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Showing 1-30 of 46 results for "A90004" within Papers
Erin E Podlesny et al.
The Journal of organic chemistry, 78(2), 466-476 (2012-12-20)
The development of the first asymmetric synthesis of a chiral anthraquinone dimer is outlined, resulting in the first total synthesis of (S)-bisoranjidiol. Rather than a biomimetic dimerization retrosynthetic disconnection, the anthracenyl ring systems are generated after formation of the axially
Anthraquinone-A review of the rise and fall of a pulping catalyst.
Hart PW and Rudie AW
Tappi Journal, 13(10), 23-31 (2014)
Preparation, characterization and use of poly (4-vinylpyridinium) hydrogen sulfate salt as an eco-benign, efficient and reusable solid acid catalyst for the chemoselective 1, 1-diacetate protection and deprotection of aldehydes.
Khaligh NG and Shirini F
J. Mol. Catal. A: Chem., 348(1-2), 20-29 (2011)
Yasuhiro Kobori et al.
Journal of the American Chemical Society, 133(42), 16770-16773 (2011-10-07)
To elucidate how the protein-ligand docking structure affects electronic interactions in the electron-transfer process, we have analyzed time-resolved electron paramagnetic resonance spectra of photoinduced charge-separated (CS) states generated by light excitation of 9,10-anthraquinone-1-sulfonate (AQ1S(-)) bound to human serum albumin at
Marino Convertino et al.
Protein science : a publication of the Protein Society, 18(4), 792-800 (2009-03-25)
Amyloid aggregation is linked to a number of neurodegenerative syndromes, the most prevalent one being Alzheimer's disease. In this pathology, the beta-amyloid peptides (Abeta) aggregate into oligomers, protofibrils, and fibrils and eventually into plaques, which constitute the characteristic hallmark of
Malcolm E Tessensohn et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 16(1), 160-168 (2014-11-25)
Voltammetric experiments with 9,10-anthraquinone and 1,4-benzoquinone performed under controlled moisture conditions indicate that the hydrogen-bond strengths of alcohols in aprotic organic solvents can be differentiated by the electrochemical parameter ΔEp (red) =|Ep (red(1)) -Ep (red(2)) |, which is the potential
Sean P Hill et al.
The journal of physical chemistry letters, 6(22), 4510-4517 (2015-11-05)
Molecular photon upconversion via triplet-triplet annihilation (TTA-UC), combining two or more low energy photons to generate a higher energy excited state, is an intriguing strategy to surpass the maximum efficiency for a single junction solar cell (<34%). Here, we introduce
Cai-Juan Zheng et al.
Journal of natural products, 75(2), 189-197 (2012-01-27)
Five new hydroanthraquinone derivatives, tetrahydroaltersolanols C-F (1-4) and dihydroaltersolanol A (5), and five new alterporriol-type anthranoid dimers, alterporriols N-R (12-16), along with seven known analogues (6-11 and 17), were isolated from the culture broth and the mycelia of Alternaria sp.
Sana Zafar et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 114, 164-169 (2013-06-19)
Nonlinear optical properties of 1,4-Diamino-9,10-Anthraquinone dye in solution at different concentrations are investigated by utilizing single beam Z-scan technique using a low power continuous wave laser (λ=532 nm). The anthraquinone dye is found to exhibit self-defocusing and reverse saturable absorption
Myriam Bonose-Crosnier de Bellaistre et al.
Journal of chromatography. A, 1218(6), 778-786 (2011-01-14)
Chromatographic study of natural products helps to determine their molecular composition and to identify their sources (biological, geographical, etc.). However, identifying anthraquinoids is still a challenge because this chemical family is composed of more than half a thousand molecules. In
Hailong Yu et al.
Bioresource technology, 187, 161-166 (2015-04-08)
Green liquor (GL) combined with H2O2 (GL-H2O2) and green liquor (GL) combined with ethanol (GL-ethanol) were chosen for treating sugarcane bagasse. Results showed that the glucose yield (calculated from the glucose content as a percentage of the theoretical glucose available
Gui'e Xie et al.
British journal of pharmacology, 159(3), 689-697 (2010-02-05)
The aims of this study were to investigate the anti-cancer activity of SZ-685C, an anthracycline analogue isolated from marine-derived mangrove endophytic fungi, and to explore the molecular mechanisms underlying such activity. The effect of SZ-685C on the viability of cancer
A A Stepanov et al.
The Journal of organic chemistry, 76(21), 8737-8748 (2011-09-14)
The nature of products in the diazotization of 1-amino-2-acetylenyl-9,10-anthraquinones strongly depends on the nature of substituents at both the alkyne and at the anthraquinone core. Donor substitution (NHAr, OH) at the fourth position stabilizes the diazonium salt at C1, decelerating
Ying-Jung Chen et al.
Chemistry, an Asian journal, 10(4), 1025-1034 (2015-01-27)
Fluorescent chemosensors 1 and 2, with 1,2,4-oxadiazoles as the binding ligands and anthracene as the fluorophore, were synthesized through sequential 1,3-dipolar cycloaddition reactions of 25,27-dioxyacetonitrilecalix[4]arenes 8 and 11. The fluorescence of 1 was severely quenched by both Fe(3+) and Cu(2+)
Tomohiro Motono et al.
Journal of separation science, 38(14), 2381-2386 (2015-04-29)
Low-temperature high-performance liquid chromatography, in which a loop injector, column, and detection cell were refrigerated at -35ºC, using liquid carbon dioxide as the mobile phase was developed. Small organic compounds (polyaromatic hydrocarbons, alkylbenzenes, and quinones) were separated by low-temperature high-performance
Leila Qasemian et al.
Chemosphere, 84(10), 1321-1328 (2011-06-15)
Mediterranean coastal ecosystems are known to be highly subject to natural and anthropic environmental stress. In this study, we examine the effects of anthracene as a common pollutant on the total microbial communities from a Pinus halepensis litter of a
M Umadevi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 78(1), 122-127 (2010-10-26)
Preferential solvation of 1,4-dimethoxy-3-methyl anthracene-9,10-dione (DMMAD) has been investigated using optical absorption technique. The preferential solvation parameters show that the DMMAD is preferentially solvated by acetone in acetone (AC)+propan-2-ol (PROH), AC+CH2Cl2 and AC+CCl4 mixtures. DMMAD prefers PROH in PROH+CCl4 mixture.
Hassan Allouchi et al.
Acta crystallographica. Section C, Crystal structure communications, 64(Pt 11), o620-o622 (2008-11-08)
Anthraquinone derivatives form an important class of dyes and are also known for their medicinal properties. Recently, 2,3-disubstituted anthraquinones have been shown unexpectedly to jellify various organic solvents. No information on the packing mode of these derivatives was known. Here
Yu Shang et al.
Toxicology in vitro : an international journal published in association with BIBRA, 27(2), 922-931 (2013-01-22)
Traffic-related particulate matter (PM) is associated with adverse health effects. Quinones present in the traffic-related PM are hypothesized to contribute to these harmful effects through reactive oxygen species (ROS) generation. However, the impacts of the traffic-related PM and quinones on
Yanshuang Wang et al.
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica, 35(6), 763-767 (2010-06-16)
To research the effect of anthraquinone extracted from rubiqmnone on growth inhibition, introduction apoptosis and expression of relative gene of bcl-2 of hepatocarcinoma cell SMMC 7721, and provide the effective target of gene therapy. The growth inhibition effect was detected
Witold Nowik et al.
Journal of chromatography. A, 1218(23), 3636-3647 (2011-05-03)
A series of reversed phases bonded with several functional groups was investigated for separation of anthraquinone derivatives, following the previous work, dedicated to the selectivity of octadecyl silica bonded phases. Considering wide diversity of substitutions in hydrophobic anthraquinone skeleton, interactions
Leila Hejazi et al.
Rapid communications in mass spectrometry : RCM, 29(1), 91-99 (2014-12-03)
Mass spectrometric identification of compounds in chromatography can be obtained from molecular masses from soft ionization mass spectrometry techniques such as field ionization (FI) and fragmentation patterns from hard ionization techniques such as electron ionization (EI). Simultaneous detection by EI
Guillaume Fayet et al.
Journal of molecular graphics & modelling, 28(6), 465-471 (2009-12-29)
This work presents a quantitative structure-property relationship (QSPR)-based approach allowing an accurate prediction of the excited-state properties of organic dyes (anthraquinones and azobenzenes) from ground-state molecular descriptors, obtained within the (conceptual) density functional theory (DFT) framework. The ab initio computation
M Umadevi et al.
Journal of fluorescence, 18(6), 1139-1149 (2008-09-17)
Solvatochromic and preferential solvation of 1,4-dihydroxy-2,3-dimethyl-9,10-anthraquinone (DHDMAQ) have been investigated using optical absorption and fluorescence emission techniques. Optical absorption spectra of DHDMAQ in different solvents show the intra molecular charge transfer band in the region 400-550 nm. The observed blue
Francesco Ciriello et al.
Environmental science and pollution research international, 22(16), 12469-12478 (2015-04-24)
Airborne particulate matter (PM) contains several quinones, which are able to generate reactive oxygen species impacting on cell viability. A method able to detect and quantify PM oxidative potential, based on the cytochrome c (cyt-c) reduction by means of superoxide
B Hemmateenejad et al.
Talanta, 77(1), 351-359 (2008-09-23)
The retention behavior of 28 synthesized 9,10-anthraquinone derivatives in a reversed-phase (RP) high performance liquid chromatography (HPLC) system has been studied on a C18-RP column using acetonitrile-water mixtures as mobile phase. The influences of the composition of mobile phase and
The application of anthraquinone redox catalysts for accelerating the aeration step in the becher process.
Bruckard WJ, et al.
Hydrometallurgy, 73(1-2), 111-121 (2004)
Adity Bose et al.
The journal of physical chemistry. A, 112(47), 12045-12053 (2008-11-04)
Laser flash photolysis and an external magnetic field have been used to study the interaction of two quinone molecules, namely, 9,10-anthraquinone (AQ) and 2-methyl-1,4-naphthoquinone, commonly known as menadione (MQ), with the RNA base uracil (U) and two of its derivatives
Seyed Hadi Ebrahimia et al.
Archives of animal nutrition, 65(4), 267-277 (2011-09-06)
The objective of the present study was to investigate the hypothesis that 9,10-anthraquinone (AQ) in combination with fumaric acid (FMA) may provide complementary effects to inhibit methanogens and enhance rumen's capacity for better utilisation of FMA towards propionate production. Three
S Ranjitha et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 149, 997-1008 (2015-06-04)
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 sensitizer Purpurin were studied based on density
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