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Hydrogen bonding of water–ethanol in alcoholic beverages

Paper ID Volume ID Publish Year Pages File Format Full-Text
22018 43249 2006 12 PDF Available
Title
Hydrogen bonding of water–ethanol in alcoholic beverages
Abstract

An alcoholic beverage is a type of water–ethanol solution with flavor and taste. The properties of the hydrogen bonding of water–ethanol in alcoholic beverages have not been clarified sufficiently. We investigated factors that could affect the hydrogen-bonding structure of water–ethanol on the basis of proton nuclear magnetic resonance (1H NMR) chemical shifts of the OH of water–ethanol and Raman OH stretching spectra. Not only acids (H+ and HA: undissociated acids) but also bases (OH− and A−: conjugate-base anions from weak acids) strengthened the hydrogen-bonding structure of water–ethanol. It was also demonstrated that the hydrogen bonding is strengthened by chemical components in alcoholic beverages (whiskey, Japanese sake, shochu). It can be suggested that hydrogen-bonding donors as well as acceptors in alcohol beverages, which exist as the initial components or are gained later on, should cause the tight association between water and ethanol molecules.

Keywords
chemical shift in proton nuclear magnetic resonance; hydrogen bonding; Raman spectrum; water structure; water–ethanol; whiskey; Japanese sake; shochu
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Publisher
Database: Elsevier - ScienceDirect
Journal: Journal of Bioscience and Bioengineering - Volume 102, Issue 4, October 2006, Pages 269–280
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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