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Quinones (4):
Recent article
Quinones
Abstract
The iron(iii) complexes of the bis(phenolate) ligands 1,4-bis(2-hydroxy-4-methyl-benzyl)-1,4-diazepane H(2)(L1), 1,4-bis(2-hydroxy-4-nitrobenzyl)-1,4-diazepane H(2)(L2), 1,4-bis(2-hydroxy-3,5-dimethylbenzyl)-1,4-diazepane H(2)(L3) and 1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-1,4-diazepane H(2)(L4)...
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PMID: 20835480
PDF is available here.
PDF is available here.
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Analyst (Cambridge UK) (135)11 2010
Abstract
We have developed a molecular logic gate for the recognition of PPi with a fluorescent hypocrellin A-zinc(II) complex (HA-Zn(2+)), and the outputs of which correspond to the fluorescence emission ratio at 604 nm and wavelength shift relative to 629 nm. The emission at 604 nm is the intrinsic fluores...
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PMID: 20877861
PDF is available here.
PDF is available here.
Analyst (Cambridge UK) (135)11 2010
Abstract
This paper describes the use of microarray-based biosensor system for the determination of phenol. Microarrays based on poly(ethylene glycol)(PEG) hydrogel were prepared by photopatterning of a solution containing PEG diacrylate (PEG-DA), photoinitiator, tyrosinase, and CdSe/ZnS quantum dots (QDs)....
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PMID: 20852777
PDF is available here.
PDF is available here.
YAKUGAKU ZASSHI (130)10 2010
Abstract
Quinones are compounds that have various characteristics such as a biological electron transporter, an industrial product and a harmful environmental pollutant. Therefore, an effective determination method for quinones is required in many fields. This review describes the development of sensitive an...
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PMID: 20930484
PDF is available here.
PDF is available here.
Abstract
I (ID03-0561(T)) showed low relatedness to the other strains studied. The three strains in group II (ID03-0784(T), ID03-0808 and ID03-0809) formed a group with high relatedness (98-100 %) and showed low relatedness to the other strains studied. The two strains in group III (ID03-0810(T) and ID03-0...
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PMID: 19933586
PDF is available here.
PDF is available here.
Abstract
A Gram-negative, motile, non-spore-forming bacterial strain, designated MJ07(T), was isolated from a farm soil and was characterized to determine its taxonomic position by using a polyphasic approach. Comparative 16S rRNA gene sequence analysis showed that strain MJ07(T) belongs to the family Alcali...
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PMID: 19933592
PDF is available here.
PDF is available here.
Abstract
A Gram-negative, motile, non-spore-forming bacterial strain, designated HU1-GD12(T), was isolated from freshwater sediment. The strain was characterized by using a polyphasic approach in order to determine its taxonomic position. Comparative analysis of the 16S rRNA gene sequence showed that the iso...
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PMID: 19946046
PDF is available here.
PDF is available here.
Abstract
We propose the names Mucilaginibacter gossypii sp. nov. (type strain Gh-67(T) =NCIMB 14470(T) =KCTC 22380(T)) and Mucilaginibacter gossypiicola sp. nov. (type strain Gh-48(T) =NCIMB 14471(T) =KCTC 22379(T))....
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PMID: 19946048
PDF is available here.
PDF is available here.
Abstract
A polyphasic taxonomic study of a halotolerant bacterium, isolated from sandy rhizospheric soil in Sarbandar, Persian Gulf, Iran, revealed that strain HM6(T) represents a novel species within the genus Nocardiopsis. Results of the 16S rRNA gene sequence comparison revealed that strain HM6(T) cluster...
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PMID: 19933587
PDF is available here.
PDF is available here.
Abstract
Three strains of Gram-negative, rod-shaped, non-spore-forming bacteria (M 2040(T), M 1973 and M 1878-SK2), isolated from milk of camels at a camel-milk production farm in the United Arab Emirates, were investigated for their taxonomic allocation. On the basis of 16S rRNA gene sequence similarities,...
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PMID: 19933583
PDF is available here.
PDF is available here.
Abstract
A Gram-positive, endospore-forming, rod-shaped bacterium, strain PD-A10(T), was isolated from salted crab (poo-khem) in Thailand and subjected to a taxonomic study. Phenotypic and chemotaxonomic characteristics, including phylogenetic analyses, showed that the novel strain was a member of the genus...
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PMID: 19933584
PDF is available here.
PDF is available here.
Abstract
A bacterial strain, SPC26(T), was isolated from a sediment sample of the Southern Ocean off Antarctica. The strain was Gram-staining- and catalase-positive and contained lysine and alanine in the cell-wall peptidoglycan. The major cellular fatty acids were anteiso-C₁₅:₀ (54.92 %), iso-C₁...
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PMID: 19783612
PDF is available here.
PDF is available here.
Abstract
These results suggested that strain VN05A0561(T) represents a novel species of the genus Pseudonocardia, for which the name Pseudonocardia babensis sp. nov. is proposed. The type strain is VN05A0561(T) (=VTCC-A-1757(T)=NBRC 105793(T))....
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PMID: 19933589
PDF is available here.
PDF is available here.
Abstract
A Gram-stain-positive, aerobic bacterium, designated strain BZ41(T), was isolated from hydrocarbon-contaminated soil. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain BZ41(T) was related to members of the genus Agromyces and showed highest similarity with the type strain of...
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PMID: 19933590
PDF is available here.
PDF is available here.
Abstract
A novel Gram-negative, rod-shaped, non-motile bacterium, designated strain LW7(T), was isolated from a water sample collected at a depth of 4.5 m from Lonar Lake in Buldhana district, Maharastra, India. The cell suspension was dark-reddish orange due to the presence of carotenoids. The fatty acids w...
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PMID: 19933591
PDF is available here.
PDF is available here.
Abstract
A Gram-staining-negative, yellow-coloured, strictly aerobic, non-spore-forming, rod-shaped bacterium, designated HS39(T), isolated from a soil sample collected from a natural Populus euphratica forest in Xinjiang, China, was characterized using a polyphasic approach. The isolate grew optimally at 30...
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PMID: 19933581
PDF is available here.
PDF is available here.
Abstract
A Gram-negative, rod-shaped, non-spore-forming, strictly aerobic strain with gliding motility, designated JAMB N27(T), was isolated from sediment adjacent to sperm whale carcasses off Kagoshima, Japan, at a depth of 219 m. Strain JAMB N27(T) contained MK-6 as the major isoprenoid quinone and iso-C...
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PMID: 19915102
PDF is available here.
PDF is available here.
Abstract
A Gram-positive, coccoid, non-endospore-forming actinobacterium (strain 12-Be-011(T)) was isolated from indoor wall material. Based on 16S rRNA gene sequence comparisons, strain 12-Be-011(T) was clearly shown to belong to the genus Microlunatus and was most closely related to Microlunatus panaciterr...
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PMID: 19946055
PDF is available here.
PDF is available here.
Abstract
Strain KIT 00200-70066-1(T) was isolated from the sputum of a patient with pulmonary disease. Cells of the strain were Gram-variable, facultatively anaerobic, motile, spore-forming rods and formed colourless to white colonies on tryptic soy agar at 30 °C and pH 7. The pathogenicity of...
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PMID: 19946060
PDF is available here.
PDF is available here.
Abstract
A Gram-stain-positive, neutrophilic, rod-shaped bacterium, strain A1g(T), was isolated from activated sludge of a bioreactor and was subjected to a polyphasic taxonomic characterization. The isolate grew in the presence of 0-17.0 % (w/v) NaCl and at pH 6.0-9.0; optimum growth was observed in the p...
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PMID: 19946056
PDF is available here.
PDF is available here.
Abstract
An actinobacterial strain was isolated from subarctic forest soil, and subjected to polyphasic taxonomic characterization. The cell-wall peptidoglycan comprised meso-diaminopimelic acid, alanine and glutamic acid. MK-9(H₄) was the predominant isoprenoid quinone, and iso-C₁₇:₀, iso-C₁₅:...
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PMID: 19946054
PDF is available here.
PDF is available here.
Kidney International (78)10 2010
Abstract
Journal of Antibiotics (63)9 2010
Abstract
A new 1,1-dichlorocyclopropane-containing angucycline, JBIR-88 (1), and a new butenolide, JBIR-89 (2), respectively, were isolated from the fermentation broths of two lichen-derived actinomycetes identified as a new species of Streptomyces (strains RI104-LiC106 and RI104-LiB101) using phylogenetic m...
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PMID: 20664606
PDF is available here.
PDF is available here.
Abstract
The existence of different redox pools within the humate was confirmed, with the quinoid-centered redox entities showing the fastest kinetics. The results pertained to all size and polarity fractions....
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PMID: 20354802
PDF is available here.
PDF is available here.
Journal of Biological Chemistry (285)30 2010
Abstract
We describe a new respiratory complex that was isolated as a major protein present in the membranes of Desulfovibrio vulgaris Hildenborough. The complex, which was named Qrc, is the first representative of a new family of redox complexes. It has three subunits related to the complex iron-sulfur moly...
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PMID: 20498375
PDF is available here.
PDF is available here.
Abstract
We found that Hydroxysafflor Yellow A prevented cerebral ischemia-reperfusion injury by inhibition of thrombin generation. In addition, treatment with Hydroxysafflor Yellow A significantly inhibited NF-kappaB p65 nuclear translation and p65 binding activity, both mRNA and protein levels of ICAM-1 an...
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PMID: 20542424
PDF is available here.
PDF is available here.
Abstract
Alkylation of phenols with 1,3-cyclohexadiene (1) has been conducted and a series of cyclohexen-2-yl- and cyclohexyl-substituted phenols and quinones were screened against the proliferation of HUVEC and cancer cells. Phenol type as well as the size and occupied position of the substitute are importa...
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PMID: 20149494
PDF is available here.
PDF is available here.
Journal of Physical Chemistry A: Molecules, Spectroscopy, Kinetics, Environment and General Theory (114)19 2010
Abstract
Femtosecond time-resolved transient absorption was used to investigate the properties of the excited states of p-benzoquinone derivatives: ubiquinone 0 (UQ(0)), thermoquinone (TQ), and tetramethylbenzoquinone (TMBQ). To elucidate details of the deactivation pathways of quinones, experiments were car...
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PMID: 20426391
PDF is available here.
PDF is available here.
Abstract
A full account of an asymmetric synthesis of reblastatin (1) and the first total synthesis of autolytimycin (2) and related structural compounds is described. The syntheses expand the utility of a highly regio- and diastereoselective hydrometalation aldehyde addition sequence to assemble the fully f...
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PMID: 20392070
PDF is available here.
PDF is available here.
Abstract
Three typical biological solid wastes, animal manure, garbage, and sewage sludge, were compared with regard for the composting process and the changes in microbial community structure. The effect of different bulking agents such as rice straw, vermiculite, sawdust, and waste paper were compared in m...
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PMID: 20519917
PDF is available here.
PDF is available here.
Abstract
We describe a facile synthetic route to this anthraquinone, and we use this material to determine the mechanism by which DNQ induces death in cancer cells. DNQ was synthesized in seven linear steps through a route employing three palladium-mediated coupling reactions. Experiments performed on cancer...
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PMID: 20345134
PDF is available here.
PDF is available here.
Abstract
OBJECTIVE: By examining the colony growth rate, colony texture, substrate mycelium color and separation method of 40 anamorph strains of Shiraia bambusicola to investigate the relationship between these indexes and content of hypocrellin A. METHOD: In UV-spectrophotometry and microscopic observation...
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PMID: 20617672
PDF is available here.
PDF is available here.
Abstract
Abstract
Nine alkyl(aryl)thio derivatives of the marine sesquiterpene quinone avarone were synthesized by nucleophilic addition of thiols or thiophenol to avarone. In most cases only one regioisomer was obtained. Their cytotoxic activities, brine shrimp lethality and antibacterial activity were evaluated, as...
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PMID: 19995673
PDF is available here.
PDF is available here.
Abstract
Our understanding of the chemistry of cuticular sclerotization has increased considerably since Mark Pryor in 1940 suggested that enzymatically generated ortho-quinones react with free amino groups, thereby crosslinking the cuticular proteins. The results obtained since then have confirmed the essen...
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PMID: 19932179
PDF is available here.
PDF is available here.
Journal of Ethnopharmacology (127)3 2010
Abstract
Orally administered BBOH and BB at doses of 5 and 10mg/kg, markedly reduced the gastric lesions by 59 and 96%, and 32 and 76%, respectively, with superior results as compared to N-acetylcysteine (150 mg/kg, i.p.), reference compound that caused 85% lesion suppression. Although BBOH presented a highe...
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PMID: 20025953
PDF is available here.
PDF is available here.
Abstract
This work describes the isolation of the secondary metabolites identified as the quinonemethides maytenin (1) and pristimerin (2) from Maytenus ilicifolia extracts obtained from root barks of adult plants and roots of seedlings and their quantification by high performance liquid chromatography coupl...
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PMID: 20938406
PDF is available here.
PDF is available here.
Abstract
Members of the family Bignoniaceae are mostly found in tropical and neo-tropical regions in America, Asia and Africa, although some of them are cultivated in other regions as ornamentals. Species belonging to this family have been extensively studied in regard to their pharmacological properties (as...
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PMID: 20948497
PDF is available here.
PDF is available here.
Abstract
Hypocrellin B significantly enhanced the cytotoxicity of ultrasound radiation in the CNE2 cells. The damage to the mitochondrial structure and function might be an important cause of death in the CNE2 cells induced by treatment with ultrasound radiation and HB together....
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PMID: 20040774
PDF is available here.
PDF is available here.
Abstract
The Rel/NF-κB transcription factors have emerged as novel therapeutic targets for a variety of human diseases and pathological conditions, including inflammation, autoimmune diseases, cancer, ischemic injury, osteoporosis, transplant rejection and neurodegeneration. Several US FDA-a...
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PMID: 21425986
PDF is available here.
PDF is available here.
Abstract
OBJECTIVE: To study the optimum technical conditions of extracting Hydroxysafflor yellow A (HSYA) from Carthmus tinctorius by multi-stage countercurrent extraction technology. METHOD: The effects of extraction time of each stage, extraction temperature, ethanol concentration and solid-liquid ratio (...
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PMID: 20209905
PDF is available here.
PDF is available here.
Journal of Antibiotics (62)11 2009
Abstract
Inorganic Chemistry (48)18 2009
Abstract
The bifunctional ligand catechol-4,5 dithiol, H(2)Dtcat, has been synthesized, and the structure of the bis Br(-) adduct, (HS)(2)C(6)H(2)(OH)(2).2Ph(4)Br.H(2)O, has been determined. The syntheses, molecular structures, electronic structures, and magnetic properties of the monoanionic [(Dtcat(2-))(2)...
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PMID: 19691301
PDF is available here.
PDF is available here.
Biochemistry (Washington) (48)36 2009
Abstract
We propose to be the binding site for pyridine nucleotides and a space, but no obvious catalytic residues, near the flavin allowing the quinone to react. The decidedly suboptimized catalytic cycle suggests that selective pressures other than maximizing quinone consumption shaped the evolution of Lot...
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PMID: 19618916
PDF is available here.
PDF is available here.
Abstract
The new aromatic diterpenes 7beta-O-benzylrosmanol (3), 7beta-O-benzyl-11,12-di-O-methylrosmanol (4), and 7alpha-thiophenylcarnosic acid (5) have been obtained by partial synthesis from carnosol (1), an abundant natural diterpene present in Salvia species. The structures of these compounds were esta...
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PMID: 19711987
PDF is available here.
PDF is available here.
Abstract
With the catalysis of palladium, a number of 2-bromo-N-(2-iodobenzyl)benzamides underwent sequential cyanation/N-addition/N-arylation leading to the efficient construction of isoindolo[1,2-b]quinazolin-10(12H)-ones in a two-stage, one-pot manner. This method also allowed the convenient synthesis of...
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PMID: 19637856
PDF is available here.
PDF is available here.
Journal of Organic Chemistry (74)15 2009
Abstract
The use of cerium(IV) ammonium nitrate as a catalyst of the Friedländer reaction allows the synthesis of polysubstituted quinoline derivatives in excellent yields, avoiding the traditional harshly basic or acidic conditions. Unlike most other previously known reagents, CAN allows double condensat...
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PMID: 19534479
PDF is available here.
PDF is available here.
Biochemical Society transactions (37)Pt 4 2009
Abstract
We describe some biochemical properties of quinones and quinone oxidoreductases and then look in more detail at two model membranes that can be used to study quinone oxidoreductases in a native-like membrane environment with their native lipophilic quinone substrates. The results obtained with these...
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PMID: 19614580
PDF is available here.
PDF is available here.
Abstract
We studied the influence of HS and different quinones at low concentrations on ferrihydrite reduction by Geobacter metallireducens. The aquatic HS used were humic and fulvic acids (HA and FA) isolated from groundwater of a deep aquifer in Gorleben (Niedersachsen, Germany). HA stimulated iron reducti...
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PMID: 19731662
PDF is available here.
PDF is available here.
Abstract
The total syntheses of the PKC inhibitors (+)-calphostin D, (+)-phleichrome, cercosporin, and 10 novel perylenequinones are detailed. The highly convergent and flexible strategy developed employed an enantioselective oxidative biaryl coupling and a double cuprate epoxide opening, allowing the select...
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PMID: 19489582
PDF is available here.
PDF is available here.
Abstract
We used gene expression and transcription network connectivity data, genetic knockouts, and network component analysis (NCA) to map the initial isobutanol response network of Escherichia coli under aerobic conditions. NCA revealed profound perturbations to respiration. Further investigation showed A...
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PMID: 19536200
PDF is available here.
PDF is available here.
Antonie Van Leeuwenhoek (96)1 2009
Abstract
A novel Gram-positive, halotolerant, non-sporulating, non-motile, catalase-positive, oxidase-negative and aerobic bacterium, designated strain JSM 078085(T), was isolated from sea water collected from the South China Sea. Strain JSM 078085(T) exhibited a rod-coccus growth cycle and produced a yellow...
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PMID: 19337850
PDF is available here.
PDF is available here.
Abstract
We address the presence of the prekinamycin quinone methide using the techniques of spectral global fitting and the 13C-labeling of the reactive centre. Two-electron reduction of a prekinamycin affords a long-lived quinone methide species that was characterised spectrally. A correlation was made bet...
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PMID: 19421453
PDF is available here.
PDF is available here.
Abstract
The nuclear transcription factor NF-κB has gained considerable importance due to its major involvement in inflammation and constitutive activity in malignant cells. It is induced by a variety of stimuli and controls the expression of several proteins involved in biological processes...
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PMID: 21426075
PDF is available here.
PDF is available here.
Abstract
Quinone type compound, pulsaquinone 1, isolated from the aqueous ethanol extract of the roots of Pulsatilla koreana exhibited antimicrobial activities against an anaerobic non-spore-forming gram-positive bacillus, Propionibacterium acnes, which is related with the pathogenesis of the inflamed lesion...
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PMID: 19407964
PDF is available here.
PDF is available here.
Abstract
We calculated other possible water or dioxygen and proton channels. Putative oxygen positions obtained from a Xenon derivative indicate a role for lipids in oxygen diffusion to the cytoplasmic side of PSII. The chloride position suggests a role in proton-transfer reactions because it is bound throug...
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PMID: 19219048
PDF is available here.
PDF is available here.
Abstract
We propose the new species Acinetobacter antiviralis sp. nov., the type strain of which is KNF2022T(=KCTC0699BPT)....
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PMID: 19349749
PDF is available here.
PDF is available here.
Abstract
OBJECTIVE: To investigate the effects of Hydroxy Safflor yellow A (HSYA) on the growth of blood vessel of transplantation tumor of gastric adenocarcinoma cell line BGC-823 in nude mice and its underlying mechanism of antagonizing tumor angiogenesis. METHOD: The BGC-823 cells was subcutaneouly inject...
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PMID: 19526794
PDF is available here.
PDF is available here.
Molecular Microbiology (71)5 2009
Abstract
We have established the first genetic system for the manipulation and production of a member of the non-classical succinate:quinone oxidoreductase family. Biochemical characterization of the W. succinogenes enzyme reveals that the putative SQR is in fact a novel methylmenaquinol:fumarate reductase (...
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PMID: 19170876
PDF is available here.
PDF is available here.
Abstract
We report an investigation of the chemical reactivity of Gen and estrone quinones to determine the chemical differences of these two biologically important molecules. The catechol genistein quinone (CGenQ), has a half-life of 4 +/- 1 s under physiological condition, as determined by glutathione trap...
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PMID: 19115854
PDF is available here.
PDF is available here.