Results 31 to 40 of about 11,091 (232)
Natural Product Communications, 2018 Fifty natural and synthetic hydroxy-, aminohydroxynaphthazarins and related quinones were tested for their antiradical activities using 2,2'-azinobis(3-ethylbenzothiazoline-6-sulfonate) (ABTS) scavenging assay.
Nikita S. Polonik +2 more
doaj +1 more source
Separation and identification of menaquinones irom microorganisms
Journal of Lipid Research, 1971 Simple thin-layer chromatographic procedures are outlined for the separation, isolation, and characterization of a complex of lipophilic naphthoquinones.
PATRICK J. DUNPHY +2 more
doaj +1 more source
Calli Essential Oils Synergize with Lawsone against Multidrug Resistant Pathogens. [PDF]
, 2017 The fast development of multi-drug resistant (MDR) organisms increasingly threatens global health and well-being. Plant natural products have been known for centuries as alternative medicines that can possess pharmacological characteristics, including ...
Alsaadi, Abrar I +6 more
core +2 more sources
Journal of Tropical Medicine, 2017 A total of 28 lapachol-related naphthoquinones with four different scaffolds were synthesized and spectroscopically characterized. In vitro antiplasmodial activity was assayed against the chloroquine-resistant Plasmodium falciparum W2 strain by the ...
Tatiane Freitas Borgati +5 more
doaj +1 more source
Synthesis of branched naphthoquinones from castor oil
Orbital: The Electronic Journal of Chemistry, 2012 The naphthoquinones are cyclic aromatic α,β-dienonas with a basic framework derived from naphthalene. They are also found in many higher plants, algae, fungi and as the product of the metabolism of some bacteria having large biologica activity ...
Adriano Olímpio da Silva +4 more
doaj +1 more source
ZZE-Configuration of chromophore ß-153 in C-phycocyanin from Mastigocladus laminosus [PDF]
, 1987 The photochemistry of C-phycocyanin has been studied after denaturation in the dark. It shows an irreversible reaction which has characteristics of a Ζ,Ζ,Ε- to Z,Z,Z-isomerization of dihydrobilins. Its amplitude depends on the reaction conditions, with
Bode, W. +7 more
core +1 more source
Sensors, 2006 Naphthoquinones are one of the groups of secondary metabolites widespread innature, where they mostly appear as chromatic pigments. They embody broad-range ofbiological actions from phytotoxic to fungicidal.
Rene Kizek +11 more
doaj +1 more source
An investigation into the enhancement of fingermarks in blood on paper with genipin and lawsone [PDF]
, 2013 The abilities of two natural products, genipin and lawsone, to enhance blood contaminated fingermarks on papers of various porosities and colour were investigated and compared to the routinely used amino acid reagents, ninhydrin and 1,8-diazafluoren-9 ...
Farrugia, Kevin J., Thomas, Paula
core +3 more sources
Beilstein Journal of Organic Chemistry, 2012 The highly enantioselective Michael addition of 2-hydroxy-1,4-naphthoquinones to nitroalkenes, promoted by binaphthyl-modified chiral bifunctional organocatalysts is described.
Saet Byeol Woo, Dae Young Kim
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Biomimetic Synthesis of Antimalarial Naphthoquinones [PDF]
Journal of the American Chemical Society, 2005 The total synthesis of naphthoquinone natural products isolated from the Bignoniaceae plant family is described. Pinnatal, isopinnatal, sterekunthals A and B, pyranokunthones A and B, and anthrakunthone have been prepared along the lines of a biosynthetic proposal involving pericyclic reactions as key steps.
Jeremiah P, Malerich +3 more
openaire +3 more sources