Author
Zahira E. Aguiar
Bio: Zahira E. Aguiar is an academic researcher from University of La Laguna. The author has contributed to research in topics: Diterpene & Salvia texana. The author has an hindex of 10, co-authored 12 publications receiving 327 citations.
Topics: Diterpene, Salvia texana, Ageratum conyzoides, Salvia, Quinone methide
Papers
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TL;DR: Phenalenone-type phytoalexins were obtained for the first time from bananas and identified by COSY 1 H-1 H, HMQC and HMBC techniques, and X-ray analysis, among other methods as discussed by the authors.
Abstract: Phenalenone-type phytoalexins were obtained for the first time from bananas and identified by COSY 1 H- 1 H, HMQC and HMBC techniques, and X-ray analysis, among other methods. The aminoglycoside kanamycin was studied as a phytoalexin inducer in banana leaves and fruit and compared with the effects produced by the fungus Mycosphaerella fidjiensis. The phenyl side chain in banana phytoalexins is not in the same position as in other plant phenalenones and so an alternative biogenetic pathway has been proposed and is currently being verified
71 citations
TL;DR: In this article, a biogenetic pathway to highly oxidized abietatriene diterpenes in which enzymatic dehydrogenation processes and the participation of singlet-state oxygen appear to play an important role.
52 citations
TL;DR: Analysis of the aerial part of Ayeratum conyzoides afforded 11 chromenes, sitosterol, (+)-sesamin and caryophyllene oxide, one of which is new and eight of the others obtained for the first time from this species, which has been used both in folk medicine and as an insecticide.
49 citations
TL;DR: In this article, the new natural diterpenes, 6,7-didehydroferruginol, 6.7-Didehydrosempervirol, 16-hydroxy-6, 7-DIDEHORFERRIGNOL, 11,12,16-trihydroxy, 20(10 → 5)abeo-abieta-1(10),6,8,11,13-pentaene, the diterpene quinones, 16hydroxyroyleanone and 6-deox
38 citations
TL;DR: Nine methoxyflavones were obtained from aerial parts of Ageratum conyzoides, two of which are new: 5,6,8,3′,4′,5′-hexamethoxyFlavone and 8-hydroxy-5, 6,7, 3′, 4′, 5′- hexameth oxygenflavone.
35 citations
Cited by
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TL;DR: More than 450 new flavonoid structures, reported from January 2001 until December 2003, are reviewed and the biological activity of some of the compounds is discussed.
656 citations
TL;DR: The nature of these polyphenols which have been reported is compiled in this report together with some bioactivity data in an effort to show the rapid development in the phytochemistry and the therapeutic applications of the Salvia species.
623 citations
TL;DR: The photoprotection conferred by the xanthophyll cycle and the antioxidant function of tocopherols, lutein and diterpenes may help to avoid irreversible damage in severe drought, making possible the recovery of functional membranes after the autumn rainfalls.
Abstract: Two-year-old rosemary (Rosmarinus officinalis L.) plants were subjected to severe stress by exposure to prolonged drought during a Mediterranean summer. Severely stressed plants recovered completely after the autumn rainfalls although the relative water content remained below 35% for 3 months and the chlorophyll content of leaves was reduced by up to 85% during the drought. In severe stress: (i) α-tocopherol increased 9-fold per g dry weight and 20-fold per unit of chlorophyll; (ii) lutein and β-carotene contents decreased on a dry-weight basis, but an 80% increase in lutein and constant levels of β-carotene were observed on a chlorophyll basis; (iii) there were transient and sustained increases in the de-epoxidation state of the xanthophyll cycle; and (iv) the highly oxidised abietane diterpene isorosmanol increased 8-fold as a result of the oxidation of carnosic acid. With the autumn rainfalls, water status, α-tocopherol and violaxanthin recovered first and the levels of photosynthetic pigments and abietane diterpenes increased later. The photoprotection conferred by the xanthophyll cycle and the antioxidant function of tocopherols, lutein and diterpenes may help to avoid irreversible damage in severe drought, making possible the recovery of functional membranes after the autumn rainfalls. Besides, chlorophyll loss reduces the amount of photons absorbed by leaves, which enhances the photoprotective and antioxidant capacity of leaves per amount of photons absorbed, since the ratios of xanthophylls, α-tocopherol and abietane diterpenes to chlorophyll increase.
400 citations
TL;DR: A review of medicinal plants traditionally used for diabetes management in Nigeria and ways in which their therapeutic potential can be properly harnessed for possible integration into the country's healthcare system are highlighted.
335 citations
TL;DR: This paper aims to provide a history of forensic medicine in China and its applications in the field of regenerative medicine, as well as some examples of how modern forensic medicine has changed over time.
Abstract: Yi-Bing Wu,† Zhi-Yu Ni,† Qing-Wen Shi,*,† Mei Dong,‡ Hiromasa Kiyota,* Yu-Cheng Gu,†,∥ and Bin Cong*,‡ †School of Pharmaceutical Sciences, Hebei Key Laboratory of Forensic Medicine, Hebei Medical University, Shijiazhuang, Hebei Province 050017, China ‡Department of Forensic Medicine, Hebei Medical University, Hebei Key Laboratory of Forensic Medicine, Shijiazhuang, Hebei Province 050017, China Department of Bioscience and Biotechnology for Future Bioindustry, Graduate School of Agricultural Science, Tohoku University, 1-1 Tsutsumidori-Amamiya, Aoba-ku, Sendai 981-8555, Japan Syngenta Jealott’s Hill International Research Centre, Berkshire RG42 6EY, United Kingdom
321 citations