吡啉

Spectrochim. Acta. A. Mol. Biomol. Spectrosc. 149 , 997-1008, (2015)

In this work, we reported a combined experimental and theoretical study on molecular structure, vibrational spectra and Homo-Lumo analysis of Purpurin and TiO2/Purpurin. The geometries, electronic structures, molecular orbital analysis of natural dye sensitiz...

Mutat. Res. 444(2) , 451-61, (1999)

Purpurin (1,2,4-trihydroxy-9,10-anthraquinone) is a naturally occurring anthraquinone pigment found in species of madder root. We have found that the presence of purpurin in bacterial mutagenicity assays is responsible for a marked inhibition of mutagenicity ...

Cancer Lett. 102(1-2) , 193-8, (1996)

Chronic toxicity and tumorigenicity of purpurin, a natural hydroxyanthraquinone, was examined in two groups of male F344 rats. One group was given a basal diet mixed with purpurin at a concentration of 1% throughout the experiment (520 days). Another group wa...

Semin. Hematol. 26(2) , 157-73, (1989)

Brain Res. Dev. Brain Res. 51(2) , 205-16, (1990)

Previous work showed that adhesive contacts made by growth cone filopodia involve extracellular filaments that can be labeled with an antiserum to adherons (adhesion-promoting complexes in conditioned medium). Here, adheron antigens were found to be different...

J. Agric. Food Chem. 51(11) , 3334-7, (2003)

Purpurin, an anthraquinone constituent from madder root, has previously been reported as antimutagenic in the Ames Salmonella bacterial mutagenicity assay and as antigenotoxic in Drosophila melanogaster, against a range of environmental carcinogens. Short-ter...

J. Photochem. Photobiol. B, Biol. 34(2-3) , 109-16, (1996)

Purpurins and benzochlorins are hydrophobic second generation photosensitizers, which have sizable absorption in the 650-780 nm range and exhibit photodynamic activity against tumors after visible light treatment. This review summarizes the published data reg...

Biochem. Biophys. Res. Commun. 184(2) , 938-44, (1992)

A mini-gene encoding rat retinol-binding protein (RBP) and a cDNA encoding chicken purpurin were separately transfected into HeLa cells. In contrast to RBP, expressed purpurin did not bind to transthyretin (TTR). A purpurin/RBP hybrid protein was constructed ...

Photochem. Photobiol. 50(2) , 169-74, (1989)

Studies were carried out on two purpurins, NT2 and an analog, Sn.NT2H2. Both are photosensitizers, but the latter is substantially more effective against neoplastic cells in vivo. These hydrophobic dyes can be solubilized via Cremophor EL emulsions. We found ...

Phytochemistry 60(6) , 567-72, (2002)

A peroxidase (EC 1.11.1.7) has been isolated and purified from Senna angustifolia. The enzyme was purified by ion-exchange chromatography on high Q and high S columns. SDS-PAGE electrophoresis showed that the protein has a molecular mass of approximately 70 k...