Results 91 to 100 of about 2,517,497 (197)
Synthesis of acyl-hydrazone from usnic acid and isoniazid and its anti-Mycobacterium tuberculosis activity [PDF]
, 2017 Compound usnic acid (1), isolated from lichen Evernia prunastri (Cajamarca-Peru) and the synthesis and characterization of its acyl-hydrazone (2), from the condensation reaction between usnic acid and isoniazid in an ethanol solution under reflux, giving
Inocente Camones, Miguel Angel +11 more
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The phytotoxic lichen metabolite, usnic acid, is a potent inhibitor of plant p-hydroxyphenylpyruvate dioxygenase [PDF]
, 2000 The lichen secondary metabolite usnic acid exists as a (−) and a (+) enantiomer, indicating a α or β projection of the methyl group at position 9b, respectively.
Nanayakkara, N.P.Dhammika +7 more
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An NMR crystallographic characterisation of solid (+)-usnic acid [PDF]
This work was supported by the EPSRC through the Collaborative Computational Project on NMR Crystallography (CCP-NC), via EP/T026642/1.We use a combination of one- and two-dimensional solid-state nuclear magnetic resonance (NMR) spectroscopy and density ...
Ashbrook, Sharon E. +2 more
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Ecological IndicatorsMetal contamination and climate change, driven by global warming, are influencing the release and bioavailability of trace and heavy metals in the Arctic. Lichens, particularly Flavocetraria nivalis and Cladonia mitis, serve as effective bioindicators of
Patrycja Dziurowicz +11 more
doaj +1 more source
Data mining from oscillatory reactions perturbed by Usnic acid
The influence of Usnic acid was investigated in two iodate based oscillatory reactions: Bray Liebhafsky and Briggs-Raucher with the aim of possible application in determining the reactivity of this acid in complex reaction systems.
Maćešić, Stevan +4 more
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Antimicrobial and Efflux Inhibitor Activity of Usnic Acid Against Mycobacterium abscessus
, 2018 New drugs are needed to treat infections with antimicrobial-resistant Mycobacterium abscessus; therefore, we evaluated usnic acid as an antimicrobial agent and efflux inhibitor (EI) against M. abscessus.
Ana Reis +6 more
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Does usnic acid affect microtubules in human cancer cells?
, 2010 Usnic acid, a lichen metabolite, is known to exert antimitotic and antiproliferative activities against normal and malignant human cells. Many chemotherapy agents exert their activities by blocking cell cycle progression, inducing cell death through ...
Thompson, A. M. +6 more
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Chemical and biodegradation studies on usnic acid
, 1974 This thesis describes investigations on the biodegradation of the lichen substance (+)-usnic acid (35), a natural antibiotic, by several soil fungi and bacteria.
Sanchez Flores, Ignacio Humberto
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, 2004 In modern medicine, artificial devices are used for repair or replacement of damaged parts of the body, delivery of drugs, and monitoring the status of critically ill patients.
G. Donelli +11 more
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Pesquisa Veterinária Brasileira: Cladonia substellata Vainio is a lichen found in different regions of the world, including the Northeast of Brazil. It contains several secondary metabolites with biological activity, including usnic acid, which has exhibited a wide range of biological
Jusciêne B. Moura +7 more
doaj +1 more source