Showing 1-30 of 30 results for "37480"
Kunihiko Ishii et al.
The Journal of chemical physics, 131(4), 044512-044512 (2009-08-07)
We have studied IR-induced low-frequency coherent vibration of an intramolecularly hydrogen-bonded molecule, quinizarin, by an ultrashort IR-pump-visible-probe spectroscopy with approximately 60 fs time resolution. In this experiment, the IR excitation of the symmetric OH-stretching mode induced a low-frequency vibrational coherence...
Guang-Zhu Jin et al.
Archives of pharmacal research, 34(7), 1071-1076 (2011-08-04)
A series of 2-substituted-1,4-bis(dimethylamino)-9,10-anthraquinone derivatives were synthesized and their in vitro antiproliferative activities against p388 mouse leukemic tumor cells were evaluated. In addition, the effect of substituents on the phenyl ring was investigated. Among the derivatives tested, seven showed a...
T S Koch et al.
Biophysical chemistry, 36(3), 187-199 (1990-08-15)
The visible absorption spectra of 1,4-(dihydroxy)-9,10-anthraquinone and of Co(II), Ni(II), Cu(II) and Zn(II) chelates have been studied in different organic solvents. This system provides a model for the anthracycline antibiotics and their metal chelates. The band structure of the spectrum...
J Whitaker et al.
Chemosphere, 76(3), 345-352 (2009-04-29)
The introduction of Registration, Evaluation and Authorisation of Chemicals (REACH), requires companies to register and risk assess all substances produced or imported in volumes of >1 tonne per year. Extrapolation methods which use existing data for estimating the effects of...
Duy Duc Nguyen et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 77(1), 279-286 (2010-06-15)
The electronic transitions of the three alpha,alpha'-dihydroxy derivatives of anthraquinone, 1,4-dihydroxy-, 1,8-dihydroxy-, and 1,5-dihydroxy-9,10-anthraquinone (quinizarin, chrysazin, and anthrarufin), were investigated by synchrotron radiation linear dichroism (SRLD) spectroscopy on samples aligned in stretched polyethylene. With synchrotron radiation, polarization data could be...
Mohammad Saeid Hosseini et al.
Journal of hazardous materials, 190(1-3), 755-765 (2011-05-03)
This paper reports the results obtained by studying the ion-exchange properties of a new solvent impregnated resin (SIR), which was prepared by impregnation of quinizarin (1,4-dihydroxyanthraquinone, QNZ) on Amberlite XAD-16 after nitration of the benzene rings present in its structure....
Noufal Kandoth et al.
Photochemical & photobiological sciences : Official journal of the European Photochemistry Association and the European Society for Photobiology, 8(1), 82-90 (2009-02-28)
The interaction of 1,4-dihydroxy-9,10-anthraquinone, (quinizarin; QZ), with alpha-, beta- and gamma-cyclodextrin (CD) hosts, has been investigated using absorption, and steady-state and time-resolved fluorescence measurements, in order to understand the effects of cavity size of CDs on the binding of QZ...
Cyclization of 1,4-Dihydroxyanthraquinone with a,?-Unsaturated Aldehyde: A New Strategy for the Synthesis of Cyclopentanoids
Cao FX, et al.
Tetrahedron Letters (2015)
Zhang-Gao Le et al.
Molecules (Basel, Switzerland), 11(6), 464-468 (2007-10-27)
The reaction of 1,4-Dihydroxyanthraquinone with diamines was carried out in the presence of CuCl(2), CuCl in the ionic liquid [Bmim]PF(6), [Bmim]BF(4) or [Bmim]Cl x CuCl.
Sung-Woo Kim et al.
Journal of medicinal food, 8(4), 552-555 (2005-12-29)
In previous studies we found that Morinda citrifolia (Noni) fruit extract up-regulated biosynthesis of type I collagen and glycosaminoglycans in primary cultures of normal human fibroblasts. The objective of this study was to identify the active ingredients in Noni fruit...
Meiling Wang et al.
Environmental science & technology, 46(1), 367-373 (2011-12-02)
1,4-Dihydroxyanthraquinone (1,4-DHAQ, a fluorophore) doped cellulose (CL) (denoted as 1,4-DHAQ@CL) microporous nanofiber film has been achieved via simple electrospinning and subsequent deacetylating, and used for highly sensitive and selective fluorescence detection of Cu(2+) in aqueous solution. As the resultant byproduct...
Petronela Pascariu Dorneanu et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 134, 218-224 (2014-07-12)
Absorption and fluorescence spectra of a polyquinoneimine, PQI, built on 1,4-dihydroxyanthraquinone and a siloxane diamine, 1,3-bis(amino-phenylene-ester-methylene)tetramethyldisiloxane, have been investigated in solvents of different polarities. The effect of solvents on the spectral properties was investigated using Lippert-Mataga and Bakhshiev polarity functions...
D F Liberman et al.
Applied and environmental microbiology, 43(6), 1354-1359 (1982-06-01)
The mutagenicity of anthracene, anthraquinone, and four structurally similar compounds of each was evaluated in the Ames/Salmonella microsome assay. Anthraquinone was shown to be mutagenic for strains TA1537, TA1538, and TA98 in the absence of rat liver homogenate. The four...
Christopher Batchelor-McAuley et al.
Proceedings of the National Academy of Sciences of the United States of America, 108(50), 19891-19895 (2011-11-24)
After 35 years the hunt for improved anthracycline antibiotics is unabated but has yet to achieve the levels of clinical success desired. Electrochemical techniques provide a large amount of kinetic and thermodynamic information, but the use of such procedures is...
A R Tehrani-Bagha et al.
Journal of colloid and interface science, 376(1), 112-118 (2012-03-27)
Solubilization of two different types of organic dyes, Quinizarin with an anthraquinone structure and Sudan I with an azo structure, has been studied in aqueous solutions of a series of cationic gemini surfactants and of a conventional monomeric cationic surfactant...
E Tramontano et al.
Journal of chemotherapy (Florence, Italy), 23(5), 273-276 (2011-10-19)
Human immunodeficiency virus 1 (HIV-1) and Hepatitis C virus (HCV) affect 60 and 170 million infected individuals worldwide, respectively, and co-infection by both pathogens is often observed. This represents a serious public health problem that requires the identification of new...
Photochemical hole-burning study of 1,4-dihydroxyanthraquinone doped in amorphous silica prepared by alcoholate method
Tani T, et al.
Journal of Applied Physics, 58, 3559-3559 (1985)
Ardeshir Shokrollahi et al.
Environmental monitoring and assessment, 186(2), 1113-1121 (2013-09-26)
In this study, cloud point extraction was used for the preconcentration of Al(3+) ion after the complex formation with 1,4-dihydroxy-9,10-anthraquinone (Quinizarin [QUIN]), and subsequent analysis by spectrophotometeric method, using Triton X-114 as surfactant. The optimal extraction and reaction conditions were...
J Fostel et al.
FEMS microbiology letters, 138(2-3), 105-111 (1996-05-01)
DNA topoisomerase I is a potential target for therapeutic antifungal agents predicted to have a fungicidal mode of action. This report describes four agents with varying degrees of selectivity for the fungal topoisomerase I compared to the human enzyme: 5-hydroxy-1H-indole-3-acetic...
Xiaopeng Xuan et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 79(5), 1091-1098 (2011-05-13)
Molecular structure and vibrational spectra of 1,4-dihydroxyanthraquinone (1,4-DAQ) are studied theoretically and experimentally. FT-infrared and Raman spectra of 1,4-DAQ are recorded in solid phase in regions of 4000-400 and 3500-100 cm(-1), respectively. The geometry of 1,4-DAQ is optimized by B3LYP...
Farid A Badria et al.
Drug discoveries & therapeutics, 7(2), 84-89 (2013-05-30)
Plants that contain anthracene-derived compounds such as anthraquinones have been reported to act as anticancer besides their use for millennia to treat constipation, but the mechanism of action is still unfolding. Therefore we pursue this study to explore a new...
Exploring 1,4-dihydroxyanthraquinone as long-range emissive ratiometric fluorescent probe for signaling Zn2+/PO43-: ensemble utilization for live cell imaging
Sinha S, et al.
Journal of Photochemistry and Photobiology. B, Biology (2015)
Saadia Andleeb et al.
Environmental science and pollution research international, 19(5), 1728-1737 (2011-12-14)
Biodegradation and biodecolorization of Drimarene blue K(2)RL (anthraquinone) dye by a fungal isolate Aspergillus flavus SA2 was studied in lab-scale immobilized fluidized bed bioreactor (FBR) system. Fungus was immobilized on 0.2-mm sand particles. The reactor operation was carried out at...
N J Hao et al.
Mutation research, 328(2), 183-191 (1995-05-01)
The antimutagenicity of 17 natural and synthetic anthraquinones was determined using Salmonella typhimurium TA98 against 2-amino-3-methylimidazo[4,5-f]quinoline (IQ) in the presence of Aroclor 1254-induced rat hepatic S9. In general, the relationship between the chemical structures of anthraquinones and their antimutagenicity was...
X Ma et al.
Biochimica et biophysica acta, 781(1-2), 173-182 (1984-02-24)
The effect of dihydroxyanthraquinone (DHAQ), a new antitumor drug, on mammalian chromosome replication was investigated using simian virus 40 (SV40) as a model system. The maximum effect of inhibition on viral DNA synthesis was observed within 30-40 min after the...
D M Fouad et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 67(2), 564-567 (2006-10-20)
The ligand substitution reactions of dehydroacetic acid (Hdha) in [Fe(dha)(3)] with second ligand such as 8-hydroxyquinoline (Hquin), 1,4-dihydroxyanthraquinone (H(2)dhaq) and 1,4,5,8-tetra-hydroxyanthraquinone (H(4)thaq) were investigated spectrophotometrically by in low polarity solvents like benzene, chloroform and dichloromethane. It is deduced that the...
Stefania Rossi et al.
Anticancer research, 30(2), 445-449 (2010-03-25)
The anticancer potential of anthraquinones danthron and quinizarin on highly metastatic B16-F10 melanoma murine cells was investigated. Several parameters related to cell proliferation and differentiation, i.e. cell number, intracellular content of polyamines, transglutaminase (EC activity and melanin synthesis were...
M B Gholivand et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 87, 232-240 (2011-12-24)
The interaction of native calf thymus DNA (CT-DNA) with two anthraquinones including quinizarin (1,4-dihydroxy anthraquinone) and danthron (1,8-dihydroxy anthraquinone) in a mixture of 0.04M Brittone-Robinson buffer and 50% of ethanol were studied at physiological pH by spectrofluorometric and cyclic voltammetry...
M M Fiallo et al.
Journal of inorganic biochemistry, 75(2), 105-115 (1999-08-18)
The interaction of Fe3+ with several anthracycline antitumour antibiotics has been reinvestigated. Absorption and circular dichroism (CD) measurements were carried out (i) in aqueous solution and (ii) in semi-aqueous MeOH to avoid the stacking of the anthracycline molecules. The Fe3+...
P Guiraud et al.
Ecotoxicology and environmental safety, 69(2), 296-305 (2007-01-30)
Anthracene (AC) is a non-mutagenic and non-carcinogenic, low-molecular-weight polycyclic aromatic hydrocarbon present in the environment. Its toxicity can be dramatically increased after solar-light exposure. Biotransformation capacities of AC by Tetrahymena pyriformis and a selection of eight micromycetes were studied, and...

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