Results 21 to 30 of about 1,037 (167)

High performance liquid chromatography as a micro-destructive technique for the identification of anthraquinone red dyestuffs in cultural heritage objects

Chemistry Teacher International, 2023
This article describes two of the most common natural sources of red anthraquinones that have been used since antiquity for textile dyeing and as lake pigments, namely cochineal insect and the roots of Rubia and Relbunium plants.
Careaga Valeria P., Blanco Guerrero Astrid, Siracusano Gabriela, Maier Marta S.   +3 more
doaj   +1 more source

Zur Kenntniss des Purpurins. Verwandlung des Purpurins in Chinizarin [PDF]

Berichte der deutschen chemischen Gesellschaft, 1877
n ...
Schunck, E., Roemer, H.
openaire   +2 more sources

Purpurin Esters Containing a Saturated Cyclic Fragment with Antimicrobial Activity

Eurasian Chemico-Technological Journal, 2020
The present study is a continuation of the scientific research works for the synthesis of anthraquinonе-containing derivatives with cyclic ring systems by the interaction of 1,2,4-trihydroxyanthraquinone (purpurin) with cyclic carboxylic acid chlorides ...
Т. V. Kharlamova, R. B. Seidakhmetova, K. D. Praliyev   +2 more
doaj   +1 more source

Effects of Salt Stress and Inoculation Ratios in Cell Cultures of Rubia tinctorum L.

Sakarya Üniversitesi Fen Bilimleri Enstitüsü Dergisi, 2017
In this study, salt stress was implemented to callus and cell suspension cultures of Rubia tinctorum L. at 100 mM and 200 mM concentrations and the effects on fresh and dry weights (g), relative dry weight ratios, and alizarin and purpurin contents (mg/g
Pınar Nartop, Şeref Akay, Aynur Gürel
doaj   +1 more source

Structure-Antioxidative and Anti-Inflammatory Activity Relationships of Purpurin and Related Anthraquinones in Chemical and Cell Assays

Molecules, 2017
Anthraquinone (9,10-anthraquinone) and several hydroxy derivatives, including purpurin (1,2,4-trihydroxyanthraquinone), anthrarufin (1,5-dihydroxyanthraquinone), and chrysazin (1,8-dihydroxyanthraquinone), were evaluated for antioxidative and anti ...
Woo Nam, Sung Phil Kim, Seok Hyun Nam, Mendel Friedman   +3 more
doaj   +1 more source

Promoting photocatalytic CO2 reduction with a molecular copper purpurin chromophore

Nature Communications, 2021
Designing highly efficient chromophores comprising earth-abundant elements is essential for both light harvesting and electron transfer reactions.
Huiqing Yuan, Banggui Cheng, Jingxiang Lei, Long Jiang, Zhiji Han   +4 more
doaj   +1 more source

Anti-adipogenic and anti-obesity activities of purpurin in 3T3-L1 preadipocyte cells and in mice fed a high-fat diet

BMC Complementary and Alternative Medicine, 2019
Background The body responds to overnutrition by converting stem cells to adipocytes. In vitro and in vivo studies have shown polyphenols and other natural compounds to be anti-adipogenic, presumably due in part to their antioxidant properties.
Woo Nam, Seok Hyun Nam, Sung Phil Kim, Carol Levin, Mendel Friedman   +4 more
doaj   +1 more source

Ueber Alizarin und Purpurin [PDF]

Berichte der deutschen chemischen Gesellschaft, 1870
n ...
Graebe, C., Liebermann, C.
openaire   +1 more source

Corrosion Inhibition of Carbon Steel by Anthraquinones Derivatives in 1.0 M HCl: Electrochemical and Quantum Calculations

International Journal of Electrochemical Science, 2018
The effect of hydroxyl group number of some anthraquinon derivatives 1,2,4-trihydroxyanthraquinone (purpurin) and 1,4-dihydroxyanthraquinone (quinizarin) on their corrosion inhibition efficiency has been reported in order to establish a relationship ...
L. Saqalli, M. Galai, N. Gharda, M. Sahrane, R. Ghailane, M. Ebn Touhami, Y. Peres-lucchese, A. Souizi, N. Habbadi   +8 more
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The First Selenoanhydride in the Series of Chlorophyll a Derivatives, Its Stability and Photoinduced Cytotoxicity

Molecules, 2021
In this work, we obtained the first selenium-containing chlorin with a chalcogen atom in exlocycle E. It was shown that the spectral properties were preserved in the target compound and the stability increased at two different pH values, in comparison ...
Viktor Pogorilyy, Anna Plyutinskaya, Nikita Suvorov, Ekaterina Diachkova, Yuriy Vasil’ev, Andrei Pankratov, Andrey Mironov, Mikhail Grin   +7 more
doaj   +1 more source