Results 51 to 60 of about 1,590 (200)

Redirecting a Fungal Quercetin 2,3‐Dioxygenase Toward Artificial Flavonols

ChemCatChem, Volume 18, Issue 6, 27 March 2026.
A novel quercetin 2,3‐dioxygenase was engineered to reshape its substrate‐binding cavity and redirect its specificity toward artificial flavonols. One variant with a larger substrate‐binding cavity exhibited 20‐ to 1750‐fold higher activity toward bulky flavonols with phenyl‐based substitutions at position C‐8.
Michael Kotik, Natalia Kulik, Stanislav Musil, Petr Halada, Lucie Petrásková, Andrea Ramundo, Tatsiana Charnavets, Martina Hurtová, Vladimír Křen, Kateřina Valentová   +9 more
wiley   +1 more source

Antibacterial and Antifungal Activities of Some Phenolic Metabolites Isolated from the Lichenized Ascomycete

Natural Product Communications, 2008
The water-ethanol extract of the lichen Ramalina lacera has been evaluated for its chemical constituents, and for its antibacterial and antifungal properties.
Lumír O Hanuš, Marina Temina, Valery M Dembitsky   +2 more
doaj   +1 more source

Effects of Fumarprotocetraric Acid, a Depsidone from the Lichen Cladonia verticillaris, on Tyrosinase Activity

Orbital: The Electronic Journal of Chemistry, 2017
Lichens are widely distributed around the world. Their phenolic compounds, consisting mainly of depsides and depsidones, have been extensively studied for important biological activities.
Luiz Fabrício Gardini Brandão, Noemia Pereira da Silva Santos, Eugênia Cristina Gonçalves Pereira, Nicácio Henrique da Silva, Maria de Fatima Cepa Matos, Danielle Bogo, Neli Kika Honda   +6 more
doaj   +3 more sources

The ultraviolet and infrared spectra of some lichen depsides and depsidones

, 1966
The ultraviolet and infrared spectral data for a number of lichen depsides, depsidones and their fission products have been recorded. The U.V. spectra of the orcinol depsides, orcinol depsidones and β-orcinol depsidones are characteristic while those of ...
Sarma, K. G., Seshadri, T. R., Rao, P. S.   +2 more
core   +1 more source

Dereplicative Combination of HPLC/DAD/MS and 2D NMR to Identify Lichexanthone Isomers in Lichen Extracts

Phytochemical Analysis, Volume 37, Issue 2, Page 330-343, March 2026.
ABSTRACT Introduction Lichexanthones are the major xanthones found in lichens. They present a high degree of isomerism, which makes their identification tedious. Xanthones are known to occur in lichens according to chemosyndromes, and these compounds act as chemotaxonomic markers.
Solenn Ferron, Marylène Chollet‐Krugler, Hermann Pinson, Rania Marzoug, Philippe Uriac, Françoise Lohézic‐Le Dévéhat   +5 more
wiley   +1 more source

Phylogenetic Studies and Metabolite Analysis of Sticta Species from Colombia and Chile by Ultra-High Performance Liquid Chromatography-High Resolution-Q-Orbitrap-Mass Spectrometry

Metabolites, 2022
Eleven species of lichens of the genus Sticta, ten of which were collected in Colombia (S. pseudosylvatica S. luteocyphellata S. cf. andina S. cf. hypoglabra, S. cordillerana, S. cf. gyalocarpa S. leucoblepharis, S. parahumboldtii S.
Laura Albornoz, Alfredo Torres-Benítez, Miguel Moreno-Palacios, Mario J. Simirgiotis, Saúl A. Montoya-Serrano, Beatriz Sepulveda, Elena Stashenko, Olimpo García-Beltrán, Carlos Areche   +8 more
doaj   +1 more source

depsides

, 2014
Citation: 'depsides' in the IUPAC Compendium of Chemical Terminology, 3rd ed.; International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. 10.1351/goldbook.D01603 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms.
openaire   +1 more source

Synthesis of para-olivetol depsides

, 1974
The unambiguous synthesis of the lichen depsides, anziaic, perlatolic, 2'-O-methylanziaic, 2-O- methylperlatolic, 2'-O-methylperlatolic, 4-O-demethylplanaic, planaic, imbricaric and stenosporic acids is reported.
JA Elix
core   +1 more source

Functional Traits Mediate Physico‐Chemical Niche Differentiation of Epiphytic Lichens and Bryophytes in Temperate Forests

Journal of Vegetation Science, Volume 37, Issue 2, March/April 2026.
Host tree identity drives bark physico‐chemical filters (e.g., pH, metals) that shape epiphytic communities. We show that species‐specific functional traits, such as lichen substances and bryophyte growth forms, mediate these responses. Lichen metal homeostasis and bryophyte growth habit create distinct species thresholds and community change points ...
Theresa Möller, Stefan Kaufmann, Markus Hauck   +2 more
wiley   +1 more source

Synthesis of para-β-orcinol depsides

, 1975
The unambiguous syntheses of the lichen depsides norobtusatic acid, obtusatic acid, 4-O-demethyl-barbatic acid, barbatic acid, diffractaic acid, chloroatranorin, baeomycesic acid and squamatic acid are reported.
S Norfolk, JA Elix
core   +1 more source