Taste quality of monascal adlay.

Researchers used Monascus purpureus to ferment cooked adlay samples. Two types of adlay were tested: polished and dehulled. Nutritional components like ash, fat, and protein were measured. Soluble sugars and polyols were analyzed using standard methods. Free amino acid content was quantified to assess flavor potential. Bitter compounds were compared across all four sample types. The study also looked for 5'-nucleotides, which contribute to umami taste. Data were compared between inoculated and uninoculated controls.

Inoculated adlay samples had higher protein, fiber, and ash content than controls. Fat content was also elevated in the fermented products. Carbohydrate levels were higher in the uninoculated samples. Soluble sugars and polyols were highest in the dehulled and polished controls. MDA and MPA had lower sugar content than their uninoculated counterparts. Free amino acid levels were highest in the inoculated samples. Bitter compounds were more abundant in MDA and MPA than in DA and PA. No 5'-nucleotides were detected in any sample.

Fermentation with Monascus purpureus increased protein and fiber in adlay. Bitter compounds were more concentrated in the inoculated samples. This suggests that monascal adlay may have a bitter taste profile. The absence of 5'-nucleotides indicates no umami contribution. Carbohydrate content was higher in the uninoculated samples. The study highlights differences between polished and dehulled adlay. Fermentation altered the flavor compounds in a predictable way. These findings support the idea that monascal adlay products may taste bitter.