Spectroscopic Study on the Anti-oxidant Properties of Flavonoid Galangin

Abstract

The spectroscopic behavior of catechin (5,7,3',4'-tetrahydroxyflavan-3-ol), has been studied in the presence and the absence of air using UV-vis absorption spectrophotometry and fluorescence spectroscopy. The UV-vis absorption spectrum of catechin shows a very sharp and strong absorption maximum peak at 275 nm in deaerated water. New absorption maximum peaks appeared in aerated water, as well as in basic aqueous solution, caused by the oxidation of catechin. The absorbances in the UV-vis absorption spectrum of catechin decreased when the solution was left in the dark for a long time. The fluorescence emission spectrum of catechin after a long time period differs markedly from that in freshly prepared solution; the fluorescence maxia shifted as time passes after adding catechin to the solutions. When the deaerated basic catechin solutions were left in the dark for a long time, their fluorescence quantum yields were found to be nearly zero. This suggests that the oxidized catechin molecules were seen to have slowly undergone successive chemical reactions in basic buffer solution.

Effect of Detox Lifestyle on Skin Care Satisfaction and the Client Quality of Life at a Skin Care Salon

“…우 리나라에서도 웰빙에 대한 관심이 높아짐에 따라 삶의 질 향상을 위 한 디톡스 라이프에 대한 인식이 새롭게 구축되고 연구되어지는 현 실이다 (Kang, 2017). 디톡스 라이프의 대표적인 유형으로는 식이 요 법과 관련하여 다이어트, 인스턴트 음식의 자제, 소식, 해독 식사, 배 설 등이 있으며, 운동 요법으로 적당한 운동을 통한 땀의 배출 등이 있고, 생활습관 개선 요법으로 호흡을 통한 독소 배출, 명상, 양질의 수면, 반신욕, 스트레스 해소를 위한 다양한 테라피 등이 있다 (Park, 2005).…”