Integral Antioxidative Capacity of Extracts by Pressurized Organic Solvent from Natural Plants in Jeju

Abstract

Twenty natural plants from Jeju were extracted by pressurized organic solvent (100% methanol, 40 o C, 13.6 MPa, 10 min). Extraction yield, total phenolic content (TPC) and integral antioxidant capacity were measured, and each component was identified by GC/MS. Extraction yields were high as 21. 8%, 21.5, 21.1, 20.7 and 20.1% in Rhus javanica, Euscaphis japonica, Alnus firma, Sapium japonicum and Sorbus alnifolia, respectively. The extracts containing high TPC (mg GAE/g of dry sample) were obtained from Malus sieboldii (68.3), Sapium japonicum (57.6), Pyrrosia lingua (56.6) and Euscaphis japonica (55.1). Integral antioxidant capacities of water-soluble substances were 598, 394, 293 and 270 μmol ascorbic acid equivalent/g in Geranium thunbergii, Sapium japonicum, Cornus kousa and Rhus javanica, respectively. Integral antioxidant capacities of lipidsoluble substances were 611, 314, 296 and 242 μmol trolox equivalent/g in Ardisia crenata, Ostrya japonica, Geranium thunbergii and Quercus acuta, respectively. Fifteen major peaks were identified by GC/MS from the extract of pressurized organic solvent from Sapium japonicum. Two polyphenols (gallic acid (retention time (RT) 19.7 min)) and quercetin (33.5 min)), ascorbic acid (RT 35.3 min), and several fatty acids (retention time 18.6, 21.0, 21.8, 21.9 and 23.6 min) were identified, and gallic acid was the major polyphenol component due to high peak area.

Radical scavenging-linked anti-adipogenic activity of Alnus firma extracts

“…The ORAC of AFE was 792.01±13.10 μ M Trolox equivalents (TE)/g when it was created by Trolox standard curve (data not shown). Kim et al ( 33 ) reported that the ORAC value of methanolic extract of A. firma was 198.0±9.1 μ M TE/g, which differed from the result of the present study.…”

Antioxidative and Antimicrobial Activities of Rhodiola rosea Root as a Cosmetic Material

“…http://dx.doi.org/10.20402/ajbc.2022.0099 butylated hydroxyanisole, BHA),부틸 히드록시 톨루엔(butylated hydroxytoluene, BHT) 등이 있다. 하지만 합성 항산화제의 경우 높은 열을 가했을 시 불안정하거나 다량으로 투여됐을 때 기형 및 발암 발 생의 원인으로 작용할 수 있다는 보고가 있다 (Jo et al, 2022) (Kim et al, 2008, Park & Ryu, 2022, Choi, 2022.…”