The impact of germination time on the some selected parameters through malting process

Area of Science:

• Agricultural Science
• Food Science
• Biochemistry

Background:

• Barley malt is a key ingredient in brewing and distilling.
• Germination is a critical step in malting, influencing enzyme development and chemical composition.
• Understanding the effects of germination time is essential for optimizing malt quality.

Purpose of the Study:

• To investigate the impact of varying germination times (3, 5, and 7 days) on enzyme activity and polysaccharide content in Joseph barley malt.
• To determine the optimal germination period for specific malt characteristics.

Main Methods:

• A completely randomized design was employed with three germination time levels.
• Enzyme activities (α-Amylase, beta-Glucanase) and polysaccharide content (starch, beta-glucan) were analyzed.
• Statistical analysis, including Duncan's test, was used for data comparison.

Main Results:

• Starch content decreased with increased germination time (3 to 7 days).
• Beta-glucan content also reduced as germination progressed.
• Highest enzymatic activity (253 U/kg) and diastatic power were observed at 7 days of germination.
• Malting efficiency decreased with longer germination, while hot water extract efficiency increased.

Conclusions:

• Germination time is a critical factor influencing barley malt composition and enzymatic properties.
• Extended germination (7 days) maximizes enzymatic activity but reduces starch and beta-glucan.
• These findings provide insights for optimizing malting processes to achieve desired malt characteristics for specific applications.