Gibbs Energy of Nonrandomly Mixed Lattice Solutions with a Specific Interaction

Jung, Haeyoung

doi:10.5012/jkcs.2009.53.6.663

Journal of the Korean Chemical Society

2009

DOI: 10.5012/jkcs.2009.53.6.663

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Gibbs Energy of Nonrandomly Mixed Lattice Solutions with a Specific Interaction

Haeyoung Jung¹

Abstract: Performing random number simulations, we obtained an approximate distribution of the number of ways arranging molecules in a binary lattice solution of nonrandom mixing with a specific interaction. From the distribution an approximate equation of excess Gibbs energy for a binary lattice solution was derived. Using the equation, liquid-vapor equilibrium at constant pressure for 15 binary solutions were calculated and compared with the result from Wilson equation, Van Laar equation and Redlich-Kister equation.

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2019

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Deodorization Effects and Antibacterial Activity of Codonopsis lanceolata Extract

Lee¹,

Ryu²

2019

Asian J Beauty Cosmetol

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Purpose: The antioxidant effects and antibacterial effects on 7 types of dermatitis of Codonopsis lanceolata (C. lanceolata) ethanol and water extracts were investigated to study its potential as an ingredient of antibacterial cosmetics for skin and functional cosmetics for hair by testing its deodorization effects on ammonia.Methods: The total polyphenol and flavonoid contents, electron donating ability, ABTS radical scavenging activity of C. lanceolata extracts were investigated for its antioxidant effects and the antibacterial effects of c. lanceolata extract on 7 different germs causing dermatitis were explored with the paper disc method. In addition, a gas detection method was employed to test the deodorizing effects on ammonia.Results: As a result of the antioxidant effects test, the total polyphenol contents of C. lanceolata ethanol and water extracts were 88.86±1.64 and 76.46±1.23 μg/mL, respectively, and the total flavonoid contents were measured 78.29±1.13 and 60.02±1.35μg/mL, respectively. As for the 2,2-diphenylpicrylhydrazyl (DPPH) scavenging activity was 78.78% and 62.12%. The test on 2,2'-Azinobis [3ethylbenzothiazoline-6-sulfonic acid]-diammonium salt (ABTS) radical scavenging activity with was 80.12% and 72.24%. For the 7 dermatitis germs, C. lanceolata ethanol extract and water extract showed antibacterial effects at the concentration of 5 mg/mL. For the deodorization effects of C. lanceolata extract on ammonia, ethanol extract revealed 98% of deodorizing effects after 30 min. Conclusion: C. lanceolata ethanol extract had greater antioxidant effects and antibacterial effects on the 7 dermatitis germs than water extract; with higher deodorizing effects, it is considered suitable for making antibacterial cosmetics for skin and functional products for hair.

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Deodorization Effects and Antibacterial Activity of Codonopsis lanceolata Extract

Lee¹,

Ryu²

2019

Asian J Beauty Cosmetol

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Gibbs Energy of Nonrandomly Mixed Lattice Solutions with a Specific Interaction

Cited by 1 publication

References 11 publications

Deodorization Effects and Antibacterial Activity of Codonopsis lanceolata Extract

Deodorization Effects and Antibacterial Activity of Codonopsis lanceolata Extract

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