Probiotics are a non-digestible food ingredient that promotes the growth

of beneficial microorganisms in the intestines. One of the functional food ingredients,

Momala corn flour, is a source of prebiotics with a resistant starch content of 4.42%.

Thi s study aimed to improve the prebiotic properties and resistant starch content of

modified corn flour (MCF) Momala Gorontalo by using physical, chemical, and

enzymatic modification processes. The research methods include physical modification

(heat moisture treatment, annealing, autoclaving-cooling cycling, microwave), chemical

modification (acid hydrolysis), and enzymatic modification (debranching pullulanase). The

results showed that the modified by heat moisture treatment (HMT) increased RS

levels 1-fold, annealing modification (ANN) 8.9-fold, autoclaving-cooling one cycle

modification (AC-1C) 2.9-fold, autoclaving-cooling two cycles modification (AC-2C) 2.0-

fold, microwave modification (MW) 1.3-fold, acid hydrolysis (HA) modification 5.0-fold,

and debranching pullulanase (DP) modification 3.8-fold compared with corn flour control

without modification. The value of the prebiotic activity of MCF hydrolysed acid (HA) is

0.03, and debranching pullulanase (DP) is 0.02 against Enteropathogenic Escherichia

coli (EPEC). The prebiotic effect value of MCF HA and DP were 0.76 and 0.60,

respectively. The prebiotic index value of MCF HA and DP were 0.60 and 0.48,

respectively. This study confirms that MCF HA and DP are good prebiotic candidates

because they have resistant starch content, low starch

digestibility, and resistance to simulated gastric fluid hydrolysis than unmodified corn flour.

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