{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T05:26:03Z","timestamp":1790659563967,"version":"4.1.0"},"reference-count":54,"publisher":"MDPI AG","issue":"9","license":[{"start":{"date-parts":[[2022,5,7]],"date-time":"2022-05-07T00:00:00Z","timestamp":1651881600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"Yun Development and Reform Commission [2018]","award":["212"],"award-info":[{"award-number":["212"]}]},{"name":"Yun Development and Reform Commission [2018]","award":["202002AA10007"],"award-info":[{"award-number":["202002AA10007"]}]},{"name":"Yun Development and Reform Commission [2018]","award":["32060089"],"award-info":[{"award-number":["32060089"]}]},{"name":"Major Basic Special Biological Resources Digital Development and Application Project","award":["212"],"award-info":[{"award-number":["212"]}]},{"name":"Major Basic Special Biological Resources Digital Development and Application Project","award":["202002AA10007"],"award-info":[{"award-number":["202002AA10007"]}]},{"name":"Major Basic Special Biological Resources Digital Development and Application Project","award":["32060089"],"award-info":[{"award-number":["32060089"]}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["212"],"award-info":[{"award-number":["212"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["202002AA10007"],"award-info":[{"award-number":["202002AA10007"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["32060089"],"award-info":[{"award-number":["32060089"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecules"],"abstract":"<jats:p>Essential oils were extracted from dark-purple, red and yellow petals of Paeonia delavayi using Supercritical Carbon Dioxide method. The compositions of essential oils were analyzed using gas chromatography-mass spectrometry (GC-MS). Antioxidant activity assays were carried out using DPPH, ABTS- and FRAP methods. Total polyphenols and total flavonoids were measured to evaluate the in vitro antioxidant activity in addition to the volatile compounds contained in the essential oils extracted from the flower petals of P. delavayi with the three flower colors. A total of 194 compounds were detected from essential oils of P. delavayi flowers, including 83 in dark-purple petals, 90 in red petals and 80 in yellow petals. These compounds mainly include alcohols, aldehydes, ketones, alkenes, alkanes, esters and polyphenols. The results showed that the volatile compounds accumulated differentially among the essential oils from the different colors of flower petals. Principal component analysis (PCA) indicated that essential oils derived from dark-purple and red petals were more closely clustered while the yellow petal essential oil was very different with both the purple-red and red. Antioxidant assays suggested that the radical scavenging activity and the iron reduction antioxidant activity in the essential oils were highly correlated with the flower petal colors. These results suggest P. delavayi flower petals are potentially good resources for high quality essential oils and natural antioxidants.<\/jats:p>","DOI":"10.3390\/molecules27093000","type":"journal-article","created":{"date-parts":[[2022,5,8]],"date-time":"2022-05-08T21:31:20Z","timestamp":1652045480000},"page":"3000","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Phytochemical Compositions and Antioxidant Activities of Essential Oils Extracted from the Flowers of Paeonia delavayi Using Supercritical Carbon Dioxide Fluid"],"prefix":"10.3390","volume":"27","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0269-6270","authenticated-orcid":false,"given":"Xiao","family":"Yu","sequence":"first","affiliation":[{"name":"Faculty of Landscape Architecture and Horticulture Sciences, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Huaibi","family":"Zhang","sequence":"additional","affiliation":[{"name":"New Zealand Institute for Plant & Food Research Limited, Private Bag, Palmerston North 11600, New Zealand"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juan","family":"Wang","sequence":"additional","affiliation":[{"name":"Eco-Development Academy, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Junming","family":"Wang","sequence":"additional","affiliation":[{"name":"Faculty of Forestry, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6110-9216","authenticated-orcid":false,"given":"Zhenxing","family":"Wang","sequence":"additional","affiliation":[{"name":"Faculty of Life Science, Southwest Forestry University, Kunming 650224, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinbo","family":"Li","sequence":"additional","affiliation":[{"name":"Dianxiangguose Agricultural Technology Company Limited of Yunnan Province, Kunming 652501, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2022,5,7]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Shi, Q.Q., Zhou, L., and Wang, Y. 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