Presentation Title

Natural Additives for Improving the Efficiency of Detergents in Removal of 2-trans-nonenal (Aging Odor)

Faculty Mentor

Asmik Oganesyan

Start Date

17-11-2018 9:00 AM

End Date

17-11-2018 9:15 AM

Location

C327

Session

Oral 1

Type of Presentation

Oral Talk

Subject Area

physical_mathematical_sciences

Abstract

Aging odor associated with the elderly is caused by the production of a greasy compound, 2-trans-nonenal. It has been reported that this compound is not washed by regular soaps, thus cosmetic companies attempted to produce a soap that is claimed to remove 2-trans-nonenal. Several studies showed that tannic acid, the main component of this soap is responsible for trapping the hydrophobic 2-trans-nonenal. In our research, we aimed to investigate the effect of adding natural tannin-containing products to commercially available detergents to remove 2-trans-nonenal from different fabrics. We conducted various quantitative and qualitative tests to analyze tannins in multiple herbs. Additionally, the antioxidant properties of the natural compounds were studied using DPPH assay, and the IR spectra of the isolated extracts were taken to identify the major tannin components. We have confirmed that hydrolysable tannins isolated from sea lavender exhibited effective removal of 2-trans-nonenal from the fabrics treated with this chemical.

Summary of research results to be presented

In our research, we analyzed tannins isolated from various plants by reflux, continuous soxhlet extraction, and alcohol maceration. Quantitative analysis of the extracts was conducted to determine the percentage of tannins, and several qualitative tests were performed to identify the types of tannins (hydrolysable vs non-hydrolysable tannins). Further IR analysis were performed to match the functional groups with particular tannin categories, and UV-Vis spectrometry was used to determine the ranges of absorption of these tannins. DPPH assay confirmed correlation between the presence of tannins and antioxidant properties. Based on our preliminary tests, sea lavender displayed the highest concentration of hydrolyzable tannins, and was tested for its’ ability to remove 2-trans-nonenal from various fabrics with promising results.

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Nov 17th, 9:00 AM Nov 17th, 9:15 AM

Natural Additives for Improving the Efficiency of Detergents in Removal of 2-trans-nonenal (Aging Odor)

C327

Aging odor associated with the elderly is caused by the production of a greasy compound, 2-trans-nonenal. It has been reported that this compound is not washed by regular soaps, thus cosmetic companies attempted to produce a soap that is claimed to remove 2-trans-nonenal. Several studies showed that tannic acid, the main component of this soap is responsible for trapping the hydrophobic 2-trans-nonenal. In our research, we aimed to investigate the effect of adding natural tannin-containing products to commercially available detergents to remove 2-trans-nonenal from different fabrics. We conducted various quantitative and qualitative tests to analyze tannins in multiple herbs. Additionally, the antioxidant properties of the natural compounds were studied using DPPH assay, and the IR spectra of the isolated extracts were taken to identify the major tannin components. We have confirmed that hydrolysable tannins isolated from sea lavender exhibited effective removal of 2-trans-nonenal from the fabrics treated with this chemical.