en alginato a través del conteo de las UFC. Los resultados mostraron que L. acidophilus encapsulado y almacenado a 4 °C presentó valores de UFC entre 0,61 y 0,99 durante 80 días, siendo estos los más altos, mientras que la temperatura ambiente presentó los menores números de UFC, con valores entre 0,312 y 0,93, siendo estos los más bajos entre las tres temperaturas analizadas. L. acidophilus encapsulado en presencia de suero de leche y glucosa mostró mayor número de UFC, con valores entre 0,53 y 1, a lo largo del tiempo de almacenamiento, en comparación con aquellos en presencia de agua destilada, cuyos valores estuvieron entre 0,3 y 0,99. La glucosa y el suero son los medios adecuados para el cultivo de L. acidophilus encapsulado a temperaturas ambiente, de refrigeración y de congelación durante 90 días de almacenamiento. Independiente del medio de cultivo, la temperatura de congelación es la adecuada para el almacenamiento de L. acidophilus durante largos períodos.

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