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  • 1
    Electronic Resource
    Electronic Resource
    Synthesis and spectroscopic studies of dinuclear copper(II) complexes with new pendant-armed macrocyclic ligands (1998)
    Springer
    Transition metal chemistry 23 (1998), S. 371-373 
    Details
    ISSN: 1572-901X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Three dinuclear CuII perchlorate complexes of macrocyclic ligands derived from the condensation of sodium 4-X-2,6-diformylphenolate (X=Me, Cl or But) with 1,5-diamino-3-(8-methylquinolyl)azapentane were prepared by in situ transmetallation with Cu(ClO4)2 and characterized by physicochemical, spectroscopic and electrochemical methods.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006994300484
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  • 2
    Electronic Resource
    Electronic Resource
    Bestimmung des Cobalts neben Nickel und anderen Metallen durch differentielle Pulse-Polarographie in citrathaltigen Dimethylglyoxim-Lösungen (1983)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 314 (1983), S. 657-659 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Zusammenfassung Die Bestimmung des Cobalts neben 100–1000fachen Gehalten an Nickel und anderen Metallen durch differentielle Pulse-Polarographie wird durch Zusatz von Citrat zur ammoniumsalzhaltigen Dimethylglyoximlösung verbessert. Die Bestimmungsgrenze liegt bei 1–2 ppb Co. Lineare Eichkurven werden im Bereich von 0–100 ppb Co erhalten.
    Notes: Summary The determination of cobalt in the presence of a 100–1000-fold excess of nickel and other metals by differential pulse polarography in supporting electrolytes of dimethylglyoxime and ammonium salts is improved by addition of citrate. The limit of determination is 1–2 ppb Co. Linear calibration curves are obtained within the range of 0–100 ppb Co.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00487352
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  • 3
    Electronic Resource
    Electronic Resource
    Determination of traces of hemoglobin by square wave stripping voltammetry at a silver microelectrode (1996)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 356 (1996), S. 359-360 
    Details
    ISSN: 1618-2650
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract An electrochemical method was developed for the determination of traces of hemoglobin (Hb) by adsorption square wave voltammetric stripping at a bare silver microelectrode. Under optimum conditions the proposed method provided a linear response over the hemoglobin concentration range 5 to 100 nmol/L. The detection limit was 3 nmol/L. The relative standard deviation was 4.5% for 6 successive determinations at 50 nmol/L Hb. Other chemicals present in the sample did not interfere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0021663560359
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  • 4
    Electronic Resource
    Electronic Resource
    Redox reaction of myoglobin at a benzimidazole-modified silver electrode (1996)
    Weinheim : Wiley-Blackwell
    Electroanalysis 8 (1996), S. 465-467 
    Details
    ISSN: 1040-0397
    Keywords: Myaglobin ; Benzimidazole ; Chemically modified electrode ; Bioelectrochemistry ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Benzimidazole could be attached to a silver electrode by a covalent bonding method to give a high stable chemically modified electrode. Not only was the modified electrode electroactive, myoglobin could also undergo redox reactions at the surface of the electrode. In 0.20 mol/L NaAc-HAc buffer (pH 5.5), the benzimidazole modified electrode gave a pair of redox waves with a cathodic peak potential Epc of 0.10V and an anodic peak potential Epa of 0.25 V. On addition of myoglobin to the buffer, the peaks all increased due to the redox processes of the protein. In addition, comparison studies of the purified protein with the commercial sample revealed that myoglobin could still give electrode response even though it had not been previously purified. Therefore, benzimidazole modified silver electrode might be very attractive for the electrochemical studies of myoglobin.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140080512
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  • 5
    Electronic Resource
    Electronic Resource
    Voltammetric response of myoglobin at a modified silver electrode (1997)
    Weinheim : Wiley-Blackwell
    Electroanalysis 9 (1997), S. 1030-1032 
    Details
    ISSN: 1040-0397
    Keywords: Chemically modified electrode ; Myoglobin ; Captopril ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A silver electrode coated with captopril, 1-[(2S)-3-mercapto-2-methyl-1-oxopropyl]-L-proline, was prepared by covalent bonding method. The modified electrode was long-lived and stable. Experimental results revealed that myoglobin (Myb) could exhibit good voltammetric response at the modified electrode. Square wave voltammetric measurements of Myb with the modified electrode gave a linear relationship between the anodic peak current and the protein concentration in the range of 4 × 10-6 -5 × 10-5 mol/L. The relative standard deviation is 5 % for 6 successive determinations in 2 × 10-5 mol/L Myb.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140091311
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  • 6
    Electronic Resource
    Electronic Resource
    The study of differential pulse adsorptive stripping voltammetry of co(II)/1-nitroso-2-naphthol chelate (1993)
    Weinheim : Wiley-Blackwell
    Electroanalysis 5 (1993), S. 619-622 
    Details
    ISSN: 1040-0397
    Keywords: Cobalt ; Adsorptive stripping voltammetry ; Nitroso-naphthol ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Cobalt (II)/1-nitroso-2-naphthol chelate in citrate/ammonium citrate (pH 8.6) buffer solution is studied by adsorptive stripping voltammetry on a static mercury drop electrode (SMDE). The adsorbed chelate yields one distinct peak at -0.51 V, which can be utilized to quantify trace cobalt. The interfacial and redox behavior are evaluated by cyclic voltammetry and pulse polarography. The effect of accumulation potential, accumulation time, and concentration of ligand on the reduction peak currents of the chelate have been discussed. Possible interference metal ions are also investigated. The peak current is proportional to the concentration of cobalt in the range of 10-7 to 10-9 M (correlation coefficient 0.998). The relative standard deviation is 2.6% at the concentration of Co(II) 2.2 × 10-8 M (n = 7). The detection limit of Co(II) is as low as 0.05 ppb (2-minute accumulation).
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140050716
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  • 7
    Electronic Resource
    Electronic Resource
    The electrochemical behavior of methylene blue at a microcylinder carbon fiber electrode (1995)
    Weinheim : Wiley-Blackwell
    Electroanalysis 7 (1995), S. 1165-1170 
    Details
    ISSN: 1040-0397
    Keywords: Microelectrode ; Microcylinder carbon fiber electrode ; Methylene blue ; Electrode reaction kinetics ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The electrochemical behavior of methylene blue (MB) at a carbon fiber microcylinder electrode, was studied by cyclic voltammetry. The charge transfer coefficient α of the electrode reaction with two-electron transfer is 0.5, and the number of H+ participating in the electrode process is 3 at pH 2.2-5.4, 2 at pH 5.4-6.0 and 1 at pH 6.0-10.7, respectively. The standard electron transfer rate constant ko′, and standard formal potential Eo′ of MB at various pH were determined by using the carbon fiber microcylinder electrode. The electrode reaction mechanism of methylene blue at various pH is proposed. The adsorbability of MB at the electrode is discussed and explored by cyclic voltammetry and chronocoulometric technique.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elan.1140071213
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  • 8
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    〈i〉DUSP1〈/i〉 promoter methylation in peripheral blood leukocyte is associated with triple-negative breast cancer risk (2017)
    Nature Publishing Group (NPG)
    Details
    Publication Date: 2017-02-22
    Description: 〈i〉DUSP1〈/i〉 promoter methylation in peripheral blood leukocyte is associated with triple-negative breast cancer risk Scientific Reports, Published online: 21 February 2017; doi:10.1038/srep43011
    Electronic ISSN: 2045-2322
    Topics: Natural Sciences in General
    Published by Nature Publishing Group (NPG)
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  • 9
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    Comparative transcript profiling of alloplasmic male-sterile lines revealed altered gene expression related to pollen development in rice (Oryza sativa L.) (2016)
    BioMed Central
    Details
    Publication Date: 2016-08-07
    Description: Cytoplasmic male sterility (CMS) is an ideal model for investigating the mitochondrial-nuclear interaction and down-regulated genes in CMS lines which might be the candidate genes for pollen development in ric...
    Electronic ISSN: 1471-2229
    Topics: Biology
    Published by BioMed Central
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  • 10
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    Genome-wide analysis of DNA methylation in photoperiod- and thermo-sensitive male sterile rice Peiai 64S (2015)
    BioMed Central
    Details
    Publication Date: 2015-02-21
    Description: Background: Epigenetic modifications play important roles in the regulation of plant development. DNA methylation is an important epigenetic modification that dynamically regulates gene expression during developmental processes. However, little studies have been reported about the methylation profiles of photoperiod- and thermo-sensitive genic male sterile (PTGMS) rice during the fertility transition. Results: In this study, using methylated DNA immunoprecipitation sequencing (MeDIP-seq), the global DNA methylation patterns were compared in the rice PTGMS line PA64S under two different environments (different temperatures and day lengths). The profiling of the DNA methylation under two different phenotypes (sterility and fertility) revealed that hypermethylation was observed in PA64S (sterility), and 1258 differentially methylated regions (DMRs) were found between PA64S (sterility) and PA64S (fertility). Twenty differentially methylated genes of them were further validated through bisulfite sequencing, and four of these genes were analyzed by qRT-PCR. Especially, a differentially methylated gene (LOC_Os08g38210), which encoded transcription factor BIM2, is a component of brassinosteroid signaling in rice. The hypermethylated BIM2 gene may suppress some downstream genes in brassinosteroid signaling pathway, and thus affect the male fertility in PA64S. Conclusions: The results presented here indicated that hypermethylation was observed in PA64S (sterility). Gene Ontology (GO) analysis and KEGG analysis revealed that flavone and flavonol biosynthrsis, circadian rhythm, photosynthesis and oxidative phosphorylation pathways were involved in sterility-fertility transition of PA64S.
    Electronic ISSN: 1471-2164
    Topics: Biology
    Published by BioMed Central
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