Molecular Insights into the Aroma Difference between Beer and Wine: A Meta-Analysis-Based Sensory Study Using...

Area of Science:

• Food Science
• Sensory Analysis
• Organic Chemistry

Background:

• Beer and wine possess distinct aroma profiles, yet the underlying molecular differences remain under-investigated.
• A systematic analysis of aroma compounds in these popular beverages is needed to understand their olfactory distinctions.

Purpose of the Study:

• To systematically investigate the molecular basis of aroma differences between beer and wine.
• To identify key odorants contributing to the characteristic aromas of beer and wine.
• To determine the impact of specific aroma compounds on sensory perception.

Main Methods:

• Conducted a comprehensive literature survey of odorant concentrations in beer and wine samples.
• Selected key odorants based on concentration and sensory threshold data to build aroma base models.
• Utilized orthonasal concentration leveling tests to evaluate the contribution of specific odorant groups.

Main Results:

• Identified 40 common odorants between beer and wine, with 29 and 32 selected for beer and wine aroma models, respectively.
• Fruity smelling compounds, predominantly esters, were identified as crucial for olfactory differentiation.
• Sensory evaluation confirmed that adjusting fruity ester concentrations in beer to wine levels shifted perception from beer-like to wine-like.

Conclusions:

• Esters, particularly fruity ones, play a critical role in the distinct aroma profiles of beer and wine.
• The quantitative differences in these fruity compounds are a primary driver of the perceived difference between beer and wine aromas.
• This research provides a molecular basis for understanding and potentially manipulating the aroma characteristics of fermented beverages.