title: Comparative Evaluation of the Chemical Composition, Antioxidant and Antimicrobial Activities of the Volatile Oils of Hawk Tea from Six Botanical Origins.
abstract: In this study, volatile oils of six Hawk tea varieties were studied for their chemical composition, antioxidant and antimicrobial activities to screen the most suitable botanical origins of Hawk tea. A total of 72 components were separated and identified from the six oils. The major constituents of the volatile oils were: α-pinene, camphene, limonene, 1,8-cineole, linalool, cis-nerolidol, and germacrene B. Moreover, the volatile oils were evaluated for antioxidant potential and antimicrobial activities. The results showed that all volatile oils exhibited acceptable antioxidant and antimicrobial activities, which suggested that these volatile oils may serve as natural alternatives to synthetic antioxidants and preservatives to be applied in food and pharmaceutical industries. Principal component analysis results denoted that some major compounds may be closely related to the antioxidant and antimicrobial activities. It also showed that the volatile oils from Litsea coreana var. lanuginosa and Litsea pungens Hemsl. were characterized by positive values of first two principal components, indicating higher active chemical compounds and antioxidant and antimicrobial activities compared with other species. Thus, they were temporarily considered as good sources of Hawk tea.
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Bao
authors.initials: B
authors.lastname: Yu
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Dan
authors.initials: D
authors.lastname: Zhang
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Xue-Wei
authors.initials: XW
authors.lastname: Yan
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Jian-Wei
authors.initials: JW
authors.lastname: Wang
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Ling
authors.initials: L
authors.lastname: Yao
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Li-Hong
authors.initials: LH
authors.lastname: Tan
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Sheng-Ping
authors.initials: SP
authors.lastname: Zhao
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Na
authors.initials: N
authors.lastname: Li
authors.affiliation: College of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.|The Lab of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, P. R. China.
authors.forename: Wei-Guo
authors.initials: WG
authors.lastname: Cao
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000935:Antifungal Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D004305:Dose-Response Relationship, Drug; D006090:Gram-Negative Bacteria / Q000187:drug effects; D006094:Gram-Positive Bacteria / Q000187:drug effects; D008826:Microbial Sensitivity Tests; D009822:Oils, Volatile / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D025341:Principal Component Analysis; D013329:Structure-Activity Relationship; D013662:Tea / Q000737:chemistry*; D015003:Yeasts / Q000187:drug effects
chemical_list: D000900:Anti-Bacterial Agents; D000935:Antifungal Agents; D000975:Antioxidants; D009822:Oils, Volatile; D013662:Tea
keywords: Antimicrobial activities; Antioxidant activities; Hawk tea; Principal component analysis (PCA); Volatile oil composition