Atranorin
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Actividad antioxidante de los polifenoles de HYPOGYMNIA TAVARESII D. HAWKSW. & P. JAMES
Lichen substances have more than one phenolic hydroxyl group attached to one or more benzene rings, thus qualifying them as polyphenols. The secondary metabolites isolated from the lichen H. tavaresii have been studied in a bid to find compounds protective against oxidative stress and free radical-induced damage. The compounds were identified based on their
Quím. Nova. Publicado em: 2016-05
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2. Chemotaxonomic Fingerprinting of Chilean Lichens Through Maldi and Electrospray Ionization Mass Spectrometry
The aim of this work was to study a fast, new, sensitive, and simple method for the chemotaxonomic classification of Chilean lichens (Teloschistes chrysophthalmus, Ramalina farinacea, Usnea pusilla, Ramalina chilensis and Stereocaulon ramulosum) using MALDI-TOF-MS and UPLC-ESI(-)-MS data. Lichens soluble proteins fingerprints were acquired by MALDI-TOF-MS an
Braz. arch. biol. technol.. Publicado em: 13/01/2015
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3. In vitro radical-scavenging activity, toxicity against A. salina, and nmr profiles of extracts of lichens collected from Brazil and Antarctica
Extracts of six lichen species collected from Brazil and Antarctica were investigated for their potential toxicity and radical-scavenging properties. The composition of the extracts was investigated using TLC and NMR, leading to identification of atranorin (1), along with salazinic (2), barbatic (3), α-alectoronic (4), α-collatolic (5), cryptochlorophaeic
Quím. Nova. Publicado em: 2014-07
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4. Parmotrema hydrium, a new species of Parmeliaceae in southeastern Brazil
Parmotrema hydrium is a new lichen species discovered during a survey of Parmeliaceae in the Cantareira mountain range of southeastern Brazil. In its medullary chemistry, the species contains several fatty acids and other substances, including small amounts of atranorin, typically restricted to the soralia and young lobes.
Acta Bot. Bras.. Publicado em: 2013-12
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5. Evaluation of wound healing activity of atranorin, a lichen secondary metabolite, on rodents
The aim of this study was to investigate the wound healing activity of atranorin cream (Patent requested) on excision wounds. Seventy-two male rats were anesthetized and an excisional wound was performed. Then the rats were randomly assigned into three groups: untreated control group; atranorin 1 (group treated with 1% AT ointment); and atranorin 5 (group tr
Rev. bras. farmacogn.. Publicado em: 01/02/2013
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6. Anti-inflammatory and toxicity studies of atranorin extracted from Cladina kalbii Ahti in rodents
Atranorina (ATR) é o principal composto do líquen Cladina kalbii Ahti, que cresce em terras áridas do nordeste brasileiro. Este estudo foi realizado para avaliar as propriedades antiinflamatórias e toxicológicas da ATR. Para avaliar as propriedades antiinflamatórias, o edema de pata foi induzido, administrando-se 0,1 mL de carragenina na região subpla
Brazilian Journal of Pharmaceutical Sciences. Publicado em: 2011-12
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7. Chemical composition and antioxidant activity of lichen Toninia candida
In the present investigation, methanol, chloroform and petrol ether extracts from the lichen Toninia candida (Weber) Th. Fr, Catillariaceae, were assayed for their antioxidant activity. The phenolic composition of the extracts was determined by HPLC-UV analysis. The predominant phenolic compound in all the extracts was depsidone, norstictic acid. All the tes
Revista Brasileira de Farmacognosia. Publicado em: 07/10/2011
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8. Constituintes químicos de Parmotrema lichexanthonicum Eliasaro & Adler: isolamento, modificações estruturais e avaliação das atividades antibiótica e citotóxica
From the lichen Parmotrema lichexantonicum were isolated the depsidone salazinic acid, the xanthone lichexanthone, and the depside atranorin. The two major compounds, salazinic acid and lichexanthone, were selected for structure modifications. Salazinic acid afforded O-alkyl salazinic acids, some of them potentially cytotoxic against tumor cell lines (HCT-8,
Química Nova. Publicado em: 2009
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9. Atividade antimicrobiana de compostos de Canoparmelia texana (tuck.) elix &hale (lÃquen)
Este trabalho teve como objetivo estudar a atividade antimicrobiana de Canoparmelia texana (Tuck.) Elix &Hale. Extratos orgÃnicos foram obtidos a partir de 50g do talo liquÃnico, atravÃs de extraÃÃes à temperatura ambiente e a quente, obedecendo à sÃrie eluotrÃpica, com Ãter dietÃlico, clorofÃrmio e acetona. Os componentes quÃmicos do lÃquen fo
Publicado em: 2008
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10. BioproduÃÃo de metabÃlitos de Canoparmelia texana (Tuck.) Elix &Half a partir de imobilizaÃÃo celular
Este estudo teve como objetivo produzir metabÃlitos de Canoparmelia texana (Tuck.) Elix &Hale a partir da imobilizaÃÃo de cÃlulas e fragmentos do talo in natura, atravÃs do uso de biorreatores com sistema fixo (tradicional), em movimento, e sob fluxo contÃnuo. CÃlulas extraÃdas de C. texana, ou fragmentos do talo foram imobilizados, separadamente, em
Publicado em: 2007
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11. Atividade antinociceptiva, antipirÃtica e antiinflamatÃria do extrato bruto e do Ãcido fumarprotocetrÃrico isolado de Cladonia verticillaris (lÃquen)
The purpose of this work was to evaluate the anti-inflammatory, antinociceptive and antipyretic activity of the acetonic extract and the isolated fumarprotocetraric acid from Cladonia verticillaris (Raddi) Fr. ocurring on sandy soils of savannah-like vegetation of Mamanguape county (ParaÃba-Brazil). The acetonic extract was obtained from the dried lichen th
Publicado em: 2003
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12. Chemical constituents from Ouratea floribunda: complete¹H and 13C NMR assignments of atranorin and its new acetyl derivative
O fracionamento cromatográfico do extrato hexânico da madeira de Ouratea floribunda (Ochnaceae) forneceu, além dos triterpenos friedelina (1), friedelanol (2) e lupeol (3), o depsídeo atranorina (4). As estruturas das substâncias isoladas foram determinadas através da análise dos dados espectroscópicos de RMN ¹H e 13C, massas e comparação com dado
Journal of the Brazilian Chemical Society. Publicado em: 2000-04