Publications by authors named "A M Yepez"

Lactic acid bacteria (LAB) are indigenous microorganisms that have been involved in food fermentations throughout history to preserve food and also to give special characteristics to them. The traditional fermented foods that are still being elaborated in indigenous populations around the world are a potential source of LAB with important biotechnological properties and/or beneficial to health. In a previous work, LAB biodiversity associated with , a traditional maize-based fermented beverage from Northwestern Argentina, was studied, both by culture dependent and independent methods.

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Some strains of lactic acid bacteria (LAB) produce riboflavin, a water-soluble vitamin of the B complex, essential for human beings. Here, we have evaluated riboflavin (B2 vitamin) production by five strains isolated from , a traditional maize-based fermented alcoholic beverage from north-western Argentina and their isogenic riboflavin-overproducing derivatives previously selected using roseoflavin. A direct fluorescence spectroscopic detection method to quantify riboflavin production in bacterial culture supernatants has been tested.

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Article Synopsis
  • Cacao (Theobroma cacao L.) is an economically significant crop, with its domestication history and early uses still not fully understood.
  • Studies show that while Mesoamerica is traditionally seen as the birthplace of cacao, genetic evidence indicates that the upper Amazon in northwest South America has the highest diversity of cacao, suggesting it may be the origin.
  • Recent archaeological findings from a site in southeast Ecuador reveal the earliest known use of cacao, dating back about 5,300 years, indicating this region as the first known centre of cacao domestication in the Americas.
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Background: Personality has been recognized as a key variable in the prediction of treatment adherence and health care behaviors in patients living with chronic diseases.

Purpose: In order to contribute to the prediction of treatment-adherence behaviors among HIV-positive patients, this study aimed to test the metric properties of the 12-item Stress-Related Situations Scale (SRSS-12), which assesses four interactive styles of personality related to stressful situations when receiving treatment for a chronic disease.

Patients And Methods: This cross-sectional study was performed with a nonprobability sampling between May and June 2016.

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Cereal-based functional beverages represent social, economic, and environmental sustainable opportunities to cope with emerging trends in food consumption and global nutrition. Here we report, for the first time, the polyphasic characterization of three cereal-based kefir-like riboflavin-enriched beverages, obtained from oat, maize and barley flours, and their comparison with classical milk-based kefir. The four matrices were successfully fermented with commercial starters: i) milk-kefir and ii) water-kefir, proving the potential of cereal ingredients in the formulation of dairy-like fermented beverages with milk-kefir starter behavior better in these matrices.

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