Water has the Capability of Reducing the Alcohol-Stimulative Taste of Spirits | Chapter 05 | Challenges and Advances in Chemical Science Vol. 6

 The effects of solutes on the stimulative taste of ethanol in transparent spirits like vodkas were studied to see which components could change the alcohol-stimulative flavour and so improve the spirits' quality. MgCl2, MgSO4, and NaHCO3 have been shown to lower the alcohol-stimulative taste of spirits while also strengthening the hydrogen-bonding structure of water-ethanol in spirits. The proton nuclear magnetic resonance (1H NMR) spectroscopy revealed that the lowering of the alcohol-stimulative taste is linked to a change in the hydrogen-bonding structure in spirits. These salts in spirits appear to have come from water added to spirits prior to bottling. The stimulative taste of ethanol in spirits may be affected by several salts in water. Water has been proven to be a crucial element that has a significant impact on the quality of spirits.

Author(S) Details

Akira Nose
Department of Nutritional Science, Faculty of Human Ecology, Yasuda Women's University, 6-13-1, Yasuhigashi, Hiroshima Asaminami-ku, Hiroshima 731-0153, Japan.

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Structural and Biocidal Studies of Monobutyltin (IV) Derivatives of 1-Hydroxy-2-Naphthoic Acid | Chapter 04 | Challenges and Advances in Chemical Science Vol. 6

 Biocidal effects of organotin compounds, such as antibacterial, antifungal, and antipestal activity, are well documented. A few organotin (IV) derivatives in 1:1 [BuSn(L)(OPri)] have been produced. The reaction between monobutyltin triisopropoxide and 1-Hydroxy-2-naphthoic acid produces 1:2 [BuSn(LH)2(OPri)], 1:3 [BuSn(LH)3], and 2:1 [(BuSn)2L(OPri)4] molar ratios (where L = 1-Hydroxy-2-naphthoic acid). Elemental studies, as well as IR and NMR experimental techniques, were used to investigate the produced derivatives. By knowing the Minimum Inhibitory Concentration (MIC) values on gramme positive (Staphylococcus aureus) and gramme negative (Escherichia coli) bacteria, as well as Aspergillus niger and Candida albicans fungi, the derivatives were evaluated for antibacterial and antifungal activity. Antipestal properties against the pest Tribolium castaneum were also tested on the compounds. These compounds outperformed the comparable ligand in terms of biocidal activity.

Author(S) Details

Pankaj Mittal
Department of Chemistry, Anand Engineering College, Keetham, Agra, 282 007, India.

Manoj Kumar Pachouri
Department of Chemistry, Anand Engineering College, Keetham, Agra, 282 007, India.

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